Container made of paper

Patent metadata

Field	Value
Publication number	US-12421006-B2
Application number	US-202118041172-A
Country	US
Kind code	B2
Filing date	May 27, 2021
Priority date	Aug 11, 2020
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

A container for holding a fluid is disclosed. The container comprises an inner sleeve having a first opening and a second opening opposite the first opening, and an outer sleeve having a third opening and a fourth opening opposite the third opening. The inner sleeve and the outer sleeve are made of paper. The first opening has a first reinforcing element which extends into the first opening, and the third opening has a second reinforcing element which extends into the third opening. Further, the container comprises a functional insert. The outer sleeve has a larger diameter than the inner sleeve so that the inner sleeve is insertable into the outer sleeve through the fourth opening such that the insert is fastened between the first reinforcing element and the second reinforcing element.

First claim

The invention claimed is:

1. A container for holding a fluid, the container comprising:
an inner sleeve having a first opening and a second opening opposite the first opening;
an outer sleeve having a third opening and a fourth opening opposite the third opening;
wherein the inner sleeve and the outer sleeve are made of paper,
wherein the inner sleeve comprises at the first opening a first reinforcing element which extends into the first opening,
wherein the outer sleeve comprises at the third opening a second reinforcing element which extends into the third opening;
a functional insert,
wherein the outer sleeve has a larger diameter than the inner sleeve so that the inner sleeve is insertable into the outer sleeve through the fourth opening such that the insert is fastened between the first reinforcing element at the first opening and the second reinforcing element at the third opening,
wherein the inner sleeve forms a shorter length in a longitudinal direction than the outer sleeve, so that an area is formed between the first reinforcing element and the second reinforcing element in an interior of the outer sleeve, which is configured such that the functional insert is arranged and fastened within the area.

2. The container according to claim 1 ,
wherein the diameter of the inner sleeve and the diameter of the outer sleeve are configured such that an outer surface of the inner sleeve and an inner surface of the outer sleeve are frictionally coupled to each other.

3. The container according to claim 1 ,
wherein the diameter of the inner sleeve and the diameter of the outer sleeve are configured such that an outer surface of the inner sleeve and an inner surface of the outer sleeve are coupleable to each other in a substance-to-substance bonded manner.

4. The container according to claim 1 , further comprising:
a closure element for closing at least one of the second opening of the inner sleeve and the fourth opening of the outer sleeve.

5. The container according to claim 4 ,
wherein the closure element comprises a head disk,
wherein the head disk is fastened to at least one of the inner sleeve and the outer sleeve such that the second opening and the fourth opening are closed.

6. The container according to claim 5 ,
wherein the closure element comprises a further outer sleeve which is closed on one side by the head disk in such a way that the closure element is slipped over the second opening and the fourth opening.

7. The container according to claim 6 ,
wherein the further outer sleeve and the head disk are made of paper.

8. The container according to claim 6 ,
wherein the further outer sleeve comprises a third reinforcing element which extends into the sixth opening,
wherein the head disk is coupled to the portion of the third reinforcing element extending into the interior of the further outer sleeve.

9. The container according to claim 6 ,
wherein the diameter of the outer sleeve and the diameter of the further outer sleeve are configured such that an outer surface of the outer sleeve and an inner surface of the further outer sleeve are frictionally coupled to each other.

10. The container according to claim 1 ,
wherein a predetermined breaking point is formed in at least one of the inner sleeve and the outer sleeve such that a tool-free separation of at least one of the first sleeve and the second sleeve is providable.

11. The container according to claim 10 ,
wherein the predetermined breaking point forms a region of the inner sleeve and/or the outer sleeve which is less robust than a region of the corresponding inner sleeve and/or the outer sleeve surrounding the predetermined breaking point.

12. The container according to claim 11 ,
wherein the predetermined breaking point comprises at least one of a notch, a perforation, a scribe mark, a spatially limited embrittled region and a material taper.

13. The container according to claim 1 ,
wherein at least one of the first reinforcing element and the second reinforcing element comprises a bead.

14. The container according to claim 1 ,
wherein at least one of an outer surface of the inner sleeve and an inner surface of the inner sleeve is provided with a coating, and/or
wherein at least one of an outer surface of the outer sleeve and an inner surface of the outer sleeve is provided with a coating.

15. The container according to claim 1 ,
wherein at least one of the inner sleeve and the outer sleeve consists of a plurality of layers.

16. The container according to claim 1 ,
wherein at least one of the inner sleeve and the outer sleeve is a spirally wound sleeve.

17. The container according to claim 1 ,
wherein the functional insert comprises a bag member for holding a fluid and a support member to which the bag member is attached,
wherein the bag member extends from the support member into the interior of the first sleeve.

18. The container according to claim 17 ,
wherein the bag member is designed to be elastically deformable such that the bag member is expandable by means of the fluid inside the bag member.

19. The container according to claim 1 ,
wherein the functional insert comprises a valve insert through which a fluid inside the first sleeve is selectively dischargeable.

Assignees

• Tunap Gmbh & Co Kg
• Chemiefaser Lenzing Ag

Inventors

• Hofmann André
• Gruner Jochen
• Herold Steffen

Classifications

• B65D3/22

  with double walls; with walls incorporating air-chambers; with walls made of laminated material {(for thermal insulating purposes B65D81/3818)} · CPC title

• B65D3/04

  essentially cylindrical · CPC title

• B65D83/62

  by membranes, bags or the like · CPC title

• B65D83/38

  Details of the container body (pressure relief devices B65D83/70) · CPC title

• B65D2565/385

  especially suited for or with means facilitating recycling · CPC title