Electrographic development process

Details Electrographic development process Electrographic development process

1976-06-30

1978-10-24

Martin, Jr., Roland E.

Gas separation: apparatus

Magnetic separating means

427 18, 118657, 118658, 96 1R, G03G 1309

Patent

active

041219317

ABSTRACT:
A method using a one-component developer of magnetically attractable, electrically insulating toner particles for developing an electrical potential pattern at a surface. Electrical means and an electrode-developer transport means are provided with the electrode-developer transport means positioned relative to the electrical potential pattern for establishing a unidirectional electrical difference between the potential pattern and an electrically conductive portion provided by the electrode-developer transport means. Rapid turbulent physical mixing action of the toner is provided for producing sufficient repetitive electrical contact of the toner with the electrically conductive portion to cause electrical charge of a predetermined polarity to be injected onto the toner particles. A charge level is so produced, which is sufficient to cause such charged toner particles to be deposited on the potential pattern bearing surface in accordance with the potential pattern.

REFERENCES:
patent: 3645770 (1972-02-01), Flint
patent: 3900001 (1975-08-01), Frazer et al.
patent: 3909258 (1975-09-01), Kotz
IBM Technical Disclosure Bulletin, "Development of Electrostatic Images," R. M. Schaffert, vol. 1, No. 3, Oct., 1958.

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