US 12,411,443 B2
Image heating device and heater for use in image heating device
Yasuhiro Shimura, Yokohama (JP); Akira Kato, Mishima (JP); and Atsushi Iwasaki, Susono (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 8, 2024, as Appl. No. 18/600,067.
Application 18/600,067 is a continuation of application No. 18/299,888, filed on Apr. 13, 2023, granted, now 11,953,851.
Application 18/299,888 is a continuation of application No. 17/710,274, filed on Mar. 31, 2022, granted, now 11,644,774, issued on May 9, 2023.
Application 17/710,274 is a continuation of application No. 17/204,800, filed on Mar. 17, 2021, granted, now 11,314,188, issued on Apr. 26, 2022.
Application 17/204,800 is a continuation of application No. 16/805,490, filed on Feb. 28, 2020, granted, now 10,983,463, issued on Apr. 20, 2021.
Application 16/805,490 is a continuation of application No. 16/540,600, filed on Aug. 14, 2019, granted, now 10,671,001, issued on Jun. 2, 2020.
Application 16/540,600 is a continuation of application No. 15/758,204, granted, now 10,429,781, issued on Oct. 1, 2019, previously published as PCT/JP2016/003724, filed on Aug. 12, 2016.
Claims priority of application No. 2015-179567 (JP), filed on Sep. 11, 2015.
Prior Publication US 2024/0210865 A1, Jun. 27, 2024
Int. Cl. G03G 15/20 (2006.01); H05B 3/00 (2006.01)
CPC G03G 15/2053 (2013.01) [G03G 15/2039 (2013.01); G03G 15/2042 (2013.01); H05B 3/0095 (2013.01); G03G 2215/2035 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A heater for use in an image heating device, the heater comprising:
a substrate;
a first heating block provided on the substrate and configured to generate heat by electric power supplied thereto, the first heating block being controlled by a first switching element;
a second heating block provided on the substrate at a position different from the position of the first heating block in a longitudinal direction of the substrate and configured to generate heat by electric power supplied thereto, the second heating block being controlled by a second switching element;
a third heating block provided on the substrate at a position different from the positions of the first and second heating blocks in the longitudinal direction of the substrate and configured to generate heat by electric power supplied thereto, the third heating block being controlled by the first switching element;
a fourth heating block provided on the substrate at a position different from the positions of the first, second and third heating blocks in the longitudinal direction of the substrate and configured to generate heat by electric power supplied thereto, the fourth heating block being controlled by the second switching element;
a first temperature sensor provided at a position corresponding to the first heating block;
a second temperature sensor provided at a position corresponding to the second heating block;
a third temperature sensor provided at a position corresponding to the third heating block; and
a fourth temperature sensor provided at a position corresponding to the fourth heating block,
wherein the first temperature sensor and the second temperature sensor are electrically connected to a first common conductor, and the third temperature sensor and the fourth temperature sensor are electrically connected to a second common conductor which is not electrically connected to the first common conductor.