Patent ID: 11947290
Assignee: CANON KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. An image forming apparatus comprising:
an image forming unit configured to carry out an image formation on a recording material;
a first rotatable member;
a second rotatable member contacting an outer peripheral surface of the first rotatable member and configured to form a nip portion between itself and the first rotatable member;
a heater disposed in an inside apace of the second rotatable member;
a first temperature detecting unit provided on the heater at a central position with respect to a longitudinal direction of the heater;
a second temperature detecting unit provided closer to an end side position than the first temperature detecting unit with respect to the longitudinal direction of the heater; and
a control unit configured to control a feeding interval in which a trailing edge of a preceding recording material passes through the nip portion until a leading edge of a subsequent recording material reaches the nip portion,
wherein the control unit controls the feeding interval to be a first interval in a case in which a basis weight of a preceding recording material and a subsequent recording material is equal to or smaller than a predetermined value and a temperature detected by the second temperature detecting unit is a first temperature,
wherein the control unit controls the feeding interval to be a second interval shorter than the first interval in a case in which the basis weight of a preceding recording material and a subsequent recording material is larger 1 than the predetermined value and the temperature detected by the second temperature detecting unit is the first temperature, and
wherein the control unit controls the feeding interval to be a third interval longer than the first interval in a case in which the temperature detected by the second temperature detecting unit is equal to or higher a predetermined temperature higher than the first temperature.