EP0425523A1 - Papermaker's fabrics. - Google Patents

Papermaker's fabrics.

Info

Publication number
EP0425523A1
EP0425523A1 EP89907232A EP89907232A EP0425523A1 EP 0425523 A1 EP0425523 A1 EP 0425523A1 EP 89907232 A EP89907232 A EP 89907232A EP 89907232 A EP89907232 A EP 89907232A EP 0425523 A1 EP0425523 A1 EP 0425523A1
Authority
EP
European Patent Office
Prior art keywords
fabric
papermaker
loops
fold regions
machine direction
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
Application number
EP89907232A
Other languages
German (de)
French (fr)
Other versions
EP0425523B1 (en
Inventor
Paul Louis Sudre
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.)
Scapa Group Ltd
Original Assignee
Scapa Group Ltd
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.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10638876&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0425523(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Scapa Group Ltd filed Critical Scapa Group Ltd
Publication of EP0425523A1 publication Critical patent/EP0425523A1/en
Application granted granted Critical
Publication of EP0425523B1 publication Critical patent/EP0425523B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

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
    • 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
    • D21F1/0054—Seams thereof

Definitions

  • PAPERMAKER'S FABRICS The invention concerns papermaker's fabrics and has more particular reference to a method for the manufacture of a seamed endless structure for use as papermachine clothing or as a base material therein.
  • the warp yarns in the weaving loom extend in the machine direction of the eventual papermaker's fabric, and the fabric is made endless by, for example, weaving weft-free warp yarns at the respective fabric ends back into the fabric to form warp loops thereat which extend in the machine direction and by introducing a pintle wire into the tunnel formed by the interdigitated loops of the respective fabric ends thereby to join such ends.
  • the warp yarns in the loom are the cross-machine direction yarns of the papermaker's fabric.
  • the method comprising the steps of providing a fabric of plural, superimposed layer configuration throughout substantially the full longitudinal extent thereof and having fold regions at the respective opposite ends thereof, and removing cross- machine direction yarns from said fold regions to leave machine-direction loops thereat.
  • the superimposed fabric layers are two in number.
  • the superimposed fabric layers are defined by a laid-flat fabric of endless-woven configuration.
  • a textile batt is needled to at least one side of the endless base material.
  • the loops of the respective fold regions may be brought into mutual interdigitated relationship directly to receive a pintle wire in the tunnel formed thereby, thus to form a seam or may be engaged with a spiral coil itself intended to form the seam or a part thereof.
  • the invention also includes a papermaker's fabric or base fabric therefor made in accordance with the method as aforesaid.
  • FIG. 1 to 3 respectively show successive stages in the production of an endless base material for use in a papermaker ' s fabric and comprising a flat-woven single layer structure;
  • Fig. 4 is a view corresponding to Fig. 3 and shows an endless-woven base structure having machine direction loops provided therein in accordance with the invention
  • Figs. 4A and 4B are enlarged sections taken longitudinally of the structure shown in Fig. 4 at locations A and B, respectively;
  • Fig. 5 shows the seam region of base fabrics of the kind shown in Figs. 1 to 3 and Fig. 4, a textile batt having been applied to each face thereof.
  • a base material for use in the manufacture of a papermaker's wet felt comprises a flat- woven fabric 11 of open weave construction having a length approximately equal to twice the length of the intended end product, that is to say of the papermachine clothing.
  • the free ends 12, 13 are folded over to define a two-ply structure having fold regions 15, 16, the free ends being brought into substantial abutment as shown in Fig. 2.
  • the free ends 12, 13 of the initial flat-woven fabric 11 are sewn to the adjacent fabric ply 21, as at 22 in Fig. 2, whilst the two fabric plies 21, 23 are stitched together in fold regions 15, 16 in closely spaced disposition relative to the loops 17, 18, as is shown at 24.
  • Figs. 4, 4A and 4B in which like reference numerals to those of Figs. 1 to 3 are used for the same or similar parts, an endless-woven fabric is laid flat, and the fold regions 15, 16 between the resultant overlying plies thereof are brought together as shown in Fig. 4.
  • Cross-machine direction yarns that is to say warp yarns in the loom, are removed from the fold regions to give outwardly extending loops 17, 18 as before, the plies being sewn together in closely spaced disposition relative to the loops, as at 24.
  • the structure On interdigitation of loops 17, 18 and the insertion of a pintle wire, the structure is brought back into endless form.
  • machine direction yarns In the event that the machine direction yarns are to form loops at the respective fabric ends for interdigitation and receipt of a pintle wire, such machine direction yarns will ordinarily comprise monofilament yarns. However, if spiral coils are to be applied to the weft free zones and the spirals at the respective fabric ends, rather than machine direction yarn loops, are interdigitated to receive a pintle wire, ⁇ then such machine direction yarns may, for example,
  • the cross-machine direction yarns may take the form of, for example, monofilament, cabled monofilament or multifilament yarns.
  • a textile batt 25 is needled to each face of the endless structure, 10 be it a structure in accordance with the principles of Figs. 1 to 3 or of Figs. 4, 4A and 4B, the needled batt being slit in register with the seam at the paper side, as at 26, and cleared in relation to the seam at the machine side, as at 27, to provide access thereto.
  • the 15 needling operation brings the batt at each face into coherent and homogeneous form through the base structure, and serves also to secure the individual plies of such base structure together.
  • the invention is concerned primarily with the 20 production of a base structure for combination with a textile batt in the manufacture of a wet end fabric, it is to be understood that the invention is also of relevance to the production of a two-ply papermaker's fabric comprising a flat-woven or an endless-woven 25 structure brought into endless form in accordance with the method herein disclosed.
  • the free ends may be secured together, and, if required, to the adjacent ply at the inner face of the eventual papermaker's fabric, by removing cross-machine direction yarns at such ends, interdigitating the fringed-out machine direction yarns and securing those yarns together by means of a thermosensitive adhesive film or tape interposed between the fringed-out ends and the adjacent ply and activated in appropriate manner.
  • the ends may be secured to the fabric ply by employing a powder bonding technique or by sewing.
  • overlying fabric plies are said to be sewn together adjacent the loops and in the region of the abutting fabric ends. It is to be understood that such plies may also be sewn together at any other position or positions intermediate the loops.

Landscapes

  • Paper (AREA)
  • Sanitary Thin Papers (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)

Abstract

A method for the manufacture of a papermaker's fabric is proposed which involves the provision of a multiply fabric having fold regions (15, 16) at its respective ends and the removal of cross-machine direction yarns (14) in such fold regions thereby to create seam-forming loops (17, 18). The loops (17, 18) may be interdigitated directly to receive a pintle wire into engagement therewith and thus form a seam, or may receive a spiral for seam-forming purposes. The method is of application to flat-woven or endless woven structures, and is of use in the manufacture not only of papermaker's fabrics per se but also in the manufacture of base materials for use therein.

Description

PAPERMAKER'S FABRICS The invention concerns papermaker's fabrics and has more particular reference to a method for the manufacture of a seamed endless structure for use as papermachine clothing or as a base material therein.
There are two basic methods whereby papermakers ' fabrics are produced, either the fabric is woven "flat", and the free ends joined, or the fabric is woven
"endless". In the case of the "flat-woven" fabric the warp yarns in the weaving loom extend in the machine direction of the eventual papermaker's fabric, and the fabric is made endless by, for example, weaving weft-free warp yarns at the respective fabric ends back into the fabric to form warp loops thereat which extend in the machine direction and by introducing a pintle wire into the tunnel formed by the interdigitated loops of the respective fabric ends thereby to join such ends.
In the "endless-woven" fabric the warp yarns in the loom are the cross-machine direction yarns of the papermaker's fabric.
According to the invention there is ' proposed a method for the manufacture of a papermaker's fabric or of a base material for use therein, the method comprising the steps of providing a fabric of plural, superimposed layer configuration throughout substantially the full longitudinal extent thereof and having fold regions at the respective opposite ends thereof, and removing cross- machine direction yarns from said fold regions to leave machine-direction loops thereat. According to a preferred feature, the superimposed fabric layers are two in number.
According to a further preferred feature, the superimposed fabric layers are defined by a laid-flat fabric of endless-woven configuration. According to a still further preferred feature, a textile batt is needled to at least one side of the endless base material.
The loops of the respective fold regions may be brought into mutual interdigitated relationship directly to receive a pintle wire in the tunnel formed thereby, thus to form a seam or may be engaged with a spiral coil itself intended to form the seam or a part thereof.
The invention also includes a papermaker's fabric or base fabric therefor made in accordance with the method as aforesaid.
The invention will now be described further, by way of example only, with reference to the accompanying diagrammatic drawings illustrating two embodiments thereof, and in which:- Figs. 1 to 3 respectively show successive stages in the production of an endless base material for use in a papermaker ' s fabric and comprising a flat-woven single layer structure;
Fig. 4 is a view corresponding to Fig. 3 and shows an endless-woven base structure having machine direction loops provided therein in accordance with the invention;
Figs. 4A and 4B are enlarged sections taken longitudinally of the structure shown in Fig. 4 at locations A and B, respectively; and
Fig. 5 shows the seam region of base fabrics of the kind shown in Figs. 1 to 3 and Fig. 4, a textile batt having been applied to each face thereof.
Referring now to the drawings, and particularly to Figs. 1 to 3 thereof, a base material for use in the manufacture of a papermaker's wet felt comprises a flat- woven fabric 11 of open weave construction having a length approximately equal to twice the length of the intended end product, that is to say of the papermachine clothing. The free ends 12, 13 are folded over to define a two-ply structure having fold regions 15, 16, the free ends being brought into substantial abutment as shown in Fig. 2.
Weft yarns 14 are removed from the fold regions 15,
16 either before or after folding, to give loops 17, 18 extending outwardly therefrom, the two-ply structure being brought into endless form by the interdigitation of such loops and the introduction of a pintle wire 19 into the tunnel 20 formed thereby as is shown in Fig. 3.
The free ends 12, 13 of the initial flat-woven fabric 11 are sewn to the adjacent fabric ply 21, as at 22 in Fig. 2, whilst the two fabric plies 21, 23 are stitched together in fold regions 15, 16 in closely spaced disposition relative to the loops 17, 18, as is shown at 24.
In a second embodiment, see now Figs. 4, 4A and 4B, in which like reference numerals to those of Figs. 1 to 3 are used for the same or similar parts, an endless-woven fabric is laid flat, and the fold regions 15, 16 between the resultant overlying plies thereof are brought together as shown in Fig. 4. Cross-machine direction yarns, that is to say warp yarns in the loom, are removed from the fold regions to give outwardly extending loops 17, 18 as before, the plies being sewn together in closely spaced disposition relative to the loops, as at 24. On interdigitation of loops 17, 18 and the insertion of a pintle wire, the structure is brought back into endless form.
In the event that the machine direction yarns are to form loops at the respective fabric ends for interdigitation and receipt of a pintle wire, such machine direction yarns will ordinarily comprise monofilament yarns. However, if spiral coils are to be applied to the weft free zones and the spirals at the respective fabric ends, rather than machine direction yarn loops, are interdigitated to receive a pintle wire, } then such machine direction yarns may, for example,
'J comprise cabled yarns or ultifilament yarns. 5 The cross-machine direction yarns may take the form of, for example, monofilament, cabled monofilament or multifilament yarns.
In producing a wet felt, see now Fig. 5, a textile batt 25 is needled to each face of the endless structure, 10 be it a structure in accordance with the principles of Figs. 1 to 3 or of Figs. 4, 4A and 4B, the needled batt being slit in register with the seam at the paper side, as at 26, and cleared in relation to the seam at the machine side, as at 27, to provide access thereto. The 15 needling operation brings the batt at each face into coherent and homogeneous form through the base structure, and serves also to secure the individual plies of such base structure together.
Whilst the invention is concerned primarily with the 20 production of a base structure for combination with a textile batt in the manufacture of a wet end fabric, it is to be understood that the invention is also of relevance to the production of a two-ply papermaker's fabric comprising a flat-woven or an endless-woven 25 structure brought into endless form in accordance with the method herein disclosed. In the case of a flat-woven structure, the free ends may be secured together, and, if required, to the adjacent ply at the inner face of the eventual papermaker's fabric, by removing cross-machine direction yarns at such ends, interdigitating the fringed-out machine direction yarns and securing those yarns together by means of a thermosensitive adhesive film or tape interposed between the fringed-out ends and the adjacent ply and activated in appropriate manner. Alternatively, the ends may be secured to the fabric ply by employing a powder bonding technique or by sewing.
As will readily be appreciated, in the case of a flat-woven structure requisite lengths of base fabric woven in any desired weave patern may be cut from a stock supply thereof, and a papermaker's fabric meeting the particular requirements of its intended end use as regards performance characteristics can be produced from that base fabric in a simple and ready manner.
In the embodiment herein illustrated the overlying fabric plies are said to be sewn together adjacent the loops and in the region of the abutting fabric ends. It is to be understood that such plies may also be sewn together at any other position or positions intermediate the loops.
The invention is not restricted to the specific structures herein set forth, since alternatives will readily present themselves to one skilled in the art. Thus, not only is the invention of relevance to different weave structures, but in the case of fiat woven structures the ends thereof, for example ends 12, 13 in Fig. 2, may be joined together as by a spiral beam or in any other manner.

Claims

Claims
1. A method for the manufacture of a papermaker's fabric or of a base material for use therein, comprising the steps of providing a fabric of plural, superimposed layer configuration throughout substantially the full longitudinal extent thereof and having fold regions at the respective opposite ends thereof, and removing cross- machine direction yarns from said fold regions to leave machine-direction loops thereat.
2. The method as claimed in claim 1, including the further step of securing the superimposed layers together, at least at positions adjacent the loops.
3. The method as claimed in claim 1 or 2, wherein the superimposed layers are two in number.
4. The method as claimed in claim 3, which includes the steps of flattening an endless woven fabric and removing cross-machine direction yarns from the fold regions thereof to form loops thereat.
5. The method as claimed in claim 3 , which includes the steps of bringing a flat-woven structure into plural layer configuration to define fold regions at the respective opposite ends thereof and removing cross-machine direction yarns from said fold regions to form loops thereat.
6. The method as claimed in any one of the preceding claims, including the further step of securing a respective spiral coil to the loops at the fabric ends.
7. The method as claimed in any one of the preceding claims, including the further step of needling a textile batt to one face at least of the plural layer structure.
8. A papermaker's fabric produced in accordance with the method claimed in any one of the preceding claims.
9. A base material for use in a papermaker's fabric produced in accordance with the method claimed in any one of claims 1 to 6.
10. The method for the manufacture of a papermaker's fabric or a base material for use therein, substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
11. A papermaker's fabric or a base material for use therein, substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
EP89907232A 1988-06-17 1989-06-16 Papermaker's fabrics Revoked EP0425523B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB8814436 1988-06-17
GB888814436A GB8814436D0 (en) 1988-06-17 1988-06-17 Papermachine clothing
PCT/GB1989/000681 WO1989012717A1 (en) 1988-06-17 1989-06-16 Papermaker's fabrics

Publications (2)

Publication Number Publication Date
EP0425523A1 true EP0425523A1 (en) 1991-05-08
EP0425523B1 EP0425523B1 (en) 1995-03-15

Family

ID=10638876

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89907232A Revoked EP0425523B1 (en) 1988-06-17 1989-06-16 Papermaker's fabrics

Country Status (9)

Country Link
EP (1) EP0425523B1 (en)
KR (1) KR900702129A (en)
AT (1) ATE119955T1 (en)
AU (1) AU3839889A (en)
DE (1) DE68921754T2 (en)
DK (1) DK289490A (en)
FI (1) FI906193A0 (en)
GB (2) GB8814436D0 (en)
WO (1) WO1989012717A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019175076A1 (en) 2018-03-15 2019-09-19 Voith Patent Gmbh Covering for a machine for producing a fibrous material web
WO2020187480A1 (en) 2019-03-18 2020-09-24 Voith Patent Gmbh Woven fabric and technical textile
WO2021028116A1 (en) 2019-08-09 2021-02-18 Voith Patent Gmbh Basic structure of a fabric for a machine for producing or processing a fibrous web, and method for producing said basic structure
DE102020121627A1 (en) 2020-08-18 2022-02-24 Voith Patent Gmbh press felt
WO2024028029A1 (en) 2022-08-05 2024-02-08 Voith Patent Gmbh Method, basic structure and paper machine clothing
DE102022121769A1 (en) 2022-08-29 2024-02-29 Voith Patent Gmbh Process, basic structure and covering

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4896702A (en) * 1988-12-01 1990-01-30 Niagara Lockport Industries Inc. Seam construction for papermaking fabrics
US5110672A (en) * 1991-06-19 1992-05-05 Huyck Corporation Papermakers' press felt with base fabric that does not require seaming
US6000441A (en) * 1998-08-12 1999-12-14 Asten, Inc. Multi-layered papermaker's seam product with formed loops
US5939176A (en) * 1998-09-01 1999-08-17 Albany International Corp. Warp loop seam
DE102004044568B4 (en) 2004-09-15 2021-08-05 Voith Patent Gmbh Press fabrics
US7473336B2 (en) * 2005-04-28 2009-01-06 Albany International Corp. Multiaxial fabrics
US7641768B2 (en) 2005-08-26 2010-01-05 Voith Patent Gmbh Method and joining assembly for joining ends of a fabric in a paper machine
US7892402B2 (en) * 2007-10-05 2011-02-22 Albany International Corp. Flat woven full width on-machine-seamable fabric
US8043477B2 (en) 2008-02-25 2011-10-25 Voith Patent Gmbh Belt and method of making a belt for a paper making machine
DE102009002121A1 (en) 2009-04-02 2010-10-14 Voith Patent Gmbh Seam press felt with flat and non-woven support structure
DE102009027305A1 (en) 2009-06-29 2010-12-30 Voith Patent Gmbh Method for producing endless belt, particularly press belt, involves forming web basic structure by providing web output structure comprising longitudinal threads and transverse threads
GB2473039A (en) * 2009-08-28 2011-03-02 Ian Gerald Lang Seam for a woven industrial fabric
US8353252B1 (en) * 2011-12-05 2013-01-15 Voith Patent Gmbh Process for preparing a seam area for a PMC base fabric
US9011645B2 (en) * 2012-09-07 2015-04-21 Voith Patent Gmbh Method for preparing a seam area for a PMC base fabric
CN103015251B (en) * 2012-12-13 2016-05-11 安徽太平洋特种网业有限公司 The production technology of the little Air permenbility flat filament drying net of a kind of high strength
US20170044718A1 (en) * 2015-08-13 2017-02-16 Voith Patent Gmbh Fabric for a machine for producing a fiber web
US9982388B2 (en) * 2015-08-13 2018-05-29 Voith Patent Gmbh Fabric for a machine to produce a fiber web and method of producing a fiber web
JP6739176B2 (en) 2016-01-20 2020-08-12 イチカワ株式会社 Base fabric for felt having seam loop and manufacturing method thereof
FI20165065A (en) * 2016-02-01 2017-08-02 Valmet Technologies Oy Outer fabric, press felt and method for making a seamless fabric
DE202016008587U1 (en) * 2016-06-28 2018-07-17 Voith Patent Gmbh Covering for a machine for producing a fiber web
CN113825875A (en) 2019-05-03 2021-12-21 福伊特专利有限公司 Seam felt and use in a tissue machine
DE102019111441A1 (en) 2019-05-03 2020-11-05 Voith Patent Gmbh Covering and use in a tissue machine

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DE3632386A1 (en) * 1986-09-24 1988-04-07 Heimbach Gmbh Thomas Josef MACHINE FELT AND METHOD FOR PRODUCING THE SAME

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019175076A1 (en) 2018-03-15 2019-09-19 Voith Patent Gmbh Covering for a machine for producing a fibrous material web
DE102018105956A1 (en) 2018-03-15 2019-09-19 Voith Patent Gmbh covering
CN111954735A (en) * 2018-03-15 2020-11-17 福伊特专利有限公司 Clothing for a machine for producing a fibrous material web
CN111954735B (en) * 2018-03-15 2022-12-09 福伊特专利有限公司 Clothing for a machine for producing a fibrous web
WO2020187480A1 (en) 2019-03-18 2020-09-24 Voith Patent Gmbh Woven fabric and technical textile
DE102019106769A1 (en) * 2019-03-18 2020-09-24 Voith Patent Gmbh Fabrics and technical textiles
WO2021028116A1 (en) 2019-08-09 2021-02-18 Voith Patent Gmbh Basic structure of a fabric for a machine for producing or processing a fibrous web, and method for producing said basic structure
DE102020121627A1 (en) 2020-08-18 2022-02-24 Voith Patent Gmbh press felt
WO2022037832A1 (en) 2020-08-18 2022-02-24 Voith Patent Gmbh Press felt
WO2024028029A1 (en) 2022-08-05 2024-02-08 Voith Patent Gmbh Method, basic structure and paper machine clothing
DE102022121769A1 (en) 2022-08-29 2024-02-29 Voith Patent Gmbh Process, basic structure and covering

Also Published As

Publication number Publication date
GB2238272A (en) 1991-05-29
DK289490D0 (en) 1990-12-05
ATE119955T1 (en) 1995-04-15
GB9026439D0 (en) 1991-02-20
WO1989012717A1 (en) 1989-12-28
AU3839889A (en) 1990-01-12
GB8814436D0 (en) 1988-07-20
DK289490A (en) 1990-12-05
EP0425523B1 (en) 1995-03-15
KR900702129A (en) 1990-12-05
GB2238272B (en) 1992-02-12
DE68921754D1 (en) 1995-04-20
DE68921754T2 (en) 1995-07-13
FI906193A0 (en) 1990-12-14

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