Method and apparatus for using vibratory energy to reduce transf

Details Method and apparatus for using vibratory energy to reduce transf Method and apparatus for using vibratory energy to reduce transf

1990-07-02

1992-01-14

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355271, G03G 1514

Patent

active

050815008

ABSTRACT:
An electrophotographic device includes a flexible belt-type sheet of paper or other transfer member into intimate contact with the charge retentive member, bearing a developed latent image and brings a charge retentive surface at a transfer station for electrostatic transfer of toner from the charge retentive surface to the sheet. At the transfer station, a resonator suitable for generating vibratory energy is arranged in line contact with the back side of the charge retentive surface, to uniformly apply vibratory energy to the charge retentive member. Toner is released from the electrostatic and mechanical forces adhering it to the charge retentive surface at the line contact position. In those areas of the latent image characterized by non-initimate contact of the sheet with the charge retentive surface, toner is transferred across the gap by the electrostatic transfer process, despite the fact that the charge on the paper would not normally be sufficient to attract toner to the sheet from the charge retentive surface.

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