Sleeve and Method for Producing a Sleeve

Abstract

The invention relates to a sleeve for receiving a filling product, wherein the sleeve has a proximal end comprising a proximal abutting edge, and a distal end comprising a distal abutting edge, and a sleeve wall extending between the proximal end and the distal end and delimiting a receiving space for the filling product, wherein the sleeve wall comprises an inner side facing the receiving space and an outer side facing away from the receiving space and wherein the sleeve is produced from a material comprising fibers. The invention is characterized in that at least one abutting edge of the sleeve is covered by a material portion resting against the sleeve wherein, in a region adjoining the abutting edge, the material portion covering the abutting edge rests against both the inner side and the outer side of the sleeve wall.

Claims

1. A sleeve (1) for receiving a filling product, wherein the sleeve (1) has a proximal end (2) comprising a proximal abutting edge (3), and a distal end (4) comprising a distal abutting edge (5), and a sleeve wall (7) extending between the proximal end (2) and the distal end (4) and delimiting a receiving space (6) for the filling product, wherein the sleeve wall (7) comprises an inner side (8) facing the receiving space (6) and an outer side (9) facing away from the receiving space (6), and wherein the sleeve (1) is produced from a material comprising fibers, wherein at least one abutting edge (3, 5) of the sleeve (1) is covered by a material portion (10, 11) resting against the sleeve (1), wherein, in a region adjoining the abutting edge (3, 5), the material portion (10, 11) covering the abutting edge (3, 5) rests against both the inner side (8) and the outer side (9) of the sleeve wall (7).

2. The sleeve (1) according to claim 1, wherein both the proximal abutting edge (3) and the distal abutting edge (5) are covered by at least one material portion (10, 11) resting against the sleeve (1).

3. The sleeve (1) according to claim 2, wherein the proximal abutting edge (3) and the distal abutting edge (5) are covered by two different material portions (10, 11).

4. The sleeve (1) according to claim 1, wherein each material portion (10, 11) is strip-shaped and extends from the abutting edge (3, 5) over a maximum of 10% of the length of the sleeve (1).

5. The sleeve (1) according to claim 1, wherein both the proximal abutting edge (3) and the distal abutting edge (5) are covered by the same material portion (10), which extends over the entire length of the sleeve (1), completely covers the outer side (9) of the sleeve wall (7) and is guided over the two abutting edges (3, 5) of the sleeve (1) into the receiving space (6) in such a way that it rests, at least in some regions, against the inner side (8) of the sleeve wall (7).

6. The sleeve (1) according to claim 5, wherein the material portion (10) is printed on at least in some regions and has the function of a label.

7. The sleeve (1) according to claim 1, wherein the sleeve (1) is produced from a plant-fiber-based material.

8. The sleeve (1) according to claim 1, wherein the material portion (10) is produced from paper.

9. A method for producing a sleeve (1) according to claim 1, comprising following steps of: forming a sleeve (1) from a material comprising fibers, wherein the sleeve (1) comprises a proximal abutting edge (3) and a distal abutting edge (5); applying an adhesive to at least one region of the outer side (9) of the sleeve wall (7); resting at least one material portion (10) against the sleeve (1) such that at least one of the two abutting edges (3, 5) is covered by the at least one material portion (10), wherein, in a region adjoining the abutting edge (3, 5), the material portion (10) rests against both the inner side (8) and the outer side (9) of the sleeve wall (7) and is fixed to the outer side (9) of the sleeve wall (7) by the applied adhesive.

10. The method according to claim 9, wherein a first and a second strip-shaped material portion (10, 11) are placed against the sleeve (1) in such a way that the first material portion (10) covers the proximal abutting edge (3) and the second material portion (11) covers the distal abutting edge (5).

11. The method according to claim 9, wherein a printed material portion (10) is placed against the sleeve (1), which material portion covers both the proximal abutting edge (3) and the distal abutting edge (5) and at the same time has the function of a label.

12. A cartridge for use in a cartridge gun, said cartridge comprising a sleeve (1) according to claim 1, wherein the sleeve (1) is capable of receiving a tubular bag filled with viscous material.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In the following, the invention is explained in more detail by means of an exemplary embodiment and with reference to the attached figures. In the figures:

[0033] FIG. 1: is a perspective view of a sleeve according to the invention in a first embodiment;

[0034] FIG. 2: is a top view a material portion in a first embodiment;

[0035] FIG. 3: is a perspective view of a sleeve according to the invention in a second embodiment;

[0036] FIG. 4: is a top view a material portion in a second embodiment.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

[0037] FIG. 1 shows a sleeve, designated as a whole by 1, for receiving a filling product. The sleeve 1 is produced from a paper material as a winding sleeve and can be used as a cartridge in a cartridge gun not shown here.

[0038] The sleeve 1 has a proximal end 2 comprising a proximal abutting edge 3, a distal end 4 comprising a distal abutting edge 5, and a sleeve wall 7 extending between the proximal end 2 and the distal end 4 and delimiting a receiving space 6 for the filling product. When the sleeve 1 is used as a cartridge, for example, a tubular bag containing a viscous material can be introduced into the receiving space 6. The sleeve wall 7 comprises an inner side 8 facing the receiving space 6 and an outer side 9 facing away from the receiving space 6.

[0039] The proximal abutting edge 3 is covered by a material portion 10; the distal abutting edge 5 is covered by a material portion 11. The two material portions 10, 11 are produced from paper and are strip-shaped. FIG. 2 shows an example of material portion 10. The material portion 11 is designed in the same way.

[0040] The dimensions of the strip-shaped material portions 10, 11 are selected such that, when resting against the sleeve 1, they completely cover the particular abutting edge 3, 5 and, in a region adjoining the abutting edges 3, 5, they rest against both the inner side 8 and the outer side 9 of the sleeve wall 7. In FIGS. 1 and 2, the portion of the material portion 10 adjoining the inner side 8 of the sleeve wall 7 is designated by 12, while the portion adjoining the outer side 9 of the sleeve wall 7 is designated by 13. The portions 12 and 13 are separated from each other by a narrow portion 14 that, when resting against the sleeve 1, covers the abutting edge 3. An edge region 15 represents an overlap region in which the two short-side ends of the material portion 10 overlap when resting against the sleeve 1.

[0041] The material portion 10 is glued to the outer side 9 of the sleeve wall 7 within the portion 13. In an analogous manner, the material portion 11 is fixed to the outer side 9 by gluing. The portion 12 of the material portion 10 and the corresponding portion of the material portion 11 only rest loosely against the inner side 8 of the sleeve wall 7.

[0042] A label carrying product information (not shown in the figures) can be arranged on the sleeve 1 in such a way that it at least partially covers the portions 13 of the material portions 10, 11 adjoining the outer side 9 of the sleeve wall 7.

[0043] The sleeve 1 has a length L of approximately 22 cm. The material portions 10, 11 have a width B of approximately 3.2 cm, wherein the portion 13 has a width of approximately 2 cm and the portion 12 has a width of approximately 1 cm. The two material portions 10, 11 thus extend from the abutting edges 3, 5 over no more than 10% of the length of the sleeve 1.

[0044] FIG. 3 shows another embodiment of a sleeve 1 produced from a paper material. In contrast to the sleeve 1 shown in FIG. 1, a single material portion 10 is placed against the sleeve 1 of FIG. 3, which single material portion covers both the proximal abutting edge 3 and the distal abutting edge 5 and extends over the entire length of the sleeve 1. The material portion 10 completely covers the outer side 9 of the sleeve wall 7 and is guided over the two abutting edges 3, 5 of the sleeve 1 into the receiving space 6 such that it rests against the inner side 8 of the sleeve wall 7.

[0045] The material portion 10 shown in FIGS. 3 and 4 is also produced from paper. It is printed with product information at least in some regions, which is not shown in FIG. 3, and thus simultaneously has the function of a label.

[0046] FIG. 4 shows the material portion 10, the length of which L.sub.M extends beyond the length L of the sleeve 1 so that edge portions 16, 17 of the material portion 10 can be folded inward over the abutting edges 3, 5 of the sleeve 1 and come to rest on the inner side 8 of the sleeve wall 7, which can also be seen for the edge portion 16 in FIG. 3. In addition to the material portion 10, the sleeve 1 is shown in a longitudinal section in FIG. 4.

[0047] A region 18 represents an overlap region in which the two long ends of the material portion 10 overlap when resting against the sleeve 1.

[0048] Due to the covering of the abutting edges 3, 5 of the sleeve 1 produced from a paper material by material portions 10, 11 made of paper, the abutting edges 3, 5 are better protected against moisture so that the sleeve 1 has an overall improved moisture resistance and retains its shape and stability significantly longer when exposed to moisture.