EP0610881B1 - Nahtwebmaschine mit Fransenfänger - Google Patents

Nahtwebmaschine mit Fransenfänger Download PDF

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Publication number
EP0610881B1
EP0610881B1 EP94101890A EP94101890A EP0610881B1 EP 0610881 B1 EP0610881 B1 EP 0610881B1 EP 94101890 A EP94101890 A EP 94101890A EP 94101890 A EP94101890 A EP 94101890A EP 0610881 B1 EP0610881 B1 EP 0610881B1
Authority
EP
European Patent Office
Prior art keywords
seam
fringe
woven
fabric
catcher
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 - Lifetime
Application number
EP94101890A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0610881A1 (de
Inventor
Hans-Eugen Häcker
Edgar Hofstetter
Eckhard Kaminski
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.)
Novatech GmbH Siebe und Technologie fuer Papier
Original Assignee
Novatech GmbH Siebe und Technologie fuer Papier
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
Application filed by Novatech GmbH Siebe und Technologie fuer Papier filed Critical Novatech GmbH Siebe und Technologie fuer Papier
Publication of EP0610881A1 publication Critical patent/EP0610881A1/de
Application granted granted Critical
Publication of EP0610881B1 publication Critical patent/EP0610881B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D41/00—Looms not otherwise provided for, e.g. for weaving chenille yarn; Details peculiar to these looms
    • 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

  • the invention relates to a seam weaving machine for making a fabric endless, which weaves a woven seam from fringes formed on the opposite fabric ends and weft threads removed from the fabric. Fringes of the fabric ends that are aligned with one another are led upward and / or downward out of the woven seam at stitching points that are distributed over the width of the woven seam.
  • the invention further relates to a fringe catcher for such a seam weaving machine, which has an arm movable by a drive device with a hook at the front end, which detects the fringe ends protruding from the woven seam and deposits them in such a way that they do not interfere with further weaving.
  • the warp thread fringes are alternately inserted as auxiliary weft threads from the two fabric ends.
  • the warp thread fringes are not entered over the full width of the seam weaving compartment, but are led out of the seam weaving compartment at a so-called piercing point.
  • the warp thread fringe of the other fabric end that is aligned with it is also only up to this Piercing point entered in the seam weaving compartment.
  • the entered lengths of the aligned warp thread fringes of the two fabric ends thus add up to the full width of the woven seam.
  • the stitching points are distributed in a pattern over the woven seam so that the highest possible tensile strength of the woven seam is achieved.
  • a piercing finger which, in a seam weaving machine which has a shaft frame shedding device, engages or sticks through the auxiliary warp threads of the upper compartment and the auxiliary weft thread initially entered over the full width of the shed upwards out of the shed gets out.
  • the finger is provided with a clamping device at its front end. The piercing finger can be pivoted and displaced parallel to the auxiliary warp threads and can also be moved over the width of the woven seam.
  • a seam weaving machine with a jacquard shedding device is known from EP-A-43 441.
  • a piercing finger is not necessary here, since the integration of the auxiliary weft threads into only part of the width of the weaving seam is achieved in that the shed is only stretched over a corresponding part. It depends on the installation position of the pull-through gripper whether the ends of the warp thread fringes protrude upwards or downwards from the woven seam. In general, the warp thread fringes protrude on the running side of the paper machine screen so that they do not cause marking in the paper.
  • Paper machine screens often consist of two layers of fabric that are bound together by special composite threads.
  • efforts are made to no longer remove all of the warp thread fringes to one side, generally the running side, since the ends of the warp thread fringes of the paper-side fabric layer would then have to be passed through the running-side fabric layer in a manner deviating from the weave pattern, as a result of which a disturbance in the Binding pattern and the higher thread volume results in a reduction in water permeability, which in turn results in a marking in the paper.
  • the present invention is therefore based on the object of providing a seam weaving machine in which the fringe ends can be brought to the top of the fabric or generally the fringe ends can also be brought to the opposite side of the fabric from the pulling gripper.
  • this object is achieved in that a fringe catcher is arranged in the edge region of the woven seam, which has a drive device which moves the fringe catcher forward and back over the selvedge after the change of subject, so that the fringe catcher has a fringe projecting upwards to the rear and pulls away above the already formed part of the woven seam.
  • the fringes of each fabric end are held in a so-called magazine band, in the order specified by the fabric binding.
  • a separator as is known, for example, from DE-U-89 03 454, the fringes are removed individually from the magazine band and by a transfer gripper at the side next to the seam weaving compartment brought.
  • the pull-through gripper (DE-U-92 15 498) extends from the opposite side of the seam weaving compartment through the seam weaving compartment, grips the fringe and takes it with it when it moves back, whereby the fringe is inserted into the seam weaving compartment.
  • the pulling gripper exerts a tension on the fringe so that it lies taut in the seam weaving compartment.
  • a sley (DE-U-92 11 353) strikes the fringe against the selvedge.
  • the shed forming device which is a jacquard machine, forms only a partial weaving shed, i.e. the top shed does not extend across the maximum width of the weaving seam, so that the fringe that is turned runs from the stitching point over all auxiliary warp threads, but at the opposite end of the weaving seam dives down again and finally protrudes downwards.
  • the function of the fringe catcher according to the invention is to pull the end of the fringe upwards so that it no longer passes down at the edge of the woven seam. This is only necessary in the case of a multi-layer fabric, since there the warp thread fringes, which are involved in the formation of the fabric layer, which is located in the top of the seam weaving machine, are to be pulled out upwards.
  • the fringe catcher is preferably arranged on the outermost edge within the width of the woven seam. About 3 to 5 mm of the edge area of the woven seam remain free of piercing points. A fringe catcher is preferably arranged on each side of the woven seam, which moves in the respective edge region about 3 to 5 mm wide and detects the fringe in this edge region.
  • the fringe catchers can be fixedly positioned or can be moved over the width of the woven seam, ie parallel to the warp fringes or auxiliary weft threads in the woven seam. It is also possible to have only a single fringe catcher to be provided, which can be moved over the width of the woven seam and is moved back and forth between the two outermost edge positions of the woven seam.
  • the hook at the front end of the fringe catcher is preferably so wide that it spans some auxiliary warp threads so that it can rest on it with little force.
  • the back of the hook rises to the front so that the fringe catcher glides over the fringe to be gripped as it moves forward. It is also possible to raise the fringe catcher during its forward movement by means of a control curve and thereby lift it over the fringe to be gripped.
  • the hook of the fringe catcher When moving back, the hook of the fringe catcher must rest on the auxiliary warp threads or on the part of the woven seam that has already been formed.
  • the upper compartment lies approximately in the tissue plane and the lower compartment points downwards under the compartment opening angle.
  • those auxiliary warp threads that are not involved in the formation of the partial shed are located in the sub-shed, so that the fringe entered runs over all of these auxiliary warp threads.
  • the shed is changed, the auxiliary warp threads in the opposite edge area of the weaving seam being inevitably involved in the subsequent partial shed, since there is no stitching point in this edge area.
  • the fringe that has just been entered is pushed upwards in this edge area in any case by a part of the auxiliary warp threads.
  • the hook of the fringe catcher slides over the fringe as it moves forward, takes it with it when it moves back and pulls its end pointing downwards out.
  • the particular advantage of this method of operation is that the fringe catcher does not take over the entered fringe from the pull-through gripper and is therefore not dependent on precise interaction with the pull-through gripper.
  • the cycle time is reduced in that the fringe catcher only detects the fringe after the change of subject, so that its activity overlaps with the pulling through of the next fringe.
  • the two ends 10, 20 of a fabric are to be connected to one another by a woven seam 1.
  • fringes 11, 21 are formed on the fabric ends 10, 20 by removing weft threads, which are held at their ends by a magazine band 15, 25 (FIG. 2) in the order or sequence specified by the weaving process.
  • the fringes 11, 21 are thus the ends of the warp threads of the fabric. They are entered as so-called auxiliary weft threads in a shed 2, which is stretched between the ends 10, 20 of the fabric arranged at a distance of approximately 5 to 15 cm.
  • the shed is formed from weft threads, which have been removed from the fabric at the ends 10, 20, for example, and act as auxiliary warp threads 3 in the manufacture of the woven seam and for the suture shed.
  • the seam weaving compartment 2 is formed by a jacquard machine.
  • Each fringe 11 of one fabric end 10 corresponds or is aligned with a fringe 21 of the other fabric end 20.
  • the fringes 11, 21 are not integrated into the entire width of the woven seam 1, but the aligned fringes 11, 21 meet at a piercing point 4 within the width of the woven seam 1 and emerge from the woven seam 1 at this piercing point 4 upwards or downwards.
  • This partial integration of the fringes 11, 21 is achieved in a known manner in that the jacquard machine forms the seam weaving compartment 2 in such a way that it does not extend over the entire width of the weaving seam 1, but only over the area in which the fringe to be woven is woven 11 or 21 should be woven.
  • the fringe 21 or 11 aligned therewith is or becomes formed by the formation of a corresponding seam weaving compartment 2 extending from the other end 20 or 10, which, together with the seam weaving compartment 2 of the aligned fringe 11, 21 mentioned above, becomes the full width of the weaving seam 1 added, registered.
  • the fringes 11, 21 are entered in such a way that the fringes 11, 21 are removed from the magazine band 15, 25 and separated in a known manner by a separator.
  • a transfer gripper takes the isolated fringe 11, 21 from the separator, brings it down to the height of the seam weaving compartment 2 and transfers it there to a pull-through gripper which extends through the seam weaving compartment 2 and pulls the fringe 11, 21 through the seam weaving compartment 2 when it moves back .
  • the magazine band 15, 25 and the separator engaging therein are arranged above the plane of the fabric ends 10, 20 and the woven seam 1.
  • the pull-through gripper must then act on the opposite side, that is, below this level, since otherwise it collides with the fringes 11, 21 extending from the fabric ends 10, 20 up to the magazine collar. As a consequence, that the shedding must be done so that the ends of the fringes 11, 21 are led out at the piercing points 4 down. This is not a problem with single-layer fabrics, since the fabric can be inserted into the seam weaving machine in such a way that the side of the fabric points downwards at which the ends of the fringes 11, 21 are to emerge. This is usually the running side of a paper machine screen.
  • the seam weaving compartment 2 is formed in such a way that the upper compartment 6 lies in the plane of the fabric ends 10, 20 and the weaving seam 1, while the lower compartment 7 points downward.
  • the seam weaving compartment 2 is always stretched only from the fabric end 10 or 20, on which the fringe 11 or 21 in question hangs, to the piercing point 4.
  • All auxiliary warp threads 3 outside this seam weaving compartment 2 are located in the sub-compartment, i.e. the fringe 11, 21 entered by the pull-through gripper, not shown, runs outside the part-seam weaving shed 2 over the auxiliary warp threads 3.
  • the fringe catcher 30 has a rod 31, at the front end of which a hook 32 is provided.
  • the hook 32 opens backwards like a barb.
  • the fringe catcher 30 can be moved back and forth parallel to the auxiliary warp threads 3 by a drive device 33, generally a pneumatic cylinder.
  • the hook 32 is rounded on its underside so that it can rest with little force on the woven seam 1 and the auxiliary warp threads 3 located in the upper compartment 6 without damaging them.
  • the rearward-pointing tip 34 of the hook 32 has a sufficient width to lie on three or more auxiliary warp threads 3 and is designed like a skid. During the forward movement of the fringe catcher 30, the tip 34 runs over the fringe 11, 21 to be detected and takes it with it when the fringe catcher 30 moves back.
  • the mouth width of the hook 32 is dimensioned such that the fringe 11, 21 can slide through the hook 32 with some friction, taking into account the cranking or waveform of the fringe 11, 21 produced by the heat setting of the fabric.
  • the fringe catcher 30 is arranged in such a way that it can grasp all the fringes 11, 21 which are led out upwards, regardless of where the piercing point 4 is located.
  • a fringe catcher 30 is positioned on each outermost edge of the woven seam, and at the same time the outermost edge region 8 of the woven seam 1, in which the fringe catcher 30 moves, is kept free of piercing points 4.
  • a width of 3 to 5 mm is sufficient for this edge region 8.
  • only one fringe catcher 30 is shown in FIG. 1.
  • two permanently positioned fringe catchers 30 are used, the position of which can be changed in accordance with the width of the woven seam to be woven in the individual case.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Manipulator (AREA)
  • Looms (AREA)
  • Woven Fabrics (AREA)
  • Paper (AREA)
EP94101890A 1993-02-08 1994-02-08 Nahtwebmaschine mit Fransenfänger Expired - Lifetime EP0610881B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9301722U DE9301722U1 (de) 1993-02-08 1993-02-08 Nahtwebmaschine mit Fransenfänger
DE9301722U 1993-02-08

Publications (2)

Publication Number Publication Date
EP0610881A1 EP0610881A1 (de) 1994-08-17
EP0610881B1 true EP0610881B1 (de) 1997-05-14

Family

ID=6889111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94101890A Expired - Lifetime EP0610881B1 (de) 1993-02-08 1994-02-08 Nahtwebmaschine mit Fransenfänger

Country Status (7)

Country Link
US (1) US5411063A (fi)
EP (1) EP0610881B1 (fi)
JP (1) JPH06240541A (fi)
AT (1) ATE153088T1 (fi)
CA (1) CA2115083A1 (fi)
DE (2) DE9301722U1 (fi)
FI (1) FI102483B1 (fi)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19505280C2 (de) * 1995-02-16 1998-08-06 Staeubli Gmbh Verfahren und Vorrichtung zur maschinellen Herstellung einer Naht zum Endlosmachen einer Gewebebahn
US6014797A (en) * 1997-06-16 2000-01-18 Jwi Ltd. Method and apparatus for unravelling threads
AT405419B (de) * 1997-10-17 1999-08-25 Wis Engineering Gmbh Verfahren und vorrichtung zum bereitstellen der kettfadenenden eines gewebebandes
SE512567C2 (sv) * 1998-08-31 2000-04-03 Texo Ab Styrarrangemang vid skaftramsvävmaskin eller vävmaskinsarrangemang innefattande sådan maskin
SE512568C2 (sv) * 1998-08-31 2000-04-03 Texo Ab Skaftramsvävmaskin med varptrådsuppsättningar i två skikt samt två varptrådsuppsättningar i vändvecksskikt
SE512569C2 (sv) * 1998-08-31 2000-04-03 Texo Ab Vävmaskinsarrangemang med metod, anordning och användning samt rundvävd produkt framställd med arrangemanget
DE20105091U1 (de) * 2001-03-23 2002-09-05 Wangner Finckh Gmbh & Co Kg Spannzange für Nahtwebmaschinen
US6634068B1 (en) * 2002-04-24 2003-10-21 Astenjohnson, Inc. Apparatus for preparing a fabric for seaming
US7168456B1 (en) * 2005-10-26 2007-01-30 North Rocky Robot Technology, Inc. (Nortec) Method and apparatus to remove yarns from the fringes of an industrial textile
DE202005018856U1 (de) * 2005-12-01 2007-04-12 Wangner Gmbh & Co Kg Halterung für das Webblatt einer Nahtwebmaschine, um den Nahtschussfaden wahlweise mittels Schrägstellung der Riete oder verfahrbarer Rolle einzuwälzen
AT503434B1 (de) * 2006-06-29 2007-10-15 Wis Engineering Gmbh & Co Kg Vorrichtung zum entfernen von schussfäden aus einem geweberand

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3025909C2 (de) * 1980-07-09 1983-07-14 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Verfahren und Vorrichtung zum Herstellen einer Webnaht zwischen zwei Gewebeenden
DE8122449U1 (de) * 1981-07-30 1983-01-13 Fa. F. Oberdorfer, 7920 Heidenheim Vorrichtung zum verteilen der kettfadenenden waehrend der nahtbildung bei papiermachergeweben
US4581794A (en) * 1984-03-07 1986-04-15 Asten Group Inc. Automatic seaming machine for fabric belts
EP0236601B2 (en) * 1986-02-22 1996-09-04 Asten Group Inc. Automatic seaming machine for fabric belts
DE3446941A1 (de) * 1984-12-21 1986-07-03 F. Oberdorfer, 7920 Heidenheim Verfahren zur herstellung einer stecknaht zum endlosmachen eines gewebebandes und nahtungsmaschine
DE3507450A1 (de) * 1985-03-02 1986-09-04 Thomas Josef Heimbach GmbH & Co, 5160 Düren Vorrichtung zum ausriffeln von faeden aus einem gewebe
DE8903454U1 (de) * 1989-03-20 1990-07-26 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Separator für Nahtmaschinen
US5027483A (en) * 1990-01-31 1991-07-02 Asten Group, Inc. Apparatus for selectively releasing yarns from a fringe
US5183081A (en) * 1992-02-07 1993-02-02 Asten Group, Inc. Weave shed formation apparatus for end reweaving type joining apparatus

Also Published As

Publication number Publication date
EP0610881A1 (de) 1994-08-17
JPH06240541A (ja) 1994-08-30
FI102483B (fi) 1998-12-15
DE59402688D1 (de) 1997-06-19
FI940515A (fi) 1994-08-09
CA2115083A1 (en) 1994-08-10
US5411063A (en) 1995-05-02
ATE153088T1 (de) 1997-05-15
FI940515A0 (fi) 1994-02-04
FI102483B1 (fi) 1998-12-15
DE9301722U1 (de) 1994-06-09

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