Process for positive charge sharing toner compositions

Details Process for positive charge sharing toner compositions Process for positive charge sharing toner compositions

1981-08-26

1984-01-17

Martin, Jr., Roland E.

Radiation imagery chemistry: process, composition, or product th

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

Process of making developer composition

4301066, 430109, 430111, G03G 2100

Patent

active

044264364

ABSTRACT:
This invention relates to a process for rapidly charging uncharged toner particles to a positive polarity, which comprises adding uncharged toner particles to a positively charged developer composition comprising carrier particles and toner particles, the charged and uncharged toner particles containing conductive particles or conductive patches on their surface, which conductive patches are of a higher positive triboelectric charge than the toner polymer, contacting the charged toner particles with the uncharged toner particles causing positive charges to be transferred from the conductive particles on the charged toner particles, to conductive particles on the uncharged toner particles, within a period of from about 5 seconds to about 2 minutes, thereby resulting in substantially the same level of positive charge intensity for both the original charged toner particles and the added toner particles, such charge intensity ranging from about 5 microcoulombs per gram to about 50 microcoulombs per gram.

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IBM Tech. Discl. Bull., vol. 21, No. 8, Jan. 1979, p. 3091, "Anti-Caking Agent for Toner".
Res. Discl. 9502, Prod. Lic. Index, Mar. 1972, pp. 32-35, "Toner Concentration Control Apparatus".

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