Sleeve and method for manufacturing the same

Abstract

The present invention relates to a sleeve (1) for receiving a filled product, the sleeve (1) having a proximal end (2) including a proximal joint end (3), a distal end (4) including a distal joint end (5), and a sleeve wall (7) extending between the proximal end (2) and the distal end (4) and defining a receiving space (6) for receiving a filled product, the sleeve wall (7) having an inner side (8) facing the receiving space (6) and an outer side (9) away from the receiving space (6), and the sleeve (1) being manufactured from a fiber-containing material. The present invention is characterized in that at least one joint end (3, 5) of the sleeve (1) is covered with a material portion (10, 11) in contact with the sleeve (1), and in the region in contact with the joint end (3, 5), the material portion (10, 11) covering the joint end (3, 5) is in contact with both the inner side (8) and the outer side (9) of the sleeve wall (7).

Description

Technical Field

[0001] The present invention relates to a sleeve for receiving a filling product and a method for manufacturing such a sleeve. Furthermore, the present invention relates to the use of such a sleeve as a cartridge for a cartridge gun.

Background Art

[0002] In professional and personal use, viscous materials such as silicon, acrylic, adhesives, etc. are typically supplied as cartridges so that the material can be discharged from the cartridge using a cartridge gun. Commercially available cartridges are usually manufactured from thick-walled plastic materials.

[0003] With the increasing awareness of environmental protection and sustainability, efforts have already been made to replace thick-walled plastic cartridges with a combination of a film bag for holding the viscous material and a sleeve for holding the film bag. The sleeve is manufactured from a sustainable and easily recyclable material such as cardboard.

[0004] For example, DE 91 16 065 describes an apparatus for processing a material packaged in a film tube. In this apparatus, a film tube filled with a viscous material is accommodated in an outer sleeve in which a plurality of paper layers are spirally wound, and this sleeve can be inserted into a conventional cartridge gun. The content of plastic material in such a system is significantly reduced compared to conventional cartridge guns. After being emptied, the outer sleeve is separated from the film bag, and both components can be supplied to appropriate recycling processes. The cardboard sleeve is often designed as a winding sleeve as disclosed in DE 91 16 065, and a sleeve is formed by spirally winding and overlapping a plurality of layers of paper or cardboard strips and then bonding them.

Summary of the Invention

[0005] A drawback of cardboard sleeves is that they are less durable in some respects compared to plastic cartridges. In particular, paper and cardboard are highly hygroscopic and react strongly to moisture. As they absorb and retain ambient moisture, the pulp fibers in the paper material expand, and the sleeve may deform due to the effects of moisture, losing its shape and stability, potentially rendering it unusable. When using roll-up sleeves, the paper band may be partially or completely unwound.

[0006] At construction sites, it is unavoidable that material inventory will be exposed to the elements, especially rain, for a certain period of time, or stored in rooms with very high humidity. Due to the effects of these moisture, the corrugated tubes expand as described above, losing their moldability and stability in the tubular bags they contain, which can interfere with their use in cartridge guns.

[0007] The object of the present invention is to overcome the shortcomings of the prior art and provide a filling product receiving sleeve that has superior moisture resistance compared to known sleeves. Furthermore, the object of the present invention is to provide a method for manufacturing such a sleeve.

[0008] These objectives are achieved by a sleeve having the features described in claim 1 and a method for manufacturing such a sleeve having the features described in claim 10.

[0009] The dependent claims relate to specific embodiments and variations of the present invention.

[0010] According to claim 1, the present invention relates to a sleeve for receiving a filled product, the sleeve having a proximal joint end at a proximal end and a distal joint end at a distal end, and having a sleeve wall extending between the proximal and distal ends and defining a space for receiving the filled product, the sleeve wall having an inner side facing the space for receiving and an outer side away from the space for receiving, and the sleeve being made of a fiber-containing material. The present invention is characterized in that at least one joint end of the sleeve is covered with a material portion in contact with the sleeve, the material portion being arranged such that, in a region adjacent to the joint end, the material portion covering the joint end is in contact with both the inner and outer sides of the sleeve wall.

[0011] In other words, the present invention provides that at least one joint end of a sleeve manufactured from a fiber-containing material is covered with a material portion that extends to a region in contact with at least a portion of the inner and outer sides of the sleeve wall. This prevents, or at least makes difficult, moisture from directly penetrating the sleeve material through the otherwise exposed joint end, causing rapid expansion of the fibers and consequently compromising the stability of the material.

[0012] Moisture absorption into fiber-containing materials has been shown to occur primarily along exposed joint ends, i.e., the ends where the material was cut in the previous manufacturing process. Such joint ends are typically present at both ends of a core, and in the case of a winding core, also at the ends of the winding paper strip. However, these ends are covered with labels containing product information, providing some protection from external moisture, and moisture penetration occurs mainly through the open joint ends at both ends of the sleeve.

[0013] According to the present invention, by covering these joint ends with at least one separate material portion, moisture penetration can be prevented or reduced for at least a certain period of time.

[0014] In one embodiment of the present invention, both the proximal and distal joint ends are covered with at least one material portion in contact with the sleeve. The proximal and distal joint ends can also be configured to be covered with two different material portions.

[0015] In one embodiment of the present invention, each material portion is strip-shaped and extends from the joint end to a range of up to 10% of the sleeve length. That is, separate strip-shaped material portions are positioned at both the proximal and distal ends of the sleeve, and the separate strip-shaped material portions cover a particular joint end and extend along a narrow area in contact with the inside and outside of the sleeve wall. The material portions are configured to adhere to the inside and / or outside of the sleeve wall and can be configured to adhere to only specific points as needed.

[0016] If a label containing product information is provided on the sleeve, it is preferable that this label be positioned on the sleeve so as to cover at least a portion of the material that is in contact with the outside of the sleeve wall.

[0017] The advantages of this design are that the sleeve can be manufactured so that the material portion covers the joint ends, and the sleeve can be filled with a tubular bag containing a viscous material, while labels that can be adapted to a specific target market can be applied to the sleeve individually in a later process.

[0018] In an alternative embodiment of the invention that is particularly efficient in manufacturing technology, both the proximal and distal joint ends are covered by a portion of the same material that extends along the entire length of the sleeve, completely covering the outside of the sleeve wall and leading across the two joint ends of the sleeve into a receiving space. This portion of material is positioned to be in contact with the inside of the sleeve wall in at least some areas.

[0019] In other words, a single large piece of material can be positioned relative to the sleeve, with its ends extending beyond both ends of the sleeve, being bent over the joint ends and guided inward into the receiving space of the sleeve, so as to be in contact with the inner wall of the sleeve in at least a narrow area adjacent to the joint ends.

[0020] The material portion can be printed on at least a portion of it, and configured to function as a label. The advantage of this design is that by placing the printed material portion in the sleeve, protection of the joint ends and a label containing product information can be applied in a single manufacturing process.

[0021] In one embodiment of the present invention, the sleeve is made of a material derived from plant fibers. For example, the sleeve can be manufactured from paper or corrugated cardboard.

[0022] In another embodiment of the present invention, the material portion is manufactured from paper. When the sleeve and at least one material portion are manufactured from paper or corrugated cardboard, the combination of the sleeve and material portion is recyclable. Of course, it is also possible to cover it with a material portion made of other materials, such as plastic. However, such composite materials are difficult to recycle. Furthermore, it has been shown that covering the joint ends with a material portion made of paper is generally sufficient to adequately protect them from moisture.

[0023] The present invention also relates to using the sleeve described in any of claims 1 to 8 as a cartridge for a cartridge gun. In this case, the sleeve is used to receive a tubular bag filled with a viscous substance.

[0024] Furthermore, the sleeve of the present invention can, of course, be used for other purposes as well, for example, as a container for adhesive sticks, and can function as a replacement for conventionally used plastic sleeves.

[0025] Finally, the present invention also relates to a method for manufacturing a sleeve according to any one of claims 1 to 8. This method comprises the following steps: A process of forming a sleeve from a fiber-containing material, wherein the sleeve has a proximal joint end and a distal joint end; The process of applying adhesive to at least a portion of the outside of the sleeve wall; At least one material portion is arranged to abut against the sleeve, at least one of the two joint ends is covered with at least one material portion, and in the region adjacent to the joint end, the material portion abuts against both the inner and outer sides of the wall of the sleeve and is fixed to the outer side of the sleeve by the applied adhesive.

[0026] For example, first, the material portion is adhered to the outer side of the sleeve, and then, for example, by using a suitable movable piston to drive it in and bend it inward beyond the joint end, the material portion can be arranged relative to the sleeve. It is basically possible to fix the material portion by adhering it to the inner side of the sleeve, etc., but generally it is not necessary.

[0027] In one embodiment of the method of the present invention, the first strip-shaped material portion and the second strip-shaped material portion are arranged relative to the sleeve such that the first material portion covers the proximal joint end and the second material portion covers the distal joint end.

[0028] In another embodiment of the method, the printed material portion arranged relative to the sleeve covers both the proximal joint end and the distal joint end and simultaneously has the function of a label.

Brief Description of the Drawings

[0029] Hereinafter, the present invention will be described in detail by way of exemplary embodiments with reference to the accompanying drawings.

[0030] [Figure 1] Perspective view of the sleeve in the first embodiment of the present invention. [Figure 2] View showing the material portion in the first embodiment. [Figure 3] Perspective view of the sleeve in the second embodiment of the present invention. [Figure 4] View showing the material portion in the second embodiment.

Modes for Carrying Out the Invention

[0031] Figure 1 shows a sleeve for receiving a filled product, represented as 1 in its entirety. Sleeve 1 is manufactured as a rolled sleeve from paper material and can be used as a cartridge for a cartridge gun not shown here.

[0032] Sleeve 1 includes a proximal end 2 including a proximal joint end 3, a distal end 4 including a distal joint end 5, and a sleeve wall 7 extending between the proximal end 2 and the distal end 4 to define a containment space 6 for a filled product. When Sleeve 1 is used as a cartridge, for example, a tubular bag containing a viscous substance can be inserted into the containment space 6. Sleeve wall 7 includes an inner side 8 facing the containment space 6 and an outer side 9 facing away from the containment space 6.

[0033] The proximal joint end 3 is covered with material portion 10, and the distal joint end 5 is covered with material portion 11. Material portions 10 and 11 are manufactured from paper and are in strip form. Figure 2 shows an example of material portion 10. Material portion 11 is designed similarly.

[0034] The dimensions of the strip-shaped material portions 10 and 11 are selected so that, when in contact with the sleeve 1, they completely cover specific joint ends 3 and 5, and in areas adjacent to the joint ends 3 and 5, they contact both the inner and outer sides 8 and 9 of the sleeve wall 7. In Figures 1 and 2, the portion of the material portion 10 that contacts the inner side 8 of the sleeve wall 7 is indicated by 12, while the portion that contacts the outer side 9 of the sleeve wall 7 is indicated by 13. The portions 12 and 13 are separated from each other by a narrow portion 14 that covers the joint end 3 when in contact with the sleeve 1. The end region 15 represents the overlapping region where the two short sides of the material portion 10 overlap when placed on the sleeve 1.

[0035] Material portion 10 is bonded to the outer surface 9 of the sleeve wall 7 within portion 13. Similarly, material portion 11 is fixed to the outer surface 9 by adhesive. The portion 12 of material portion 10 and the corresponding portion of material portion 11 are in loose contact with the inner surface 8 of the sleeve wall 7.

[0036] A label (not shown) containing product information can be placed on the sleeve 1 and positioned to at least partially cover portions 13 of material portions 10 and 11 that are in contact with the outer surface 9 of the sleeve wall 7.

[0037] The length L of sleeve 1 is approximately 22 cm. The width B of material parts 10 and 11 is approximately 3.2 cm, of which part 13 is approximately 2 cm wide and part 12 is approximately 1 cm wide. As a result, the two material parts 10 and 11 do not extend beyond 10% of the length of sleeve 1 from the joint ends 3 and 5.

[0038] Figure 3 shows another embodiment of sleeve 1 manufactured from paper material. Unlike sleeve 1 shown in Figure 1, sleeve 1 in Figure 3 has a single material portion 10 which covers both the proximal joint end 3 and the distal joint end 5 and extends along the entire length of sleeve 1. The material portion 10 completely covers the outside 9 of sleeve wall 7, passes through the two joint ends 3 and 5 of sleeve 1, enters the housing space 6, and is positioned to be in contact with the inside 8 of sleeve wall 7.

[0039] The material portion 10 shown in Figures 3 and 4 is also manufactured from paper. Although not shown in Figure 3, product information is printed on at least some areas, thus also serving as a label.

[0040] Figure 4 shows length L. M The figure shows a material portion 10 that extends beyond the length L of the sleeve 1, with the ends 16 and 17 of the material portion 10 bent inward over the joint ends 3 and 5 of the sleeve 1 and positioned in contact with the inside 8 of the sleeve wall 7. This can also be seen in the end 16 of Figure 3. In Figure 4, in addition to the material portion 10, the sleeve 1 is shown in a longitudinal section view.

[0041] Region 18 represents an overlapping region where the two longitudinal ends of the material portion 10 overlap when in contact with the sleeve 1.

[0042] The joint ends 3 and 5 of the sleeve 1, which is made of paper material, are covered by material parts 10 and 11, which are also made of paper material. As a result, the joint ends 3 and 5 are more effectively protected from moisture, the sleeve 1 as a whole has improved moisture resistance, and maintains its shape and stability for a significantly longer period even when exposed to moisture.

Claims

1. A sleeve (1) for receiving a filled product, the sleeve (1) having a proximal end (2) including a proximal joint end (3), a distal end (4) including a distal joint end (5), and a sleeve wall (7) extending between the proximal end (2) and the distal end (4) defining a receiving space (6) for the filled product, the sleeve wall (7) having an inner side (8) facing the receiving space (6) and an outer side (9) away from the receiving space (6), and the sleeve (1) being made of a fiber-containing material, At least one joint end (3, 5) of the sleeve (1) is covered by a material portion (10, 11) that is in contact with the sleeve (1). A sleeve (1) characterized in that, in the region in contact with the joint ends (3, 5), the material portion (10, 11) covering the joint ends (3, 5) is in contact with both the inside (8) and outside (9) of the sleeve wall (7).

2. The sleeve (1) according to claim 1, characterized in that both the proximal joint end (3) and the distal joint end (5) are covered with at least one material portion (10, 11) that is in contact with the sleeve (1).

3. The sleeve (1) according to claim 2, characterized in that the proximal joint end (3) and the distal joint end (5) are covered with two different material portions (10, 11).

4. The sleeve (1) according to any one of claims 1 to 3, characterized in that each material portion (10, 11) is strip-shaped and extends from the joint end (3, 5) to a range of up to 10% of the length of the sleeve (1).

5. The sleeve (1) according to claim 1 or 2, characterized in that both the proximal joint end (3) and the distal joint end (5) are covered with the same material portion (10), the material portion (10) extends along the entire length of the sleeve (1), completely covers the outside (9) of the sleeve wall (7), is led into the housing space (6) beyond the two joint ends (3, 5) of the sleeve (1), and is positioned to be in contact with the inside (8) of the sleeve wall (7) in at least some areas.

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

7. The sleeve (1) is characterized in that it is manufactured from a material made from plant fibers, according to any one of claims 1 to 6.

8. The sleeve (1) according to any one of claims 1 to 7, characterized in that it is made from a material portion (10) or paper.

9. Use of the sleeve (1) according to any one of claims 1 to 8 as a cartridge for a cartridge gun, wherein the sleeve (1) is used to receive a tubular bag filled with a viscous material.

10. A method for manufacturing a sleeve (1) according to any one of claims 1 to 8, A step of forming a sleeve (1) from a fiber-containing material, wherein the sleeve (1) includes a proximal joint end (3) and a distal joint end (5); Steps include providing adhesive to at least one area on the outside (9) of the sleeve wall (7); The process includes the step of positioning at least one material portion (10) in contact with the sleeve (1), and covering at least one of the two joint ends (3, 5) with at least one material portion (10), In the region in contact with the joint ends (3, 5), the material portion (10) is in contact with both the inside (8) and outside (9) of the sleeve wall (7), and is fixed to the outside (9) of the sleeve wall (7) by a provided adhesive.

11. The method according to 9, characterized in that the first and second strip-shaped material portions (10, 11) are positioned relative to the sleeve (1), the first material portion (10) covers the proximal joint end (3), and the second material portion (11) covers the distal joint end (5).

12. The method according to 9, characterized in that the printed material portion (10) is positioned relative to the sleeve (1), and the material portion covers both the proximal joint end (3) and the distal joint end (5), and simultaneously serves as a label.

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