Recorders – Printing – dotting – or punching marker – Ink transfer support or moving means
Patent
1988-08-23
1989-11-28
Evans, Arthur G.
Recorders
Printing, dotting, or punching marker
Ink transfer support or moving means
3461531, G01D 1500
Patent
active
048841889
ABSTRACT:
A printing device for reproducing information having movable image-forming element with a dielectric surface. An image-forming station is provided in which a magnetic roller having a rotatable electrically conductive non-magnetic sleeve is disposed near the surface of the image-forming element. An electric field between the image-forming element and the magnetic roller is generated in accordance with an information pattern. An electrically conductive magnetically attractable toner powder is placed in the zone between the magnetic roller and the image-forming element during generating of the electric field. A magnetic field formed in the zone by stationary ferromagnetic knife blade disposed inside the magnetic roller sleeve and the blade is held between like poles of two magnets at an angle of between 70.degree. and 85.degree. to the tangential plane to the sleeve.
REFERENCES:
patent: 4763143 (1988-08-01), Ohbu et al.
patent: 4777494 (1988-10-01), Okuna et al.
Berkhout Ronald
Corver Jozef A. W. M.
Hoep Antoon L.
Knapen Berend J.
van Stiphout Johannes G. V.
Evans Arthur G.
Oce'-Nederland, B.V.
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