Patent GB-105382-A (GB)
IPC: B05C1/08
Abstract: 105,382. Peters, M. E., Fath, G. H., and Miller, A. F. April 7, 1916. Coating-machines. - In a gumming-machine, blanks are fed singly to, and carried forward by, a cylinder supplied with a regulatable amount of gum and having a movable segment portion on which the forward edge of the blank rests, and means are provided to open the segment once in each revolution of the cylinder so that the gummed blank may be gripped and removed by conveying- means away from the cylinder. The blank-feeding means comprises a roller with air-suction apertures, and means are provided for automatically stopping the feed if a crumpled or badly alined blank is placed in the machine. In the machine shown, the blanks are fed by a roller 5 to a gumming-cylinder 6 and removed by a cylinder B cooperating with a conveyer, the gum being supplied from a pan 126 by rolls 131, 136 coacting with a gum-regulating roll 137, all of which rolls are adjustable. The rollers and cylinders are all driven from the shaft 4 of the gumming-cylinder, which is actuated through bevel-gear 26 by a vertical shaft 28. The feed-roll shaft 3 is carried by levers 11 supported by a counterweighted rocking-shaft 14, set-screws being provided to limit the movement of the roll to and from, and to maintain it always slightly clear of, the gumming-cylinder. A disk 52 on the shaft 3 co-operates with a cam on the shaft 4 to move the roller 5 clear of the gumming-cylinder immediately the blank is gummed. This cam comprises two disks 53, which are each provided with a raised peripheral part and are relatively rotatably adjustable for varying the duration of the operative period. The blanks are automatically delivered to the roll 5 and carried thereon by a renewable parchment or like pad B, Fig. 7, which is cut to the shape of the blank and secured to the roller by a clamping-strip 42 and a longitudinally-slotted rotatable spindle 45, which grips the end of, and stretches, the pad. The shaft 3 is driven from the shaft 4 by mutilated gearing 10, 19 which maintains the roll 5 stationary, in the position shown in Fig. 3, for a short time during each revolution. Whilst so positioned, a blank is fed over holes 32 communicating through a passage 33 with a thimble 36 on the shaft-end, which is exhausted of air by a pump connected thereto by a pipe 40. A presserbar 120, with notches opposite the holes 32 and carried bv a lever 121 actuated by a spring 124 and a cam 123 on the shaft 4, forces the blank on to the holes 32, the suction through which maintains the blank against the feed-rollers as it rotates. A pipe 41 and nipple 119 connect the thimble 36 with a chamber 106, Fig. 2, containing a flexible diaphragm normally pressed outwards by a spring so as to project a stop 94 into the path of an arm 90, which is rocked through linkage by a cam 81 on the gear-wheel 19. The diaphragm chamber is carried by a rockarm 101 coupled by a yoke 102 to a hub 95, which is feather-keyed to the shaft 3 and may be moved axially. against the action of a spring 99, to disengage the shaft from the loose gear-wheel 10. When a blank is out of alinement or crumpled, it fails to cover the apertures 32, the vacuum is destroved, the stop 94 projects and is struck by the rock-arm 90, and the gear-wheel 10 is uncoupled from the feed-roller shaft, which therefore does not rotate. When the blank is placed correctly, the suction through the pipe 41 acts on the diaphragm to withdraw the stop 94 out of the path of the arm 90, and thus obviates the uncoupling of the gear-wheel 10. The gumming-cylinder 6, preferably of brass, is provided with a segment 64, which is normally pressed by a spring into a longitudinal gap 59, but is withdrawn therefrom, when in the position shown in Fig. 3, by a cam fixed to the machine frame and' coacting with an arm on a shaft 61 about which the segment turns. The gumming-cylinder is so timed that the rear edge of the segment 64 receives the forward edge of the blank carried forward by the feed-roller; the blank adheres to the gumming-cylinder and is carried forward thereby until the segment is retracted, whereupon the edge of the blank is exposed to the gripping-fingers of the conveyer. The transmission cylinder 8, rotated intermittently by mutilated gearing 18, 20, is provided with a gap to accommodate the gripping- fingers 80 and cross-bars 78, 79 of an endless conveyer, which also comprises sprocket chains 75 connected by aprons 77, preferably of canvas. The gum or glue supplying apparatus comprises a sliding carriage 127 on each side of the machine adjusted by a screw 15A to vary the pressure of the supplying-roller against the distributing-roller 136. A gum-regulating roll 137, carried in bearings 139 with open sides supported on pivoted links 140, is adjustably pressed against the roll 131 by screws 142 in yokes 143 adapted to be swung back about pins 146 and normally maintained in the position shown by pins 147, which are held in the locking or retracted position by a spring ring in the yoke co-operating with either of two annular grooves in the pin. The trunnions 158 of the roller 136 are each adjusted vertically by a screwed stem 162, which engages the journals 151 and is rota. table and slideable in a cap 159 secured by swing bolts 160. A lever 153, which engages beneath the journal 151, is provided at each side of the machine, so that either or both ends of the roll 136 may be raised from the cylinder 6 against the pressure of a spring 165, the lever being maintained in the raised and lowered positions by the engagement of a lateral spring-pressed pir on the lever with holes 173, 174 on the framing.