FI900872A - Web forming method in paper or board machines - Google Patents

Web forming method in paper or board machines Download PDF

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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
Application number
FI900872A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI90672C (en
FI900872A0 (en
FI90672B (en
Inventor
Jouni Koskimies
Pekka Pakarinen
Michael Odell
Original Assignee
Valmet Paper Machinery Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valmet Paper Machinery Inc filed Critical Valmet Paper Machinery Inc
Priority to FI900872A priority Critical patent/FI90672C/en
Publication of FI900872A0 publication Critical patent/FI900872A0/en
Publication of FI900872A publication Critical patent/FI900872A/en
Application granted granted Critical
Publication of FI90672B publication Critical patent/FI90672B/en
Publication of FI90672C publication Critical patent/FI90672C/en

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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>
FI900872A 1990-02-21 1990-02-21 Path forming process in paper or cardboard machines FI90672C (en)

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)

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

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BB Publication of examined application
MM Patent lapsed

Owner name: VALMET PAPER MACHINERY INC