Photocopying – Including fiber optics
Patent
1980-10-29
1983-03-22
Rubinson, G. Z.
Photocopying
Including fiber optics
118685, G03G 1509
Patent
active
043773346
ABSTRACT:
A developing unit comprises a guide vane mounted on a portion of the housing which defines a developing opening and disposed for contact with the free end of a developer brush which is formed by a conveying magnetic pole, and a vent formed in the housing at a location removed from the opening. The guide vane cooperates with the brush which moves during the rotation of a non-magnetic sleeve to provide an air pump action, which draws the air containing the toner in suspension into the closed housing of the developing unit from the region of the opening while the vent acts to reduce the internal air pressure within the housing which tends to increase as a result of the air pump action.
REFERENCES:
patent: 3685485 (1972-08-01), Kutsuwada et al.
patent: 3909864 (1975-10-01), Tanaka et al.
patent: 3942889 (1976-03-01), Kurita et al.
patent: 3965524 (1976-06-01), Kurita et al.
patent: 3999514 (1976-12-01), Abbott et al.
patent: 4058086 (1977-11-01), Jugle et al.
patent: 4093368 (1978-06-01), Nishikawa
patent: 4194465 (1980-03-01), Tsukamoto et al.
patent: 4213617 (1980-07-01), Salger
IBM Technical Disclosure Journal; vol. 22, No. 1, Jun. 1979, pp. 28-29; "Developer's Electromagnetic Gate", by R. A. Daniels.
Xerox Disclosure Journal; vol. 1, No. 4, Apr. 1976, pp. 73-74; "Toner Emission Control Concept" by John T. Bickmore.
George Keith E.
Olympus Optical Company Ltd.
Rubinson G. Z.
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