Web tension control system
US4015794A · kind A · utility
8Cited by
4References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1975 |
| Grant date | Apr 5, 1977 |
| Priority date | — |
| Expiry date | Sep 15, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H23/063
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In a web tension control system in which web drawn from a variably braked roll passes through a festoon, a selected amount of web is maintained in the festoon by variably braking the roll. The system maintains accurate control of the festoon dancer position over a wide range of web tensions and roll diameters by means of a separate control loop whose output is a relatively slowly changing voltage proportional to the average deviation of the festoon dancer from its selected reference position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.