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US 12,172,798 B2Granted
Peelable resealable membrane for containers
AssigneeSonoco Development, Inc.
InventorScott William Huffer
Life of this patent
Estimating the term…
Abstract
The invention comprises a peelable membrane for resealably closing a metal end comprising an outer layer, a tacky layer, and a heat seal layer. The heat seal layer is permanently sealed to the metal end to cover at least one opening in the metal end. The tacky layer causes the peelable membrane to be resealable onto the metal end.
Claims11
A method for manufacturing a metal container end having a peelable membrane comprising:
- coextruding a first layer, a tacky layer, and a heat seal layer to form a peelable membrane sheet to form a coextruded film;
- applying adhesive to one of an inner surface of an outer layer and an outer surface of a barrier layer;
- laminating the outer layer and the barrier layer to form a laminate;
- applying an adhesive to one of an outer surface of the coextruded film, opposite the heat seal layer, and an inner surface of the laminate opposite the outer layer;
- laminating the laminate and the coextruded film to form the peelable membrane sheet;
- heating a metal end which defines at least one opening;
- applying the peelable membrane sheet to the heated metal end such that it covers the at least one opening;
- applying pressure to one of the peelable membrane sheet and the metal end to seal the peelable membrane sheet to the metal end;
- and
- scoring the peelable membrane sheet which is affixed to the metal end to form a metal container end having a peelable membrane lid and a tab.
7 more elements
Dependencies are inferred from the claim text.