Method and apparatus for recording information on a recording surface
US3992712A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 1974 |
| Grant date | Nov 16, 1976 |
| Priority date | — |
| Expiry date | Jul 3, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A plurality of magnetic liquid streams is simultaneously excited to produce a plurality of streams of magnetic droplets of substantially uniform spacing and substantially uniform velocity. Each of the droplets in each of the streams passes over a separate selector for each stream to determine whether the droplet will be utilized for printing on a paper. A predetermined number of the droplets of each of the streams is subjected to a time periodic deflection to cause a first half of the predetermined number of droplets, which have been selected for printing by the selectors, to engage a paper in a first line and a second half to engage the paper in a second line. A ramp voltage deflection is separately applied to the predetermined number of droplets of each stream subjected to each half of the time periodic deflection to cause the print lines of the droplets to be orthogonal to the direction of movement of the paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.