Developer material coating apparatus having coating amount contr

Details Developer material coating apparatus having coating amount contr Developer material coating apparatus having coating amount contr

1990-03-23

1992-06-30

Jones, W. Gary

Coating apparatus

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

Electrostatic and/or electromagnetic attraction or...

118624, 118638, 118651, 118653, G03G 1506

Patent

active

051253577

ABSTRACT:
A developer material coating apparatus for electrostatically coating developer material on each of various kinds of support members having different thicknesses and surface conditions under various environmental conditions such as temperature and humidity in a developer material coating region to form a developer sheet, comprising a support member feeding unit for feeding each of the support members to the developer material coating region at a feeding speed while carrying the support member thereon, a developer material coating unit for triboelectrically charging the developer material while carrying the charged developer material thereon, and electrostatically supplying the charged developer material therefrom to the support member through a gap between the feeding unit and the coating unit to thereby form a developer sheet, and a control unit for controlling an amount of the developer material to be coated on the support member so that the developer material coated on the support member has a predetermined thickness irrespective of the change in the environmental conditions, the thickness of the support member and the kind of the support member.

REFERENCES:
patent: 3837741 (1974-09-01), Spencer
patent: 4878598 (1989-11-01), Ruschhaupt, Jr.
patent: 4957770 (1990-09-01), Howorth

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