Photocopying – Including fiber optics
Patent
1987-11-03
1989-01-10
Braun, Fred L.
Photocopying
Including fiber optics
222DIG1, G03G 2100
Patent
active
047977043
ABSTRACT:
A development station for a low cost copier or printer has a housing having walls that divide the housing into two separate chambers. The first chamber contains a developer mix including carrier particles and toner. The second chamber holds a supply of toner particles. The second chamber holds a single supply of fresh toner particles that are periodically metered to the first chamber. The second chamber is fully enclosed and sealed so that the supply of toner in the second chamber cannot be replenished. A plate in the second chamber rests on top of the toner supply and urges the toner downwardly in the chamber as the toner supply is delivered to the first chamber. When the toner supply is exhausted, the plate blocks the passageway for toner from the second chamber to the first chamber. Thus, if an opening is formed in the top of the second chamber and a new supply of toner is provided to the chamber through the opening, the plate prevents delivery of the new toner supply to the first chamber. Therefore the plate prevents a new supply of toner that may be incompatible with the carrier particles in the second chamber from being used in the development station.
REFERENCES:
patent: 3539077 (1970-11-01), Drexler et al.
patent: 4089601 (1978-05-01), Navone
patent: 4591258 (1986-05-01), Nishino et al.
patent: 4632534 (1986-12-01), Shimono
patent: 4647180 (1987-03-01), Watanabe
patent: 4660960 (1987-04-01), Fukunaga et al.
patent: 4711561 (1987-12-01), Tsuruoka
Research Disclosure, Item 27259, Dec. 1986.
Hill Lawrence A.
Jacobs Michael E.
Knoll Arthur S.
Williams Ralph E.
Braun Fred L.
Eastman Kodak Company
Treash Leonard W.
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