Contamination control for xerographic developing systems

Details Contamination control for xerographic developing systems Contamination control for xerographic developing systems

1986-03-03

1987-05-19

Prescott, A. C.

Photocopying

Including fiber optics

355 14D, 355 15, 430120, 118652, 15301, G03G 1508

Patent

active

046662820

ABSTRACT:
To control pressures in the developer housing of a xerographic machine, a fan with inlet connected to the housing interior through a particulate filter is used. To reduce the effect of filter loading, a mixing chamber is interposed having a fresh air inlet, the dimension of which is substantially greater than the passage from the developer housing so that as the pressure drop across the filter rises as the filter traps more and more particles, the flow of contaminated air from the developer housing remains substantially constant.

REFERENCES:
patent: 3534427 (1970-10-01), Severynse
patent: 3932910 (1976-01-01), Shimoda
patent: 3969785 (1976-07-01), Ogawa et al.
patent: 4093369 (1978-06-01), Hewitt
patent: 4121947 (1978-10-01), Hemphill
patent: 4142269 (1979-03-01), Seeberger
patent: 4583112 (1986-04-01), Morano et al.

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