Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1973-05-22
1981-02-24
Martin, Jr., Roland E.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
15 15R, 15 52, 1525651, 259129, 430125, G03G 1522
Patent
active
042524334
ABSTRACT:
A method and apparatus for recovering the residual image from an electrostatic recording surface in an electrostatic copying system which is accomplished by presenting a wiping element in pressure contact with the residual image on the recording surface whereby the residual image is substantially removed therefrom, moving a conductive member in close proximity to the toner particles being removed from the recording surface, applying a DC voltage opposite in polarity to that of the toner particles and of sufficient magnitude to the conductive member whereby the toner particles are attracted onto the surface of the conductive member, and continuously removing the toner particles from the conductive member into a collection zone for reuse in the copying system.
REFERENCES:
patent: 351314 (1886-10-01), Delmage
patent: 2558900 (1951-07-01), Hooper
patent: 2576047 (1951-11-01), Schaffert
patent: 2844123 (1958-07-01), Hayford
patent: 3186838 (1965-06-01), Graff et al.
patent: 3572923 (1971-03-01), Fisher et al.
Brownrout Harvey M.
Kondo Peter H.
Martin Jr. Roland E.
O'Sullivan James Paul
Xerox Corporation
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