METHOD FOR PACKAGING AN OBJECT IN A PAPER BAG, AND PAPER BAG

Abstract

The invention relates to a method for packaging an object in a paper sack which has a first open end and a second closed end opposite the first end, said ends being spaced apart from each other by a length L of the paper sack, the method comprising the following steps: arranging the paper sack on a filler neck of a filler device, inserting the object into the open end of the paper sack until the object is in contact with the closed end, inserting the object further into the paper sack, so that the second, closed end moves away from the first, open end and the length L of the paper sack increases.

Claims

1. A method for packaging an object in a paper sack comprising a first open end and a second closed end opposite the first open end, said first open end and said second closed end being spaced apart from each other by a length of the paper sack, comprising: arranging the paper sack on a filler neck of a filler device; inserting the object into the first open end of the paper sack until the object is in contact with the second closed end; and inserting the object further into the paper sack, so that the second closed end moves away from the first open end and the length of the paper sack increases to a second length.

2. The method according to claim 1, further comprising closing the first open end after the object has been inserted further into the paper sack.

3. A paper sack, comprising: a first open end; and a closed second end opposite the first open end, said first open end and said second closed end being spaced apart from each other by a length of the paper sack, wherein the paper sack is configured such that the second closed end is moveable away from the first open end to increase the paper sack to a second length.

4. The paper sack according to claim 3, further comprising two or more paper layers arranged such that two or more paper layers are slidable inside one another, wherein the first open end is formed by a first paper layer of the two or more paper layers and the second closed end is formed by a second paper layer of the two or more paper layers.

5. The paper sack according to claim 4, wherein the two or more paper layers are not connected to each other to form connected paper layers.

6. The paper sack according to claim 5, further comprising at least one limiting element, and wherein at least some of the two or more paper layers are connected to the at least one limiting element, wherein the at least one limiting element limits a maximum displaceability of the connected paper layers relative to one another.

7. The paper sack according to claim 6, wherein a maximum possible length for said second length is limited by the at least one limiting element.

8. The paper sack according to claim 4 wherein a first end of each of the two or more the paper layers face the first open end of the paper sack, and are at different distances from the first open end of the paper sack.

9. The paper sack according to claim 4 wherein the two or more paper layers are arranged such that at least one of the two or more paper layers is further inside the paper sack than at least a second of the two or more paper layers, and wherein a first end of the at least one of the two or more paper layers is relatively further away from the first open end of the paper sack than a first end of the at least a second of the two or more paper layers.

10. The paper sack according to claim 3, further comprising a fold which allows the second closed end to be moved away from the first open end to increase the paper sack to the second length.

11. A filler neck for a filler device for use in a method according to claim 1, comprising multiple inflating elements that are arranged and configured in such that they are fillable with a fluid causing an outer diameter of the filler neck to expand.

12. The filler neck according to claim 11, wherein the multiple inflating elements are arranged side by side along a longitudinal axis of the filler neck.

13. The filler neck according to claim 11 wherein the multiple inflating elements are fillable with the fluid and emptiable of the fluid independently from each other.

14. The method of claim 2 wherein closing is performed by at least one of sealing, gluing, sewing, folding, or joining.

15. The paper sack according to claim 6 wherein at least one limiting element is selected from the group consisting of a paper strip, a tape, and a belt.

16. The paper sack according to claim 10 wherein the fold is a concertina fold.

17. The filler neck according to claim 11 wherein the fluid is compressed air.

18. The filler neck according to claim 12 wherein the multiple inflating elements are spaced apart and side by side.

Description

[0026] A number of embodiment examples of the invention will be explained in more detail with the aid of the accompanying drawings. They show:

[0027] FIG. 1a schematic representation of a paper sack according to an embodiment example of the present invention,

[0028] FIG. 2 a schematic representation of a filler neck according to an embodiment example of the present invention,

[0029] FIG. 3 a schematic sectional view through such a filler neck,

[0030] FIG. 4the schematic sectional view through a filler neck and a paper sack,

[0031] FIG. 5the schematic representation of a paper sack according to a further embodiment example of the present invention and

[0032] FIGS. 6 and 7 schematic representations of a further embodiment of paper sacks in various states.

[0033] FIG. 1 schematically depicts a paper sack 2 according to a first embodiment example of the present invention. It has a first paper layer 4, which forms a first, open end 6 of the paper sack 2. The paper sack 2 also has a second paper layer 8, which forms a second, closed end 10 of the paper sack 2. In the embodiment example shown, the second, closed end 10 has a schematically depicted star seal 12. The first paper layer 4 and the second paper layer 8 are arranged such that they can be displaced relative to one another along the double arrow 14.

[0034] FIG. 2 schematically depicts a filler neck 16 according to an embodiment example of the present invention. It features fastening attachments 18 with which it can be attached, for example, to a device in which the object to be packaged is conditioned, for example pressed and/or rolled. In the embodiment example shown, the object to be packaged is moved through the neck 16 and leaves it through an outlet opening 20, over which a paper sack 2, like the type shown in FIG. 1, has been pulled.

[0035] In the embodiment example shown, the filler neck 16 has two inflating elements 22, which are arranged side by side along the longitudinal axis of the filler neck 16. They are preferably made of an elastic material and can be filled with a fluid, preferably compressed air. This causes them to inflate, thereby increasing their outer diameter. In FIG. 2, a fluid connection 24 is depicted on the filler neck 16, through which a fluid can be guided into the filler neck 16 and into at least one of the inflating elements 22.

[0036] FIG. 3 shows a schematic section view through a filler neck 16 similar to the type shown in FIG. 2. The fastening attachments 18 and the outlet opening 20 can be seen. The two inflating elements 22 are arranged one above the other in FIG. 3, i.e spaced apart again along the longitudinal direction. Two fluid channels 26 are depicted inside the filler neck 16, each of which connected one of the two fluid connections 24 to one of the two inflating elements 22. This means that the two inflating elements 22 can be filled with fluid independently from each other. Likewise the fluid can be removed from each of the two inflating elements 22 regardless of the filling level of the respective other inflating element 22.

[0037] FIG. 4 schematically depicts a paper sack 2, which comprises the first paper layer 4 and the second paper layer 8. Unlike the paper sack 2 shown in FIG. 1, with the paper sack 2 shown in FIG. 4, the second paper layer 8 is arranged inside the first paper layer 4. The second paper layer 8 features the second, closed end 10. The paper sack 2 has been pushed with the first, open end 6 opposite over the outlet opening 20 of the filler neck 16. The filler neck 16 corresponds largely to the filler neck shown in FIG. 3 and has, in particular, two inflating elements 22, of which the first inflating element 22 on the left is filled with fluid, while the second inflating element 22 on the right is not filled. In this case, the positioning of the first paper layer 4 and the second paper layer 8 is selected in such a way that the first paper layer 4 can be held by the first inflating element 22 on the left, but not the second paper layer 8.

[0038] One can see that the first inflating element 22 changes the outer contour of the first paper layer 4 and exerts a tension or on outward-acting pressure on the first paper layer 4, thus holding it in place. In the embodiment example shown, this results in a frictional connection. The second paper layer 8 does not surround the first inflating element 22 on the left, so that it is not affected by the frictional connection. To fasten and hold the second paper layer 8 on the filler neck 16 as well, the second inflating element 22 on the right would also have to be filled with fluid. The growing circumference would result in a further frictional connection. In the state shown, however, the second paper layer 8 can be displaced to the right without removing the first paper layer 4 from the filler neck 16. This causes the length L of the paper sack 2 to increase.

[0039] FIG. 5 depicts a further embodiment of a paper sack 2 according to a further embodiment example of the present invention. It features the first, open end 6 and the second, closed end 10 opposite, in which the star seal 12 is again located. Unlike the paper sacks 2 shown in FIGS. 1 and 4, the paper sack according to FIG. 5 does not have a first paper layer 4 and a second paper layer 8; rather, it has just one paper layer. However, said paper layer features a fold 28, which is a concertina fold in the embodiment example shown. The fold 28 allows the second, closed end 10 to be removed from the first, open end 6, thereby increasing the length L of the paper sack 2 without damaging the sack.

[0040] FIG. 6 depicts a paper sack 2 according to a further embodiment example of the present invention. In the upper illustration, the first paper layer 4, which forms the first, open end 6, is inserted into the second paper layer 8. Between the first paper layer 4 and the second paper layer 8 is a limiting element 30, which is attached to the first paper layer 4 at a first attachment point 32 and to the second paper layer 8 at a second attachment point 34. If the second paper layer 8 is now displaced to the right by an inserted component to be packaged, the length L of the paper sack 2 increases. This situation is shown in the lower illustration in FIG. 6. By way of the limiting element 30, the maximum displacement of the two paper layers 4, 8 relative to each other is limited and the maximum length L of the paper sack 2 determined.

[0041] FIG. 7 shows the two situations from FIG. 6 in a schematically different representation. In the upper, compressed position, one can see that the first paper layer 4 is far inside the second paper layer 8. The limiting element 30 is fixed at the first attachment point 32 close to the right-hand end of the first paper layer 4 facing away from the open end 6. The limiting element 30 is fixed to the outer, second paper layer 8 at the second attachment point 34.

[0042] The lower illustration shows how the limiting element 30 deforms when the two paper layers 4, 8 are moved relative to one another. Said element nevertheless remains fixed on the first paper layer 4 at the first attachment point 32 and on the second paper layer 8 at the second attachment point 34.

REFERENCE LIST

[0043] 2 paper sack [0044] 4 first paper layer [0045] 6 first, open end [0046] 8 second paper layer [0047] 10 second, closed end [0048] 12 star seal [0049] 14 double arrow [0050] 16 filler neck [0051] 18 fastening attachment [0052] 20 outlet opening [0053] 22 inflating element [0054] 24 fluid connection [0055] 26 fluid line [0056] 28 fold [0057] 30 limiting element [0058] 32 first attachment point [0059] 34 second attachment point