Patent GB-190803882-A (GB)
Title: Improvements in and relating to Printing Presses.
Inventor: LAKE WILLIAM EDWARD
Filed: 1908-02-20
Granted: 1909-05-20
Abstract: 3882. Lake, W. E., [Walkup, S. T.]. Feb. 20. Feeding - apparatus for webs.-In apparatus for conveying paper rolls to printing-machines and for removing the exhausted roll, the rolls 1, Fig. 1, are conveyed from the street to the bottom floor by a sprocket-chain carrier 3, and are raised to the different floors by a hoist 40 having pivoted books for engaging under the spindles of the rolls, the rolls being transferred from the end of the floors to the machine, and the spent rolls being removed by means of carriers 88, 89, Fig. 9, operated by an endless cable 75 passing round pulleys 76, 77, 78 and a drum 79. The carrier 3, hoist 40, and cable 75 may be reversed by means of clutches 17 (Fig. 1<a>), and 38, 86 (Fig. 6), respectively, communicating through chain gearing, with the driving - shaft 24, which may be connected to an electric motor by a clutch 26, or to the printing- machine by gearing 27. The clutch 17, Fig. 1<a>, is operated through worm gearing from a handwheel 11, Fig. 1, and a brake 21, Fig. 1<a>, connected to the clutchoperating mechanism by levers 22, retains the carrier in the inoperative position while reversing the clutch. The clutches 86 on the different floors are connected by bevelgearing. The hoist 40, Fig. 1, is raised or lowered by flexible connexions 42 passing round pulleys 45 to winding - drums 47, Fig. 6, which can be connected by friction clutches 38 with chain gearing 32 or chain gearing 37 in order to rotate them in one or other direction. When the hoisting-device 40, Fig. 1, descends to its lowest position, its motion is reversed by a pin 48 on the device striking an arm 49 and releasing a spring catch 50 from a rod 52, which, under the action of its spring 54, then changes the position of the friction clutch 38, Fig. 6, by means of an arm 56, Fig. 25, and a shaft 55. The clutch 38 may be operated by a hand-lever 55<a>, and the mechanism may be stopped in an intermediate position by a pivoted dog 56<a> on the arm 56 engaging a fixed lug 56<b>, the dog 56<a> being released by a treadle 55<b>. The rolls are conveyed from the hoist 40, Fig. 7, to the different floors by levers 58, which drop beneath the spindles of the web roll on the hooks 41 as the hoist 40 passes them. A stop 48 on the hoist then strikes against a lever 59 and causes a pawl 67 thereon to engage under a stop 70 and raise the rod 52, thereby reversing the hoist, the rod 52 being held in its raised position by the spring catch 50. As the hoist descends, the web roll is left on the levers 58, and, rolling to their rear end, holds the front ends of the levers 58, 59 out of the path of the hoist until the roll is removed. The clutches 38 can be kept in the inoperative position to stop the hoist by a pivoted dog on the arm 56, Fig. 25, bearing on the floor. When the horizontally-moving carrier 88, Fig. 9, is moved backwards, a finger 114 on the cable 75, by engaging a stud 115, depresses the short arm of the lever 58 and stops 61 below an incline, and allows the roll to descend the incline into position behind the spring plunger 90 on the carrier. The plunger 90 is drawn downwards at the end of its forward movement by the cam action of grooves. with which a lateral pin on the plunger engages. In order to stop or reverse the movement of the cable 75, a clutch 86, Fig. 12, connected to the driving-shaft of the cable drum 79, is operated through a bell-crank lever 106 by a combined internal cam 104 and pivoted switch 105<a>, with which a roller 103 on the sliding rod 102 carrying a second roller 100 engages. When the carrier 88 reaches its forward position, a latch 99 is disengaged from the frame 101 of the roller 100 by means of an arm on the carrier, and a spring 105 then moves the rcd 102 until the roller 100 bears against the web roll, the clutch being simultaneously shifted by means of the cam into the inoperative position. When the web roll is exhausted, the roller 103 moves further along the cam and reverses the clutch, so that the carrier 89 descends and the carrier 88 travels backwards. The roller 103 is carried by a loose collar 301 arranged together with a spiral spring 300 on the rod 102 between two fixed collars 304, 302, and a pivoted bevelled clutch 305 allows the collar 301 to move with the rod 102 in one direction, but prevents it from moving back. As the carrier 89 descends, a cam-surface thereon moves the rod 102 backwards, and the carrier 89 is forced backwards by the spindle of the exhausted roll engaging a cam-portion 96, Fig. 9, until the carrier 89 springs under the spindle. The collar 304, Fig. 12, on the backwardly-moving rod 102 then acts on an arm 309 and releases the spring catch 305 from the collar 301, so that the spring 300 forces the roller 103 backwards and thereby reverses the clutch, the latch 99 being also thrown into engagement with the frame 101 of the roller 100. The two parts of the bell-crank lever are connected by a detachable pin, which is removed when operating the clutch 86 by band When the carrier 89, Fig. 9, descends, the camsurface 96 thereon strikes against a roller 139 on crank levers 137, 138 and depresses pivoted spring stops 135, which normally prevent the supply of the web to the machine. The stops 135 may be operated by hand. The web is fed forwards to the printing-machine by endless tapes 121, 122, Fig. 9, is guided through the machine by plates and tapes, and is carried over the folding-mechanism to the delivery mechanism by a third set of tapes. When the carrier 89 starts to rise, the web core spindle, by contacting with the pivoted trigger 119, Fig. 10, throws a clamp 117 against the core, the breaking of the web, if any paper remains on the core, being aided by points 117<a> on the clamp. The clamp 117 may be looked by a pin 120<b>. The empty rolls are removed from the carriers 89, Fig. 19, as they descend, by pivoted dogs 225 at the inner ends of inclined bars 223, and rest against spring stops 226 until the latter are depressed by means of cables 227 and treadles ; the rolls then roll to the outer end of the bars 223 and 'are removed by an extension 215 on the rising carrier 40. When a part 217 of the extension 215 strikes an arm 218 on the rod 52, the motion of the carrier 40 is reversed and the empty roll is left on a pivoted dog 220, from whence it rolls along bars 221 to any suitable floor. A friction brake for engaging a grooved disk on the web-roll spindle is provided with two shoes fixed together by a pivoted hand-wheel and screw to adjust the tension of the web, and is slidably mounted on a track so that the web-roll spindle and the brake may be adjusted laterally by a screw rotatably mounted in the brake and engaging the framework of the machine. The haud-wheel is tilted back before raising the upper brake shoe to allow the empty spindle and core to be removed. A modified device for delivering new web rolls to the different floors comprises a sliding piece 235, Fig. 23, and a spring stop 239 for retaining the web roll on the delivery device, and the piece 235 is drawn out of the path of the carrier 40 in opposition to a spring 237 by the weight of the web roll bearing against the stop 239, or by means of a cable and levers arranged beneath the treadles employed for operating the stops 226, Fig. 19. The spring stop 239, Fig. 23, is drawn downwards when the carrier block 88 is moved outwards by the end 249 of an arm 248 of the block 88 engaging a depending part 241 of the stop 236. This depending part simultaneously depresses a spring catch 255, which forces a pivoted spring dog 259 out of engagement with a projection on a rod 263 and allows a spring 267 on the rod to throw over a pivoted arm 265 against pins 274 on the grooved head of the web-roll spindle, thereby giving the web roll a partial turn to start the unwinding of the roll. The spring 267 is compressed, when the arm 248 moves outwards, by a projection on the arm engaging a loose collar 271<a> on the rod 263, and the rod 263 is restored to its original position, when the arm 248 moves inwards, by the arm engaging a projection 273 on the rod, the arm 248 finally being drawn over the projection 273 by the motion of a cam face 253 on pins 251. The arm 265 is provided at its end with spring pins having hemispherical upper ends in order to prevent the arm from locking the web roll. In order to prevent the web-roll spindle from jumping over the stop 239, the spindle, of square cross-section, rests in a corresponding bearing 290, Fig. 28, in a lever 288, in front of the stop, the lever being depressed by the block 88 when the latter is moved outwards, or by hand. Specifications No. 7860, A.D. 1896, and No. 18,450, A.D. 1906, are referred to.