Patent ID: 11934125
Assignee: CANON KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An image forming apparatus comprising:
a heating rotary member configured to heat toner born on a recording material;
a pressure rotary member configured to pressurize the heating rotary member, wherein the heating rotary member and the pressure rotary member form a fixing nip portion and fix a toner image to the recording material at the fixing nip portion while nipping and conveying the recording material with the toner born on the recording material;
a web configured to collect toner adhering to a surface of the heating rotary member without being fixed to the recording material;
a winding roller configured to wind the web;
a motor configured to rotate the winding roller to wind the web;
a contact member configured to make contact with an outer surface of the web wound by the winding roller and to move based on a position of the outer surface;
a variable resistor configured to be connected so as to change a resistance value of the variable resistor depending on a position of the contact member; and
a control unit configured to control a rotation amount of the motor based on the resistance value,
wherein the contact member includes a lever where the lever is configured to make contact with the outer surface of the web and to swing based on an outer diameter of the winding roller.