Electrophotography – Internal machine environment – Forced air circulation
Patent
1998-10-30
1999-11-30
Royer, William
Electrophotography
Internal machine environment
Forced air circulation
399 99, G03G 2120
Patent
active
059957808
ABSTRACT:
An electrostatic filtering system which allows a steady flow of air into a development housing and prevent toner emission therefrom. The system is used in an apparatus for developing a latent image recorded on a surface includes the housing having a supply of toner therein; a donor member arranged in the housing to transport toner to a development zone adjacent the surface; and electrode for detaching toner from the donor member and produce a toner cloud in the development zone; and an air handling system, associated with the housing, for generating a negative air stream in the housing, the air handling system including the electrostatic filtering system for removing the toner from the negative air stream. The electrostatic filtering system includes a baffle mounted in the housing in the negative air stream and a high voltage DC for applying a bias to the baffle thereby creating an electrostatic field between the baffle and the developer for collecting toner emission.
REFERENCES:
patent: 4868600 (1989-09-01), Hays et al.
patent: 5028959 (1991-07-01), Gooray
patent: 5146279 (1992-09-01), Seyfried
patent: 5433772 (1995-07-01), Sikora
patent: 5779764 (1998-07-01), Gillen et al.
Bean Lloyd F.
Noe William A.
Royer William
Xerox Corporation
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