Patent GB-508480-A (GB)
Title: Improvements in bobbin stripping apparatus
IPC: B65H73/00
Filed: 1937-12-30
Abstract: 508,480. Stripping waste from bobbins. STEPHENS, A. J. (Terrell Machine Co.) Dec. 30, 1937, No. 36113. [Class 120 (iii)] Apparatus for stripping waste from bobbins comprises an endless travelling surface which engages, or has parts which engage, the heads of the bobbins and move them one after another along a single path with their tips directed downwards while the yarn is unwound over such tips. As shown in Figs. 1 and 4 the bobbins 1 are inserted manually between tracks 5, 6, which are adjustably mounted on the frame members 11, 12, and move by gravity between a pair of endless belts 40, 41 running above the tracks with their adjacent courses engaging the heads of the bobbins and backed by angle irons 50, 60, the iron 50 being fixed and the iron 60 being in sectioris slidable in the track 6 and forced against the course of the belt 41 by springs 76. The unwinding of the waste from the bobbins as they are moved by the belts may be effected by the weight of the yarn or a number of air jets 105 may be provided which direct streams of compressed air at different levels against the waste. The yarn ends thus carried downwards are engaged by a cylinder 110 clad with brush strips 111 so that the ends become wound up on the cylinder and from which they are subsequently removed; a metal strip 125 carried by bridges 128 and having headed studs 140 slidable in bridges 145 engages the heads of the bobbins and keeps them vertical and the bobbins may be rotated in the unwinding direction by causing one of the forwarding belts to travel faster than the other or the bobbins may be forwarded by a single belt which yieldingly presses the bobbins against a fixed vertical surface. A cutter 210 having relatively reciprocating blades may be provided at the feed end of the apparatus to cut off very long yarn ends which might otherwise become entangled, the ends being guided by wires 220, 225. In a modification the bobbins pass along a channel, the sides of which are perforated and form part of parallel chambers supplied with air from fans mounted at the sides of the apparatus. In another arrangement air currents are dispensed with and the bobbins are engaged by the contacting courses of a pair of inclined endless belts which free the yarn from the bobbins, which then pass between a pair of brush clad cylinders having tapered end portions directed towards the belts. The bobbins may be fed positively through the apparatus by a link-belt 84, Fig. 8, carrying headed studs each swivelled in a small sprocket 88 carrying a pin provided with springs for engaging the bore in the bobbin head. As the belt carries the bobbins around the sprocket 85 the pendent ends pass between the contacting courses of the inclined belts 34 and the sprockets 88 engage a short run of chain 92 so that the bobbins are rotated in the unwinding direction ; after the bobbins have passed from the brush clad cylinders 54 a fixed cam 93 pulls the bobbins off the pins on the sprockets at a dip 94 in the tracks 5 ; this positive bobbin feed is particularly useful for paper bobbins having metallic flanged ferrules instead of heads of some depth or a single belt engaging the flanged head from above and pressed down by an adjustable presser strip may be used. In a further modification the bobbins are automatically fed to the forwarding means, the bobbins 1 being dropped tip downwards into a funnel 129, Fig. 16, by which they are guided into successive pockets 130 in a drum 131 on the vertical shaft 132, plungers 133, Fig. 15, carried by the drum being reciprocated in the pockets by a fixed cam 136 and forcing the head of each bobbin in turn on to short spindles and between springs 138 fixed to sleeves rotatably mounted on extensions of links' in a feed chain 139 having guides 142 engaging a closed track 143 at the top of the machine. The feed chain 139 carries the bobbins between a pair of inclined belts 152 which free the ends from the bobbins, the latter being rotated by sprockets 169 on the rotatable sleeves carrying the springs 138, engaging a stationary length of chain 168. After the bobbins pass from between the belts 152, the yarn ends are carried by the latter between a pair of overlapping discs 174, one being fixed and the other rotating so as to trim the trailing yarn ends to a uniform length and, after moving through a U-shaped chest 172 to protect the yarn ends from air currents, the bobbins are carried past a rotating short flanged reel 175 over which the ends trail and are pressed into contact with the fabric-covered surface thereof by a spring loaded roller 177 ; to ensure the yarn being pulled from the bobbins in an axial direction, the yarn passing from the bobbins is given the right lead by headed pins 183 projecting from a belt 184 moving along and below the bobbins at the same speed as the bobbins leave the reel 175 and as the stripped bobbins approach the drum 131 a fixed cam forces them off the spindle of the chain 139 to fall down a shoot 187. The bobbins may be fed along the tracks by pivoted and spring- controlled fingers mounted on a wheel pivoted on a vertical or horizontal shaft above the tracks. The waste yarn wound on the brush clad cylinders may be removed by a rotatable cutter carrying a gear engaging a rack fixed to the machine frame and extending close to and parallel with the surface of the cylinder ; the cutter co-operates with a V-shaped blade on a carriage and as the carriage is slid along the rack, the blade moves under the yarn on the cylinder and the cutter is rotated to shear the yarn lengthwise of the reel.