Method and apparatus for assaying wood pulp fibers
US7537732B2 · kind B2 · utility
4Cited by
12References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2004 |
| Grant date | May 26, 2009 |
| Priority date | — |
| Expiry date | Sep 8, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/25
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Paper pulp is added to a stain solution. The stain solution and pulp fibers are mixed to form a slurry. Samples are removed from the slurry and are admixed with dilution water and a bleach. Then, the fibers are moved into a flow cell where they are subjected to a light source adapted to stimulate fluorescence from the stained pulp fiber. Before the fiber slurry enters the flow cell it is mixed with a dilution water of bleach to reduce background fluorescence. The fluorescent light is collimated and directed through a dichroic filter onto a fluorescence splitting dichroic filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.