Developer material coating apparatus having developer material r

Details Developer material coating apparatus having developer material r Developer material coating apparatus having developer material r

1990-03-29

1992-05-26

Wityshyn, Michael G.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

Electrostatic and/or electromagnetic attraction or...

118638, 118652, 118653, G03G 1506

Patent

active

051157608

ABSTRACT:
A developer material coating apparatus includes a support member feeding unit for feeding the support member to a developer material coating region while carrying the support member thereon, a developer material coating unit for triboelectrically charging the developer material and electrostatically supplying the charged developer material toward the support member feeding unit to coat the developer material on the surface of the support member in the developer material coating region, and a developer material removing unit for sucking and removing the developer material attached to said support member feeding means, except for the developer material attached to the surface of the support member. The developer material removing unit comprises an air nozzle for sucking the developer material attached to the support member feeding unit under a negative pressure, a trap case intercommunicating with the air nozzle for withdrawing the sucked developer material through the air nozzle, an air filter provided in the trap case for trapping the sucked developer material and a negative pressure producing unit intercommunicating with the trap case for producing a negative pressure in said air nozzle to produce an air flow in a predetermined direction.

REFERENCES:
patent: 3645618 (1972-02-01), Lancia et al.
patent: 3690758 (1972-09-01), Knechtel et al.
patent: 3909864 (1975-10-01), Tanaka et al.
patent: 4378728 (1983-04-01), Berkmann
patent: 4797335 (1989-01-01), Hiratsuka et al.

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