US 12,449,748 B2
Image forming apparatus
Naoki Sueishi, Osaka (JP)
Assigned to KYOCERA Document Solutions Inc., Osaka (JP)
Filed by KYOCERA Document Solutions Inc., Osaka (JP)
Filed on Oct. 28, 2024, as Appl. No. 18/928,554.
Claims priority of application No. 2023-186071 (JP), filed on Oct. 31, 2023.
Prior Publication US 2025/0138456 A1, May 1, 2025
Int. Cl. G03G 15/20 (2006.01); G03G 15/00 (2006.01)
CPC G03G 15/2039 (2013.01) [G03G 15/2057 (2013.01); G03G 15/2064 (2013.01); G03G 15/80 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
a transfer device configured to transfer a toner image onto a sheet;
a fixing device configured to apply heat and pressure to the toner image on the sheet; and
a control device configured to control the fixing device; wherein
the fixing device comprises:
a heater;
a holding member including a metal portion and configured to hold the heater;
a flexible cylindrical fixing member having an inner peripheral surface in contact with the heater;
a pressure roller that is rotatably supported and configured to apply pressure to the toner image on the sheet by sandwiching the fixing member and the sheet between the pressure roller and the heater;
a drive mechanism configured to rotate the pressure roller; and
a resistance measuring circuit configured to measure electrical resistance of the metal portion of the holding member; and
the control device controls whether to allow or prohibit a supply of power to the heater in accordance with a rotation state of the pressure roller and a measured resistance value of the resistance measuring circuit.