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:
Aug. 24, 1999
Filed:
Dec. 15, 1997
Applicant:
Inventors:
Mikio Uchiyama, Chiba, JP;
Tatsuo Suzuki, Tokyo, JP;
Assignee:
Tahara Machinery Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
4251 / ; 425526 ; 264403 ; 264457 ; 264478 ; 264486 ; 264535 ;
Abstract
A preform heating method for heating a preform for a stretch blow molding is executed by an apparatus which comprises an outer heating die having a cavity for the preform, a thermal-insulating pot surrounding the outer heating die and a high-frequency heating unit installed around to the thermal-insulating pot. The heating of the preformed is executed by locating the heating die around the preform, applying alternating magnetic flux to the heating die to heat the preform through the heating die, and controlling the magnitude of the alternating magnetic flux to control the temperature of the preform.