Patent GB-834566-A (GB)
Title: Improvements in apparatus for twisting strands together
IPC: D02G3/28
Filed: 1956-05-30
Abstract: 834,566. Plying yams. DEERING MILLIKEN RESEARCH CORPORATION. May 30, 1956 [June 1, 1955; June 20, 1955], No. 16750/56. Class 120(2) Apparatus for plying yarns comprises a rotatable spindle, a yarn package support non-rotatably carried by the spindle, a cup-shaped yarn guide secured to the spindle, the spindle having a transverse opening and an axial passageway extending inwards from one end of the spindle and communicating with the opening, a yarn storage surface formed on the spindle and communcating with the opening, yarn guide means supported beyond the package, means for advancing a first strand of yarn from an external source through the passageway and opening to the guide means and for advancing a second strand from the package to the guide means, means for rotating the spindle to cause the first strand to balloon about the package, and a ring rotatable with the guide and engaging the ballooning strand for confining the balloon diameter. In the arrangement shown a first yarn X is taken from a package 180 through a tensioning means 182 and into an axial passage in the twisting spindle 10. It passes out of the spindle via a radial opening on to a storage surface 38 and balloons around the outside of the spindle to the pulley 156 of a yarn tensioning and flow equalizing device 90 at the top of the spindle. A second yarn Y is taken from a package 74 mounted on a stationary support and passes through the device 90 and around the pulley 158. The two yarns are united at P, passed around the feed rolls 186 and 188 and taken up on the bobbin 190. The spindle consists of a rotary shaft 12 to which is attached the storage surface 38 and a cup-type guide 32, and a stationary yarn package support member 62 which is mounted on the shaft 12 in resiliently mounted bearings the package being held on the member 62 by a spring pressed detent 78. The package support is held against rotation by a weight, and a damping means 87, consisting of a tube containing mercury and a baffle plate, is provided to damp out any oscillations which may occur. A balloon restricting ring 36 is attached at spaced circumferential points to the top of the flyer 32. The internal package is completely enclosed in a casing which is in halves, the upper section 82 being fastened to the lower section 80 by clips 86. On the upper section 82 is mounted the yarn tensioning and flow equalizing device 90. This comprises (see Fig. 4) a base member 82 having flanges 94 and 96 between which are arranged pairs of tensioning pads 102, the upper pad of each pair being pressed against the lower pad by spring loaded pins 112. The pressure exerted is adjustable by means of a nut 16 which screws on to the upper flange 96 A rotary member 150 is mounted in the base member 92. The member 150 carries capstans 156 and 158 which are integral with bevel gears 164 and 166 which in turn mesh with a common bevel idler gear 168. The external yarn X passes through a pigtail guide 178 carried by the device 90 (Fig. 1) and thence around capstan 156. The internal yarn Y passes through the axial guide 124 is looped out around suitably spaced pins and between tensioning pads 102 up through the axial passage in the tubular shaft 148, out of the opening 174 and thence around the capstan 158. On rotation of the spindle the two yarns are twisted together at P. Equal flow of the two yarns is ensured by the capstans 156 and 158 and the tension in each yarn can be adjusted to give a proper twisting of the two yarns.