Image forming device

Details Image forming device Image forming device

1999-04-16

2000-04-04

Grimley, Arthur T.

Electrophotography

Control of electrophotography process

Having temperature or humidity detection

399297, G03G 1500

Patent

active

060471441

ABSTRACT:
A toner image formed on the photosensitive body (21) is transferred to printing paper by applying a voltage from a transfer roller (25) in an image transfer section of an image forming device (1). The transfer roller (25) is provided with a transfer voltage generating circuit (31) connected to a control unit (30). Information about an optimum transfer voltage is gathered from a look-up table (34) provided in a memory (33), in accordance with environmental conditions such as temperature and humidity in the device (1) which are detected by a sensor (35). The voltage to be applied to the transfer roller (25) is determined by the control unit (30). The voltage applied to the transfer roller between sheets of printing paper is also changed in accordance with the detected environmental conditions.

REFERENCES:
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patent: 5119141 (1992-06-01), Bhagat
patent: 5128717 (1992-07-01), Uchikawa et al.
patent: 5151736 (1992-09-01), Ohzeki et al.
patent: 5276483 (1994-01-01), Hasegawa et al.
patent: 5287144 (1994-02-01), Takeda
patent: 5621504 (1997-04-01), Wakamatsu et al.
patent: 5682575 (1997-10-01), Komori
patent: 5822651 (1998-10-01), Yim et al.

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