Printing machine
US5021810A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 25, 1990 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Jun 25, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2217/0033
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A printing machine according to the present invention, comprises electrically conductive and magnetically inductive printing toner, an array of electrode-needles contacting with toner, each of the electrode-needles arranged apart from the adjacent electrode-needles in the array and individually energized in accordance with a desired printing pattern to electrify the toner communicating electrically with the energized electrode-needle, recording means including an electrically conductive portion and an insulating surface which extends on the electrically conductive portion and is arranged away from the array of electrode-needles to face thereto and to contact with the toner arranged between the electrode-needles and the insulating surface, the voltage applied to the electrically conductive portion being positive when the voltage applied to the energized electrode-needles is negative or the voltage applied to the electrically conductive portion being negative when the voltage applied to the energized electrode-needles is positive so that the toner electrified by the energized electrode-needle is attracted and attached to the insulating surface by the electrically conductive portion, …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.