CA2566520A1 - Forming sieve for the wet end section of a paper machine - Google Patents
Forming sieve for the wet end section of a paper machineInfo
- Publication number
- CA2566520A1 CA2566520A1 CA002566520A CA2566520A CA2566520A1 CA 2566520 A1 CA2566520 A1 CA 2566520A1 CA 002566520 A CA002566520 A CA 002566520A CA 2566520 A CA2566520 A CA 2566520A CA 2566520 A1 CA2566520 A1 CA 2566520A1
- Authority
- CA
- Canada
- Prior art keywords
- sieve
- thread
- threads
- knuckles
- diameter
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4618—Manufacturing of screening surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4672—Woven meshes
-
- 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
- D21F1/0027—Screen-cloths
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S162/00—Paper making and fiber liberation
- Y10S162/903—Paper forming member, e.g. fourdrinier, sheet forming member
Abstract
A sieve for the wet-end section of a paper machine is described, in which the sieve has been compressed by at least one of increased temperature, pressure and/or moisture.
In an embodiment, one or more of the thread inflection shape, the width of the thread floats and knuckles, the height of the thread floats and knuckles, the degree of ellipticity of the threads, the total contact area of the sieve and the void size lying between the threads is varied cross each point of the sieve's width. Such a treatment leads to a sieve which has at least one side wherein the thread floats and knuckles are reshaped and the sieve presents at least one substantially flatter surface for the production of paper. Advantageously, this process does not cause any physical damage to the surface of the sieve, as prior techniques of abrasively polishing the surface do.
In an embodiment, one or more of the thread inflection shape, the width of the thread floats and knuckles, the height of the thread floats and knuckles, the degree of ellipticity of the threads, the total contact area of the sieve and the void size lying between the threads is varied cross each point of the sieve's width. Such a treatment leads to a sieve which has at least one side wherein the thread floats and knuckles are reshaped and the sieve presents at least one substantially flatter surface for the production of paper. Advantageously, this process does not cause any physical damage to the surface of the sieve, as prior techniques of abrasively polishing the surface do.
Claims (20)
1. Single- or multilayered forming sieve for the wet end-section of a paper machine with upper machine-direction, MD, and cross-machine-direction, CMD, threads facing the paper side, and lower MD and CMD threads facing the machine, characterized in that:
at least the paper-side thread floats and knuckles (10) are reshaped by means of one or a combination of temperature, pressure and/or moisture.
at least the paper-side thread floats and knuckles (10) are reshaped by means of one or a combination of temperature, pressure and/or moisture.
2. Sieve according to claim 1, wherein, the threads (12, 13) are made of, or contain, one or more than one of a polymer such as a polyester, a polyamide or a polyolefin.
3. Sieve according to any of claims 1 or 2, wherein, the temperature lies between 100°C and 190°C
4. Sieve according to claim 3, wherein, the temperature lies between 150°C and 170°C.
5. Sieve according to any of the claims 1 to 4, wherein, the pressure lies between 10 kPa and 40 kPa.
6. Sieve according to any of the claims 1 to 5, wherein, the threads on the paper side have a diameter of between 0.09mm and 0.20mm, and the machine-side threads have a diameter of between 0.15mm and 0.30mm.
7. Sieve according to claim 6, wherein, the threads on the paper side have a diameter of 0.13mm, and the machine-side threads have a diameter of 0.18mm.
8. Sieve according to any of the claims 1 to 7, wherein, the width of the thread floats and knuckles (10) is greater than the diameter of the remainder of the thread (13), by between 5% and 15%.
9. Sieve according to any of the claims 1 to 7, wherein, the height of the thread floats and knuckles (10) is between 10% and 30% less than the diameter of the remainder of the thread (13).
10. Sieve according to claim 9, wherein, the height of the thread floats and knuckles (10) is 20% less than the diameter of the remainder of the thread (13).
11. Sieve according to any of the claims 1 to 10, wherein, the thread floats and knuckles comprise flat "thread ellipses" (11) extending approximately parallel with the plane of the sieve.
12. Sieve according to any of the claims 1 to 11, wherein, the total contact area of the sieve is about 40 to 45% of the total surface area of the sieve.
13. Sieve according to any of the claims 1 to 12, wherein, as a result of the thread inflection regions being reshaped, the void size lying between the threads (13) is reduced by between 1% and 15% from the original void size prior to inflection region reshaping.
14. Sieve according to any of the claims 1 to 13, wherein, one, or a combination of more than one, of: the thread inflection shape, the width of the thread floats and knuckles (10), the height of the thread floats and knuckles (10), the degree of ellipticity of the threads (13), the total contact area of the sieve and the void size lying between the threads (13) varies across each point of the sieve's width.
15. A method of forming a sieve for the wet end-section of a paper machine, comprising:
calendering a sieve fabric with a plurality of rollers at one, or a combination of more than one, of: temperature, pressure and/or moisture, so as to permanently reshape the thread inflection regions at least on the paper-side of the sieve.
calendering a sieve fabric with a plurality of rollers at one, or a combination of more than one, of: temperature, pressure and/or moisture, so as to permanently reshape the thread inflection regions at least on the paper-side of the sieve.
16. The method according to claim 15, wherein, at least one of the plurality of rollers is formed from a plurality of segments which can be individually adjusted to change the pressure exerted on the fabric, so that the resulting sieve has a tailored cross sectional profile across its width.
17. The method according to any of claims 15 and 16, wherein, at least one of the plurality of rollers can be heated to apply a specific heat to the sieve during processing, and the temperature can be changed along the length of the roller to apply a specific profile to the sieve.
18. The method according to any of claims 15 to 17, wherein, the pressure lies between 10 kPa and 40 kPa.
19. The method according to any of claims 15 to 18, wherein, the temperature lies between 100°C and 190°C.
20. The method according to any of claims 15 to 19, wherein, the temperature lies between 150°C and 170°C.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202004008078 | 2004-05-19 | ||
| DE202004008078.8 | 2004-05-19 | ||
| DE202004009300U DE202004009300U1 (en) | 2004-05-19 | 2004-06-11 | Dewatering belt for papermaking assembly has a gross-woven polymer gauze whose high points are flattened at high temperature and pressure |
| DE202004009300.6 | 2004-06-11 | ||
| PCT/EP2005/004787 WO2005111302A1 (en) | 2004-05-19 | 2005-05-03 | Forming sieve for the wet end section of a paper machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2566520A1 true CA2566520A1 (en) | 2005-11-24 |
| CA2566520C CA2566520C (en) | 2012-08-14 |
Family
ID=34965822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2566520A Active CA2566520C (en) | 2004-05-19 | 2005-05-03 | Forming sieve for the wet end section of a paper machine |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1751348B1 (en) |
| JP (1) | JP4650905B2 (en) |
| KR (1) | KR101114959B1 (en) |
| AU (1) | AU2005243513B2 (en) |
| BR (1) | BRPI0511194A (en) |
| CA (1) | CA2566520C (en) |
| WO (1) | WO2005111302A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012120191A1 (en) | 2011-03-04 | 2012-09-13 | Metso Fabrics Inc. | Paper machine fabric |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2182110A1 (en) * | 2008-11-03 | 2010-05-05 | Voith Patent GmbH | Method for generating a paper machine tensioner |
| JP2014208931A (en) * | 2013-03-29 | 2014-11-06 | 日本製紙株式会社 | Method for producing coated white paperboard, wire for making coated white paperboard used in the method, and coated white paperboard |
| DE102015201428A1 (en) | 2015-01-28 | 2016-07-28 | Voith Patent Gmbh | Fabric tape for the production of web material, in particular for the production of spunbonded web |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3573164A (en) * | 1967-08-22 | 1971-03-30 | Procter & Gamble | Fabrics with improved web transfer characteristics |
| FI66934C (en) * | 1977-12-30 | 1984-12-10 | Tampereen Verkatehdas Oy | FOERFARANDE FOER SLAETNING AV YTAN AV EN FILT VIRA ELLER LIKNANDE AENDLOES THERMOPLASTIC BEHANDLINGSBANA SAMT ANLAEGGNING FOER TILLAEMPNING AV DETTA FOERFARANDE |
| JPS5841992A (en) * | 1981-09-03 | 1983-03-11 | 敷島カンパス株式会社 | Papermaking fabric having smooth surface |
| DE4137984C1 (en) * | 1991-11-19 | 1992-12-17 | Thomas Josef Heimbach Gmbh & Co, 5160 Dueren, De | |
| JP3340829B2 (en) * | 1993-12-20 | 2002-11-05 | 日本フイルコン株式会社 | Hot roll press device for smoothing the surface of endless belt and heat setting method using this press device |
| CA2153846A1 (en) * | 1995-06-28 | 1996-12-29 | Hippolit Gstrein | Process for producing a papermakers' fabric with a smooth surface |
| JP2002020989A (en) * | 2000-06-30 | 2002-01-23 | Nippon Felt Co Ltd | Woven fabric for papermaking and method for producing the same |
| US7514030B2 (en) * | 2002-12-30 | 2009-04-07 | Albany International Corp. | Fabric characteristics by flat calendering |
-
2005
- 2005-05-03 KR KR1020067024045A patent/KR101114959B1/en active IP Right Grant
- 2005-05-03 CA CA2566520A patent/CA2566520C/en active Active
- 2005-05-03 EP EP05736013A patent/EP1751348B1/en active Active
- 2005-05-03 AU AU2005243513A patent/AU2005243513B2/en active Active
- 2005-05-03 JP JP2007517015A patent/JP4650905B2/en active Active
- 2005-05-03 BR BRPI0511194-3A patent/BRPI0511194A/en not_active Application Discontinuation
- 2005-05-03 WO PCT/EP2005/004787 patent/WO2005111302A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012120191A1 (en) | 2011-03-04 | 2012-09-13 | Metso Fabrics Inc. | Paper machine fabric |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005111302A1 (en) | 2005-11-24 |
| AU2005243513A1 (en) | 2005-11-24 |
| CA2566520C (en) | 2012-08-14 |
| JP2007538164A (en) | 2007-12-27 |
| AU2005243513B2 (en) | 2009-11-12 |
| KR20070044806A (en) | 2007-04-30 |
| BRPI0511194A (en) | 2008-01-22 |
| EP1751348B1 (en) | 2012-11-14 |
| JP4650905B2 (en) | 2011-03-16 |
| EP1751348A1 (en) | 2007-02-14 |
| KR101114959B1 (en) | 2012-03-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |