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:
Jun. 29, 1999
Filed:
Jul. 18, 1997
Yoshiyuki Kimura, Tokyo, JP;
Hiroshi Hosaka, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus including a fixing roller and a pressure roller in which a temperature of the fixing roller and/or the pressure roller is changed differently depending on an operation mode. In particular, the temperature of the fixing roller and/or pressure roller of an operation of a non-full color mode is changed to a lesser degree than that of a full color mode operation. In another embodiment of the present invention, the temperature of the fixing roller is set to an appropriate value when an environment temperature sensor is not working properly, to produce high quality images. In yet another embodiment according to the present invention, the temperature of the fixing roller is set to an appropriate value, when an image forming apparatus is turned off for a predetermined period of time, to produce high quality images.