EP0964089A2 - Geweben - Google Patents

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Publication number
EP0964089A2
EP0964089A2 EP99304551A EP99304551A EP0964089A2 EP 0964089 A2 EP0964089 A2 EP 0964089A2 EP 99304551 A EP99304551 A EP 99304551A EP 99304551 A EP99304551 A EP 99304551A EP 0964089 A2 EP0964089 A2 EP 0964089A2
Authority
EP
European Patent Office
Prior art keywords
yarns
layer
fabric
yarn
shaped
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Withdrawn
Application number
EP99304551A
Other languages
English (en)
French (fr)
Other versions
EP0964089A3 (de
Inventor
Michel Garon
Gilbert Ross
Robert Boily
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.)
Voith Fabrics Heidenheim GmbH and Co KG
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
Priority claimed from CA002238794A external-priority patent/CA2238794A1/en
Application filed by Scapa Group Ltd filed Critical Scapa Group Ltd
Publication of EP0964089A2 publication Critical patent/EP0964089A2/de
Publication of EP0964089A3 publication Critical patent/EP0964089A3/de
Withdrawn legal-status Critical Current

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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
    • D21F1/0054—Seams thereof
    • 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

  • This invention relates to the weave structure of a woven fabric, particularly in the edge region of a fabric which is joined by a seam to form an endless tube or belt for use as a conveyor belt, or as papermachine clothing, particularly dryer fabrics.
  • a frequently used form of seam is a looped seam or a spiral loop seam.
  • a flattened helical coil is attached to each end of the fabric, by means of a CD yarn passed through the loops of the spiral and bound onto the fabric by having at least selected machine direction yarns passed about the spiral binding yarn and reincorporated into the fabric.
  • the seam is completed by interdigitating the spirals on opposed edges of the fabric and passing a further CD binding yarn or pintle wire through the interdigitated loops of the spirals.
  • the seam thus formed will tend to be symmetrical about the so-called 'neutral line' of the fabric.
  • symmetrically woven fabrics comprising e.g. two layers of CD yarns of the same diameter
  • the neutral line lies in the geometric centre plane of the fabric.
  • asymmetric weaves such as those described which may also comprise a layer of coarse CD yarns to the back and a layer of fine or shaped (i.e. having a cross-section other than circular) CD yarns to the face, the neutral line is displaced towards the fine or shaped yarn side.
  • the seam coils lie to the fine or shaped yarn side of the fabric and will thus tend to stand proud of the fabric on the fine or shaped yarn side, and may be recessed on the coarse yarn side.
  • the projection of the seam proud of the paper contacting surface (fine or shaped yarn side) of the fabric means that there is an enhanced risk of marking of the paper by the seam, and it is desirable to reduce or substantially eliminate fabric features which may cause such marking, to ensure a consistent quality of paper product.
  • the proudness of the seam can make the seam more susceptible to wear and thereby create a point of weakness in the fabric.
  • An object of the invention is to provide a woven fabric which is constructed in such a way that projection of a seam used for joining the fabric is reduced or substantially eliminated in asymmetric fabric constructions.
  • a woven fabric comprises at least two layers of CD yarns, comprising a first layer of larger dimensioned yarns and a second layer of smaller dimensioned yarns, and at at least one edge thereof, a seaming spiral connected to the fabric by a seam binding yarn, secured by at least selected MD yarns being looped about said seam binding yarn, characterised in that the final smaller dimensioned or non-circular cross-sectioned yarn is displaced to the opposite side of the fabric from the plane of said second layer.
  • the last two larger dimensioned yarns are displaced towards the plane of said second layer from the plane of said first layer.
  • dimensioned refers to general overall cross-sectional dimensions, including diameter.
  • the third larger dimensioned CD yarn from the edge may be of a diameter intermediate the diameters of the yarns of the larger and smaller diameter layers.
  • the yarns may be of generally circular cross-section or may be of other cross-sections, e.g. flattened.
  • a specific example of a fabric intended for use as papermachine clothing specifically a dryer fabric, or a filter belt, etc.
  • a fabric intended for use as papermachine clothing specifically a dryer fabric, or a filter belt, etc.
  • This pattern of cross-machine (CD) yarns is maintained until the end region of the fabric, where one smaller diameter yarn 14 is placed on the machine side of the fabric, and the last two larger diameter yarns 15, 16 are displaced towards the paper-side of the fabric.
  • a terminal binding yarn 17 is used to bind the loops of a flattened helical spiral 18 to the edge of the fabric, and this in turn is used to join opposed ends of the fabric by interdigitating with the loops of a matching spiral 18a and passing of a pintle wire or seam binding yarn 19 through the interdigitated loops.
  • the fabric is completed by weaving of machine direction (MD) warp yarns such as for example 20, which comprises a main reach 20a which is for example floated over pairs of smaller diameter or shaped yarns 13 in layer 12, and over a single larger diameter yarn 11 in layer 10, then looped about binding yarn 17, and a back-woven reach 20b, woven back from the loop about binding yarn 17, into the body of the fabric.
  • MD machine direction
  • the penultimate CD yarn 21 in machine side layer 10 is of a diameter intermediate between the diameters of the larger diameter yarns 11 of layer 10, and the smaller diameter yarns 13 of layer 12.
  • Selected warp yarns such as yarn 20, are looped about the binding yarn 17, while to create space for the loops of spiral 18, others of the warp yarns, not shown, may be looped about the terminal larger diameter CD yarn 16.
  • the effect achieved by the fabric structure according to the preferred embodiment of the invention is to seat the spiral 18 away from the paper-side of the fabric.
  • the MD yarn 20 is preferably twisted as it passes around the binding yarn 17 through 180°, so that the crimp pattern of the yarn is maintained, whilst keeping the longer floats on the paper-side in the return reach 20b of the yarn, as they are on the main reach 20a of the yarn.
  • the twist can sometimes cause proudness, creating sheet marks and/or wear susceptible weak points.
  • the geometry of the weave pattern is altered in the seam region, and this in combination with the seating away from the paper-side of the fabric helps to minimise sheet marking and seam wear.
  • the MD yarns 20 are preferably rectangular in cross-section, or other flat or profiled section yarns may be used.
  • the CD yarns are preferably round, although flat or other cross-sectional shaped yarns may again be used.
  • a fabric may comprise a single layer of alternating larger and smaller diameter or shaped yarns. In practice, the smaller diameter or shaped yarns will migrate to form a sub-layer of such yarns above a sub layer formed by the larger diameter yarns left in the plane of the single layer.
  • the fabric construction of the invention and as particularly described may be used on other fabrics formable by seams to form endless belts or tubular fabrics, such as conveyor or filter belts.

Landscapes

  • Woven Fabrics (AREA)
EP99304551A 1998-06-12 1999-06-10 Geweben Withdrawn EP0964089A3 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CA002238794A CA2238794A1 (en) 1998-06-12 1998-06-12 Woven fabrics
CA2238794 1998-06-12
CA2245193 1998-08-06
CA002245193A CA2245193A1 (en) 1998-06-12 1998-08-06 Woven fabrics

Publications (2)

Publication Number Publication Date
EP0964089A2 true EP0964089A2 (de) 1999-12-15
EP0964089A3 EP0964089A3 (de) 2000-10-18

Family

ID=25680249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99304551A Withdrawn EP0964089A3 (de) 1998-06-12 1999-06-10 Geweben

Country Status (2)

Country Link
EP (1) EP0964089A3 (de)
CA (1) CA2245193A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100378270C (zh) * 2002-07-24 2008-04-02 阿尔巴尼国际公司 具有接缝加固环的可机上缝合的工业用织物

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012519A1 (de) * 1978-12-15 1980-06-25 Albany International Corp. Nahtausbildung für Papiermaschinenfilze oder Verformungsgewebe
WO1999007937A1 (en) * 1997-08-09 1999-02-18 Scapa Group Plc Fabric seam

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012519A1 (de) * 1978-12-15 1980-06-25 Albany International Corp. Nahtausbildung für Papiermaschinenfilze oder Verformungsgewebe
WO1999007937A1 (en) * 1997-08-09 1999-02-18 Scapa Group Plc Fabric seam

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100378270C (zh) * 2002-07-24 2008-04-02 阿尔巴尼国际公司 具有接缝加固环的可机上缝合的工业用织物

Also Published As

Publication number Publication date
CA2245193A1 (en) 1999-12-12
EP0964089A3 (de) 2000-10-18

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