Process for preparing electrophotographic imaging member

Details Process for preparing electrophotographic imaging member Process for preparing electrophotographic imaging member

1999-09-29

2000-04-11

Goodrow, John

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Process of making radiation-sensitive product

430129, G03G 5043

Patent

active

060486589

ABSTRACT:
A process for fabricating electrophotographic imaging members comprising providing a substrate with an exposed surface, simultaneously applying, from a coating die, two wet coatings to the surface, the wet coatings comprising a first coating in contact with the surface, the first coating comprising photoconductive particles dispersed in a solution of a film forming binder and a predetermined amount of solvent for the binder and a second coating in contact with the first coating, the second coating comprising a solution of a charge transporting small molecule and a film forming binder dissolved in a predetermined amount of solvent for the transport molecule and the binder, drying the two wet coatings to remove substantially all of the solvents to form a dry first coating having a thickness between about 0.1 micrometer and about 10 micrometers and dry second coating having a thickness between about 4 micrometers and 20 micrometers, applying at least a third coating in contact with the second coating, the third coating comprising a solution containing having a charge transporting small molecule, film forming binder and solvent substantially identical to charge transporting small molecule, film forming binder and solvent in the second coating, and drying the third coating to from a dry third coating having a thickness between about 13 micrometers and 20 micrometers.

REFERENCES:
patent: 4521457 (1985-06-01), Russell et al.
patent: 5213937 (1993-05-01), Miyake
patent: 5476740 (1995-12-01), Markovics et al.
patent: 5614260 (1997-03-01), Darcy
patent: 5830614 (1998-11-01), Pai et al.
patent: 5981125 (1999-11-01), Itami

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