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Toner carrying roller and image formation apparatus employing the same

A technology of toner and conveying roller, which is applied in the direction of electric recording process applying charge pattern, equipment and apparatus of electric recording process applying charge pattern, etc.

Active Publication Date: 2013-02-13
株式会社アーケム
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, if the charge amount of the surface layer of the toner conveying roller is small, the surface layer of the roller becomes less likely to absorb toner, and as a result, the amount of toner to be conveyed increases.

Method used

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  • Toner carrying roller and image formation apparatus employing the same
  • Toner carrying roller and image formation apparatus employing the same
  • Toner carrying roller and image formation apparatus employing the same

Examples

Experimental program
Comparison scheme
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Embodiment

[0075] Hereinafter, the present invention will be described more specifically using examples.

[0076] Using the substances shown in the following Table 2 as adhesives for forming the adhesive layer, the figure 1 The shown toner conveying roller is a toner conveying roller in which a conductive elastic layer 3 is supported on the outer periphery of a shaft 1 via an adhesive layer 2 . A metal shaft (diameter φ6 mm, length about 260 mm) was used as the shaft 1 . In addition, as the material of the conductive elastic layer 3, the following polyurethane foam raw material was used: with respect to 100 parts by weight of a prepolymer obtained by reacting polyether polyol with a molecular weight of 5000 and toluene diisocyanate (TDI) in advance, mixed to Conductive agent Ketjen black is dispersed into the water dispersion carbon 20 weight parts that forms in blowing agent water, foaming catalyst tolylene diamine 0.2 weight part, curing catalyst dipropylene glycol 0.2 weight part an...

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PUM

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Abstract

The invention provides a toner transfer roller that secures sufficient density especially at an initial stage of printing, and an image forming apparatus using the same. The toner transfer roller has a shaft (1) and an electroconductive elastic layer (3) made of a urethane foam and supported on the circumference of the shaft (1) by means of an adhesive layer (2) in between. The resistance of the roller at an applied voltage of 100 V is 10 5 © or lower, preferably 10 4.5 © or lower, and the resistance of the roller at an applied voltage of 5 V is 10 6 to 10 8 ©. The adhesive layer (2) contains a hot-melting polymeric adhesive and is formed preferably at a temperature not exceeding the melting point of the hot-melting polymeric adhesive.

Description

technical field [0001] The present invention relates to a toner conveying roller (hereinafter also simply referred to as a "roller") and an image forming apparatus using the same, and more specifically, to a toner conveying roller for the following applications and an image forming apparatus using the same: In an image forming apparatus such as a copier or a printer, toner (developer) is conveyed to an image forming body such as a photoreceptor or paper, and the toner is supplied to a developing roller that forms a visible image on the surface. Background technique [0002] In general, a developing unit in an electrophotographic image forming apparatus such as a copier or a printer, such as Figure 5 As shown, an image forming body 11 such as a photoreceptor holding an electrostatic latent image is provided; by contacting the image forming body 11 and making the toner 20 carried on the surface adhere to the image forming body 11, the electrostatic latent image is changed. A ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/08
CPCG03G15/0808
Inventor 佐藤淳一朗草野晓
Owner 株式会社アーケム
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