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Title:
CONTACT CHARGER AND IMAGE FORMING APPARATUS
Document Type and Number:
Japanese Patent JP2005173115
Kind Code:
A
Abstract:

To provide a contact charger having a brush for charging brought into contact with a body to be charged, and easily performing uniform charging stable over a long period, and further inexpensively performing stable charging at a low voltage in an ozone-less state over a long period, and to provide an electrophotographic image forming apparatus capable of forming an excellent image whose image noise is restrained over a long period by adopting such a charger.

In the contact charger 2 having the brush 21 brought into contact with the body to be charged (for example, photoreceptor) 1 and charging the body to be charged 1 by making charging assisting particles 3 intervene between the brush and the body to be charged 1, particles which are like styluses and which satisfy conditions that an aspect ratio is ≥2 and ≤10,000 and L2/T≤200 (L is the length (μm) of the major axis of the particle, and T is the thickness (denier) of the fiber of the brush) are adopted as the particles 3. The image forming apparatus is equipped with such a charger, the photoreceptor 1 electrified by the charger, an exposure device 4 forming an electrostatic latent image by image-exposing the photoreceptor, and a developing device 5 developing the electrostatic latent image on the photoreceptor, and forms the image on a recording medium S by an electrophotographic system.


Inventors:
Nagatomo, Yuji
Tango, Makiko
Application Number:
JP2003000411934
Publication Date:
June 30, 2005
Filing Date:
December 10, 2003
Export Citation:
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Assignee:
KONICA MINOLTA BUSINESS TECHNOLOGIES INC
International Classes:
G03G15/02; A46B7/10; A46D1/00; (IPC1-7): G03G15/02; A46B7/10; A46D1/00
Attorney, Agent or Firm:
谷川 昌夫