Image heating apparatus
AssigneeCanon Kabushiki Kaisha
InventorKen Oi
Life of this patent
Estimating the term…
Abstract
An image heating apparatus includes a rotary member, a heating member configured to heat the rotary member, the heating member being held in contact with the rotary member, a temperature detecting element configured to detect the temperature of the rotary member or the heating member, a protection element configured to interrupt power supply to the heating member, the protection element being activated when sensing an abnormal rise in the temperature of the heating member, and a control portion configured to control the image heating apparatus. When the temperature detected by the temperature detecting element exceeds a threshold value, the control portion stops rotation of the rotary member.
Claims14
An image heating apparatus, comprising:
- a rotary member;
- a heating member configured to heat the rotary member, the heating member being held in contact with the rotary member;
- a temperature detecting element configured to detect the temperature of the rotary member or the heating member;
- a protection element configured to interrupt power supply to the heating member, the protection element being activated when sensing an abnormal rise in temperature of the heating member;
- and
- a control portion configured to control the image heating apparatus,
- wherein, when the temperature detected by the temperature detecting element exceeds a threshold value, the control portion stops rotation of the rotary member to shorten a time required to activate the protection element.
An image heating apparatus, comprising:
- a rotary member;
- a heating member configured to heat the rotary member, the heating member being held in contact with the rotary member;
- a temperature detecting element configured to detect the temperature of the rotary member or the heating member;
- a protection element configured to interrupt power supply to the heating member, the protection element being activated when sensing an abnormal rise in temperature of the heating member;
- and
- a control portion configured to control the image heating apparatus,
- wherein, when the temperature detected by the temperature detecting element exceeds a first threshold value, the control portion outputs a signal for turning off the power supply to the heating member, and
- thereafter, when the temperature detected by the temperature detecting element exceeds a second threshold value higher than the first threshold value, the control portion stops rotation of the rotary member.
Dependencies are inferred from the claim text.