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. 07, 2009
Filed:
Jan. 08, 2008
Hiroshi Yamazaki, Osaka, JP;
Tomohide Hozono, Osaka, JP;
Mitsuhiro Hashimoto, Osaka, JP;
Takeshi Watanabe, Osaka, JP;
Hiroshi Yamazaki, Osaka, JP;
Tomohide Hozono, Osaka, JP;
Mitsuhiro Hashimoto, Osaka, JP;
Takeshi Watanabe, Osaka, JP;
Kyocera Mita Corporation, , JP;
Abstract
An image forming apparatus includes: a plurality of rollers; and an endless belt wound around said rollers, said rollers including: a driving roller which drives said belt wound around said rollers and a driven roller set which is driven by said driving roller via the movement of the endless belt, said driven rollers having one or more metal rollers. At least one of said metal rollers is a smooth roller which satisfies following conditions (i) and (ii); (i) a surface roughness Rz≦2 μm; and (ii) an arithmetic inclination average Δa≦0.06; where said Δa is obtained from an equation (1) below: where L=a reference length taken from a roughness curve; f (x)=a height of the roughness curve at a position x within said reference length L along a lengthwise direction of the roller.