EP0122702A1 - Entwässerungsgeräte für Faserstoffsupensionen auf einer Papiermaschine - Google Patents

Entwässerungsgeräte für Faserstoffsupensionen auf einer Papiermaschine Download PDF

Info

Publication number
EP0122702A1
EP0122702A1 EP84301199A EP84301199A EP0122702A1 EP 0122702 A1 EP0122702 A1 EP 0122702A1 EP 84301199 A EP84301199 A EP 84301199A EP 84301199 A EP84301199 A EP 84301199A EP 0122702 A1 EP0122702 A1 EP 0122702A1
Authority
EP
European Patent Office
Prior art keywords
cover
water
wire
fibrous suspension
open area
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.)
Granted
Application number
EP84301199A
Other languages
English (en)
French (fr)
Other versions
EP0122702B1 (de
EP0122702B2 (de
Inventor
Ronnie Abraham Arav
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.)
Beloit Walmsley Ltd
Original Assignee
Beloit Walmsley Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10539762&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0122702(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Beloit Walmsley Ltd filed Critical Beloit Walmsley Ltd
Publication of EP0122702A1 publication Critical patent/EP0122702A1/de
Publication of EP0122702B1 publication Critical patent/EP0122702B1/de
Application granted granted Critical
Publication of EP0122702B2 publication Critical patent/EP0122702B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • D21F1/48—Suction apparatus
    • 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

Definitions

  • the present invention relates to apparatus for dewatering fibrous suspensions-on a paper forming machine.
  • the fibrous suspension passes between top and bottom forming wires and water is extracted from the suspension in an upward direction by use of an auto-slice and a curved inverted suction box which contacts the top wire.
  • the two wires trap the stock over a lead-in-foil and water flows in an upward direction into the auto-slice and afterwards, due to the continuing pressure of the two wires, the dewatering action is continued in an upward direction into the apertures of the inverted suction box.
  • a transfer suction box is disposed downstream of the inverted suction box on the side of the bottom wire and vacuum applied to the suction-box reverses the direction of flow and a downward dewatering action takes place together with the transfer of stock to the bottom wire.
  • the cover has a typical radius of five metres and its contacting surface with the top wire is open to vacuum.
  • the openings in the cover are in the form of slots or drilled holes. The arrangement is such as to produce upward dewatering throughout its whole length.
  • apparatus for dewatering a fibrous suspension on a paper forming machine comprising a suction housing having an active surface or cover adapted to co-operate with a top wire to urge that wire towards a forming wire, the fibrous suspension being trapped between the top wire and the forming wire, and' the cover having a first open area by means of which water is removed upwardly and a second part downstream of the first open area which urges water downwardly.
  • the first open area comprises a plurality of slots or foils defining slots or a plurality of drilled holes whilst the second part is preferably solid.
  • the open area in the first part of the cover may be reduced in the downstream direction
  • the solid part of the cover will not permit any dewatering to take place through the cover and, consequently, the pressure of the two wires will force the dewatering action to reverse its direction and go downwards.
  • a method of dewatering a fibrous suspension on a paper forming machine in which.a fibrous suspension trapped between a top wire and a bottom forming wire is moved past an active surface ' or cover of a suction housing with the top wire contacting the cover for the purpose of removing water from the fibrous suspension, wherein the water is extracted in an upward direction as the fibrous suspension moves past a first open area of the cover, and wherein the water is directed downwardly as the fibrous suspension moves past a second part of the cover disposed downstream of the first area.
  • the machine comprises an endless top-wire 1 which is entrained around rolls 3.
  • Dewatering apparatus in the form of a curved inverted vacuum box having a suction housing 7 is disposed within the top-wire 1 and has an active surface or cover 9 which co-operates with the top-wire 1.
  • the cover 9 urges the top-wire 1 towards a forming wire 5.
  • the fibrous suspension is trapped between the top-wire 1 and the forming wire 5.
  • the wires 1, 5 move in the direction indicated by arrows A.
  • the forming wire 5 passes over a l.ead-in-foil 11 which urges water upwardly.
  • An auto-slice-13 immediately downstream of the lead-in-foil removes a proportion of the water-in the upward direction.
  • a further portion of the water is removed upwardly by a first part of the cover 9 which has an open area and to which suction is applied from the suction housing.
  • the open area extends over the region shown at 15 and is formed by a plurality of foils defining slots or by drilled holes.
  • the open area may have a compound curvature with a radius which decreases inthe downstream direction in order to generate a progressively higher dewatering pressure.
  • a second part of the cover, generally indicated at-17, is solid. Thus, no dewatering can-take place through the cover in this part and, consequently, the pressure of the two wires will force the dewatering action to reverse its direction and go downwards.
  • the dewatering apparatus of the present invention has the following advantages:-
  • the retention of the Bel Bond will improve.
  • the water coming down from the second part of the vacuum box will lubricate the transfer- box cover and contribute to a longer suction transfer box cover life.

Landscapes

  • Paper (AREA)
EP84301199A 1983-03-17 1984-02-24 Entwässerungsgeräte für Faserstoffsupensionen auf einer Papiermaschine Expired - Lifetime EP0122702B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838307437A GB8307437D0 (en) 1983-03-17 1983-03-17 Apparatus for dewatering fibrous suspensions on paper forming machine
GB8307437 1983-03-17

Publications (3)

Publication Number Publication Date
EP0122702A1 true EP0122702A1 (de) 1984-10-24
EP0122702B1 EP0122702B1 (de) 1986-07-30
EP0122702B2 EP0122702B2 (de) 1990-03-14

Family

ID=10539762

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84301199A Expired - Lifetime EP0122702B2 (de) 1983-03-17 1984-02-24 Entwässerungsgeräte für Faserstoffsupensionen auf einer Papiermaschine

Country Status (6)

Country Link
EP (1) EP0122702B2 (de)
DE (1) DE3460372D1 (de)
FI (1) FI79730C (de)
GB (1) GB8307437D0 (de)
PL (1) PL143765B1 (de)
ZA (1) ZA841487B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0258918A1 (de) * 1986-09-05 1988-03-09 A.W.E. ANTI WEAR ENGINEERING Srl Verfahren zum Entwässern eines Papierbreis und zur gleichzeitigen Formung einer Bahn in einem Zweisiebesystem und Vorrichtung zur Durchführung des Verfahrens
EP0346519A1 (de) * 1988-06-16 1989-12-20 GUSTAV REINHARD GMBH & CO. KG Entwässerungseinheit für Langsieb-Papiermaschinen
WO1990015899A1 (de) * 1989-06-21 1990-12-27 Gustav Reinhard Gmbh & Co. Kg Verfahren zur entwässerung eines wasserhaltigen faservlieses auf langsieb-papiermaschinen und zugehörige entwässerungseinheit
US5074964A (en) * 1989-05-08 1991-12-24 Valmet-Ahlstrom Inc. Web forming apparatus having a double wire section

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2289671A1 (fr) * 1974-10-25 1976-05-28 Valmet Oy Perfectionnements aux sections de formation de la feuille des machines a papier mousseline
FR2350422A1 (fr) * 1976-05-04 1977-12-02 Australian Paper Manufacturers Perfectionnements a l'elimination de l'eau de suspensions de fibres
FR2388936A1 (fr) * 1977-04-28 1978-11-24 Valmet Oy Procede de fabrication de carton a couches multiples et ensemble de formage de bande appliquant ce procede
DE3315023A1 (de) * 1982-04-30 1983-11-10 Valmet Oy, 00130 Helsinki Formschuh fuer den former einer papiermaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2289671A1 (fr) * 1974-10-25 1976-05-28 Valmet Oy Perfectionnements aux sections de formation de la feuille des machines a papier mousseline
FR2350422A1 (fr) * 1976-05-04 1977-12-02 Australian Paper Manufacturers Perfectionnements a l'elimination de l'eau de suspensions de fibres
FR2388936A1 (fr) * 1977-04-28 1978-11-24 Valmet Oy Procede de fabrication de carton a couches multiples et ensemble de formage de bande appliquant ce procede
DE3315023A1 (de) * 1982-04-30 1983-11-10 Valmet Oy, 00130 Helsinki Formschuh fuer den former einer papiermaschine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0258918A1 (de) * 1986-09-05 1988-03-09 A.W.E. ANTI WEAR ENGINEERING Srl Verfahren zum Entwässern eines Papierbreis und zur gleichzeitigen Formung einer Bahn in einem Zweisiebesystem und Vorrichtung zur Durchführung des Verfahrens
EP0346519A1 (de) * 1988-06-16 1989-12-20 GUSTAV REINHARD GMBH & CO. KG Entwässerungseinheit für Langsieb-Papiermaschinen
US5074964A (en) * 1989-05-08 1991-12-24 Valmet-Ahlstrom Inc. Web forming apparatus having a double wire section
WO1990015899A1 (de) * 1989-06-21 1990-12-27 Gustav Reinhard Gmbh & Co. Kg Verfahren zur entwässerung eines wasserhaltigen faservlieses auf langsieb-papiermaschinen und zugehörige entwässerungseinheit

Also Published As

Publication number Publication date
PL246712A1 (en) 1984-11-08
GB8307437D0 (en) 1983-04-27
ZA841487B (en) 1984-10-31
FI840902A (fi) 1984-09-18
FI79730C (fi) 1990-02-12
EP0122702B1 (de) 1986-07-30
PL143765B1 (en) 1988-03-31
FI840902A0 (fi) 1984-03-07
EP0122702B2 (de) 1990-03-14
FI79730B (fi) 1989-10-31
DE3460372D1 (en) 1986-09-04

Similar Documents

Publication Publication Date Title
CA1242914A (en) Process and equipment in the forming of paper web
US4925531A (en) Twin wire former for a paper machine
CA1176492A (en) Twin-wire paper machine and method of opertion
CA2489659A1 (en) Forming of a paper or board web in a twin-wire former or in a twin-wire section of a former
US4557802A (en) Apparatus for affecting a web drained on a wire
EP0427691B1 (de) Doppelsiebformer in einer Papiermaschine
KR900010147A (ko) 웨브 성형 방법 및 장치
EP0504123A1 (de) Doppelsiebpartie einer Papiermaschine
US7332060B2 (en) Twin wire former
EP0136000B1 (de) Papiermaschine
US4459175A (en) Longitudinal wire papermaking machine
EP0122702B1 (de) Entwässerungsgeräte für Faserstoffsupensionen auf einer Papiermaschine
KR100362492B1 (ko) 제지기계용하이브리드포머
EP0299940B1 (de) Nasspartie einer Papiermaschine
US3355350A (en) Paper machine
US3013605A (en) Trailing edge seal for moving suction belt apparatus
EP0122701B1 (de) Entwässerungsgeräte
US3775243A (en) Water saveall for grooved roll in paper machine press nip
US6716315B2 (en) Water draining device
EP0393656B1 (de) Einrichtung in einer Papiermaschine zur Erzielung von Aufwärtsentwässerung
US3637460A (en) Dewatering apparatus
WO2003093574A1 (en) Process arrangement in the short circulation of a paper machine
EP1327715B1 (de) Vorrichtung zur Herstellung einer Papier- oder Pappebahn
WO1995034713A1 (en) Gap former in a paper machine
SU718517A1 (ru) Сеточна часть бумагоделательной машины

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19841221

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

ITF It: translation for a ep patent filed

Owner name: ING. C. GREGORJ S.P.A.

REF Corresponds to:

Ref document number: 3460372

Country of ref document: DE

Date of ref document: 19860904

ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: SULZER-ESCHER WYSS GMBH

Effective date: 19870428

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 19900314

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): DE FR GB IT SE

ITF It: translation for a ep patent filed

Owner name: ING. C. GREGORJ S.P.A.

ET3 Fr: translation filed ** decision concerning opposition
ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 84301199.0

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20000901

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011201

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030130

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20030204

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20030206

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20040223

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

EUG Se: european patent has lapsed