EP0182597B1 - Tissu avec jointure à broche - Google Patents

Tissu avec jointure à broche Download PDF

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Publication number
EP0182597B1
EP0182597B1 EP85308249A EP85308249A EP0182597B1 EP 0182597 B1 EP0182597 B1 EP 0182597B1 EP 85308249 A EP85308249 A EP 85308249A EP 85308249 A EP85308249 A EP 85308249A EP 0182597 B1 EP0182597 B1 EP 0182597B1
Authority
EP
European Patent Office
Prior art keywords
pin
fabric
warp yarn
weft
loops
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
Application number
EP85308249A
Other languages
German (de)
English (en)
Other versions
EP0182597A1 (fr
Inventor
Frank C. Nowak
Thomas G. Gulya
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.)
Appleton Mills
Original Assignee
Appleton Mills
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
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Application filed by Appleton Mills filed Critical Appleton Mills
Priority to AT85308249T priority Critical patent/ATE42584T1/de
Publication of EP0182597A1 publication Critical patent/EP0182597A1/fr
Application granted granted Critical
Publication of EP0182597B1 publication Critical patent/EP0182597B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D3/00—Woven fabrics characterised by their shape
    • D03D3/04—Endless fabrics
    • 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

  • pin seamed fabrics have been utilized. With the pin seamed fabric, loops are attached to the ends of the fabric and a pin is inserted through the interdigitated loops to provide a connection.
  • the pin seamed fabric has the advantage that it can be opened and installed on the papermaking machine and the pin then inserted through the interdigitated loops to provide the endless configuration.
  • metal loops are connected by clips to the end of the fabric. Due to the thickness of the metal clips, it is necessary to add weft yarns adjacent the clips in order to taper the thickness from the metal clips to the body of the fabric. Increasing the number of weft yarns in the region of the pin seam decreases the permeability in this region and also increases the thickness. The increased thickness makes the fabric unsuitable for use as a papermaker's felt due to the fact that the felt, in operation, is passed through a nip between pressure rolls to extract water from the paper web.
  • the pin seamed fabrics have also been formed through use of spiral plastic members which were woven into the ends of the fabric.
  • the plastic spiral loops produce an increase in thickness in the seam area and a decrease in permeability.
  • woven back structures In an attempt to provide more uniformity in porosity and thickness in the pin seamed area, woven back structures have been utilized. In a woven back structure, the weft yarns in the end of the fabric are removed and the projecting warp yarns are then folded back to form loops and interwoven with the fabric.
  • United States Patents Nos. 2,325,900, 3,436,041, 4,026,330, 4,095,622, 4,182,381 and 4,401,137 show various types of woven back fabrics.
  • additional weft yarns are required in the area of the pin seam in order to adequately hold the woven backwarp yarns in position, so that the loops do not elongate.
  • the addition of the added weft yarns decreases the porosity of the fabric in the area of the pin seam, as well as providing an increase in thickness.
  • Papermaking fabrics have also been woven in endless form without a seam and an endless fabric has the inherent advantage of uniform porosity and thickness throughout its length. Endless fabrics, however, present certain problems in installation on the papermaking machine. To install the endless fabric, it is necess- sary to shift the roll mountings and slip the fabric over the rolls. Recently, due to the advent of stiffer, bulkier fabrics the problem of installation of an endless felt has been accentuated. The installation of an endless fabric on a papermaking machine is a timeconsuming operation which requires substantial down time for the machine.
  • German patent application 2164700 discloses a fabric wherein certain of the aforementioned disadvantages are obviated.
  • a warp yarn is woven with parallel weft elements one of which is a removable pin.
  • every pick of the warp yarn defines a loop extending around the removable pin and this is disadvantageous in that the thickness of the fabric is increased in the region of the pin seam produced when a pin is introduced through all of the loops.
  • Such increase in thickness in the region of the pin seam causes the endless fabric, when used for example in papermaking, to exhibit non-uniform water extraction characteristics.
  • an endless pin seamed fabric comprising a woven fabric, including a plurality of parallel weft elements and a single continuous warp yarn interwoven with said weft elements, said weft elements including a pin and adjacent yarns on either side of said pin, said warp yarn being interwoven with said weft elements in a plurality of picks, every other pick being looped around the pin so forming a plurality of first loops and alternate picks being looped around adjacent yarns so forming a plurality of second loops offset ' from said first loops, said pin being removable from said first loops to enable the felt to be open to a generally flat condition.
  • a method of producing an endless pin seamed fabric comprising the steps of arranging a group of weft yarns in a parallel pattern, disposing a pin parallel to said group of weft yarns, interweaving a single continuous warp yarn with said weft yarns in a series of picks and looping the warp yarn around the pin in every other pick and looping the warp yarn around a weft yarn adjacent to said pin in every alternate pick.
  • the pin can be removed so that the fabric can be opened up and readily installed on the papermaking machine. After installation, the pin can be reinserted through the interdigitated loops on the ends of the fabric.
  • the fabric of the invention has a uniform porosity in the area of the pin seam and a constant thickness.
  • the fabric has the inherent advantages of an endless fabric, and due to the pin seam, can be readily opened up and installed on the papermaking machine.
  • the fabric includes a single continuous warp yarn which is unbroken and this not only increases the strength of the fabric, but also prevents the loops from elongating in service, as can occur with the woven back type of loop construction.
  • the fabric of the invention can be used as a forming fabric, or dryer fabric, it has particular use as a papermaker's felt due to the fact that the thickness in the area of the pin seam is not increased and the porosity in this area is uniform.
  • Fig. 1 shows a pin seamed fabric 1 that has particular use as a fabric for a papermaking machine. More particularly, the fabric can be used as a papermaker's felt or as a forming fabric or dryer fabric.
  • Fabric 1 includes an array or plurality of parallel weft yarns 2, and a single, continuous warp yarn 3 is interwoven with the weft yarns. Certain picks or passes of the warp yarn 3 form projecting loops 4 and a pin 5, formed of plastic or metal, is inserted through the aligned interdigitated loops 4 to connect the ends of the fabric together.
  • warp yarn is used as in papermaker's terminology in which the warp yarns extend longitudinally of the fabric or in the machine direction.
  • wound as used in the specification and claims is intended to include strands of monofilament, multifilament, fiber materials, or mixtures of these materials in either twisted, untwisted, intertwined, or plied form.
  • the yarns can be formed of any desired materials, such as wool or synthetic materials, but it is preferred that the warp yarn 3 be formed of a material which will tend to retain the integrity of the loops 4 when the pin 5 is removed.
  • Figs. 3A-3H illustrate the endless weaving pattern for forming a two-layer fabric. While Figs. 3A-3H for purposes of illustration, merely show five vertical rows of weft yarns 2, in practice there may be hundreds or thousands of rows of weft yarns depending upon the length of the endless fabric to be produced.
  • the pin 5 is positioned parallel to an end yarn in the array of weft yarns 2, and in the first pick, the warp yarn 3 is interwoven with the weft yarns of the upper layer.
  • Fig. 3A shows the warp yarn 3 going over and under adjacent weft yarns 2, but it is contemplated that any desired weaving pattern can be employed.
  • Fig. 3A-3H shows the warp yarn 3 moving in a sinusoidal path
  • weft yarns 2 would be raised and lowered by harnesses to the desired position, and the warp yarn would be moved horizontally by a shuttle in a straight path to provide the interweaving.
  • warp yarn 3 is looped around pin 5 to form a loop 4 and is then interwoven in the upper layer of weft yarns 2 in a return or second pick.
  • the warp yarn 3 is interwoven in a third forward pick with the weft yarns of the lower layer (Fig. 3C), and the warp yarn is then looped around the end weft yarns in the lower layer and interwoven with the weft yarns of the lower layer in a return pick, as shown in Fig. 3D.
  • the warp yarn 3 is again interwoven with the weft yarns 2 of the upper layer, as illustrated in Fig. 3E and is then interwoven in a return pick as illustrated in Fig. 3F.
  • Warp yarn 3 then is interwoven with the weft yarns of the lower layer in a forward pick (Fig. 3G) and is looped around the pin 6 to form a second loop 4 and interwoven with the weft yarns in the lower layer in a return pick, as illustrated in Fig. 3H. This pattern is repeated throughout the width of the fabric.
  • Figs. 3A-3H show the weft yarns 2 arranged in four vertical rows (indicated by 2a-2d in Fig. 3A) to form a double layer fabric, it is contemplated that the weft yarns can also be arranged in only two rows in which case a single . layer fabric can be produced.
  • the resulting woven structure is an endless fabric in which certain picks or passes of the single continuous warp yarn 2 are looped around the pin 5.
  • the fabric can be opened up and conveniently installed on the papermaking machine. After installation, the pin can be reinserted within the aligned interdigitated loops 5.
  • the woven fabric of the invention has particular use as a base fabric for a papermaker's felt.
  • one or more layers of fibrous batt can be needled into one or both surfaces of the base fabric.
  • the needling operation may tend to damage the pin 5, so that after needling, the damaged pin can be removed and when the felt is installed on the papermaking machine, a new pin can be replaced.
  • the fabric of the invention has a constant thickness and permeability adjacent the pin seam. As the warp yarn is continuous, the fabric has improved strength over woven back types of fabric in which the warp yarns are severed.
  • the fabric can be readily woven on a standard weaving loom and no special equipment is required. Furthermore, the loop construction is made during the regular weaving process, so that the pin seamed fabric can be produced in a substantially shorter period of time than other pin seamed fabrics utilizing metal clips, plastic spirals, or woven back warp yarns.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Paper (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Woven Fabrics (AREA)
  • Manufacturing Of Multi-Layer Textile Fabrics (AREA)
  • Details Of Garments (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (2)

1. Tissu sans fin a couture a broche, constitue d'un produit tissé (1) comprenant une pluralité d'éléments de trame parallèles (2) et un seul fil de chaîne continu (3) entrelacé avec les éléments de trame (2), les éléments de trame (2) comprenant une broche (5) et des fils voisins de chaque côté de la broche, le fil de chaîne (3) étant entrelacé avec les éléments de trame (2, 5) en une pluralité de jets, caractérisé en ce qu'un jet sur deux est enroulé en boucle autour de la broche (5), formant une pluralité de premières boucles (4), tandis que l'autre jet est à chaque fois enroulé autour des fils voisins (2), formant une pluralité de deuxièmes boucles décalées par rapport aux premières boucles (4), la broche (5) pouvant être déposée des premières boucles (4) pour permettre au feutre d'être ouvert à un état globalement plat.
2. Procédé de fabrication d'un tissu sans fin à couture à broche (1), comprenant les étapes consistant à arranger un groupe de fils de trame (2) en un modèle parallèle, à disposer une broche (5) parallèlement au ,groupe de fils de trame (2), à entrelacer un seul fil de chaîne continu (3) avec les . fils de trame (2) en une série de jets, et caractérisé par l'étape consistant à enrouler en boucle le fil de chaîne (3) autour de la broche (5) dans un jet sur deux, et à enrouler en boucle le fil de chaîne (3) autour d'un fil de trame (2) voisin de la broche (5) dans chaque autre jet.
EP85308249A 1984-11-19 1985-11-13 Tissu avec jointure à broche Expired EP0182597B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85308249T ATE42584T1 (de) 1984-11-19 1985-11-13 Gewebe mit steckdrahtnaht.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US67314684A 1984-11-19 1984-11-19
US673146 1984-11-19

Publications (2)

Publication Number Publication Date
EP0182597A1 EP0182597A1 (fr) 1986-05-28
EP0182597B1 true EP0182597B1 (fr) 1989-04-26

Family

ID=24701492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85308249A Expired EP0182597B1 (fr) 1984-11-19 1985-11-13 Tissu avec jointure à broche

Country Status (6)

Country Link
EP (1) EP0182597B1 (fr)
AT (1) ATE42584T1 (fr)
AU (1) AU566997B2 (fr)
CA (1) CA1262669A (fr)
DE (1) DE3569763D1 (fr)
FI (1) FI81850B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6079454A (en) * 1997-11-24 2000-06-27 Astenjohnson, Inc. Loop/tie-back woven loop seam press base
US7028833B2 (en) 2004-04-09 2006-04-18 Heimbach Gmbh & Co. Method for connecting the belt ends of transport belts, as well as transport belt and closure aid for carrying out said method
GB2428693A (en) 2005-08-02 2007-02-07 Brent Swaine Woven papermaking fabric with seam

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2883734A (en) * 1955-11-10 1959-04-28 Draper Brothers Company Paper-maker's wet felt
SE355389B (fr) * 1970-12-31 1973-04-16 Nordiska Maskinfilt Ab
DE2437303A1 (de) * 1974-08-02 1976-02-12 Marx Gmbh J J Filztuch
GB1529728A (en) * 1975-11-27 1978-10-25 Jwi Ltd Woven seam in fabric and method of making same
AU527809B2 (en) * 1978-11-30 1983-03-24 Albany International Corp. Forming fabric seam and method of producing
US4186780A (en) * 1978-12-15 1980-02-05 Albany International Corp. Seam construction for multi-layer felts
GB2102730B (en) * 1981-07-31 1984-10-31 Albany Int Corp Improvements relating to pin seams

Also Published As

Publication number Publication date
EP0182597A1 (fr) 1986-05-28
FI854472A (fi) 1986-05-20
ATE42584T1 (de) 1989-05-15
CA1262669A (fr) 1989-11-07
FI81850B (fi) 1990-08-31
AU566997B2 (en) 1987-11-05
AU4987385A (en) 1986-05-29
FI854472A0 (fi) 1985-11-13
DE3569763D1 (en) 1989-06-01

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