US 12,449,749 B2
Fixing device
Hiroki Kawai, Chiba (JP); Yasuharu Toratani, Chiba (JP); Hiroshi Miyamoto, Saitama (JP); Akiyoshi Shinagawa, Saitama (JP); Ayano Ogata, Ibaraki (JP); Daigo Matsuura, Tokyo (JP); Misa Kawashima, Chiba (JP); Masanobu Tanaka, Chiba (JP); and Asuna Fukamachi, Chiba (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 8, 2024, as Appl. No. 18/599,949.
Application 18/599,949 is a continuation of application No. 18/166,651, filed on Feb. 9, 2023, granted, now 11,982,961.
Claims priority of application No. 2022-028930 (JP), filed on Feb. 28, 2022.
Prior Publication US 2024/0210864 A1, Jun. 27, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G03G 15/20 (2006.01)
CPC G03G 15/2053 (2013.01) [G03G 15/2025 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A fixing device comprising:
an endless belt configured to apply heat to a recording material;
a rotatable pressing member contacting an outer circumferential surface of the belt; and
a pad member inside of the belt, configured to form a nip portion by nipping and feeding the belt between itself and the rotatable pressing member, and on which a plurality of projections projecting toward the rotatable pressing member are formed on a side sliding with the belt,
wherein the rotatable pressing member nips and feeds the recording material in the nip portion in cooperation with the belt and fixes a toner image on the recording material by applying heat and pressure,
wherein the pad member includes a sliding layer provided on an outer surface of the plurality of projections, and
wherein a shape of a surface of the sliding layer is a curved surface and a radius of curvature R of the curved surface satisfies 300 μm≤R≤850 μm.