Screened donor for touchdown development

Details Screened donor for touchdown development Screened donor for touchdown development

1983-11-07

1985-12-03

Goodrow, John L.

Coating apparatus

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

Electrostatic and/or electromagnetic attraction or...

118650, 118653, G03G 1508

Patent

active

045560137

ABSTRACT:
A touchdown development system includes a donor roll for positioning adjacent a photosensitive member in order to develop an image on the surface of the photosensitive member. A "C-shell" toner housing is positioned around the donor roll to extend from the 6 o'clock to 9 o'clock position and filled with single component toner and about 1% aerosil. A stationary and open mesh screen is placed adjacent the donor roll so that a dense, uniform layer of well charged toner is formed on the donor roll for transfer to the photosensitive member surface. The screen leaves contact with the donor roll at a distance above the top of toner bath to thereby remove any excess toner from the donor roll surface.

REFERENCES:
patent: 2576047 (1951-11-01), Schaffert
patent: 3038442 (1962-06-01), Jones et al.
patent: 3203394 (1965-08-01), Hope et al.
patent: 3470009 (1969-09-01), Gundlach
patent: 3739748 (1973-06-01), Rittler et al.
patent: 3790397 (1974-02-01), Weiler
patent: 3799113 (1974-03-01), Whited
patent: 3998185 (1976-12-01), Weiler
patent: 4011834 (1977-03-01), Stephan
patent: 4144061 (1979-03-01), Bean

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