Paper machine wet line control
US4500968A · kind A · utility
49Cited by
14References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1982 |
| Grant date | Feb 19, 1985 |
| Priority date | — |
| Expiry date | Jun 29, 2002 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21G9/0027
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A paper machine wet line monitor is provided by photographing the surface of the wire of a paper machine in the area of the wet line (sometimes known as the dry line) with a video camera to generate video signals. The video signals are digitized and define a line corresponding to the wet line of the machine and this line is displayed preferably while also indicating the average location of the wet line across the machine. The processed digitized signal may be imposed on an automatic headbox control to influence this control and maintain the position of the wet line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.