04117950 is referenced by 12 patents and cites 6 patents.

A flexible, one-piece molded plastic closure having a circular outer rim and a center panel. The center panel has thin panel portions bounded by radially extending rib portions, the panel portions and the rib portions being integrally joined to the outer rim.

The method of molding the closure and tooling used therefor are also disclosed. During the molding of a closure, molten plastic flows radially along channels formed in the tooling to chamber portions forming the rim. Plastic remaining in the channels cools to form the ribs. The panel parts between the ribs are formed from plastic flowing from the channels.

Title
Plastic closure
Application Number
5/843513
Publication Number
4117950
Application Date
October 19, 1977
Publication Date
October 3, 1978
Inventor
David O Allen
Wilmington
OH, US
Agent
Dybvig & Dybvig
Assignee
Buckeye Molding Company
OH, US
IPC
B65D 41/16
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