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:
Nov. 03, 1987
Filed:
Aug. 28, 1985
Applicant:
Inventor:
Shigeru Tsutsumi, Yonezawa-shi, Yamgataken, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219421 ; 219426 ;
Abstract
A heater is incorporated in a pointed conical heat-generating means fixed with a projectile heat-generating body. The heater is a ceramic columnar body having a heat resisting and insulating property. Disposed within the ceramic columnar body is a coiled heating wire of which winding diameter is formed as small as possible. Due to discontinuous energizing process of the heater, thermoplastic synthetic resin adjacent a gate can be heated and fused, or cooled and solidified intermittently, thereby the gate communicated with a cavity can be opened or closed effectively.