Method of controlling curl employing inline headbox edge flow control valve
US5833808A · kind A · utility
8Cited by
21References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1997 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Jan 21, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21G9/0009
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The headbox apparatus of this invention contributes to the production of a paper web of uniform fiber orientation by controlling the edge flow of stock into the headbox nozzle through adjustable valves positioned in edge tubes in closed loop with a fiber orientation sensor. At the same time that fiber orientation is being control through adjustable valves position in the edge tube, basis weight of the web being formed is controlled by a stock dilution systems and an adjustable slice lip, in closed loop with a basis weight profiler sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.