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Discharge member, charge eliminating device including the same, and image forming apparatus

A component and image technology, applied in the field of charge removal devices, can solve the problems of photocarrier residue or accumulation, and achieve the effects of increasing discharge points, preventing damage, and high-efficiency discharge

Active Publication Date: 2017-09-26
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to repeated implementation of charge removal by photoelectric charge removal method, part of the photocarrier generated inside the photosensitive layer may remain or accumulate.

Method used

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  • Discharge member, charge eliminating device including the same, and image forming apparatus
  • Discharge member, charge eliminating device including the same, and image forming apparatus
  • Discharge member, charge eliminating device including the same, and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] Use with figure 2 , Figure 5 ~ Figure 7 and Figure 10 In the image forming apparatuses 100 (present inventions 1 to 9) of the first to third embodiments and the fifth embodiment of the image forming unit 9 shown, the decharge performance and durability performance of the decharge roller 25 were evaluated. Regarding the decharge performance, it was checked whether or not a desired post-decharge potential could be obtained after the residual charge of the photosensitive drum 14 was removed by the decharge roller 25 . For durability performance, the presence or absence of streaked images after outputting 50 thousand (50,000) sheets of halftone images with a printing ratio of 25% was confirmed.

[0095] The experimental conditions are as follows: FS-13200 modified machine (manufactured by Kyocera Document Information Systems Co., Ltd.) was used as the image forming apparatus 100, a member in which OPC was laminated on an aluminum tube blank with a diameter of 30 mm was...

Embodiment 2

[0107] use Figure 11 and Figure 12 In the image forming apparatus 100 of the sixth embodiment (the present inventions 10 to 14) in which the magnet member 33 having two magnetic poles with different magnetic forces that become extremely large peaks is arranged inside the photosensitive drum 14, the decharge roller was evaluated. 25 for charge removal performance, image retention and durability. In addition, the image forming apparatus 100 (Comparative Example 5) in which no magnet member is arranged inside the photosensitive drum 14 and the image forming apparatus 100 (Comparative Example 6) in which a magnet member 33 having only one magnetic pole is arranged inside the photosensitive drum 14 are used. to 8), the same evaluation was performed. The test methods, test conditions and evaluation criteria of the charge removal performance and durability performance are the same as in Example 1. With regard to image sticking, the presence or absence of image sticking caused by...

Embodiment 3

[0116] use for Figure 14The eighth embodiment in which the first magnet member 33 a and the second magnet member 33 b are arranged inside the photosensitive drum 14 and the arrangement of the first magnet member 33 a and the second magnet member 33 b is switched according to the state of the image forming apparatus 100 is shown. In the image forming apparatus 100 (present inventions 15 to 20), the decharge performance and durability performance of the decharge roller 25 were evaluated during durable (50,000 sheets) printing and after long-term (8 hours) standing. In addition, the decharge performance and density unevenness of the decharge roller 25 in the half-speed (1 / 2 speed during normal printing) mode, and the decharge performance of the decharge roller 25 during the drum regeneration operation (DR) were also evaluated. and pinhole generation.

[0117] The charge removal performance, the test method, test conditions and evaluation criteria of the durability performance a...

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Abstract

A discharge member includes an electro conductive knit fabric and a support member. The electro conductive knit fabric is knitted in a cylindrical shape using twisted yarn made of twisted metal fibers. The support member is cylindrical and is inserted in the electro conductive knit fabric. The discharge member is disposed to face a member to be discharged in a noncontact manner, in a state where the electro conductive knit fabric is grounded or a voltage is applied to the electro conductive knit fabric.

Description

technical field [0001] The present invention relates to a discharge member that discharges electricity to a photoreceptor, a transfer paper, a fixing member, etc. for Image forming apparatuses such as copiers, printers, facsimile machines, and digital multi-function machines using electrophotography are used. Background technique [0002] In an image forming apparatus using electrophotography, due to the charge remaining after the toner image on the photosensitive drum (image carrier) is transferred, potential unevenness may occur when the next image is formed. Residual image. Therefore, the photosensitive drum is charged again before the charging process is performed and after the residual charge on the photosensitive drum is removed by the charge removing device. Thereby, the surface of the photosensitive drum can be uniformly charged, and generation of afterimages can be prevented. As a method for removing residual charges, a photo-removal method for removing charges b...

Claims

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Application Information

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IPC IPC(8): G03G15/02
CPCG03G15/0291G03G21/06G03G15/2014G03G15/0216D02G3/12
Inventor 清水保猪谷広佳玉置贤一
Owner KYOCERA DOCUMENT SOLUTIONS INC
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