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:
Feb. 06, 2007
Filed:
Sep. 12, 2003
Hitoshi Ishibashi, Kanagawa, JP;
Takayuki Maruta, Kanagawa, JP;
Yuuji Sawai, Kanagawa, JP;
Takahiro Yoshikawa, Kanagawa, JP;
Atsushi Takehara, Kanagawa, JP;
Hitoshi Ishibashi, Kanagawa, JP;
Takayuki Maruta, Kanagawa, JP;
Yuuji Sawai, Kanagawa, JP;
Takahiro Yoshikawa, Kanagawa, JP;
Atsushi Takehara, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus of the present invention disclosed is of the type sequentially transferring toner images from a plurality of photoconductive drums to a sheet being conveyed by an image transfer belt or an intermediate image transfer belt one above the other with bias applying members to thereby form a composite color image. Backup rollers, contacting the inside surface of the belt, each have volumetric resistivity of 10Ω·cm or above and ten-point mean surface roughness Rz of 6 μm or above.