Method for stable electro (stato) graphic reproduction of a continuous tone image
US5825504A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1996 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Sep 30, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G13/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method is provided for reproducing a continuous tone image by imagewise application of toner particles to a substrate comprising the following steps: PA1 partitioning a surface of the substrate in a plurality of disjunctive microdots; PA1 applying to at least one microdot at least two types of toner, having substantially the same chromaticity. Preferentially, for each toner type a large majority of microdots within a region comprising adjacent microdots, is supplied with either a high or low amount of toner, whereas the other microdots are supplied with a medium amount of toner, and more preferentially for at least one toner type the region comprises at least one microdot supplied with a high, another with a low and another with a medium amount of said toner. In a preferred embodiment the minimum number (N) of types of toner particles used in the method of this invention depends on the volume average size of the toner particles used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.