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Cleaning apparatus for a rotatable member
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A technology for rotating parts and cleaning devices, applied in corona discharge devices, electrical components, electrography, etc., can solve problems such as uneven cleaning, uneven removal of electricity, impact, etc., to simplify maintenance and prevent live parts and damage Effect
Inactive Publication Date: 2009-01-28
SHARP KK
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However, in this method, the electric field for removing the residual developer is opposite to the charging polarity of the photosensitive drum, which adversely affects the charging characteristics of the photosensitive drum.
[0012] Furthermore, the problem of such a rotating member is common to a brush for removing electricity that contacts with a photosensitive drum, etc., or a brush for cleaning that contacts a photosensitive drum, etc. Uneven electricity or cleaning
That is, dirt such as developer adheres to the rotating member, causing unevenness in the characteristics of the rotating member
Method used
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Embodiment 1
[0054] FIG. 1 is a side view showing an image forming apparatus to which the present invention is applied. The image forming apparatus 1 includes a document conveying unit 2 , a document reading device 3 , a printing unit 4 , a recording paper conveying unit 5 , a paper feeding unit 6 , and a paper output tray 7 .
[0055] In the document conveyance section 2, after at least one document is placed on the document set tray 11, the document is pulled out from the document set tray 11 one by one and conveyed, and when the front end of the document reaches the PS roller 12, the conveyance of the document is temporarily stopped. The front end of the document is made parallel to the PS roller 12 . And, after choosing to synchronize with the image recording action carried out by the printing section 4, connect the clutch between the PS roller 12 and the drive shaft, drive the PS roller 12 to make it rotate, and then convey the original by the PS roller 12, so that the original is pla...
Embodiment 2
[0110] Fig. 10 is a side view schematically showing Embodiment 2 of the image forming apparatus of the present invention. This image forming apparatus is an apparatus for forming a color image, and has four visible image forming units 60Y, 60M, 60C, and 60B and a transfer fixing roller 61 .
[0111] In each visible image forming unit 60Y, 60M, 60C, 60B, a brush charging device 22 , a laser scanning unit 63 , a developer 64 , a transfer roller 65 , and a cleaner 66 are provided around the photosensitive drum 62 . Toners of yellow (Y), magenta (M), cyan (C), and black (B) are accommodated in the developing devices 64 of the respective visible image forming units 60Y, 60M, 60C, and 60B. In addition, in each of the visible image forming units 60Y, 60M, 60C, and 60B, after the brush charging device 22 uniformly charges the surface of the photosensitive drum 62, the laser beam of the laser scanning unit 63 is modulated according to the image information, and the laser beam is irradi...
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Abstract
A cell film removal rate for a foamed elastic body is set so that fouling such as developer stuck to the rotary brush can be absorbed through each cell of the foamed elastic body during one period of the maintenance of an image forming apparatus. For example, the cell film removal rate of the foam elastic body is set to >=60% or >=80%. In the case where the cell film removal rate of the foamed elastic body is set to >=60%, satisfactory image quality can be securely maintained until the number of sheets of paper subjected to recording by the image forming apparatus reaches 20,000. On the other hand, in the case that the cell film removal rate of the foam elastic body is set to >=80%, satisfactory image quality can be securely maintained until the number of sheets of paper subjected to recording by the image forming apparatus reaches 30,000.
Description
[0001] This application claims priority based on Japanese Patent Application No. 2004-157951 filed in Japan on May 27, 2004 and Japanese Patent Application No. 2005-144210 filed in Japan on May 17, 2005. All content is hereby incorporated into this application. technical field [0002] The present invention relates to a cleaning device used for a rotating member of an electrophotographic image forming apparatus. Background technique [0003] As is well known, in an electrophotographic image forming apparatus, the photosensitive drum (electrostatic latent image carrier) is rotated, and the surface of the photosensitive drum is uniformly charged by a charging device, and the surface of the photosensitive drum is scanned by a light beam to form static electricity on the photosensitive drum. Latent image, the developer is attached to the electrostatic latent image on the photosensitive drum, the developer image is formed on the photosensitive drum, the developer image is transfe...
Claims
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Application Information
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