WO2009024649A1 - Method for compensating for faults in a paper web - Google Patents
Method for compensating for faults in a paper web Download PDFInfo
- Publication number
- WO2009024649A1 WO2009024649A1 PCT/FI2008/050467 FI2008050467W WO2009024649A1 WO 2009024649 A1 WO2009024649 A1 WO 2009024649A1 FI 2008050467 W FI2008050467 W FI 2008050467W WO 2009024649 A1 WO2009024649 A1 WO 2009024649A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- web
- paper
- centre
- adjusted
- release angle
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012764 mineral filler Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F2/00—Transferring continuous webs from wet ends to press sections
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0063—Devices for threading a web tail through a paper-making machine
-
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
Definitions
- the present invention relates to a method for compensating for faults, such non uniform shrinkage, in a paper web.
- the matter concerns compensating for greater shrinkage that occurs in the edge areas of the web than in both the centre, in the press and drying sections of a paper machine.
- shrinkage in a paper web over its production width on a papermachine is uneven, in such a way that the shrinkage in the edge parts can be in the order of 7 %, whereas in the centre the shrinkage of the web can remain in the order of two or three percent.
- Edge areas of the web include but are not limited to, an increase in the porosity of the edges, an increase in roughness at the edges, creasing or cockling, variation in the percentage of mineral filler content and of course poorer dimensional stability.
- the exact nature of the problem will depend on the type of the press and drying sections of the paper machine in question, and on the paper grade in general.
- the present invention is intended to create an improvement in the adverse effects of shrinkage profile variation.
- the intention is to achieve the improvement in a manner that is very reasonably priced and simple.
- the aforementioned and other advantages and benefits of the present invention are achieved in the manner described in the accompanying claims.
- the basic idea of the invention is that the fault, no matter whether it is natural or the result of some operation, is affected in such a way that the variation in properties can be minimized.
- the shrinking of a paper web more at the edges than in the centre is a natural change, which when attempting to minimise also promotes an improvement of the quality of the paper reels at the edges.
- Figure 1 shows one embodiment of a flow guide used according to the invention in the discharge nozzle of a head box of a paper machine in the direction of flow of the stock;
- Figure 2 shows a second sub-area of the invention, in connection with the centre roll of the press section.
- flow guides are used, which are intended to affect the properties of the paper, by affecting the turbulence of the jet.
- the length of the flow guides in the direction of travel of the stock has a significant effect on the properties of the paper. This is because the machine direction orientation of the fibres changes significantly as result of the turbulence generated by the flow guides.
- a general rule is that the machine direction orientation of the fibres decreases as the length of the flow guides increases. In the present invention, this aforementioned property is exploited by making the flow guide or guides longer at the edges than in the centre.
- Figure 1 One example is shown in Figure 1 , though only by way of example and not restrictively.
- a flow guide 1 which is generally a plate-like piece.
- the edges 2 of the guides are clearly extended. Because the change in the machine direction magnitude of the fibre orientation in the edge areas of the web can also be a risk in terms of the operation of the paper machine, according to the invention other means are also used to achieve the desired effect.
- the angle of release of the paper web from the centre roll of the press section in an arrangement, which uses an open transfer from one roll to another, varies according to the draw and the magnitude of machine direction fibre orientation. If the magnitude of machine direction fibre orientation has been altered in the manner described above, in such a way that the orientation is less at the edges of the web, this means that the angle of release from the centre roll of the press section will change, in such a way that the web tends to remain attached to the roll at the edges of the roll more than the centre. The result of this is that the edge areas become permanently stretched more than the centre which can be extremely detrimental to the machine's subsequent operation in the dryer section.
- the angle, at which the paper web 4 running around the centre roll 3 of the press section detaches from the roll, is adjusted in a controlled manner, by using an adjustable air jet over the width of the web.
- One device by means of which it is possible to create and use the afore mentioned profile, is a device developed by Runtech Systems Oy and marketed under the trademark Air curtain.
- the said device which is marked with the reference number 5 in Figure 2
- the air jet being created is marked schematically with the reference number 6.
- the pressure of the air jet affects the angle of sheet release, thus by varying the cross machine pressure profile the release angle can be influenced in such a manner as to compensate for the variation in release angle created by the length profile of the flow guides in the headbox.
- the adverse effects on dryer section runnability can be controlled while retaining the positive effects of minimising variation in paper properties dependent on the turbulence created by the length profile of the flow guides in the headbox.
- a laser camera for example, is a suitable means for measuring the release angle.
Landscapes
- Paper (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/674,185 US20110214829A1 (en) | 2007-08-20 | 2008-08-18 | Method for compensating for faults in a paper web |
CA2697054A CA2697054A1 (en) | 2007-08-20 | 2008-08-18 | Method for compensating for faults in a paper web |
JP2010521453A JP2010537065A (en) | 2007-08-20 | 2008-08-18 | Method for correcting defects in a web |
BRPI0815625-5A2A BRPI0815625A2 (en) | 2007-08-20 | 2008-08-18 | Method for compensating for failures in a paper strip |
CN200880107461A CN101842534A (en) | 2007-08-20 | 2008-08-18 | Method for compensating for faults in a paper web |
EP08787740.3A EP2188445A4 (en) | 2007-08-20 | 2008-08-18 | Method for compensating for faults in a paper web |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20070626 | 2007-08-20 | ||
FI20070626A FI119441B (en) | 2007-08-20 | 2007-08-20 | Method for compensating deformation of a paper web |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009024649A1 true WO2009024649A1 (en) | 2009-02-26 |
Family
ID=38468695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI2008/050467 WO2009024649A1 (en) | 2007-08-20 | 2008-08-18 | Method for compensating for faults in a paper web |
Country Status (9)
Country | Link |
---|---|
US (1) | US20110214829A1 (en) |
EP (1) | EP2188445A4 (en) |
JP (1) | JP2010537065A (en) |
KR (1) | KR20100061691A (en) |
CN (1) | CN101842534A (en) |
BR (1) | BRPI0815625A2 (en) |
CA (1) | CA2697054A1 (en) |
FI (1) | FI119441B (en) |
WO (1) | WO2009024649A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110214829A1 (en) * | 2007-08-20 | 2011-09-08 | Runtech Systems Oy | Method for compensating for faults in a paper web |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11390483B2 (en) | 2017-10-20 | 2022-07-19 | Corelex Shin-Ei Co., Ltd. | Log roll manufacturing apparatus |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1457667A (en) * | 1973-03-07 | 1976-12-08 | Beloit Corp | Headbox for paper-making machines |
US5720852A (en) * | 1994-05-31 | 1998-02-24 | Valmet Paper Machinery Inc. | Method and device for stabilizing the running of a paper web in connection with a paper guide roll |
WO1998027275A1 (en) * | 1996-12-16 | 1998-06-25 | Valmet Corporation | Method and system for monitoring the process of separation of a web |
DE19841639A1 (en) * | 1998-09-11 | 2000-03-16 | Voith Sulzer Papiertech Patent | Web guide |
WO2001012898A1 (en) * | 1999-08-12 | 2001-02-22 | Runtech Systems Oy | Method and apparatus for the treatment of a material web and for control of the behavior of a material web |
Family Cites Families (34)
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US3070901A (en) * | 1956-02-01 | 1963-01-01 | Svenska Flaektfabriken Ab | Guiding air-borne webs |
GB993603A (en) * | 1962-11-15 | 1965-06-02 | Billeruds Ab | Method of producing extensible paper |
US3399111A (en) * | 1966-12-01 | 1968-08-27 | Huyck Corp | Supplemental belt in combination with an endless belt in papermaking and method of installing the supplemental belt |
JPS5924509A (en) * | 1982-07-30 | 1984-02-08 | Hitachi Ltd | Method and device for correcting asymmetry of material to be rolled in rolling mill |
US4918836A (en) * | 1987-02-13 | 1990-04-24 | Beloit Corporation | Tail cutter apparatus and method |
FI80090C (en) * | 1987-12-23 | 1990-04-10 | Ahlstroem Valmet | Method and apparatus in the inlet box of a paper machine for stable insulation of its lip beam |
US5014447A (en) * | 1988-02-10 | 1991-05-14 | Thermo Electron Web Systems, Inc. | Positive pressure web floater dryer with parallel flow |
US5232555A (en) * | 1988-09-29 | 1993-08-03 | Pulp And Paper Research Institute Of Canada | Wet cellulosic web transfer method using air doctor blade |
US5022166A (en) * | 1990-06-07 | 1991-06-11 | Union Camp Corporation | Flutter suppression air foils |
US5730923A (en) * | 1992-09-28 | 1998-03-24 | The University Of Tennessee Research Corporation | Post-treatment of non-woven webs |
DE19542448A1 (en) * | 1995-11-14 | 1997-05-15 | Voith Sulzer Papiermasch Gmbh | Method and device for determining the effect of adjusting actuators |
US5830321A (en) * | 1997-01-29 | 1998-11-03 | Kimberly-Clark Worldwide, Inc. | Method for improved rush transfer to produce high bulk without macrofolds |
CA2206382C (en) * | 1997-05-28 | 2000-08-22 | Asea Brown Boveri Inc. | Curl and profile correction with high velocity hoods |
FI108063B (en) * | 1997-09-09 | 2001-11-15 | Runtech Systems Oy | Method and apparatus for treating a web of material |
US6004432A (en) * | 1998-01-28 | 1999-12-21 | Beloit Technologies, Inc. | Sheet turn with vectored air supply |
US6207020B1 (en) * | 1998-05-12 | 2001-03-27 | International Paper Company | Method for conditioning paper and paperboard webs |
DE10004369A1 (en) * | 2000-02-02 | 2001-08-09 | Voith Paper Patent Gmbh | Transfer of an entry strip of a paper web |
DE10106684A1 (en) * | 2001-02-14 | 2002-08-29 | Voith Paper Patent Gmbh | Slat of a headbox of a paper, cardboard or tissue machine |
FI121240B (en) * | 2001-03-23 | 2010-08-31 | Metso Paper Automation Oy | Arrangements at a paper machine as well as a blow box |
DE10115618A1 (en) * | 2001-03-26 | 2002-10-02 | Voith Paper Patent Gmbh | Method and device for transferring a web |
US20030183353A1 (en) * | 2001-12-10 | 2003-10-02 | Metso Paper Karlstad Ab | Press section tail threading |
FI20025055A0 (en) * | 2002-03-27 | 2002-12-03 | Metso Paper Inc | Method for controlling a paper or board machine |
US7431800B2 (en) * | 2002-04-22 | 2008-10-07 | Stora Enso Ab | Device and method for on-line control of the fibre direction of a fibre web |
FI116389B (en) * | 2002-07-16 | 2005-11-15 | Millidyne Oy | Procedure for adjusting surface properties |
DE10242868A1 (en) * | 2002-09-17 | 2004-03-25 | Voith Paper Patent Gmbh | Papermaking machine headbox has sandwich construction guide vane incorporating sliding tab moving back and forth by compression spring and steel cable attached to spindle |
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DE20309429U1 (en) * | 2003-06-17 | 2003-09-18 | Reifenhäuser GmbH & Co. Maschinenfabrik, 53844 Troisdorf | Extraction device of a tubular film extrusion system |
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FI20060757L (en) * | 2006-08-25 | 2008-02-26 | Runtech Systems Oy | Method and device for guiding a paper web or the like |
FI119441B (en) * | 2007-08-20 | 2008-11-14 | Runtech Systems Oy | Method for compensating deformation of a paper web |
EP2240638B1 (en) * | 2007-12-31 | 2011-05-25 | Metso Paper, Inc. | Arrangement and method for saving energy in a drying section of a paper machine or the like |
DE102009022871A1 (en) * | 2009-05-27 | 2010-12-02 | Metso Paper, Inc. | Method for wireless feeding of web into single-wire extension of dryer section of e.g. paper machine, involves guiding insertion web from preceding drying cylinder to next drying cylinder, and detaching insertion web from preceding cylinder |
-
2007
- 2007-08-20 FI FI20070626A patent/FI119441B/en not_active IP Right Cessation
-
2008
- 2008-08-18 US US12/674,185 patent/US20110214829A1/en not_active Abandoned
- 2008-08-18 KR KR1020107005942A patent/KR20100061691A/en not_active Application Discontinuation
- 2008-08-18 WO PCT/FI2008/050467 patent/WO2009024649A1/en active Application Filing
- 2008-08-18 BR BRPI0815625-5A2A patent/BRPI0815625A2/en not_active IP Right Cessation
- 2008-08-18 EP EP08787740.3A patent/EP2188445A4/en not_active Withdrawn
- 2008-08-18 CN CN200880107461A patent/CN101842534A/en active Pending
- 2008-08-18 JP JP2010521453A patent/JP2010537065A/en active Pending
- 2008-08-18 CA CA2697054A patent/CA2697054A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1457667A (en) * | 1973-03-07 | 1976-12-08 | Beloit Corp | Headbox for paper-making machines |
US5720852A (en) * | 1994-05-31 | 1998-02-24 | Valmet Paper Machinery Inc. | Method and device for stabilizing the running of a paper web in connection with a paper guide roll |
WO1998027275A1 (en) * | 1996-12-16 | 1998-06-25 | Valmet Corporation | Method and system for monitoring the process of separation of a web |
DE19841639A1 (en) * | 1998-09-11 | 2000-03-16 | Voith Sulzer Papiertech Patent | Web guide |
WO2001012898A1 (en) * | 1999-08-12 | 2001-02-22 | Runtech Systems Oy | Method and apparatus for the treatment of a material web and for control of the behavior of a material web |
Non-Patent Citations (1)
Title |
---|
See also references of EP2188445A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110214829A1 (en) * | 2007-08-20 | 2011-09-08 | Runtech Systems Oy | Method for compensating for faults in a paper web |
Also Published As
Publication number | Publication date |
---|---|
BRPI0815625A2 (en) | 2015-02-18 |
US20110214829A1 (en) | 2011-09-08 |
CN101842534A (en) | 2010-09-22 |
KR20100061691A (en) | 2010-06-08 |
JP2010537065A (en) | 2010-12-02 |
EP2188445A1 (en) | 2010-05-26 |
EP2188445A4 (en) | 2014-01-08 |
CA2697054A1 (en) | 2009-02-26 |
FI20070626A0 (en) | 2007-08-20 |
FI119441B (en) | 2008-11-14 |
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