Title: Sealed closure system for containers

Abstract: Containers of the open top can type are closed and sealed by a closure system comprising an inner lid of thin material such as plastic film and a stiff outer cover which grips the container and bears down on the inner lid flange to hold it securely in closed, sealing position. Optional provision is made for the escape of air during insertion of the inner lid and retention of the lid in position pending application of the outer cover.

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Inventors: Simmons, Richard J. (Carol Stream, IL, US)

Application Number: 542504
Filing Date: 1975-01-20
Publication_date: 1976-03-02
Assignee: Plastofilm Industries, Inc. (Wheaton, IL)
Primary Class(es): 220/256.1 220/366.1, 220/507, 220/785
Other Classes:
US Patent Ref:

2528948	Nov, 1950	Cosmo	220/352.
3167079	Jan, 1965	Weil	220/23.
3381872	May, 1968	Holder et al.	220/366.
3482729	Dec, 1969	Penton	220/23.

Other Refs:
Primary Examiner: Hall, George T.
Assistant Examiner:
Attorney: Darbo, Robertson & Vandenburgh