Method and apparatus for forming high quality images in an elect

Details Method and apparatus for forming high quality images in an elect Method and apparatus for forming high quality images in an elect

1998-11-02

1999-12-21

Smith, Matthew S.

Electrophotography

Image formation

Treatment of developed image prior to transfer

399237, G03G 1516

Patent

active

060060611

ABSTRACT:
A method and apparatus for producing high quality toner images in an electrostatic printing machine. The method using the apparatus includes (a) forming an initial developed toner image on a photoreceptor using initial developed toner image forming assemblies including a first charging device for uniformly charging the photoreceptor, and a development assembly including charged toner solids having a single charge polarity; and (b) refining the initial developed toner image using reverse charge printing (RCP) assemblies including a second charging device for reversing charge polarity on unwanted toner solids in background areas of the initial developed toner image, and for removing such unwanted toner solids from such background areas, thereby producing a high quality final toner image having sharp image area edges and highly clean background areas.

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