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:
Aug. 24, 2010
Filed:
Mar. 09, 2007
Tomohiro Maeda, Yao, JP;
Tomohiro Maeda, Yao, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A fixing apparatus includes an external heating device which has a halogen lamp and is disposed on the outer surface of a fixing member so that a nip area is provided between the external heating device and the fixing member. A temperature difference between a surface temperature of the external heating device and a surface temperature of the fixing member is controlled in accordance with a length of the nip area in a direction of transport of the recording paper, so that the surface temperature of the fixing roller is maintained to fall within a temperature range in which offset does not occur, the offset being a phenomenon in which part of a toner formed on the recording paper sticks onto the surface of the fixing roller.