EP0534429B1 - Verfahren zum Herstellen einer Einlegekante in schützenlosen Webmaschinen, insbesondere Luftwebmaschinen, und Vorrichtung zum Durchführen des Verfahrens - Google Patents

Verfahren zum Herstellen einer Einlegekante in schützenlosen Webmaschinen, insbesondere Luftwebmaschinen, und Vorrichtung zum Durchführen des Verfahrens Download PDF

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Publication number
EP0534429B1
EP0534429B1 EP92116363A EP92116363A EP0534429B1 EP 0534429 B1 EP0534429 B1 EP 0534429B1 EP 92116363 A EP92116363 A EP 92116363A EP 92116363 A EP92116363 A EP 92116363A EP 0534429 B1 EP0534429 B1 EP 0534429B1
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EP
European Patent Office
Prior art keywords
weft
yarn
weft yarn
selvedge
tucked
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EP92116363A
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English (en)
French (fr)
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EP0534429A1 (de
Inventor
Ettore Viscardi
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Promatech SpA
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SOMET Societa Meccanica Tessile SpA
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    • 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 concerns a method to form a tucked-in selvedge in shuttleless looms and, particularly, a method forming the tucked-in selvedge by exclusively pneumatic means allowing to fold back the weft tails into the shed.
  • the present invention also concerns a device to form a tucked-in selvedge in shuttleless looms, particularly suited to allow carrying out said method.
  • This type of lateral finish of the fabric is acceptable in some cases, but it cannot generally be accepted for good quality fabrics which require the free ends of the weft yarns - normally called tails - to be more firmly fastened. This is obtained for example by inserting again the weft tails into the shed soon after the weft has been beaten up, and thus forming the so-called "tucked-in selvedge", which eliminates the need to fasten the selvedge of the fabric with the more complicated slotted leno heald weave, obtained by twisting the lateral warp yarns.
  • the tail of an inserted and beaten up weft must be at once folded back into the shed, as soon as the latter has opened again, so as to be newly beaten up therein and be fastened together with the following weft.
  • the known methods to form the tucked-in selvedge normally operate with fixed devices, positioned to the side of the beating up line, whereby, in order to operate on the weft delivery side, they require cutting of the reed, which means that the width of the reed has to be reduced to the actual width of the cloth being woven, when said width is below the maximum width of the loom.
  • Reed cutting obviously involves the need for a long operation to readapt the reed, whenever starting to weave a new article.
  • the present invention therefore proposes a method, as well as a device to carry out said method, allowing to form a high-quality tucked-in selvedge, while operating at high speed and merely with the use of pneumatic devices.
  • Another object of the present invention is to supply a method and a device allowing to form the tucked-in selvedge, both on the weft feeding and on the weft delivery side, without having to in the least modify any of the loom components, and particularly the reed.
  • a further object of the present invention is to supply a method and a device as specified heretofore, allowing to form a high-quality tucked-in selvedge both on air looms and on gripper looms.
  • step b) is replaced by the following step:
  • Said method is preferably carried out with a device comprising air suction means and yarn cutting means, independently apt to perform cyclic movements between: a first position in which said air suction means are adjacent to the weft yarn and to the reed, and said yarn cutting means are in a rest position not interfering with the reed when this latter is beating up the weft yarn; a second position in which said cutting means are moved close to the weft yarn so as to cut the same, and said suction means remain in their previous position so as to suck in the free weft tail as the reed is leaving the beating up position; and a third position in which said suction means are at the side of the open shed so as to insert said weft tail, which is launched therein by reversing the air stream inside said suction means, while the reed is far from the beating up position.
  • said device comprises: fixed yarn cutting means; air suction means apt to perform a cyclic movement between a first position adjacent to the weft yarn as the same is being cut, so as to suck in the free weft tail, and a second position at the side of the open shed, so as to insert said weft tail which is launched therein by reversing the air stream inside said suction means, while the reed is far from the beating up position; and a screen interposed between said air suction means and the yarn launching nozzles, as the weft yarn is being cut, comprising means to house the weft yarn therein.
  • weft insertion takes place by launching the weft yarn, by means of a main nozzle, into the shed formed by the opened-up warp yarns; the weft is fed through said nozzle from weft yarn feeding devices positioned upstream thereof.
  • the main nozzle is formed by a set of pipes and takes up the configuration of a gun 1, as shown in fig. 1. While launching a weft yarn 2, the respective nozzle is fed with a high-pressure air stream, so as to launch said weft yarn into the launching channel 3, formed by suitable notchings provided in the central part of the single blades forming the reed 4.
  • the weft yarn is then conveyed through the channel 3 by pneumatic devices (which need not be described in detail herein) until it reaches the opposite side of the loom.
  • the same yarn feeding device, positioned upstream of the gun 1, then provides to stop the weft yarn 2 after having fed an amount of yarn sufficient to cross the loom.
  • the reed 4 starts its beating up movement towards the cloth T being woven, leading the launched weft yarn 2 into engagement therewith.
  • the yarn 2 must be kept perfectly tense - whereby it is not cut until reed beating up has taken place - and also perfectly straight, and this is obtained by shifting the gun 1 in alignment with the reed 4, of which it follows the oscillating movement.
  • the gun 1 blows out a constant air jet in the direction of the cloth being woven, said air jet being more powerful when launching a weft yarn and less powerful after the same has been launched, during closing and reopening of the shed.
  • the tucked-in selvedge is formed on the fabric by folding back the weft tails projecting therefrom, soon after the weft has been beaten up, and by newly inserting said weft tails into the shed which has just opened again.
  • this is obtained by means of a suction and blowing nozzle 5, the free end of which is perpendicular to the longitudinal axis of the loom, i.e. parallel to the direction of the weft yarn launched into the shed.
  • the nozzle 5 comprises, close to its free end, a longitudinal slit 5a opening towards the weft yarn 2 (fig. 4) and meant to facilitate suction of the weft tail into the nozzle 5 when said weft yarn is cut by the cutter 6.
  • the weft yarn sucked into the nozzle 5 is subsequently launched by said nozzle - which has switched onto the blowing function after having been shifted towards the reed - to allow inserting the weft tail into the newly opened shed.
  • the weft yarn 2 To be sure that the weft tail is positively sucked into the nozzle 5, it is first of all necessary for the weft yarn 2 to be cut only when it has practically reached the slit 5a of the nozzle 5; moreover, the weft yarn should not be tensioned or irregularly deviated as cutting takes place, since this would make it unsteady after cutting, whereby the nozzle 5 would have difficulties in correctly performing its functions and, in any case, the length of the weft tails - and thus the width of the selvedge being formed therewith - would not be constant.
  • the method according to the present invention proposes to screen said air jet by interposing, between the gun 1 and the nozzle 5, a protection screen apt to prevent the air blown from the gun 1 from interfering with the tails of the weft 2.
  • Said protection screen can be set in a fixed position, in correspondence of the position taken up by the weft 2 at the moment of its cutting, or it can be movable into said position - simultaneously with and in a direction opposite to the weft 2 - from a position where its presence is not likely to disturb the operation of weft insertion.
  • the screen also comprises means to house the weft yarn therein during reed beat-up, so as to preferably avoid any deviations or tensioning thereof, or anyhow reduce these phenomena to a minimum, reproducing them to the same extent for each weft.
  • Said means - which should of course preserve, or only slightly reduce, the effectiveness of the screen - preferably consist of a V-shaped notching, formed in said screen and opening towards the weft yarn, with axis coinciding with the weft trajectory as reed beat-up takes place.
  • a first embodiment of said screen is illustrated in figs. 1 and 2: it consists of a lamina 7 - with a V-shaped notching 7a on the side facing the weft yarn 2 - positioned between the gun 1 and the nozzle 5, so as to deviate far from this latter most of the air blown out from said gun, when weft yarn cutting takes place.
  • the gun 1 is not screened by the lamina 7, either because the stroke of the reed 4 is of sufficient amplitude to shift said gun beyond the outer edge of the lamina 7, or because this latter is in turn apt to perform a reciprocating movement in the direction opposite to that of the reed 4, and thus moves away from the yarn cutting area during opening of the shed.
  • the gun 1 has moved in the direction of arrow F, together with the reed 4 and the weft yarn 2 inserted in the shed, while the lamina 7 has possibly moved in the opposite direction G.
  • the depth of the V notching 7a can be adjusted so that, at the end of reed beat-up, the vertex of said notching is perfectly aligned with the gun 1 (whereby the weft yarn 2 is straight and not tensioned) - as shown in fig. 2B - or it can be adjusted so that the gun 1 is totally screened by the solid part of the lamina 7 (whereby the weft yarn 2 is slightly deviated and tensioned) - as shown in fig. 2A.
  • Reference 1l indicates the position of the gun 1, in respect of the lamina 7, when the weft yarn is launched into the shed, while reference 1t indicates the position taken up by the gun 1, in respect of the lamina 7, when yarn cutting takes place.
  • the drawings clearly show how, in this last position, the air jet blown from the gun 1 is totally screened by the lamina 7 in the embodiment of fig. 2A, and almost totally screened in the embodiment of fig. 2B.
  • the first arrangement (fig. 2A) should be adopted with particularly light and delicate yarns - which cannot even tolerate the slight puff of residual air likely to pass through the slit 7a - even if said yarns have to be slightly tensioned.
  • the second arrangement (fig. 2B) can advantageously be adopted with stronger weft yarns, for which the already considerable screening action - provided by the lamina 7 in correspondence of the vertex of its slit 7a - is more than enough.
  • the tensioning imparted on the weft yarn 2, in the arrangement of fig. 2A, is in any case not only very slight but also perfectly uniform for each weft yarn, both in its direction and in its value, considering that the position of the weft yarn is univocally determined by the vertex of the notching 7a. Said tensioning thus has no negative effects on the selvedge being formed, but only slightly increases its width (the weft tails being cut when the yarn is in a deviated position are in fact slightly longer than those cut on the yarn in a straight position).
  • the nozzle 5 is apt to perform a rectilinear reciprocating movement in a direction parallel to the longitudinal axis of the loom, and its position is adjusted so that, when the fixed cutter 6 cuts off the weft, the nozzle 5 - and particularly its slit 5a - is already very close to the weft yarn 2, so that this latter is perfectly stable and is at once sucked into said nozzle during the suction step, as soon as cutting has been performed.
  • the nozzle 5 is shifted in the direction G, until it takes up a suitable position facing the open shed, into which it provides to reinsert the weft tail thanks to reversal of the air stream blowing inside the same.
  • Figs. 3, 4 and 5 illustrate a second embodiment of the device to carry out the method of the present invention, always on the inlet side of an air loom.
  • the screen still consists of a lamina 8 comprising a V-shaped notching 8a, but said lamina is rigidly fixed to the nozzle 5, so that the vertex of the V ends in correspondence of the slit 5a of the nozzle 5.
  • the working of this second embodiment of the device is illustrated in fig. 5, which shows the different reciprocal positions of the reed 4, of the weft yarn 2 and of the lamina 8, when launching the weft (A), when reed beat-up takes place (B), and when yarn cutting is performed (C).
  • fig. 5 shows the different reciprocal positions of the reed 4, of the weft yarn 2 and of the lamina 8, when launching the weft (A), when reed beat-up takes place (B), and when yarn cutting is performed (C).
  • the screens formed by the laminae 7 and 8 can be used both singly and jointly, according to the type of yarn and to the working conditions, in order to obtain the strongest screening effect against the air jet blown from the gun 1.
  • the folding back of the weft tail is obtained - in a way similar to that previously described in relation to loom inlet - by means of a suction and blowing nozzle 9 (figs. 6 and 7), which is caused to advance towards the reed with an independent motion in respect of the cutter 10, up to moving quite close to the weft 2 and to the reed 4, keeping said weft steady thanks to the sucking action through a slit 9a, similar to the slit 5a of the previously described nozzle 5.
  • the cutter 10 is at rest, out of reach of the reed 4, as clearly shown in fig. 8.
  • the reed illustrated in this figure is of the type used on air looms, but the method of the present invention can obviously be equally applied in the case of plain reeds used on gripper looms.
  • the cutter 10 When the reed 4 has ended its beating up movement and starts its backward stroke, the cutter 10 is shifted in the direction of the weft 2 in order to cut the same, while said weft is kept perfectly steady by the nozzle 9. After cutting, the weft tail is at once sucked into the nozzle 9, which then moves to position 9' to reinsert the weft tail, while the cutter 10 moves back to its rest position.
  • the weft yarn would be deviated by the nozzle 9 into the position 2'', allowing the cutting to be performed only in 11'', instead of 11, with consequent unsteadiness of the weft upon cutting thereof and great difficulty in leading said weft to be sucked in the nozzle 9.
  • the deviation imparted by the nozzle 9 would be quite casual and irregular, the length of the weft tails and thus the width of the selvedge formed therewith would be quite uneven.
  • the reciprocating movements of the cutting means and of the nozzles to form said selvedge can be performed - in known manner - by means of mechanical devices connected to the general motion of the loom.
  • the movements of the nozzle 9 and of the cutter 10 positioned at loom outlet - which are regulated, as previously seen, by different laws - can of course be controlled by suitable kinematic mechanisms.
  • a satisfactory solution of this type, which allows to regulate both the amplitude and the phase of said two movements in a reciprocally independent way, is that illustrated by way of example in fig. 9.
  • a first embodiment is shown in fig. 9.
  • the loom is diagrammatically represented therein by the reed 4 and by the open shed of the warp yarns W.
  • Both the nozzle 9 and the cutter 10 are mounted at the ends of respective movable sliders 12 and 13, caused to move by fully similar kinematic mechanisms briefly described hereinafter.
  • the shafts 14 and 15 are directly controlled by the general motion of the loom and transmit said motion to the cams 16 and 17 by way of flanges 18 and 19 fixed thereto by screws 20 and 21 housed into slots 22 and 23. By shifting the locking position of the screws 20 and 21, one obviously modifies the phase of the movement of the two kinematic mechanisms in respect of the motion of the loom.
  • the cams 16 and 17 cause the oscillation, through a suitable cam-follower, of levers 24 and 25 which are in turn apt, through link rods 26 and 27, to cause the rectilinear reciprocating movement of the sliders 12 and 13.
  • the amplitude of said movement can be independently regulated by shifting the pivoting point between the levers 24, 25 and the link rods 26, 27, along slots 28 and 29 formed in said levers.
  • the cutting action of the cutter 10 - when this latter has reached the cutting position 11 - is instead determined by a fixed profile 30.
  • Reference 9' indicates, also in this figure, the end-of-stroke position of the nozzle 9, namely the position in which the weft tail is inserted again into the open shed.
  • FIG. 10 illustrates the device to form the tucked-in selvedge at loom inlet, comprising the motor means apt to determine the wanted movements of its movable parts.
  • Said motor means preferably consist of pneumatic or electromagnetic linear actuators.
  • the first ones are actually preferred owing to their numerous positive characteristics: they can in fact work up to very high frequencies and can thus be used also on high-speed looms; they require only very little maintenance; they use up as power source the compressed air already existing in the loom, the consumption of which is thus optimized; they allow, by regulating the value of the counterpressure in their cylinder (to simplify things, the circuit feeding compressed air of counterpressure has not been illustrated in the drawings), to modify the piston motion law to the desired extent; and, finally, they involve limited costs.
  • the suction and blowing nozzle 5 is moved forward and backward - in the manner described heretofore - by a linear actuator 31, while a second linear actuator 32 controls the cutting movement of the fixed cutter 6.
  • the working stroke of said actuators can be varied within certain limits by changing the dimensions of the respective cylinder; apart from this, the movement determined by their piston rod can be suitably increased or reduced through known type linkages, eventually adjustable.
  • the opening and closing of the pneumatic circuits of actuators 31 and 32 is controlled by respective solenoid valves 33 and 34, electrically connected to the central processing unit controlling the loom. In this way, the working of actuators 31 and 32 can be programmed at will by simply introducing suitable software into said processing unit.
  • Similar solenoid valves 35 and 36 control the sucking and blowing functions of the nozzle 5.
  • the solenoid valve 35 directly controls the feeding of compressed air into the nozzle 5, through a connection block 37, in order to produce the blowing jet.
  • the solenoid valve 36 feeds instead compressed air into a Venturi tube 36, to which are connected - in correspondence of the lowest pressure zone - the nozzle 5 through a pipe 39, as well as said connection block 37, in order to produce the suction jet.
  • the arrangement of the device to form the tucked-in selvedge at loom outlet, shown in fig. 11, is specularly identical to that described heretofore.
  • the reciprocating movement of the suction and blowing nozzle 9 is controlled by a linear actuator 41, while the cutting movement of the cutter 10 is controlled by a linear actuator 42, said actuators being operated by respective solenoid valves 43 and 44.
  • the suction and blowing jet of the nozzle 9 is determined by the alternate operation of the solenoid valves 45 and 46, the first of which is directly connected to a block 47 to which is pneumatically connected the nozzle 9, while the second one is connected to a Venturi tube 48, the throttled part of which is pneumatically connected to said block 47 by way of a pipe 49.
  • the cutting means 10 have to move independently from the nozzle 9, whereby the body of the actuator 42 is not connected directly to the loom structure but to a slide 50 movable on a horizontal plane between a working position and a rest position.
  • the movement of the slide 50 is determined by a further linear actuator 51, controlled by a solenoid valve 52.
  • the slide 50, the actuator 51 and the solenoid valve 52 are drawn in dashes, to indicate that their presence is indispensable only when the loom is working with different cloth widths, so as to avoid having to cut the reed.
  • the device to form the tucked-in selvedge according to the present invention is perfectly symmetrical on both sides of the loom.
  • the method of the present invention has fully reached the intended purpose. It can in fact be carried out by means of very simple and economic devices, it requires no modifications of the loom or of the reed when having to vary the width of the cloth being woven, and it allows to obtain a tucked-in selvedge which is perfectly uniform and has no loose unfolded weft tails. This result can moreover be obtained also on high-speed looms, thanks to the fact that the devices required to carry out the method according to the invention are all of very modest dimensions and can thus be set in reciprocating motion at high speeds, without creating any problems.

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Claims (23)

  1. Verfahren zum Bilden eines umgeschlagenen Saums in schützenlosen Webmaschinen mit Mitteln zum Eintragen des Schußfadens (2) in das Fach, einem Blatt (4) zum Aufschlagen des so eingetragenen Schußfadens (2) und Mitteln zum Schneiden des Schußfadens - von der Art, bei der der Schußfaden (2) mit einem Abstand von dem ersten und dem letzten Kettfaden (W) geschnitten wird, der ausreichend ist, um freie Schußfadenenden zu bilden, die wieder in das Fach eingetragen werden, um gemeinsam mit dem nachfolgenden Schußfaden aufgeschlagen zu werden - wobei das Verfahren nacheinander die folgenden Schritte beinhaltet, die nach dem Schließen des Fachs und bevor der Eintrag eines neuen Schußfadens stattfindet, auszuführen sind:
    a) Heranführen eines Luftsaugmittels (5, 9) an den ungeschnittenen Schußfaden (2), während das Blatt (4), in einer Aufschlagposition ist;
    b) Heranführen des Schneidmittels (6, 10) an den Schußfaden (2), während das Blatt (4) die Aufschlagposition verläßt, wobei das Saugmittel (5, 9) benachbart zu dem Schußfaden (2) gehalten wird;
    c) Schneiden des Schußfadens (2) mittels des Schneidmittels (6, 10), was das Einsaugen des Schußfadenendes in das Saugmittel (5, 9) erlaubt;
    d) Bewegen des Saugmittels (5, 9) in eine Zone, die zu dem offenen Fach weist, wo das freie Schußfadenende wieder eingetragen wird; und
    e) Umkehren des Luftstroms im Inneren des Saugmittels (5, 9), um so das Schußfadenende in das Fach einzubringen.
  2. Verfahren zum Bilden eines umgeschlagenen Saums in einer Luft-Webmaschine mit einer oder mehreren Fadeneintragdüsen (1) zum Eintragen des Schußfadens (2) in ein Fach, ein Blatt (4) zum Aufschlagen des derart eingetragenen Schußfadens (2) und Mittel zum Schneiden des Schußfadens - von der Art, bei dem der Schußfaden (2) mit einem Abstand von dem ersten und dem letzten Kettfaden (W) geschnitten wird, der ausreichend ist, um freie Schußfadenenden zu bilden, die wieder in das Fach eingetragen werden, um gemeinsam mit dem nachfolgenden Schußfaden aufgeschlagen zu werden - wobei das Schneidmittel auf der Seite, auf der der Schußfaden eingetragen wird, fest ist und das Verfahren nacheinander die folgenden Schritte aufweist, die nach dem Schließen des Fachs und bevor ein neues Eintragen eines Schußfadens stattfinden, auszuführen sind:
    a) Heranführen von Luftsaugmitteln (5, 9) zu dem ungeschnittenen Schußfaden (2), während das Blatt (4) in einer Aufschlagposition ist;
    b) Halten des Saugmittels (5, 9) benachbart zu dem Schußfaden (2), wenn das Blatt (4) die Aufschlagposition verläßt, während
    b1) auf der Schußfadeneintragseite der Luftstrom, der von den Eintragdüsen (1) abgeblasen wird, abgedeckt wird; und
    b2) auf der Schußfadenübergabeseite sich das Schneidemittel (10) dem Schußfaden (2) annähert,
    c) Schneiden des Schußfadens (2) mittels des Schneidmittels (6, 10), um es zu erlauben, daß das Schußfadenende in das Saugmittel (5, 9) eingesaugt wird;
    d) Bewegen des Saugmittels (5, 9) in eine Zone, die zu dem offenen Fach weist, während das freie Ende des Schußfadens wieder eingetragen wird; und
    e) Umkehren des Luftstroms im Inneren des Saugmittels (5, 9), um das Ende des Schußfadens in das Fach einzutragen.
  3. Verfahren zum Bilden eines umgeschlagenen Saums nach Anspruch 1 oder 2, wobei das Luftsaugmittel aus einer Saug- und Blasdüse (5, 9) besteht, dessen freies Ende parallel zu dem Schußfaden (2) verläuft.
  4. Verfahren zum Bilden eines umgeschlagenen Saums nach Anspruch 3, wobei die Saug- und Blasdüse (5, 9) nahe ihrem freien Ende einen Längsschlitz (5a, 9a), der sich in Richtung auf den Schußfaden (2) öffnet, aufweist.
  5. Verfahren zum Bilden eines umgeschlagenen Saums nach Anspruch 2, wobei der Schritt (b') unter Verwendung einer Abschirmung ausgeführt wird, die aus einem Blatt (7, 8) besteht, das zwischen den Fadeneintragdüsen (1) und dem Luftsaugmittel (5) angeordnet ist und eine V-förmige Kerbe (7a 8a) aufweist, die sich in Richtung auf den Schußfaden (2) öffnet.
  6. Verfahren zum Bilden eines umgeschlagenen Saums nach Anspruch 5, wobei die Position des Blatts (7, 8) derart ist, daß sich der Schußfaden bei dem Schneiden des Schußfadens (2) an der Spitze der V-förmigen Kerbe (7a, 8a) befindet und der Luftstrom, der von den Eintragdüsen (1) ausgeblasen wird, vollständig oder nahezu vollständig von dem festen Teil des Blatts (7, 8) abgedeckt wird.
  7. Verfahren zum Bilden eines umgeschlagenen Saums nach Anspruch 5 oder 6, wobei das Blatt (7) zwischen einer Ruheposition, die von den Eintragdüsen (1) weit entfernt ist und einer Arbeitsposition, in der es zwischen den Eintragdüsen (1) und dem Luftsaugmittel (5) angeordnet ist, beweglich ist.
  8. Verfahren zum Bilden eines umgeschlagenen Saums nach Anspruch 4, 5 oder 6, wobei das Blatt (8) fest mit der Saug- und Blasdüse (5) verbunden und mit dieser beweglich ist.
  9. Verfahren zum Bilden eines umgeschlagenen Saums nach Anspruch 3, wobei das freie Ende der Saug- und Blasdüse (9) dazu eingerichtet ist, von dem Eintragkanal (3) des Blatts (4) aufgenommen zu werden.
  10. Vorrichtung zum Bilden eines umgeschlagenen Saums in einer schützenlosen Webmaschine mit Mitteln zum Eintragen des Schußfadens (2) in das Fach, einem Blatt (4) zum Aufschlagen des so eingetragenen Schußfadens (2) und Mittel zum Schneiden des Schußfadens - von der Art, bei dem der Schußfaden (2) mit einem Abstand von dem ersten und dem letzten Kettfaden (W) geschnitten wird, der ausreichend ist, um freie Schußfadenenden zu bilden, die wieder in das Fach eingetragen werden, um in diesem gemeinsam mit dem nachfolgenden Schußfaden aufgeschlagen zu werden - wobei die Vorrichtung Luftsaugmittel (5, 9) und Garnschneidmittel (6, 10) aufweist, die dazu eingerichtet sind, unabhängig voneinander zyklische Bewegungen auszuführen zwischen: einer ersten Position, während das Blatt (4) in seiner Aufschlagposition ist, in der das Luftsaugmittel (5, 9) dem Schußfaden (2) und dem Blatt (4) benachbart ist und das Fadenschneidmittel (6, 10) in einer Ruheposition, in der sie das Blatt (4) nicht stört, ist; einer zweiten Position, während der das Blatt (4) die Aufschlagposition verläßt, in der der das Schneidmittel (6, 10) nahe zu dem Schußfaden (2) bewegt wird, um dieses zu schneiden, und das Saugmittel (5, 9) in ihrer zuvor eingenommenen Position verbleiben, um das freie Ende des Schußfadens anzusaugen und einer dritten Position, während der das Blatt (4) weit von der Aufschlagposition entfernt ist, in der die Saugmittel (5, 9) an der Seite des offenen Fachs sind, um den Schußfaden einzutragen, der in diesen durch Umkehren des Luftstroms im Inneren des Saugmittels (5, 9) eingetragen wird.
  11. Vorrichtung zum Bilden eines umgeschlagenen Saums in einer Luft-Webmaschine mit einer oder mehreren Fadeneintragdüsen (1) zum Eintragen des Schußfadens (2) in das Fach, einem Blatt (4) zum Aufschlagen des so eingetragenen Schußfadens (2) und mit Schußfadenschneidmitteln - von der Art, bei der der Schußfaden (2) mit einem Abstand von dem ersten und dem zweiten Schußfaden (W) geschnitten wird der ausreichend ist, um freie Schußfadenenden zu bilden, die wieder in das Fach eingetragen werden, um in diesem gemeinsam mit dem nachfolgenden Schußfaden aufgeschlagen zu werden, - wobei die Vorrichtung
    an der Schußfadeneintragseite der Webmaschine aufweist:
    feste Fadenschneidmittel (6); Luftsaugmittel (5), die dazu eingerichtet sind, eine zyklische Bewegung zwischen einer ersten Position, in der sie dem Schußfaden (2) benachbart sind, nachdem dieser eingetragen und bevor dieser geschnitten worden ist, um so das freie Ende des Schußfadens anzusaugen, und einer zweiten Position, in der sie an der Seite des offenen Fachs sind, um so das Schußfadenende, das in diesen durch Umkehren des Luftstroms in das Innere des Saugmittels (5) eingetragen worden ist, einzutragen, wenn das Blatt (4) weit von der Schlagposition entfernt ist, auszuführen; und eine Abschirmung (7, 8), die zwischen dem Luftsaugmittel (5) und den Fadeneintragdüsen (1), wenn der Schußfaden (2) geschnitten ist, mit Mitteln zum Aufnehmen des Schußfadens (2) in diesem, angeordnet; und
    an der Schußfadenübergabeseite aufweist:
    Luftsaugmittel (9) und Garnschneidmittel (10), die unabhängig voneinander dazu eingerichtet sind, zyklische Bewegungen zwischen einer ersten Position, während der das Blatt (4) in seiner Aufschlagposition ist, in der die Luftsaugmittel (9) den Schußfaden (2) und dem Blatt (4) benachbart sind, und die Fadenschneidmittel (10) in einer Ruheposition sind, in der sie das Blatt (4) nicht stören; einer zweiten Position, während der das Blatt (4) seine Aufschlagposition verläßt, in der die Schneidmittel (10) nahe zu dem Schußfaden (2) bewegt werden, um diesen so zu schneiden, und die Saugmittel (9) in ihrer zuvor eingenommenen Position verbleiben, um so das freie Ende des Schußfadens anzusaugen und einer dritten Position, während der das Blatt (4) weit von seiner Aufschlagposition entfernt ist, in der die Saugmittel (9) auf der Seite des offenen Fachs sind, um so das Schußfadenende einzutragen, das in dieses durch Umkehren des Luftstroms im Inneren des Saugmittels (9) eingetragen wird, auszuführen.
  12. Vorrichtung zum Bilden eines umgeschlagenen Saums nach Anspruch 10 oder 11, wobei die Luftsaugmittel aus einer Saug- und Blasdüse (5, 9) bestehen, deren freies Ende parallel zu dem Schußfaden (2) verläuft.
  13. Vorrichtung zum Bilden eines umgeschlagenen Saums nach Anspruch 12, wobei die Saug- und Blasdüse (5) nahe ihrem freien Ende einen Längsschlitz (5a), der sich in Richtung auf den Schußfaden (2) öffnet, aufweist.
  14. Vorrichtung zum Bilden eines umgeschlagenen Saums nach Anspruch 11, wobei die Abschirmung aus einem Blatt (7, 8) besteht, die zwischen den Fadeneintragdüsen (1) und den Luftsaugmitteln (5) angeordnet ist und das Mittel zum Aufnehmen des Schußfadens (2) aus einer V-förmigen Kerbe (7a, 8a) besteht, die in dem Blatt (7, 8) gebildet ist und sich in Richtung auf den Schußfaden (2a) öffnet.
  15. Vorrichtung zum Bilden eines umgeschlagenen Saums nach Anspruch 5, wobei die Position des Blatts (7, 8) derart ist, daß bei dem Schneiden des Schußfadens (2) die letztere sich an der Spitze der V-förmigen Kerbe (7a, 8a) befindet und der Luftstrom, der von den Eintragdüsen (1) ausgeblasen wird, vollständig oder nahezu vollständig von dem festen Teil des Blatts (7, 8) abgedeckt wird.
  16. Vorrichtung zum Bilden eines umgeschlagenen Saums nach Anspruch 14 oder 15, wobei das Blatt (7) zwischen einer Ruheposition, die von den Eintragdüsen (1) weit entfernt ist und einer Arbeitsposition, in der sie zwischen den Eintragdüsen (1) und dem Luftsaugmittel (5) angeordnet ist, beweglich ist.
  17. Vorrichtung zum Bilden eines umgeschlagenen Saums nach Anspruch 14 oder 15, wobei das Blatt (8) fest mit der Saug- und Blasdüse (5) verbunden und mit dieser beweglich ist.
  18. Verfahren zum Bilden eines umgeschlagenen Saums nach Anspruch 12, wobei das freie Ende der Saug- und Blasdüse (9) dazu eingerichtet ist, von dem Eintragkanal (3) des Blatts (4) aufgenommen zu werden.
  19. Vorrichtung zum Bilden eines umgeschlagenen Saums nach einem der Ansprüche 10 bis 18, wobei die zyklischen Bewegungen des Luftsaugmittels (5 9) und des Garnschneidmittels (6, 10) als auch die Schneidbewegung des Schneidmittels (6, 10) über unabhängige kinematische Nocken- und Gelenkstangen-Mechanismen (12-13, 16-18, 24-25, 26-27, 30) von dem Hauptantrieb der Webmaschine gesteuert werden.
  20. Vorrichtung zum Bilden eines umgeschlagenen Saums nach Anspruch 19), wobei die Amplitude und die Phase der Bewegungen unabhängig voneinander durch elektrische Einstellmittel (20-21, 28-29) eingestellt werden können.
  21. Vorrichtung zum Bilden eines umgeschlagenen Saums nach einem der Ansprüche 10 bis 18, wobei die zyklischen Bewegungen des Luftsaugmittels (5, 9) und des Garnschneidmittels (6, 10) als auch die Schneidbewegung der Schneidmittel (6, 10) unabhängig durch pneumatische oder elektromagnetische Linearaktuatoren (31-32, 41-42, 51) gesteuert werden, die über eine Datenverarbeitungseinheit programmiert werden können.
  22. Vorrichtung zum Bilden eines umgeschlagenen Saums nach Anspruch 21, wobei die Linearaktuatoren (31-32, 41-42, 51) pneumatisch betrieben werden und die Amplitude, die Phase und das Bewegungsgesetz dieser Bewegungen unabhängig eingestellt werden können mittels mechanischer Einstellmittel, durch Programmieren einer Datenverarbeitungseinheit und durch Einstellen des Gegendrucks in dem Zylinder der Betätigungselemente.
  23. Vorrichtung zum Bilden eines umgeschlagenen Saums nach einem der Ansprüche 10 bis 22, wobei der Saugstrahl der Saug- und Blasdüse (5, 9) durch Verwenden des Unterdrucks, der durch eine Venturi-Düse (38, 48) gewonnen wird, die mit einem Hochdruck-Luftstrahl gespeist wird, gewonnen wird.
EP92116363A 1991-09-23 1992-09-23 Verfahren zum Herstellen einer Einlegekante in schützenlosen Webmaschinen, insbesondere Luftwebmaschinen, und Vorrichtung zum Durchführen des Verfahrens Expired - Lifetime EP0534429B1 (de)

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ITMI912525A IT1251849B (it) 1991-09-23 1991-09-23 Metodo per la formazione della cimossa rientrata in telai senza navetta ed in particolare in telai ad aria e dispositivo per realizzare tale metodo
ITMI912525 1991-09-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101974682B1 (ko) 2012-01-24 2019-05-02 나이키 이노베이트 씨.브이. 제직 마감 장치

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4424271C1 (de) 1994-07-09 1995-06-29 Dornier Gmbh Lindauer Luftwebmaschinen mit Kantenniederhalter
DE19548846C1 (de) * 1995-12-27 1996-10-10 Dornier Gmbh Lindauer Verfahren und Vorrichtung zum Einlegen eines Schußfadens
JPH1161599A (ja) * 1997-08-05 1999-03-05 Tsudakoma Corp 流体噴射式織機の緯糸規制装置
DE19917953C1 (de) * 1999-04-21 2001-01-25 Dornier Gmbh Lindauer Pneumatisch betriebener Leistenleger für Webmaschinen
DE19924689C1 (de) 1999-05-28 2001-05-17 Dornier Gmbh Lindauer Verfahren zum Begrenzen der Webfachöffnung und Webfachbegrenzer
IT1316367B1 (it) * 2000-02-14 2003-04-10 Somet Soc Mec Tessile Metodo per la formazione della cimossa rientrata in telai ad aria edispositivo per attuare detto metodo
CN101492852B (zh) * 2008-01-21 2011-02-09 陈仲纪 剑杆织机节约材料的方法及装置
JP5309003B2 (ja) * 2009-11-30 2013-10-09 津田駒工業株式会社 無杼織機におけるタックイン方法及び装置
ITVI20110255A1 (it) 2011-09-22 2013-03-23 Ohg F Lli Manea S R L Dispositivo per la formazione di una cimossa rientrata del tessuto in telai senza navetta
KR101932313B1 (ko) 2012-01-24 2018-12-24 나이키 이노베이트 씨.브이. 다층 제직
WO2013112684A1 (en) 2012-01-24 2013-08-01 Nike International Ltd. Intermittent weaving splicer
TR201214450A2 (tr) * 2012-12-11 2014-06-23 Kordsa Teknik Tekstil As Bir otomatik yağlama mekanizması.
JP7140640B2 (ja) * 2018-11-07 2022-09-21 津田駒工業株式会社 空気噴射式織機におけるエアタックイン装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2267287A (en) * 1939-08-26 1941-12-23 Sulzer Ag Selvage forming device for looms

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2267187A (en) * 1940-03-25 1941-12-23 Bock Corp Control apparatus
LU63368A1 (de) * 1971-06-18 1973-01-22

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2267287A (en) * 1939-08-26 1941-12-23 Sulzer Ag Selvage forming device for looms

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101974682B1 (ko) 2012-01-24 2019-05-02 나이키 이노베이트 씨.브이. 제직 마감 장치

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ES2090442T3 (es) 1996-10-16
DE69211933T2 (de) 1996-11-28
ITMI912525A1 (it) 1993-03-23
ITMI912525A0 (it) 1991-09-23
IT1251849B (it) 1995-05-26
DE69211933D1 (de) 1996-08-08

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