Sequential development with magnetic and non-magnetic toner

Details Sequential development with magnetic and non-magnetic toner Sequential development with magnetic and non-magnetic toner

1990-06-28

1991-07-30

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355251, 355328, 430122, G03G 1506

Patent

active

050363620

ABSTRACT:
Electrostatographic reproduction apparatus has two development stations in tandem to first develop a latent image with magnetic toner so that small details, lines, and the edges of solids are developed; and to then develop the remaining undeveloped or underdeveloped portions of the latent image with non-magnetic toner to fill in the inside of the solid areas. Preferably, the magnetic toner development station has a development electrode spaced further from the photoconductor than the electrode of the non-magnetic toner development station.

REFERENCES:
patent: 4509850 (1985-04-01), Weigl
patent: 4572647 (1986-02-01), Bean et al.
patent: 4901114 (1990-02-01), Parker et al.

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