WO1984002726A1 - Presse - Google Patents

Presse Download PDF

Info

Publication number
WO1984002726A1
WO1984002726A1 PCT/FI1984/000001 FI8400001W WO8402726A1 WO 1984002726 A1 WO1984002726 A1 WO 1984002726A1 FI 8400001 W FI8400001 W FI 8400001W WO 8402726 A1 WO8402726 A1 WO 8402726A1
Authority
WO
WIPO (PCT)
Prior art keywords
belt
press
press according
rolls
supporting member
Prior art date
Application number
PCT/FI1984/000001
Other languages
English (en)
Inventor
Tapani Nyman
Original Assignee
Ahlstroem Oy
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 Ahlstroem Oy filed Critical Ahlstroem Oy
Priority to GB08421467A priority Critical patent/GB2142946B/en
Publication of WO1984002726A1 publication Critical patent/WO1984002726A1/fr

Links

Classifications

    • 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
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • 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
    • D21F3/02—Wet presses

Definitions

  • the present invention relates to a press for extracting water from webs wherein at least one of the compression surfaces forming the nip is formed of an endless, flexible belt loaded by means of a supporting member.
  • Structures of the aforementioned type are used in paper- making machines in order to form an extended nip and to render a higher water removal capacity than that of a conventional roll press.
  • the press area of the belt is determined by the length of that part of the belt which is supported by the supporting member.
  • the belt which is made of rubber is so flexible that it cannot press the web at an area outside the supporting member.
  • the present invention is based on the fact that the belt, due to its stiffness, exerts pressure on a longer part of the web than the loaded part.
  • Figure 1 is a schematic cross section of an extended nip press in accordance with the invention.
  • Figure 2 shows the press nip of Fig. 1 in a larger scale.
  • FIG. 3 is a schematic cross section of another embodiment of the invention.
  • Figure 4 is a schematic cross section of a third embodiment of the invention.
  • Figure 5 shows the press nip of Fig. 4 in a larger scale.
  • Figure 6 is a cross section of a fourth embodiment of the invention.
  • Figure 7 is a cross section of yet another embodiment of the invention.
  • Figure 8 is a section as on the line A-A of Fig. 6.
  • the press illustrated in Figs. 1 and 2 comprises two endless steel belts 1 and 2 between which a paper web 3 travels. Inside the belts 1 and 2 there are disposed rotatably mounted rolls 4 and 5 which act as loading and/or supporting members and which in a manner known per se cause the compression exerted on the web.
  • the belts 1 and 2 cause the web 3 to be under compression in a press nip 6 the length L of which exceeds the width 1 of the contact area between the roIIs 4 and 5 and the belts 1 and 2. This is caused by the bending stiffness of the steel belts.
  • Fig. 1 shows a press in which rolls 4 and 5 acting as loading and/or supporting members are disposed inside the belts 1 and 2 and supporting and loading rolls 8 and 9 are disposed outside the belts. In this way, an asymmetrical press nip has been provided for rolls 4 and 5.
  • the press illustrated in Fig. 6 comprises a steel belt 1 and a press roll 14 between which the web 3 travels. Rolls 15 and 16 acting as supporting and loading members are disposed outside the belt.
  • the belts may be grooved. Instead of rolls, supporting and loading members assembled of reels or wheels may be used. Instead of rolling elements connected by chain members, rolling elements moving in guiding grooves may be used.

Landscapes

  • Paper (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

Presse permettant l'extraction d'eau à partir de bandes (3), dans laquelle au moins l'une des deux surfaces de compression formant la ligne de contact de la presse (6) est formée d'une courroie flexible sans fin (1, 2) chargée à l'aide d'un organe de support (4, 5). A cause de sa rigidité à la flexion, la courroie exerce une pression sur une partie (L) de la bande plus longue que la partie supportée (I) de la courroie. L'organe de support est constitué de préférence par un rouleau (4, 5).
PCT/FI1984/000001 1983-01-04 1984-01-02 Presse WO1984002726A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08421467A GB2142946B (en) 1983-01-04 1984-01-02 Press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI830014A FI830014L (fi) 1983-01-04 1983-01-04 Press.

Publications (1)

Publication Number Publication Date
WO1984002726A1 true WO1984002726A1 (fr) 1984-07-19

Family

ID=8516557

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1984/000001 WO1984002726A1 (fr) 1983-01-04 1984-01-02 Presse

Country Status (5)

Country Link
DE (1) DE3490003T1 (fr)
FI (1) FI830014L (fr)
GB (1) GB2142946B (fr)
SE (1) SE441937B (fr)
WO (1) WO1984002726A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3629736A1 (de) * 1986-09-01 1988-03-03 Becker Gummiwerke Nasspresse zum entwaessern von faserstoffbahnen
US6309512B1 (en) * 1998-09-22 2001-10-30 Valmet Karlstad Ab Device for impulse-pressing a web

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4287021A (en) * 1979-08-27 1981-09-01 Beloit Corporation Extended nip press
EP0052359A2 (fr) * 1980-11-14 1982-05-26 Constructiewerkhuizen De Mets N.V. Presse fonctionnant en continu

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE233494C (fr) *
DE575453C (de) * 1931-12-12 1933-04-28 Siempelkamp Gmbh & Co Pressvorrichtung
DE655781C (de) * 1935-07-06 1938-01-22 Buckau R Wolf Akt Ges Maschf Pressvorrichtung zum Entwaessern von Bahnen oder Bogen aus Papier, Cellulose, Holzstoff, Pappe o. dgl.
DE843735C (de) * 1950-04-23 1952-07-14 Phrix Werke Ag Walzenpresse
DE923172C (de) * 1950-05-10 1955-07-25 Peter Voelskow Einrichtung zum kontinuierlichen Pressen
DE1563130A1 (de) * 1965-10-14 1970-01-02 Asea Ab Stromrichter mit Halbleiterventilen
DE2039652A1 (de) * 1970-08-10 1972-02-17 Dornbusch & Co Vorrichtung zur Druckbehandlung von Warenbahnen mit einem Walzenpaar
DE2709915A1 (de) * 1977-03-08 1978-09-14 Finckh Maschf Presse zum entwaessern von faserstoffsuspensionen
DE3030233C2 (de) * 1980-08-09 1988-10-20 J.M. Voith Gmbh, 7920 Heidenheim Naßpresse zum Entwässern von Faserbahnen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4287021A (en) * 1979-08-27 1981-09-01 Beloit Corporation Extended nip press
EP0052359A2 (fr) * 1980-11-14 1982-05-26 Constructiewerkhuizen De Mets N.V. Presse fonctionnant en continu

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3629736A1 (de) * 1986-09-01 1988-03-03 Becker Gummiwerke Nasspresse zum entwaessern von faserstoffbahnen
EP0258759A1 (fr) * 1986-09-01 1988-03-09 Gummiwerke Becker AG Presse humide pour la déshydratation de bandes de fibres
US6309512B1 (en) * 1998-09-22 2001-10-30 Valmet Karlstad Ab Device for impulse-pressing a web

Also Published As

Publication number Publication date
FI830014L (fi) 1984-07-05
SE441937B (sv) 1985-11-18
SE8404335D0 (sv) 1984-08-30
FI830014A0 (fi) 1983-01-04
GB2142946B (en) 1986-12-17
DE3490003T1 (de) 1985-03-21
GB2142946A (en) 1985-01-30
SE8404335L (sv) 1984-08-30
GB8421467D0 (en) 1984-09-26
DE3490003C2 (fr) 1988-12-29

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