US 12,248,263 B2
Image forming apparatus,adjustment method and non-transitory computer-readable recording medium encoded with adjustment program
Takashi Harashima, Toyokawa (JP)
Assigned to KONICA MINOLTA, INC., Tokyo (JP)
Filed by Konica Minolta, Inc., Tokyo (JP)
Filed on May 1, 2023, as Appl. No. 18/309,996.
Claims priority of application No. 2022-077786 (JP), filed on May 10, 2022.
Prior Publication US 2023/0367247 A1, Nov. 16, 2023
Int. Cl. G03G 15/20 (2006.01); G03G 15/00 (2006.01)
CPC G03G 15/2064 (2013.01) [G03G 15/2039 (2013.01); G03G 15/50 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
a pressure roller;
a driver that drives rotation of the pressure roller;
an endless fixing belt;
a pressing member that is provided inside the fixing belt and opposite to the pressure roller and forms a nip portion in which the fixing belt and the pressure roller come into contact with each other;
a pressing force adjustment mechanism that adjusts a pressing force for pressing one of the pressure roller and the pressing member toward another one of the pressure roller and the pressing member; and
a drive controller that controls the pressing force adjustment mechanism and the driver to rotate the pressure roller with the pressing force being smaller than a normal value defined for a normal state,
wherein the drive controller, during rotation of the pressure roller with the pressing force being smaller than the normal value, rotates the pressure roller at a speed higher than a rotation speed of the pressure roller in a state in which a recording medium is passing through the nip portion.