EP 0147341 A3 19850807 - METHOD FOR ELECTROPHOTOGRAPHIC REPRODUCTION WITH REVERSE DEVELOPMENT ON A CONDUCTOR BASIS BY MEANS OF A MAGNETIC MONOCOMPONENT DEVELOPMENT POWDER, AND DEVICE USING THIS METHOD
Title (en)
METHOD FOR ELECTROPHOTOGRAPHIC REPRODUCTION WITH REVERSE DEVELOPMENT ON A CONDUCTOR BASIS BY MEANS OF A MAGNETIC MONOCOMPONENT DEVELOPMENT POWDER, AND DEVICE USING THIS METHOD
Publication
Application
Priority
FR 8320799 A 19831222
Abstract (en)
[origin: US4607940A] A reversed development electrophotographic reproduction process for developing a charge image on a photoconducting support using a single component magnetic developer provides copies with improved densities of the dark regions, better definition and less contamination of the background. This is accomplished by connecting each of the photoconductor surface, the magnetic means for transferring the magnetic development powder from a supply source to the charge image to thereby form the powder image, and the conducting support to which the powder image is transferred to at least one voltage generator via the terminal having the same polarity as that of the charge on the photoconductor surface. Thus, for a positively charged selenium alloy photoconducting surface, the photoconductor, magnetic means, and conducting support are each connected to the positive terminal of preferably a single voltage generator. Apparatus for carrying out the process is also provided.
IPC 1-7
IPC 8 full level
G03G 13/22 (2006.01); G03G 15/00 (2006.01); G03G 15/05 (2006.01); G03G 15/16 (2006.01)
CPC (source: EP US)
G03G 15/161 (2013.01 - EP US); G03G 15/162 (2013.01 - EP US)
Citation (search report)
- [A] EP 0040128 A2 19811118 - RHONE POULENC SYST [FR]
- [A] FR 1421638 A 19651217 - AUSTRALIA RES LAB
- [A] FR 1575733 A 19690725
- [A] US 4415254 A 19831115 - NISHIKAWA MASAJI [JP]
Designated contracting state (EPC)
AT BE CH DE GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0147341 A2 19850703; EP 0147341 A3 19850807; DK 625884 A 19850623; DK 625884 D0 19841221; FR 2557317 A1 19850628; FR 2557317 B1 19860418; JP S60221773 A 19851106; US 4607940 A 19860826
DOCDB simple family (application)
EP 84420207 A 19841211; DK 625884 A 19841221; FR 8320799 A 19831222; JP 27056184 A 19841221; US 68316984 A 19841218