EP0126943B1 - Toile de formation à plusieurs couches pour la partie humide d'une machine à papier - Google Patents
Toile de formation à plusieurs couches pour la partie humide d'une machine à papier Download PDFInfo
- Publication number
- EP0126943B1 EP0126943B1 EP84104291A EP84104291A EP0126943B1 EP 0126943 B1 EP0126943 B1 EP 0126943B1 EP 84104291 A EP84104291 A EP 84104291A EP 84104291 A EP84104291 A EP 84104291A EP 0126943 B1 EP0126943 B1 EP 0126943B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fabric
- paper machine
- forming screen
- lower fabric
- wet end
- 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.)
- Expired
Links
Images
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 invention relates to a two-layer forming fabric consisting of upper fabric and lower fabric for the wet end of a paper machine.
- Papermaker's fabrics of this type always have a single-layer bottom fabric as wear fabric, which in practice is usually woven in a single weave or in a cross-weave. Such a wear fabric cannot be made as rough as desired, because otherwise its structure will appear on the forming side of the upper fabric and thus lead to markings in the paper. However, this limits the stability of such screens and their service life.
- the invention has for its object a screen of the type mentioned, the sheet formation side consists of a simple, non-marking fabric made of fine yarn, while the fabric on the running side be wear-resistant and of high longitudinal and transverse stability and for the purpose of coarse threads should exist in such a way that the coarse lower fabric does not appear on the sheet formation side. Furthermore, drainage impulses in the tissue are to be strongly dampened.
- the warp density of the lower fabric is greater than 8.
- the warp density is calculated from the diameter of the warp thread and the number of warp threads per centimeter, multiplied by a factor of 10.
- a particularly preferred embodiment of the forming fabric according to the invention is obtained when the lower fabric is woven in a multi-layer weave, with which an exceptionally high longitudinal and transverse stability is achieved, which has hitherto only been achieved by metal fabrics.
- the high warp density of more than 8 of the wearing fabric also leads to very high retention values with sufficient drainage performance, and the high volume of the wearing fabric offers the further advantage that the drainage impulses are strongly damped and paper of the same high quality can be produced as before was not possible.
- a 1 x 1 weave upper fabric 10 made of relatively fine warp threads 11 and weft threads 12 is connected to a lower fabric 20, which is woven in two layers, its warp thread 21 with a strong, wear-bearing lower weft thread 22 and one in the top layer of the Underlying 20 lying, thinner weft 23 is woven.
- the binding of the two-ply lower fabric 20 is selected so that the paper machine screen is designed as a weft runner and has a very stable wear side.
- the upper and lower fabrics 10, 20 are connected to one another with the aid of individual weft threads 23 of the upper layer of the lower fabric 20, which are interwoven at greater distances with individual warp threads 11 of the upper fabric.
- the binding points can be arranged in such a way that they practically do not appear on the paper.
- Figures 1 and 2 also show that the lower fabric 20 has a high warp density (Fig. 2) and this fact in connection with the high volume leads to a strong damping of the drainage impulses and thus to high paper quality.
- FIG. 3 shows a further exemplary embodiment of the forming fabric according to the invention, the position of the cutting plane through the fabric in FIG. 3 corresponding to that in FIG. 2.
- the upper fabric 30 of the paper machine screen according to FIG. 3 and the lower layer of the two-layer lower fabric 40 do not differ from the fabric described first.
- the upper fabric has a very uniform 1x1 weave with warp 31 and weft 32, while a strong weft thread 42, which carries the wear, is interwoven with the warp threads 41 of the lower fabric lying very close together, so that a very wear-resistant weft runner is produced.
- the weft 43 of the upper layer of the lower fabric 40 is not connected to the upper fabric 30.
- the bond between the two-ply lower fabric 40 and the upper fabric 30 is produced by a separate weft 44, which is interwoven with individual warp threads of the upper fabric and warp threads 41 of the lower fabric 40 at those locations where the latter are cranked over the weft thread 43 of the upper layer of the lower fabric .
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84104291T ATE35705T1 (de) | 1983-05-25 | 1984-04-16 | Mehrlagiges formiersieb fuer die nasspartie einer papiermaschine. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833318960 DE3318960A1 (de) | 1983-05-25 | 1983-05-25 | Mehrlagiges formiersieb fuer die nasspartie einer papiermaschine |
DE3318960 | 1983-05-25 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0126943A2 EP0126943A2 (fr) | 1984-12-05 |
EP0126943A3 EP0126943A3 (en) | 1985-06-19 |
EP0126943B1 true EP0126943B1 (fr) | 1988-07-13 |
Family
ID=6199841
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84104291A Expired EP0126943B1 (fr) | 1983-05-25 | 1984-04-16 | Toile de formation à plusieurs couches pour la partie humide d'une machine à papier |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0126943B1 (fr) |
AT (1) | ATE35705T1 (fr) |
DE (2) | DE3318960A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7581567B2 (en) | 2006-04-28 | 2009-09-01 | Weavexx Corporation | Papermaker's forming fabric with cross-direction yarn stitching and ratio of top machine direction yarns to bottom machine direction yarns of 2:3 |
US20090183795A1 (en) | 2008-01-23 | 2009-07-23 | Kevin John Ward | Multi-Layer Papermaker's Forming Fabric With Long Machine Side MD Floats |
US7766053B2 (en) | 2008-10-31 | 2010-08-03 | Weavexx Corporation | Multi-layer papermaker's forming fabric with alternating paired and single top CMD yarns |
US8251103B2 (en) | 2009-11-04 | 2012-08-28 | Weavexx Corporation | Papermaker's forming fabric with engineered drainage channels |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1994280A (en) * | 1932-04-21 | 1935-03-12 | Hindle Thomas | Drier felt for use on paper making machines |
US2047610A (en) * | 1933-09-21 | 1936-07-14 | William A Barrell | Drier felt for paper machines and the like |
US2854032A (en) * | 1953-08-20 | 1958-09-30 | William E Hooper And Sons Comp | Dryer felt |
US4314589A (en) * | 1978-10-23 | 1982-02-09 | Jwi Ltd. | Duplex forming fabric |
DE3224187C2 (de) * | 1982-06-29 | 1989-01-12 | Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen | Verband-Gewebe als Bespannung für den Blattbildungsbereich einer Papiermaschine |
-
1983
- 1983-05-25 DE DE19833318960 patent/DE3318960A1/de not_active Withdrawn
-
1984
- 1984-04-16 DE DE8484104291T patent/DE3472693D1/de not_active Expired
- 1984-04-16 EP EP84104291A patent/EP0126943B1/fr not_active Expired
- 1984-04-16 AT AT84104291T patent/ATE35705T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE3318960A1 (de) | 1984-11-29 |
DE3472693D1 (en) | 1988-08-18 |
EP0126943A2 (fr) | 1984-12-05 |
ATE35705T1 (de) | 1988-07-15 |
EP0126943A3 (en) | 1985-06-19 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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AK | Designated contracting states |
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Effective date: 19851129 |
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Owner name: F. OBERDORFER GMBH & CO. KG INDUSTRIEGEWEBE-TECHNI |
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Effective date: 19870123 |
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