Patent GB-108618-A (GB)
Title: Improvements in Machines for Reinforcing Paper and the like.
Inventor: HOWARD CHARLES HENRY
IPC: D21F11/00
Filed: 1916-12-01
Abstract: 108,618. Howard, C. H. Dec. 1, 1916. Reinforced paper; strengthening with threads and fabrics.-In a machine for reinforcing paper or the like with crossed threads, the transverse threads are stretched across the machine by thread-carrying arms 40, and conducted by spring clips 100 on continuously driven chains 98 to the adhesive-coated paper or the like 25, 22. The longitudinal threads 29 above the transverse threads alternate with the threads 28 below the transverse threads. Threads from spools 50, on one side of the machine, are gripped between fixed jaws 54 and spring jaws 56 on the arms 40, and are carried to the middle position, shown in Fig. 3, by means of a cam on the shaft 18 rocking a shaft 35 to which the arms 40 are attached. In the middle position, the threads are seized by jaws 60, 62, on arms 40 on the other side of the machine, and by these the threads are drawn through the jaws 54, 56 and carried to the other side of the machine. The threads 57 are then lowered into the dotted-line position, Fig 3, by the action of another cam on the shaft 18 which, by means of arms 77, 34, mounted on shafts 33, lowers the shaft 35 on which the arms 40 are mounted. The threads are then cut by a knife 92, Fig. 8, just outside the clips 100 on the spool side of the machine, leaving the thread ends still held between the jaws 54, 56. The knife 92 is secured to a plate 91 mounted on studs 89 resting on a lever 81 operated by a spring 82 and by a cam 85 engaging a finger 87 and a roll 84 connected to the lever 81. The knife is normally below the threads, and the sudden lifting of the knife to cut the threads is produced by a projection 88 on the cam 85 co-operating with the finger 87. At the same time, or immediately afterwards, the jaws 60, 62 are opened by still another cam on the shaft 18, operating a lever 74, which lifts a lever 68, the end of which, by engaging a roller 69, lifts sleeves 70 on the arms 41. The sleeves 70 carry a lifter 72 which underlies a series of projections 65 on the jaw-operating rods 64. A spring 63, co-operating with the last-mentioned cam, closes the jaws 60, 62 on the ends of thread presented to them by the jaws 54, 56 in the middle position. The spring clips 100 have their advancing end portions turned upwards and engage the threads presented to them by the grippers. The threads are carried by the clips 100 to the material 25 while passing round the roll 24, which lifts the material slightly above the plane of the transverse threads, pressure of the threads on the adhesive surface being thus effected by tension. Cams 103, Fig. 11, by engaging projections 101 on the clips '100, lift the clips to free the threads, and projections 105 on brackets 103 press the freed thread ends down on the gummed surface. The thread arms 40 are each operatively connected to the shaft 35 by catches 46, and may be disengaged for repairs or adjustment. The material 25 may be coated with adhesive by a roller 27, Fig. 1, or adhesive material to be reinforced may be moistened thereby. The layer 22 may be dispensed with, or both layers may be dispensed with, the threads being stuck together in the machine, and subsequently applied to the material to be reinforced.