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:
Jan. 05, 1988
Filed:
Oct. 24, 1986
Takao Motonaga, Hiroshima, JP;
Keizi Fukuhara, Hiroshima, JP;
Tadashi Tamura, Yokosuka, JP;
Toshiji Yoshida, Yokohama, JP;
Mazda Motor Corporation, Hiroshima, JP;
Japan Steel Works, Tokyo, JP;
Abstract
Extrusion molding equipment for a multi-layer parison which includes an accumulator head, a cylindrical member disposed in the accumulator head and having a temperature control device for controlling a chief resin material temperature wise, a ringed piston reciprocable along the inner peripheral surface of the cylindrical member, a core member coaxially disposed inside the ringed piston and at least one ringed member coaxially disposed within an annular resin passage defined between the cylindrical member and the core member, into which resin passage the chief resin material is forcibly supplied from an accumulator composed of the ringed piston and a hydraulic cylinder operating the ringed piston, with one or more annular nozzles being defined in the ringed member for extruding one or more auxillary resin materials.