Container having a supporting structure between a closure membrane and lid

Abstract

Container having support for a membrane (30) which is sealed (by sealing means or adhesive bonding) onto the inner side (41) of the container wall (40) of the container, particularly while the container is being filled with contents or by virtue of a positive pressure being introduced. The intention is to relieve the sealing of the membrane of loading, wherein the action of force during the filling operation from beneath is advantageous or easily withstandable. For this purpose, the container is provided with the container wall (40), a container opening (2), a lid (10), the membrane (30) and a supporting structure (20). The lid (10) closes the container opening (2). A portion of a membrane collar (31) of the membrane (30) is fastened on a portion of the inner side (41) of the container wall (40), a fastening region (33) therefore being formed. The supporting structure (20) has a supporting portion (21) and a carrying portion (22). The supporting portion (21) is assigned to the membrane (30) and the carrying portion (22) is assigned to the lid (10).

Claims

1. A container comprising a container wall, a container opening, a lid, a membrane, and a support structure, wherein: the lid closes the container opening; an outer portion of the membrane is directly attached to a portion of an inner side of the container wall, forming an attachment region; the support structure comprises a support portion and a bearing portion, wherein the support portion is associated with the membrane and the bearing portion is associated with the lid, the support structure comprises at least one predetermined breaking point, configured as material weakening designed to break when a consumer opens the lid, to separate lid and support structure, and the lid and support structure are formed integrally.

2. The container according to claim 1, wherein the support portion contacts the membrane.

3. The container according to claim 1, wherein the support portion does not contact the membrane.

4. The container according to claim 1, wherein the support portion contacts the membrane such that a force is exerted on the membrane by the support portion.

5. The container according to claim 1, wherein a gap is present between the support portion and the outer portion of the membrane.

6. The container according to claim 5, wherein the gap has a length of less than 20 mm.

7. The container according to claim 1, wherein the support portion is annular in shape.

8. The container according to claim 1, wherein the support portion is cohesively connected to the bearing portion.

9. The container according to claim 1, wherein the bearing portion is connected to the lid.

10. The container according to claim 1, wherein the bearing portion comprises a bearing element that is bar-shaped.

11. The container according to claim 10, wherein the lid comprises a snap element into which an upper portion of the bearing element is snapped.

12. The container according to claim 1, wherein the membrane comprises a membrane bottom having a top side and the support portion comprises a support-portion bottom side, wherein an axial height between an axial reference height and the support-portion bottom side is less than or equal to an axial height between the axial reference height and the top side of the membrane bottom.

13. The container according to claim 12, wherein the axial reference height corresponds an axial height of the lid or to an axial height of a container edge of the container.

14. The container according to claim 1, wherein a force acting on the membrane in the axial direction is partially accommodated by the support portion.

15. The container according to claim 1, wherein a force acting on the membrane in an axial direction is diverted by the support portion thereby a resulting force acting in the attachment region between the membrane collar outer portion of the membrane and the portion of the inner side of the container having a shearing component that is greater than a peeling component.

16. The container according to claim 1, wherein an object is disposed between the lid and the membrane.

17. A method for manufacturing a filled container, comprising the steps of: providing a container of claim 1, filling a solid or liquid filling material into the opening provided opposite to the lid; and closing the opening provided opposite to the lid, thereby providing the filled container.

18. A method for filling a container closed by a foil membrane on one side, comprising the steps of: providing a container of claim 1; and filling a filling material into the opening provided opposite to the lid, the filling material falling on the membrane, providing an emerging force in the membrane, wherein the support portion of the support structure diverts the emerging force to the attachment region mainly as a shearing force component.

19. The method according to claim 17, wherein the container is a metallic container.

20. The method according to claim 18, wherein the container is a metallic container.

21. The container according to claim 1, wherein the container is a metallic container, and wherein the container wall is a metallic container wall.

22. A container comprising a container wall, a container opening, a lid, a membrane, and a support structure, wherein: the lid closes the container opening; an outer portion of the membrane is directly attached to a portion of an inner side of the container wall, forming an attachment region; the support structure comprises a support portion and a bearing portion, wherein the support portion is associated with the membrane and the bearing portion is associated with the lid, wherein the support portion is annular in shape, wherein the support portion comprises an outer support ring and an inner support ring, and wherein the outer and inner support rings are connected by a plurality of support bars.

23. The container according to claim 22, wherein the plurality of support bars are distributed in a circumferentially equidistant manner.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The embodiments of the invention are illustrated by means of examples and are not disclosed in a way that transfers or incorporates limitations from the Figures into the patent claims. The examples are to be understood as examples even if the terms for example, especially or e.g. are not used in all places. The description of an embodiment or a design is not be understood such that there is no other one or that other possibilities are excluded if only one example is presented. These specifications apply to the entire description that follows.

(2) FIG. 1 shows a side view of a container 1 in axial cross-section.

(3) FIG. 2 schematically shows the section A-A of FIG. 1, without showing the spoon 50 of FIG. 1.

(4) FIG. 3 shows a support structure 20 in a perspective view.

(5) FIG. 3a shows a support structure 120 in a perspective view.

(6) FIG. 3b shows a support structure 220 in a perspective view.

(7) FIG. 3c shows a support structure 320 in a perspective view.

(8) FIG. 4 shows a detailed schematic view of the attachment region 33 which is formed by attaching the membrane collar 31 of the membrane 30 to the inner side 41 of the container wall 40.

(9) FIG. 5 shows a detailed sectional view of an upper region of the container 1.

(10) FIG. 6 shows a container 1 in an axial sectional view.

DETEAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(11) FIG. 1 shows a container 1 comprising a lid 10, a support structure 20, a membrane 30 and a container wall 40. The container 1 comprises a filling opening 60 at its lower end (in the negative z-direction). The filling opening 60 is located at the end on the side of the container 1 that is opposite to the lid 10. For example, a food manufacturer or food packer can fill a foodstuff into the open space formed by the membrane 30 and the container wall 40 through the filling opening 60.

(12) During the filling operation of the filling material, the container 1 is typically rotated by 180? with respect to the representation in FIG. 1 so that the side of the container 1 terminating in the filling opening 60 is at the top and the side of the container 1 terminating in the lid 10 is at the bottom. Thus, a food manufacturer or food packer can let the filling material drop or trickle or flow in (fill) the space that is accessible through the filling opening 60. During the filling operation, a force F.sub.fill acts on the membrane 30 due to the weight of the filling material and the filling material hitting the membrane 30 (the filling material can be filled into the container from a considerable height), wherein the force F.sub.fill mainly acts on the membrane bottom 32 of the membrane 30.

(13) The membrane 30 comprises a membrane collar 31 that is connected to an inner side 41 of the container wall 40. Typically, the membrane collar 31 has an axial extension or height (z-direction) of less than 20 mm, preferably less than 15 mm.

(14) Preferably, the connection of the membrane collar 31 to the inner side 41 of the container wall is completely circumferential so that two spaces are provided above and below the membrane 30 or the membrane bottom 31 that are separated from each other in a fluid-tight manner, wherein the spaces can be open.

(15) The (circumferential and axially extending) region in which the membrane collar 31 is connected to the inner side 41 of the container wall 40 forms an attachment region 33.

(16) Typically, the attachment of the membrane is formed by adhesive bonding or sealing, as also described above. The attachment region 33 does not have to occupy the entire height of the axial extension of the membrane collar 31, rather the axial height or extension of the attachment region 33 is often less than the axial extension of the membrane collar 31. The axial extension of the attachment region 33 can be less than 15 mm, preferably less than 10 mm, particularly preferably less than 8 mm.

(17) As discussed in detail above, the force F.sub.fill acting on the membrane 30 due to the filling operation of the filling material would act in the attachment region 33, for example, as a force that is unfavorable to resist by an adhesion and has a large peeling component. By arranging the support structure 20 in the container 1, the force F.sub.fill acting on the membrane 30 during the filling operation is, at least in part, diverted such that a force acts in the attachment region, the peeling component of which is reduced with respect to a peeling component of the force that would act in the attachment region of a container 1 without a support structure (under otherwise equal conditions). In addition, the force F.sub.fill acting on the membrane 30 is, in part, transferred by the support structure 20.

(18) The support structure 20 comprises a support portion 21 associated with the membrane 30 and a bearing portion 22 associated with the lid 10. The force F.sub.fill acting on the membrane 30 is diverted and/or transferred by the support portion 21 since the membrane bottom 32 contacts the support portion at least during the filling operation of the filling material and the support structure 20 is connected to the lid 10 via the bearing portion 22.

(19) In the embodiment of FIG. 1, the support portion 21 is composed of an outer support ring 21a, wherein the support portion 21 can comprise further elements in other embodiments. The typically flexible membrane 30 can be deformed towards the support portion 21 of the support structure 20 by the filling operation.

(20) In FIG. 1, the lid 10 is designed as a slip lid and is fixed to a rolled edge 42, wherein the rolled edge 42 is formed at the upper end (in the positive z-direction) of the container wall 40. The bearing portion 22 of the support structure 20 can transmit a force transferred by the support portion 21 to the lid 10, wherein the transmitted force can be accommodated by the attachment of the lid 10 to the rolled edge 42. Furthermore, the diversion of force by the support portion 21 is enabled by associating the bearing portion 22 to the lid 10 and fixing the lid 10 to the rolled edge 42.

(21) In FIG. 1, the bearing portion 22 comprises three bearing elements 23, 23, 23, wherein only two bearing elements 23, 23 are visible owing to the sectional view. A perspective view of the support structure 20 comprising the bearing elements 23, 23, 23 is shown in FIG. 3 which is described in detail further below.

(22) The bearing elements 23, 23, 23 are bar-shaped and include a spherical portion 24, 24, 24 at the upper end (in the positive z-direction) in each case, wherein again only two spherical portions 24, 24 are visible in FIG. 1 owing to the sectional view.

(23) Snap elements 11, 11, 11 are arranged at the bottom side of the lid 10 (in the negative z-direction) of which only two snap elements 11, 11 are visible in FIG. 1. The snap elements 11, 11, 11 are formed such that at least the spherical portions 24, 24, 24 can snap into them, thereby providing a (releasable) connection of the support structure 20 to the lid 10.

(24) The lid 10 closes a container opening 2 of the container 1 that is located (at the end) on the side of the container 1 opposite to the filling opening 60. Typically, the container opening 2 serves the purpose of enabling a consumer to reach into the container 1 when the container 1 is filled with a filling material and the filling opening 60 is closed (and the lid 10 is removed).

(25) After opening the filled container 1 by removing the lid 10, wherein the filling opening 60 is closed, a consumer can withdraw the support structure 20 from the space above the membrane 30 (where the support structure 20 is arranged). Typically, the support structure 20 is a disposable article which is disposed of by the consumer after withdrawal. This is also because the function of the support structure 20 primarily comes into effect during the filling operation of the filling material, i.e. before a consumer can purchase the filled container.

(26) A spoon 50 is disposed in the space which has become accessible by opening or removing the lid 10 (in which the support structure is or was arranged). The consumer can reach into the container opening 2 to arrive at the spoon 50.

(27) The consumer can remove the membrane 30 or a portion of the membrane 30, for example, by a pull tab or a tear tab provided at the membrane 30 so that the filling material is accessible to the consumer. The filling material can be removed by using the spoon 50.

(28) Generally, cutlery can be disposed in the space above the membrane 30 (in the positive z-direction) instead of the spoon 50. Other objects can also be disposed there, such as e.g. an advertising medium or a sachet (bag) including spices.

(29) The container opening 2 is preferably re-closable by the lid 10.

(30) The lid 10 can be a press-in lid.

(31) In FIG. 1, a gap s is provided between the support portion 21 of the support structure 20 and the membrane collar 31 of the membrane 30. The length of the gap s in the radial direction (r-direction) is preferably small, as described above.

(32) The membrane 30 can be attached to the inner side 41 of the container wall 40 in various axial height positions. The distance of the membrane 30, which is determined by the axial height of the membrane bottom 32, to the upper end of the container 1 (in the positive z-direction) is preferably less than 70% of the total container height, particularly preferably less than 55% of the total container height, even more preferably less than 40% of the total container height, most preferably less than 30% of the total container height.

(33) Two or more than two membranes 30 can be arranged in the various height positions described above.

(34) FIG. 2 schematically shows the section A-A of FIG. 1, in which the proportions of the elements shown in FIG. 2 do not always correspond to those of FIG. 1 and the spoon 50 of FIG. 1 is not illustrated. Moreover, the gap s of FIG. 1 is 0 (zero) so that the support portion 21 (outer support ring 21a) of the support structure 20 radially abuts the membrane collar 31 of the membrane 30.

(35) The membrane collar 31 is connected to the inner side 41 of the container wall 40 in a completely circumferential (and fluid-tight) manner. The outer support ring 21a of the support structure 20 is annular in shape.

(36) Three bearing elements 23, 23, 23 are cohesively connected to the outer support ring 21a. As shown in FIG. 1 and described with respect to the third bearing element 23, the bearing elements 23, 23, 23, as components of the bearing portion 22, are connected to the lid 10 such that a force acting on the outer support ring 21a (support portion 21) via the membrane 30 can be partially accommodated by the connection of the lid 10 to the container wall 40 or, as in FIG. 1, to the rolled edge 42.

(37) Moreover, the connection of the lid 10 to the container wall 40, as is the case when using a press-in lid, or to the rolled edge 42 provides the counterforce or retention force that is required to enable a diversion of the force acting on the membrane 30 (or on the membrane bottom 32) to the attachment region 33 as a force that can be accommodated more favorably and has an increased shearing component (reduced peeling component).

(38) The bearing elements 23, 23, 23 are arranged at the (circular) annular outer support ring 21a in a circumferentially equidistant manner.

(39) The outer support ring 21a can also have an oval shape (with or without an axis of symmetry) or a polygon shape. Preferably, the shape of the outer support ring 21a corresponds to the shape of the cross-section (perpendicular to the container longitudinal axis) of the container wall 41 in the portion of the container wall 41 to which to the membrane 30 is attached.

(40) More than three bearing elements can be arranged at the support portion 21, for example, at the outer support ring 21a. In particular, four, five or more than five bearing elements can be arranged at the support portion 21. A same number of snap elements corresponding to the number of bearing elements can be arranged at the lid 10. The more than three bearing elements are preferably distributed in a circumferentially equidistant manner.

(41) Similarly, one bearing element can be arranged at the support portion 21, wherein the bearing element can be formed completely circumferentially (in the shape of a hollow cylinder). The upper portion of the completely circumferential support portion 21 can be annular in shape. A completely circumferential snap element can be arranged at the lid 10.

(42) Two bearing elements are also possible.

(43) A support structure 20, as shown in FIG. 1 and FIG. 2, is shown in perspective view in FIG. 3, wherein the proportions of the elements shown in FIG. 3 do not always correspond to the proportions of the elements of the support structure of FIG. 1 and FIG. 2.

(44) The support structure 20 in FIG. 3 comprises an outer support ring 21a as a support portion 20 and three bearing elements 23, 23, 23 which are cohesively connected to the outer support ring 21a. The outer support ring 21a has a rectangular cross-section.

(45) The bearing elements 23, 23 23 are bar-shaped and have a circular cross-section. The bearing elements 23, 23, 23 comprise a spherical end portion (upper portion of the bearing elements 23, 23, 23).

(46) FIG. 3a shows another embodiment of a support structure 120 comprising a support portion 121 and a bearing portion 122. The support portion 121 comprises an outer support ring 121a, an inner support ring 128 and a plurality of support bars 127, 127, 127, 127, 127 that are distributed in a circumferentially equidistant manner. The inner support ring 128 is connected to the outer support ring 121a by the support bars 127, 127, 127, 127, 127.

(47) Due to this design of the support portion 121 of the support structure 120, a membrane 30 can be supported flat. Thus, as described above, forces acting on the membrane 30 (membrane bottom 32) can be transferred to the connection of the lid 10 to the container wall 40 or to the rolled edge 42 to a greater extent than is the case with the support structure 20 of FIG. 3.

(48) This embodiment further comprises bearing elements 123, 123, 123 having spherical upper portions 124, 124, 124 which are analogous to the bearing elements 23, 23, 23 having spherical upper portions 24, 24, 24 of the embodiment of FIG. 3.

(49) FIG. 3b shows an embodiment of a support structure 220 comprising a support portion 221 and a bearing portion 222. The support portion 221 comprises an outer support ring 221a, an inner support ring 228 and a plurality of support bars, 227, 227, 227, 227, 227. The support portion 221 of this embodiment is analogous to the support portion 121 in FIG. 3a.

(50) The bearing portion 222 comprises three bearing elements 223, 223, 223 which are connected to the outer support ring 221a and a bearing ring 229. The bearing ring 229 is (circular) annular in shape and has a rectangular cross-section. The snap element or snap elements of the lid 10 is/are adapted accordingly so that the bearing ring 229 can snap into one or a plurality of snap elements of the lid 10. The bearing ring 229 can also have a circular cross-section.

(51) Preferably, the bearing ring 229 has the same diameter as the outer support ring 221a. The bearing ring 229 and the outer support ring each span a plane, wherein the planes can be parallel to each other.

(52) FIG. 3c shows a further embodiment of a support structure 320 comprising a support portion 321 and a bearing portion 322. The support portion 321 is composed of an outer support ring 321a. The bearing portion 322 comprises three bearing elements 323, 323, 323 which are connected to the outer support ring 321a and a bearing ring 329. The bearing portion 322 is analogous to the bearing portion 222 in FIG. 3c.

(53) The bearing elements 23, 23, 23; 123, 123, 123; 223, 223, 223, 323, 323, 323 have a length (extension along the container longitudinal axis) of preferably at most 100 mm, more preferably at most 80 mm, even more preferably at most 50 mm.

(54) FIG. 4 shows, by means of a detailed view of a cutout that shows a connection of the membrane 30 to the container 40, how a diversion of force can be performed by a support structure 20.

(55) When the filling material is filled into the filling opening 60 of a container 1 (cf. FIG. 1), the filling material can hit the membrane bottom 32, causing a force F.sub.fill to act on the membrane 30. The membrane 30 is connected to the inner side 41 of the container wall 40 via a membrane collar 31. In the embodiment of FIG. 4, the connection is an adhesion, wherein the attachment region 33 comprises an adhesive layer.

(56) A support structure 20 is arranged on the side of the membrane 30 that is opposite to the (later) introduced filling material, wherein the support portion 21 abuts the membrane bottom 32. Due to the support structure 20, the force F.sub.fill acting on the membrane 30 (membrane bottom 32) can be diverted to the attachment region 33 such that a resulting force F.sub.res acts there. The resulting force F.sub.res in the attachment region 33 must be capable of being accommodated such that damage to the connection between the membrane collar 31 and the inner side 41 of the container 40 does not compromise the tightness of the connection. In the case of the adhesion in FIG. 4, the resulting Force F.sub.res is compensated by a force F.sub.adh provided by the adhesion and can be accommodated accordingly.

(57) As a result of the diversion, the shearing component (action of force in parallel with the attachment region 33) of the resulting force F.sub.res is greater than the shearing component of the force that would act in the attachment region if the support structure 20 was not used. For the sake of clear representation, the force F.sub.res illustrated in FIG. 4 only has a shearing component, whereas, in reality, also a peeling component can occur which would lead to the resulting force F.sub.res not being in parallel with the attachment region.

(58) Even if the diversion of force does not result in a force that only has a shearing component, the increase in the shearing component leads to the requirements to quality of the adhesion being reduced or an improved tightness being able to be ensured while maintaining the same quality of the adhesion.

(59) A container 1 comprising a lid 10, a support structure 20 and a membrane 30 is shown in FIG. 5. The membrane 30 is in the initial state described above. The membrane 30 comprises a membrane bottom 32 having a membrane-bottom top side 35 and a membrane collar 31. The lid 10 comprises a lid bottom side 12. The support structure 20 comprises a support portion 21 having a support-portion bottom side 25.

(60) An axial (in the z-direction) distance H.sub.1 (also referred to as length or height) is formed between the lid bottom side 12, as a reference point, and the support-portion bottom side 25. An axial (in the z-direction) distance H.sub.2 (also referred to as length or height) is formed between the lid bottom side 12, as a reference point, and the membrane-bottom top side 35. In FIG. 5, the length H.sub.1 is less than the length H.sub.2.

(61) Thus, no pressure is exerted on the membrane bottom 32 of the membrane 30 when the membrane 30 is in its initial state. When a force is exerted on membrane bottom 32 in the positive z-direction, the membrane bottom 32 can be deformed towards the support-portion bottom side 25 so that the force acting on the membrane bottom 32 can be diverted and/or transferred by the support structure 20.

(62) In general, the filling material which is to be introduced or is introduced into the container 1 into the space below the membrane 30 can be a foodstuff, especially a powdery foodstuff. The space below the membrane 30 is the space that is defined, at least on one side, by the membrane 30, but does not comprise the support structure 20.

(63) The protective gas preferably comprises nitrogen, in particular, the protective gas comprises nitrogen having a concentration of more than 80 vol % (proportionate to the composition of the entire protective gas).

(64) In FIG. 6, a container 1 is shown that is similar to the container of FIG. 1, wherein the support structure 20 is formed integrally or in one-piece with the lid 10. The lid 10 is cohesively connected to the support structure 20, especially to the bearing elements 23, 23, 23 (bearing element 23 is not shown owing to the sectional view).

(65) In this embodiment, one predetermined breaking point 71, 71, 71 each is provided at one of the bearing elements 23, 23, 23, wherein the predetermined breaking point 71 provided at the bearing element 23 is not visible owing to the sectional view. In the representation of FIG. 6, the predetermined breaking points 71, 71, 71 are designed as slittings in the bearing elements 23, 23, 23, wherein the slitting causes a material weakening to mechanical stress, as compared to non-slitted bearing elements 23, 23, 23.

(66) A separation of the support structure 20 from the lid 10 is to be expected at the positions of the predetermined breaking points of the bearing elements 23, 23, 23, when a consumer opens the lid 10 and removes the lid 10 from the container 1 during opening using a sufficiently large force and in a way deviating from an exclusively axial removal so that the support portion 21 abuts the inner side 41 of the container wall 40.

(67) Predetermined breaking points can also be designed as cross-sectional taperings in bearing elements or by using a portion in the bearing elements made of a material that is less mechanically resistant than the material of the residual portions of bearing elements.

(68) Besides, the container of the embodiment of FIG. 6 corresponds to the embodiment of FIG. 1 and the disclosure of the embodiment of the Figure also applies to the embodiment of FIG. 1.

(69) All support structures disclosed herein can be used in the container 1 of FIG. 6.