Method for measuring and controlling fiber variations in paper sheet
US5393378A · kind A · utility
11Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1993 |
| Grant date | Feb 28, 1995 |
| Priority date | — |
| Expiry date | Mar 2, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30124
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A formation control method and apparatus in which an image is emitted from a light source and transmitted through a predetermined area of paper an captured by a camera to be displayed as transmitted light image on a display of an image processing computing element, the transmitted light image displayed on the display being image-analyzed to obtain formation factor for quantification of the formation, J/W ratio and the like being optimized by fuzzy control using membership functions based on said formation factor so as to improve the formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.