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:
Dec. 08, 1998
Filed:
Jan. 26, 1996
Applicant:
Inventors:
Masashi Yano, Sayama, JP;
Yasuyoshi Kawaguchi, Higashiyamato, JP;
Assignee:
Bridgestone Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ; B28B / ;
U.S. Cl.
CPC ...
264444 ; 264 69 ; 264 70 ; 264442 ;
Abstract
Method and apparatus for reducing a shrinkage amount of a rubber member (51) which is comprised of a rubber (3) extruded from an extruder (1). At least one vibrator unit (10a, 10b) applies vibration to the extruded rubber (3) so as to increase the shrinkage speed of the extruded rubber (3) and cause a sufficient advance shrinkage of the extruded rubber within the extrusion train (1), thereby reducing a posterior shrinkage amount of the rubber member (51). An adjustable thermoregulator (30) maintains the extruded rubber (3) at a controlled temperature during application of vibration.