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. 03, 2007
Filed:
Aug. 10, 2004
Toshiaki Kagawa, Nara, JP;
Hiroshi Kida, Yamatokoriyama, JP;
Takashi Yamanaka, Yamatokoriyama, JP;
Tetsunori Mitsuoka, Tondabayashi, JP;
Toshiaki Kagawa, Nara, JP;
Hiroshi Kida, Yamatokoriyama, JP;
Takashi Yamanaka, Yamatokoriyama, JP;
Tetsunori Mitsuoka, Tondabayashi, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
Within a fixing roller () are disposed a main heater lamp () for heating a central portion of the fixing roller and a sub-heater lamp () for heating opposite end portions of the fixing roller. MRnh, SRnh and ΣRnh satisfy the formula (1) or (2):Σ≧30.5·()+382  formula (1)≦−21.9·()−198,  formula (2)where MRnh is a mean value of heat distribution in a no-heat generating section of the main heater lamp; SRnh is a mean value of heat distribution in the a no-heat generating section of the sub-heater lamp; ΣRnh is the sum total of these mean values; and Ht=vp/(Mh·λ) where vp is a fixing speed (m/s), Mh a heat capacity per unit length of the heating member (J/(° C.·m)) and λ a heat conductivity of a material forming the heating member (W/(m·° C.)).