US 12,393,143 B2
Heater and image heating device mounted with heater
Yasuhiro Shimura, Yokohama (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Sep. 5, 2023, as Appl. No. 18/461,016.
Application 18/461,016 is a continuation of application No. 17/872,486, filed on Jul. 25, 2022, granted, now 11,782,366.
Application 17/872,486 is a continuation of application No. 17/366,811, filed on Jul. 2, 2021, granted, now 11,422,491, issued on Aug. 23, 2022.
Application 17/366,811 is a continuation of application No. 16/581,079, filed on Sep. 24, 2019, granted, now 11,079,705, issued on Aug. 3, 2021.
Application 16/581,079 is a continuation of application No. 14/944,076, filed on Nov. 17, 2015, granted, now 10,459,379, issued on Oct. 29, 2019.
Application 14/944,076 is a continuation of application No. 14/029,619, filed on Sep. 17, 2013, granted, now 9,235,166, issued on Jan. 12, 2016.
Claims priority of application No. 2012-205713 (JP), filed on Sep. 19, 2012.
Prior Publication US 2023/0408957 A1, Dec. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G03G 15/20 (2006.01); H05B 3/03 (2006.01); H05B 3/26 (2006.01)
CPC G03G 15/2039 (2013.01) [G03G 15/2003 (2013.01); G03G 15/2042 (2013.01); G03G 15/2053 (2013.01); H05B 3/03 (2013.01); G03G 2215/2035 (2013.01); H05B 3/26 (2013.01); H05B 2203/007 (2013.01); H05B 2203/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An image heating device comprising:
a cylindrical film;
a heater arranged in an inner space of the film; and
a roller configured to come into contact with an outer periphery of the film and form a nip portion to nip and convey a recording material together with the heater via the film,
wherein the recording material on which an image is formed is nipped and conveyed by the nip portion and heated,
wherein the heater includes:
an elongated substrate,
a first heating block arranged in a central area of the substrate in a longitudinal direction of the substrate,
a second heating block arranged closer to an end portion than the first heating block in the longitudinal direction of the substrate, wherein each of the first heating block and the second heating block includes a plurality of heat generating resistors electrically arranged side by side in the longitudinal direction of the substrate,
a first electrode, arranged on the substrate, electrically connected to the plurality of heat generating resistors included in the first heating block,
a second electrode, arranged on the substrate, electrically connected to the plurality of heat generating resistors included in the second heating block, and
a third electrode, arranged on the substrate, electrically connected to the plurality of heat generating resistor included in the first heating block and the plurality of heat generating resistors included in the second heating block, wherein the first electrode, the second electrode, and the third electrode are configured to receive power supply from a power source by coming into contact with power supply terminals different from each other, and
wherein the image heating device comprises:
a first temperature detecting element configured to detect a temperature and arranged in an area corresponding to the first heating block, and
a second temperature detecting element configured to detect a temperature and arranged in an area corresponding to the second heating block.