Conducting roller

A conductive roller, conductive technology, applied in the direction of circuits, electrographics, electrical components, etc., can solve the problems of scattering, toner diffusion, toner coating blur, etc., to achieve low resistance, reliable adhesion, Effect of suppressing toner spreading

Inactive Publication Date: 2004-06-02
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in the conductive roller in the above-mentioned Japanese Patent Laid-Open No. 11-249386, only the nip portion (Japanese: ニップ) at the end is made small to increase the capacitance and increase the resistance value on the outside. , if the electrostatic capacitance of the material itself becomes too large by changing the frequency, there is still a problem of toner diffusion
That is, if the overall electrostatic capacitance is not limited within a certain range, there is a problem that blurring and scattering of the toner application will occur even in parts other than the end parts.

Method used

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Examples

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Embodiment 1～ Embodiment 16

[0071] In any of Examples 1 to 16, as shown in Table 1, the common logarithmic value of the resistance is within the scope of the present invention, and the electrostatic capacitance of the conductive roller at 100 Hz is also 50pF within the scope of the present invention. the following. Examples 1 to 6, 16, using conductive added salt 1; Examples 7 to 10, using conductive added salt 2; Example 11, using conductive added salt 5; Example 12, using conductive added salt 3; In Example 13, the conductive additive salt 4 was used; the type of the conductive additive salt of the salt having an anion having a fluorine group and a sulfonyl group was changed. In Examples 14, 15, no conductive salt was added.

[0072] In Examples 11 to 13 in which the conductive additive salt 3 to 5 were used, the increase in energization can be reduced due to the increase in cations.

[0073] In addition, in Example 16, a salt in which conductive addition salt 1 was mixed in the EO-PO-AGE copolymer in adva...

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PUM

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Abstract

As to the conductive roll 10 equipped with a core bar 2 and an conductive elastic layer 1 on the surface side of the core bar 2, electrostatic capacity at 100Hz is set to <=50pF, and electric resistance at the applied voltage 1000V is set to >=10<5>[Omega] and <=10<9>[Omega]. Electrostatic capacity C(L) at the low frequency Hz(L) of AC and electrostatic capacity C(H) at the high frequency Hz(H) of AC are set to relation 0<(C(L)-C(H)) / (log10Hz(H)-log10Hz(L))<10. The conductive roll has excellent electric characteristic and capable of surely restraining toner scattering.

Description

Technical field [0001] The present invention relates to a conductive roller. Specifically, it relates to an image forming mechanism for electrophotographic devices that can be used in office (OA) equipment such as printers, copiers, facsimile machines, automatic teller machines (ATM), etc., and electrical A conductive roller with improved characteristics and suppression of toner diffusion. Background technique [0002] In the conductive mechanism in electrophotographic devices such as printers, electrophotographic copiers, facsimile devices, etc., a charging roller that electrically charges the photosensitive drum, a toner supply roller for conveying toner, and a toner The agent adheres to various conductive rollers used in image forming apparatuses such as the developing roller for the photoreceptor and the transfer roller for transferring the toner-coated image from the photoreceptor to the paper. [0003] Such a conductive roller is generally com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C13/00B25F5/02G03G5/04G03G15/02G03G15/14
CPCG03G2215/0861G03G15/0233G03G2215/1614F16C13/00
Inventor 上坂宪市服部高幸越智淳
Owner SUMITOMO RUBBER IND LTD
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