Method of cleaning a transfer drum of an electrophotographic app

Details Method of cleaning a transfer drum of an electrophotographic app Method of cleaning a transfer drum of an electrophotographic app

1990-01-03

1991-10-15

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355326, 355301, G03G 1516, G03G 1501

Patent

active

050578731

ABSTRACT:
A method of cleaning a transfer drum, which is located to face a photoconductive drum, to remove a toner left untransferred on a transfer film which is wound around the transfer drum. A fur brush rotatable in contact with the transfer drum for removing the toner from the drum and a toner collecting roller rotatable in contact with the fur brush for removing the toner from the brush are prepared. Before the fur brush begins cleaning the transfer film, the toner collecting roller collects the toner deposited on the fur brush. The fur brush is prevented from rubbing itself against a clamping section which is provided on the transfer drum for retaining a paper sheet. The transfer film is discharged while being cleaned. Before the transfer drum is cleaned, the photoconductive drum is cleaned twice or more.

REFERENCES:
patent: 3819263 (1974-06-01), Draugelis et al.
patent: 4483610 (1984-11-01), Takada
patent: 4786943 (1988-11-01), Fukae et al.
patent: 4870466 (1989-09-01), Iida
patent: 4875069 (1989-10-01), Takada et al.

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