Electrophotographic copying machines

Details Electrophotographic copying machines Electrophotographic copying machines

1974-06-21

1976-08-17

Hix, L. T.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

1525652, G03G 2100

Patent

active

039750965

ABSTRACT:
An electrophotographic copying machine with an improved means of cleaning the transfer drum to remove residual pigment uses a cleaning web and just a single driven pressure roller over which the web passes and which is arranged to press the web against the drum surface. The pressure roller constitutes the only movable element for guidance of the web. Preferably, the web is stored folded in concertina fashion in one chamber of a disposable cassette and the used web is returned to another chamber of the cassette. The invention obviates the need for any rotatable supply and take-up rollers for the cleaning web.
There is also provided mechanism for reliably indicating the amount of unused web remaining at any time.

REFERENCES:
patent: 3190198 (1965-06-01), Eichorn
patent: 3667840 (1972-06-01), Engel et al.
patent: 3672764 (1972-06-01), Hartwig et al.

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