Electrostatographic apparatus comprising improved drum cleaning

Details Electrostatographic apparatus comprising improved drum cleaning Electrostatographic apparatus comprising improved drum cleaning

1977-08-15

1979-05-15

Moses, R. L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

1525651, 118652, G03G 2100

Patent

active

041545222

ABSTRACT:
A scraper blade or roller engages the surface of a photoconductive drum and causes residual toner substance to pile up. The pile of residual toner is then released and carried by the drum to a position where it is removed therefrom by gravity, another scraper blade or a magnetic brush which bifunctions as a developing means. A groove may be formed in the drum surface into which the piled-up residual toner substance drops to be carried away for removal. A bias electrode or electromagnet which attracts the toner substance may replace the groove.

REFERENCES:
patent: 3700328 (1972-10-01), Davidge et al.
patent: 3728016 (1973-04-01), Harbour et al.
patent: 3917398 (1975-11-01), Takahashi et al.
patent: 3918808 (1975-11-01), Narita

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