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:
Jul. 29, 2003
Filed:
Aug. 06, 2001
Rubber member for use in electrophotographic apparatus and rubber member for separating paper sheets
Hitoshi Shirasaka, Yokohama, JP;
Noriko Abe, Yokohama, JP;
Kouichi Shizuru, Yokohama, JP;
Katsuji Shimabukuro, Tokyo, JP;
Mika Sakatani, Yokohama, JP;
Shuhei Noda, Yokohama, JP;
Hokushin Corporation, Kanagawa, JP;
Abstract
The present invention provides an electrophotography rubber member which has a rebound resilience remaining satisfactorily stabilized over changes in environmental conditions and can serve as a member such as a high-performance cleaning blade and provides a similar sheet-separation rubber member which generates no noise. The electrophotography rubber member or sheet-separation rubber member is formed of a rubber elastomer containing a polyurethane formed from a long-chain polyol containing a polyester-polyol having a number average molecular weight of 500-5,000 and an ester concentration of 2-8 mmol/g, wherein the ester concentration is defined by the following relationship: Ester concentration (mmol/g)=(Amount by mol of ester groups)/(Weight of the polyester-polyol).