Method and apparatus for determining parameters of a staple length distribution of fibers in yarn slivers
US4088016A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1977 |
| Grant date | May 9, 1978 |
| Priority date | — |
| Expiry date | Jul 11, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L5/0076
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Improved method, and apparatus for practicing the method, for determining parameters of a staple length distribution of fibers in a yarn sliver by feeding the yarn sliver to and between two pairs of drafting rolls initially spaced apart at a greater distance than the longest fiber in the yarn sliver and monitoring the drafting force exerted upon the yarn sliver while continuously decreasing the distance between the pairs of drafting rolls and monitoring the distance, and generating signals representative of the drafting force and distance and feeding them, respectively, to the Y-axis and X-axis of a X-Y recorder and drawing a curve therefrom from which the desired parameters can be determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.