US 11,747,758 B2
Fixing device
Tokifumi Tanaka, Komaki (JP); Hideki Kanada, Toyohashi (JP); and Mingguang Zhang, Nagoya (JP)
Assigned to BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed on Dec. 2, 2022, as Appl. No. 18/61,361.
Application 18/061,361 is a continuation of application No. 17/539,371, filed on Dec. 1, 2021, granted, now 11,537,074.
Claims priority of application No. 2020-202246 (JP), filed on Dec. 4, 2020; and application No. 2020-202247 (JP), filed on Dec. 4, 2020.
Prior Publication US 2023/0097934 A1, Mar. 30, 2023
Int. Cl. G03G 15/20 (2006.01)
CPC G03G 15/2057 (2013.01) [G03G 15/206 (2013.01); G03G 15/2025 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A fixing device, comprising:
a rotating body;
an endless belt contacting an outer circumferential surface of the rotating body, a base material of the endless belt being made of a heat-resistant resin having a glass transition temperature of 140° C. or more;
a heater configured to heat at least one of the rotating body and the endless belt;
a sliding sheet contacting an inner circumferential surface of the endless belt, a base material of the sliding sheet being made of a heat-resistant resin having a glass transition temperature of 140° C. or more; and
a pressure pad, the endless belt and the sliding sheet being interposed between the pressure pad and the rotating body;
wherein a microhardness of the endless belt by nanoindentation technique is higher than a microhardness of the sliding sheet.