Patent GB-189911397-A (GB)
Title: Improvements in Printing Presses.
Inventor: JOHNSON JAMES YATE
Filed: 1899-06-01
Granted: 1899-09-02
Abstract: 11,397. Johnson, J. Y., [Aluminium Plate and Press Co.]. June 1. Lithographic and like printing; rotary machines.-Relates to rotary printing presses, more particularly for surface printing with aluminium plates. Figs. 1 and 2 together show a complete side elevation of the machine. The forme cylinder 5, Fig. 1, has clamps for securing the printing-plate on a portion of its surface, another portion of its surface serving as an ink-distributing table. The axle of the cylinder 5 carries a sliding clutch member 10 operated by a lever 18 to engage a clutch member on the hub of a gear-wheel 11 driven from the driving-shaft 13. By operating the lever 18 to disengage the clutch, the cylinder 5 may be stopped while the inking &c. mechanisms continue to run. The cylinder 5 is geared to the impression cylinder 20. The printing-plate or forme is inked by rollers 92 mounted in adjustable bearing - brackets on verticallymovable frames or brackets 85. There is a frame 85 at each side of the machine. Journalled in arms of the frames 85 are distributing-rollers 90 having endways movement. These rollers 90 are geared by intermediate pinions 152 to a gear-wheel rotating with the wheel 11. The frames 85 are moved vertically to lift the inking- rollers away from the cylinder 5, or to lower them into operative position, by a pair of sliding cam bars &c. operated by a toggle from a cam on the end of the cylinder 5. The cam operates an arm on which is pivoted a link having a doubleshouldered slot which operates the toggle. The link is connected by a rod 141 and springs &c. to a controlling-lever 144. The intermediate pinions 152 are carried by a bracket 150 pivoted on the cylinder bearings, and this bracket is automatically moved on its pivot when the frames 85 are lifted or lowered, so as to maintain the pinions 152 always in gear with the distributing-rollers 90 and with their driving-wheel. The rollers 90 are reciprocated longitudinally by rack arms operated by cams. Running in contact with one of the rollers 90 and with an ink drum 40 is a transfer roller 103 in arms 100 pivoted to the framing. In the arms 100 is also a rider roller 102. Running in contact with another of the rollers 9) and with the drum 40 is a transfer roller 107 in pivoted arms 105. Running on the drum 40 are a number of distributing- rollers 62, 63, &c., and on these run rider rollers 62<a>, 63<a>, &c. The drum 40 is reciprocated longitudinally, and two of the riders 63 are reciprocated longitudinally in opposite directions to the drum. The shaft 41 of the drum 40 is driven by the wheels 42, 43 from the gear-wheel 11, and on the wheel 42 is a wheel which drives the wheel 38 on a shaft 39. On the wheel 38 is a cam-groove for rocking a shaft 32 having arms carrying a roller by which ink is conveyed from the fountain roller to the drum 40. The fountain roller runs in the ink fountain, and is rotated by a ratchet and pawl, the pawl arm of which is on a short shaft 48 having an arm 49 on which is a pin engaged by a slot 50 in a link 51 connected to a crank-pin on the wheel 38. A pin 53 may be passed through any one of a series of holes to regulate the throw of the pawl arm. A hand-lever 54 is formed as part of the arm 49. The printing-plate is damped by damping-rollers 210, 216 mounted adjustably in pivoted arms connected to toggles operated by arms on a shaft 223, so as to lift the rollers as the inkdistributing surface passes under them. The shaft 223 is rocked by an arm 225 having a stud normally engaging a side notch of a slot 227 in a link 228 connected to an arm operated by a cam. The stud may be thrown out of the side notch, so that it works in the slot 227 and the arm 225 is consequently not operated, by a cam arm on a shaft 237, which cam arm engages the projecting end of the link 228. The shaft 237 may be operated by a lever 245 or by a foot-lever 248, Fig. 2, connected by a rod 247 to an arm of the shaft 237. When the shaft 237 is operated, it rocks a shaft 240 by means of the toothed segments 238, 239, and a cam arm thereon lifts the arm 225 to lift the damping-rollers 210. 216 when the link 228 is inoperative. The damping-rollers 210, 216 are in contact with a water-distributing drum on a shaft 186<a> driven by the gears 187, 188 from the ink-distributing roller driving-gear. The drum is also moved endways. Water is transferred to the drum from a fountain roller in the water fountain 175, by a vibrator in arms of a shaft operated by an arm 198 and cam 200 on the shaft 177<a> of the fountain roller. The arm 198 is adjustable by a screw 201<a> &c. The shaft 177<a> is geared to a vertical shaft driven through a clutch from the inking-mechanism. The impression cylinder 20 has its axles 23 journalled in eccentric bushes or bearings 24 having arms 260 connected by links 262 to arms 264 on a rock shaft 265. The links 262 are adjustable in length by screws 262<a>. On the shaft 265 is an arm 266 having a pin 267 engaging a double slotted link 268 pivoted at 269 to an arm 270 pivoted at 271 and oscillated by a grooved cam 274. The arms 264 and links 262 constitute toggles which, when straightened, as shown in Fig. 1, place the cylinder 20 in operative relation to the forme cylinder 5. The link 268 is normally held in position to straighten the toggles by a spring-pressed arm on a shaft 275, and is moved into position to break the toggles, and move the cylinder 20 into inoperative position, by rocking the shaft 275, which permits the link 268 to move to the left under the influence of a spring. On the shaft 275 is an arm 285 connected to an arm 286 pivoted at 287 and operated by a foot-rod 291 projecting through the platform 252. On the arm or rod 291 is a shoulder 291<a> which engages under the platform 252 to hold the rod in depressed position. The arm 285 may also be operated by a foot-rod 301 which at the same time stops the machine. The rod 301 has a projection engaging a pin on the arm 285, and has also at its lower end a slot and pin connection with an arm of a shaft 305 having an arm carrying a brake shoe 307, which is applied to the flywheel 308 on the driving-shaft 13. The shaft 305 is geared by toothed segments 313 to a shaft 310 having a beltshipping arm 311 for moving the belt from the fast to the loose pulley. The belt shipper and brake may be operated alone, by a lever 315 fixed to the shaft 310. The controlling arms and levers are in convenient position for the operator, who stands on the platform 252 to feed the sheets to the feed-table 26. The printed sheets are delivered by a gripper cylinder 325 and tapes 329 to a fly 335 which deposits them on the table 355. The fly 335 is pivoted at 336, and is operated by a pinion 338 and a rack 339 reciprocated in one direction by a cam &c. and in the other by a spring. The fly may be held in the raised position, inoperative, by a pivoted hook 349. An arm on the shaft of the fly operates the counter 353 through a chain 354 as usual. The sheet of paper, when fed to the front gauges E, is supported across the gripper gap in the cylinder 20 by strips which bridge the gap. The strips are fixed adjustably on a shaft in the gap. The blades of the gauges E may be recessed, for the bridge strips to run in the recesses, and the part of the cylinder not making the impression may have shallow grooves in which the lower edges of the gauges run. This prevents the edge of the sheet from passing under the gauges. The gauges E are fixed on their pivot shaft by set-screws, and the gauges are lifted by a cam &c., their downward movement being limited by an adjustable stop arm. A modified damping-apparatus is described in which the water fountain roller is geared to a vertical shaft geared to the shaft 39. The transferring-roller, which carries the water from the fountain roller to the distributing-roller, is carried in arms on a rock shaft operated by an adjustable cam running loosely on the shaft of the fountain roller and driven therefrom by differential gears at a slightly-different speed from that of the water roller. The forme cylinder 5 and impression cylinder are geared together by gear-wheels at both ends of the cylinders. The gears on the ends of the cylinder 20 are fixed, and those on the forme cylinder 5 are adjustable angularly by screws and curved slots. The adjustable gears are so adjusted, relatively to those on the cylinder 20 and to each other, as to take up all back-lash or loose movement.