US3640314A - Shed-forming apparatus on a loom - Google Patents

Shed-forming apparatus on a loom Download PDF

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Publication number
US3640314A
US3640314A US875034A US3640314DA US3640314A US 3640314 A US3640314 A US 3640314A US 875034 A US875034 A US 875034A US 3640314D A US3640314D A US 3640314DA US 3640314 A US3640314 A US 3640314A
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heddles
movement
shed
groups
imparting
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US875034A
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English (en)
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Edgar H Strauss
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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
    • 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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/26—Travelling-wave-shed looms
    • D03D47/262—Shedding, weft insertion or beat-up mechanisms
    • D03D47/267—Shedding mechanisms

Definitions

  • ABSTRACT A shed-forming apparatus on a wave-type loom wherein a plurality of separate sheds move one after the other simultaneously across the width of the loom a shuttle carrying a weft thread moving in each of the separate sheds and the warp threads forming the sheds are actuated by heddles, the apparatus comprising a plurality of heddles divided into groups which execute phase-displaced movements, the periodicity of these movements being repeated at intervals corresponding to the shuttle-pitchs; drive means for causing selected groups of heddles to execute these movements; and a movementimparting element connected to those groups of heddles driven by said drive means and to other heddles not driven by said drive means.
  • the heddles and the movement-imparting elements linked therewith are disposed in one plane, are movable therein, and are arranged so that actuation of the selected group of heddles by the drive means also causes actuation of the other groups of heddles.
  • This invention relates to shed-forming equipment or apparatus on a wave-type loom wherein separate sheds move one after another in an undulatory movement across the width of the loom during operation thereof and the warp threads fonning the sheds are actuated by heddles, said apparatus comprising a plurality of heddles divided into groups which execute phase-displaced movements in accordance with the order in which the groups are arranged, the periodicity of these movements being repeated at intervals corresponding to the shuttle-pitchs.
  • a shuttle moves in each of the sheds that are moved in an undulatory manner, so that when such looms are in operation, a plurality of shuttles continuously move one after the other over the width of the machine.
  • Each of the shuttles inserts a weft thread into a shed during its movement across the loom. After a shuttle has passed through a given point in its path across the loom and prior to the arrival of the next shuttle at this point, the weft thread is beaten up and the shed is changed.
  • the heddles used for forming the changing sheds can, in fact, be moved in such a way that they form a continuously moving wave curve. Such a mode of operation is, however, complicated, so that it might be uneconomical in terms of the advantages attainable.
  • the heddles are advantageously divided into groups, and the movements of the heddles are differently phased, so that the difference in phase between adjacent groups is such that an undulatory shed-forming movement results.
  • the heddles are divided into, for example, four groups over a distance corresponding to a wavelength of the undulatory movement of the reeds (i.e., the shuttle-pitch) or the distance between the forward ends of two successive shuttles (which may also be called shuttle-pitch”) then in the case of a two-thread repeat (basket or plane weave) the first, ffth, ninth group and so on are secured to the same frame for forming one-half of the shed formation.
  • four frames are necessary for a basket weave in order to produce one-half of the shed formation.
  • the entire shed formation in the case of a basket weave therefore requires eight frames. This number is thus four times the number of threads in the draw-in repeat.
  • the present invention eliminates the above disadvantages.
  • this invention contemplates a shed-forming apparatus on a wave-type loom wherein separate sheds move one after the other in an undulatory movement across the width of the loom during operation thereof, a plurality of shuttles each carrying a weft thread continuously move one after the other along a path over the width of the loom, a shuttle moving in each of the separate sheds, and the warp threads fonning the sheds are actuated by heddles, divided into groups, these groups executing phase-displaced movements in accordance with the order in which the groups are arranged and the periodicity of these movements being repeated at intervals across the loom corresponding to the shuttle-pitchs, said apparatus being characterized in that when the loom is in operation, of the heddles which have differently phased movements, those of a first and at least of a second phase are each motionally connected to a movement-imparting element or member and these heddles and the movement-imparting elements linked therewith are disposed in one plane and are movable therein and these
  • FIG. 1 is a perspective view of a wave-type loom in which the position and arrangement of the shed-forming apparatus of this invention is shown;
  • FIG. 2 shows a cross section of shed-forming apparatus at a right angle to the path of movement of the shuttles
  • FIG. 3 is an elevational view of the novel heddles of this invention used in conjunction with the apparatus shown in F IG.
  • FIG. 4 is a schematic plan view of the heddle arrangement shown in FIG. 2;
  • FIG. 5 shows a further embodiment of the apparatus for producing another weave and which is similar to the embodiment shown in FIGS. 2 and 4;
  • FIG. 6 shows yet another embodiment of a heddle arrangement in the shed-forming apparatus of this invention
  • FIG. 7 is a perspective illustration showing details of the heddle arrangement shown in FIG. 6.
  • FIG. 8 is a schematic illustration of the movement of the heddles in the embodiment shown in FIG. 5.
  • FIG. 1 The perspective view of a multiphase weaving machine or wave-type loom in FIG. 1 shows the position of the shed-forming apparatus or equipment on this loom.
  • the warp threads 12 run from a warp beam 11 via the guide rolls l3 and 14 and a warp thread monitor 15 around a roll 16, which can take the form of a shed-equalizing roll.
  • the warp threads 12 are subject to a shed formation by a shedding arrangement comprising substantially horizontal heddles 30, an open shed 17 being present at the position of the forward portion of each inserting member or shuttle l8, and a shed-change taking place between each two adjacent shuttles 18.
  • the relative positions of these sheds are indicated in the drawing by appropriate hatching.
  • a plurality of weft-inserting members in the form of shuttles 18 are provided, and these move simultaneously one after the other over the width of the loom.
  • the shuttles 18 are moved forward by the reeds 19 which act as drive means or members. These reeds also serve to beat up the inserted weft threads at the beat-up or fell 20 of the fabric.
  • the shuttles 18 are guided in each shed 17 by the warp threads 12.
  • the reeds 19 are incorporated in the support and drive arrangement 28 which is firmly secured to the frame 29 of the loom.
  • the two worm shafts 21 and 22, extending through the arrangement 28, impart movement to the reeds 19.
  • each reed 19 is swung about a pivot (indicated by reference numeral 53 in FIG. 2) in such a way that each reed 19 is always slightly ahead of the reed preceding it, in its cycle of movement. In this way, there is produced in the reeds 19 as a whole an undulatory movement proceeding from right to left in FIG. 1, the shuttles 18 being carried along the reeds by this movement.
  • the sheds 17 also move from right to left at the same speed.
  • the woven material 23 is wound on to the cloth beam 26 by the pull-in roller 24 and the pressure roller 25.
  • FIG. 2 shows details of the support and drive arrangement 28 and is a view taken perpendicular to the path of the shuttles 18 and to the worm shafts 21 and 22.
  • the portions of the reeds 19 shown in the drawing each indicate one of the end positions in their swinging movements.
  • Between the warp threads forming the shed 17 are the shuttles 18, movable by means of the reeds 19.
  • Each of the reeds is disposed between two broadfaced, flat guide elements or plates 31, one of which can be seen in FIG. 2 in a side view. A very considerable number of guide elements are massed together in the direction perpendicular to the plane of the drawing. In this arrangement, the guide elements 31 alternate with the reeds 19.
  • the guide elements 31 are thin stamped sheets of metal or plastic material arranged parallel with each other, which hold the reeds at the required distance apart from each other.
  • rods 32 which pass transversely through the guide elements 31, the elements are held together to form a unit comprising a large number of such elements; the distance between adjacent guide elements 31 being determined by spacer pieces fitted between them and held by the rods 32.
  • FIG. 2 The embodiment shown in FIG. 2 is used for the weaving of a twothread repeat (basket weave).
  • the heddles 33 and 34 for forming the sheds, are likewise fitted between the guide elements 31 and can move between them.
  • FIG. 3 shows four different kinds or groups of elements (designated by reference numerals I-IV respectively) which can be used as heddles 33 or 34. These elements are designed as flat heddles.
  • Each heddle 33, 34 is located between two guide elements 31, the side faces of the heddles 33 and 34 extending parallel with the side faces of the guide elements 31. In this way the heddles 33 and 34, which move in their longitudinal direction for forming each of the sheds, are prevented from bending laterally.
  • the heddles 33 contain an eye 35 and the heddles 34 an eye 36, through each of which a warp thread can be drawn.
  • Some of the heddles 33 and 34 are connected to the double levers 39 and 40, respectively, by way of drive bars 37 and 38 respectively (FIG. 2), on the ends opposite the eyes 35 and 36.
  • These levers 39, 40 can be swung about the pivot 45 and are continuously linked to the eccentric wheels 43 and 44, respectively, by their ends secured to the rollers 41 and 42, respectively.
  • the eccentric wheels 43, 44 are rotated by means of the shaft 46.
  • the drive bars 37 and 38 can be driven by a heald machine instead of through the eccentrics 43 and 44.
  • FIG. 4 is a schematic plan view of a portion of the arrangement of heddles in FIG. 1.
  • the reeds 19 and the worm shafts 21 and 22 producing their swinging movement are not shown.
  • the distances between the guide plates or elements 31 and the heddles 33 and 34 as well as the thickness of the heddles are shown exaggerated, i.e., enlarged in size.
  • the heddles 33 and 34 are divided into groups I, II, III and IV. Each group can, for example, comprise ten to thirty heddles 33 and 34. Thus, while only two heddles 33 and 34 per group and per shed-half are shown in FIG.
  • FIG. 3 shows the heddles 33 and 34 used in the embodiment of the loom construction illustrated in FIGS. 2 and 4.
  • the top type of heddle construction is used for group II
  • the type of heddle construction second from the bottom is used for the heddles of group III
  • the bottom type of heddle construction is used for group IV.
  • Each of the heddles 33 and 34 contains an orifice 49 and three slots 50, which are distributed over the length of each heddle.
  • the orifice 49 as shown in FIG.
  • rodlike movementimparting elements 52 Inserted through the orifices 49 of the heddles 33 and 34, fitted between the guide elements 31, are rodlike movementimparting elements 52 which are disposed at right angles to the guide elements 31 and are preferably of rectangular cross section.
  • the extent of these orifices 49 is such that the rods 52 which pass through them bear against the boundaries of the orifices 49 in the longitudinal direction of the heddles 33 and 34.
  • the heddles 33 of group I and the heddles 34 of this group are penetrated by the two foremost movement-imparting elements 52 (i.e., left in FIG. 2, top in FIG. 3). The position of these heddles in their longitudinal direction is thus determined by the position of the movement-imparting elements 52 which pass through them.
  • the foremost rod 52 thereforepenetrates the orifices 49 of the heddles 34 in all of the groups I (shown in FIG. 4). It also passes the foremost slot in the heddles 34 of all the other groups II, III and IV.
  • the orifices 49 in all the heddles 33 of groups I are likewise penetrated by the second movement-imparting element 52 from the front, which furthermore passes through the foremost slot 50 in the heddles 33 of groups II, III and IV. Similar conditions also apply in the case of the movement-imparting elements or rods 52 and the heddles 33 and 34 of the other groups II, III and IV.
  • eight movement-imparting elements 52 are used, each of which precisely detennines the position of the heddles 33 or 34 of one of the groups I, II, III or IV in their longitudinal direction.
  • the rods 52 also pass through corresponding slots 51 in the guide elements 31.
  • Rods 52 are disposed to lie in the transverse direction of these slots 51 precisely against their boundaries and are thus held by them, but are slidable in the longitudinal direction thereof. Since the width of the slots 50 in the heddles 33 and 34 is such that the rods 52 likewise bear against their broad sides, a guiding of the heddles 33 and 34 is thus obtained, whereby they are also held in their horizontal position of FIG. 2 and in their transverse direction respectively. As mentioned earlier, the heddles 33 and 34 are prevented from bending by the guide elements 31.
  • the worm shafts 21 and 22 shown in FIGS. 1 and 2 cause the reeds 19 to swing about their pivotal axes 53 in such a manner that their forward ends as a whole form an undulating line of the shape seen in FIG. 1, this undulating line moving to the left.
  • the sheds 17 (FIG. I) associated with each shuttle 18, must move at the same speed as that at which the shuttles 18 move to the left.
  • the sheds are not formed in such manner that the warp threads or the heddles 33 and 34 form a continuous curve as is the case with the reeds 19; instead the travel of the sheds is caused by the heddles 33 and 34 moving in groups.
  • FIG. 4 the movement of the shuttles I8 is from left to right. It will be appreciated that in FIGS. 1 and 4 right and left are interchanged, since the view in FIG. 4 is a plan view in which the drive arrangements provided for the groups I, II, III and IV, are generally indicated in FIG. 4 by the reference numeral 54.
  • the heddles 33 and 34 of groups I execute the shed-opening movement. Some warp threads controlled by these groups or heddles are therefore looped round the rearmost portions of the shuttles 18.
  • the heddles 33 and 34 of group II are in the position in which the sheds are closed. The warp threads actuated by these heddles therefore lie against the walls of the shuttles.
  • the shuttles are thus laterally held by the warp threads controlled by the heddles of groups I and II.
  • the movement of the heddles of group II are shifted through 90, i.e., their associated discs 43 and 44 are displaced 90 on the shaft 46 and lag behind the movement of group I.
  • the heddles of group III are in a closing phase of operations and lag 180 behind group I.
  • Their phase displacement relatively to group II is 90.
  • the heddles of group IV are accordingly in the open shed position. They lag 270 behind the heddies of group I.
  • FIG. 4 shows that end of the shaft arrangement of the loom that is at the right-hand end of FIG. 1.
  • the heddle groups I, II, III and IV follow each other in succession to the other end (not shown in FIG. 4) of the shedforming apparatus in the sequence illustrated.
  • the last groups I, II, III and IV (not shown in FIG. 4) present on the loom at the other end also have drives which are identical to the drive arrangements 54 comprising the elements 37 to 48.
  • the eccentric discs 43 and 44 associated with the heddles of group I, as well as the eccentric discs of the heddles in the remaining groups II, III and IV on both sides of the loom are caused to rotate.
  • the movements of neighboring or adjacent groups of heddles, as already mentioned, are displaced from each other through 90".
  • the two eccentric discs 43 and 44 of group I and thus the movements of the heddles 33 and 34 of this group also continuously have a phase-difference relatively to each other of 180.
  • all the heddles 33 and all the heddles 34 of groups I execute a movement of op posite phase.
  • the heddles 33 and 34 of the groups II, III and IV have slots 50 at the positions corresponding to the orifices 49 in the heddles 33 and 34 of groups I.
  • the slots 50 are of such length that the rods 52 of groups I are enables to move freely in all conditions, so that the heddles of groups II, III and IV are not affected by the movement of the rods 52 of group I.
  • a rod 52 is likewise fitted through each of the orifices 49 in the heddles 33 and 34 of groups II. These rods, as shown, are located precisely one above the other in FIG. 4.
  • the heddles of the outermost groups II on both sides of the loom are likewise each driven by a drive arrangement 54. The heddles so driven move the rods 52, that pass through the orifices 49 of all the heddles 33 and 34 of groups II, so that all the other heddles 33 and 34 of groups II are driven by these two rods 52.
  • the heddles 33 and 34 of groups I, III and IV have slots 50, as shown in Figure 3. These are again of such length that the two rods of groups II can move freely in all conditions, so that the heddles of groups I, III and IV are not affected by the movements of the rods or the guide elements 52 of group II.
  • the draw-in repeat is formed by two threads. Considering only the outermost four groups I, II, III and IV, i.e., the heddles present in the individual shuttlepitch 6]. it will be seen that, in the case of each of the groups I, II, III and IV, the heddles 33 move like threads of the draw-in repeats, e.g., the odd-numbered threads of the succession. These build one shed-half. In the case of each of the groups I, II, III and IV, the heddles 34 likewise move like threads of the draw-in repeats, which in this instance are the even-numbered threads. These form the other half of the shed.
  • the heddles 33 of the odd-numbered warp threads of groups I, II III and IV are each coupled to a movement-imparting member 52 (33) and these heddles 33 and the movement-imparting members 52 (33) are disposed in the same plane.
  • the heddles 34, which move the even-numbered warp threads of each of the groups I, II, III and IV and are each linked to a movement-imparting member 52 (34), are also disposed in the same plane.
  • the heddles may be twice as long and each heddle may contain one orifice and seven slots. It will be seen that with such an arrangement all the heddles and therefore all the movement-imparting members can be fitted in the same plane. This results in the advantage that all the heddles can be located as closely as possible to the shuttles 18. An arrangement of this kind can be considered when the required density of the warp threads is not too great.
  • both the heddles 33 and the heddles 34 may be distributed over two planes.
  • the heddles 33 for the first, fifth threads and so on are located on one plane and the heddles 33 for the third, seventh threads and so on in another plane.
  • the heddles are distributed over four planes, and four heddles can be provided between each two guide elements 31.
  • twice as many heddles can be fitted as is the case in the embodiment illustrated in Figures 2 to 4.
  • FIG. 5 is a schematic view, seen from the front, of a further embodiment of the apparatus similar to that shown in FIGS. 2, 3 and 4. This construction is used for producing complicated weaves.
  • the figure shows three shuttles, 18a, 18b and 180, which are moved by the reeds 19 from right to left when the rising forward ends of the reeds 19 press against the inclined rear edges of the shuttles 18.
  • rows of heddles 55, 56, 57, 58 and 59 of the type shown in Figure 3 are provided. Only the front ends of the heddles are shown and, for the sake of clarity, only a few guide elements 31 in the group I are shown on the right-hand side.
  • All the rows of heddles 55 to 59 are again divided into groups I, II, III and IV, like groups of heddles always being in the same operating phase. Also the heddles of each groups have the same construction.
  • the assemblies comprising four groups I, II, III and IV each, arranged side by side, are again designated as being within shuttle-pitches 61, 62 and 63.
  • the horizontal extent of each of the shuttle-pitches 61, 62 and 63 corresponds in a certain sense to half the wavelength of the wavelike movement of the heddles 55 to 59, or to a wavelength of the reeds 19.
  • the apparatus is arranged to perform a five-thread draw-in repeat.
  • the heddles 55 to 59 of each column are each connected with such warp threads as form a drawin repeat.
  • All the heddles 55 of groups I, II, In and IV, e.g., over the distance of a shuttle-pitch 61, are connected to the same threads of the draw-in repeats and all the shuttles 55, e.g., of group I, are connected to the same movement-imparting member.
  • the drive required for the heddles 55 to 59 can, for example, be carried out in such manner that there are provided for one of the shuttle-pitches 61, 62 or 63 drive assemblies which are similar to the drive arrangements 54.
  • Each of the rows of shuttles 55 to 59 of group I may be driven by an eccentric.
  • a dobby can, however, be provided for this group I.
  • each of these eccentrics actuates a movement-imparting member (of the type shown in Figure 4) of which there are thus twenty in all.
  • a similar drive arrangement is, of course, necessary on the other side of the machine.
  • still more drive arrangements can be provided along the movement-imparting members 52.
  • each of the rows of heddles 55 to 59 of group I is connected to a movement-imparting member, i.e., the same threads of the draw-in repeats of group I are each connected via the heddles to a movement-imparting member.
  • the four movement-imparting members of row 55 i.e., of the first thread of the repeats in groups I, II, III and IV are located in one plane
  • the four movement-imparting members of row 56 i.e., of the second thread of the repeat in groups I, II, III and IV are located in one plane, and so on.
  • the heddles of the threads of each repeat are shown as disposed vertically one below the other and between the same guide elements 31.
  • the heddles can, however, also be slightly ofi'set laterally of each other. This displacement can be to an extent such that only one heddle is located between each two neighboring guide elements.
  • the sheds formed by the heddles of groups I are open, the sheds formed by the heddles of groups II are opening (the weft threads embracing the rear portion of the shuttles 18), the sheds formed by the heddles of groups III are closed and those formed by the heddles of groups IV are closing.
  • the movements of the heddles of the four groups I, II, III and IV are phase-displaced by between neighboring groups. In this arrangement, the heddles are therefore, likewise, provided with an opening 49 and three slots 50 as shown in FIG. 3.
  • FIG. 6 and 7 show an arrangement in which heddles 64 secured to frames 67 (I to IV) are provided with thread eyelets 66.
  • the frames 67 act as movement-imparting members for the heddles 64 and are themselves moved in guides 65.
  • the frames are all mounted in the same plane.
  • Secured at the end zone of the long side of each frame is a drive element 68 by means of which each of the frames 67 can be reciprocated in its plane.
  • the gaps 69 between the individual frames 67 are of such a dimension that sufficient space is present for the movements necessary for forming the shed. Since all the frames 67 are disposed in the same plane, it is necessary for the drive elements 68 of frame 67 II to pass through frames 67 l.
  • the elements 68 for frames 67 III must likewise pass through the frames 67 I and 67 II and the elements 68 of the frame 67 IV through the frames 67 I, 67 II and 67 III.
  • the corresponding requirement also holds as regards the heddles 64.
  • the heddles 64 of frame 67 I pass through the other three frames 67 II, 67 III and 67 IV, the heddles of frame 67 III through the frames 67 IV.
  • FIG. 7 An embodiment showing the method of fixing the heddles 64 to the frames 67 is illustrated in FIG. 7. This shows the area indicated by the arrow VII in FIG. 6.
  • the individual heddles 64 are secured to the frame 67 IV by a retaining means 70, this means bearing against the outer edge of this frame 67 IV.
  • the heddles 64 carried by the frame 67 III are secured in the same manner.
  • In the frame 67 IV there is a gap 71, in which the heddles 64' can slide unrestrictedly in their longitudinal direction. Similar gaps are provided in the other frames.
  • the illustrated four movement-imparting members of frames 67 l to 67 IV are used for forming one half of the shed.
  • a second heddle arrangement not illustrated, which is identical with that shown in Figure 6 and is positioned directly behind it.
  • the oppositely arranged and corresponding frames 67 I, 67 II, 67 III and 67 IV or each heddle arrangement respectively move in phase opposition.
  • frame 67 I has a phase-displacement of 90.
  • frame 67 III disposed in this same plane has a phase-displacement of 90 in the same direction in relation to frame 67 II, and the movement of frame 67 IV, arranged in this plane, is likewise displaced in phase by 90 in the same direction relatively to frame 67 III.
  • the number of heddles 33 and 34 per group is generally between 20 and 100 in the case of normal thicknesses of thread, i.e., the number of heddles per half-shed and per group is between 10 and 50.
  • FIG. 8 This figure illustrates schematically a section at right angles to the path of the cloth 23 in FIG. 1 at the level of the shuttles l8, and the points of intersection of the warp threads 80 to 84, the shuttles 118, seen in section, and the division into the four groups I, II, III and IV are shown.
  • the warp threads 80 to 84 are moved by the heddles arranged in rows 55 to 59. If it is assumed that the number of threads in each groups is 60, for example, then 12 heddles (and 12 warp threads) are present in each of the rows 55 to 59 per group.
  • FIG. 8 The 12 warp threads, which are always moved in phase, are illustrated in FIG. 8 by a single warp thread. This has been done in order not to make the diagrammatic illustration too complicated and difficult to understand.
  • the illustrated succession of threads 80 to 84 is therefore repeated 12 times over each of groups I to IV.
  • the illustrated threads 80 to 84 in each group represent a draw-in repeat. If FIGS. 5 and 8 are taken as corresponding, then 12 heddles 55, 12 heddles 56 and so on are present in each group.
  • the heddles of row 55 move the 12 threads 80, i.e., the first threads of the draw-in repeats, the heddles of row 56 the 12 threads 81, i.e., the second threads of the draw-in repeats, and so on.
  • group I of shuttle-pitch 63 the shuttle 18a, entering this group, finds the threads 81, 82, 83 and 84 at the rear of the shuttle path and the thread 80 at the front of the shuttle path, and an open shed position.
  • group II of the shuttle-pitch 63 the threads 80 and 84 are opening.
  • group IV of shuttle-pitch 62 the threads 80 and 81 are closing.
  • group III of shuttle-pitch 62 the threads 80 and 81 are in the closed position of the shed.
  • threads 80 and 81 are opening and in group I of the shuttle-pitch 62 the threads 80, 82, 83 and 84 are to the rear and thread 81 to the front.
  • group IV of the shuttle-pitch 61 the threads 81 and 82 are closing, and in group III of this shuttle-pitch they are moving through the closed shed position.
  • group II of shuttle-pitch 61 threads 81 and 82 are opening.
  • an open shed is present in which thread 82 are forward and in which threads 80, 81, 83 and 84 are to the rear. The movements described are indicated by arrows in FIG. 8.
  • the reference numeral 860 indicates the weft thread inserted by the shuttle 18a, and 86b the weft thread inserted by the shuttle 18b.
  • Thread 8611 is shown as a dash line and thread 86b as a dash-dot line.
  • the weft thread 86a or 86b is shown on one or other side of the center line 87 to indicate on which side of the warp threads it lies.
  • the first, third, fifth warp threads and so on are to the front and the second, fourth warp threads and so on are to the rear of center of the shed. Because of the shed-change that has taken place, the reverse conditions must be present in the case of the shuttle that follows in the shuttle 18b, and also in the case of the shuttle 18a shown in the draw ing. In the case of these shuttles, the first, third, fifth warp threads and so on are to the rear, and the second, fourth, sixth warp threads and so on to the front. In order to obtain a weave that is free from defect, each individual shuttle must always encounter the same warp pattern during its passage over the entire width of the fabric.
  • the odd-numbered threads of the pitch 62 execute the same movement as that executed by the odd-numbered threads of shuttle-pitch 6i when this particular shuttle passed through the pitch 61.
  • the movement of the movement-imparting member 52 (34) can be considered as a movement lagging behind that of the movement-imparting element 52 (33) by an amount corresponding to the interval between the passage of two successive shuttles.
  • the odd-numbered threads of the shuttle pitch 611 (heddles 33) are motionally connected via heddles 33 to the movement-imparting member 52 (33)
  • the odd-numbered threads of shuttle pitch 62 (heddles 34) must be linked to the trailing movement-imparting member 52 (34) and thus with the heddles 34.
  • the above situation means that in the case of groups of like phases which immediately follow each other e.g., groups I), the heddles for like threads of the draw-in repeats are motionally connected to the movement-imparting members which execute the same movement in immediate succession.
  • FIG. 8 only one draw-in repeat is shown in each of the groups I to IV. If 60 threads, for example, are provided per group, the draw-in repeat is actually repeated 12 times in each group.
  • the following distribution might exist in the embodiment of FIG. 8: Motionally connected to the first movementimparting member 50 are the heddles for threads 80 of group I of shuttle-pitch 61, the heddles for threads 84 of group I of shuttle-pitch 62, the heddles for threads 83 of group I of shuttle-pitch 63 and so on.
  • Motionally connected to the second n A on movement-imparting member are the heddles for threads 80 of group II of shuttle-pitch 61, the heddles for threads 84 of group II of shuttle-pitch 62, the heddles for threads 83 of group II of shuttle-pitch 63 and so on.
  • Motionally connected to a third movement-imparting member are the heddles for threads 80 of group III of shuttle-pitch 61, the heddles for threads 84 of group III of shuttle-pitch 62, the heddles for threads 83 of group III of shuttle-pitch 63 and so on.
  • a corresponding situation applies in the case of a fourth movementimparting member and group IV.
  • the four movement-imparting members mentioned are arranged in the uppermost plane of the heddles 55 in FIG. 5.
  • a second plane there is a second arrangement of four movement-imparting members.
  • the first of these is motionally connected to the heddles for threads 81 of group I of shuttlepitch 61, the heddles for threads 80 of group I of shuttle-pitch 62, the heddles of threads 84 of group I of shuttle-pitch 63 and so on.
  • the second movement-imparting member in the second plane is motionally connected to the heddles for threads 81 of group II of pitch 61, the heddles for threads 80 of group II of shuttle-pitch 62, the heddles for threads 84 of group II of pitch 63, and so on.
  • the heddles for the threads of groups III and IV are also motionally connected in accordance with the manner described.
  • the movement-imparting members in the second plane are located in the plane of heddles 56 in FIG. 5. Accordingly, four movement-imparting members are also provided in each of the planes of heddles 57, 58 and 59 in FIG. 5.
  • the heddles 80 for the threads of group I of pitch 62 can be motionally connected to the movement-imparting member which actuates the heddles 81 of group I of pitch 61, the movement of this movement-imparting member thus lagging to an extent equal to the interval between immediately subsequent shuttle travels.
  • the threads 80 of group I of the pitch 63, the threads 81 of group I of the pitch 62 and the threads 82 of group I of the pitch 61 are moved by a movement-imparting member disposed in the plane of the heddles 57.
  • a shed-forming apparatus on a wave-type loom wherein separate sheds move one after the other across the width of the loom, a plurality of shuttles, each carrying a weft thread, continuously move one after the other along a path through the loom, a shuttle moving in each of the separate sheds, and the warp threads forming the sheds are actuated by heddles; said apparatus comprising a plurality of heddles for forming the warp threads into sheds, said heddles being divided into groups that execute phase-displaced movements in accordance with the order in which the groups are arranged across the loom, the periodicity of these movements being repeated at intervals across the loom corresponding to the shuttle-pitches; drive means for causing selected groups of heddles to execute said movements; a movement-imparting element coupled with each of the heddles of a first phase and a movement-imparting element coupled with each of the heddles of a second phase, the heddles and the movement-imparting elements
  • each of said groups having heddles that form half of the shed formation and that are each motionally connected to a movement-imparting element, the motionally connected heddles and the movement-imparting elements being arranged in a first plane, and those heddles in each of the groups that form the other half of the shed forma tion each being motionally connected to a movement-imparting element; the heddles forming the other half of the shed formation and the movement-imparting elements associated therewith being arranged in a second plane which is different from the first plane.
  • the shed-forming apparatus of claim 8 in which the guide means for the heddles comprise fiat, broad-faced guide elements, said heddles being arranged parallel with the sides of the guide elements.
  • the shed-forming apparatus of claim 8 in which the heddles lying in said plane are arranged alongside each other and parallel with each other in a row, and said guide means comprise a plurality of said movement-imparting elements in the form of rods disposed parallel with said plane.
  • the shed-forming apparatus of claim 11 in which the heddles are each provided with said openings in the form of slots extending in the longitudinal direction thereof, and said rods pass through said slots, the lengths of the slots permitting unrestricted relative movement between the rods and the heddles in the longitudinal direction of the heddles, and the widths of the slots being determined by boundaries within which the rods lie.
  • the shed-forming apparatus of claim 1 in which the movement-imparting elements comprise rods that are disposed transversely of the heddles and that pass through orifices in the heddles motionally connected thereto, the rods bearing flat against the boundaries of the orifices in the direction of movement of the heddles.
  • each of the heddles is of elongate shape, contains an orifice through which can pass the movement-imparting element motionally connected thereto, and contains at least one opening in the form of a slot extending in the longitudinal direction of the heddle, through which can be passed a movement-imparting element for moving other heddles, this latter movement-imparting element being movable in an unrestricted manner in the longitudinal direction of the slot.
  • the shed-forming apparatus of claim 16 in which the number of slots in the heddles is one less than the number of groups into which the heddles are divided over the distance equal to a shuttle-pitch.
  • the shed-forming apparatus of claim 14 in which the movement-imparting elements can be driven via said selected groups of heddles by drive means positioned in at least two drive points disposed approximately symmetrically in relation to the centers of the movement-imparting elements.
  • said selected group of heddles include the heddles of one group which are present at the drive points and which execute like movements
  • said driving means includes a retaining member which holds all of the heddles of said one group.
  • a shed-forming apparatus on a wave-type loom wherein separate sheds move one after the other across the width of the loom, a plurality of shuttles, each carrying a weft thread, continuously move one after the other along a path through the loom, a shuttle moving in each of the separate sheds, and the warp threads into sheds, said heddles being divided into groups that execute phase displaced movements in accordance with the order in which the groups are arranged across the loom, the periodicity of these movements being repeated at intervals across the loom corresponding to the shuttle-pitches; movement-imparting elements, the heddles of one phase in each group being coupled with one of said movement-imparting elements, the heddles which have differently phased movements being coupled with different movementimparting elements, the movement-imparting elements and the heddles linked therewith being disposed in a single plane and bein movable therein; drive means for efiecting movement of e movement-imparting elements, and a plurality of opening
  • the shed-forming apparatus of claim 20 in which the movement-imparting elements comprise heddle frames, the heddle frames located in the same plane being arranged concentrically one within the other; said openings being provided in each of the heddle frames and the heddles secured to the other heddle frames being free to move in their longitudinal directions through said openings.
  • each heddle frame is connected to drive elements of said drive means, the drive element of at least one heddle frame passing through the openings in the other heddle frames, thereby enabling an independent movement of these parts.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US875034A 1968-11-13 1969-11-10 Shed-forming apparatus on a loom Expired - Lifetime US3640314A (en)

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CH1690168A CH491225A (de) 1968-11-13 1968-11-13 Fachbildeeinrichtung

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US (1) US3640314A (cs)
BE (1) BE741570A (cs)
CH (1) CH491225A (cs)
CS (1) CS151532B2 (cs)
ES (1) ES373030A1 (cs)
FR (1) FR2023179A1 (cs)
GB (1) GB1291062A (cs)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3831638A (en) * 1971-09-15 1974-08-27 A Rotenburg Shedding mechanism for looms
US3985160A (en) * 1975-05-30 1976-10-12 Barber-Colman Company Heddle for a weaving machine for making triaxial fabrics
US4050480A (en) * 1975-06-06 1977-09-27 Ruti Machinery Works Ltd. Apparatus for selective moving of lamella shaped heddles
US4053000A (en) * 1976-05-03 1977-10-11 Anatoly Grigorievich Selivanov Shedding mechanism for travelling-wave looms
US4076050A (en) * 1974-05-17 1978-02-28 Ruti Machinery Works Ltd Shed forming device on an undulated shed loom
US20060054236A1 (en) * 2003-03-03 2006-03-16 Johann Berger Method for producing a woven and a heddle particularly for use thereby
US20090139580A1 (en) * 2007-11-21 2009-06-04 Groz-Beckert Kg Apparatus for the production of leno fabric
CN106757646A (zh) * 2017-04-07 2017-05-31 吴江万工机电设备有限公司 一种大型织造系统的波型开口装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2467898A1 (fr) * 1979-10-18 1981-04-30 Valton Sa Metier a tisser a lisses commandees individuellement dans une double fonture

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258035A (en) * 1963-01-24 1966-06-28 Oerlikon Buehrle Ag Shed forming mechanism for wave weaving looms
US3263705A (en) * 1962-11-23 1966-08-02 Rudolf H Rossmann Weaving method and loom
US3342218A (en) * 1965-03-22 1967-09-19 U T L Inc Device for the formation of a travelling shed in looms

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263705A (en) * 1962-11-23 1966-08-02 Rudolf H Rossmann Weaving method and loom
US3258035A (en) * 1963-01-24 1966-06-28 Oerlikon Buehrle Ag Shed forming mechanism for wave weaving looms
US3342218A (en) * 1965-03-22 1967-09-19 U T L Inc Device for the formation of a travelling shed in looms

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3831638A (en) * 1971-09-15 1974-08-27 A Rotenburg Shedding mechanism for looms
US4076050A (en) * 1974-05-17 1978-02-28 Ruti Machinery Works Ltd Shed forming device on an undulated shed loom
US3985160A (en) * 1975-05-30 1976-10-12 Barber-Colman Company Heddle for a weaving machine for making triaxial fabrics
US4050480A (en) * 1975-06-06 1977-09-27 Ruti Machinery Works Ltd. Apparatus for selective moving of lamella shaped heddles
US4053000A (en) * 1976-05-03 1977-10-11 Anatoly Grigorievich Selivanov Shedding mechanism for travelling-wave looms
US20060054236A1 (en) * 2003-03-03 2006-03-16 Johann Berger Method for producing a woven and a heddle particularly for use thereby
US7066212B2 (en) * 2003-03-03 2006-06-27 Berger Gmbh & Holding Kg Method for producing a woven and a heddle particularly for use thereby
US20090139580A1 (en) * 2007-11-21 2009-06-04 Groz-Beckert Kg Apparatus for the production of leno fabric
US7918249B2 (en) * 2007-11-21 2011-04-05 Groz-Beckert Kg Apparatus for the production of leno fabric
CN106757646A (zh) * 2017-04-07 2017-05-31 吴江万工机电设备有限公司 一种大型织造系统的波型开口装置

Also Published As

Publication number Publication date
FR2023179A1 (cs) 1970-08-07
BE741570A (cs) 1970-04-16
GB1291062A (en) 1972-09-27
CH491225A (de) 1970-05-31
ES373030A1 (es) 1971-12-01
CS151532B2 (cs) 1973-10-19

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