Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1993-07-12
1994-11-01
McCamish, Marion E.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
4301066, 430108, 430109, G03G 9113
Patent
active
053606906
ABSTRACT:
A two-component developer comprising a magnetic carrier having a carbon black-containing resin-coating layer and a toner composed of a carbon black-containing resin composition is disclosed. A styrene resin, an acrylic resin or a styrene-acrylic copolymer resin is selected as each of the carrier-coating resin and the toner-forming resin, and the carbon black content A in the carrier-coating layer and the carbon black content B in the toner-forming layer satisfy requirements represented by the following formulae: ##STR1## Namely, by adjusting the carbon black contents A and B within specific ranges relatively to each other, a two-component developer which is well-balanced between the frictional chargeability characteristic and the electric resistance is provided.
REFERENCES:
patent: 4517268 (1985-05-01), Gruber et al.
patent: 4912005 (1990-03-01), Goodman et al.
patent: 5093201 (1992-03-01), Ohtani et al.
Inoue Masahide
Nakano Tetsuya
Shimizu Yoshitake
Tamori Mikiko
Tsuyama Kouichi
Ashton Rosemary
McCamish Marion E.
Mita Industrial Co. Ltd.
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