Torque measuring and transmitting system for a web spooling mechanism
US4942343A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1988 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Aug 11, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L3/1435
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A web spooling mechanism has a chuck that is coupled to a spool for rotating the spool to wind a length of web material onto the spool. Torque is transmitted from a drive shaft to the chuck through a spring coupled to the shaft and the chuck. A transducer measures the angular relationship between the shaft and the chuck throughout a range of relative angular positions therebetween. The transducer provides a signal indicative of that angular relationship, and the signal is transmitted to a controller that regulates the torque applied by the drive shaft. The position of the chuck relative to the drive shaft during web winding operation is a function of tension transients in the web. Since the system adjusts the torque of the drive shaft as a function of the angular relationship of the chuck and drive shaft, the system is effective to reduce tension transients in the web being wound onto the spool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.