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:
Jun. 11, 2019
Filed:
Nov. 27, 2017
Brother Kogyo Kabushiki Kaisha, Nagoya-shi, Aichi-ken, JP;
Kenichi Iesaki, Ichinomiya, JP;
BROTHER KOGYO KABUSHIKI KAISHA, Nagoya-shi, Aichi-ken, JP;
Abstract
An image formation apparatus includes a fixing device, a heater driver, and a controller. The fixing device includes: a heater; a heating member; and a temperature sensor which outputs a signal depending on a temperature of the heater or the heating member. When a target temperature of the heater or the heating member changes from a first target temperature to a second target temperature lower than the first target temperature and before a detection temperature becomes equal to or lower than a first switching temperature which is equal to or lower than the second target temperature, the controller sets control value of the heater by on/off control or proportional control. After the detection temperature becomes equal to or lower than the first switching temperature, the controller sets control value of the heater by proportional-integral control.