US3430666A - Arrangement for transferring yarn on a weaving loom - Google Patents

Arrangement for transferring yarn on a weaving loom Download PDF

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Publication number
US3430666A
US3430666A US597284A US3430666DA US3430666A US 3430666 A US3430666 A US 3430666A US 597284 A US597284 A US 597284A US 3430666D A US3430666D A US 3430666DA US 3430666 A US3430666 A US 3430666A
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United States
Prior art keywords
yarn
shuttle
arrangement
aperture
loop
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Expired - Lifetime
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US597284A
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English (en)
Inventor
Alexis Freihofer
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Ruti Machinery Works Ltd
Maschinenfabrik Rueti AG
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Maschinenfabrik Rueti AG
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J3/00—Weavers' tools, e.g. knot-tying tools
    • D03J3/04—Shuttle-threading tools

Definitions

  • An arrangement for transferring weft yarn on a weaving loom which has a shuttle that introduces the yarn into the shed, which comprises a means that guides an end portion of a yarn to be transferred to the shuttle from one side of the shuttle through an aperture in the shuttle onto the other side, that also holds the yarn on the other side as a loop with its two halves extending from the other side through the aperture to the one side; and that allows the yarn to be drawn away therefrom by the shuttle when the shuttle is introduced into the shed.
  • This invention relates to an arrangement for transferring yarn on a weaving loom having a shuttle or like picking member which introduces weft yarn into the shed and which retains one end of the weft yarn in an aperture extending therethrough during picking of the yarn.
  • weaving systems are known in which the weft yarns are introduced into the shed as individual picks having a hairpin shape or the like by means of a shuttle.
  • the weft yarn is taken from a yarn supply arranged externally of the loom.
  • the yarn In gripper-type shuttles, gripper rods or the like picking members, the yarn must be transferred to a gripper, clip, or like retaining means.
  • a gripper, clip, or like retaining means In devices known for this purpose, one yarn end is displaced by a yarn guide to the gripper and is grasped thereby. In order to insure reliable grasping of the yarn, these transfer devices are required to operate with considerable precision. Similarly, exact positioning of the shuttle in its rest or yarn-receiving position is a necessary condition. In many cases, furthermore, a separate control means must be provided for actuating the retaining means.
  • this invention is characterized in that means are provided for guiding an end portion of the yarn to be transferred to the shuttle in the form of a loop from one side of the shuttle through the aperture onto the other side of the shuttle and for holding the yarn loosely in the form of a loop on the other side of the shuttle, said means allowing the yarn to be drawn away by the shuttle when the shuttle is introduced into said shed.
  • the arrangement according to the invention is thus distinguished from the known devices by its simplicity, sturdiness, and reliability.
  • severing is eifected directly at the selvedge.
  • this end should be grasped and guided towards the shuttle, i.e., outwardly relatively to the center of the loom.
  • guiding of the yarn end towards the exterior of the loom is made superfluous, and no return movement of a yarn guide is required.
  • FIGURE 1 is a plan view showing one preferred embodiment of the yarn transferring arrangement of the invention
  • FIGURE 2 is an elevation view of the arrangement shown in FIGURE 1;
  • FIGURE 3 is a plan view of the arrangement shown in FIGURE 1 at an instant when the shuttle has already travelled along a short distance of its path;
  • FIGURE 4 is an elevation view of the arrangement
  • FIGURE 5 is a cross-section, taken along the line VV in FIGURE 3;
  • FIGURE 6 is a schematic representation of a driving mechanism on the yarn transfer arrangement of the invention.
  • FIGURES 7 and 8 are a plan view and a sectional along the line VIII of FIGURE 8 respectively which further illustrate another embodiment of the invention.
  • a shuttle 12 is disposed on a sley 11 and is shown in its rest position on the righthand side of the loom.
  • the shuttle 12 is formed with an aperture 13 (see FIGURE 2) through which a weft yarn 14 can be passed as a loop having the loop halves 14a and 14b.
  • the free end of the yarn 14 is retained in a suction nozzle 15. From this suction nozzle 15, the yarn extends through the aperture 13 over a drawing-in means such as a hook 16 about which it is looped and against which it bears.
  • the yarn then extends through a yarnguiding eyelet 18 and a yarn brake 17 to a yarn supply bobbin (not shown). From FIGURE 2, it can be seen that the loop half 14a is located beneath the height of the hook 16 and the loop half 14b is above the height of the hook 16.
  • the shuttle 12 In order to prevent entanglement of the loop halves 14a and 1417 when the propulsion of the shuttle 12 commences, the shuttle 12 has a projection 20 which guides the lower loop half 14a into a curvatureshaped recess located under the projection 20 and the upper loop half .14! into the slot 21. During the picking of the weft yarn 14, the recess forms the rear wall of the aperture 13.
  • a yarn retaining arrangement is fitted in the shuttle 12.
  • the said yarn retaining arrangement comprises a cover plate 22, which serves as an abutment (which has been omitted in FIGURE 1 for the sake of clarity), and the plate 23 pretensioned or biased against the cover plate 22. Biasing of the plate 23 is effected by means of the spring 24. Guide or positioning pins are also provided for positioning the yarn over plate 23. These pins are designated by reference numeral 48 in FIGURE 7.
  • the hook 16 acts to lay a loop 14a, 1412 through the aperture 13. For this purpose, it is movable through the aperture 13, so as to grasp the yarn 14 which is tensioned before being drawn through the aperture 13 between the yarn guide 18 and the suction nozzle 15.
  • a rear wall or guide Disposed behind the shuttle 12 is a rear wall or guide having a lateral face which faces the shuttle and which is disposed in the plane of the reed (not shown). Since the rear wall or guide 30 is partly hidden in FIGURE 2 by the shuttle 12, an elevational view of it is shown in FIGURE 4.
  • the guide 30 is formed with a recess 31 having an upper horizontal boundary located at the level of the hook 16 which additionally serves as a carrier for the yarn. Furthermore, there is a second, shorter recess 32 separated from the recess 31 by a raised portion 33.
  • the recesses 31 and 32 are rounded rearwardly at the ends directed towards the hook 16, i.e., those facing away from the center of the loom.
  • the raised portion 33 forms a projection that extends towards the hook 16.
  • This design provides for clean separation of the loop halves 14a and 14b during the drawing of the weft yarn 14 into the shuttle 12.
  • the guide at this end consists only of the arms 34 and 35.
  • the hook 16 is first swivelled out of the position shown in the drawings through the aperture 13.
  • the yarn 14 is in a tensioned position between the suction tube 15, the yarn guide arrangement 18, and the yarn clip 17 in which it is retained.
  • the hook 16 After the hook 16 has swivelled forwardly through the aperture 13, it is positioned over the yarn 14 tensioned between the elements 15 and 18.
  • the yarn guide 18 moves upwardly and the hook 16 withdraws, grasping the yarn 14, again into its starting position.
  • the loop 14a, 14b is formed.
  • the shuttle is propelled from the right to the left.
  • FIGURE 3 shows the situation after the shuttle has moved towards the left by approximately a part of its length. Due to the movement of the shuttle 12 towards the left, the loop half 14b passes into the slot 21 in the shuttle. The loop half 14a passes into the curvature shaped recess disposed under the projection 20. Since the clip 17 is still closed, the yarn is drawn away about the curved portion of the hook 16. As this takes place, the end of the yarn 14 is drawn out of the suction nozzle 15 and the loop half 14b passes under the braking plate 23. This plate is pretensioned or biased only sufliciently toward plate 22 to enable the yarn, for as long as it is clamped by the clip 17, to slide through under the plate 22. This position of the yarn is shown in FIGURE 3.
  • the yarn end is just about to leave the aperture 13 in the shuttle 12.
  • the clip 17 opens. Consequently, further sliding of the yarn between plates 22 and 23 ceases and the weft yarn is drawn off from the supply bobbin (not shown) and drawn into the shed.
  • the posi- 4 tion of the yarn in the shuttle 12 during this yarn inserting phase is shown by the dot-dash line 14 in FIGURE 1.
  • the guide 30 is as hereto described, provided with a horizontally extending recess 31 the upper boundary of which is located at the level of the hook 16. By means of this recess, a free space is provided for the end portion of the yarn 14 travelling out of the aperture 13 in the shuttle and moving about the hook 16, so that no jamming of the yarn takes place.
  • shuttle 12 is provided in its side facing the guide wall 30 at the level of the retaining arrangement formed by plates 22 and 23 with a groove 60 for receiving the end of the yarn 14 during the travel of the shuttle.
  • a second recess 32 In order to facilitate the introduction of the yarn end into the groove 60 when the propulsion of the shuttle commences, there is advantageously formed in the guide 30 a second recess 32, the lower boundary of which is located at the height of the hook 16.
  • the two recesses 31 and 32 are separated by the raised portion 33. As shown in the FIGURES 1 through 4 it is advantageous to considerably extend the raised portion 33 in the direction away from the loom center. By this construction, clean separation of the loop halves 14a and 14b during the propulsion of the shuttle 12 is improved and the possibility of the loop halves becoming entangled with each other is also decreased.
  • the plate 35 also improves the guiding of the yarn end or of the loop half 14a.
  • This plate extends (as can best be seen in FIGURE 5) substantially horizontally.
  • the projection 20 in the shuttle 12 also serves for the clean separation of the yarn halves 14a and 14b. It is furthermore desirable to attach on the arm 34, below the book 16, a fur element or the like fibrous material having hairs or fibers which extend up to the height of the hook 16 and thus surround the loop formation on the hook 16. By this means, further improvement in the yarn travel is achieved, as it is drawn out about the hook 16 which acts as a carrier.
  • FIGURE 6 further illustrates an advantageous embodiment of the drive produced by the movement of the sley and shows the schematic arrangement of the sley 11, the shuttle 12, the hook 16, the rear guide 30, the suction nozzle 15, the eyelet 18, the clip 17, and also the yarn 14. Furthermore, the figure shows a reed 54 secured to the sley 11.
  • the hook 16 is carried by one arm of a two-armed linkage 51 which is pivotal about the pivot 50 and which carries a roller 52 on its other arm. The pivot 50 is secured to the sley 11.
  • FIGURE 7 shows again the rear wall or guide heretofore described which has been omitted from FIGURE 8 for the sake of clarity.
  • the means for grasping or guiding the weft yarn 14 to be picked is formed by the pusher rod 42 provided with a pair of retaining arms and 41.
  • the rod is fast with a part of the loom.
  • the retaining arms 40 and 41 are spaced apart so that a carrier 43 can be moved therethrough.
  • the carrier 43 has a hook-shaped end 44.
  • the carrier 43 is secured to the sley 11 by means of the support means 45, shown only diagrammatically in FIGURE 8.
  • a roller 47 travelling on a guide cam 46 is provided on the carrier.
  • the guide cam 46 and also the suction nozzle 15 are fast on the loom.
  • the weft yarn 14 is transferred to the retaining arms 40 and 41 when the sley 11 is in its rearward position.
  • the yarn 14 then extends from its free end positioned in the suction nozzle 15 over the retaining arms 40 and 41 through the yarn guiding eyelet 18 to the yarn clip 17 (not shown) and from there to the yarn supply.
  • the sley 11 with the shuttle which has meanwhile arrived in its rest position, moves into its foremost position (shown in FIGURES 7 and 8), the yarn 14 is pushed through the aperture 13 in the shuttle 11 thus forming the loop 14a and 14b.
  • the guide cam 46 produces a downward movement of the carrier 43 which moves together with the sley.
  • the shuttle 12 is again propelled.
  • the end portion of the yarn 14 is drawn over the carrier 43 and guided into the retaining arrangement formed by plates 22 and 23 of the shuttle 12 (see FIGURE 2) and finally retained by the shuttle during the picking of the yarn through the shed. This procedure takes place exactly as heretofore described.
  • An arrangement for transferring weft yarn on a weaving loom which has a shuttle that introduces the yarn into the shed and that retains the yarn in an aperture extending transversely therethrough during the picking operation, said arrangement comprising means for guiding an end portion of the yarn to be transferred to the shuttle in the form of a loop from one side of the shuttle through the aperture in the shuttle onto the other side of the shuttle and for holding the yarn loosely on the other side of the shuttle in the form of a loop having two halves extending from said other side through the aperture to said one side, said means allowing the end portion of the yarn to be drawn away therefrom by the shuttle when the shuttle is introduced into said shed.
  • said means comprises a drawing-in means for drawing the yarn through said aperture in the form of a loop, said drawing-in means being adapted to move from a starting position on the other side of the shuttle through the aperture in the shuttle onto said one side thereof, to engage said yarn and then to move back into its starting position on said one side, whereby said yarn is drawn through said aperture, the drawing-in means serving, upon return to its starting position, as a carrier having saidyarn looped about it prior to introduction of the shuttle into said shed.
  • said means comprises a pusher rod adapted to be displaced from one side of the shuttle through the aperture to the other side of the shuttle and adapted to be moved back through said aperture, the rod having retaining means at its end for pushing the yarn end portion through the aperture and a carrier disposed on the other side of said shuttle being movable relatively to said retaining means for receiving the end portion of the yarn from said retaining means whereby a loop of yarn is formed about said carrier.
  • said shuttle has a slot extending therethrough from its aperture in the direction opposite to the travel of the shuttle during introduction of the weft yarn and leading to a yarn retaining arrangement, said shuttle also having a projection extending from one boundary of the slot which extends into the aperture and which is arranged between the slot and that wall of the aperture forming its rear wall, in respect to the direction of the travel of said shuttle.
  • said means includes a drawing-in means which is disposed movably on the sley of the loom and which is connected with a linkage travelling on a guide cam, the guide cam being secured to the loom and being so shaped that, during the forward movement phase of the sley, movement is imparted to the drawing-in means for grasping the yarn which causes a loop of the yarn to be passed through the shuttle.
  • said guide has a second horizontal extending recess which is shorter than the first recess, said second recess having one horizontal boundary which is adjacent to the first recess and is separated therefrom by a horizontally extending raised portion of the guide.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US597284A 1965-12-23 1966-11-28 Arrangement for transferring yarn on a weaving loom Expired - Lifetime US3430666A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1774165A CH440162A (de) 1965-12-23 1965-12-23 Fadenübergabeanordnung an einer Webmaschine

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US3430666A true US3430666A (en) 1969-03-04

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US (1) US3430666A (en))
BE (1) BE691607A (en))
CH (1) CH440162A (en))
DE (1) DE1535532A1 (en))
ES (1) ES334862A1 (en))
GB (1) GB1162670A (en))

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100944A (en) * 1975-09-19 1978-07-18 Omita S.P.A. Method and apparatus for transferring the weft
CN103966744A (zh) * 2014-05-26 2014-08-06 高密市金鹰纺织有限公司 一种梭子穿线装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US223951A (en) * 1880-01-27 Hot-water reservoir
US522583A (en) * 1894-07-10 Edouard a
US948945A (en) * 1907-07-08 1910-02-08 Edward Smith Shuttleless loom for weaving.
FR519825A (fr) * 1916-10-25 1921-06-16 Edouard Thoma Appareil enfileur de navette pour métier à tisser
US1632912A (en) * 1925-03-23 1927-06-21 Mullor Alvaro Weft-feeding device for weaving looms
FR1218888A (fr) * 1959-03-14 1960-05-13 Un métier à tisser à navette unique pour marche continue
US3163184A (en) * 1961-02-10 1964-12-29 Cherpin Jean Victor Gripper shuttle
CH386941A (de) * 1960-09-08 1965-01-15 Saurer Ag Adolph Vorrichtung zur Herstellung von Geweben
US3174514A (en) * 1961-06-23 1965-03-23 C A Delius & Sohne Shuttles
US3213892A (en) * 1962-10-17 1965-10-26 Zangs Ag Maschf Weaving method and gripper shuttle weaving machine for carrying out said method

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US223951A (en) * 1880-01-27 Hot-water reservoir
US522583A (en) * 1894-07-10 Edouard a
US948945A (en) * 1907-07-08 1910-02-08 Edward Smith Shuttleless loom for weaving.
FR519825A (fr) * 1916-10-25 1921-06-16 Edouard Thoma Appareil enfileur de navette pour métier à tisser
US1632912A (en) * 1925-03-23 1927-06-21 Mullor Alvaro Weft-feeding device for weaving looms
FR1218888A (fr) * 1959-03-14 1960-05-13 Un métier à tisser à navette unique pour marche continue
CH386941A (de) * 1960-09-08 1965-01-15 Saurer Ag Adolph Vorrichtung zur Herstellung von Geweben
US3163184A (en) * 1961-02-10 1964-12-29 Cherpin Jean Victor Gripper shuttle
US3174514A (en) * 1961-06-23 1965-03-23 C A Delius & Sohne Shuttles
US3213892A (en) * 1962-10-17 1965-10-26 Zangs Ag Maschf Weaving method and gripper shuttle weaving machine for carrying out said method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100944A (en) * 1975-09-19 1978-07-18 Omita S.P.A. Method and apparatus for transferring the weft
CN103966744A (zh) * 2014-05-26 2014-08-06 高密市金鹰纺织有限公司 一种梭子穿线装置
CN103966744B (zh) * 2014-05-26 2015-11-25 高密市金鹰纺织有限公司 一种梭子穿线装置

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Publication number Publication date
CH440162A (de) 1967-07-15
DE1535532A1 (de) 1970-11-05
BE691607A (en)) 1967-05-29
GB1162670A (en) 1969-08-27
ES334862A1 (es) 1967-11-01

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