Patent GB-1253081-A (GB)
IPC: D02H3/00
Filed: 1968-10-11
Abstract: 1,253,081. Skein winders. KONINKLIJKE NEDERLANDSE TEXTIEL-UNIE N.V. 11 Oct., 1968 [11 Oct., 1967], No. 48290/68. Headings D1J and D1M. In an apparatus for preparing warps by first winding skeins on to a rotatable drum, the drum has its surface divided axially into sections so that when sufficient turns have been wound up in one section, the yarn or yarns being wound can be moved stepwise to the next section, and so on, characterised in that in each section there is at least one separator fitted on the periphery of the winding device by means of which one or more turns can be separated radially of the drum from the preceding turn or turns in said section. As shown in Fig. 5 each section of the drum may comprise four separators A, B, C, D. The action of these separators is such that for each section the first turn of a collection of threads commences on the surface of the drum between collectors A and B; the odd threads of the first turn are received by separator C; the even threads of the first turn are received by separator D; the last turn is received by separator A; and the remaining turns intermediate the first and last turns are received by separator B. A plurality of threads, for example 50, are supplied via a pretreatment installation 5, Fig. 1, and guide means 6 to a drum 1. The guide means 6 comprises two reeds 7, 8, Fig. 5, displaceable along a guide parallel to the axis of the drum 1. One reed carries the odd threads and the other reed carries the even threads. The drum 1 is divided into a number of axially spaced sections and each section has four circumferentially spaced yarn separators A, B, C, D. In one embodiment each of the yarn separators, one of which is shown at 17 in Fig. 4, comprises a U-shaped fork that can be rotated about an axis 18 such that (1) the plane of the fork 17 is normal to the winding axis of the drum 1 or (2) the plane of the fork 17 is parallel to the winding axis of the drum 1. All the yarn separators A can be swung simultaneously to setting (2) when a common bar 26 of the separators A passes a fixed cam (30) Fig. 2 (not shown). The coupling between the bar 26 and the separators A (see fork 17 in Fig. 4) is such that when the bar 26 moves back to its initial setting, such movement does not cause the separators A to move back to setting (1). The separators A are moved back to setting (1) by spring means 28, Fig. 4, unless turns of thread have been wound into the forks 17 of the separators A in which case the tension in the threads is sufficient to prevent the  springs 28 from rotating the forks 17 back to setting (1). In a similar manner the yarn separators C are coupled to a further common bar 26; and the yarn separators D are coupled to a further common bar 26. The yarn separators B are coupled to a common bar 26 in a different manner as is described below. At the start of a winding operation the plurality of yarn threads are secured to the drum 1 at a location between the yarn separators A and B of a first winding station, the threads being arranged in their correct order next to one another alternately in reeds 7 and 8 of the thread guide 6. The drum 1 is then rotated and the yarn separators B remain in a setting in which they do not catch any threads. When the yarn separator C, of the first winding station, approaches the winding-on point the reed 8 moves radially outwardly to raise the threads from reed 8 above those from reed 7 and a cam (30) rocks the separators C about their axes 18 so that the separator C of the first winding station swings to a setting below the threads from reed 8 and separates them from the threads from reed 7. When the yarn separator D of the first winding station approaches the winding-on point, the reed 7 moves radially outwardly and the reed 8 moves radially inwardly. A cam (30) then rocks the separators D about their axes 18 so that the separator D of the first winding station swings to a setting below the threads from reed 7 and separates them from the threads from reed 8. When the separators C and D have moved past the cam (30) all the separators C and D, apart from the ones that now have threads in them, return to their original setting (1), in which the plane of each fork is normal to the winding axis of the drum 1. Cam (30) is now returned to its non-operative position and the threads are wound up for several, for example four, turns on the drum and on the separator B that is swung such that it collects all but the first and last turns of a section. When the separators A approach cam 30 during the fifth revolution the cam (30) is again actuated and this time it causes the separators A to move to setting (2) such that the first separator A passes under all the threads of the fifth turn to separate them from the previous ones. The yarn guide 6 is now displaced to the next station of the drum. After this movement of the yarn guide 6, separators B pass the winding place and cam (30). The action of these separators in conjunction with bar 26 differs from that of the other separators inasmuch as they stand transversely to the direction of winding in their stationary position and are turned parallel to the direction of winding by the action of cam (30). The first turn is therefore placed on the drum between the separators at B. Next, a thread crossing is formed at C and D in the manner already described, cam (30) is returned to its non-operating position and the threads are wound on a number of times. At B these turns come on to the separator which in its stationary position lies transversely to the direction of winding so that they are kept separate from the first turn. In this way all the sections in which the same colour combination is desired are wound, after which the intermediate sections or a part of these sections are wound with another colour combination. When drum 1 is fully wound it is stopped, all the threads located over separators A are cut through, fixed to warp beam 45 and simultaneously wound on to this, warp beam 45 being driven by rotating roll 46, during which drum 1 runs back freely. At the end of this re-winding the threads which, owing to the thread crosses, lie in the desired order next to one another, are kept in this order and fixed to warp beam 45, so that they can also be put in this order in the loom. Fig. 7 (not shown) illustrates a variant of the separators.