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:
Sep. 13, 1977
Filed:
Mar. 09, 1977
Applicant:
Inventors:
Kazuo Kudo, Tokyo, JA;
Takashi Mizutani, Tokyo, JA;
Assignee:
Toppan Printing Co., Ltd., Tokyo, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
4251331 ; 264173 ; 425381 ; 425462 ; 425466 ; 425532 ;
Abstract
A multilayer parison extrusion molding machine for blow molding which is characterized in that a main extruder and one or more sub-extruders are radially attached to special diehead and said die head comprises a core holder having a core pin at the lower end; a cylindrical mandrel enclosing said core holder; a plurality of sleeves surrounding said mandrel; housings surrounding said sleeves respectively; one or more pressure rings controlling the space in molten resin passages; pressure ring adjusting screws; an extrusion die; and a die adjusting screw.