Stock material or miscellaneous articles – Circular sheet or circular blank – End closure
Patent
1998-03-13
2000-10-31
Kuhns, Allan R.
Stock material or miscellaneous articles
Circular sheet or circular blank
End closure
428 664, 428218, 4283166, B32B 702
Patent
active
061399345
ABSTRACT:
An injection molded bottle closure with a gradually varying cellular density distribution, whereby the cellular density distribution varies between a first cellular structure of a high density and a second cellular structure of a relatively lower density. The method of forming the injection molded bottle closure comprises forming a mold cavity be engaging a first mold section with a second mold section having a retractable portion, and injecting into the mold cavity an injection mixture which contains a blowing agent. A gradually varying density distribution is created according to a predetermined control function which depends on the mold cavity volume and the injection rate of the injection mixture.
REFERENCES:
patent: 3250417 (1966-05-01), Powers, Jr. et al.
patent: 3922429 (1975-11-01), Welch et al.
patent: 4008820 (1977-02-01), Ruetz
patent: 4089434 (1978-05-01), Tagalakis et al.
patent: 4188457 (1980-02-01), Throp
patent: 4363849 (1982-12-01), Paisley et al.
patent: 4583654 (1986-04-01), Pufpaff et al.
patent: 4879138 (1989-11-01), Johnson et al.
patent: 5480915 (1996-01-01), Burns
patent: 5496862 (1996-03-01), Burns
patent: 5601200 (1997-02-01), Finkelstein et al.
patent: 5649637 (1997-07-01), Weiler
patent: 5692629 (1997-12-01), Burns
patent: 5904965 (1999-05-01), Noel et al.
Gilchrist Michael C.
Kuhns Allan R.
Laurenzo Brian J.
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