Method and apparatus for measuring fibre flexibility
US5331405A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1992 |
| Grant date | Jul 19, 1994 |
| Priority date | — |
| Expiry date | Jun 24, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/0057
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for measuring the flexibility of fibers, particularly cellulose fibres, in a flowing suspension. The fibre form of a large number of fibres is registered at two different pictures of suspension flow. A predefined fibre form is calculated for each flow picture, and a relationship, for example the quotient between two measurements of mean fibre form is determined and utilized to define fibre flexibility. The invention also relates to an arrangement for carrying out the inventive method, wherein the arrangement includes a flow-through container (20) through which the suspension flows, a transparent window (26) mounted in the container wall, a CCD-type camera (30) which functions to photograph fibres passing the window, a picture analysis unit (34) coupled to the camera (30), and a data processing unit (36) for processing information obtained from the picture analysis unit (34).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.