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:
Apr. 17, 1979
Filed:
Mar. 11, 1977
Akira Iwawaki, Yokohama, JP;
Kinshiro Kojima, Kawasaki, JP;
Hisahiko Fukase, Tokyo, JP;
Yoshiharu Shitara, Yokohama, JP;
Akihiro Nomura, Yokohama, JP;
Takehiko Sato, Zushi, JP;
Hideo Shibata, Yokohama, JP;
Ishikawajima-Harima Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A blow molding method and machine and more particularly a method and machine for extruding a multi-layer parison for blow molding, wherein at least two layers of molding plastics, each plastic compensating the poor or undesirable physical and chemical properties of the other plastic and/or each having a different color are forced to flow through different passages having an annular cross sectional configuration, and are joined at the junction of a short passage to be extruded into a multi-layer parison.