FI900872A - Web forming method in paper or board machines - Google Patents
Web forming method in paper or board machines Download PDFInfo
- Publication number
- FI900872A FI900872A FI900872A FI900872A FI900872A FI 900872 A FI900872 A FI 900872A FI 900872 A FI900872 A FI 900872A FI 900872 A FI900872 A FI 900872A FI 900872 A FI900872 A FI 900872A
- Authority
- FI
- Finland
- Prior art keywords
- velocity
- web
- forming
- lip channel
- paper
- Prior art date
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- Paper (AREA)
Abstract
The invention concerns a web forming method for paper or cardboard machines in which method a pulp suspension stream J is fed through the lip channel 15 in the headbox of the paper machine to the forming wire or forming gap G that is bounded by forming wires 11, 13. A crossdirected velocity v is generated in the pulp suspension stream in the lip channel 15, 15a, 15b of the headbox by feeding more pulp suspension to the one edge region of lip channel 15, 15a, 15b than to the opposite edge region so that the average value of the edge flows essentially corresponds to the average flow in the lip channel. With this cross-directed velocity v together with the uneven distribution δU = SxW = F(Z) (S = velocity in the pulp stream and W = velocity on the wire in the forming region) in the velocity difference that prevails in the Z direction of the web being formed fiber orientation of the web being formed is influenced so that the web fibers are made to turn from the machine direction to the cross direction. <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI900872A FI90672C (en) | 1990-02-21 | 1990-02-21 | Path forming process in paper or cardboard machines |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI900872A FI90672C (en) | 1990-02-21 | 1990-02-21 | Path forming process in paper or cardboard machines |
FI900872 | 1990-02-21 |
Publications (4)
Publication Number | Publication Date |
---|---|
FI900872A0 FI900872A0 (en) | 1990-02-21 |
FI900872A true FI900872A (en) | 1991-08-22 |
FI90672B FI90672B (en) | 1993-11-30 |
FI90672C FI90672C (en) | 1994-03-10 |
Family
ID=8529920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI900872A FI90672C (en) | 1990-02-21 | 1990-02-21 | Path forming process in paper or cardboard machines |
Country Status (1)
Country | Link |
---|---|
FI (1) | FI90672C (en) |
-
1990
- 1990-02-21 FI FI900872A patent/FI90672C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FI90672C (en) | 1994-03-10 |
FI900872A0 (en) | 1990-02-21 |
FI90672B (en) | 1993-11-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
BB | Publication of examined application | ||
MM | Patent lapsed |
Owner name: VALMET PAPER MACHINERY INC |