Patent ID: 9676531
Date: 2017-06-13
CPC Classifications: B65D

Claim:
1. A membrane for sealing an open spout of a food package, comprising a central circular disc member, an outer annular disc member connected to said central circular disc member along an inner periphery of the outer annular disc member at a connection angle, the outer annular disc member possessing an outer diameter, a resilient tubular portion possessing a first open end and a second end, the tubular portion being connected to the outer annular disc member, the second end of the tubular portion possessing an outer diameter smaller than the outer diameter of said outer annular disc member, the outer annular disc member being pivotable relative to the central circular disc member to increase the outer diameter of the second end of said tubular portion by changing said connection angle, the membrane being configured to seal the open spout of the food package so that a food product enclosed within the food package is sealed from an outer environment, and the first open end being free and spaced from the outer annular disc member, the first open end possessing an outer diameter, and the tubular portion possessing a tapered wall profile such that the outer diameter of the first open end is larger than the outer diameter of the second end.