Process for magnetically transferring a powder image

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

G - Physics

03

G

101/41

G03G 19/00 (2006.01) G03G 15/16 (2006.01)

Patent

CA 1098762

ABSTRACT OF THE DISCLOSURE 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 permamently 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 magne- tizable and possesses a substantially uniform magnetic permea- bility 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.

306915

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