The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 03, 1985
Filed:
Feb. 21, 1984
Gilbert D Springer, Sunnyvale, CA (US);
Ferix Corporation, Fremont, CA (US);
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.