Image forming apparatus with heat control of image bearing member
AssigneeCanon Kabushiki Kaisha
InventorDaigo Matsuura
Life of this patent
Estimating the term…
Abstract
An image forming apparatus has an image bearing member on which an electrostatic latent image is formed and toner deposited to form a toner image, a heater disposed at a position out of contact with the surface of the image bearing member to output radiant heat to the image bearing member, and a heat controller for controlling rotation of the image bearing member and heat output by the heater to heat the outer peripheral surface of the image bearing member moving relative to the heater. The heater includes a lamp heater having a radiation spectrum that exhibits a major part of the peak intensity in the range of infrared wavelength from 2 to 3.5 μm.
Claims10
An image forming apparatus comprising:
- an image bearing member on which an electrostatic latent image formed on a surface of the image bearing member has deposited toner for forming a toner image;
- heating means disposed at a position out of contact with the surface of the image bearing member, said heating means for outputting radiant heat to said image bearing member;
- and
- heat control means for controlling rotation of said image bearing member and the outputting of radiation heat by said heating means so as to heat an outer peripheral surface of said image bearing member moving relative to said heating means;
- wherein said heating means comprises a lamp heater having a radiation spectrum that exhibits a major part of the peak intensity in the range of infrared wavelength from 2 to 3.5 μm.
An image forming apparatus comprising:
- an image bearing member on which an electrostatic latent image formed on a surface of the image bearing member has deposited toner for forming a toner image;
- heating means disposed at a position out of contact with the surface of the image bearing member, said heating means for outputting radiant heat to said image bearing member;
- and
- heat control means for controlling rotation of said image bearing member and output of radiant heat by said heating means so as to heat an outer peripheral surface of said image bearing member moving relative to said heating means;
- wherein said heating means comprises a lamp heater including a heating element enclosed in a glass tube, the heating element when powered on outputs radiant heat through a wall of the glass tube, and the lamp heater has a distribution of anisotropic radiation intensity and outputs radiant heat in a specific direction through a 360-degree periphery of the cross section of the lamp heater so that an amount of radiant heat directed to the image bearing member is higher than an amount of radiant heat directed to the circumferential direction of the image bearing member.
An image forming apparatus comprising:
- an image bearing member on which an electrostatic latent image formed on a surface of the image bearing member has deposited toner for forming a toner image;
- heating means disposed at a position out of contact with the surface of the image bearing member, said heating means for outputting radiant heat to said image bearing member;
- and
- heat control means for controlling rotation of said image bearing member and the outputting of radiant heat by said heating means so as to heat an outer peripheral surface of said image bearing member moving relative to said heating means;
- wherein the heating means comprises a lamp heater including a carbon heating element enclosed in a glass tube and the carbon heating element when powered on emits radiant heat through a wall of the glass tube.
Dependencies are inferred from the claim text.