Patent GB-712522-A (GB)
Title: Improvements relating to sliver roll formers for long staple fibres
Inventor: MACKIE JOHN PRINGLE
IPC: D01G15/62
Filed: 1950-01-02
Abstract: 712,522. Winding sliver rolls. MACKIE & SONS, Ltd., J. April 2, 1951 [Jan 2, 1950; Nov. 1, 1950], Nos. 78/50 and 26694/50. Addition to 594,929. Class 120(1) In a sliver roll winding machine, a roll is wound on a rotatable arbor provided with mechanism for withdrawing it from the roll upon, or shortly prior to, its completion, and the roll is subjected during its formation to a compressive force applied by pneumatic pressure. In one embodiment, Fig. 1, sliver 9 from a carding or other machine passes down a conductor 13 to be wound on a split-fork arbor on a shaft 15 mounted in an axially-movable bearing housing carried by a framework 22 slidable vertically in guides in a fixed supporting plate 1. At the start of the winding operation, shaft 15 is driven by frictional engagement of a roller 37 with a driven roller 38. As the roll builds up, framework 22 rises until roller 37 is raised out of contact with roller 38, after which the roll is rotated by peripheral engagement with two driving rollers 4, 5. Upward movement of framework 22 is resisted by a connecting rod 50 secured to a piston operating in a cylinder 53 against the action of compressed air supplied through a pipe 87. As the roll formation nears completion, the top of framework 22 raises a rod 56 adjustably mounted in a bellcrank lever 58 which pivots to release a catch 60, 61 and allow a link 65 to fall under the action of a weighted arm 68. Movement of link 65 operates two valves 81, 82 to release the air pressure on the piston in cylinder 53 and at the same time to connect compresse'd air to one side of a cylinder 19 to effect withdrawal of the arbor from the roll, after which the framework 22 falls to its initial bottom position as air escapes from the lower part of cylinder 53 through a needle valve. Shortly after the arbor is withdrawn, the top of the roll contacts a driven upper roller 100 mounted in a vertically slidable bracket 104. As roller 100 is lifted by the roll a lever 109 is released from a catch and falls to bring a spiked doffing member 111 into contact with the top of the roll whereby the roll is doffed and ejected from the machine; as the doffed roll moves to the right it raises lever 109 into re-engagement with its catch and also depresses an extension 120 of lever 68 so that, when the roll reaches a position where its edge is clear of the path of insertion of the arbor, link 65 is raised to its initial position, thus re-engaging catch 60, 61 and restoring valves 81, 82 to their former position. Air pressure is thereby restored to the top of cylinder 53 and the arbor is moved inwardly to engage the sliver 9 and then allowed to drop so that roller 37 contacts roller 38. The sliver is parted by the motion of the ejected roll and the rotation of the arbor as it starts to wind a new roll. In another embodiment, Fig 8, a roll 153 is formed on two half-arbors 123, 124 (not shown) which can be moved towards and away from each other by compressed air cylinders 129 and 130 (not shown) respectively. A rubbercovered driving roller 142 on a pivoted arm 140 is pressed against the roll surface by compresed air acting on a piston 165 in a cylinder 166. During the build-up of the roll a lever 154 is held in a depressed position, against the pull of a spring 156, by a latch 157. As the roll nears completion its surface bears on a driven roller 170 which yields against a spring 143. When the roll reaches a certain size, lever 140 is moved to a position where a pin 176 forces latch 157 to the position shown, permitting lever 154 to rise under the action of spring 156. Movement of lever 154 operates a valve 162 to release the air pressure in cylinder 166 and connect compressed air to cylinders 129, 130 so that the half-arbors are withdrawn from the roll. and thereafter to permit a small flow of compressed air to cylinder 166 whereby roller 142 makes a controlled movement to the right to eject the completed roll. During its ejection the roll depresses lever 154 to move valve 162 to its former position' whereby the half-arbors are reinserted to start winding a fresh roll and full pressure is re-applied to cylinder 166. lever 154 being held in its depressed position by latch 157. Arbor insertion is timed to take place as soon as the edge of the roll moves clear of their path of movement. According to the first Provisional Specification, a machine such as that shown in Fig. 8 may have a single arbor instead of half-arbors. Manual control may be provided for starting an ejecting operation at any time during winding. According to the second Provisional Specification, a machine as shown in Fig. 1, may have an arbor with projecting pins and may have a polished plate instead of roller 100. Specifications 323,416, [CLass 120(i)], 485,278, 561,447 and 712,597 are referred to.