US3824152A - Twin wire paper forming with one wire wrapping a suction cylinder - Google Patents

Twin wire paper forming with one wire wrapping a suction cylinder Download PDF

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Publication number
US3824152A
US3824152A US00343401A US34340173A US3824152A US 3824152 A US3824152 A US 3824152A US 00343401 A US00343401 A US 00343401A US 34340173 A US34340173 A US 34340173A US 3824152 A US3824152 A US 3824152A
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US
United States
Prior art keywords
wire
suction cylinder
suction
web
cylinder
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.)
Expired - Lifetime
Application number
US00343401A
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English (en)
Inventor
P Nevalainen
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.)
Ahlstrom Corp
Original Assignee
Ahlstrom Corp
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 Ahlstrom Corp filed Critical Ahlstrom Corp
Application granted granted Critical
Publication of US3824152A publication Critical patent/US3824152A/en
Anticipated expiration legal-status Critical
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Classifications

    • 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

Definitions

  • An endless felt is supported to wrap around the suctiomcylinder insconjunction with" the first wire downstream'of thesecond wire-to press and dewater the web.
  • At least OHETSUCIIOIIIJOX is positioned adjacent the second wireupstream pfthesuctioncylinder, and a pressing mat employed in conjunction with a pressure box may be provided adjacent the suction cylinder for applying pres sure, to'tthe'gfelt as r it Twraps the suction cylinder.
  • the presentsinvention relates to an apparatus for forming a fiber web and-including asuction cylinder provided oneor more suction Zones toremove water from the fiber-web "and -Wiresor similar supporting means for the web running through the apparatus.
  • wires are especially advantageous when the intention is to quickly remove great amounts of water from the web, because the wire will not be clogged by the fibers and the filler removed along with the water.
  • the outer wire has been pressed against the fiber web between the wires by fitting pressing rollers against that surface of the outer wire which faces away from the web.
  • Such apparatuses for forming fiber web are also known in which one of the wires has been replaced by a felt. If the inner wire surrounding the suction cylinder is replaced by a felt, the felt is quickly clogged and removal of water into the suction cylinder becomes difficult or ceases completely, and if the outer wire is replaced by a felt, two-sided removal of water, which is important United States Patent 0 3,824,152 Patented July 16, 1974 for web formation, is no longer possible because the outer felt is quickly clogged by the relatively large amounts of water removed through it at the initial stage of the web formation.
  • the present invention provides an apparatus of the character once described, comprising an endless first wire running over the suction zones of the suction cylinder to prevent the fibers from being sucked into the cylinder, a second endless wire running along part of the suction cylinder and constituting together with said first wire a forming zone for the fiber web, and an endless felt running along part of the suction cylinder and constituting together with the first wire a pressing zone for the fiber web, said pressing zone following immediately after the forming zone.
  • the problems connected with wires and felts have thus been solved according to the invention by dividing the outer supporting means into two parts, the first of which is an endless wire and the other one an endless felt.
  • the fiber web is pressed with the help of the felt against the endless wire which surrounds the suction cylinder, in which case that side of the fiber Web which faces the felt still remains relatively even.
  • Removal of water is especially effective when suction boxes removing water in a direction opposite to that of the suction cylinder are fitted on that side of the outer wire which faces away from the fiber web and at a point before the suction cylinder. Two-sided removal of water, so important for web formation, is thereby obtained.
  • pressing means can be fitted inside the felt loop to press the felt against the fiber web.
  • the removal of water takes BRIEF DESCRIPTION OF THE DRAWING
  • the enclosed drawing shows a schematic side view of a specific embodiment of the invention.
  • numbers 1 and 2 indicate endless wires
  • 3 a head box
  • 4 a suction cylinder with suction zones I, II, and III
  • 5 refers to a pressing roller combination which forms a so-called extended nip with suction cylinder 4.
  • Number 7 refers to a turning roller (suction) which together with roller 8 forms a first press.
  • Numbers 9, 10, and 11 indicate the guide rollers of wire 1
  • number 12 indicates the endless felt
  • 13, 14 the pressing rollers;
  • 15 and 16 are waterremoving boxes which are provided with transversal lists to support the wire and can work with suction.
  • the jets emerging from the lip opening of the head box are fed onto wire 1, where the removal of water takes place through the box 15.
  • the direction of the wire in the area between guide rollers 9 and 10 can be horizontal or tilting downwards, as shown in the figure.
  • the head box may feed the fiber suspension into the convergent space between wires 1 and 2, in which case the guide roller is positioned in the immediate vicinity of the lip. That part of the wire which is between guide rollers 17 and 10 is unsupported but has been tightened so that it can adapt according to the pressure created in the space between the wires.
  • zone III At the beginning of zone III the felt 12 is guided onto the cylinder and runs along the cylinder surface to the end of the zone.
  • the removal of water in zone III can be made more effective with a pressing roller combination and 6.
  • the wire 2 which surrounds the cylinder is detached from the web, and clinging to the felt and supported thereby, the web 21 runs to the pressing nip formed by pressing rollers 13 and 14.
  • the water removal zones of the cylinder are preferably situated so that zone I begins at position 34 oclock and zone III ends at position 11-12 oclock, whereby the gravity and the pressure work in the same direction.
  • An apparatus according to the invention can be used for forming paper, carton, cellulose, and other fiber webs and for removing water from them.
  • the apparatus operaates very smoothly because the fiber web is not left exposed as in most known apparatuses.
  • the improvementaccording towclaim 2 including two suction boxes at theside of the second wire opposite the fiber web, the first suction box being positioned upstream the nip point at which the first and second 'wires meet with the pulp therebetween, and the secondsuction' rollers, and a pressurized box arranged to press said mat against the endless felt.

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  • Paper (AREA)
  • Nonwoven Fabrics (AREA)
US00343401A 1972-03-24 1973-03-21 Twin wire paper forming with one wire wrapping a suction cylinder Expired - Lifetime US3824152A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI720832A FI51228C (fi) 1972-03-24 1972-03-24 Laite kuituradan muodostamiseksi.

Publications (1)

Publication Number Publication Date
US3824152A true US3824152A (en) 1974-07-16

Family

ID=8504719

Family Applications (1)

Application Number Title Priority Date Filing Date
US00343401A Expired - Lifetime US3824152A (en) 1972-03-24 1973-03-21 Twin wire paper forming with one wire wrapping a suction cylinder

Country Status (3)

Country Link
US (1) US3824152A (enrdf_load_html_response)
FI (1) FI51228C (enrdf_load_html_response)
SE (1) SE396423B (enrdf_load_html_response)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2534290A1 (de) * 1965-08-14 1976-02-26 Valmet Oy Doppelsiebformer in einer papiermaschine
US4923568A (en) * 1987-07-09 1990-05-08 Oy Tampella Ab Dewatering zone in a papermachine
US5034100A (en) * 1990-11-28 1991-07-23 Wilbanks International Stationary drainage device with pressure roll
US5060378A (en) * 1989-12-15 1991-10-29 Labounty Manufacturing, Inc. Demolition tool for a hydraulic excavator
US5580423A (en) * 1993-12-20 1996-12-03 The Procter & Gamble Company Wet pressed paper web and method of making the same
US5776307A (en) * 1993-12-20 1998-07-07 The Procter & Gamble Company Method of making wet pressed tissue paper with felts having selected permeabilities
US5795440A (en) * 1993-12-20 1998-08-18 The Procter & Gamble Company Method of making wet pressed tissue paper
US5830316A (en) * 1997-05-16 1998-11-03 The Procter & Gamble Company Method of wet pressing tissue paper with three felt layers
US5855739A (en) * 1993-12-20 1999-01-05 The Procter & Gamble Co. Pressed paper web and method of making the same
US5861082A (en) * 1993-12-20 1999-01-19 The Procter & Gamble Company Wet pressed paper web and method of making the same
US5897745A (en) * 1994-06-29 1999-04-27 The Procter & Gamble Company Method of wet pressing tissue paper
US6103062A (en) * 1998-10-01 2000-08-15 The Procter & Gamble Company Method of wet pressing tissue paper

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2534290A1 (de) * 1965-08-14 1976-02-26 Valmet Oy Doppelsiebformer in einer papiermaschine
US4923568A (en) * 1987-07-09 1990-05-08 Oy Tampella Ab Dewatering zone in a papermachine
USRE35432E (en) * 1989-12-15 1997-01-28 Labounty Manufacturing Co. Demolition tool for a hydraulic excavator
US5060378A (en) * 1989-12-15 1991-10-29 Labounty Manufacturing, Inc. Demolition tool for a hydraulic excavator
US5034100A (en) * 1990-11-28 1991-07-23 Wilbanks International Stationary drainage device with pressure roll
US5795440A (en) * 1993-12-20 1998-08-18 The Procter & Gamble Company Method of making wet pressed tissue paper
US5637194A (en) * 1993-12-20 1997-06-10 The Procter & Gamble Company Wet pressed paper web and method of making the same
US5776307A (en) * 1993-12-20 1998-07-07 The Procter & Gamble Company Method of making wet pressed tissue paper with felts having selected permeabilities
US5580423A (en) * 1993-12-20 1996-12-03 The Procter & Gamble Company Wet pressed paper web and method of making the same
US5846379A (en) * 1993-12-20 1998-12-08 The Procter & Gamble Company Wet pressed paper web and method of making the same
US5855739A (en) * 1993-12-20 1999-01-05 The Procter & Gamble Co. Pressed paper web and method of making the same
US5861082A (en) * 1993-12-20 1999-01-19 The Procter & Gamble Company Wet pressed paper web and method of making the same
US5904811A (en) * 1993-12-20 1999-05-18 The Procter & Gamble Company Wet pressed paper web and method of making the same
US5897745A (en) * 1994-06-29 1999-04-27 The Procter & Gamble Company Method of wet pressing tissue paper
US5830316A (en) * 1997-05-16 1998-11-03 The Procter & Gamble Company Method of wet pressing tissue paper with three felt layers
US6051105A (en) * 1997-05-16 2000-04-18 The Procter & Gamble Company Method of wet pressing tissue paper with three felt layers
US6103062A (en) * 1998-10-01 2000-08-15 The Procter & Gamble Company Method of wet pressing tissue paper

Also Published As

Publication number Publication date
SE396423B (sv) 1977-09-19
DE2313896B2 (de) 1976-08-19
DE2313896A1 (de) 1973-10-04
FI51228B (enrdf_load_html_response) 1976-08-02
FI51228C (fi) 1976-11-10

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