US 11,054,770 B2
Image forming apparatus and image heating apparatus that control heating amounts of a region in which an image is formed and a region in which an image is not formed
Atsushi Iwasaki, Susono (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Feb. 14, 2020, as Appl. No. 16/791,011.
Application 16/791,011 is a continuation of application No. 16/378,180, filed on Apr. 8, 2019, granted, now 10,599,077.
Application 16/378,180 is a continuation of application No. 15/632,870, filed on Jun. 26, 2017, granted, now 10,268,144, issued on Apr. 23, 2019.
Claims priority of application No. 2016-131665 (JP), filed on Jul. 1, 2016.
Prior Publication US 2020/0183308 A1, Jun. 11, 2020
Int. Cl. G03G 15/20 (2006.01); G03G 13/20 (2006.01); G03G 21/20 (2006.01)
CPC G03G 15/2046 (2013.01) [G03G 13/20 (2013.01); G03G 15/2017 (2013.01); G03G 15/2028 (2013.01); G03G 15/2042 (2013.01); G03G 15/2053 (2013.01); G03G 21/206 (2013.01); G03G 2215/2035 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An image heating apparatus that heats an image formed on a recording material, the image heating apparatus comprising:
a heater having a plurality of heat generating elements arranged in a direction orthogonal to a conveying direction of the recording material; and
a control portion that controls electrical power to be supplied to the plurality of heat generating elements, the control portion being capable of individually controlling the plurality of heat generating elements,
wherein the control portion respectively sets a heating amount with respect to a region in which an image is formed and a heating amount with respect to a region in which an image is not formed in a single sheet of the recording material, and
wherein the control portion at least sets the heating amount with respect to the region in which the image is not formed when the recording material is heavy paper to become smaller than the heating amount with respect to the region in which the image is not formed when the recording material is plain paper and the heating amount with respect to the region in which the image is formed when the recording material is plain paper to become smaller than the heating amount with respect to the region in which the image is formed when the recording material is heavy paper so that a difference between the heating amount with respect to the region in which the image is formed and the heating amount with respect to the region in which the image is not formed when the recording material is heavy paper becomes larger than a difference between the heating amount with respect to the region in which the image is formed and the heating amount with respect to the region in which the image is not formed when the recording material is plain paper.