Grooved magnetic brush roll

Details Grooved magnetic brush roll Grooved magnetic brush roll

1976-06-30

1977-04-19

Jaudon, Henry S.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With electromagnetic and/or electrostatic removal of...

427 18, G03G 1508

Patent

active

040181871

ABSTRACT:
For use in an electrophotographic copy machine utilizing magnetic brush roll development, an improved hollow magnetic roll made of non-magnetic material containing axially located grooves along the exterior periphery. The grooves are spaced in a range from 15-25 times the diameter of the permeable carrier beads used in the development process and the lands between grooves are polished to a high degree, e.g., 25 .mu. inches. The depth of the grooves is to a minimum of 1-2 times bead diameter while the groove width is to a minimum of 2-3 times bead diameter.

REFERENCES:
patent: 2811465 (1957-10-01), Greig
patent: 3283703 (1966-11-01), Childress et al.
patent: 3674532 (1972-07-01), Morse
patent: 3830199 (1974-08-01), Saito et al.
patent: 3905332 (1975-09-01), Sawada et al.
patent: 3906896 (1975-09-01), Stansell
patent: 3939801 (1976-02-01), Tanaka et al.
patent: 3941084 (1976-03-01), Karita
patent: 3978817 (1976-09-01), Hauser et al.

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