Combined transfer and registration system for electrophotographi

Details Combined transfer and registration system for electrophotographi Combined transfer and registration system for electrophotographi

1979-10-17

1981-11-24

Moses, R. L.

Photocopying

Including fiber optics

29132, G03G 1500

Patent

active

043020933

ABSTRACT:
A combined image transfer and registration system for an electrophotographic copier in which a somewhat conductive transfer roller having a surface hardness which is approximately the same as that of the copy material is brought into spaced relationship with the photoconductor surface at a distance less than the thickness of the copy material. Prior to the arrival of the leading edge of the developed image adjacent to the transfer roller a length of copy material has been fed to the nip between a registration roller and the transfer roller to permit a registration signal to initiate rotation of the transfer roller through an overrunning clutch to move the copy material into the space between the image bearing surface and the transfer roller to clutch the transfer roller to the drum to cause the copy material to move synchronously with the image as the transfer takes place. A bias potential may be applied to the transfer roller to assist in effecting transfer.

REFERENCES:
patent: 3751156 (1973-08-01), Szostak et al.
patent: 3879121 (1975-04-01), Simpson
patent: 3936170 (1976-02-01), Shibano et al.

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