Method and apparatus for controlling the profile of sheet material
US5792319A · kind A · utility
Inventor
Key dates
| Filing date | May 17, 1996 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | May 17, 2016 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F1/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus is disclosed for controlling the flow of stock mixture through an enclosed head box chamber, such as in a paper-making machine, and onto a forming surface thereof. A plurality of plates are arranged in the chamber to extend transversely across the chamber, with the top edges of the plates and the inner wall of the chamber defining therebetween an opening through which the stock mixture flows. The plates are selectively moved toward and away from the inner wall to vary the configuration of the opening and, thus, control the flow of stock mixture through the openings such that selective movement of selected plates controls the cross-sectional flow profile across the width of the chamber and, correspondingly, controls the cross-sectional flow across the width of the outlet from the chamber and onto the surface forming the sheet material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.