Method and apparatus for controlling the position of a transported web
US4692819A · kind A · utility
120Cited by
9References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1986 |
| Grant date | Sep 8, 1987 |
| Priority date | — |
| Expiry date | Apr 16, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for controlling the position of a web containing location identifying information thereon. In particular, a means for measuring displacement of the web independent of the location information is employed to measure the displacement of the web in a cyclic manner such that the measuring cycle is in the expected displacement intervals between identifying information. A difference between a desired position of the web determined by an operator controlled reference displacement position of the web is determined, and used for controlling the position of the web to the desired position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.