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Cleaning device, process cartridge, and image forming apparatus

A cleaning device and a cleaning blade technology are applied in the direction of an electric recording process applying a charge pattern, equipment and instruments for an electric recording process applying a charge pattern, etc., and can solve the problems such as cleaning structures that do not involve small particles and spherical toners. , to increase the line pressure, improve the surface pressure, prevent slippage

Active Publication Date: 2009-01-07
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] However, none of Patent Documents 1 to 6 relates to a low linear pressure and high surface pressure cleaning structure capable of cleaning small and spherical toners.

Method used

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  • Cleaning device, process cartridge, and image forming apparatus
  • Cleaning device, process cartridge, and image forming apparatus
  • Cleaning device, process cartridge, and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0244] In the image forming process of the AC superimposed roller charging method, when zinc stearate is applied to the surface of the image carrier 10 and when zinc stearate is not applied, the action between the cleaning blade 38 and the image carrier 10 is transferred Moment.

[0245] (Experimental conditions)

[0246] Cleaning blade 38: a cleaning blade using existing powder toner (thickness 2mm, free length 7mm)

[0247] (The length of the cleaning blade in the longitudinal direction: 325mm)

[0248] Use a Jupiter machine to measure the cleaning action and compare the average values.

[0249] Diameter of image carrier 10: φ30

[0250] (result)

[0251] Table 2

[0252] Condition

Torque (kg·cm)

Zinc stearate coating none

1.3

Zinc stearate coated

1.9

[0253] As shown in the table, when zinc stearate was applied as a lubricant, the torque was conversely increased. The reason for this is that when lubricant is applied to reduce the s...

Embodiment 3

[0258] In this experiment, the torque value generated during the cleaning operation was measured under the following conditions 1 to 3, and the magnitude relationship was compared.

[0259] (Experimental conditions)

[0260] Cleaning blade A: The existing cleaning blade for powder toner (thickness 2mm, free length 7mm, shape is Figure 8 (C))

[0261] Cleaning scraper B: obtuse front end scraper (shape is Figure 13 (A))

[0262] Cleaning Scraper C: A scraper with an obtuse angle at the front end to reduce the friction coefficient of the front end (the shape is Figure 13 (B))

[0263] (Note: the length of the cleaning blade of A, B, C in the longitudinal direction: 325mm)

[0264] Image carrier: φ30

[0265] (result)

[0266] table 3

[0267] Toner

Piece

Line pressure

(N / cm)

Torque

(kgf·cm)

Condition 1

Powder toner

Scraper A (for powder block)

0.2

1.8

Condition 2

Spherical toner

Scraper B

0.95

3....

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PUM

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Abstract

A low linear pressure and high surface pressure cleaning structure by specifying the material, shape and support structure of a cleaning blade in a cleaning device, a process cartridge and an image forming apparatus is obtained. A tip portion of an elastic cleaning blade 38 supported by a support member 37 which is a so-called blade holder is pressed against a drum-shaped or belt-like image bearing member 10 to remove a residual toner remaining on the image bearing member after image transfer. In such a cleaning device 16, an angle [theta] forming a front edge portion 36 of the cleaning blade is made obtuse and the front edge portion is pressed against the image bearing member at a surface pressure of 2.0g / mm<2> or larger. The surface pressure is a value given by dividing total load applied on the cleaning blade by a contact area of the cleaning blade to the image bearing member.

Description

[0001] This application is a divisional application of an invention patent application named "Cleaning Device, Process Cartridge, and Image Forming Device" filed by Ricoh Co., Ltd. on November 1, 2005, with an application number of 200510119274.3. Technical field [0002] The present invention relates to an image forming apparatus such as a transfer machine, a printer, a facsimile machine, or a composite machine of these. Among them, in particular, it relates to an electrophotographic image forming apparatus that forms a toner image on an image carrier, transfers the toner image directly or indirectly, and records the image on a recording medium such as paper or OHP film. It also relates to a cleaning device for removing toner remaining on the image carrier after image copying in such an image forming apparatus. And, it relates to a process cartridge in which at least a cleaning device and an image bearing body are integrally provided, and these are detachably attached to and detac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G21/00G03G21/18G03G15/00
Inventor 渡边一彦赤藤昌彦成瀬修矢野英俊
Owner RICOH KK
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