Development system

Details Development system Development system

1988-08-04

1990-01-02

Grimley, Arthur T.

Photocopying

Contact printing

Light boxes

355251, 118657, G03G 1509

Patent

active

048916730

ABSTRACT:
An apparatus which develops an electrostatic latent image recorded on a photoconductive member used in an electrophotographic printing machine. The apparatus employs a developer material which ages during the life of the electrophotographic printing machine. Carrier granules are added to the developer material to extend the life of the developer material. When the quantity of developer material exceeds a predetermined quantity, developer material exits therefrom through an exit port. A magnetic flux field is generated in the region of the exit port to form a carrier bead curtain which prevents the passage of toner particles therethrough while permitting developer material and carrier granules to exit therefrom.

REFERENCES:
patent: 4101211 (1978-07-01), Rayson
patent: 4387982 (1983-06-01), Stanley
patent: 4394086 (1983-07-01), Hoffman
patent: 4614165 (1986-09-01), Folkins et al.
patent: 4697914 (1987-10-01), Hauser

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