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.

Date of Patent:
Mar. 18, 1997

Filed:

Apr. 28, 1994
Applicant:
Inventors:

Tsuneo Kurihara, Sayama, JP;

Katsushige Kusaka, Sayama, JP;

Teruo Ichikawa, Sayama, JP;

Hiromi Tanaka, Sayama, JP;

Toshiyuki Higashi, Sayama, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ; B29C / ;
U.S. Cl.
CPC ...
425533 ; 26432812 ; 26432813 ; 264572 ; 425546 ; 425812 ;
Abstract

A molding apparatus for producing a synthetic resin molded product including a forming mold with a molding cavity, a gate communicating with the cavity, and an overflow chamber communicating with the cavity through a flow-out passage, a gas blow-in mechanism for blowing gas into molten synthetic resin which has been injected into the cavity through the gate so as to form a void in the molten synthetic resin in the cavity to mold a hollow product and a flow-out passage opening and closing mechanism for closing the flow-out passage until the molten resin fills the molding cavity and opening the flow-out passage when the gas blow-in mechanism is in operation.


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