Method for creating magnetic toner images having controlled toner distribution
US4539280A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1984 |
| Grant date | Sep 3, 1985 |
| Priority date | — |
| Expiry date | Feb 21, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G19/00
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.