Image forming apparatus including fuser unit for fixing developer image on recording medium

Patent metadata

Field	Value
Publication number	US-9188917-B2
Application number	US-201213358936-A
Country	US
Kind code	B2
Filing date	Jan 26, 2012
Priority date	Jan 26, 2011
Publication date	Nov 17, 2015
Grant date	Nov 17, 2015

Abstract

An image forming apparatus includes: a fuser unit, which includes a heating member heated by a heat source and a backup member; a temperature detector; and a control unit, which starts print control when a detected temperature reaches the fixing temperature while the temperature of the heating member is increasing to a fixing temperature, and which performs decreasing control when the detected temperature reaches a predetermined temperature higher than the fixing temperature. In a case that an increasing rate of the detected temperature at the beginning of the print control is equal to or less than a predetermined value, the control unit controls the heat source so that a heat quantity radiated from the heat source during the decreasing control becomes larger than that in the case that the increasing rate of the detected temperature at the beginning of the print control is larger than the predetermined value.

First claim

What is claimed is:

1. An image forming apparatus comprising:
a fuser unit, which includes a heating member, a heat source configured to heat the heating member, and a backup member configured to nip a recording sheet between itself and the heating member;
a temperature detector, which is configured to detect a temperature of the heating member; and
a control unit, which is configured to start print control when the temperature detected by the temperature detector reaches a fi…

Assignees

• Yasuda Masaki
• Brother Ind Ltd

Inventors

• Yasuda Masaki

Classifications

• G03G15/205

  Physics · mapped topic

• G03G15/2039

  Physics · mapped topic

• G03G15/2046 Primary

  Physics · mapped topic

• G03G15/2078

  Physics · mapped topic