Paper basis weight detector
US5118940A · kind A · utility
5Cited by
3References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1991 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Feb 25, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N23/083
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for continuously determining the basis weight of paper simultaneously at multiple points across the full width of a substrate. The apparatus includes a radioactive source which extends across one side of the web of paper. A detector array, on the opposite side of the substrate, detects the emission from the source. The array includes scintillating fibers and multi- or single-anode photomultipliers which may be connected by a scintillating or non-scintillating fiber optic elements to the photomultiplier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.