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Image heating apparatus

A heating device and image technology, which can be applied to electric recording process applying charge pattern, equipment for electric recording process applying charge pattern, electric recording technique, etc., can solve the problems of blurring of copying and the like

Inactive Publication Date: 2003-09-17
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] And in the case of forming a linear image on a wet recording material, this image is scattered by the vapor generated in image fixing and deposited on the recording material, thereby blurring the obtained copy

Method used

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Embodiment Construction

[0024] The present invention will be described in detail below by the embodiments of the present invention with reference to the accompanying drawings.

[0025] An embodiment of the present invention will first be described with reference to FIGS. 1A , 1B, 2 , 3 and 4 .

[0026] 1A and 1B are schematic diagrams showing main parts of a heat generating member and a power supply control device employed in a film heating image fixing apparatus embodying the present invention.

[0027] As shown in FIGS. 1A and 1B, a heater 700 constituting a heat generating part is equipped with a heat substrate 701, for example, made of alumina and having a substantially rectangular cross section, and the substrate 701 is arranged so that its longitudinal direction is perpendicular to the direction of the recording material. The conveying direction, and two heating resistance members 710, 720 made of, for example, silver alloy are arranged longitudinally thereon. The power supply control device i...

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PUM

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Abstract

The present invention provides an image heating device comprising a heater, a sliding film and a supporting member. The heater includes a first heat generating part that generates heat by supplying electricity to it, and a second heat generating part that generates heat by supplying electricity to it, and the second heat generating part is located at the side of the first heat generating part relative to the moving direction of the recording material. The downstream end, and the first and second heat generating members are controlled so that the ratio of the heat generation thereof is changed according to the presence or absence of the recording material in the nip.

Description

technical field [0001] BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an image heating apparatus for use in an image forming apparatus such as a copying machine or a printer, and more particularly to an apparatus for heating an image by transferring heat from a heater through a film. Background technique [0002] In the electrophotographic imaging process, the toning developed on the recording material is generally achieved by the heat and pressure in the heating roller system while the recording material is squeezed and conveyed between a heated roller and a pressure roller. Fixing of an agent image, wherein a heat roller is controlled at a predetermined temperature, and a pressure roller has an elastic layer and is kept in pressure contact with the heat roller. [0003] Recently, in order to save power in the standby state and in order to reduce the time from power-on to image output, a fixing device using a film heating fixing method h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/20
CPCG03G15/2064G03G2215/2016G03G2215/2035G03G15/2046G03G15/2039
Inventor 山崎道仁
Owner CANON KK