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:
Jan. 09, 2007
Filed:
Aug. 30, 2000
Yoshio Takizawa, Tokyo, JP;
Yuichiro Mori, Kanagawa, JP;
Shu Inoue, Kanagawa, JP;
Ryuta Tanaka, Kanagawa, JP;
Yoshio Takizawa, Tokyo, JP;
Yuichiro Mori, Kanagawa, JP;
Shu Inoue, Kanagawa, JP;
Ryuta Tanaka, Kanagawa, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
The present invention provides an improved elastic material which is free of roller abrasion when used in development rollers and overcomes disadvantages of the conventional silicone rollers of deterioration in the abrasion resistance, an elastic roller employing such elastic materials, and an electrophotographic apparatus and electrostatic recording apparatus incorporating such rollers. The elastic material satisfies a relationship represented by the following equation:log{()}≦−0.0011()+0.1154()−5.6where Tb is the tensile strength (N/mm), Eb is the tension fracture elongation (%) and Hd is the Asker C hardness (°). Further, the present invention provides a novel developer carrier for use with an imaging apparatus and an imaging apparatus incorporating the developer carrier. The developer carrier includes an electrically conductive elastic layer and is arranged in contact with, or in the proximity of, an imaging body. In the developer carrier, the conductive elastic layer satisfies the equation:0.01≦≦2.0where S is the compressive permanent set (%), T is the thickness of the elastic layer (mm), and Hd is the Asker C hardness (°).