Patent ID: 9533799
Date: 2017-01-03
CPC Classifications: B65D

Claim:
1. A method of covering an open end of a food container, the method comprising: positioning a sealing membrane having an upper surface, an outer external edge, and a lower surface between a lid having a top closure wall and a depending skirt and a rim surrounding the open end of the food container and having an uppermost edge defined by a radial thickness; induction sealing the sealing membrane to the rim of the food container with one or more radial sealing gaps extending continuously straight across the entire radial thickness of the rim between the uppermost edge of the rim of the food container and the lower surface of the sealing membrane to permit venting between the rim and the sealing membrane; and aligning one or more recesses formed in an inward surface of the depending skirt of the lid and/or an outward surface of the rim of the container body with the one or more radial sealing gaps between the rim of the food container and the sealing membrane to relieve pressure between the lid, the rim and the sealing membrane at the radial sealing gaps during induction sealing.