Patent GB-327471-A (GB)
Title: Improvements relating to cigarette making machinery
IPC: A24C5/52
Filed: 1929-01-11
Abstract: 327,471. Bunting, F., and Gee, H. Jan. 11, 1929. Cigarette-making machines. -A continuous-rod machine is provided with a number of feeding devices, working synchronously, for depositing separate filling materials on the paper web to produce composite cigarettes having two or more sections of different grades of tobacco or other materials. For manufacturing cigarettes having a stub of oakum at one end, as described in Specification 286,904, the machine comprises means for intermittently feeding and severing sections from a rope of stub material, and means for feeding and intermittently shearing off a quantity of tobacco and depositing the stub section and the tobacco alternately on the moving paper web. Adhesive is applied to those portions of the paper web on which stubs are to be applied, by means (not shown) fitted to the printing, or tipping and printing, mechanism. Bridge type.-In one form, Figs. 3, 5, 6 and 8, the feeding &c. mechanism is carried by a box-like casting 1 supported over the paper web trough 2 of a continuous-rod machine by a bridge 3. Tobacco is fed from a hopper by a belt or other means (not shown) to a feed throat 12 in the base of the casting 1, and by a reciprocating feed comb 60 to an outlet 13 leading to a guillotine chamber 11. The comb 60 has prongs 59 depending through a perforated roof or guard plate 58, and is actuated from eccentrics 64 on an overhead shaft 51 through connecting-rods 61, 62, the rod 61 being pivoted upon a sliding block 63. The tobacco in the chamber 11 is sheared off and deposited on the paper web by a guillotine A having a cutter blade 4 with a longitudinal channel 8, having a stepped portion 9 and a depending tongue 10, Fig. 3. The blade 4 is carried by crank pins 6 on discs 5 on shafts 7, the movement of the blade being such that the severed tobacco is thrown forward on the moving paper web. The shafts 7 are driven through toothed gearing 16, 17 from a main shaft 18. The stub sections are cut from a rope entering a bellmouthed tube 29, in which it is fed forward by a comb 24 having teeth entering a slot in the tube. The comb 24 is reciprocated from a gear wheel 19 driven from one of the gears 16 and having a stepped crank-pin 22 actuating links 20, 21 pivoted to an arm 23 on the comb 24, one link 20 being also pivoted in a slide block 25. The tube 29 leads to a stub chamber 31, Fig. 3, the stub section in which is severed by a disc cutter 55 having a cam-like periphery 56, Fig. 15, and mounted on a shaft 54 driven by sprocket gearing from the overhead. shaft 51, which is driven by sprocket gearing 49 and bevel gearing 46, Fig. 5, from one of the shafts 7. The severed stub is fed forward into the guillotine chamber 11 by a stubpositioning block 34, Fig. 8, sunk in the wall of the chamber 11 and having a serrated feed surface 33, Fig. 3. The block 34 is reciprocated by a bell-crank 35 actuated by a cam 43 on one of the shafts 7. The stub is deposited on the paper web, behind a section of tobacco, by the downward movement of the guillotine blade 4, the tongue 10 of which engages behind the stub; and the stub is pressed on the adhesived surface of the web by the stepped part 9 of the blade. The loaded web moves forward to known forming and cutting mechanism, the latter severing the cigarette rod alternately through tobacco and stub. Suspended type.-In a modification, Figs. 11, 14 and 15, the main casing 1 of the mechanism is suspended from the tobacco delivery hopper H, Fig. 1, or is supported on a bracket mounted on the frame of the cigarette machine, or on a separate pillar or standard; and modified stub and tobacco feed mechanisms are employed. The tobacco falls into a hopper 74, having a wall 75 vibrated by means of a square cam 76 on a shaft 77, and is fed through a throat 12 by rollers 81, 82, 83 provided with clearing blades 84, 85, 86. The roller shafts are driven through toothed gearing from the main shaft 18. The roller 81 is toothed, the roller 82 smooth, and the roller 83 provided with alternate sections of long and short teeth, the long teeth feeding tobacco into the guillotine chamber 11 and the short teeth packing the tobacco in the throat 12 when the guillotine blade is in its lowered position. The rollers 81, 82, 83 may be replaced by a reciprocating feed comb having teeth projecting through slots in the roof of the feed throat 12. The guillotine mechanism is actuated as in the bridge type of machine, but may be geared to act twice in each rotation of the feeding rollers 81 - - 83. The guillotine blade may have a detachable edge portion 123 of high quality steel, which may be waved or serrated. The stub rope is fed through the tube 29 by a spiked feed-wheel 133, Fig. 14, driven from the shaft 87 of the feed roller 81 through toothed and worm gearing 90, 128 - - 132, the circumference of the worm 129 having a pitched section and an unpitched section, so that the worm wheel 130 and the feed-wheel 133 are driven intermittently. The shaft 54 of the disc cutter 55 is driven by toothed gearing from the shaft 88 of the feed roller 82, and the severed stub section is fed to the guillotine chamber 11 by a cam-actuated positioning block similar to 34, Fig. 8. The cover 134 forming the outer wall of the guillotine chamber 11 is secured by means of screw studs, or may be hinged, and can be removed or swung open without disturbing the setting of the positioning mechanism &c. In a modification of the stub feeding and positioning mechanism, Fig. 19, a vertical spindle 171, driven through bevel gearing from the cross shaft 107, Fig. 11, carries a cam 172 and a disc crank 173. A hook-ended bar 174 actuated by the cam 172 rocks the lever 175 connected to the stub-positioning block 35. The stub-feeding comb 24 is actuated from the disc crank 173 through links 20, 21 connected to a stepped crank-pin 22, the link 20 being pivoted upon a slide block 25. Stub rope draw-off mechanism.-The stub rope B is drawn from a drum 166, Fig. 1, provided with a friction brake, and through a tapered guide 161 to feed wheels 154, the peripheries of which are fitted with grooved rubber or composition inserts. The spindles of the wheels 154 are geared together and driven through sprocket and worm gearing. The last wheel 154 is provided with a jockey pulley 162 and a finger for releasing the rope from the groove, and the rope is delivered in a hanging loop to the tube 29.