JPS62154454U

JPS62154454U -

Info

Publication number: JPS62154454U
Application number: JP4067586U
Authority: JP
Priority date: 1986-03-20
Filing date: 1986-03-20
Publication date: 1987-09-30

Description

[Brief explanation of the drawing]

第１図は本考案の電子写真装置の主要部の一実
施例を示す構成説明図、第２図は現像スリーブに
印加する現像バイアス電圧をパラメータとした現
像スリーブに対向する感光体の部分の表面帯電電
位とかぶりとの関係を示した線図である。１……感光体、２……帯電器、３……レーザ光
、４……現像器、５……帯電用高圧電源、６……
現像スリーブ、７……現像バイアス用電圧電源、
８……帯電電圧設定用可変抵抗器、９……現像バ
イアス電圧設定用可変抵抗器、１０……電圧調整
用可変抵抗器。 Fig. 1 is a configuration explanatory diagram showing an embodiment of the main part of the electrophotographic apparatus of the present invention, and Fig. 2 shows the surface of the portion of the photoreceptor facing the developing sleeve with the developing bias voltage applied to the developing sleeve as a parameter. FIG. 3 is a diagram showing the relationship between charging potential and fog. 1... Photoreceptor, 2... Charger, 3... Laser light, 4... Developer, 5... High voltage power source for charging, 6...
Developing sleeve, 7... Voltage power supply for developing bias,
8... Variable resistor for charging voltage setting, 9... Variable resistor for developing bias voltage setting, 10... Variable resistor for voltage adjustment.

Claims

[Scope of utility model registration request]

In an electrophotographic apparatus, the surface of a photoreceptor charged by a charger is irradiated with light to form a latent image, and the latent image is visualized by a developing device,
a high-voltage power source for developing bias, which has a variable resistor for setting a developing bias voltage that applies a developing bias voltage to a rotatably installed magnetic roller that attaches a magnetic developer to the latent image on the surface of the photoconductor and a developing sleeve that is concentric with the developing sleeve; and a voltage adjusting variable resistor of a charging voltage power supply having a charging voltage setting variable resistor for surface charging the photoreceptor to the same polarity as the developing bias voltage are made into the same body;
When the developing bias voltage is changed by the voltage adjusting variable resistor, the surface charging voltage of the photoreceptor changes at the same time, and the difference between the developing bias voltage and the surface charging voltage of the photoreceptor is always maintained. An electrophotographic apparatus characterized in that the electrophotographic apparatus is configured such that the value is below a certain value.