Transfer apparatus, image forming apparatus, and image forming method

An image and transfer member technology, applied in the field of transfer devices, can solve the problems of stress concentration skew and shortened life, and achieve the effects of preventing accumulated skew, reducing offset, and reducing skew

Inactive Publication Date: 2010-12-01
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of using such an elastic member, there is a problem that distortion due to stress concentration is likely to occur.
In addition, as a result, the inconvenience that life shortens occurs

Method used

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  • Transfer apparatus, image forming apparatus, and image forming method
  • Transfer apparatus, image forming apparatus, and image forming method
  • Transfer apparatus, image forming apparatus, and image forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] The rubber sheet 61c of Example 1 has the following structure.

[0106] Structure: single layer

[0107] Volume resistivity: 1×10 10 (Ω·cm)

[0108] Material: polyurethane rubber,

[0109] Film thickness: 0.5mm

[0110] Conductive Materials: Ionically Conductive Materials

[0111] Sheet surface hardness: JISA90°

[0112] In addition, the intermediate transfer belt 40 of Example 1 has the following structure.

[0113] Structure: single layer belt

[0114] Material: Polyimide resin

[0115] Film thickness: 100μm

[0116] Conductive material: Electron conductive material (carbon)

[0117] As a result of using such a rubber sheet 61c and the intermediate transfer belt 40 in the image forming apparatus of the first embodiment having a single-pinch structure, the secondary transfer property to coated paper can be improved.

Embodiment 2

[0119] The rubber sheet 61c of Example 2 has a two-layer structure and has the following structure.

[0120] Structure: 2 layers (Young's modulus 2GPa)

[0121] Volume resistivity: 1×10 7 (Ω·cm)

[0122] ·Substrate layer

[0123] Material: Polyimide

[0124] Film thickness: 90μm

[0125] Conductive material: Electron conductive material (carbon)

[0126] · Elastic layer

[0127] Material: polyurethane rubber

[0128] Film thickness: 3.0mm

[0129] Conductive material: Electron conductive material (carbon)

[0130] Sheet surface hardness: JISA35°

[0131] In addition, the Young's modulus of the rubber sheet 61c should just be 2-5 GPa. In addition, the conductive material of the rubber sheet 61c may be a mixed conductive material containing an ion conductive material or an electronic conductive material (carbon) and an ion conductive material. Furthermore, the rubber hardness may be 30° to 70°.

[0132] In addition, the intermediate transfer belt 40 of Example 2 has ...

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PUM

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Abstract

The invention provides a transfer apparatus excellently performing transfer by reducing distortion of an elastic layer of a transfer roller and transfer defect involved with the distortion and to provide an image forming apparatus excellently forming an image and an image forming method. The transfer apparatus includes: image carriers 10Y, 10M, 10C and 10K carrying the image; a transfer member 61 including a base material 61b having a recessed portion 63 having an opening width longer than the width of a nip portion formed with the image carriers in the moving direction of the image carriers 10Y, 10M, 10C and 10K and an elastic member 61c which is fixed by the recessed portion 63 and wound around the base material 61b and whose volume resistivity is 1*10<SP>6< / SP>-1*10<SP>11< / SP>[Omega]cm; and a bias generating portion 110 applying a bias to the nip portion.

Description

technical field [0001] The present invention relates to a transfer device, an image forming device and an image forming method related to electrophotography. Background technique [0002] Conventionally, it has been disclosed that a transfer roller having an elastic layer is used as a transfer roller of an image forming apparatus (Patent Document 1). The image forming apparatus described in Patent Document 1 describes the shape considered to be a concave portion, but does not mention its function. In addition, as the transfer method, only the thermal transfer method is described, but the bias transfer method is not described. [0003] [Patent Document 1]: Special Publication No. 2000-508280 [0004] However, since the transfer method of Patent Document 1 is a thermal transfer method, the present invention is a bias transfer method, and therefore, it is necessary to impart electrical resistance to the elastic member of the transfer member. When such an elastic member is us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/16G03G15/00
CPCG03G15/1685G03G15/6558
Inventor 千叶悟志上条浩一
Owner SEIKO EPSON CORP
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