Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1978-11-30
1980-08-19
Braun, Fred L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
1525651, G03G 2100
Patent
active
042181321
ABSTRACT:
A drum cleaning apparatus for an electrophotographic copying machine includes a toner image forming drum rotatable about a horizontal axis, a blade for scraping off toner particles deposited on the cylindrical outer surface of the drum, an inclined toner particle guide plate having an upper edge bearing on the outer surface of the drum upstream of the scraping blade as viewed in the rotating direction of the drum and a lower edge positioned at an opening of a toner collecting container, a holding structure for supporting the toner guide plate and mounted swingably on a shaft with play, the shaft extending in parallel with the axis of said drum. Feeble and periodical shocks are applied to the toner guide plate by way of the supporting shaft thereby to promote the sliding down of the toner particles on and along the guide plate into the collecting container to prevent accumulation of the particles on the plate.
REFERENCES:
patent: 3740789 (1973-06-01), Ticknor
patent: 3926517 (1975-12-01), Nagahara
patent: 3977898 (1976-08-01), Hwa
patent: 4140388 (1979-02-01), Ikesue
Iwai Fumio
Koiso Jun-ichi
Kokiso Masakazu
Ogino Tamio
Braun Fred L.
Konishiroku Photo Industry Co,., Ltd.
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