Device and method for singulation of used beverage or food containers

Abstract

A device for singulation of used beverage or food containers received in bulk into individual objects, including: a first receiving area arranged for simultaneously receiving and keeping a plurality of containers; a second receiving area positioned at a higher vertical level than the first receiving area, wherein the device further includes a transporting device comprising a container elevating member for transporting a container from the first receiving area to the second receiving area wherein the elevating member is attached to said transporting device, moves along and is locked to a circumferential path around a first axis upon activation of the transporting device, and the first axis is inclined at an angle of 1° to 45° relative the horizontal plane.

Claims

1. A reverse vending machine for singulation of used beverage or food containers received in bulk into individual objects, said reverse vending machine comprising: a first receiving area arranged for simultaneously receiving and keeping a plurality of containers which are to be singulated; a first singulation transporting device for individual transporting of containers from said first receiving area to a second receiving area, and a front comprising an infeed for guiding a bulk of containers towards said first receiving area, wherein said front further comprises: a movable closing device for closing said infeed, which movable closing device is movable between an open state wherein said infeed is open, and a closed state wherein said infeed is closed; an automatic locking device configured to lock said movable closing device in said closed state after the start of a container singulation session, and unlock said movable closing device at the end of said container singulation session, and wherein said container singulation session is configured to be started before said movable closing device is closed.

2. The reverse vending machine according to claim 1, further comprising a safety arrangement for preventing user injuries.

3. The reverse vending machine according to claim 2, wherein said safety arrangement comprises a light curtain with a light beam.

4. The reverse vending machine according to claim 3, wherein said safety arrangement is configured to immediately shut down said reverse vending machine if the light beam is broken when said reverse vending machine is running.

5. The reverse vending machine according to claim 1, further comprising: a singulation monitoring device configured to issue an opening signal which is sent to said movable closing device, wherein said movable closing device is configured to open upon receiving said opening signal, wherein said singulation monitoring device is further configured to issue a closing signal which is sent to said movable closing device, and wherein said movable closing device is configured to close upon receiving said closing signal, and wherein said singulation monitoring device is configured to issue said closing signal based on at least one of: the fill level of the machine or said first receiving area, the amount of objects received at said first receiving area, the rate at which containers or objects are received at said first receiving area, the position of said movable closing device, the amount of objects or containers present in said first receiving area and/or the transportation rate from said first receiving area to said second receiving area.

6. The reverse vending machine according to claim 5, wherein said singulation monitoring device is configured to issue an activation signal which is sent to said automatic locking device, wherein said automatic locking device is configured to lock said movable closing device in the closed state, and wherein said singulation monitoring device is configured to issue an deactivation signal which is sent to said automatic locking device, and wherein said automatic locking device is configured to unlock said movable closing device.

7. The reverse vending machine according to claim 1, wherein said movable closing device comprises at least one hinge connecting said closing device to said front and/or wherein guides are attached to said front, to which guides said movable closing device is attached and/or said movable closing device is moved by a translating non-rotational movement following an outside surface of said front.

8. The reverse vending machine according to claim 1, wherein said movable closing device is arranged within the infeed of said reverse vending machine and said infeed is arranged to guide said bulk of containers towards said first receiving area.

9. The reverse vending machine according to claim 1, wherein said movable closing device, when arranged in said closed state, is arranged up-stream of said infeed and covering the same.

10. The reverse vending machine according to claim 1, wherein said second receiving area is positioned at a higher vertical level than said first receiving area.

11. A method of operating a reverse vending machine for singulation of used beverage or food containers received in bulk into individual objects, said method comprising: providing a reverse vending machine having a first receiving area arranged for simultaneously receiving and keeping a plurality of containers which are to be singulated; an infeed; a first singulation transporting device for individual transporting of containers from a first receiving area to a second receiving area; a movable closing device for closing said infeed, which closing device is movable between an open state wherein said infeed is open; a closed state wherein said infeed is closed; an automatic locking device configured to lock said movable closing device in said closed state at the start of a container singulation session, and unlock said movable closing device at the end of said container singulation session; receiving a bulk of used beverage or food containers through said infeed; receiving and keeping said bulk of used beverage or food containers at said first receiving area; individual transporting of containers from said first receiving area to a second receiving area, starting said container singulation session before closing said movable closing device, protecting the user of said reverse vending machine, wherein protecting the user comprises: providing an automatic locking device, providing an activation signal to said automatic locking device when said moveable closing device is to be locked, which activation signal is issued based on one or two or all of the following: the amount of objects received at said first receiving area, the rate at which containers or objects are received at said first receiving area, the position of said movable closing device, providing a deactivation signal to said automatic locking device when said moveable closing device is to be unlocked, which activation signal is issued based on one or both of the following: the amount of objects or containers present in said first receiving area, and said container transportation rate from said first receiving area to said second receiving area.

12. The method of operating a reverse vending machine according to claim 11, wherein said reverse vending machine further comprises a safety arrangement for preventing user injuries.

13. The method of operating a reverse vending machine according to claim 12, wherein said safety arrangement comprises a light curtain with a light beam.

14. The method of operating a reverse vending machine according to claim 13, comprising shutting down said reverse vending machine if said light curtain is broken when said reverse vending machine is running.

Description

DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 illustrates a device for singulation of objects, such as used beverage and food containers, received in bulk into individual objects.

(2) FIG. 2 illustrates a second embodiment of the device for singulation of used food or beverage containers.

(3) FIG. 3a illustrates a third embodiment of the device for singulation of used food or beverage containers.

(4) FIG. 3b is a top view of the embodiment of the device shown in FIG. 3a,

(5) FIG. 4a is a perspective view of a fourth embodiment of the device for singulation of used food or beverage containers,

(6) FIG. 4b is a perspective view of a section of the device of FIG. 4a,

(7) FIG. 5a is a top view of the device of FIG. 4a, showing the angle between the first axis and the main transportation direction of the containers,

(8) FIG. 5b is a side view of the device of FIG. 4a, showing the angle between the first axis and a horizontal plane,

(9) FIG. 6a is a perspective view of a section of the device of FIG. 4a showing the retaining means, the secondary retaining means, and the tertiary retaining means,

(10) FIG. 6b is a side view of the rotatable plate of the device of FIG. 4a, as seen along the first axis,

(11) FIG. 7 is a perspective view of the back side of the rotatable plate of the device of FIG. 4a, showing the flange extending around the periphery of the rotatable plate,

(12) FIG. 8 is a perspective view of a front of a reverse vending machine comprising a closing device according to one exemplary embodiment of a fifth aspect of the present inventive concept, wherein said closing device is in an open state,

(13) FIG. 9 is a perspective view of a front of a reverse vending machine comprising a closing device according to another exemplary embodiment of the fifth aspect of the present inventive concept, wherein said closing device is in an open state,

(14) FIG. 10 is a perspective view of a front of a reverse vending machine comprising a closing device according to another exemplary embodiment of the fifth aspect of the present inventive concept, wherein said closing device is in a closed state,

(15) FIGS. 11 and 12 are a perspective views of a front of a reverse vending machine comprising a closing device according to another exemplary embodiment of the fifth aspect of the present inventive concept, wherein said closing device is in a closed state and an open state, respectively,

(16) FIGS. 13 and 14 are a perspective views of a front of a reverse vending machine comprising a closing device according to another exemplary embodiment of the fifth aspect of the present inventive concept, wherein said closing device is in a closed state and an open state, respectively,

(17) FIG. 15 is a perspective view of a front of a reverse vending machine comprising a closing device according to another exemplary embodiment of the fifth aspect of the present inventive concept, wherein said closing device is in an intermediate state,

(18) FIG. 16 is a perspective view of a front of a reverse vending machine comprising a closing device according to one exemplary embodiment of the fifth aspect of the present inventive concept, as seen from the back,

(19) FIGS. 17a and 17b illustrate an embodiment of the device for singulation of used food or beverage containers.

(20) FIG. 18 illustrates one exemplifying sequence of steps that may be used for controlling the in-feed of the reverse vending machine in accordance with one aspect of the inventive concept, and

(21) FIG. 19 illustrates one example of how a signal may be directed in a reverse vending machine according one aspect of the inventive concept.

DETAILED DESCRIPTION

(22) A device 1, 1′, 1″, 1′″ for receiving objects, such as empty disposable hollow bodies, e.g. used food and/or beverage containers, in bulk and forwarding them individually for further processing will now be discussed more in detail with reference to the appended drawings.

(23) In this document, used beverage or food containers may also be referred to as objects.

(24) The bulk of food and/or beverage containers received by the device 1, 1′, 1″, 1′″ may be assorted and of different shapes and sizes. For example, the containers may be cans, odd-shaped, cylindrical or square bottles, TetraPak containers etc.

(25) The used beverage or food containers typically have an elongated shape, they can for example be substantially cylindrical.

(26) Furthermore, the food or beverage containers may be made of different materials, such as plastic, paper, metal or glass, or a combination thereof.

(27) The smallest container the device 1, 1′, 1″, 1′″ is able to receive and process may have half the height of the largest container being possible to receive and process by the device.

(28) The device 1, 1′, 1″, 1′″ may be adapted for being able to receive and process the different standard sizes of containers in different countries.

(29) The device 1, 1′, 1″, 1′″ may be placed in a cabinet. As an alternative the device may be free-standing.

(30) The device 1, 1′, 1″, 1′″ may be located in e.g. a local store, a residential area or a car park, for receiving and processing used beverage and/or food containers from consumers, or in an industrial building for sorting and processing of used beverage or food containers.

(31) The device 1, 1′, 1″, 1′″ may also be placed in e.g. cargo container, e.g. at a festival area, for receiving used beverage and/or food containers.

(32) Moreover, the device 1, 1′, 1″, 1′″ may be used to upgrade an existing reverse vending machine, and be placed in a cabinet of such a reverse vending machine. Optionally, some of the existing hardware and/or software are used also after the upgrade. Hence, the size of the device may be adapted to the standard size of already existing reverse vending machines.

(33) A first embodiment of the device 1 will now be discussed in detail with reference to FIG. 1.

(34) The device 1 in FIG. 1a has a first receiving area 2 into which the containers are collected after entering the device.

(35) The device 1 comprises a rotatable transporting device 4 provided with an elevating member 5 for transporting containers from the first receiving area 2 to a second receiving area 3. The elevating member 5 moves along and is locked to a circumferential path around a first axis x upon activation of the transporting device 4, which first axis x is inclined at an angle of 0 to 45° relative the horizontal plane.

(36) Upon activation, here rotation, of the transporting device 4, the elevating member 5 randomly brings the containers, one by one, from the first receiving area 2 to the second receiving area 3.

(37) The container is elevated by the elevating member 5 from the first receiving area 2 by a scooping, pushing or nudging action.

(38) When the container is at a predetermined vertical position, the so-called drop-off point, it leaves the elevating member 5 of the transporting device 4 and falls by means of gravity, alternatively slides off by a sliding motion, to the second receiving area 3.

(39) Hence, the transport of the containers from the first receiving area 2 to the second receiving area 3 takes place mainly in the vertical plane.

(40) The container may then be forwarded to an inspection area 19 provided with inspection means 7 for identification of the container, see FIG. 1.

(41) Based on the result of the identification, the container may be forwarded for further inspection, counting, recording, evaluating, sorting, storing, recycling, be returned to the user, or be returned to the first receiving area 2.

(42) The transporting device 4 may be designed in different ways, for example it may comprise a substantially circular plate 9 as illustrated in FIG. 1. Such a plate may be solid or be provided with openings or apertures.

(43) As an alternative the transporting device 4 may be a circular frame with a central opening.

(44) Alternatively, the transporting device may be a conveyor belt to which the elevating member 5 is fixedly attached (not shown).

(45) As a further alternative the transporting device 4 may be a wheel with a hub to which a number of spokes, each of which is provided with elevating members at its outer periphery (not shown).

(46) The transporting device 4 may comprise 1-20, 1-15, 2-25 or 5-10 elevating members 5.

(47) The number of the elevating members 5 may depend on the size of the transporting device 4. The elevating members 5 may be equally spaced or non-equally spaced around the transporting device 4.

(48) The elevating member 5 may have a size and design adapted for bringing containers of different shapes and sizes collected in the first receiving area 2 to the second receiving area 3.

(49) As seen in FIG. 1 the elevating member 5 may extend radially from the outer periphery of the transporting device 4 towards the center of the transporting device.

(50) As an alternative, the elevating member 5 may be arranged such that at least a portion thereof extends radially outwards from the outer periphery of the transporting device 4, as shown in FIG. 3a.

(51) If the transporting device 4 comprises more than one elevating member 5, the size of the elevating members may, but need not, be the same.

(52) As an alternative, the sizes of the elevating members may be different such that different elevating members 5 are adapted for different types or sizes of containers.

(53) The distance between the elevating members 5 may be adapted to the diameter of the transporting device and hence to the application of the device 1.

(54) As a non-binding example, the number of the elevating members may be eight and the diameter of the transporting device may be 1000 mm. Furthermore, the elevating members may extend radially inwards to the center of the transporting device by 100 mm and axially by 150 mm.

(55) The elevating member 5 and/or the container supporting surface of the elevating member may for example be rectangular, elliptical, flat, cup-shaped, formed as a paddle or shovel etc., or be a combination of these such as flat and rectangular. It may be solid or have small openings.

(56) If the transporting device 4 comprises more than one elevating member 5, the shape of the elevating members may, but need not, be the same.

(57) Further, each elevating member 5 may, but need not, be provided with a rim arranged at the outer periphery of the elevating member, and extending in the transport direction, for providing additional support to the container upon transport of the container from the first receiving area 2 to the second receiving area 3. Each elevating member 5 may additionally or alternatively be provided with a rim extending in a direction substantially orthogonal to the first axis.

(58) The transporting device 4 may be arranged such that it is substantially parallel with a main transportation direction A of a container moving in the second receiving area 3.

(59) As seen in FIG. 1, the transporting device 4 may further be arranged substantially vertically such that the first axis x around which upon the transporting device is rotating may be inclined with respect to the horizontal plane. In FIG. 1, the inclination of the first axis is about 15-20° with respect to the horizontal plane.

(60) The inclination of the first axis x and hence the transporting device 4 may make it easier for the elevating means 5 to single out a container from the first receiving area 2.

(61) The inclination of the first axis x and hence the transporting device may also prevent the containers from falling off the transporting device 4 upon activation, i.e. rotation, of the transporting device before the container reaches the drop-off point.

(62) The transporting device 4 may be rotatable in the clockwise or anti-clockwise direction.

(63) The transporting device 4 may be activated by a motor. Additionally or alternatively, the transporting device 4 may be activated by a driving wheel (not shown) arranged such that it is in contact with the transporting device 4. Upon activation of such driving wheel, by e.g. a motor, the transporting device may be activated. The motor may be controlled by a control unit.

(64) The transporting device 4 may be made of metal, plastic, wood or a combination thereof.

(65) The transporting device 4 may further comprise a retaining means 6. The purpose of the retaining means 6 is to retain the containers in the transporting device 4 when bringing the containers from the first receiving area 2 to the second receiving area 3.

(66) As seen in FIG. 1, the retaining means 6 may be a peripheral barrier. The retaining means 6 may be arranged at and extend along the outer periphery of the transporting device 4 from the first receiving area to the drop off point. The retaining means may also have a shorter extension, and extend only along a portion of the peripheral distance between from the first receiving area to the drop off point. Additionally or alternatively, the retaining means extends also beyond the drop off point.

(67) The retaining means 6 may be connected to an external frame and, hence, not being attached to the transporting device 4.

(68) As an alternative, the retaining means 6 may be fixedly connected to the transporting device 4.

(69) The retaining means 6 may e.g. be a rim made e.g. plastics, metal or wood.

(70) As discussed above the containers received in bulk are collected in the first receiving area 2 after entering the device 1. The containers are then kept in the first receiving area 2 until they are randomly brought from the first receiving area 2 to the second receiving area 3 by the elevating member 5.

(71) As seen in FIG. 1, the lower part of the first receiving area 2 may be arranged substantially horizontal and at a lower part of the transporting device 4.

(72) The size and shape of the first receiving area 2 may be adapted for receiving containers of different sizes and shapes in bulk.

(73) As shown in FIG. 1, the first receiving area 2 may be formed as a receptacle. As an example the first receiving area may be bowl-shaped.

(74) The bottom of the first receiving area 2 may be curved having the same or a similar curvature as the periphery of the transporting device 4.

(75) The first receiving area 2 may be adapted such that the elevating member 5 travelling through the first receiving area 2 may be able to bring containers from the first receiving area.

(76) A lower vertical portion of the transporting device 4 may form an inner wall of the first receiving area 2.

(77) The first receiving area 2 may be made of e.g. metal and/or plastic.

(78) Furthermore, as seen in FIG. 1, the device 1 comprises a second receiving area 3 for receiving the containers brought by the elevating members 5 arranged at the transporting device 4 from the first receiving area 2.

(79) The second receiving area 3 may be arranged adjacent to the transporting device 4 and at a higher vertical level with respect to the first receiving area 2.

(80) The second receiving area 3 may be positioned substantially horizontally in the center of the transporting device, but may also be arranged at a lower or higher position.

(81) In FIG. 1, the second receiving area 3 is a plate which is tilted outwards with respect to the transporting device 4. The tilt of the plate may enable the forwarding towards the container inspection area.

(82) The second receiving area 3 may have an elongated shape in the horizontal direction.

(83) Depending on the extension of the second receiving area 3 in the horizontal direction, it may have recesses at one or both ends adapted such that the elevating member 5 arranged on the transporting device 4 can pass upon activation of the transporting device 4.

(84) The second receiving area 3, being a plate, may be made of a material of low surface friction such as stainless steel, aluminum or a suitable plastic material.

(85) Adjacent, or slightly below, the second receiving area 3 there may be a third receiving area 14, such as a conveyor belt for facilitating transport of the containers towards the container inspection area, see FIG. 1.

(86) The conveyor belt of the third receiving area may be a V conveyor or a flat conveyor.

(87) As an alternative the second receiving area 3 and the third receiving area 14 may be one and the same. Such arrangement may comprise solely of a conveyor belt onto which the containers fall and are transported to the container inspection area 19 (not shown).

(88) As a further alternative if the second receiving area 3 and the third receiving area 14 are the same, the arrangement may comprise solely of a plate made of a material with low surface friction, such as metal or a suitable plastic material, which is tilted towards the inspection area 19 such that the containers received at the combined second and third receiving area slides towards the inspection area 19.

(89) As seen in FIG. 1, the device 1 may further comprise an inspection area 19 provided with inspection means 7 through which the containers are transported in order to identify the container. Based on the information obtained by the inspection means 7, the container may be either accepted or rejected. There are several different options how an accepted or rejected container can be handled.

(90) According to one example, if being accepted the container may be forwarded to a box (not shown), for example a box for containers to be recycled. As an alternative there may be several different boxes to which an accepted container may be forwarded, depending on e.g. the type and/or size of the container.

(91) If being rejected, the container may be transported back to the first receiving area 2, back to the user, or directly to a trash collector 12.

(92) The inspection means 7 may be a camera or a scanner, such as a bar code reader.

(93) As an example, the inspection means 7 may be an OneRing system which comprises a camera for identifying a large part of the container. The camera of the OneRing system may be able to handle 80 to 220 objects per minute.

(94) There may be further number and types of inspection means, e.g. cameras, scanners etc., arranged in series or in parallel in order to obtain different information of the containers such that the containers can be sorted based on this information.

(95) The inspection area 19 may further be provided with a decision unit arranged for receiving a signal from the inspection means 7 and based on this signal being arranged to send a container to a sorting station, back to the first receiving area 2 or to an outfeed 21 of the device 1.

(96) A container may be rejected if the inspection means 7 is not able to identify the container. If being rejected, the container may be sent back to the first receiving area 2 in order to provide for another read of the container. This may be done by a conveyor belt (not shown) positioned on a lowering mechanism and being arranged after the inspection area 19 with respect to the transport direction A of a container in the second receiving area 3 and/or third receiving area 14. Such a conveyor may be folded down and thereby forwarding the container back to the first receiving area 2.

(97) As an alternative, a rejected container may be returned back, via an outfeed 21 to the user, such that the user can determine whether he or she should insert the container in the device once again, throw away or keep the container. This may be done by a conveyor belt.

(98) The first receiving area 2 may be mounted onto brackets which may be mounted onto or in connection with a trash collector 12, see FIG. 1. Such a trash collector may hence be situated below the first receiving area 2. The trash collector may have any shape, e.g. rectangular shape.

(99) The trash collector may be releasable connected to the device such that it can be released and the trash collector can be emptied.

(100) The first receiving area may further be provided with a lowering mechanism in connection with the brackets, a so-called drop-down chute 13.

(101) Hence, the first receiving area 2 may be emptied by means of lowering the drop-down chute 13 such that the containers in the first receiving area 2 fall into the trash collector 12. This may be useful when many containers have been returned to the first receiving area 2.

(102) For example, the first receiving area 2 may be emptied after a certain time of activation of the transporting device 4, or after a certain number of containers have been rejected and thus returned back to the first receiving area 2.

(103) The containers ending up in the trash collector 12 may be taken care of and sorted manually or just being regarded as garbage.

(104) The device 1 may further comprise an infeed 8 for facilitating the containers to enter the first receiving area 2.

(105) The infeed 8 may be connected to the first receiving area 2.

(106) In the absence of infeed 8, there may only be an opening in e.g. a cabinet in which the device 1 is placed, to which the containers can be fed. Such an opening may hence be arranged adjacent to the first receiving area 2.

(107) The size of the opening may be adapted to allow containers of different sizes and shapes to enter into the device 1 and to fulfill the requirements of the safety standard NS-EN 349:1992+A1:2008.

(108) Moreover, the distance between the opening and the transporting device 4 may be adapted to fulfill the requirement of the standard, ISO 13857:2008, Safety of machines.

(109) According to a further safety standard, ISO 13857:2008 of machines, the opening should comprise different safety arrangement for preventing injuries. For example, it can comprise a light curtain with a light beam which functions such that, when the device 1 is running, the device is immediately shut down when the light beam is broken.

(110) The infeed 8 may comprise a tray which may be slightly tilted with respect to the horizontal plane in order to facilitate the containers to be forwarded to the first receiving area 2.

(111) The infeed may be made of a plastic material, metal and/or wood.

(112) The infeed 8 may further comprise rims on both sides in order to retain the containers being forwarded towards the first receiving area 2 and to prevent the containers from falling off the infeed upon being forwarded to the first receiving area 2.

(113) The tray may be provided with slits in order to handle loose objects, e.g. pieces of paper such as labels from containers, into which the loose objects can fall.

(114) Loose objects may fall onto a steep surface located below the infeed and be guided directly or via a funnel 11 to a trash collector.

(115) The trash collector may, but need not, be the same as the trash collector 12 or containers discussed above.

(116) The infeed 8 may further comprise a conveyor belt in order to further facilitate transport of the containers from the tray towards the first receiving area 2. The conveyer belt may be arranged between the tray and the first receiving area of the device 1 and hence being adapted to the size of the infeed and the opening of the device.

(117) Such a conveyor belt may comprise rims on both sides in the longitudinal direction in order to prevent the objects from falling off from the conveyor and to retain the containers towards the first receiving area 2.

(118) The conveyor belt may be positioned substantially horizontal with respect to the horizontal plane.

(119) Alternatively the infeed 8 may comprise solely a tray or solely a conveyor belt.

(120) A second embodiment of the device 1′ which is similar to the embodiment of the device 1 described above will now be discussed with reference to FIG. 2. The device 1′ of the second embodiment differs from the device 1 of the first embodiment in that it is provided with additional retaining means 10′ and in that the second receiving area 3′ is arranged differently.

(121) In this device 1′ additional retaining means 10′ may optionally be arranged radially inside the transporting device 4′ and is arranged radially below the elevating means 5′.

(122) The retaining means 10′ may be curved and extend at least along a portion of the peripheral distance along which the container is brought between the first receiving area 2′ and the second receiving area 3′.

(123) The purpose of the retaining means 10′ is to prevent the containers from falling off the transporting device 4′ before reaching the drop-off point when being brought from the first receiving area 2′ to the second receiving area 3′.

(124) The retaining means 10′ may be arranged on an external frame.

(125) As shown in FIG. 2, the second receiving area 3′ may be located at a higher vertical level as compared to the second receiving area of the device in the embodiment described with reference to FIG. 1 above.

(126) The containers may be forwarded from the elevating member 5′ to the second receiving area 3′ by means of gravity as discussed above.

(127) Alternatively, they may slide off the elevating member 5′ by a sliding motion when the elevating member 5′ has brought a container to a predetermined vertical position, i.e. the so-called drop-off point.

(128) How the container is released from or leaves the elevating member 5′ may depend on the distance between the so-called drop-off point and the second receiving area 3′.

(129) As seen in FIG. 2, the second receiving area 3′ may be arranged at a higher part in the vertical plane of the transporting device 4′ as compared to the arrangement shown in FIG. 1. Further, as shown in FIG. 2 the second receiving area 3′ may extend outwards from the transporting device 4′ in the horizontal plane.

(130) The second receiving area 3′ and/or the third receiving area 14′ may further be provided with a retaining member 18′ for retaining the containers upon being forwarded towards the inspection area 19′. The retaining member 18′ may extend along the whole or a portion of the second receiving area 3′ and/or third receiving area 14′. The retaining member 18′ may be present on one or both sides of the second receiving area 3′ and/or third receiving area 14′.

(131) A third embodiment of the device 1″ will now be discussed with reference to FIG. 3a and FIG. 3b. The device 1″ of the third embodiment differs from the device 1 in FIG. 1 mainly in how the transporting device 4″ is arranged in relation to the rest of the components of the device 1″.

(132) As seen in FIG. 3a and in FIG. 3b, the transporting device 4″ may be arranged such that the first axis x of the transporting device 4″ is substantially parallel with respect to a main transportation direction A of a container in the second receiving area 3″ and/or third receiving area 14′.

(133) As shown in FIG. 3a and FIG. 3b (see also, FIGS. 17a-17b), the transporting device 4″ may be provided as a frame 9″ with a central opening. Alternatively, it may be a solid plate as discussed above.

(134) If the transporting device 4″ is provided as a frame 9″, as shown in FIG. 3a and FIG. 3b, the transporting device 1″ may be activated by a driving wheel (not shown) as described above.

(135) Moreover, as seen in FIG. 3a and FIG. 3b, the elevating member 5″ may be arranged such that at least a portion thereof extends radially outwards from the outer periphery of the transporting device 4″. As an alternative the elevating member may be arranged as described above, i.e. that it extends radially inwards towards the center of the transporting device 4″.

(136) In FIG. 3a, two bottles that have just been singulated or picked-up are each in contact with a container supporting surface of a respective container elevating member.

(137) The device 1″ may have additional retaining means 10″ for retaining a container being brought from the first receiving area 2″ to the second receiving area 3″. The retaining means 10″ may be arranged radially inside the transporting device 4″. The retaining means may be connected to an external frame of the device 1″.

(138) The retaining means 10″ may extend at least along a portion of the path along which the container is brought between the first receiving area 2″ and the second receiving area 3″.

(139) Optionally the device 1″ may have a rotating plate or surface 20″ arranged at the top of the transporting device 4″ guiding a container to change travel direction of the container, forcing the container to leave the transporting device 4″ and enter the second receiving area 3″.

(140) Such a rotating plate may be arranged on the retaining means 10″.

(141) The device 1″ may be provided with further retaining means 18″ extending along the second receiving area 3″ and/or the third receiving area 14″ in order to retain the containers and to prevent them from falling off the second receiving area 3″ and/or third receiving area 14″.

(142) After being identified the container may be sorted by means of a propeller wheel 17″.

(143) The propeller wheel 17″ may for example be arranged at or in near vicinity of the inspection means 7″.

(144) The arrangement of a propeller wheel for sorting of containers may be used also in the first and second embodiments of the device as discussed above.

(145) The propeller wheel 17″ may be rotatable clockwise or anti-clockwise. Hence, depending on the propelling direction the propeller wheel may forward a container either to a first conveyor belt 15″ or to a second conveyor belt 16″ arranged on either side of the device 1″.

(146) The conveyor belts 15″ 16″ may be arranged at a lower position in the vertical plane as compared to the second receiving area 3″ and/or third receiving area 14″.

(147) The first conveyor belt 15″ may extend such that it is arranged from the end of the inspection area 19″ to the first receiving area 2″, see FIG. 3a. The transport direction of a container travelling on the conveyor belt 15″ and conveyor belt 16″ may be the opposite as compared to the transport direction A of a container travelling on the second receiving area 3″ and/or the third receiving area 14″.

(148) As seen in FIG. 3a and FIG. 3b, the conveyor belt 15″ and conveyor belt 16″ may be arranged through the center of the frame 9″ of the transporting device 4″ in the horizontal plane.

(149) Hence, the first conveyor belt 15″ may be arranged such that a container forwarded to the first conveyor belt may be transported back to the first receiving area 2″. This may be useful if e.g. the inspection means 7″ do not get a proper reading of the container and, hence, is not able to identify the container.

(150) Hence, the second conveyor 16″ belt may be arranged such that a container being forwarded to the second conveyor belt may be transported back through the transporting device 4″ to the user of the device 1″.

(151) A fourth embodiment of the device 1′″ will now be discussed with reference to FIGS. 4a-7. The device 1′″ of the fourth embodiment differs from the device 1″ in FIGS. 3a and 3b mainly in how the second receiving area is arranged in relation to the transporting device 4′″ and in how the retaining means (6′″, 10′″, 2001) are arranged. The device 1′″ in FIG. 4a has a first receiving area 2′″ into which the containers are collected after entering the device 1′″.

(152) The device 1′″ comprises a rotatable transporting device 4′″ provided with elevating members 5′″ for transporting containers from the first receiving area 2′″ to a second receiving area 3′″. The transporting device 4′″ in FIG. 4a is provided as a rotatable plate 9′″, similar to that of the previous embodiments but lacking the through-hole of the third embodiment. Moreover, the elevating members 5′″ are arranged such that at least a portion thereof extends radially outwards from the outer periphery of the transporting device 4′″, just as in the third embodiment of the invention. The elevating members 5′″ move along and are locked to a circumferential path around a first axis x upon activation of the transporting device 4′″, which first axis x is inclined at an angle α.sub.4 of approximately 20° relative the horizontal plane. This angle α.sub.4 is shown in FIG. 5b.

(153) Upon activation, here rotation, of the transporting device 4′″, the elevating member 5′″ randomly brings the containers, one by one, from the first receiving area 2′″ to the second receiving area 3′″. This is shown in FIG. 4b. The container is elevated by the elevating member 5′″ from the first receiving area 2′″ by a scooping, pushing or nudging action.

(154) When the container is at a predetermined vertical position, the so-called drop-off point, it leaves the container supporting surface of the elevating member 5′″ of the transporting device 4′″ and slides off by a sliding motion to the second receiving area 3′″, herein embodied by a conveyor belt 14″. Hence, the transport of the containers from the first receiving area 2′″ to the second receiving area 3′″ takes place mainly in the vertical plane.

(155) The transporting device 4′″ shown in FIG. 4a comprises 8 elevating members 5′″. The number of the elevating members 5′″ depend on the size of the transporting device 4′″. The elevating members 5′″ are equally spaced in the embodiment shown in FIG. 4a, and have a size and design adapted for bringing containers of different shapes and sizes collected in the first receiving area 2′″ to the second receiving area 3′″.

(156) As seen in FIG. 4a, the elevating members 5′″ may extend radially from the outer periphery of the transporting device 4′″ and away from the center of the rotatable plate 9′″ of the transporting device 4′″.

(157) In FIG. 4b, one bottle that has just been singulated or picked-up is in contact with a container supporting surface of a container elevating member 5′″. Another container which has not been picked up lies in the first receiving area 2′″, waiting to be picked up by a container elevating member 5′″. The container elevating members 5′″ are arranged at an angle α.sub.1 relative to the rotatable plate 9′″, wherein this angle α.sub.1 is approximately 105°.

(158) The device 1′″ has retaining means 6′″ arranged radially outwards of a portion of the circumference of the circumferential path of the container elevating members 5′″. The retaining means 6′″ is flexibly connected to the device 1′″ such that it may deflect radially outwards when a container larger than the space between the retaining means 6′″ and the container elevating members is moved from the first receiving area 2′″ to the second receiving area 3′″. This is clearly shown in FIG. 4b. This allows the retaining means 6′″ to exert a constant pressure on the containers transported on the container elevating members 5′″, thus helping to keep them in place. The retaining means 6′″ may be fixedly connected to the device 1′″ in one end 2002. As shown in FIG. 4b, the retaining means 6′″ is fixedly connected to the device 1′″ at a location halfway between the second receiving area 3′″ and the first receiving area 2′″. In other words, using a standard 12-hour clock as a reference for the front surface of the rotatable plate 9′″, the retaining means 6′″ extends from about 9 o'clock on the rotatable plate 9′″ to approximately 11 or 12 o'clock. The retaining means 6′″ can be seen as a leaf spring configured to exert pressure on the containers as they are transported from the first receiving area 2′″ to the second receiving area 3′″.

(159) The device 1′″ further comprises secondary retaining means 2001, not shown in FIG. 4b, arranged for retaining a container on the container elevating members 5′″ while the container is being brought from the first receiving area 2′″ to the second receiving area 3′″. The secondary retaining means 2001 is more clearly shown in FIG. 6a. The secondary retaining means 2001 is a barrier that is substantially parallel with the transporting device 4′″, i.e. a wall offset from the transporting device 4′″. The wall or secondary retaining means 2001 is seen in FIG. 6a as being arranged at a distance from the transporting device 4′″ such that a container may fit between the rotatable plate 9′″ of the transporting device 4′″ and the secondary retaining means 2001. Thus, the secondary retaining means 2001, in combination with the rotatable plate 9′″ and the other retaining means 6′″, 10′″, forms a channel or passage through which the containers may pass as they move from the first receiving area 2′″ to the second receiving area 3′″.

(160) As seen in FIGS. 5a and 5b, the transporting device 4′″ is arranged such that the first axis x of the transporting device 4′″ is arranged at an angle α.sub.3 relative to a main transportation direction A of a container in the second receiving area 3′. This angle is neither perpendicular, as in the first and second embodiment described above, nor parallel, as in the third embodiment described above. Instead, the first axis x is angled somewhere between, at an angle α.sub.3 of around 105° relative to the main transporting direction A of the container in the second receiving area 3′″.

(161) As is seen in FIG. 6, the secondary retaining means 2001 is flexibly connected to the device 1′″ by means of two flexible connection means, i.e. two leaf springs, such that the secondary retaining means 2001 may deflect in a direction that is substantially parallel with the first axis x. This is to be understood as meaning that the distance between the secondary retaining means 2001 and the rotatable plate 9′″ of the transporting device 4′″ may be increased by a container passing therebetween, thus causing the secondary retaining means 2001 to flexibly deflect outwards and away from the transporting device 4′″. Just as the secondary retaining means 2001 is caused to flexibly deflect away from the transporting device 4′″, it also pushes back against the containers, thus holding them in place on the container elevating members 5′″. Additionally, the secondary retaining means 2001 comprises a guiding flange 2003. The guiding flange 2003 is a portion of the secondary retaining means 2001 that protrudes away from the transporting device 4′″ at an angle as relative to the remainder of the secondary retaining means 2001. This angle as is approximately 135°, and this helps align containers that are slightly misaligned with the circumferential path of the container elevating members 5′″. This also ensures that the containers are held in place on the container elevating members 5′″ as they are transported from the first receiving area 2′″ to the second receiving area 3′″. Finally, as is seen in FIG. 6b, the secondary retaining means 2001 extend from a position proximal to the drop-off point of the containers, to a position slightly less than halfway between the first receiving area and the drop-off point. In other words, the secondary retaining means 2001 extends from 12 o'clock on the rotatable plate 9′″ to approximately 10 o'clock.

(162) The device 1′″ also has tertiary retaining means 10′″ for retaining a container being brought from the first receiving area 2′″ to the second receiving area 3′″. The tertiary retaining means 10′″ is arranged radially inwards of the circumferential path of the container elevating members 5′″. Furthermore, the tertiary retaining means 10′″ comprises a container supporting surface proximal to an uppermost portion of the transporting device 4′″ and which surface is facing radially outwards. Thus, containers elevated by the container elevating members 5′″ may rest on a container supporting surface of the tertiary retaining means 10′″ as they are transported from the first receiving area 2′″ to the second receiving area 3′″. The tertiary retaining means 10′″ is fixedly connected to the device 1′″ by means of an arm extending in a direction substantially parallel with a horizontal projection of the first axis x.

(163) The tertiary retaining means 10′″ extends along a portion of the circumferential path along which the container is brought between the first receiving area 2′″ and the second receiving area 3″. Specifically, the tertiary retaining means 10′″ extends along approximately 20% of the circumference of the rotatable plate 9″. The extension of the tertiary retaining means 10′″ is measured as a percentage of a 360° circle centered around the first axis x. One end of the tertiary retaining means 10′″ is located at a position proximal to the container drop-off point, i.e. at a position proximal to 12 o'clock on the rotatable plate 9′. In other words, the tertiary retaining means 10′″ extends from an upper portion of the rotatable plate 9′ and down towards the first receiving area 2′.

(164) The tertiary retaining means 10′″ further comprises a wedge-shaped portion arranged to deflect containers from the container supporting surface of the elevating members 5′ if the containers are misaligned thereon. This wedge-shaped portion tapers off in a circumferential direction towards the first receiving area 2′. In other words, the wedge-shaped portion points towards the first receiving area 2″. The wedge-shaped portion of the tertiary retaining means 10′ tapers both in a radial direction and in an axial direction, thus ending in a point at a position at approximately 9 o'clock on the rotatable plate 9′. As seen in FIG. 4b, the wedge-shaped portion tapers off at an angle α.sub.2 of approximately 20°.

(165) Looking at FIG. 7, it is shown that the device 1′ has a flange that is fixedly connected to the circumference of the rotatable plate 9′″ and which flange extends towards the second receiving area 3′. The second receiving area 3′″ is located behind the rotatable plate 9′. In other words, the flange extends from an outer periphery of the rotatable plate 9′ and backwards, beyond the back surface of the rotatable plate 9′. The flange is arranged to guide a container as it moves from resting on the container elevating elements 5′″ to sliding onto the second receiving area 3″.

(166) As the flange extends backwards from the rotatable plate 9′, it acts as a bridging surface between the container elevating members 5′″ and the second receiving area 3″. Thus, the risk of containers or other objects falling down behind the rotatable plate 9′″ as the containers are transported from the container elevating members 5′″ to the second receiving area 3′″ is reduced. The flange is arranged at an angle α.sub.6 relative to the rotatable plate 9′″, wherein this angle as is approximately 80°. Thus, the containers are caused to slide across the flange and down towards the second receiving area 3′″ and the conveyor belt 13′″ once the container elevating members 5′″ reach a container drop-off point.

(167) The device 1′″ further comprises a V-conveyor 14′″, i.e. a conveyor belt. The second receiving area comprises one end of this conveyor belt 14′″, the conveyor belt 14′″ being arranged at an angle relative to a horizontal projection of the first axis x. This angle is approximately 105°. Thus, the conveyor belt 14′″ extends from the second receiving area 3′″ and backwards, away from the front of the device 1′″ and the user.

(168) The conveyor belt 14′″ is a V-conveyor, and comprises two belts. One belt, the one that is located closest to the rotatable plate 9′″, is shorter than the other belt. This means that the conveyor belt 14′″ may be arranged closer to the rotatable plate 9′″ than what would have been possible if the two belts had been equally long. As the conveyor belt 14′″ is arranged at an angle relative the rotatable plate 9′″, having one band offset the other allows the conveyor belt 14′″ to be arranged closer to the transporting device. Thus, the amount of non-active bridging surfaces between the rotatable plate 9′″ and the second receiving area 3′″ is reduced.

(169) The conveyor belt 14′″ has a width that is approximately 65-70 mm, as measured in a direction that is perpendicular to a transporting direction of the conveyor belt 14′″ and that is parallel with the horizontal plane. This enables misaligned containers to more easily fall off the conveyor belt 14′″ on their own, without being forced to do so by means of e.g. a sorting device or sorting arrangement, Thus, a more efficient sorting of misaligned containers is achieved. Finally, the two belts of the conveyor belt 14′″ are arranged at an angle relative to each other. This angle is approximately 50°.

(170) Subsequent to the second receiving area 3′″, there is located an inspection area and a sorting station (not shown). Said inspection area may comprise inspection means for identifying a container, as is described in relation to any of the previous embodiments. Said sorting station may comprise pneumatic sorting means, such that after being identified by the inspection means, arranged along the direction of travel of the conveyor belt 14′″, the container may be sorted at a sorting station. This sorting station comprises a pneumatic sorter that is arranged after the inspection means, as seen in the direction of travel of the conveyor belt 14″. The pneumatic sorter is arranged to push invalid containers off the conveyor belt 14′″ by means of small bursts of gas. The sorting station may alternatively be of the type discussed in relation to the first, second or third embodiment of the invention.

(171) FIG. 8 is a perspective view of a front of a reverse vending machine comprising a closing device according to one exemplary embodiment of a fifth aspect of the present inventive concept, wherein the closing device is in an open state. The fifth aspect of the present inventive concept may be used with any type of bulk sorting reverse vending machine or vending machine comprising means for bulk sorting.

(172) The reverse vending machine 1 of FIGS. 8 and 10 comprises:

(173) a first receiving area arranged for simultaneously receiving and keeping a plurality of containers which are to be singulated;

(174) a first singulation transporting device comprising a container singulator, which also may be referred to as elevating member, for transporting individual containers from the first receiving area to a second receiving area,

(175) a second transporting device for transporting individual containers from the second receiving area to an inspection station, where the validity of the container is determined, and

(176) a front comprising an in-feed 100 for guiding a bulk of containers towards the first receiving area,

(177) wherein the front further comprises:

(178) a movable closing device 101 for closing the in-feed, which closing device is movable between an open state wherein the in-feed is open, and a closed state wherein the in-feed is closed,

(179) automatic locking device configured to lock the movable closing device in the closed state at the start of a container singulation session, and unlock the movable closing device at the end of the container singulation session.

(180) In FIG. 8 the movable closing device is arranged in the open state, and in FIG. 10 the movable closing device is arranged in the closed state. As can be seen in FIGS. 8 and 9 the movable closing device is arranged up stream of the in-feed, and is moved between the open and closed state by a translating non-rotational movement following the outside surface of the front. The direction of motion of the movable closing device is controlled by guides 102 attached to the front of the reverse vending machine; to which guides the movable closing device is attached.

(181) The size of the opening of the in-feed may be adapted to allow containers of different sizes and shapes to enter into the device 1 and to fulfill the requirements of the safety standard NS-EN 349:1992+A1:2008.

(182) Moreover, the distance between the opening and the singulation transporting device may be adapted to fulfill the requirement of the standard, ISO 13857:2008, Safety of machines.

(183) According to a further safety standard, ISO 13857:2008 of machines, the opening should comprise different safety arrangement for preventing injuries. For example, it can comprise a light curtain with a light beam which functions such that, when the device 1 is running, the device is immediately shut down when the light beam is broken.

(184) The infeed may comprise a tray which may be slightly tilted with respect to the horizontal plane in order to facilitate the containers to be forwarded to the first receiving area.

(185) The infeed 100 may be made of a plastic material, metal and/or wood.

(186) The infeed 100 may further comprise rims on both sides in order to retain the containers being forwarded towards the first receiving area and to prevent the containers from falling off the infeed upon being forwarded to the first receiving area.

(187) The tray may be provided with slits in order to handle loose objects, e.g. pieces of paper such as labels from containers, into which the loose objects can fall.

(188) Loose objects may fall onto a steep surface located below the infeed and be guided directly or via a funnel to a trash collector.

(189) The trash collector may, but need not, be the same as the trash collector or containers discussed above.

(190) The infeed may further comprise a conveyor belt in order to further facilitate transport of the containers from the tray towards the first receiving area. The conveyer belt may be arranged between the tray and the first receiving area of the device 1 and hence being adapted to the size of the infeed and the opening of the device.

(191) Such a conveyor belt may comprise rims on both sides in the longitudinal direction in order to prevent the objects from falling off from the conveyor and to retain the containers towards the first receiving area.

(192) The conveyor belt may be positioned substantially horizontal with respect to the horizontal plane.

(193) Alternatively, the infeed may comprise solely a tray or solely a conveyor belt.

(194) FIG. 9 is a perspective view of a front of a reverse vending machine illustrating an alternative embodiment in the open state. This embodiment is equal to the one shown in FIGS. 8 and 10, except that the movable closing device is attached to the front by means of hinges, to that the movable closing device may be rotated between an open and closed state. In the closed state the position of the movable closing device is equal to the one illustrated in FIG. 10.

(195) FIG. 12 is a perspective view of a front of a reverse vending machine illustrating an alternative embodiment in the open state. This embodiment is equal to the one shown in FIGS. 8 and 10, except that the movable closing device is moved between the open and closed state by a translating non-rotational movement, which movement follows a direction transverse or orthogonal to the front surface of the machine as illustrated by the double arrows. FIG. 11 shows this movable closing device in the closed state.

(196) FIG. 14 is a perspective view of a front of a reverse vending machine illustrating an alternative embodiment in the open state. This embodiment is equal to the one shown in FIGS. 8 and 10, except that the movable closing device is moved between the open and closed state by a translating non-rotational movement, which movement follows a direction transverse or to the front surface of the machine as illustrated by the double arrows. The direction of motion crosses the front surface of the machine at an angle between 5° and 80°, or between 10° and 60°. FIG. 13 shows this movable closing device in the closed state.

(197) In the embodiments illustrated in FIGS. 8-14 the movable closing device is arranged up stream of the infeed.

(198) FIG. 15 is a perspective view of a front of a reverse vending machine illustrating an alternative embodiment in an intermediate state, i.e. in a state between the open state and the closed state. This embodiment is equal to the one shown in FIGS. 8 and 10, except that the movable closing device is flat and arranged within the infeed of the device; i.e. it is arranged downstream of the opening of the infeed and up-stream of the end of the in-feed. The movable closing device is moved between the open and closed state by a translating non-rotational movement, which movement may follow a direction parallel to the front surface of the machine as illustrated by the double arrows. When the movable closing device is arranged in the closed state, it fully covers the passage formed by the infeed.

(199) FIG. 16 is a perspective view of the front illustrated in FIGS. 13 and 14, as seen from the back of the front. Here an optional funnel is provided, for guiding the containers towards the first receiving area. Moreover, an optional back of the infeed 100′ is shown.

(200) FIG. 18 illustrates one exemplifying sequence of steps that may be used for controlling the in-feed of the reverse vending machine in accordance with the invention. First a bulk of objects are received through the in-feed of the reverse vending machine, 1001. Thereafter the singulation process is started, 1010, or the movable closing device is closed and locked, 1020. That the singulation process is started before the closing of the movable closing device enables for the user to enter so many containers that a predetermined fill-level of the machine is reached and no more containers can or should be inserted (e.g. because the machine signals that to the user), await that some of the containers provided to the machine are processed so that the fill-level of the machine decreases, where after the user may add more containers into the machine. When the user has provided all his/her containers into the machine, 1011, the movable closing device is closed (manually or automatically), 1020, and automatically locked, 1021, so that the user may leave the machine while the machine continues to process the containers. Once the singulation process has been completed, 1012, the moveable closing device is unlocked.

(201) Alternatively, the movable closing device is closed and optionally locked, 1020 and 1021, before, or at the same time as, the singulation process starts, 1010, this has the advantage that the user is protected from injuries caused by moving parts inside the machine, which parts are active at the singulation process; it also has the advantage of reducing noise caused by the singulation process during the whole singulation process.

(202) According to one exemplifying embodiment, the in-feed is open in the idle state, i.e. when the machine is waiting for a new user. Alternatively, the in-feed is closed in the idle state.

(203) According to one method of operating a reverse vending machine for singulation of used beverage or food containers received in bulk into individual objects, the method comprising the steps of: providing a reverse vending machine having a first receiving area arranged for simultaneously receiving and keeping a plurality of containers which are to be singulated; an in-feed; a first singulation transporting device for individual transporting of containers from a first receiving area to a second receiving area; a movable closing device for closing the in-feed, which closing device is movable between an open state wherein the in-feed is open, and a closed state wherein the in-feed is closed; receiving a bulk of used beverage or food containers through the infeed; receiving and keeping the bulk of used beverage or food containers at the a first receiving area; individual transporting of containers from the first receiving area to a second receiving area, protecting the user of the reverse vending machine,

(204) wherein the step of protecting the user comprises the steps of: providing an automatic locking device, providing an activation signal to the automatic locking device when the moveable closing device is to be locked, which activation signal is issued based on one or two or all of the following: the number of objects received at the first receiving area, the rate at which containers or objects are received at the first receiving area, the position of the movable closing device, providing a deactivation signal to the automatic locking device when the moveable closing device is to be unlocked, which activation signal is issued based on one or both of the following: the number of objects or containers present in the first receiving area, and the container transportation rate from the first receiving area to the second receiving area,

(205) or comprises the step of: preventing a start of the individual transporting of containers from the first receiving area to a second receiving area while the moveable closing device is in an open state,

(206) or comprises the step of: halting the first singulation transporting device and discontinuing the individual transporting of containers from the first receiving area to a second receiving area in response to a movement of the movable closing device to an open state.

(207) The step of receiving and keeping the bulk of used beverage or food containers at the first receiving area may further comprises the step of continuously single out individual containers from the bulk of containers in the first receiving area, and transporting the individual container from the first receiving area to a second receiving area which second receiving area is arranged at a higher vertical level.

(208) FIG. 19 illustrates one example of how a signal may be directed in a reverse vending machine according to the invention. Here, a singulation monitoring device 2605, which may inform a control circuitry 2501 about e.g. the fill level of the machine or the first receiving area, the amount of objects received at the first receiving area, the rate at which containers or objects are received at the first receiving area, the position of the movable closing device, the amount of objects or containers present in the first receiving area and/or the container transportation rate from the first receiving area to the second receiving area. Based on this information the control circuitry 2501 may issue a closing signal which is sent to the moveable closing device 2101, whereupon the movable closing device is closed automatically, i.e. non-manually. Additionally or alternatively, the control circuitry may issue an opening signal which is sent to the moveable closing device, whereupon the movable closing device is opened automatically, i.e. non-manually. Additionally or alternatively, based on this information the control circuitry may issue an activation signal which is sent to the automatic locking device 103, whereupon the automatic locking device 103 locks the movable closing device in the closed state. Additionally or alternatively, the control circuitry may issue a deactivation signal which is sent to the automatic locking device 103, whereupon the automatic locking device 103 unlocks the movable closing device. Additionally or alternatively, the control circuitry may issue a signal to the first singulation transporting device when the movable closing device is open. Thereby, the first transporting device may be prevented from starting the individual transporting of containers from the first receiving area to the second receiving area. Additionally or alternatively, during operation of the reverse vending machine, the control circuitry may issue a signal to the first singulation transporting device if the movable closing device is opened. Thereby, the first singulation transporting device may be halted and the individual transporting of containers from the first receiving area to the second receiving area may be discontinued.

(209) The invention has been described with reference to some detailed examples, however the skilled person realizes that a number of modifications of the embodiments described herein are possible without departing from the scope of the invention, which is defined in the appended claims. For example, the design of the transportation device including the container elevating members may be scaled or given different designs depending on e.g. the material, size, shape and weight of the containers that the singulation device is to be able to handle. Guided by this description and possibly in combination with some testing the person skilled in the art will be able to find a suitable design. Furthermore, the reverse vending machine of the present inventive concept may have an alternative configuration and may e.g. comprise alternative means for singulating used beverage or food containers, such as those disclosed in US 2012118700 or EP 2014/052546. When using the reverse vending machine of the present inventive concept with the singulation transporting device of EP 2014/052546, the inlet may guide the containers towards the middle portion of the rotating surface, i.e. towards a first receiving area, where the containers are then singulated by means of the device disclosed in EP 2014/052546.