Method for resisting formation of undulations in a fiber/water mixture during forming of a paper web in a paper-making machine
US4892622A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 20, 1987 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Aug 20, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F1/009
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of and arrangement for resisting formation of undulations in a fiber/water mixture supplied onto a forming wire at an open planar wire section of a paper-making machine include establishing over the wire an air curtain extending over the full breadth thereof, in the region of which the air mass upon the wire is set in motion. The direction of movement of the air mass is the same as the traveling direction of the wire, and the velocity of the air substantially equals the speed of the wire. The air curtain commences on the planar wire section, in the machine direction, only at a given distance from a lip slice of a headbox of the machine, and the air curtain extends along the traveling direction of the web over the planar wire section over a given distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.