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Fixing device and image forming apparatus

A technology for image and fixing parts, which is applied in the fields of electrical recording technology using charge graphics, equipment for using electrical recording technology using charge graphics, and electrical recording technology. It can solve the problems of low heat capacity and changes in fixing parts, and achieve shortening time The effect of improving uniformity and less likely to accumulate stress

Inactive Publication Date: 2014-06-25
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the heat capacity of the fixing member formed of the belt member is low, the heat generated in the fixing member tends to vary in its longitudinal direction.

Method used

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  • Fixing device and image forming apparatus
  • Fixing device and image forming apparatus
  • Fixing device and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0044]

[0045] figure 1 is a schematic diagram showing a configuration example of an image forming apparatus to which the fixing device of the exemplary embodiment is applied. figure 1 The illustrated image forming apparatus 1 is a so-called tandem color printer, and includes: an image forming unit 10 that performs image forming operations based on image data; and a controller 31 that controls operations of the entire image forming apparatus 1 . The image forming apparatus 1 further includes: a communication unit 32 that communicates with, for example, a personal computer (PC) 3, an image reading device (scanner) 4, etc. to receive image data; image data for image processing.

[0046] The image forming assembly 10 includes four image forming units 11Y, 11M, 11C, and 11K (also collectively referred to as “image forming units 11 ”) as an exa...

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PUM

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Abstract

The fixing device includes: a fixing member including a conductive layer and fixing toner on a recording medium by electromagnetic induction; a magnetic-field generating member generating an alternate-current magnetic field intersecting with the conductive layer; a magnetic-path forming member that includes a circular arc facing the magnetic-field generating member, that forms a magnetic path of the alternate-current magnetic field, within a range up to a permeability change start temperature, and that allows the alternate-current magnetic field to go through the magnetic-path forming member within a range exceeding the permeability change start temperature; and a support member supporting the magnetic-path forming member. The circular arc shaped portion has an upstream edge in a moving direction of the fixing member and a position of the upstream edge is concaved toward a center of the magnetic path forming member from each of ends of the magnetic path forming member in a longitudinal direction.

Description

technical field [0001] The present invention relates to a fixing device and an image forming device. Background technique [0002] As fixing devices respectively installed in image forming devices using an electrophotographic method such as copiers and printers, fixing devices using an electromagnetic induction heating method are known. [0003] For example, Japanese Patent Application Laid-Open Publication No. 2003-186322 describes an electromagnetic induction heating fixing device in which an electromagnetic induction coil as a magnetic flux generating unit is provided in a fixing roller made of magnetic metal The fabricated core metal cylinder is formed, and the fixing roller is directly self-heated by using the induction magnetic field generated by the electromagnetic induction coil to induce eddy current in the fixing roller. [0004] Here, the amount of time required for self-heating the fixing member to the fixing set temperature (warm-up time) is generally shortened...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/20G03G15/01
CPCG03G2215/2041G03G15/2064
Inventor 岩井清
Owner FUJIFILM BUSINESS INNOVATION CORP