Container and method for making the same
AssigneeFrugalpac Limited
InventorHenry William Slack
Life of this patent
Estimating the term…
Abstract
A method of making a container (2, 30) having a separable inner lining (6) and outer shell (4) comprises the steps of: forming an outer shell; pre-forming a flexible lining, at least a part of the lining conforming to a complete internal shape of the shell; inserting the preformed 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 the opening of the shell; adhering the first part to an internal surface (8) of the shell; conforming the second part to an external surface of the shell; and attaching to the lining around said rim a sealing layer covering the opening, and the adhesion between the lining and the internal surface of the shell being such that the lining is peelable from the shell while remaining intact.
Claims19
A method of making a beverage cup having a separable inner lining and outer shell, the method comprising the steps of:
- forming an outer shell of the beverage cup, the shell being made from a paperboard material;
- pre-forming a flexible lining from a thin sheet of polymeric barrier material, at least a part of the lining conforming to a complete internal shape of the shell, and a thickness of the lining being less than 50 μm;
- applying an adhesive to one of an inner surface of the shell and an outer surface of the flexible lining;
- inserting the pre-formed 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;
- adhering the first part of the lining to the internal surface of the shell by the adhesive;
- and
- conforming the second part of the lining to an external surface of the shell and heating the second part of the lining such that the second part of the lining shrinks around the outside of the shell,
- 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 cup.
A beverage cup having a separable inner lining and outer shell, wherein the beverage cup comprises:
- an outer shell made from a paperboard material;
- and
- an inner lining, the lining comprising a pre-formed flexible lining of a thin sheet of polymeric barrier material, a thickness of the lining being less than 50 μm, a first part of the lining conforming to a complete internal shape of the shell and being adhered to an internal surface of the shell by an adhesive, and a second part of the lining being heat shrunk around an external surface of the shell,
- wherein the adhesive adhering the first part of the lining to the internal surface of the shell is such that the lining is peelable from the shell so that the lining remains intact and no lining remains on the shell, such that the inner lining and outer shell of the cup are fully separated.
A method of making a beverage cup having a separable inner lining and outer shell, the method comprising the steps of:
- forming an outer shell of the cup, the shell being made from a paperboard material;
- pre-forming a flexible lining from a thin sheet of polymeric barrier material, at least a part of the lining conforming to a complete internal shape of the shell and the polymeric barrier material having a thickness of less than 50 μm;
- applying a heat sensitive adhesive to one of an inner surface of the shell and an outer surface of the flexible lining;
- inserting the pre-formed 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;
- adhering the first part of the lining to the internal surface of the shell by applying heat to the shell and the lining to increase the temperature of the heat sensitive adhesive to cause the adhesive to become tacky and adhere the lining to the internal surface of the shell;
- and
- conforming the second part of the lining to an external surface of the shell and heating the second part of the lining such that the second part of the lining shrinks around the outside of the shell,
- 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 cup.
Dependencies are inferred from the claim text.