Process for magnetically transferring a powder image

Details Process for magnetically transferring a powder image Process for magnetically transferring a powder image

1979-06-18

1981-03-03

Pianalto, Bernard D.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

427 141, 427 47, B05D 104, B05D 106, B05D 500

Patent

active

042542065

ABSTRACT:
Transfer of a powder image from a material carrying the image, such as a photoconductive material utilized for indirect electrophotographic copying, is effected magnetically by employing permanently magnetizable developing powder for forming the image, magnetizing the powder image, and bringing the powder image into contact with a first receiving support made of soft magnetic material so that this support is magnetizable and possesses a substantially uniform magnetic permeability over its whole surface but becomes magnetized so weakly that the powder image after being transferred to the first receiving support can be transferred readily from it, directly or indirectly, to a final receiving support which may be plain copy paper. The magnetizable material of the first receiving support has a coercive force of less than about 90 Oersteds and a relative magnetic permeability of at least 2.

REFERENCES:
patent: 3250636 (1966-05-01), Willferth
patent: 4051484 (1977-09-01), Martin

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