Patent GB-229988-A (GB)
Title: Machine for manufacturing tubes and other hollow bodies made from pulp
IPC: D21J3/00
Filed: 1923-08-21
Abstract: 229,988. Marks, E. C. R., (Brown Co.). Aug. 21, 1923. Endless-band conveyers, articles carried by; charging and discharging; absorption apparatus.- A machine for manufacturing tubes &c. from a web of pulp comprises a tube former, a drier, and mechanism controlled electrically by the timing- mechanism of the former, for transferring the tubes from the former to the drier and subsequently conveying them in a step-by-step movement through the drier to the receiving conveyer for the dried tubes. The pulp is conveyed upon a. felt b, Figs. 1 and 2, from the pulp machine a to the winding position x and is wound upon hollow mandrels e, which are supported in turn upon rotary rollers c, d, the mandrels with their tubes being fed intermittently to a table n from which they are picked up by transfer chains 152 having chuck-bars 153 adapted to be engaged with the ends of the mandrels. The chains are driven intermittently through sprockets 155 so as to convey the mandrels with their tubes to the drier which consists of ten superposed stages each comprising endless chain conveyers 232 having rollers 234 between which the mandrels are supported. The dried tubes are received in buckets 287 secured to a conveyer arranged at the discharge end of the drier. The mandrels are conveyed in turn from the winding-position to the table n adjacent to the transfer chains by wheels 5, Figs. 3 and 4, arranged at each side of the machine and mounted upon shafts 3 supported by the frame 1, 2 and having chuck-bars 7 adapted to be engaged with the mandrels. At the winding-position, the mandrels are pressed by an absorbent roller g carried at its ends in slides 11 working in guides 10 at opposite sides of the machine. During the winding operation, the slides are raised so as to rotate, through links 14, 17, 18 and a cord 23 wound upon a drum, a thickness adjuster 25 carrying a trip 27 which, when a tube has been completely wound upon a mandrel, engages with a dog 28 carried by a lever 29 which through a shaft 30 and intervening gears effects the rotation of the shaft 55. The rotation of the shaft 55 effects, through cranks 56 and links 57 arranged at opposite sides of the machine, the movement of a pawl 58 that engages with the pins 60 on the links 6 of the wheels 5 so as to rotate the wheels and effect the transfer of the mandrels from the winding-rollers c, d to the table n. Whenever a mandrel with its tube is delivered to the table n it is engaged by the chuck-bars of the transfer chains 152 and moved upwardly one step, this operation being effected electrically through solenoids B, E, K actuated by the completion of the circuit through the conductors 138 by an intermittently rotatable contact ring 136 mounted frictionally upon the shaft 132 of the timing-gear. After each tenth mandrel has been engaged by the transfer chains and the chains moved forward, a mandrel is brought opposite to the front end of each stage of the drier. At this stage, through the medium of an electromagnet H and intermediate gearing, the gear-wheel 243 is rotated so as to reciprocate a rack 239, Fig. 15, which engages with gearwheels 236 mounted upon and intermittently engaged with shafts 228 having gear-wheels 227 meshing with gear-wheels 226. The gear-wheels 226 carry links 224 which are connected to cranks 223 mounted upon shafts 222 and carrying arms 219 that are moved into the dotted line position to receive the madrels which are automatically released from the transfer chains 152. The continued movement of the arms results in the discharge of the mandrels into the spaces between the supporting-rollers on the drier conveyers 232. Simultaneously with the feeding of the mandrels into the drier a like number with their dried tubes are discharged into the buckets 287 of an intermittently driven conveyer 286 which discharges the mandrels on to a platform 285. The timing- mechanism and the tube-forming apparatus form the subject-matter of Specifications 229,712 and 229,987, [both in Class 99 (ii), Pipes, tubes, &c.].