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. 24, 2005
Filed:
Jul. 02, 2003
Mayumi Ohori, Kawasaki, JP;
Masaru Tanaka, Yokohama, JP;
Haruji Mizuishi, Tokyo, JP;
Hiroyuki Ohkaji, Yokohama, JP;
Kenzo Tatsumi, Yokohama, JP;
Hiroshi Mizusawa, Tokyo, JP;
Ken Amemiya, Tokyo, JP;
Hideki Zenba, Yokohama, JP;
Fumio Kishi, Yokohama, JP;
Mayumi Ohori, Kawasaki, JP;
Masaru Tanaka, Yokohama, JP;
Haruji Mizuishi, Tokyo, JP;
Hiroyuki Ohkaji, Yokohama, JP;
Kenzo Tatsumi, Yokohama, JP;
Hiroshi Mizusawa, Tokyo, JP;
Ken Amemiya, Tokyo, JP;
Hideki Zenba, Yokohama, JP;
Fumio Kishi, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A control system for an image forming device includes a sensor mounted on an optical path unobstructed by elements that are subject to wear for detecting a time varying signal representing reflected light from both a photoconductive element and a transfer sheet internal to the image forming device, a memory storing reference values, and a controller to control an image forming operation based on the reference values stored in the memory and the time-varying signal received from the sensor. The controller reads the time-varying signal from the sensor and compares the time-varying signal read to the reference values to determine a condition of the image forming device.