Method for producing a cartridge and cartridge

Patent metadata

Field	Value
Publication number	US-11639241-B2
Application number	US-202017756239-A
Country	US
Kind code	B2
Filing date	Dec 1, 2020
Priority date	Dec 13, 2019
Publication date	May 2, 2023
Grant date	May 2, 2023

Abstract

A cartridge for a dispensing device contains at least one elongate film pouch, which is inherently non-rigid and which has a chamber for receiving a composition. The cartridge also contains a head part for interacting with the film pouch. The film pouch has an opening on a side facing the head part, which is closed by a cover. The cover has a predetermined breaking region. A method can be used for producing such a cartridge.

First claim

The invention claimed is:

1. A method for producing a cartridge for a dispensing device, the method comprising:
providing at least one non-rigid, elongate film pouch which comprises a chamber and an opening, a head part, and a rigid insert having a passage,
connecting the rigid insert to the at least one non-rigid, elongate film pouch,
filling the chamber with a composition through the passage, and
closing the passage with a cover,
wherein the rigid insert is connected to the head part in a welding process carried out by introducing heat into the cover.

2. The method according to claim 1 , wherein the rigid insert is connected to the head part in an induction welding process.

3. The method according to claim 1 , wherein a welding tool for carrying out the welding process is guided from a side of the at least one non-rigid, elongate film pouch facing away from the head part over the at least one non-rigid, elongate film pouch in a direction of the rigid insert and the head part.

4. The method according to claim 3 , wherein the at least one non-rigid, elongate film pouch consists of a single film pouch, and
wherein the welding tool is guided around the single film pouch in order to connect the rigid insert to the head part.

5. The method according to claim 3 , wherein the at least one non-rigid, elongate film pouch comprises at least two film pouches, and
wherein the welding tool is guided around the at least two film pouches together in order to connect the rigid insert of each of the two film pouches to the head part.

6. The method according to claim 1 , wherein a predetermined breaking region is produced in a region of the cover.

7. The method according to claim 6 , wherein the predetermined breaking region of the cover is produced by a laser, by weakening by hot stamping, by scoring, or by welding the cover to the rigid insert.

8. The method according to claim 1 , wherein the rigid insert has at least one material extension.

9. A cartridge for a dispensing device produced using the method according to claim 1 , having:
the at least one non-rigid, elongate film pouch, which has the chamber for receiving the composition,
the head part for interacting with the at least one non-rigid, elongate film pouch, and
the rigid insert, the rigid insert being connected to the at least one non-rigid, elongate film pouch on a side facing the head part and having the passage closed by the cover,
wherein the rigid insert and the head part each have, in mutually facing regions, an interacting and substantially diametrically opposed contour, wherein the cover that is arranged in a region of the contours is weldable.

10. The cartridge according to claim 9 , wherein the contour of the rigid insert and the contour of the head part each have two surfaces arranged at an angle to one another.

11. The cartridge according to claim 10 , wherein the two surfaces of each of the contour of the rigid insert and of the contour of the head part are arranged substantially perpendicularly to one another.

12. The cartridge according to claim 9 , wherein the rigid insert has a stepped raised portion on the side facing the head part,
wherein the stepped raised portion of the rigid insert is received in a receptacle of the head part provided for arrangement of the rigid insert.

13. The cartridge according to claim 9 , wherein the cover has a predetermined breaking region.

14. The cartridge according to claim 9 , wherein the rigid insert is conical on the side facing the head part.

15. The cartridge according to claim 9 , wherein the rigid insert has at least one ventilation opening that is independent of the passage and/or at least one ventilation slot that is independent of the passage, and/or
wherein the passage of the rigid insert has at least one ventilation notch in a region facing a central axis of the at least one non-rigid, elongate film pouch.

16. The method according to claim 8 , wherein the at least one material extension surrounds the passage, and wherein the at least one material extension melts during the closing of the passage.

Assignees

• Hilti Ag

Inventors

• Willner Ralf
• Ayrle Thomas
• Donner Tobias
• Tapov Tihomir

Classifications

• B65D83/771

  for dispensing fluent contents by means of a flexible bag or a deformable membrane or diaphragm · CPC title

• B65D83/7713

  the contents of a flexible bag being expelled by a piston, or a movable bottom or partition provided in the container or the package · CPC title

• B29C66/944

  by controlling or regulating the time · CPC title

• B29C66/71

  characterised by the composition of the plastics material of the parts to be joined (welding bar compositions B29C65/125) · CPC title

• B29C65/368

  with a polymer coating · CPC title