Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Magnetic imaging
Patent
1984-02-21
1985-09-03
Goodrow, John L.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Magnetic imaging
430110, 430122, 346 742, G03G 1900
Patent
active
045392803
ABSTRACT:
A method is presented for producing a controlled-distribution, toned magnetic image unit on a planar-like magnetic-image-storage medium having a magnetizable facial expanse using magnetically attractable toner particles having differing sizes. The method includes the steps of creating in such a facial expanse a latent magnetic image formed of magnetic vectors which extend generally parallel with the facial expanse adjacent the perimeter of the image and which extend with increasing angularity with respect to the facial expanse plane with distance inwardly from the perimeter; positioning the image sufficiently close to a mass of such particles to draw the particles magnetically to the latent image; and by said positioning and drawing, selectively capturing particles on the facial expanse extending over the latent image with the sizes of the captured particles generally tending to increase in size with distance inwardly from the perimeter of the image.
REFERENCES:
patent: 4111823 (1978-09-01), Kobayashi et al.
patent: 4323929 (1982-04-01), Nacci
Ferix Corporation
Goodrow John L.
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