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1. WO2013008024 - CONTAINER AND METHOD FOR MAKING THE SAME

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS

1 . A method of making a container having a separable inner lining and outer shell, the method comprising the steps of:

- forming an outer shell of the container, the shell being made from a paperboard or plastics material;

pre-forming a flexible lining from a thin sheet of barrier material, at least a part of the lining conforming to a complete internal shape of the shell;

inserting the pre-formed lining into the shell; and

- adhering the lining to an internal surface of the shell using an activated adhesive;

wherein, as the lining is inserted into the shell the adhesive is in a non-activated state and after the lining has been inserted into the shell the adhesive is activated to cause the adhesive to become tacky and adhere the lining to the shell, the adhesion between the lining and the internal surface of the shell being such that the lining can subsequently be peeled away from the shell, so that the lining remains intact and no lining remains on the shell, to fully separate the inner lining and outer shell of the container.

2. A method as claimed in Claim 1 , wherein the lining is adhered to the internal surface of the shell over the whole surface of a base and side wall of the shell.

3. A method as claimed in Claim 1 or Claim 2, wherein the step of pre-forming the lining comprises folding a sheet of a thin film plastics material and bonding said sheet along at least one edge.

4. A method as claimed in Claim 3, wherein the sheet of a thin film plastics material is bonded along at least one edge to form a bag.

5. A method as claimed in any preceding claim, wherein the step of preforming the lining comprises providing a male former, an end portion of the male former having substantially the same dimensions as the internal dimensions of the shell, and conforming at least a part of the lining to the shape of the male former.

6. A method as claimed in Claim 5, wherein the step of conforming a part of the lining to the shape of the male former comprises heating a part of the lining.

7. A method as claimed in Claim 6, wherein the step of heating a part of the lining comprises heating an end portion of the lining to a temperature such that the end of the lining shrinks so as to conform to the shape of an end of the male former.

8. A method as claimed in any preceding claim, wherein the step of adhering the lining to an internal surface of the shell comprises applying the adhesive to an external surface of the lining before the lining is inserted into the shell.

9. A method as claimed in any of Claims 1 to 7, wherein the thin sheet of barrier material used to pre-form the lining is pre-coated with the adhesive before forming the lining.

10. A method as claimed in any of Claims 1 to 7, wherein the adhesive is applied to the internal surface of the shell before the lining is inserted.

1 1 . A method as claimed in any preceding claim, wherein the adhesive is a heat activated adhesive.

12. A method as claimed in Claim 1 1 , wherein the step of adhering the lining to an internal surface of the shell comprises heating the adhesive to a temperature at which the adhesive becomes tacky.

13. A method as claimed in any of Claims 1 to 10, wherein the adhesive is a pressure activated adhesive.

14. A method as claimed in any of Claims 1 to 10, wherein the adhesive is activated by one of UV light, infrared light or microwaves.

15. A method as claimed in any preceding claim, wherein the step of inserting the lining into the shell comprises inserting a male former into the shell, the male former having substantially the same dimensions as the internal dimensions of the shell, so that the lining is pressed against the internal surfaces of the shell.

16. A method as claimed in any preceding claim, wherein the method further comprises applying a partial vacuum between the lining and the shell, when the lining is inserted in the shell, to draw the lining towards the internal surface of the shell.

17. A method as claimed in any preceding claim, wherein a male former is used to insert the lining into the shell, and the method further comprises the step of blowing the lining away from the male former towards the internal surface of the shell when the lining is positioned inside the shell.

18. A method as claimed in any preceding claim, wherein the method comprises:

inserting the lining into the shell so that a first part of the lining is within the shell and a second part of the lining protrudes from an opening of the shell; and conforming the second part of the lining to an external surface of the shell.

19. A method as claimed in Claim 18, wherein the method further comprises, once the lining has been inserted into the shell, the step of folding the second part of the lining over a rim of the opening such that the second part of the lining is adjacent the external surface of the shell.

20. A method as claimed in Claim 18 or Claim 19, wherein the step of conforming the second part of the lining to the external surface of the shell comprises heating the second part of the lining such that the second part of the

lining shrinks around the outside of the shell.

21 . A method as claimed in any of Claims 18 to 20, wherein the method further comprises applying an adhesive to a region of the external surface of the shell around the opening, so that the second part of the lining is adhered to the shell in this region.

22. A method as claimed in any of Claims 18 to 21 , wherein the method further comprises forming perforations in a portion of the second part of the lining.

23. A method as claimed in any preceding claim, wherein the outer shell is substantially conical or frustoconical.

24. A method as claimed in any preceding claim, wherein the outer shell is a non-laminated paper cup.

25. A method as claimed in any of Claims 1 to 22, wherein the outer shell is cylindrical.

26. A method as claimed in any preceding claim, wherein the lining is made from polyethylene.

27. A method as claimed in any preceding claim, wherein the method further comprises the step of printing a graphic on the internal surface of the shell.

28. A method as claimed in any preceding claim, wherein the thickness of the lining is no more than half the thickness of the shell.

29. A method as claimed in any preceding claim, wherein the thickness of the lining is less than 50 μιτι.

30. A method as claimed in any preceding claim, wherein the container is a disposable cup.

31 . A method as claimed in any of Claims 1 to 29, wherein the container is a paint pot.

32. A container having a separable inner lining and outer shell, the container comprising:

an outer shell made from a paperboard or plastics material;

- a pre-formed flexible lining made from a thin sheet of barrier material, at least a part of the lining conforming to a complete internal shape of the shell; and an adhesive layer between the lining and the shell, the adhesive being an activated adhesive,

wherein the adhesion between the lining and the internal surface of the shell is such that the lining can subsequently be peeled away from the shell, so that the lining remains intact and no lining remains on the shell, to fully separate the inner lining and outer shell of the container.