Process for rapidly charging uncharged toner particles to a...

Details Process for rapidly charging uncharged toner particles to a... Process for rapidly charging uncharged toner particles to a...

G - Physics

03

G

96/215, 96/51

G03G 9/08 (2006.01) G03G 13/08 (2006.01)

Patent

CA 1178103

-1- ABSTRACT OF THE DISCLOSURE This invention relates to a process for rapidly charging uncharg- ed 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 trasnferred 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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