Developing device for xerographic copying machines

Details Developing device for xerographic copying machines Developing device for xerographic copying machines

1978-12-20

1981-01-20

Lawrence, Evan K.

Coating apparatus

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

With means to orient coating particles

118651, 118653, 430103, G03G 1508

Patent

active

042455863

ABSTRACT:
A xerographic developing device for depositing xerographic toner upon an image carrying medium without the use of toner carrier beads which includes an applicator roller for transferring toner from a tray towards the image carrying medium via a scraper element mounted at the exit opening of the tray. Improved regulation of the quantity of toner transferred in this manner is achieved by applying a DC-voltage potential between the applicator roller and the scraper.

REFERENCES:
patent: 3754963 (1973-08-01), Chang
patent: 3990394 (1976-11-01), Katakura
patent: 4089297 (1978-05-01), Morita et al.
patent: 4119060 (1978-10-01), Mochizuki et al.
patent: 4121931 (1978-10-01), Nelson
patent: 4187330 (1980-02-01), Harada et al.

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