Roll film carrier used in reader or reader printer
US4524315A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1982 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Apr 19, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B19/23
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In a roll film carrier for rewinding the roll film wound on a supply reel onto a take-up reel there are provided a signal generating means which detects the rotation of the supply reel shaft and outputs a corresponding signal, a means for generating a pulse synchronously with the passage of the roll film and a means for controlling the driving of the roll film through comparison of the number of pulses generated in the signal generating period of the signal generating means with a predetermined number and it is so arranged that the driving of the roll film is stopped when the number of generated pulses has agreed with the predetermined number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.