Rotary electrical printer and method automatic blackness control for rotary electrical printer
US4177472A · kind A · utility
1Cited by
6References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1978 |
| Grant date | Dec 4, 1979 |
| Priority date | — |
| Expiry date | Mar 22, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D15/08
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The printer records images in the form of dots on electrical discharge-sensitive paper. A plurality of styli are mounted on a rotor. The paper is fed continuously through a curved guide in a direction perpendicular to the plane of rotation of the rotor. This divisional patent is directed to the provision of an automatic blackness control circuit for varying the stylus voltage directly with the rotor speed so that the blackness and readability of the images remains relatively stable despite wide variations in operating speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.