EP0181882B1 - Webmaschine - Google Patents

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Publication number
EP0181882B1
EP0181882B1 EP19850902100 EP85902100A EP0181882B1 EP 0181882 B1 EP0181882 B1 EP 0181882B1 EP 19850902100 EP19850902100 EP 19850902100 EP 85902100 A EP85902100 A EP 85902100A EP 0181882 B1 EP0181882 B1 EP 0181882B1
Authority
EP
European Patent Office
Prior art keywords
weft yarn
yarn end
guide
shed
warp
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
EP19850902100
Other languages
English (en)
French (fr)
Other versions
EP0181882A1 (de
Inventor
John Dalton Griffith
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.)
Sulzer AG
Original Assignee
Gebrueder Sulzer AG
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 Gebrueder Sulzer AG filed Critical Gebrueder Sulzer AG
Publication of EP0181882A1 publication Critical patent/EP0181882A1/de
Application granted granted Critical
Publication of EP0181882B1 publication Critical patent/EP0181882B1/de
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/40—Forming selvedges
    • D03D47/48—Forming selvedges by inserting cut end of weft in next shed, e.g. by tucking, by blowing

Definitions

  • the present invention relates to apparatus for use in a weaving loom for turning weft thread ends into the shed to create a selvedge, and to a weaving loom including the apparatus.
  • the present invention is suitable for use with a fluid jet loom for creating a selvedge at the side of the warp sheet opposite to that at which weft insertion takes place.
  • Turning-in of weft thread ends is known as a technique for creating a selvedge and is achieved by either using a needle which engages the weft thread end and positions it within the shed prior to beat up or using several jet nozzles as demonstrated in U.K. Patent 543,398 for blowing the weft thread end into the shed prior to beat up. Both of these modes of operation have drawbacks and are unsuitable particularly at high pick rates.
  • the first mode of operation requires precision in construction and setting up in order to ensure that the needle correctly engages with the weft thread end. Additionally, since the needle penetrates into the shed it must be removed before beat-up can be completed. Accordingly immediately before beat-up the weft thread end is unsupported and so is able to relax thereby creating a loose selvedge which is unsatisfactory.
  • the weft thread end is inserted by streams of air flowing from jet nozzles and has the tendency to snag against the warp threads. This tendency obviously increases if the weft thread and/or warp threads are of a hairy character. Accordingly correct turning-in is not consistently assured and so can result in an irregular selvedge. Additionally use of several jet nozzles necessitates a high consumption of pressurised air.
  • apparatus for turning a weft yarn into a warp shed for creation of a selvedge including a movable guide which in a first position is located outside the warp sheet to receive a weft yarn end after weft insertion, and which is movable to a second position located within the warp shed whereat the guide serves to separate the weft yarn end from the warp threads and a nozzle associated with the guide, the nozzle directing a flow of fluid along the guide for carrying the weft yarn end into the warp shed.
  • the movable guide includes a pair of arms spaced apart to define a gap for receiving the weft yarn end and for guiding flow of fluid therealong for carrying the weft yarn end into the warp shed.
  • a method of turning a weft yarn end into a warp shed for creation of a selvedge including receiving the weft yarn end protruding from the warp sheet in a movable guide, after beat-up moving the guide into the newly formed shed to provide a passageway for the weft yarn end, directing a flow of fluid along the passageway to move the weft yarn end into the shed, removing the guide from the shed whilst maintaining said flow of fluid for maintaining the weft yarn end in position until beat-up of the subsequently inserted weft yarn.
  • An apparatus according to the present invention is generally shown at 10 and includes a guide member 12 and associated fluid jet nozzle 14, the fluid usually being compressed air.
  • the jet nozzle 14 is aligned substantially in line with the fell position and is positioned to one side of the warp sheet 18 for directing a stream of air into the shed in a direction opposite to the direction of weft insertion.
  • the guide member 12 is generally positioned between the jet nozzle 14 and the adjacent side of the warp sheet.
  • the guide member 12 includes a pair of arms 20, 21 which are mounted on a rotary shaft 23 so as to be spaced apart to define a gap 24 therebetween.
  • the arms 20, 21 are conveniently formed from a thin gauge strip of metal or similar material.
  • the guide member 12 is movable between first and second positions. In the first position it is located so that it is able to receive the weft yarn end within the gap after the weft yarn has been fed across the warp shed. This may be achieved by positioning the guide member 12 so that in its first position it is aligned with the path of weft insertion so that weft yarn passes through the gap as the weft yarn passes beyond the warp sheet at termination of the weft insertion cycle or alternatively, as per the illustrated embodiment, the guide member 12 may be positioned adjacent a weft yarn holding device 26, as for instance described in our European Patent Application 83900427.
  • the guide is positioned downstream of the path of weft insertion so that the protruding weft yarn end is moved into the gap 24 during beat-up as illustrated in Figure 1.
  • the reed 28 is retracted and shaft 23 is rotated to move the guide member 12 to its second position whereat it is located within the newly created shed as close as possible to the fell of the shed. This position is illustrated in Figure 2.
  • the spaced apart arms 20, 21 effectively define a passageway extending longitudinally of the fell and along which passageway the weft yarn end may be moved without contacting the warp threads.
  • the jet nozzle 14 is positioned so as to direct its emitted flow into the gap 24 i.e. along the passageway so that its emitted air flow is guided between the arms. This concentrates and regulates the air flow through the gap 24.
  • the air flow from the jet nozzle 14 carries the weft yarn end between the arms 20, 21 and into the warp shed.
  • the weft yarn end during its passage into the warp shed is separated from the warp threads by the arms 20, 21, and so is restrained from snagging on them.
  • the arms 20, 21 are retracted back to their initial position to receive the next weft yarn end whilst the jet nozzle 14 continues to emit a flow of air into the warp shed, preferably until after beat-up.
  • weft yarn end is maintained in position within the warp shed up to and during beat-up and so is correctly positioned and maintained under tension whilst beat-up occurs.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (6)

1. Vorrichtung zum Einlegen von Schussgarn in das Fach einer Webmaschine zur Bildung einer Kante, welche ein bewegliches Führungsteil aufweist, das in einer ersten Stellung ausserhalb des Webfaches zur Aufnahme des Schussgarns nach dem Schusseintrag angeordnet ist und in eine zweite Position bewegbar ist, wobei das Führungsteil dazu dient, das Schussgarnende von den Kettfäden zu trennen, und mit einer Düse, welche dem Führungselement zugeordnet ist und einen Fluidstrahl entlang des Führungselementes liefert, um das Schussgarnende in das Webfach zu befördern.
2. Vorrichtung nach Anspruch 1, worin das bewegliche Führungselement ein Paar Arme aufweist, weiche voneinander getrennt sind, um einen Zwischenraum zur Aufnahme des Schussgarnendes zu bilden und einen Fluidstrahl zu führen, womit das Schussgarnende in das Webfach gebracht werden kann.
3. Vorrichtung nach Anspruch 1 oder 2, worin das bewegliche Führungselement so angeordnet ist, dass es in seiner ersten Position in Schusseintragsrichtung angeordnet ist, um das Schussgarnende aufzunehmen.
4. Vorrichtung nach Anspruch 1 oder 2, worin das Führungselement stromabwärts der Schusseintragsrichtung angeordnet ist, um das vorstehende Schussgarnende während des Anschlagvorganges aufzunehmen.
5. Vorrichtung nach Anspruch 4, worin eine Haltevorrichtung für das Schussgarn stromaufwärts des Führungselements angeordnet ist, um das Schussgarn vor dem Anschlagen aufzunehmen.
6. Verfahren zum Einlegen eines Schussgarnendes in das Webfach zur Bildung einer Webkante, welches die folgenden Schritte umfasst
- Aufnahme des Schussgarnendes, welches aus dem Webfach hervorragt, in ein bewegliches Führungselement
- Bewegen des Führungselementes in das neue Webfach nach dem Anschlagen des Schussfadens zur Bildung eines Durchlasses für das Schussgarnende
- Führung eines Fluidstrahles entlang des Durchlasses zur Einführung des Schussgarnendes in das Webfach
- Entfernung des Führungselementes aus dem Webfach, während die Strömung des Fluidmediums aufrechterhalten wird, um das Webfachende in seiner Stellung bis zum Anschlagen des nächsten eingetragenen Schussgarnes zu halten.
EP19850902100 1984-05-18 1985-05-17 Webmaschine Expired EP0181882B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB848412756A GB8412756D0 (en) 1984-05-18 1984-05-18 Weaving loom
GB8412756 1984-05-18

Publications (2)

Publication Number Publication Date
EP0181882A1 EP0181882A1 (de) 1986-05-28
EP0181882B1 true EP0181882B1 (de) 1988-07-27

Family

ID=10561173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850902100 Expired EP0181882B1 (de) 1984-05-18 1985-05-17 Webmaschine

Country Status (4)

Country Link
EP (1) EP0181882B1 (de)
DE (1) DE3563994D1 (de)
GB (1) GB8412756D0 (de)
WO (1) WO1985005384A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4715410A (en) * 1986-09-16 1987-12-29 Sulzer Brothers Limited Weaving loom

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE605360C (de) * 1934-02-21 1934-11-09 Tefag Textil Finanz A G Vorrichtung an Webmaschinen mit Greiferschuetzen zum Einbiegen der Schussfadenenden
GB543398A (en) * 1939-08-26 1942-02-24 Sulzer Ag Improvements in or relating to looms for weaving
US3153430A (en) * 1958-05-12 1964-10-20 Warner Swasey Co Selvage forming mechanism for weaving machines
LU63368A1 (de) * 1971-06-18 1973-01-22
DE2707682C2 (de) * 1977-02-23 1978-10-05 Emil Jaeger Kg, 4400 Muenster Kanteneinleger fuer einen schuetzenlosen webstuhl
EP0098856B1 (de) * 1982-01-16 1986-05-28 Sulzer Brothers Limited Fadenhaltevorrichtung

Also Published As

Publication number Publication date
GB8412756D0 (en) 1984-06-27
DE3563994D1 (en) 1988-09-01
EP0181882A1 (de) 1986-05-28
WO1985005384A1 (en) 1985-12-05

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