Thermal magnetic tape duplication method employing a reflex imag

Details Thermal magnetic tape duplication method employing a reflex imag Thermal magnetic tape duplication method employing a reflex imag

1981-03-30

1983-09-06

Tarcza, Thomas H.

Recorders

Magnetographic

Radiation sensitive

430 39, G01D 1512

Patent

active

044032269

ABSTRACT:
This invention is directed to magnetic imaging method comprising creating a latent magnetic image on a reflex imaging member, transferring the latent image by thermoremanent duplication to a durable magnetic imaging member, developing the transferred image on the durable imaging member, and transferring the developed image to a receiving member. In one embodiment the present invention involves an improved magnetic imaging method which comprises (a) erasing and subsequently magnetizing a reflex magnetic imaging member with a D.C. magnetic field at an exposure of at least about 800 gauss in a direction parallel to the preferred axis of the aligned magnetic pigment particles in the magnetic grooves of said imaging member; (b) placing a document to be copied in contact with said imaging member; (c) directing light through said imaging member to said document and back to said imaging member by imagewise reflection from said document to expose the magnetic material in said imaging member and imagewise demagnetize said imaging member; (d) separating said document from said imaging member; (e) placing said imaging member in contact with a durable magnetic recording member; (f) directing light energy on to the rear of said durable magnetic recording member to said reflex imaging member to form a latent magnetic image on said durable magnetic recording member; (g) separating said reflex imaging member from said durable magnetic recording member; (h) contacting said durable magnetic recording member with magnetic toner particles to develop said latent magnetic image on said durable magnetic recording member; and (i) transferring the developed image from said durable magnetic recording member to a receiving member.

REFERENCES:
patent: 3555557 (1971-01-01), Nacci
patent: 3845306 (1974-10-01), Kohlmannsperger
patent: 3987491 (1976-10-01), Nelson
patent: 4068239 (1978-01-01), Nelson

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