Patent GB-229712-A (GB)
IPC: D21J3/00
Abstract: 229,712. Marks, E. C. R., (Brown Co.). Aug. 21, 1923. Moulding pulp. - A machine for manufacturing tubes or other hollow bodies from a web of material, such as pulp, comprises a pair of spaced-apart carrier wheels 5 rotated in unison and provided with a series of aligned mandrel-engaging devices, consisting of chuck bars 7 slidably mounted in pivoted arms 6 secured to the wheels 5, the aligned pairs of which are automatically operated to engage and hold the mandrels e while the rotation of the carrier wheels carries them to and from the winding position x. At the winding position x there are provided two base rolls c, d, between which the mandrels e rest, one at a time, while the pulp is being wound thereon, and a press roll g, the roll d serving to return an apron b which carries the web of pulp from the forming machine a through webbreaking mechanism k to the winding point. The mandrels e are fed singly to the carriers 5 from a feeding-table m and, after winding, are delivered to the receiving-table n, each carrier wheel being intermittently rotated by a link 57 provided at its end with a pivoted dog 58 which is adapted to engage one of several pins 60 provided on said wheels. The lower ends of the links 57 are guided by arms 63 journaled on the shafts 3, upon which the carrier wheels are mounted, while the dogs 58 are forced by a spring 59, provided on said links 57, to engage the pins 60 and are disengaged therefrom by finger 64 on a shaft 65. At the feeding and delivery tables m, n the chuck bars 7 are operated to engage with and disengage from the mandrels by means of racks or plungers 73, 74 respectively, Fig. 6, which are operated from a link 80<a> through a shaft 75. The various mechanisms are operated by timing mechanism, Fig. 15, which is controlled by the press roll g, the roll being mounted on slides 11 adapted to move vertically in guide plates 10 secured to the ends of the shafts 3 inside the carrier wheels. Each slide 11 is connected to a floating lever 18 by links 14, 17 and an intermediate link 15, the lever 18 being pivoted to a counterbalance-weight lever 21 and connected at one end to a rotatable disc 25, operating as a thiclsness adjustor, by means of a weighted cord 23. and at the other end to the arm of an eccentric 12. mounted on a shaft 55. On the disc 25 is provided a trip finger 27, and the disc 25 may be rotatably adjusted in order to position this trip finger so that, when a proper thickness of tube wall has been secured, the movement of the slide 11 through the cord 24 will cause said finger to operate the timing mechanism. The timing mechanism comprises three shafts 48, 87, 55 adapted to be rotated successively through clutch mechanism, provided with cams &c. In operation, when a tube has been completed, the trip finger 27 operates a clutch on the shaft 48. through linkwork 30, enabling said shaft 48 to rotate and operate the web-breaking mechanism k through cams 47 and links 45, 43, 51. The clutch on the shaft 87 is then operated by a pawl on the shaft 48 and, just before the shaft 87 has completed one revolution, a pawl connected thereto operates the clutch on the shaft 55, which then rotates. Rotation of the shaft 55 first raises the press roll g through the eccentric 12, then rotates the carrier wheels 5 forward by means of the link 57 and locks them in position by means of the fingers 64, after which the chuck bars 7 are operated through the link 80<a> and a cam 82. The web-breaking mechanism k is next released, and the winding of a new tube commenced. The web-breaking mechanism is described in Specification 229,987, while a drying machine, with transfer mechanism, for use in connection with the above tube-forming machine is described in Specification 229,988. [Class 34 (ii), Drying systems &c.]. Specifications 209,115 and 210.716 also are referred to.