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:
Apr. 19, 2005
Filed:
Aug. 27, 2002
Masahiro Yagi, Chiyoda, JP;
Kazutaka Sato, Kashiwa, JP;
Kenji Asuwa, Toride, JP;
Isao Nakajima, Hitachinaka, JP;
Masahiro Yagi, Chiyoda, JP;
Kazutaka Sato, Kashiwa, JP;
Kenji Asuwa, Toride, JP;
Isao Nakajima, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Printing Solutions, Ltd., Tokyo, JP;
Abstract
An image forming apparatus, having imaging units arranged alternately on both sides of a continuous paper web, is characterized by minimized image misregistration and reduced processing cost. In order to prevent possible color misregistration caused by changes in paper feed path length resulting from the eccentricity of each drive roller, the difference in the eccentric phases of the rollers on the front and back surfaces is controlled, thereby minimizing the difference in changes in paper feed path length.