EP1238148B1 - Press device having an extended press nip for pressing a traveling paper or board web - Google Patents

Press device having an extended press nip for pressing a traveling paper or board web Download PDF

Info

Publication number: EP1238148B1
Authority: EP; European Patent Office
Prior art keywords: cylinder; press; shoe; length; press device
Prior art date: 1999-12-10
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

EP00983448A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP1238148A1 (en

Inventor

Jorma Snellman

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

Metso Paper 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.)

1999-12-10

Filing date

2000-12-07

Publication date

2005-03-23

Family has litigation

First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20418088&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1238148(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

2000-12-07 Application filed by Metso Paper Oy filed Critical Metso Paper Oy

2002-09-11 Publication of EP1238148A1 publication Critical patent/EP1238148A1/en

2005-03-23 Application granted granted Critical

2005-03-23 Publication of EP1238148B1 publication Critical patent/EP1238148B1/en

2020-12-07 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Images

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
- D21F3/0218—Shoe presses

Definitions

the press device according to the invention particularly advantageously can be utilised for wet-pressing of moist paper or paperboard webs, but also for calendering or other finishing of dried paper or paperboard.
the press device according to the invention can also be utilised for other fibre webs than paper and paperboard.
the patent publication US 4,917,768 discloses a previously known shoe press device in which the press shoe is supported via tubular sleeves rigidly affixed to and spaced apart on a support in a direction across the machine direction. Thereby, the sleeves are received in cylindrical recesses in the press shoe in order to allow the press shoe to move toward or from a counter roll and the nip pressure to be varied.
the disclosed shoe press comprises hydraulic jacks upstream and downstream the sleeves for forcing the press shoe against the counter roll and for pivoting the shoe around an axis across the machine in order to vary the nip pressure in the machine direction.
the two-part member consists of first and second cylinders, while the coupler comprises a piston which is slidably received in the two cylinders.
the two-part member instead comprises first and second pistons, while the coupler comprises a cylinder which surrounds both pistons.
the press shoe In order to control the conditions in the nip of a shoe press, such as the pressure profile (curve) through the nip, it is usually desirable to be able to move to the press shoe forward or backwards in the machine direction in order to be able to influence the pressure profile through the nip so that the nip pressure is highest in the beginning and lower in the end of the nip, or vice versa.
the press shoe in principle, will follow an arc-shaped path with its centre in the central axis of the counter roll. This may result in a skewness in the machine direction between the parts included in the loading cylinders, i.e.
the first object of the present invention is to provide a press device having an extended nip for pressing a running paper or paperboard web in which the press shoe unintentionally or intentionally can be tilted/pivoted around an imaginary axis across the machine direction with minimum skewness between the parts included in the loading cylinders, and without generating any excessively large forces directed towards a possible shoe support or the press shoe becoming unstable if the forces are directed against the machine direction (away from a possible shoe support).
this first object of the present invention is achieved by means of a press device comprising a press shoe aligned across the machine direction arranged for forming an extended nip in cooperation with a backing member for passage of the web during the pressing, a support which supports the press shoe in a movable way in a direction toward the backing member via aplurality of loading cylinders spaced apart along the press shoe for enabling application of pressure on the web during the pressing.
Each of the loading cylinders comprises a first cylinder member having a first cylinder end which is attached to or integrated in the press shoe, and a second cylinder member having a second cylinder end which is attached to or integrated in the support, which first and second cylinder members are slidably connectedby a connecting member.
Each of the above-mentioned loading cylinders 106 comprises a first cylinder member 107 having a first cylinder end 108 which is attached to or integrated in the press shoe 101, and a second cylinder member 109 having a second cylinder end 110 which is attached to or integrated in the support 105.
the first and second cylinder members 107, 109 are slidably connected by a connecting member 111, wherein the connecting member 111 and the first cylinder member 107 are movable in relation to each other with a first length of stroke L1, while the connecting member 111 and the second cylinder member 109 are movable in relation to each other with a second length of stroke L2, and the connecting member has a third length L3.
length of stroke should be understood as the maximum length of a cylinder member available for sliding displacement of a second, cooperating member in relation to said cylinder member.
the first length of stroke L1 is less than half of the second length of stroke L2.
connection is arranged in such a way that a central axis C1 of the first cylinder member 107 and a central axis C3 of the connecting member 111 can be tilted to an angle in relation to each other and to a central axis C2 of the second 109 cylinder member during an intentional or unintentional tilting of the press shoe 101 during the pressing.
first L1 and second L2 lengths of stroke, the third length L3, and the geometrical positions of the contacting seals 112,113 are adapted in order to minimise the angle A2 between the central axis C3 of the connecting member and the central axis C2 of the second cylinder member during the tilting.
the above-mentioned tilting either can be intentional or unintentional.
the seals 112, 113 can advantageously be of the type disclosed in the above-discussed EP 0 933 471.
the connecting member can have different geometrical shapes.
the backing member 102 is a rotatable counter roll
a flexible belt 118 is arranged in an endless loop for running between the press shoe 101 and the paper or paperboard web 104 during the pressing.
the flexible belt preferably has the shape of a sleeve.
the press device having an extended nip according to the invention preferably is intended for wet-pressing, or for calendering a paper or paperboard web.
Fig. 1A shows a shoe press device with its press shoe in a first position, intended to generate a substantially symmetrical pressure curve through the nip.
the intentional displacement of the press shoe 1 into the second position shown in Fig. 1B is intended to displace the pressure maximum of the pressure curve towards the end of the nip, wherein the press shoe 1 and, consequently, the central axis c1 of the therewith associated first cylinder member 7 will be tilted forwards in the machine direction MD to an angle a1 in relation to the central axis c2 of the second cylinder member 9.
the angles shown in the drawings for reasons of clarity, have been exaggerated.
Figs. 2A and 2B instead illustrate a press device having an extended nip according to a preferred embodiment of the invention.
Fig. 2A shows the press device with its press shoe in a first position similar to the first position in Fig. 1A
Fig. 2B shows the press device with its press shoe intentionally moved into a second position similar to the second position in Fig. 1B.
the press shoe 101 has been intentionally tilted approximately as much as the press shoe 1 in Fig. 1B in order to make it possible to obtain a higher nip pressure in the end of the nip than in its beginning. Accordingly, the angle A1 between the central axis C1 of the first cylinder member 107 and the central axis C2 of the second cylinder member 109 is approximately as large as the angle a1 in Fig. 1B.
the angle A2 between the central axis C3 of the connecting member 111 and the central axis C2 of the second cylinder member 109 now becomes significantly smaller than the corresponding angle a2 between the central axes c2 and c3 in Fig. 1B.
the minimization, i.e. reduction or even elimination, of the angle A2 which is achieved by means of the present invention reduces or even eliminates the force components in the machine direction MD, originating from pressurisation of the working chamber 114, which are exercised by the press shoe 101 on the shoe support 118.

Landscapes

Paper (AREA)
Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
Advancing Webs (AREA)

EP00983448A 1999-12-10 2000-12-07 Press device having an extended press nip for pressing a traveling paper or board web Expired - Lifetime EP1238148B1 (en)

Applications Claiming Priority (3)

Application Number	Priority Date	Filing Date	Title
SE9904537A SE515484C2 (sv)	1999-12-10	1999-12-10	Pressanordning med förlängt pressnyp för pressning av en löpande papper- eller kartongbana
SE9904537		1999-12-10
PCT/IB2000/001997 WO2001042559A1 (en)	1999-12-10	2000-12-07	Press device having an extended press nip for pressing a traveling paperboard web

Publications (2)

Publication Number	Publication Date
EP1238148A1 EP1238148A1 (en)	2002-09-11
EP1238148B1 true EP1238148B1 (en)	2005-03-23

Family

ID=20418088

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP00983448A Expired - Lifetime EP1238148B1 (en)	1999-12-10	2000-12-07	Press device having an extended press nip for pressing a traveling paper or board web

Country Status (9)

Country	Link
EP (1)	EP1238148B1 (sv)
JP (1)	JP4838473B2 (sv)
CN (1)	CN1181245C (sv)
AT (1)	ATE291660T1 (sv)
AU (1)	AU2020201A (sv)
CA (1)	CA2392520C (sv)
DE (1)	DE60018970T2 (sv)
SE (1)	SE515484C2 (sv)
WO (1)	WO2001042559A1 (sv)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FI118088B (sv) *	2004-02-19	2007-06-29	Vaahto Oy	Anordning för belastning av en skopress
FI126727B (sv) *	2012-10-19	2017-04-28	Valmet Technologies Inc	Skovals, långnypspress och fiberbanmaskin
IT202000020926A1 (it) *	2020-09-03	2022-03-03	A Celli Paper Spa	Pressa a scarpa per carta e relativo metodo

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
AT360831B (de) *	1977-12-20	1981-02-10	Escher Wyss Ag	Hydraulisches stuetzelement
CH659865A5 (de) *	1982-07-30	1987-02-27	Escher Wyss Ag	Hydrostatisches stuetzelement und dessen verwendung in einer walzvorrichtung.
SE461171C (sv) *	1988-05-25	1992-08-17	Valmet Paper Machinery Inc	Press med laangt nyp foer pappers- eller kartongmaskiner
FI87484C (sv) *	1988-12-15	1993-01-11	Valmet Paper Machinery Inc	Stödarrangemang för böjningskompenserad vals
DE29900914U1 (de) *	1998-01-30	1999-12-23	Valmet Corp., Helsinki	Schuhpresse

1999
- 1999-12-10 SE SE9904537A patent/SE515484C2/sv not_active IP Right Cessation
2000
- 2000-12-07 WO PCT/IB2000/001997 patent/WO2001042559A1/en active Search and Examination
- 2000-12-07 CA CA002392520A patent/CA2392520C/en not_active Expired - Fee Related
- 2000-12-07 JP JP2001544423A patent/JP4838473B2/ja not_active Expired - Fee Related
- 2000-12-07 DE DE60018970T patent/DE60018970T2/de not_active Expired - Lifetime
- 2000-12-07 AU AU20202/01A patent/AU2020201A/en not_active Abandoned
- 2000-12-07 CN CNB00816942XA patent/CN1181245C/zh not_active Expired - Lifetime
- 2000-12-07 EP EP00983448A patent/EP1238148B1/en not_active Expired - Lifetime
- 2000-12-07 AT AT00983448T patent/ATE291660T1/de not_active IP Right Cessation

Also Published As

Publication number	Publication date
SE9904537D0 (sv)	1999-12-10
WO2001042559A1 (en)	2001-06-14
CA2392520C (en)	2009-02-10
AU2020201A (en)	2001-06-18
DE60018970D1 (de)	2005-04-28
JP2003516482A (ja)	2003-05-13
SE515484C2 (sv)	2001-08-13
EP1238148A1 (en)	2002-09-11
JP4838473B2 (ja)	2011-12-14
ATE291660T1 (de)	2005-04-15
DE60018970T2 (de)	2006-01-19
WO2001042559A9 (en)	2002-11-28
CA2392520A1 (en)	2001-06-14
CN1409785A (zh)	2003-04-09
CN1181245C (zh)	2004-12-22
SE9904537L (sv)	2001-06-11

Publication	Publication Date	Title
US6083352A (en)	2000-07-04	Shoe press
EP1238148B1 (en)	2005-03-23	Press device having an extended press nip for pressing a traveling paper or board web
US6387219B2 (en)	2002-05-14	Press device having an extended press nip for pressing a traveling paper or paperboard web
CA2259768C (en)	2004-05-11	Shoe press
EP2179087B1 (en)	2011-10-12	Pressing apparatus for a paper- or board-making machine for removing fluids from a web by pressing, and a method for treating a web in a paper- or board-making machine
US7172679B2 (en)	2007-02-06	Press device having an extended press nip for pressing of a travelling paperboard web, and procedure for controlling the pressure curve in the machine direction by such press nip
US6409884B2 (en)	2002-06-25	Press device having an extended nip for pressing a running paper or paperboard web
EP1605096B1 (en)	2007-09-05	Shoe press
KR100473915B1 (ko)	2005-07-18	유압식균압밸브를갖춘확장닙프레스장치
US20240044078A1 (en)	2024-02-08	Support body and paper machine comprising such a support body
EP1240387B1 (en)	2005-05-18	Apparatus and method for pressing a paper web
US6379503B1 (en)	2002-04-30	Apparatus and method for mounting and dismantling a wear body in a paper making machine
CA2224298C (en)	2006-09-19	Method and apparatus including an extended nip for calendering a web
SE9800262L (sv)	1999-07-31	Skopress

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2004-09-15	RTI1	Title (correction)	Free format text: PRESS DEVICE HAVING AN EXTENDED PRESS NIP FOR PRESSING A TRAVELING PAPER OR BOARD WEB
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