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:
Apr. 19, 1977
Filed:
Mar. 07, 1975
Applicant:
Inventor:
Ryoichi Namiki, Hino, JA;
Assignee:
Ricoh Co., Ltd., Tokyo, JA;
Primary Examiner:
Int. Cl.
CPC ...
B21B / ; H05B / ;
U.S. Cl.
CPC ...
219469 ; 219216 ; 219470 ; 432 60 ; 432228 ;
Abstract
An image fixing roller having a comparatively long service life and tending to resist the so-called 'offset phenomenon' in which portions of the toner image on one sheet adhere to the roller and are transferred onto the next sheet bearing a toner image. The roller has a radially outer layer made of silicon rubber impregnated with silicon oil which is non-tacky, heat resistant and resilient and has hardness of 20 to 70, tear strength of 10 to 15 kg/cm and tensile strength of below 70 kg/cm.sup.2.