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:
May. 05, 2015
Filed:
Jun. 15, 2012
Junshin Sakamoto, Ibaraki, JP;
Junshin Sakamoto, Ibaraki, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
An image forming apparatus includes a patch forming unit configured to form a patch group containing patch subgroups arranged in a sub-scanning direction. Each of the patch subgroups contains a reference color patch and a color patch of a different color. The reference color patches are shifted from each other in a main-scanning direction. The color patches are shifted from each other in the main-scanning direction. The patch subgroups include reference patch subgroups in each of which the reference color patch covers over the color patch and detection patch subgroups in each of which at least part of the color patch does not overlap with the reference color patch. Center positions of non-overlapping portions of the color patches that do not overlap with the reference color patches in the main-scanning direction are located at substantially a same position in the patch group.