The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 10, 1987
Filed:
Feb. 24, 1983
Applicant:
Inventors:
Osamu Yamamoto, Hiratsuka, JP;
Muneki Yamada, Fujisawa, JP;
Assignee:
Toyo Seikan Kaisha, Limited, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
264318 ; 264322 ; 425D / ;
Abstract
A plastic cap is made by introducing an upper plunger formed with a thread groove and a lower plunger into the cavity of a die, while compressing a molten plastic stock between the upper and lower plungers, with the upper plunger sliding along the inner peripheral surface of a holding pad which is held in contact with the upper surface of the die, whereby the skirt portion of the cap is formed by the material of the plastic stock flowing out from between the first and second plungers into between the first plunger and the inner peripheral surface of the die cavity.