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Heater, fixing device, and image forming device

A technology for heaters and heating elements, which is applied to the electrical recording process using charge graphics, equipment and instruments for the electrical recording process using charge graphics, and can solve the problems of increased degradation of the annular belt and damage to heating components, etc.

Active Publication Date: 2021-05-11
TOSHIBA TEC KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the load applied by the pressure roller to the heat-generating component is increased, there is a risk of damage to the heat-generating component and an increase in the degree of deterioration of the endless belt.

Method used

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  • Heater, fixing device, and image forming device
  • Heater, fixing device, and image forming device
  • Heater, fixing device, and image forming device

Examples

Experimental program
Comparison scheme
Effect test

no. 2 approach

[0040] In the second embodiment, an example in which the configuration of the fixing device is changed from that of the first embodiment will be described. Image 6 It is a diagram showing a configuration example of the fixing device 30A.

[0041] The film guide 36 has a semi-cylindrical shape, and accommodates the heater 32 in a concave portion 361 on the outer peripheral surface.

[0042] The fixing film 34A (belt) is an endless (endless) rotating belt. The fixing film 34A is fitted on the outer peripheral surface of the film guide 36 . The fixing film 34A is sandwiched between the film guide 36 and the pressure roller 31 , and driven by the rotation of the pressure roller 31 .

[0043] The aforementioned heater 32 is in contact with the fixing film 34A, and heats the fixing film 34A.

[0044] The sheet 105 on which the toner image is formed is conveyed between the fixing film 34A and the pressure roller 31 . The fixing film 34A heats the sheet to fix the toner image on ...

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PUM

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Abstract

The present invention relates to a heater, a fixing device, and an image forming device. The heater has a heating body and a protective layer. The protective layer covers the heating element, and at least a part of the surface has a convex portion protruding toward the heating element. Such a heater can be applied to a fixing device.

Description

technical field [0001] Embodiments described in this specification relate to a technique for fixing a toner image formed on a sheet to the sheet. Background technique [0002] Conventionally, there is known a fixing device in which a sheet is conveyed by an endless belt and a pressure roller, and the sheet is heated by a plate heater inside the endless belt. A nip region of the sheet (endless belt) is formed by a heater and a pressure roller. The length of the nip area in the sheet conveyance direction was recorded as the gap width. The fixing device fixes the toner image on the sheet to the sheet by heating while pinching the sheet conveyed to the width of the gap. [0003] When the gap width is increased, the heater can be sufficiently pressed against the sheet through the endless belt, and the sheet can be heated favorably. In order to increase the gap width, it is conceivable to increase the load of the pressure roller on the heat-generating component or to increase t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/20
CPCG03G15/206G03G15/2064G03G15/2053G03G15/2057
Inventor 菊地和彦高木修宫内智绘
Owner TOSHIBA TEC KK