Image heating apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMasahiro Suzuki, Tomonori Shida
Life of this patent
Estimating the term…
Abstract
An image forming apparatus is provided with a hearing device, a conveying device, and a control device, wherein the control device has a mode for changing the set temperature from a first temperature to a second temperature higher than the first temperature when the leading edge of the recording material passes through the nip portion by a predetermined distance and the predetermined distance is equal to a value 0.3 to 2.0 times larger than the distance between the nip portion and the carrying means. Thereby, a recording-material jam is controlled and the image quality is prevented from deteriorating.
Claims19
An image heating apparatus for heating an image formed on a recording material, comprising:
- heating means for including a nip portion for holding and conveying the recording material;
- conveying means provided just after the nip portion in the recording-material moving direction;
- and
- control means for controlling an electric power supply to the heating means so that a temperature of the heating means is maintained at a set temperature,
- wherein the control means has a mode for changing the set temperature from a first temperature to a second temperature higher than the first temperature when the leading edge of the recording material passes through the nip portion by a predetermined distance and the predetermined distance is equal to a value 0.3 to 2.0 times larger than the distance between the nip portion and the conveying means.
An image heating apparatus for heating an image formed on a recording material, comprising:
- heating means including a nip portion for holding and conveying the recording material;
- and
- conveying means provided just after the heating means in the recording-material moving direction, wherein the apparatus has a mode for heating the range from the leading edge of the recording material up to a predetermined distance at a temperature lower than the subsequent temperature by the heating means and the predetermined distance is equal to a value 0.9 to 2.6 times larger than the distance between the nip portion and the conveying means.
An image heating apparatus for heating an image formed on a recording material, comprising:
- heating means having a nip portion for holding and conveying the recording material;
- conveying means provided just after the heating means in the recording-material moving direction;
- control means for controlling an electric power supply to the heating means so that a temperature of the heating means is maintained at a set temperature,
- wherein the control means has a mode for changing the set temperature from a first temperature to a second temperature higher than the first temperature after the leading edge of the recording material passes through the nip portion and sets the mode in accordance with a type of the recording material.
An image heating apparatus for heating an image formed on a recording material, comprising:
- heating means having a nip portion for holding and conveying the recording material, the heating means including a heating member and a backup member for forming the nip portion together with the heating member;
- conveying means provided just after the nip portion in the recording-material moving direction;
- control means for controlling an electric power supply to the heating means so that a temperature of the heating means is maintained at a set temperature,
- wherein the control means has a mode for changing the set temperature from a first temperature to a second temperature higher than the first temperature after the leading edge of the recording material passes through the nip portion and sets the first temperature in accordance with a temperature state of the backup member.
Dependencies are inferred from the claim text.