DUAL MODE ELECTROPHOTOGRAPHIC APPARATUS HAVING DUAL FUNCTION PRINTING BEAM

摘要

DUAL MODE ELECTROPHOTOGRAPHIC APPARATUSHAVING DUAL FUNCTION PRINTING BEAMAbstract of the DisclosureA dual mode xerographic copier/printer is selec-tively operable to form a latent image of an originaldocument on a photoconductor, or to raster-scan the photo-conductor with a laser printing beam which is under thecontrol of a binary-data-defined image to thereby form alatent image thereof.The latent image, whether it is formed in the copymode or the print mode, is toner developed. The developedimage is then transferred to a sheet of copy paper. Thiscopy paper may be of variable size.In the copy mode, the laser printing beam is con-trolled to erase the photoconductor bordering that photo-conductor area which will coincide with the sheet duringtransfer, i.e. bordering the latent image of the originaldocument.In the print mode, a data processor formats thebinary-data-defined image to fit into a photoconductor areacompatible with the size of the copy paper. The resultingelectrical signals then control the laser printing beamto erase the entire photoconductor, exclusive of thebinary-data-defined image.BO9-75-006