Patent GB-190214043-A (GB)
Title: Improvements in Presses for Printing or Embossing.
Inventor: JOHNSTON JOSEPH YARDLEY
Filed: 1902-06-20
Granted: 1903-09-19
Abstract: 14,043. Johnson, J. Y. June 20. Embossing.-Relates to a press for printing or embossing paper &c. from intaglio dies charged with ink &c. The main driving-shaft F is connected with the drum H by means of an expanding- clutch, so as to start and stop without shock or jar. The main operating-shaft R is connected with the shaft F by worm gearing U. The die-carrying arm X, Fig. 4, is attached by a divided socket X<1> to a sleeve V, which surrounds the shaft R for part of its length. The sleeve V is driven from the shaft R by gearing Z, a, c and the broken wheel d, the sleeve V also having an arm g which engages with a cam-disc e, such as described in Specification No. 25,297, A.D. 1901, on the shaft b, for the purpose of stopping the die carrier in the operating position and for gradually stopping and starting it. The die holder n, Fig. 4, has a circular shank o, and has guide-arms q surrounded by springs r so as to have an amount of vertical play in the arm X. The die is held in position by means of bevel edges and clamps, the counter-die being fixed on its table by geometric clamps. The die holder has a hard steel striking-cap t, and is depressed by a collar and wedge 105 as it passes over the inking and wiping mechanism. The wedge 105 is depressed by a wedge 106, Figs. 4 and 7, which is mounted on a double lever 108 provided with rollers placed in different planes, so as to be moved by cams on the edge of the disc 109 supported by brackets 110 from the framework. The cams are arranged in pairs 111, 112 and 114, 115, of which 111, 114 lower and 112, 115 raise the die holder in the required positions. The cams 111, 114 are pivoted so as to prevent the depression of the die holder when required, and the cams 112, 115 are adjustable. The inking-roller 22 is mounted over an adjustable inking-trough, and is driven by chain gearing 37 from the shaft F. The wiping-table is provided with adjusting-screws for all positions, and is covered with a stretched blanket. The wiping-paper is fed from a roll 67 mounted on fluted conical centres 69, the axis of which is braked and is either mounted in the frame or on a trolly 69', as shown. Floating pressure rollers are also employed. The paper passes over the rollers 55 on the edge of the table, and the waste ink is removed by a flexible blade 79 set obliquely in front of a pressure surface 75. The paper passes down on to a take-up roller 84, which is driven by supporting surface rollers 87, which receive intermittent motion by means of clutch gear driven from the oscillating toothed sector 93. The throw of the sector is regulated by means of a cam on the shaft R, which can be set to any degree between the concentric and extreme positions. The cam-ring 97 is connected by a link 98 with a crank 99 on the sector shaft 95. The die striker shaft 116, Fig. 4, has a triple square-thread screw, which works through a long nut in the frame head C, and terminates at the top in a forging 121, to which a flywheel 122 is secured. An extra flywheel 124 may be secured above the wheel 122. The shaft is turned, and raised, through 90‹ by means of levers 130, 131 set in different planes and 45‹ apart. These levers are operated by cams 133, 134 on the shaft R. The flywheel 122 is provided with brackets 147 and an inclined guide, which moves on a corresponding guide-bar, the guide being provided with a roller clutch to prevent the striker shaft from running back after the rebound. The driving-shaft is provided with a tripping-device to release the clutch for delivering the impression blow. This blow is delivered by means of two pistons mounted in the case 137 and connected to a high-pressure supply of air or steam by the pipes 145. The pistons are always connected to the high-pressure supply, so that the air &c. is driven back by raising the striking-shaft. The pistons are connected by ball-jointed rods to cranks on the striking-shaft, and are surrounded by compression spaces to give an elastic action. Safetyvalves are connected to the pipes 145, so as to regulate the pressure, and therewith the force, of the impression blow.