Polyvinyl acetal coated carrier particles for magnetic brush cle

Details Polyvinyl acetal coated carrier particles for magnetic brush cle Polyvinyl acetal coated carrier particles for magnetic brush cle

1980-05-13

1982-10-26

Rubinson, G. Z.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

430108, G03G 2100

Patent

active

043558860

ABSTRACT:
An electrostatographic development and cleaning system employing electrically insulating carrier particles. The carrier particles comprise a core having magnetic or magnetically-attractable properties which is coated with a polyvinyl acetal. The coated carrier particles have negative triboelectric charging properties and are particularly useful in development systems employing negatively charged photoconductive surfaces. The carrier particles provide efficient removal of residual toner deposits from a photoreceptor surface after a copying operation.

REFERENCES:
patent: 2911330 (1959-11-01), Clark
patent: 3507686 (1970-04-01), Hagenbach
patent: 3918808 (1975-11-01), Narita
patent: 4006987 (1977-02-01), Tomono et al.
patent: 4116555 (1978-09-01), Young et al.
patent: 4125667 (1978-11-01), Jones
patent: 4127327 (1978-11-01), Rezanka
patent: 4272184 (1981-06-01), Rezanka
patent: 4279499 (1981-07-01), Rezanka et al.

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