US 12,066,777 B2
Fixing device
Ryota Saeki, Sunto Shizuoka (JP)
Assigned to Toshiba Tec Kabushiki Kaisha, Tokyo (JP)
Filed by TOSHIBA TEC KABUSHIKI KAISHA, Tokyo (JP)
Filed on Dec. 13, 2022, as Appl. No. 18/080,475.
Claims priority of application No. 2022-076611 (JP), filed on May 6, 2022.
Prior Publication US 2023/0359140 A1, Nov. 9, 2023
Int. Cl. G03G 15/20 (2006.01)
CPC G03G 15/2039 (2013.01) [G03G 15/2053 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A fixing device, comprising:
a fixing belt configured to rotate about an axial direction;
a heater within an interior region surrounded by the fixing belt, the heater configured to heat the fixing belt and including:
a substrate with a length direction corresponding to the axial direction, the substrate having different widths in a width direction perpendicular to the length direction such that a first portion has a width in the width direction that is greater than a width of a second portion in the width direction,
a first heating element on a central portion of a frontside of the substrate to overlap with the second portion, and
a second heating element on an end portion of the frontside of the substrate to overlap with the first portion;
a first temperature sensing element on a backside of the substrate at a position along the axial direction that overlaps with the first heating element but not the second portion; and
a second temperature sensing element at a position on the backside of the substrate along the axial direction that overlaps with the second heating element and not the first heating element.