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

Claim 7:
8. An image forming apparatus comprising:
an image forming unit configured to carry out an image formation on a recording material;
a feeding portion on which the recording material is stacked;
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 space 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 at a position closer to an end side of the heater 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 so that a number of printable sheets per unit time becomes a first number in a case in which a feeding speed of a preceding recording material and a subsequent recording material is a first feeding speed 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 so that the number of printable sheets per unit time becomes a second number smaller than the first number in a case in which the feeding speed of a preceding recording material and a subsequent recording material is a second feeding speed lower than the first feeding speed and the temperature detected by the second temperature detecting unit is the first temperature,
wherein the control unit causes the feeding portion to feed the recording material after the feeding interval has elapsed from a timing when a preceding recording material is fed, and
wherein in a case in which the image forming unit dose not start the image formation on a recording material to be fed next, the control unit causes the feeding portion to feed the recording material to be fed next after the feeding interval has elapsed from the timing when a preceding recording material is fed, and in a case in which the image forming unit starts the image formation on the recording material to be fed next, the control unit causes the feeding portion to feed the recording material after the feeding interval has elapsed from the timing when the recording material to be fed is fed.