Patent GB-191418907-A (GB)
Title: Improvements in the Inking Mechanism of a Rotary or Cylinder Printing Press.
Inventor: WALKER ARTHUR HENRY
IPC: B41F31/00
Filed: 1914-05-11
Granted: 1915-06-11
Abstract: 18,907. Walker, A. H., [Wood, H. A. W.]. May 11. Inking - apparatus.- Relates to inking-mechanism for rotary and cylinder printing- presses, of the kind in which the ink is taken from a slowly and continuously rotating fountain roll by a rapidly rotating pick-up roll, the adjacent surfaces of these rolls passing each other in opposite directions, and consists in the provision of means for varying the speed of the fountain roll relatively to the pick-up roll, in improved means for mounting the pickup roll, and for mounting, adjusting, and vibrating the distributing - rolls, and in the provision of an adjustable scraper beneath the level of the ink in the fountain. The inking- mechanism is mounted on a sliding carriage 228, Fig. 3, movable to and from the plate cylinder 172 by rack-and-pinion gearing, and locked in the operative position by rackoperated sliding pins. To ensure uniform inking of the formes, the composition forme rolls 304, 258 are of different diameters, and the roll 258 is inked by direct contact with the metal distributing - cylinder 245 and also by means of a composition distributing-roll 261 and a metal intermediate roll 262. The rolls 258, 261 are at each end, carried by plates 260, 260<a>, Figs. 3 and 8, pivoted on a stud 255 co-axial with the roll 262 and carried by an arm 248 pivotally mounted on an extension of the bearing of the cylinder 245. The plates 260, 260<a> can slide on their bearings 265 by means of screws 266 to adjust the rolls 258, 261 relatively to the roll 262. The rolls 258, 261 are adjustable relatively to the cylinder 245 by screws 269 carried by the arm 248 and engaging nuts 270 pivoted in the plates 260, 260<a>. Adjustment of the forme roll 258 relatively to the plate cylinder 172 is effected by a screw 254 carried by an extension 251 of the carriage 228 and engaging a nut 253 pivoted in the arm 248. The bearings of the riding roll 275, Fig. 3, are pivoted to the carriage 228 and are adjustable by screws 276 and nuts 278. The bearings of the intermediate roll 303 and of the forme roll 304 are pivoted to the carriage 228 by slotted lugs 280, Fig. 15, embracing fixed studs carrying blocks 281. Guides 285 integral with the bearings are slidable on the blocks 281 by screws 284 to adjust the position of these rolls relatively to the cylinder 245. Adjustment of the rolls 303, 304 relatively to the pick-up roll 302 and plate cylinder respectively is effected by screws 286. A spray catching roll 313 runs in contact with the roll 302. The bearings of all the rolls in contact with the cylinder 245 and also those of the roll 313 are constructed to allow the rolls to be moved out of contact with the cylinder 245 or roll 302 respectively and comprise an outer ring part 274 having a pivoted cap 263 and an inner rotatable bearing portion provided with a flange 293 having a notch which normally engages a stud 294 on the part 274. By raising the caps 263 and turning the inner bearings so that the unnotched periphery of the flanges 293 engage the studs 294, the rolls may be held in an inoperative position The metal fountain roll 301 is provided with an adjustable scraper 360 arranged beneath the level of the ink in the fountain 300, and is rotated continuously in the same direction as the pick-up roll 302 by a worm 329 on a shaft 324 which is driven by change speed gearing so that the speed of the fountain roll may be varied to regulate the supply of ink to the pick-up roll 302. A gear-wheel on the shaft of the distributing-cylinder 245 is driven by a gear on the plate-cylinder shaft through an intermediate gear and drives the pick-up roll shaft through an intermediate gear fixed to a shaft 316, to which is also fixed a gear-wheel 317 and a worm 318 which drives the changespeed mechanism of the fountain roll. This mechanism is shown in Fig. 16. The worm 318 gears with a worm-wheel 321 loose on a shaft 320, to which are fixed gear-wheels 322, 331 meshing with gears 323, 330 which are loose on the shaft 324 but can be clutched to it by means of a double clutch 326 operated by a handle 328, Fig. 3. A second worm-wheel 332 loose on the shaft 320 engages a worm 333 on a shaft 334 driven by a gear 335 meshing with gear 317. The worms are of different pitch and either of the worm-wheels 321, 332 can be clutched to the shaft 320 by a double clutch 325 operated by a handle 327, the four relative positions of the clutches 325, 326 corresponding to four different speeds of the shaft 324. The worm 333 also drives a worm-wheel 336 on a shaft 337, Fig. 3, to which is secured a disk 338. Eccentric pins 297 on the disk 338 and worm-wheel 336 oscillate an arm 340 and disk 349 secured to shafts 342, 347. These shafts each carry a pair of arms 344, 348 provided with rollers 350 engaging grooved collars fixed on the shafts of the rolls 261, 275, 303, 313 so that these rolls are reciprocated longitudinally. These devices are timed so that the rolls 303, 313 reverse their motions at a different instant from that of the rolls 261, 275. The bearings of the pick-up roll 302 are loosely mounted in the carriage 228 to allow obstructions to pass freelv between the rolls 302, 303, and are supported by the heads of screws to allow adjustment of the roll relatively to the fountain roll. The rolls 302, 301 are provided with axial borings, and means are provided for circulating heating or cooling fluid through these borings.