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:
Jan. 25, 2005
Filed:
May. 22, 2003
Atsuo Hirose, Nagoya, JP;
Hidetoshi Yano, Toukai, JP;
Atsuo Hirose, Nagoya, JP;
Hidetoshi Yano, Toukai, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
Provided is an image forming apparatus that is capable of reducing noise ascribable to wind noise of fans by performing control of the rotation speed of each cooling fan even during a print process. After power-on at timing T, when a fixing temperature reaches a waiting temperature (timing T) or after a print process is finished (timings T, T, and T), a laser printerenters a ready mode and a sub-fan and a power supply fan are driven to rotate at middle speed. From the start of a print process performed for the first time (timing T), until timing Tat which a counter X has counted four minutes, each fan is driven to rotate at middle speed during the print process (timings Tto Tand Tto T). After the, each fan is driven to rotate at high speed (timings Tto Tand Tto T). Then, when a counter Y has counted a time period set for the ready mode and then a counter Z has counted a time period set for a sleep mode, the counter X is reset. Following this, the counter X restarts counting when a print process is started for the first time after the resetting.