EP0371786A3 - Web forming method and apparatus - Google Patents

Web forming method and apparatus Download PDF

Info

Publication number
EP0371786A3
EP0371786A3 EP19890312431 EP89312431A EP0371786A3 EP 0371786 A3 EP0371786 A3 EP 0371786A3 EP 19890312431 EP19890312431 EP 19890312431 EP 89312431 A EP89312431 A EP 89312431A EP 0371786 A3 EP0371786 A3 EP 0371786A3
Authority
EP
European Patent Office
Prior art keywords
wire loop
web
stages
zone
wire
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP19890312431
Other languages
German (de)
French (fr)
Other versions
EP0371786A2 (en
Inventor
Tapio Waris
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valmet Technologies Oy
Original Assignee
Valmet Ahlstrom Oy
Valmet Karhula 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 Ahlstrom Oy, Valmet Karhula Inc filed Critical Valmet Ahlstrom Oy
Publication of EP0371786A2 publication Critical patent/EP0371786A2/en
Publication of EP0371786A3 publication Critical patent/EP0371786A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/48—Suction apparatus
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type

Landscapes

  • Paper (AREA)

Abstract

A method for forming a paper or paperboard web from a fibrous material in the wire section of a paper making machine or equivalent machine comprising a bottom wire loop (2;102) with the main portion of its top run being horizontal or substantially horizontal, and a top wire loop (10;110) working in conjunction with the bottom wire loop; wherein in the method fibre slurry coming out of the headbox (1;101) of the paper making machine is fed to the first part (2a; 102a) of the top run of said bottom wire loop (2;102), which forms the first dewatering zone after which the partly formed fibre layer is led to the second dewatering zone, in the area of which said top wire loop (10;110) moves to cover said partly formed fibre layer in such a way that water removal from the fibre layer continues it least in two stages in the area of said second dewaterlng zone, whereupon the top wire loop (10;110) is separated from the nearly formed web (W) that is led to follow the run of the bottom wire loop (2;102) forward to the next processing stages of the web (W), wherein the method is characterized in that in the single-wired dewatering zone (2a;102a), after the initial water removal is carried out through the bottom wire (2;102), water removal through the bottom wire (2;102) is prevented by means of an element group (9; 109) operating in contact with the inner surface of the horizontal top run of the bottom wires; that in said water-removal pre­ vention area water is removed from the web (W) through the top wire in the first stage or stages of the double-­ wired second dewatering zone, which stages comprise a relatively long, planar wire table extending from the headbox to the forming roll (6 in Fig. 1), or from the headbox to the last supporting element (109 in Fig. 2); and that after the first dewatering stage or stages of the double-wired zone water is removed in a curved double-­ wired dewatering zone (b) (Fig. 1) or zones (Ro, C) (Fig. 2), after which the web (W) is led to follow the bottom wire (2;102).
EP19890312431 1988-12-01 1989-11-29 Web forming method and apparatus Withdrawn EP0371786A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI885606 1988-12-01
FI885606A FI885606A (en) 1988-12-01 1988-12-01 BANFORMNINGSFOERFARANDE OCH ANORDNING.

Publications (2)

Publication Number Publication Date
EP0371786A2 EP0371786A2 (en) 1990-06-06
EP0371786A3 true EP0371786A3 (en) 1990-11-22

Family

ID=8527498

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890312431 Withdrawn EP0371786A3 (en) 1988-12-01 1989-11-29 Web forming method and apparatus

Country Status (6)

Country Link
EP (1) EP0371786A3 (en)
JP (1) JPH02191792A (en)
KR (1) KR900010147A (en)
CN (1) CN1045828A (en)
CA (1) CA2004123A1 (en)
FI (1) FI885606A (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3823966C2 (en) * 1988-07-15 1995-03-16 Voith Gmbh J M Device for guiding the screens of a twin-wire section of a paper or board machine
DE4026953C2 (en) * 1990-01-26 1995-11-30 Escher Wyss Gmbh Dewatering device and method for dewatering on a twin wire former
FI91788C (en) * 1990-09-12 1994-08-10 Valmet Paper Machinery Inc Path forming section with double wire in a paper machine
FI93032C (en) * 1991-03-15 1995-02-10 Valmet Paper Machinery Inc Two-wire web forming section of a paper machine
FI90673C (en) * 1991-06-26 1994-03-10 Valmet Paper Machinery Inc Path forming section with double wire in a paper machine
US5202000A (en) * 1991-09-30 1993-04-13 Beloit Technologies, Inc. Saveall apparatus for a twin-wire former
DE4141607C2 (en) * 1991-12-17 1996-04-25 Voith Gmbh J M Twin wire former
US5573643A (en) * 1992-01-17 1996-11-12 Valmet Corporation Twin wire web former in a paper machine
DE4219292A1 (en) * 1992-06-12 1993-12-16 Escher Wyss Gmbh Twin wire former
DE9212448U1 (en) * 1992-09-16 1992-11-05 J.M. Voith Gmbh, 7920 Heidenheim Double wire former with locally adjustable drainage bar
FI103995B1 (en) * 1993-06-17 1999-10-29 Valmet Paper Machinery Inc Method and apparatus and adjustment arrangement in a paper machine for controlling the transverse profile of a paper web
GB9321401D0 (en) * 1993-10-16 1993-12-08 Beloit Walmsley Ltd A forming apparatus for forming a web from stock
AT402517B (en) * 1995-11-10 1997-06-25 Andritz Patentverwaltung DEVICE FOR DRAINING SOLID-LIQUID SUSPENSIONS, IN PARTICULAR CELLULAR SUSPENSIONS
FI110702B (en) * 1996-09-06 2003-03-14 Metso Paper Inc Method and arrangement in the forming section of the web to prevent rewetting of the web
DE50014738D1 (en) * 2000-01-14 2007-12-06 Voith Patent Gmbh Press arrangement
DE20000599U1 (en) * 2000-01-14 2000-05-11 Voith Sulzer Papiertechnik Patent GmbH, 89522 Heidenheim Water drainage device
DE102004000068A1 (en) * 2004-12-30 2006-07-13 Voith Paper Patent Gmbh Dewatering device of a twin-wire former of a machine for producing a fibrous web
DE102005038424A1 (en) * 2005-08-12 2007-02-15 Voith Patent Gmbh Process for producing a fibrous web and twin-wire former for carrying out the process
SE535614C2 (en) * 2010-12-22 2012-10-16 Metso Paper Sweden Ab Method and apparatus for improving dewatering in a double-wire press
FI125522B (en) * 2014-04-15 2015-11-13 Spinnova Oy Method and apparatus for making a fiber yarn
CN107747250B (en) * 2017-11-16 2019-05-03 浙江华宇纸业有限公司 A kind of wet end system of paper machine
CN110172853B (en) * 2019-06-05 2020-10-09 东阳温宾电子科技有限公司 Rotary jet water-saving mechanism for cleaning forming net of paper machine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2808939A1 (en) * 1978-03-02 1979-09-06 Voith Gmbh J M Paper making machine with two convergent endless belts - has outer belt provided along curved passage with suction chamber preventing relative transverse motion
FR2510153A1 (en) * 1981-07-22 1983-01-28 Feldmuehle Ag PAPER MACHINE WITH CANVAS GUIDING ARCHED IN ITS WET AREA
WO1983003109A1 (en) * 1982-03-02 1983-09-15 Oy Valmet Web-forming section of a paper machine
DE3315023A1 (en) * 1982-04-30 1983-11-10 Valmet Oy, 00130 Helsinki FORM SHOE FOR THE SHAPER OF A PAPER MACHINE
DE3329833A1 (en) * 1982-08-23 1984-03-01 A. Ahlström Oy, 29600 Noormarkku DEVICE FOR INFLUENCING A RAILWAY DRAINED ON A SCREEN
EP0136000A2 (en) * 1983-07-23 1985-04-03 Beloit Walmsley Limited Paper-forming machine
WO1989004397A1 (en) * 1987-10-30 1989-05-18 Sulzer-Escher Wyss Gmbh Double-screen format

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2808939A1 (en) * 1978-03-02 1979-09-06 Voith Gmbh J M Paper making machine with two convergent endless belts - has outer belt provided along curved passage with suction chamber preventing relative transverse motion
FR2510153A1 (en) * 1981-07-22 1983-01-28 Feldmuehle Ag PAPER MACHINE WITH CANVAS GUIDING ARCHED IN ITS WET AREA
WO1983003109A1 (en) * 1982-03-02 1983-09-15 Oy Valmet Web-forming section of a paper machine
DE3315023A1 (en) * 1982-04-30 1983-11-10 Valmet Oy, 00130 Helsinki FORM SHOE FOR THE SHAPER OF A PAPER MACHINE
DE3329833A1 (en) * 1982-08-23 1984-03-01 A. Ahlström Oy, 29600 Noormarkku DEVICE FOR INFLUENCING A RAILWAY DRAINED ON A SCREEN
EP0136000A2 (en) * 1983-07-23 1985-04-03 Beloit Walmsley Limited Paper-forming machine
WO1989004397A1 (en) * 1987-10-30 1989-05-18 Sulzer-Escher Wyss Gmbh Double-screen format

Also Published As

Publication number Publication date
CN1045828A (en) 1990-10-03
KR900010147A (en) 1990-07-06
EP0371786A2 (en) 1990-06-06
JPH02191792A (en) 1990-07-27
FI885606A0 (en) 1988-12-01
FI885606A (en) 1990-06-02
CA2004123A1 (en) 1990-06-01

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