Patent GB-191421827-A (GB)
Title: Improvements in and relating to Machines for Making Paper Tubes and the like.
IPC: B31C1/00
Filed: 1914-10-31
Granted: 1915-10-07
Abstract: 21,827. McLintock, D. M., and White & Sons, T. Oct. 31. Paper tubes.-In a paper-tube machine having an oscillating feeddevice which feeds paper to a gripping-slot in the mandrel on which the tube is wound, adhesive is applied to the paper as it is being wound, but not to the last lap which forms the outside of the finished tube, and means may be provided to render the adhesive-applying device inoperative in the event of failure of the mandrel to receive a supply of paper. The paper is drawn from a reel (not shown) and passes over two rods 52, which give it a preliminary curl to lessen its tendency to unwind from the mandrel, and then between a spring-pressed plate 50 and stirrup member 49 constituting a friction-grip feed-device carried by oscillating arms 35 pivoted at 36. Oscillating arms 40, having a more limited movement than the arms 35 to which they are connected by a spring 55 under adjustable tension, carry a plate 41 over which the member 49 has a limited sliding movement. The plate 41 has guides 43, one of which is adjustable, for guiding the edges of the paper strip. Assuming the paper to be passed through the grip device 49, 50, and its end to be brought to the edge 42 of the plate 41, on starting the machine, the arms 35 move towards the mandrel until a set-screw 57 carried by the arms 35 engages a projection 58 on the arms 40. The paper is thus protruded over the edge of the plate 41. The arms then move together, feeding the paper into a slot in the mandrel. When the paper has been gripped, the mandrel is rotated to wind the tube. The arms 35, 40 move away, the paper slipping through the friction-grip device. The arms 40 are first brought to rest by a screw 45 engaging a stop 46, the arms 35 making a further limited movement to give the necessary margin of paper for subsequent insertion in the slot of the mandrel. The paper is then severed by a rapid oscillation of an arm 59 carrying a knife 61, which co-operates with the edge 42 of the plate 41. A roller 72 carried by an oscillating arm 67 receives a supply of adhesive when in contact with a roller 73 rotating in a trough 74, and is then moved into contact with the paper on the mandrel to apply adhesive during the winding of the tube. The roller 72 is returned to the roller 73 before completion of the winding, so as to leave the exterior of the tube without adhesive. A presser roll 77 carried by one arm of a lever 88 pivoted at 79, bears against the tube as it is being wonnd, and after the roller 72 has moved away, a concave presser 78 is moved up to give a finishing-pressure. The finished tube is dotted by a sliding sleeve 20. Should the mandrel fail to receive a supply of paper, the extra inward movement of the roller 77 due to the absence of paper is communicated by a pin 89 on the lever 88 to a lever 91 pivoted at 92, so as to move the end 91<a> of the lever 91 into the path of a projecting arm 94 of the lever 67. The roller 72 is thus held away from the mandrel. The movements of the parts are controlled by cams (not shown), a suitable resilient device being interposed between the arm 67 and its cam, to absorb the effort of the cam should the movement of the arm 67 be arrested as just described. The mandrel is rotated intermittently by a pinion and toothed segment, and is locked in the stationary position by mutilated disks. The mandrel comprises a sleeve member having a longitudinal slot with undercut edges, one edge 12 being helically disposed, and the other edge 13 being parallel to the axis of the mandrel, as shown in development, Fig. 7. A co-operating tongue member 14 capable of longitudinal and slight rotary movement is guided by a pin 18 and slot 17 so as to move parallely from or towards the edge 13, with which it co-operates to grip the paper.