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Fixing device

A fixing roller and cylinder technology, which is applied in the field of fixing devices, can solve the problems of increased power consumption, temperature rise of the fixing belt, thermal offset of color materials, etc., and achieves the effects of reducing energy consumption, small fixing power, and short printing time

Inactive Publication Date: 2007-04-04
FUJIFILM BUSINESS INNOVATION CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the cover rubber layer 4a of the fixing roller 1 is thick, the thermal conductivity of the heat transfer from the fixing roller 1 to the form deteriorates, and the time for the surface temperature of the fixing roller 1 to rise becomes longer. The heating of the device 3, the followability of the surface temperature of the fixing roller 1 is reduced, the thermal offset of the color material occurs, or the first printing takes a long time
However, these methods have problems in that power consumption is increased and the size of the fixing device is increased.
However, even with these methods, it takes a considerable amount of time to raise the temperature of the fixing belt to the temperature required for fixing.

Method used

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Embodiment Construction

[0061] The invention will be described below with reference to the embodiments shown in the drawings.

[0062] FIG. 1 is a cross-sectional view showing a fixing device 10 according to a first embodiment of the present invention. The fixing device 10 is arranged inside an electrophotographic device (copier, facsimile, printer, etc.). An electrophotographic device (copier, facsimile machine, printer, etc.) includes an image forming device (not shown) for forming (or reproducing) an image on a form. The form on which the image is formed (or reproduced) is conveyed from the image forming device to the fixing device 10 as indicated by arrow A, for example.

[0063] The fixing device 10 includes a fixing roller 12 , a pressure roller 14 arranged to be in contact with the fixing roller 12 , a third roller 16 arranged parallel to the fixing roller 12 , and a fixing belt 18 wound around the fixing roller 12 and the third roller 16 . . The third roller 16 includes a cylindrical tube ...

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Abstract

A fixing apparatus comprises a fixing roller, a pressing roller, a third roller disposed in parallel with the fixing roller, and a fixing belt wound around the fixing roller and the third roller. The fixing roller is pressed against the pressing roller via a fixing belt. The third roller or the fixing belt includes a heat generating resistive sheet. The heat generating resistive sheet rapidly heats the fixing belt. The fixing belt efficiently transfers heat to paper. The fixing roller does not need to transfer heat from the inside to the outside. Therefore, an elastic material layer is provided on the surface of the fixing roller.

Description

technical field [0001] The present invention relates to a fixing device for use with a monochrome or color electrophotographic device. Background technique [0002] An electrophotographic device (copier, facsimile machine, printer, etc.) includes an image forming device, and a fixing device for fixing (copied) images formed on form paper by the image forming device. The fixing device is composed of a fixing roller and a pressure roller, and conveys the form between the fixing roller and the pressure roller. One or both of the fixing roller and the pressure roller are heat rollers with a built-in heat source, and the image formed on the format paper is fixed with heat and pressure. [0003] For example, FIGS. 6 and 7 in the accompanying drawings are diagrams showing examples of conventional fixing devices. FIG. 6 shows a fixing device having a fixing roller 1 and a pressure roller 2 . A halogen lamp 3 is installed on the fixing roller 1 as a heat source. The fixing roller...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/20
CPCG03G2215/2016G03G2215/2032G03G15/2064G03G15/2057
Inventor 河村孝夫汤川俊浩木村正利小西正雄
Owner FUJIFILM BUSINESS INNOVATION CORP
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