Measurement of the properties of a web in paper production
US4939929A · kind A · utility
13Cited by
12References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 8, 1988 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Dec 8, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N23/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Variations in the properties of a continuously running web are measured by reciprocating the scanning device across the web. The movement of the scanning device is so time controlled that this movement is out of phase with the variation in the paper properties in the machine direction of the web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.