Photocopying – Contact printing – Light boxes
Patent
1994-06-08
1995-10-03
Royer, William J.
Photocopying
Contact printing
Light boxes
355309, 355317, G03G 1501
Patent
active
054556686
ABSTRACT:
An electrostatographic single-pass multiple station multi-color printer for forming an image onto a web, eg of paper, is described. A plurality of toner image-producing electrostatographic printing stations each have a rotatable endless surface such as the photoconductive surface of a cylindrical drum onto which a toner image can be formed. The paper web is conveyed in succession past the printing stations. The speed and tension of the web is controlled while it is running past the printing stations. Guiding rollers which determine for the web wrapping angles of about 15.degree. about the drum surface. A corona device transfers the toner image on each drum onto the web. The corona device, the wrapping angles .omega. and the web tension are such that adherent contact of the web with the drum surface is such that the moving paper web controls the peripheral speed of the drum in synchronism with the movement of the web. Slippage between the drum surface and the paper web is thereby eliminated, enabling accurate registration of superimposed images on the paper web.
REFERENCES:
patent: 3694073 (1972-09-01), Bhagat
patent: 3893800 (1975-07-01), Wako
patent: 5274428 (1993-12-01), Wong et al.
patent: 5331890 (1994-07-01), Miyoshi et al.
"Color Image-Forming Apparatus"; Research Disclosure, Sep. 1991, No. 329 p. 680.
"Color Xerography With Intermediate Transfer" by J. R. Davidson, Xerox Disclosure Journal, vol. 1, No. 7, Jul. 1976, p. 29.
De Bock Jan J. I.
De Cock Etienne M.
De Schamphelaere Lucien A.
Leroy Rudy D.
Royer William J.
Xeikon NV
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