X-ray apparatus comprising a photoconductor and a corona chargin

Details X-ray apparatus comprising a photoconductor and a corona chargin X-ray apparatus comprising a photoconductor and a corona chargin

1994-09-28

1995-11-14

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Xeroradiography

378 28, G03G 1326

Patent

active

054673780

ABSTRACT:
An X-ray apparatus, includes a photoconductor for convening X-rays into a charge pattern and a corona charging device for charging the surface of the photoconductor to a defined potential prior to an X-ray exposure. Deposits of dust on the corona charging device, and the associated artefacts in the X-ray image, are avoided in that there is provided a control unit for operating the corona charging device in a charging mode and in a cleaning mode, a first voltage being applied to the corona charging device in the charging mode whereas in the cleaning mode a second voltage is applied thereto which has, at least temporarily, a polarity which opposes that of the first voltage.

REFERENCES:
patent: 5341409 (1994-08-01), Conrads et al.

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