Method for producing multilayer paper
US4436587A · kind A · utility
14Cited by
2References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 23, 1982 |
| Grant date | Mar 13, 1984 |
| Priority date | — |
| Expiry date | Feb 23, 2002 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F9/006
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Multilayer paper of superior layer purity and formation is produced by discharging a plurality of superimposed jets of papermaking stock from a headbox into the throat of a roll former, preventing the discharged jets from coming together for a short distance by introducing air between adjacent jets as they leave the headbox, and maintaining the velocity of the jet closest to a plain forming roll in the roll former slightly higher than the velocity of an adjacent discharged jet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.