ATBECHDEDKESFRGBGRITLILUNLSEMCPTIESILTLVFIROMK..................................RDIM360 (Ver 1.5 21 Nov 2005) - 1100000/00849644EUROPEAN PATENT APPLICATIONA319980701EP97203909.319971212enenen96203585 19961220EP19980701199827199806241998266 6G 03G 15/09 AdeUmkehrentwicklungssystemenReversal developing systemfrSystème de dévelopement en inversion1Océ-Nederland B.V.002410309701ASt. Urbanusweg 435914 CC VenloNLMooren, Gerardus Johannes CatharinaKerboschstraat 155913 WJ VenloNLValk, JohannesHunze 532911 EG Nieuwerkerk a/d IJsselNLHanneman, Henri W., Dr.00049472Océ-Technologies B.V. Patents & Information St. Urbanusweg 43 P.O. Box 1015900 MA VenloNLATBECHDEDKESFIFRGBGRIEITLILUMCNLPTSEALLTLVMKROSI19980701199827

A reversal developing system for developing a charge pattern with electrically charged toner powder, comprising:

an image forming medium (10) carrying said charge pattern,
a movable developing member (12) transporting said charged toner powder to a developing zone (14) adjacent to said image forming medium (10),
means for applying a reversal development voltage to said movable developing member (12) so as to cause said charged toner powder to deposit on virtually uncharged areas of said image forming medium (10),
a cleaning electrode (42) disposed at a distance from the surface of the developing member (12) and having an applied voltage of such a magnitude that toner particles which adhere to the surface of the developing member (12) are released therefrom under the influence of the electric field existing in the space between the developing member (12) and the cleaning electrode (42).