Magnetic brush developing process and developer

Details Magnetic brush developing process and developer Magnetic brush developing process and developer

1990-10-05

1994-05-10

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...

430108, 430111, G03G 1309, G03G 9107

Patent

active

053106172

ABSTRACT:
Disclosed are a two-component type developer which is supplied to an area where a bias voltage of at least 250 V is applied, and a developing process using this developer. In this developer, by adjusting the particle size distribution of carrier particles within a specific range, occurrence of the so-called carrier dragging phenomenon of the transfer of the carrier together with the toner to a photosensitive material can be prevented. This adjustment of the particle size distribution is such that the content of carrier particles having a size smaller than 250 mesh is less than 8% by weight based on the entire carrier particles, the diameter D.sub.50 of the weight average particle size corresponding to 50% of the weight of the entire carrier particles is in the range of from 80 to 120 .mu.m and the difference between D.sub.25 and D.sub.75 is in the range of from 5 to 20 .mu.m.

REFERENCES:
patent: 4592987 (1986-06-01), Mitsuhashi et al.
patent: 4949127 (1990-08-01), Matsuda et al.

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