Method for producing a latent electric charge pattern and a device for performing the method
US5036341A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1990 |
| Grant date | Jul 30, 1991 |
| Priority date | — |
| Expiry date | Jun 7, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2217/0025
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention refers to a method for producing a latent electric charge pattern of electric signals and development thereof on an information carrier by means of pigment particles. The information carrier (3) is brought in electric cooperation with at least one screen- or lattice-shaped matrix, preferably an electrode matrix (4, 5, 6) which by way of control opens and closes passages through the matrix in accordance with the configuration of the desired pattern, by means of galvanic connection thereof to at least one voltage source, and that through the passages thus opened is exposed an electric field for attraction of the pigment particles against the information carrier. The invention also relates to a device for performing the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.