Patent GB-1217482-A (GB)
Title: Improvements in and relating to machines for forming wound rolls of sheet material
Inventor: BALL DOUGLAS WILLIAM HENRY
IPC: B65H19/22
Filed: 1966-10-05
Abstract: 1,217,482. Feeding webs. T. H. DIXON & CO. Ltd. 5 Jan., 1968 [5 Oct., 1966], No. 44468/66. Heading B8R. A machine for continuously rewinding webs of material, e.g. toilet tissue issuing from a transverse-perforating machine, into rolls of predetermined diameter or reeled length comprises (1) a continuously-rotating winding beam 6, Fig. 1, provided with two pairs of winding rollers 11 operable alternately on the web 10 during each half revolution of the beam to wind the web into a roll 24, Fig. 2, on a core 3 fed from a container 2, (2) transfer means operable during each half revolution of the beam to remove a core from the container, rotate it to a speed equal to the web speed and deposit it on that part of the web passing over the temporarily inoperative pair of rollers 11, (3) means 17 to apply top pressure to the core and the roll being wound thereon, (4) means 33, 34 to sever the end of a completed roll and (5) means 27 to eject the completed and severed roll. At the initial position, Figs. 1, 18, where winding commences at the right-hand pair of rollers 11, air jets from nozzles 20, 23, Fig. 1, cause the severed leading end of the web to be applied to the core 3. The beam 6 comprises two arms 8 carryng the winding rollers 11 and fixed to a shaft 133, Fig. 18, at each end of the machine, the shafts being rotated by worm gearing from driving shafts to turn the beam counterclockwise, Figs. 1, 18. Arms 12 forming a beam 7 carry the core transfer means 25, Fig. 2, described below and the pressure-applying means which comprise rollers 17. The arms 12 are fixed to a shaft 44 journalled in vertically slidable bearings 73 attached by cables 14 to counterweights 13. The shaft 44 is driven in a clockwise direction by worm gearing which permits of vertical movement of the shaft 44 and so that the angular speed of the arms 12 is equal to but in the opposite direction to that of the arms 8. Upward movement of the shaft 44 is caused by the upward movement of the operative roller 17, Fig. 2, due to the upward movement of the operative rollers 11 and the increasing diameter of the interposed roll 24. The rollers 17 are rotatably mounted with limited sideways movement on plate members 50, 51, Fig. 18, secured to shafts 48, 49, Figs. 9, 13 fixed to gears 46, 47 meshing with a non-driven gear 45 rotatably mounted on the shaft 44, to maintain the plates in a vertical position as the arms 12 rotate. Rotatably and slidably mounted on the plates 50, 51 are arms 82, Fig. 9, with sprockets 83 at one end engaging racks 85 having cam-follower rollers 86. At their other ends the arms 82 have pneumatic cylinders 76, Fig. 9, for moving core holders 74 into the ends of a core 3. During the rotation of the upper beam 7, the engagement of follower roller 86 with a cam 87, Fig. 1, causes movement of the arms 82 associated with the inoperative roller 17 so that the cylinders 76 thereon release a core 3 from the outlet 5 of a container 2, grip the core by pneumatic operation of the cylinders 76, and carry the core into contact with the roller 17. After subsequent rotation of the beams 6, 7, the roller 17 engages a driven band 31, Fig. 2, which rotates the roller and the core 3. When the roller 17 approaches the start of winding position shown at the right-hand end in Figs. 1 and 18, pulleys 21 are actuated by rack mechanism to move another band 32 into contact with the roller 17 so as to rotate the core 3 at web speed. At the same time, the air jets 20, Figs. 1, 2, associated with the pulleys 21, and the air jets 23 are rendered operative to apply the web 10 to the core 3. Also, at this stage, a reversely driven roller 33 on the beam 6 coacts with one of two rollers 34 on the beam 7 to break the web across a transverse perforation line. During movement of the beams from the initial position, the completed roll at the left hand end is ejected by fixed members 27, Fig. 2; the roll may subsequently be cut into shorter lengths. The pairs of rollers 11 are journalled in plates 54, 55, Fig. 8, maintained in a vertical position by gearing similar to the gearing 45 ... 47 holding the plates 50, 51 vertically and having recesses 53 engaged by projections 52 on the plates 50, 51 to maintain each set of rollers 17, 11 in correct alignment. The rollers 11 are driven at web speed by chain and sprocket gearing from a shaft (72, Fig. 16), extending through and inwardly of one of the shafts 133, Fig. 18. Switches (155, 156, Figs. 14, 15) on the shaft 133 operate valves controlling the air supply to the jets 20, 23.