EP 0646848 B1 19971203 - Radiographic apparatus with a photoconductor and a corona charging system
Title (en)
Radiographic apparatus with a photoconductor and a corona charging system
Title (de)
Röntgenaufnahmegerät mit einem Photoleiter und mit einer Korona-Aufladeeinrichtung
Title (fr)
Appareil de radiographie avec un photoconducteur et un système de chargement à effet corona
Publication
Application
Priority
DE 4333325 A 19930930
Abstract (en)
[origin: EP0646848A1] The invention relates to a radiographic apparatus having a photoconductor (1) for converting X-radiation into a charge pattern, and having a corona charging system (3) for charging the surface of the photoconductor to a defined potential before taking a radiograph (X-ray photograph). Deposits of dust on the corona charging system and the artefacts associated therewith in the X-ray photograph are avoided in this case by providing a control unit (6) for operating the corona charging system in a charging mode and in a cleaning mode. In the charging mode, a first voltage (U1), and in the cleaning mode a second voltage (U2) of a polarity which is - at least for a time - opposite to that of the first voltage is applied to the corona charging system. <IMAGE>
IPC 1-7
IPC 8 full level
G21K 4/00 (2006.01); G01T 1/29 (2006.01); G03B 42/02 (2006.01); G03G 15/02 (2006.01)
CPC (source: EP US)
G03G 15/0258 (2013.01 - EP US); G03G 15/0291 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0646848 A1 19950405; EP 0646848 B1 19971203; DE 4333325 A1 19950406; DE 59404714 D1 19980115; JP H07191524 A 19950728; US 5467378 A 19951114
DOCDB simple family (application)
EP 94202805 A 19940928; DE 4333325 A 19930930; DE 59404714 T 19940928; JP 23143594 A 19940927; US 31456394 A 19940928