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Developing apparatus, processing box and image forming method

A technology of developing device and process cartridge, which is applied in the direction of developer, electric recording process applying charge pattern, equipment of electric recording process applying electric charge pattern, etc. question

Inactive Publication Date: 2005-06-22
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if in order to maintain the above-mentioned contact probability, while the processing speed is increased, the moving speed ratio of the charging member relative to the moving speed of the image carrier is maintained or increased, the large increase in torque leads to an increase in cost, and it is easy to produce image carrier. Damage to charging parts and contamination inside the machine due to scattering of transfer residual toner particles attached to or mixed with charging parts

Method used

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  • Developing apparatus, processing box and image forming method
  • Developing apparatus, processing box and image forming method
  • Developing apparatus, processing box and image forming method

Examples

Experimental program
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Embodiment

[0505] Hereafter, although an Example is given and this invention is demonstrated more concretely, this invention is not limited to these Examples.

[0506] First, a production example of a photoreceptor as a latent image carrier used in an embodiment of the present invention will be described.

manufacture example

[0508] A photoreceptor (hereinafter referred to as "OPC photoreceptor") using an organic photoconductive material for negative charging was produced. For the base of the photoreceptor, an aluminum cylinder with a diameter of 24 mm was used. On this cylinder, the following layers are coated by dipping and stacked sequentially to obtain the following: Figure 5 The photoreceptor of the composition shown.

[0509] The first layer is the conductive layer 12, which is a conductive particle dispersion resin layer (based on phenolic resin) with a thickness of about 20 μm to make the defects of the aluminum substrate 11 uniform, and to prevent the occurrence of interference fringes caused by the reflection of laser exposure. The substance formed by dispersing tin oxide and titanium oxide powder in the resin is the main body).

[0510] The second layer is the anti-positive charge injection layer 13, which prevents the positive charge injected from the aluminum substrate 11 from offse...

manufacture example Ts-1

[0520] · Styrene-butyl acrylate-monobutyl maleate copolymer

[0521] (Tg: 63°C, molecular weight: Mp12000, Mn6500, Mw230000)

[0522] 100 parts by mass

[0523] ・Magnetic iron oxide (average particle size 0.2μm, coercivity under 795.5kA / m magnetic field

[0524] (Hc)5.2kA / m, saturation magnetization (σs)85Am 2 / kg, residual magnetization (σr) 5.0Am 2 / kg)

[0525] 90 parts by mass

[0526] ・Monoazo iron complex (negative charge control agent) 2 parts by mass

[0527] 4 parts by mass of low molecular weight ethylene-propylene copolymer

[0528] The above materials were mixed with a mixer, the mixture was melted and kneaded with an extruder heated to 130°C, the obtained kneaded product was cooled, coarsely pulverized, and finely pulverized with a jet air pulverizer. Strict classification is carried out in a multi-divided classification device utilizing the Coanda effect to obtai...

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Abstract

The present invention provides a developing device having at least a developing container for accommodating a developer, a developer carrier for carrying the developer contained in the developing container and conveying it to a developing area, and a A developing device of a developer layer thickness regulating member that restricts the layer thickness of the developer carried on the developer carrier, wherein the developer has at least toner particles and conductive fine particles, and the toner particles Containing a binding resin and a colorant, the toner particles have a sphericity a calculated by the following formula of less than 0.970, the developer carrier has at least a substrate and a resin coating layer formed on the substrate, and the resin coating layer contains at least a coating Bonding resin and positively charged material for the layer, sphericity a=L 0 / L type, L 0 denotes the perimeter of a circle having the same projected area as the particle image, and L denotes the perimeter of the projected image of the particle. In addition, the present invention provides a process cartridge having the above developer and an image forming method using the above developer.

Description

field of invention [0001] The present invention relates to a developer used in an electrophotographic device, an electrostatic recording device, a magnetic recording device, and the like, an image forming method using the developer, and a process cartridge having the developer. [0002] In addition, the present invention also relates to image forming machines, such as copiers, printers, facsimile machines, and plotters, which form an image by forming a toner image on an image carrier in advance and transferring the toner image to a recording medium such as a transfer material. devices and process cartridges that can be arbitrarily attached and detached to these image forming devices. Background technique [0003] In recent years, in the image forming method using the electrophotography method, as a charging device for a charged body such as a latent image carrier, many kinds of contact charging devices have been proposed, because it has low ozone, Advantages such as low pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/08G03G9/08G03G15/09
CPCG03G9/0827G03G15/0928G03G2221/183G03G15/08
Inventor 齊木一纪後関康秀嶋村正良明石恭尚藤岛健司大竹智岡本直树
Owner CANON KK
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