Dispenser for rolls

Abstract

Dispenser includes housing for at least two rolls of tissue paper, access opening in housing, and closure selectively closing a portion of access opening. Closure includes body, first wall movably connected to body at first edge of first wall; and second wall movably connected to body at first edge of second wall. First and second wall are urged toward each other to respectively position second edges of first and second walls opposite to first edges in a blocking position in which sliding of closure into first or second position is blocked until a predetermined amount of paper of second or first roll, respectively, has been dispensed. Closure includes first and second spring urging first and second walls, respectively, toward each other, spring force of first and second springs being configured to automatically return closure into first or second position, respectively, when sliding of the closure into first or second position, respectively, is blocked.

Claims

1. A dispenser for rolls of tissue paper, comprising: a housing for accommodating at least two of said rolls; an access opening defined in said housing for allowing access to the rolls; and a closure for selectively closing a portion of the access opening, the closure being slideably mounted to the housing between a first position closing a first portion of the access opening preventing access to a first roll of said rolls and a second position closing a second portion of the access opening preventing access to a second roll of said rolls, wherein the closure comprises: a body; a first wall having opposed first and second edges and being movably connected to the body at the first edge of the first wall; a second wall having opposed first and second edges and being movably connected to the body at the first edge of the second wall; a first spring urging the first wall toward the second wall; and a second spring urging the second wall toward the first wall, wherein the first and second wall are urged toward each other to respectively position the second edges of the first and second walls in a blocking position in which sliding of the closure into the second position is blocked until a predetermined amount of paper of the second roll has been dispensed and in which sliding of the closure into the first position is blocked until a predetermined amount of paper of the first roll has been dispensed, wherein spring force of the first and second springs is configured to automatically return the closure into the first position when sliding of the closure into the second position is blocked and to automatically return the closure into the second position when sliding of the closure into the first position is blocked.

2. The dispenser according to claim 1, wherein the first and second wall each comprises a bump adjacent to the second edge, the bump of the first wall protruding toward the second wall and the bump of the second wall protruding toward the first wall.

3. The dispenser according to claim 2, wherein the first and second walls have a concave portion from the first edges toward the second edges and a convex portion adjacent the second edges, respectively, wherein inner surfaces of the bumps facing each other are continuous with the concave portions, respectively.

4. The dispenser according to claim 1, wherein a first end of the first spring is connected to the first wall between the first and second edges of the first wall and a second end of the first spring is connected to the body, and wherein a first end of the second spring is connected to the second wall between the first and second edges of the second wall and a second end of the second spring is connected to the body.

5. Dispenser according to claim 4, wherein each wall comprises a support protrusion supporting the second ends of the first and second springs, the support protrusions protruding away from the first and second walls in a direction along an axis of rotation of the first and second walls, the support protrusions operating as a stop respectively limiting the rotational movement of the first and second walls toward each other.

6. The dispenser according to claim 4, wherein the first and second springs extend in the blocking position of the first and second walls along the sliding direction of the closure.

7. The dispenser according to claim 1, wherein the body comprises a gradually increasing rib extending along preferably the axis of rotation of the first and second walls.

8. The dispenser according to claim 7, wherein the rib connects at its highest position to a back wall of the body.

9. The dispenser according to claim 7, wherein the rib is located at a center between the axis of rotation of the first and second walls on the body.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the drawings:

(2) FIG. 1 shows a front view of a dispenser according to an embodiment with a lid being removed;

(3) FIG. 2A shows a perspective front view of the closure in FIG. 1;

(4) FIG. 2B shows a perspective back view of the closure in FIG. 1;

(5) FIG. 3 shows a front view of the dispenser of FIG. 1 in which sliding of the closure is prevented by a completely non-dispensed roll;

(6) FIG. 4 shows a front view of the dispenser of FIG. 1 in which sliding of the closure is prevented by a partly non-dispensed roll;

(7) FIG. 5 shows a front view of the dispenser of FIG. 1 in which sliding of the closure is permitted because the roll is substantially dispensed; and

(8) FIG. 6 shows a front view of the dispenser of FIG. 1 with the closure being slid to close the access opening in a portion corresponding to the substantially dispensed roll.

DESCRIPTION OF PARTICULAR EMBODIMENTS

(9) The dispenser shown in the drawings includes a housing 10 which is shown in the drawings with the lid (not shown) being removed.

(10) In the drawings, the housing 10 is configured for accommodation of two rolls 1, 2. For this purpose, the housing has two axes 13 connected to the housing 10, particularly its back wall 11. In the present embodiment, the dispenser is configured for so-called coreless rolls. Coreless rolls, such as those described in EP 1 782 722 A1, consist of a rolled tissue paper web only. The center of the roll may be subjected to water spraying, wherein the water may contain starch. Thereby, the roll can frictionally be engaged with the axis 13. To enable rotation of the rolls, the axes 13 are rotatably connected to the housing and rotate together with the roll. In an alternative embodiment, it is, however, also conceivable to configure the dispenser for accommodation of two rolls having a core as known from U.S. Pat. No. 5,265,816.

(11) In the drawings, the housing 10 further has an access opening 14 defined in a bottom wall 15 of the housing 10. Moreover, the housing 10 is separated into two compartments 16, 17, one for each roll 1, 2 by a partition 18 in the center of the housing 10. Thereby the access opening 14 is separated into a first portion 19 corresponding to the first roll 1 and a second portion 20 corresponding to the second roll 2.

(12) The dispenser of FIG. 1 further includes a closure 21 slidably supported by the housing 10. The closure 21 includes a body 22.

(13) The body 22 is translationally guided in the housing 10 for sliding of the closure 21 along the guide. For this purpose, a back wall 23 of the body 22 has at its lower end a U-shaped or bend portion 24 being bent away from the body 22 toward the back wall 11 of the housing 10 forming a groove 25 (see FIGS. 2A and 2B). The groove 25 is engaged with a lower end 26 of the back wall 11 of the housing 10 as shown in FIG. 1. Further, the body 22 has on its back wall 23 a rib 27 protruding from the back wall 23 toward the back wall 11 of the housing 10 resting with its lower surface 28 on a protruding surface 29 protruding from the back wall 11 of the housing 10. Finally, an upper end 30 of the back wall 23 engages with a not shown groove formed in a protrusion protruding from the back wall 11 of the housing 10 toward the back wall 23 of the body 22.

(14) The body 22 further includes a handle 32 which may be gripped by a user to slide the closure 21 along the translational guide.

(15) Moreover, the body 22 has two walls, a first wall 33 and a second wall 34. The walls 33, 34 are connected to the body 22 at a first edge 39 being rotatable about a first axis of rotation 35 and a second axis of rotation 36, respectively. Each of the walls 33, 34 is urged by a tension spring 45 about the axis of rotation 35, 36 so that the walls 33, 34 are urged toward each other.

(16) Each of the walls 33, 34 have a concave portion 37 extending from the first edge 39 to a second edge 40 opposite to the first edge 39. The concave portion 37 is concave toward the inside of the compartments 16, 17, respectively, that is toward the rolls 1, 2 accommodated in the housing 10 of the support axis 13. Further, each of the walls 33, 34 has a convex portion adjacent the second edge 40 so that each wall 33, 34 is flared at the second edge 40. This enables that the second edge 40 extends away from the outer circumference 41 of the rolls 1, 2, thereby closing the compartments 16, 17 (in cooperation with the partition 18 and the substantially horizontal walls 42 at the respective side ends of the housing 10 of the dispenser). Thus, the closure 21 with the body 22 and the walls 33, 34 closes one of the compartments 16, 17 depending on its position, so as to prevent access to the respective rolls 1, 2 via the access opening 14, thereby avoiding soiling of the protected non-accessible roll and also preventing dispensing paper from this roll.

(17) Each of the walls 33, 34 has a support protrusion 43 disposed at a respective end of the walls 33, 34 as seen in a direction along the axis of rotation 35, 36. The support protrusion also serves as a stop interfering with the ends of the back wall 23 of the body 22 as shown in FIG. 2B thereby limiting the rotational movement of the walls 33, 34 around the rotational axis 35, 36 toward each other. Additionally, the support protrusions 43 serve as supports or holding structures for attaching second ends 44 of tension springs 45. For this purpose, the support protrusions 43 have a hole into which the second ends 44 of the tension springs 45 are hooked in, respectively.

(18) The first end 46 of the tension springs 44 are connected to the back wall 23 of the body 22. For this purpose, a protruding rib 47 is provided having two holes into which the respective first ends 46 of the tension springs 45 are hooked in. The tension springs 45 urge the walls 33, 34 toward each other about the respective rotational axes 35, 36. As previously mentioned, this rotational movement is limited by the support protrusions 43 interfering with the back wall 23 of the body 22 serving as a stop. Thereby, the walls 33, 34 are positioned in the blocking position shown in FIGS. 1 and 2 by the springs 45.

(19) Bumps 50, which are protrusions extending only over a part of the length of the walls 33, 34 along the rotational axis 35, 36 and protruding toward the rolls 1, 2 or the axis 13 or to put it differently toward each other, are provided adjacent or at the second edges 40. According to one embodiment, an inner surface 51 of the concave portion 37 is continuous with an inner surface 52 of the bumps 50.

(20) Moreover, a rib 60 is formed on the body 22 in the center between the rotational axes 35 and 36 as shown in FIG. 2A. The rib 60 has a gradually increasing height and an axial direction of the rotational axes 35, 36 and/or of the support axis 13 and connects at its maximum height to the back wall 23 of the body 22. As shown in FIG. 1, the rib engages with an outer circumferential surface 41 of the non-accessible roll 1, thereby preventing rotation of the roll 1. The rib extends parallel or along the rotational axis 35, 36 and/or along the support axis 13.

(21) In the following, the function of the dispenser described above is explained mainly referring to FIGS. 1 and 3 to 6.

(22) FIG. 1 shows the dispenser loaded with two new, that is non-dispensed, rolls and with the closure 21 in the first position. In the first position, the portion 19 of the access opening 14 is closed by the closure 21. In this position, the body 22 and the first and second wall 33, 34 protect the first roll 1 from being accessed. In particular, the first roll 1 is capsuled in the first compartment 16 which is closed by the closure 21 with the second edges 40 of the first and second walls 33, 34 cooperating with the partition 18 and the wall 42 to close the compartment 16 at a lower end. Further, the first roll 1 is prevented from rotating by the rib 60, because the rib 60 is engaged with the outer circumferential surface 41 of the first roll 1. In this stage the second roll 2 may be accessed by a user via the portion 20 of the access opening 14 to dispense tissue paper from second roll 2.

(23) If the user in this stage slides the closure 21 using the handle 32 toward the second position, that is in the drawings to the right, the second wall 34, particularly its second edge 40, interferes with (contacts, engages with) the outer circumferential surface 41 of the second roll 2 (see FIG. 3). In this position, the second wall 34 being in the blocking position, in which the stop 43 abuts at the back wall 23 of the body 22, cannot rotate about the axis 36 counterclockwise. Thus, the second wall 34 prevents the further movement of the closure 21 to the right. The distance of movement in this case corresponds to the distance D1.

(24) At the same time, the spring 45 urging the first wall 33 toward the second wall 34 is tensioned, because the inner surface 51 of the concave portion 37 and the inner surface 52 of the bumps 50 engage with the outer circumferential surface 41 of the first roll 1, thereby rotating the first wall 33 about the axis 35 counterclockwise. If the user releases the closure 21, the spring 45 induces a force acting on the first wall 33 and via the first wall 33 on the outer circumferential surface 41 of the first roll 1. The forces thereby applied substantially parallel to the movement direction of the closure 21 to the right as indicated by the arrow A in FIG. 3. As a result, the closure 21 is automatically moved to the left into its originate position, the first position, as shown in FIG. 1.

(25) If the second roll 2 is further dispensed and the diameter of the second roll 2 reduces as shown in FIG. 4, the amount of movement of the closure 21 to the right increases to a distance D2. However, still the edge 40 of the second wall 34 interferes with the outer circumferential surface 41 of the second roll 2, thereby preventing further movement of the closure 21 to the right.

(26) In this stage, the first wall 33 is even further rotated about the axis 35, thereby increasing the tension of the spring 45. As can be seen from FIG. 4, which shows the spring, which is not visible in this view, by dotted lines, the spring acts substantially in parallel to a force vector perpendicular to the inner surface 52 of the bumps 50 and, thus, in an optimum direction to induce the force for returning the closure 21 into its originate position as shown in FIG. 1. Thus, the spring force required is not as high as if a spring was attached to the first edge 39 of the wall or if a torsion spring acted in the axis of rotation 35. In particular, because of the attachment of the spring 45 closer to the second edge 40 than to the first edge 39, the momentum achieved at the axis of rotation increases making use of a relatively large lever arm. In addition, the force vector is substantially parallel to the spring 45 meaning that not much force is lost acting in a different direction not usable for moving the closure 21 into its originate position. Moreover, because of the bumps 50, the inner surface acting on the outer circumferential surface 41 of the first roll 1 in this stage is moved further to the end of the wall 33, thereby also reducing the required force to return the closure 21 into its original position shown in FIG. 1.

(27) Finally, if the second roll 2 is substantially dispensed as shown in FIG. 5, the upper edge 40 of the second wall 34 may pass the second roll 2, whereby the first wall 33 is even further rotated counterclockwise about the axis 35, thereby allowing movement of the closure, particularly the second wall 33 past the first roll 1 so that the closure 21 may be moved completely into the second position as shown in FIG. 6. In the second position, the portion 20 of the access opening 14 is closed and access to the first roll 1 is given via the first portion 19 of the access opening 14. In this stage, a user can access the first roll 1 and dispense the paper by unreeling the first roll 1 and gripping the tail through the portion 19 of the access opening 14.

(28) In this stage, the dispenser may be refilled by an operator removing the remaining portion of the second roll 2, if any, and replacing it by a new roll (then spare roll). If the first roll 1 is then again substantially dispensed, the closure 21 may be moved to the first position as shown in FIG. 1, whereby the process is the opposite to that shown in FIGS. 5 and 6. If the first roll 1 is not fully dispensed similar to the stage of the second roll 2 in FIG. 4 or the second roll 2 in FIG. 3, the closure 21 may not be moved to the left, because the upper edge 40 of the first wall 33 interferes with the outer circumferential surface 41 of the first roll 1. Similar as described above, the second wall 34 then serves to return the closure 21 into its originate position, then the second position covering the portion 20 of the access opening 14 as shown in FIG. 6.

(29) In the above embodiment, a dispenser having two rolls has been described, but a dispenser having more than two rolls is as well conceivable, wherein the rolls are disposed in a row. Also the embodiment has been described together with the use of so-called coreless rolls, but the present disclosure may also be applied to common rolls having a core, for example made of cardboard. Even further, the walls have been described as being a concave/convex, but it was also conceivable to use straight or planar walls instead. Moreover, the present embodiment has been described using a substantially rectangular housing. However, it is also conceivable to use a housing which is more closely adapted to the outer circumferential surface 41 of completely new rolls. Thereby, the entire footprint of the dispenser on a wall can be reduced. In addition various other amendments are conceivable to the described embodiment and the invention is, therefore, only limited by the following claims.