EP0259294A1 - Double-layer cloth for a paper making machine - Google Patents
Double-layer cloth for a paper making machine Download PDFInfo
- Publication number
- EP0259294A1 EP0259294A1 EP87890161A EP87890161A EP0259294A1 EP 0259294 A1 EP0259294 A1 EP 0259294A1 EP 87890161 A EP87890161 A EP 87890161A EP 87890161 A EP87890161 A EP 87890161A EP 0259294 A1 EP0259294 A1 EP 0259294A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- threads
- weft threads
- weft
- diameter
- warp
- 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.)
- Withdrawn
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Classifications
-
- 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
- D21F1/0036—Multi-layer screen-cloths
Definitions
- the aim of the invention is to increase the abrasion volume of the lower layer on the one hand and to improve drainage and retention on the other hand.
- the goal is achieved in that two wefts of the upper layer are each assigned to a weft thread of a larger diameter of the lower layer.
- the thickness of the lower weft threads can be 50 to 100% greater than that of the upper weft threads, the diameter of which is approximately in the order of the warp thread.
- Fabrics according to the invention can be produced with five to seventeen-shaft weaves.
- An important characteristic of these fabrics is that the chain passes only once under a weft of the lower layer in the course of a repeat, so that the weft threads float for a long time have on the barrel side to obtain the necessary volume of abrasion.
- the properties necessary for sheet formation it can be designed with increased orientation in the warp or weft direction.
- the generally possible course of the warp threads 1 is shown in FIG. 1.
- the wefts of the upper layer are denoted by 2, those of the lower layer by 3.
- Group (7) is to be regarded as a fixed point, where the warp thread 1 runs under the weft thread 3 of the lower layer for tying.
- the course in the area of groups 1 to 6 can have essentially all possible variations above or below the threads 2 of the upper layer.
- Preferred design options are those in which the warp threads 1 run over two to five weft threads 2 of the upper thread family.
- the aim is to achieve the most monoplane possible design, in which the uppermost points of these threads touch a common plane.
- Fig. 4 it can be seen that the proportion of the support on the weft threads is approximately equal to that on the warp threads, which is a preferred embodiment especially for marking-sensitive papers.
- Such a fabric can be produced with 62 warp threads / cm, diameter 0.17 mm and 40 weft threads / cm, diameter 0.17 mm, the top layer and 20 weft threads / cm, diameter 0.30 mm, the bottom layer.
- FIG. 5 course of the warp thread
- FIG. 6 carrier
- FIG. 7 contact image of the paper side
- the number of warp threads and the diameter are the same as in example 1.
- the number of wefts here is 46 cm alternately with diameters 0.17 mm and 0.14 mm.
- the warp thread 1 here runs over five weft threads 2 of the upper layer.
- 9 and 10 again show the cartridge and contact image of the paper side.
- This version shows a stronger warp floatation and is particularly suitable for kraft papers.
- An exemplary embodiment is 44 threads / cm in the warp 0, 23, 30 weft threads 0, 23 in the upper layer, 15 weft threads 0, 40 mm in the lower layer.
Abstract
Description
Es ist bekannt, daß man bei zweilagigen Sieben mit einer Gruppe von Kettfäden zwei Schußfadengruppen abbindet, wobei die korrespondierenden Einzelfäden dieser Gruppen jeweils möglichst übereinander liegen sollen. Der Nachteil dieser Bindungsart liegt darin, daß die Schußfäden der unteren Lage im Durchmesser etwa gleich oder nur geringfügig größer als die der oberen Lage sind, da sonst keine ausreichende Verformung bei der Thermofixierung erreicht wird und dann die unteren Schußfäden zu wenig über die Kettfäden vorstehen. Als Folge ergibt sich, daß das zur Verfügung stehende Abriebvolumen dieser Bindungsart begrenzt ist.It is known that in two-ply sieves two groups of weft threads are tied with a group of warp threads, the corresponding individual threads of these groups being intended to lie one above the other as far as possible. The disadvantage of this type of binding is that the wefts of the lower layer are approximately the same or only slightly larger in diameter than those of the upper layer, since otherwise sufficient deformation is not achieved during the heat setting and then the lower wefts protrude too little over the warp threads. As a result, the abrasion volume available for this type of bond is limited.
Weiters treten bei dieser Bindung im Verlaufe des freien Volumens über die Siebstärke zwei Engpässe auf, sodaß die Entwässerungsverhältnisse von der idealen Anordnung abweichen.Furthermore, two bottlenecks occur in the course of the free volume over the sieve thickness, so that the drainage conditions deviate from the ideal arrangement.
Ziel der Erfindung ist es, einerseits das Abriebvolumen der unteren Lage zu erhöhen, anderseits die Entwässerung und Retention zu verbessern. Das Ziel wird dadurch erreicht, daß jeweils zwei Schußfäden der oberen Lage einem mit einem stärkeren Durchmesser ausgebildeten Schußfaden der unteren Lage zugeordnet sind. Dabei kann die Stärke der unteren Schußfäden um 50 bis 100% größer sein, als die der oberen Schußfäden, deren Durchmesser etwa in der Größenordnung des Kettfadens liegt.The aim of the invention is to increase the abrasion volume of the lower layer on the one hand and to improve drainage and retention on the other hand. The goal is achieved in that two wefts of the upper layer are each assigned to a weft thread of a larger diameter of the lower layer. The thickness of the lower weft threads can be 50 to 100% greater than that of the upper weft threads, the diameter of which is approximately in the order of the warp thread.
Erfindungsgemäße Gewebe können mit fünf- bis siebzehnschäftigen Bindungen hergestellt werden. Ein wesentliches Kennzeichen dieser Gewebe ist, daß die Kette im Verlauf eines Rapportes nur einmal unter einem Schuß der unteren Lage durchgeht, sodaß die Schußfäden lange Flottierun gen an der Laufseite aufweisen, um das notwendige Abriebvolumen zu erhalten. Um der Sieboberseite die für die Blattbildung notwendigen Eigenschaften zu verleihen, kann diese mit verstärkter Orientierung in Kett- oder Schußrichtung ausgebildet werden.Fabrics according to the invention can be produced with five to seventeen-shaft weaves. An important characteristic of these fabrics is that the chain passes only once under a weft of the lower layer in the course of a repeat, so that the weft threads float for a long time have on the barrel side to obtain the necessary volume of abrasion. In order to give the top of the screen the properties necessary for sheet formation, it can be designed with increased orientation in the warp or weft direction.
Am Beispiel eines siebenschäftigen Gewebes sollen nun mögliche Aufbauvarianten dargelegt werden:
In Fig. 1 ist der allgemein mögliche Verlauf der Kettfäden 1 dargestellt. Die Schußfäden der oberen Lage sind mit 2, die der unteren Lage mit 3 bezeichnet. Als Fixpunkt ist die Gruppe (7) anzusehen, wo der Kettfaden 1 unter dem Schußfaden 3 der unteren Lage zur Abbindung verläuft. Im weiteren kann der Verlauf im Bereich der Gruppen 1 bis 6 im wesentlichen alle Variationsmöglichkeiten über oder unter den Fäden 2 der oberen Lage aufweisen. Bevorzugte Ausführungsmöglichkeiten sind jene, bei denen die Kettfäden 1 über zwei bis fünf Schußfäden 2 der oberen Fadenschar verlaufen.Using the example of a seven-strand fabric, possible construction variants are now to be explained:
The generally possible course of the
Es soll dabei eine möglichst monoplane Ausführung erzielt werden, bei der die obersten Punkte dieser Fäden eine gemeinsame Ebene berühren.The aim is to achieve the most monoplane possible design, in which the uppermost points of these threads touch a common plane.
Bei diesem Beispiel verläuft der Kettfaden 1 vorerst über drei, dann unter drei und schließlich über zwei Schußfäden 2 der oberen Lage.
- Fig. 2 zeigt den Verlauf des Kettfadens,
- Fig. 3 die Patrone der Bindung und
- Fig. 4 das Kontakbild der Papierseite.
- 2 shows the course of the warp thread,
- Fig. 3, the cartridge of the bond and
- Fig. 4 shows the contact picture of the paper side.
Aus Fig. 4 ist ersichtlich, daß der Anteil der Auflage auf den Schußfäden etwa gleich dem auf den Kettfäden ist, was vor allem für markierungsempfindliche Papiere eine bevorzugte Ausführungsform darstellt. Ein solches Gewebe kann mit 62 Kettfäden/cm, Durchmesser 0,17 mm und 40 Schußfäden/cm, Durchmesser o,17 mm, der oberen Lage und 20 Schußfäden/cm, Durchmeser o,30 mm, der unteren Lage hergestellt werden.From Fig. 4 it can be seen that the proportion of the support on the weft threads is approximately equal to that on the warp threads, which is a preferred embodiment especially for marking-sensitive papers. Such a fabric can be produced with 62 warp threads / cm, diameter 0.17 mm and 40 weft threads / cm, diameter 0.17 mm, the top layer and 20 weft threads / cm, diameter 0.30 mm, the bottom layer.
Eine andere Ausführungsform zeigt Fig. 5 (Verlauf des Kettfadens) Fig. 6 (Patrone) und Fig. 7 (Kontaktbild der Papierseite), wobei der Kettfaden 1 einmal über drei Schußfäden 2 geführt wird. Hier ergibt sich vorwiegend eine Querflottierung an der Papierseite, die vor allem eine gute Retention und Abnahme des Papieres bewirkt. Die Kettfadenzahl und der Durchmesser sind gleich wie im Beispiel 1. Die Schußzahl beträgt hier 46 cm abwechselnd mit Durchmesser o,17 mm und o,14 mm.Another embodiment is shown in FIG. 5 (course of the warp thread), FIG. 6 (cartridge) and FIG. 7 (contact image of the paper side), the
Gemäß Fig. 8 verläuft hier der Kettfaden 1 über fünf Schußfäden 2 der oberen Lage. Die Fig. 9 und 10 zeigen wieder Patrone und Kontaktbild der Papierseite. Diese Ausführung zeigt eine stärkere Kettflottierung und ist vor allem für Kraftpapiere geeignet. Ein Ausführungsbeispiel sei 44 Fäden/cm in der Kette 0 o,23, 30 Schußfäden 0 o,23 in der oberen Lage, 15 Schußfäden 0 o,40 mm in der unteren Lage.8, the
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT210386A AT385533B (en) | 1986-08-04 | 1986-08-04 | TWO-LAYER PAPER MACHINE SCREEN |
AT2103/86 | 1986-08-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0259294A1 true EP0259294A1 (en) | 1988-03-09 |
Family
ID=3527815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87890161A Withdrawn EP0259294A1 (en) | 1986-08-04 | 1987-07-07 | Double-layer cloth for a paper making machine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0259294A1 (en) |
AT (1) | AT385533B (en) |
FI (1) | FI88529C (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0345643A3 (en) * | 1988-06-09 | 1991-08-28 | Nippon Filcon Co., Ltd. | Weft-wear type papermarkers' fabric |
WO1996007789A2 (en) * | 1994-09-03 | 1996-03-14 | Scapa Group Plc | Papermakers fabric |
US5975148A (en) * | 1990-06-06 | 1999-11-02 | Asten, Inc. | Papermakers fabric with stacked machine direction yarns forming outer floats and inner knuckles |
WO2004048684A1 (en) * | 2002-11-21 | 2004-06-10 | Albany International Corp. | Multi-layered forming fabric with a top layer of twinned wefts and an extra middle layer of wefts |
DE102012207044A1 (en) * | 2012-04-27 | 2013-10-31 | Voith Patent Gmbh | forming fabric |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105442376B (en) * | 2015-11-18 | 2017-09-12 | 安徽华辰造纸网股份有限公司 | A kind of crescent paper machine dewatering net |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3067779A (en) * | 1960-02-04 | 1962-12-11 | Draper Brothers Company | Electroconductive papermaker's felt |
US4382987A (en) * | 1982-07-30 | 1983-05-10 | Huyck Corporation | Papermaker's grooved back felt |
EP0117856A1 (en) * | 1983-02-23 | 1984-09-05 | Nordiskafilt Ab | Forming fabric of double-layer type |
EP0144530A2 (en) * | 1983-08-17 | 1985-06-19 | Hermann Wangner GmbH & Co. KG | Screen-cloth for a paper-making machine |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE397371C (en) * | 1976-02-24 | 1980-08-07 | Nordiska Maskinfilt Ab | PREPARATION VIRUS FOR PAPER, CELLULOSA OR SIMILAR MACHINES |
-
1986
- 1986-08-04 AT AT210386A patent/AT385533B/en not_active IP Right Cessation
-
1987
- 1987-07-07 EP EP87890161A patent/EP0259294A1/en not_active Withdrawn
- 1987-08-03 FI FI873368A patent/FI88529C/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3067779A (en) * | 1960-02-04 | 1962-12-11 | Draper Brothers Company | Electroconductive papermaker's felt |
US4382987A (en) * | 1982-07-30 | 1983-05-10 | Huyck Corporation | Papermaker's grooved back felt |
EP0117856A1 (en) * | 1983-02-23 | 1984-09-05 | Nordiskafilt Ab | Forming fabric of double-layer type |
EP0144530A2 (en) * | 1983-08-17 | 1985-06-19 | Hermann Wangner GmbH & Co. KG | Screen-cloth for a paper-making machine |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0345643A3 (en) * | 1988-06-09 | 1991-08-28 | Nippon Filcon Co., Ltd. | Weft-wear type papermarkers' fabric |
US5103875A (en) * | 1988-06-09 | 1992-04-14 | Nippon Filcon Co., Ltd. | Weft-wear papermaker's fabric with short and long weft crimps |
US5975148A (en) * | 1990-06-06 | 1999-11-02 | Asten, Inc. | Papermakers fabric with stacked machine direction yarns forming outer floats and inner knuckles |
US6189577B1 (en) | 1990-06-06 | 2001-02-20 | Astenjohnson, Inc. | Papermakers fabric with stacked machine direction yarns |
WO1996007789A2 (en) * | 1994-09-03 | 1996-03-14 | Scapa Group Plc | Papermakers fabric |
WO1996007789A3 (en) * | 1994-09-03 | 1996-05-30 | Scapa Group Plc | Papermakers fabric |
WO2004048684A1 (en) * | 2002-11-21 | 2004-06-10 | Albany International Corp. | Multi-layered forming fabric with a top layer of twinned wefts and an extra middle layer of wefts |
DE102012207044A1 (en) * | 2012-04-27 | 2013-10-31 | Voith Patent Gmbh | forming fabric |
CN104285004A (en) * | 2012-04-27 | 2015-01-14 | 福伊特专利公司 | Forming fabric |
CN104285004B (en) * | 2012-04-27 | 2016-09-28 | 福伊特专利公司 | Forming net |
Also Published As
Publication number | Publication date |
---|---|
FI88529B (en) | 1993-02-15 |
FI88529C (en) | 1993-05-25 |
ATA210386A (en) | 1987-09-15 |
AT385533B (en) | 1988-04-11 |
FI873368A0 (en) | 1987-08-03 |
FI873368A (en) | 1988-02-05 |
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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 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE CH DE FR GB IT LI NL SE |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 19880910 |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: KOVAR, WALTER, DR. |