EP0818573A3 - Process and apparatus for dewatering a paper web - Google Patents

Process and apparatus for dewatering a paper web Download PDF

Info

Publication number
EP0818573A3
EP0818573A3 EP97108063A EP97108063A EP0818573A3 EP 0818573 A3 EP0818573 A3 EP 0818573A3 EP 97108063 A EP97108063 A EP 97108063A EP 97108063 A EP97108063 A EP 97108063A EP 0818573 A3 EP0818573 A3 EP 0818573A3
Authority
EP
European Patent Office
Prior art keywords
paper web
band
dewatering
belt
moisture
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
EP97108063A
Other languages
German (de)
French (fr)
Other versions
EP0818573A2 (en
EP0818573B1 (en
Inventor
Wolfgang Mayer
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.)
Voith Patent GmbH
Original Assignee
Voith Sulzer Papiermaschinen GmbH
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 Voith Sulzer Papiermaschinen GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Publication of EP0818573A2 publication Critical patent/EP0818573A2/en
Publication of EP0818573A3 publication Critical patent/EP0818573A3/en
Application granted granted Critical
Publication of EP0818573B1 publication Critical patent/EP0818573B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • D21F3/0272—Wet presses in combination with suction or blowing devices

Abstract

Es werden ein Verfahren zum Entwässern einer Papierbahn (14) durch Einwirkung eines Gasdruckes und eine hierzu geeignete Vorrichtung (10) angegeben, wobei ein im wesentlichen quer durch die Papierbahn (14) gerichteter Gasstrom erzeugt wird, durch den Feuchtigkeit aus der Papierbahn (14) ausgetrieben wird. Dies kann dadurch geschehen, daß die Papierbahn zwischen zwei Bändern geführt wird, wovon das erste Band (20) aus einem weichen, möglichst trockenen und leicht kompressiblen Material besteht und das zweite Band (22) aus einem harten, relativ inkompressiblen und wasseraufnahmefähigen Material besteht. Infolge der Kompression des ersten Bandes (20) beim Eintreten in den Preßspalt (12) wird eine durch die Papierbahn (14) in Richtung auf das zweite Band (22) gebildete Gasströmung erzeugt, durch die Feuchtigkeit mitgenommen wird, die zum großen Teil von dem zweiten Band (22) absorbiert wird.

Figure 00000001
The invention relates to a method for dewatering a paper web (14) by the action of a gas pressure and a device (10) suitable for this purpose, wherein a gas stream which is directed essentially transversely through the paper web (14) is generated, through which moisture from the paper web (14) is driven out. This can be done in that the paper web is guided between two belts, of which the first belt (20) consists of a soft, as dry and easily compressible material as possible and the second belt (22) consists of a hard, relatively incompressible and water-absorbent material. As a result of the compression of the first band (20) as it enters the press nip (12), a gas flow is formed by the paper web (14) in the direction of the second band (22), which entrains moisture, which is largely from it second band (22) is absorbed.
Figure 00000001
EP97108063A 1996-07-11 1997-05-17 Process and apparatus for dewatering a paper web Expired - Lifetime EP0818573B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19627890 1996-07-11
DE19627890A DE19627890A1 (en) 1996-07-11 1996-07-11 Method and device for dewatering a paper web

Publications (3)

Publication Number Publication Date
EP0818573A2 EP0818573A2 (en) 1998-01-14
EP0818573A3 true EP0818573A3 (en) 1999-01-13
EP0818573B1 EP0818573B1 (en) 2002-08-21

Family

ID=7799503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97108063A Expired - Lifetime EP0818573B1 (en) 1996-07-11 1997-05-17 Process and apparatus for dewatering a paper web

Country Status (3)

Country Link
EP (1) EP0818573B1 (en)
CA (1) CA2210653A1 (en)
DE (2) DE19627890A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000006825A1 (en) * 1998-07-27 2000-02-10 Lefkowitz Leonard R Air pumping belt
DE19946986A1 (en) * 1999-09-30 2001-04-05 Voith Paper Patent Gmbh Press section of a papermaking or cardboard prodn machine has at least one water extraction station where water is forced out of the web by gas in a pressure zone
DE19946979A1 (en) * 1999-09-30 2001-04-05 Voith Paper Patent Gmbh Assembly for the extraction of water from a wet paper/cardboard web has a support roller facing a blower box to carry the web through between a lower blanket and an upper membrane covered by a perforated belt
DE19946971A1 (en) 1999-09-30 2001-04-05 Voith Paper Patent Gmbh Device for dewatering a material web
DE10304575A1 (en) * 2003-02-05 2004-08-19 Voith Paper Patent Gmbh Press gap, to extract water from a wet web, of paper/cardboard/tissue, has compressed air channels in the counter roller mantle to form an air cushion over the web at the press roller mantle recess
US20230295871A1 (en) * 2022-02-11 2023-09-21 David Beck Displacement dewatering a web using compressed gas

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3416423A1 (en) * 1983-05-12 1984-11-15 Valmet Oy, Helsinki PAPER MACHINE PRESS ROLLER, WHICH IS PROVIDED WITH AN ELASTIC LAYER, AND PAPER MACHINE PRESS, IN WHICH THE PRESS PRESS ROLLER IS INSERTED
EP0304561A1 (en) * 1987-08-22 1989-03-01 Sulzer-Escher Wyss Gmbh Dewatering press with steam supply
US4888096A (en) * 1987-12-02 1989-12-19 Inotech Process Ltd. Roll press for removing water from a web of paper using solid grooved roll and compressed air
US5082533A (en) * 1990-04-10 1992-01-21 Beloit Corporation Heated extended nip press with porous roll layers
WO1997026406A1 (en) * 1996-01-19 1997-07-24 Lefkowitz Leonard R Belt, method and apparatus for dewatering web in press nip

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2960999B2 (en) * 1991-09-04 1999-10-12 三菱重工業株式会社 Wet paper transfer device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3416423A1 (en) * 1983-05-12 1984-11-15 Valmet Oy, Helsinki PAPER MACHINE PRESS ROLLER, WHICH IS PROVIDED WITH AN ELASTIC LAYER, AND PAPER MACHINE PRESS, IN WHICH THE PRESS PRESS ROLLER IS INSERTED
EP0304561A1 (en) * 1987-08-22 1989-03-01 Sulzer-Escher Wyss Gmbh Dewatering press with steam supply
US4888096A (en) * 1987-12-02 1989-12-19 Inotech Process Ltd. Roll press for removing water from a web of paper using solid grooved roll and compressed air
US5082533A (en) * 1990-04-10 1992-01-21 Beloit Corporation Heated extended nip press with porous roll layers
WO1997026406A1 (en) * 1996-01-19 1997-07-24 Lefkowitz Leonard R Belt, method and apparatus for dewatering web in press nip

Also Published As

Publication number Publication date
CA2210653A1 (en) 1998-01-11
DE59708001D1 (en) 2002-09-26
DE19627890A1 (en) 1998-01-15
EP0818573A2 (en) 1998-01-14
EP0818573B1 (en) 2002-08-21

Similar Documents

Publication Publication Date Title
EP1397587B1 (en) Method and device for producing a fibre strip provided with a three-dimensional surface structure
EP1749934B1 (en) Machine for manufacturing tissue paper
EP1754824A1 (en) Method for making tissue paper
ATE216444T1 (en) METHOD AND DEVICE FOR DEWATERING A PAPER OR CARDBOARD WEB BY PRESSING
EP0818573A3 (en) Process and apparatus for dewatering a paper web
CH678073A5 (en)
EP2360314A2 (en) Transfer belt
DE4318036C1 (en) Press unit of a paper machine for the production of tissue paper
DE1760381A1 (en) Method and device for continuous dewatering of leather and leather-like material
EP0828027A3 (en) Press section and process for dewatering a wet fibrous web
DE19702575A1 (en) Machine for the production of a fibrous web
DE19852431B4 (en) Plant for web drying of a fibrous web
EP0816560A3 (en) Pressing device
DE69627503T2 (en) METHOD FOR PRODUCING WOOD MATERIAL PANELS
EP3919677A1 (en) Method and device for producing a structured sheet of fibrous material
DE19801417A1 (en) Papermaking web press section for water extraction
EP1001077A3 (en) Process and apparatus for treating a web material
EP1022380A3 (en) Pressing arrangement
EP0374541A3 (en) Method for cleaning a carding web
EP1586700B1 (en) Paper machine
DE19837648C2 (en) Compressed nonwoven wipes and processes for their production
EP0931876A3 (en) Press section
EP1754822A3 (en) Method for operating a pressing arrangement
DE174204C (en)
EP1132208A3 (en) Device for the treatment of a paper web

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

Kind code of ref document: A2

Designated state(s): DE FI SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VOITH SULZER PAPIERTECHNIK PATENT GMBH

17P Request for examination filed

Effective date: 19990713

AKX Designation fees paid

Free format text: DE FI SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VOITH PAPER PATENT GMBH

17Q First examination report despatched

Effective date: 20010629

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FI SE

REF Corresponds to:

Ref document number: 59708001

Country of ref document: DE

Date of ref document: 20020926

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20030522

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

Ref country code: DE

Payment date: 20050510

Year of fee payment: 9

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

Ref country code: SE

Payment date: 20050512

Year of fee payment: 9

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

Ref country code: FI

Payment date: 20050513

Year of fee payment: 9

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

Ref country code: FI

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

Effective date: 20060517

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

Ref country code: SE

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

Effective date: 20060518

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: 20061201

EUG Se: european patent has lapsed