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:
Jul. 09, 2002
Filed:
Apr. 18, 2000
Toshiya Sato, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A color image forming apparatus capable of efficiently sensing a color deviation and accurately correcting for it is disclosed. The apparatus includes mark sensing device for sensing register marks on a conveyor belt for determining deviations between colors, a first storage device for storing data representative of the results of past color deviation sensing operations, a recognizing device which recognizes a condition inside the apparatus (e.g. temperature), and a second storage device which stores deviations sensed by the mark sensing device and the apparatus condition in which the deviation occurred. The apparatus will correct for a color deviation on the basis of the stored data in the first storage device. In addition, the timing for executing a sensing operation is determined on the basis of the data stored in the second storage device. Thus the apparatus can execute efficient correction with a minimum frequency of correction in accordance with the variation of the above stored data.