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Charged parts and image forming apparatus with the same charged parts

A technology of charged parts and images, applied in the direction of corona discharge devices, electrical components, electrical recording technology using charge patterns, etc.

Inactive Publication Date: 2006-11-29
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, it is also significant in the printing test after long-term storage in the same environment

Method used

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  • Charged parts and image forming apparatus with the same charged parts
  • Charged parts and image forming apparatus with the same charged parts
  • Charged parts and image forming apparatus with the same charged parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0051] figure 1 is a schematic configuration diagram of the charging member of the present invention or an image recording apparatus using the charging member of the present invention. This image recording device is a laser printer of a direct injection charging method utilizing a transfer electrophotography method.

[0052] (1) Overall configuration of the image recording device

[0053] 1 is an image carrier as a charged body, in this example, a drum type negative polarity OPC photoreceptor (negative photoreceptor, hereinafter referred to as a photoreceptor drum) with a diameter of 24 mm. The photosensitive drum 1 is rotationally driven in the direction of the arrow at a constant speed of a linear speed of 47 mm / sec (=processing speed PS, printing speed). The photosensitive drum 1 will be described in detail below.

[0054] 20 is a charging device, which charges the peripheral surface of the rotating photosensitive drum 1 to a predetermined polarity and potential. The c...

Embodiment approach 2

[0162] Figure 4 It is a schematic configuration diagram showing an image recording device using a second embodiment of the charging device of the present invention.

[0163] The image recording apparatus of this embodiment is a laser printer utilizing transfer electrophotographic processing, direct injection charging, and toner circulation processing (cleanerless system). The same points as those of the image recording apparatus according to the first embodiment will not be described again, and only the points of difference will be described.

[0164] The dedicated feeder 3 for supplying the charged particles to the charging roller 2 is not installed on the charging device 20 . Instead, the charged particles m are added to the developer t of the developing device 60, and when the electrostatic latent image is developed on the photosensitive drum 1, they adhere to the surface of the photosensitive drum 1 together with the toner, and as the photosensitive drum 1 rotates, Then, ...

Embodiment 1

[0198] In the image forming apparatus according to Embodiment 1, charged particles m having a particle diameter of 1.3 μm and an aggregation degree of 60% are used, and are applied to the charging roller 2 by the charged particle supplier 3 .

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PUM

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Abstract

A charging member for charging a member to be charged and an image forming apparatus provided with the same have electrically conductive particles and an electrically conductive particle bearing member having elasticity and bearing the electrically conductive particles thereon, and the degree of cohesion of the electrically conductive particles is 0.1 to 85%. Thereby, the non-uniformity of a halftone image peculiar to particle charging can be improved.

Description

technical field [0001] The present invention relates to a charging member for charging a body to be charged. It also relates to an image forming apparatus such as a copier or a printer that charges the surface of the charged body by contacting the charged body with a charging member. Background technique [0002] In the past, the contact charging device made the charged body such as the image carrier contact the conductive charging member (contact charging member and contact charger) such as a roller type (charging roller), a brush type, a magnetic brush type, and a blade type. A device that applies a predetermined charging bias voltage to the contact charging member to charge the surface of the charged body with a predetermined polarity and potential. [0003] These electrification devices are collectively referred to as contact electrification devices, but each device is greatly different from the viewpoint of the electrification mechanism (charging mechanism, electrifica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/16G03G21/00G03G15/02G03G15/08
CPCG03G15/0216
Inventor 儿野康则奥田幸一清水康史吉田雅弘
Owner CANON KK