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

Claim 7:
8. 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 first lever where the first lever is configured to make contact with the outer surface of the web and to swing based on an outer diameter of the web wound by the winding roller, and
wherein the contact member further includes a gear mechanism arranged to rotate a rotation portion of the variable resistor, the rotation portion is arranged so as to rotate when the first lever is swung, and a rotation angle of the rotation portion corresponds to a rotation angle of the variable resistor.