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:
Oct. 15, 1985
Filed:
Feb. 14, 1983
Takuzo Takada, Ojima, JP;
Yoshino Kogyosho Co., Ltd., Tokyo, JP;
Abstract
An apparatus for biaxial-blow-molding a hollow bottle-shaped container of a synthetic resin which has a bottom mold having an upper surface becoming the bottom mold surface of the bottle-shaped container and a cylinder chamber formed therein, a bottom protruding pin having an upper end face forming part of the bottom mold surface of the bottom mold and a piston portion formed at the bottom end thereof and telescopically moved back and forth in the cylinder chamber of the bottom mold, and an elastic member disposed in the cylinder chamber of the bottom mold for urging the bottom protruding pin forwardly when the member is contacted with the piston portion of the bottom protruding pin in such a manner that the tension of the member is weaker than the pressure of compressed air to be blown into the molds. This apparatus is operated by a method of biaxial-blow-molding the hollow bottle-shaped container of a synthetic resin of the invention. Thus, the bottom of the blow-molded piece or parison adhered to the bottom of the blowing mold at the time of blow-molding can be readily released from upon opening of the split molds after the piece is completely blow-molded.