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Cleaning unit and image forming apparatus

A technology for cleaning units and imaging equipment, applied to the equipment of electric recording technology using charge patterns, electric recording technology, optics, etc., to achieve the effects of inhibiting damage, improving cleaning performance, and long service life

Inactive Publication Date: 2007-01-31
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The technique disclosed in Japanese Patent Application Laid-Open No. 2002-244522 relates to a technique aimed at scraping off discharge products with a fiber body by wiping the photoreceptor surface with the fiber body on the upstream side with respect to the photoreceptor rotation direction of the brush, and for Residual toner particles adjusted to one polarity by techniques disclosed in JP-A-63-15278, JP-A-2004-239999, JP-A-2001-109351 and JP-A-2001-3413 , when they pass through the fibrous body, they become charged with opposite polarity due to triboelectric charging, so there is a fear that the residual toner particles cannot be removed by the brush

Method used

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  • Cleaning unit and image forming apparatus
  • Cleaning unit and image forming apparatus
  • Cleaning unit and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0262] As a test machine, a modified Docu-Center Color500 from Fuji Xerox Co., Ltd. was used. That is, the photoreceptor A having a protective layer formed on the surface is assembled as a photoreceptor. Assemble a cleaning unit equipped with a cleaning blade A and a cleaning auxiliary component A. Under low temperature / low humidity (10°C, 20% relative humidity) and high temperature / high humidity (28°C, 80% relative humidity), use Docu-Center Color500 product developer as the developer to perform durability of approximately 100,000 images Performance test to evaluate the wear of the photoreceptor and scratches on the photoreceptor (photoreceptor roughness). In addition, the occurrence of film formation under low temperature / low humidity is evaluated, and the image flow under high temperature / high humidity is evaluated. These results are listed in Table 2 along with the comprehensive assessment.

[0263] Cleaning unit

Outcome evaluation

Accessory

Scraper ...

Embodiment 2～5

[0288] Except that the cleaning blade was changed to that shown in Table 2, the same test and evaluation as in Example 1 were performed using the same image forming apparatus as in Example 1. The results are shown in Table 2.

Embodiment 6～8

[0290] Except that the cleaning blade was changed to that shown in Table 2, the same imaging device as in Example 1 or 2 was used to perform the same test and evaluation as in Example 1. The results are shown in Table 2.

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Abstract

This invention relates to a cleaning unit comprising: a cleaning blade that keeps a front end of rubber material in contact with the surface with a pressure so as to scrape residual toner left on the surface of the photoreceptor and a fiber body having multiple fibers in contact with the surface of the photoreceptor in the upstream in the cyclic moving direction of the surface of the photoreceptor with respect to the cleaning blade, wherein the cleaning blade satisfies conditions A>=-2.5xB+102 and 6.3<=B<=19.6, where A designates a contact angle ( DEG ) with pure water under 23 DEG C, 55% RH and B designates 100% modulus (MPa) at 23 DEG C.

Description

Technical field [0001] The present invention relates to a cleaning unit used in electrophotographic methods including copiers, facsimile machines, and printers for removing residues such as residual toner, and an image forming apparatus equipped with the cleaning unit. Background technique [0002] According to the conventional electrophotographic method, during the toner image forming cycle, the surface of the photoreceptor, which is cyclically moved, such as rotating around the central axis in a predetermined direction, is charged with a charger, and the surface of the charged photoreceptor is irradiated with an exposure light source. An electrostatic latent image is formed on the surface of the photoreceptor, and then the electrostatic latent image is developed by a developer to form a toner image on the surface of the photoreceptor, and the toner image formed on the surface of the photoreceptor is transferred to a predetermined The surface of the transfer body (recording medi...

Claims

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Application Information

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IPC IPC(8): G03G21/10G03G15/00
Inventor 重崎聪奥山浩江坂廼邉真新宅宽治杉浦聪哉曾我达也岩崎仁黑田能孝
Owner FUJIFILM BUSINESS INNOVATION CORP
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