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. 22, 2009
Filed:
Apr. 12, 2007
Yoshiteru Kikuchi, Yamatokoriyama, JP;
Yoshikazu Harada, Nara, JP;
Norio Tomita, Nara, JP;
Kengo Matsuyama, Chiba, JP;
Yutaka Eba, Tenri, JP;
Tetsushi Ito, Nara, JP;
Yoshiteru Kikuchi, Yamatokoriyama, JP;
Yoshikazu Harada, Nara, JP;
Norio Tomita, Nara, JP;
Kengo Matsuyama, Chiba, JP;
Yutaka Eba, Tenri, JP;
Tetsushi Ito, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A color image forming apparatus including: a plurality of drum-type photoconductors for forming an image in a different color on each peripheral surface and the photoconductors having at least two different diameters; a plurality of driving sections for driving each photoconductor at a driving speed in accordance with the diameter so that each photoconductor rotates at a predetermined peripheral speed; a correction signal output section for outputting a speed correction signal to correct a periodic pitch fluctuation included in each formed image; and a drive control section for controlling the driving section to correct the driving speed of each photoconductor by the speed correction signal, wherein the speed correction signal is a signal having the same cycle as a rotational cycle of each photoconductor.