Title: Self-venting end unit for pressure packaging

Abstract: An end unit intended for packaging products in an associated can or container wherein the product is of the type producing gases so as to normally increase the internal pressure within the can after the closing of the can. The end unit has a vent opening therethrough and is normally closed by a closure member which is held in contact with the container wall surrounding the vent opening by a strip of stretchable material having a memory. When pressure within the container exceeds a predetermined pressure, the closure will move out of the container sealing position under the restraint of the strip, and the container will be vented to the atmosphere.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Pan, Peter N. Y. (Country Club Hills, IL, US)

Application Number: 921037
Filing Date: 1978-06-30
Publication_date: 1980-07-01
Assignee: The Continental Group, Inc. (New York, NY)
Primary Class(es): 220/203.15 215/260, 215/310, 220/231, 220/DIG19, 426/118, 426/131, 426/316, 426/419
Other Classes:
US Patent Ref:

2173571	Sep, 1939	Jesnig	220/231.
2224296	Dec, 1940	Hoffman	220/231.
2242966	May, 1941	Burkardt	220/367.
2301212	Nov, 1942	Jones	220/203.
2429984	Nov, 1947	Berglund	220/367.
2933102	Apr, 1960	Hillman et al.	220/367.
3369859	Feb, 1968	Cornelius	206/213.
3621876	Nov, 1971	Campbell	220/209.
3716180	Feb, 1973	Bemiss et al.	220/367.

Other Refs: 2341905405180414284

Feb, 1975	DE
Dec, 1965	CH
Aug, 1934	GB

Primary Examiner: Man-Fu Moy, Joseph
Assistant Examiner:
Attorney: Brown; Charles E.