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. 17, 2012
Filed:
May. 22, 2009
Takashi Yamanaka, Osaka, JP;
Atsushi Ide, Osaka, JP;
Kimihide Tsukamoto, Osaka, JP;
Hiroshi Nakatani, Osaka, JP;
Takashi Yamanaka, Osaka, JP;
Atsushi Ide, Osaka, JP;
Kimihide Tsukamoto, Osaka, JP;
Hiroshi Nakatani, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In one embodiment of the present invention, a fixing apparatus that causes a recording material to pass through a nip portion formed by a rotating heat roller and a rotating pressure roller being in contact so as to perform a fixing operation is configured including a pressing mechanism that can switch between a pressure applied state in which the pressure roller presses against the heat roller using a bias and a pressure cancelled state in which the pressure is cancelled, a pressure state detection unit, and a control unit that performs a pressure cancelation operation and a pressure application operation. If the pressure state detection unit does not detect the pressure cancelled state even when the control unit has performed pressure cancellation control for a certain time period with respect to the pressing mechanism in the pressure applied state, the control unit permits a fixing operation in only the pressure applied state after performing pressure application control for a certain time period with respect to the pressing mechanism.