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:
Nov. 15, 2005
Filed:
Mar. 25, 2003
Seiichi Senda, Nagoya, JP;
Seiichi Senda, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
A thermal fixing device is equipped with a plurality of heaters for heating a fixing member at different axial positions thereof for proper temperature control. When the difference between the center temperature Tand the end temperature Texceeds a proper temperature difference range (15° C.), of the center temperature Tand the end temperature T, the one nearer to the average temperature Tof the fixing upper limit temperature Tand the fixing lower limit temperature T. is selected. The control value for the farther halogen lamp is changed so as to approach the selected temperature. When the temperature difference is 10° C. or less, the control value is further changed. With this process, it is possible to set both the temperatures and the portion near the center of the thermal roller to temperatures within the proper temperature range.