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:
Dec. 25, 2012
Filed:
Mar. 16, 2010
Yasuhiro Maehata, Kanagawa, JP;
Tetsuji Nishikawa, Tokyo, JP;
Masahiro Ishida, Kanagawa, JP;
Yasuhisa Ehara, Kanagawa, JP;
Noriaki Funamoto, Tokyo, JP;
Jun Yasuda, Chiba, JP;
Yasuhiro Maehata, Kanagawa, JP;
Tetsuji Nishikawa, Tokyo, JP;
Masahiro Ishida, Kanagawa, JP;
Yasuhisa Ehara, Kanagawa, JP;
Noriaki Funamoto, Tokyo, JP;
Jun Yasuda, Chiba, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
A printer according to the present invention is a so-called tandem-type printer, and has a configuration that a motor gear is directly connected to an M-photoconductor driving gear and an idler gear is directly connected to a Y-photoconductor driving gear and the M-photoconductor driving gear. A diameter of the Y and M photoconductors driving gear, a distance between transfer sections of the Y and M photoconductors, a motor gear input angle, and an idler input angle are set so that an absolute value of a value obtained by subtracting 1 from an ideal amplitude ratio, which indicates a ratio of an ideal amplitude of an eccentric component of the Y-photoconductor driving gear to an actual amplitude of an eccentric component of the M-photoconductor driving gear, is equal to or less than a maximum allowable amplitude ratio.