Hard copy recorder paper speed control
US4672396A · kind A · utility
2Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1986 |
| Grant date | Jun 9, 1987 |
| Priority date | — |
| Expiry date | Mar 10, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/933
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hard copy recorder is provided in which paper or film is moved along a paper path by a motor-driven roller. A tension-measuring dancer measures paper or film tension. The position of the dancer is sensed by an optical sensor, which produces a signal representative of paper or film tension. The paper or film tension signal is used to selectively couple one signal from a number of sources of predetermined different frequencies to the motor to control its speed in accordance with the sensed paper tension.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.