Patent GB-191006873-A (GB)
Title: Improvements in and relating to Die Stamping Presses.
Inventor: SAVORY ERNEST WYMAN
IPC: B21D28/00
Filed: 1910-03-18
Granted: 1911-01-12
Abstract: 6873. Savory, E. W., and Battey, A. F. March 18. Embossing and stamping ; inking- apparatus ; tripping-arrangements.- A die stamping- press of the type wherein the power is applied suddenly by a spring-pressed arm controlled and released by a stepped cam is provided with (1) a lever arm e on the screw which is coupled to the spring-pressed arm f by a link g adapted to transmit a thrust and pull; (2) means for absorbing the rebound and tripping the mechanism, consisting respectively of a one-way clutch 56, 57 between the lever f and the frame of the machine, and a pawl 63 adapted to be moved by a weighted lever 60 under the control of a hand-lever 67; (3) means for imparting motion to the inking - table a n d die - holder, whereby the table is beneath the brush for a longer period than the dieholder ; and (4) an intermittent wiping-device in which the wiping-web is travelled in a contrary direction to the travel of the die. (1) The spring o is mounted in a box j, and acts upon the piston head n of a rod m connected to the lever f. The tension of the spring may be adjusted by a handwheel k and a screwed rod h connected to the box and passing through the frame of the machine. The lever f is provided with a roller r engaging the operating-cam p. (2) To absorb the rebound and prevent a rebound blow from being struck, a rod 55 is pivoted to the lever f. This rod is provided with teeth 56 and a shoulder 62, and with side pins 61, 61<a> which engage the arm 58 of the pawl 57 and alternately raise and depress it. The pawl 57 is provided with flats 59 engaged by a spring-pressed plunger 60 for holding it in one of two positions. Thus, as the spring o is gradually compressed, the rod 55 is moved outwards until the pin 61 engages the arm 58 and lifts the pawl out of action. The striking-blow follows, and the pin 61<a> engages the arm 58 and knocks the pawl into action ready to absorb the rebound. A weighted lever 68 is connected to the pawl 63 by a slotted link 65, and when the link 65 is lowered by the operation of the hand-lever 67, the pawl 63 drops behind the shoulder 62 and prevents the blow from being struck. (3) The die-holder s and inking-table 2 slide in grooves in the frame b, and are reciprocated at different speeds from a cam t through bell-crank levers u, v and links w, x, and through the bell-crank lever u and links w, 4, bell-crank lever 5, and link 6 respectively. Instead of moving the inking-table to the brush, the latter may be moved to the inking-table. The ink-table 2 is mounted on springs 7 so as to be adjustable in height. The inking-brush 8 is mounted on a spindle 9 in an eccentric bush 10, and is held against rotation by links 13, 14. The bush 10 is driven by a gear-wheel 12 and chain-wheels 18, 19, 20, 21, and is carried by a bracket 11 which is adjustable in height by means of a hand-wheel and screw 15. (4) The wiping-web 25 passes around the wiping-rollers 23, 24, guide-rollers 27, 28, and the take-up roller 26, which is mounted on a weighted arm 29 pivoted at 30. The wiping-rollers are adapted to be raised or lowered by a friction roller 32 engaging a cam 33 on the wheel 34, which roller operates levers 35, 36, 37, bell-crank lever 38, connecting-link 39, and lever 40. The levers 38, 40 depress the bearings 41 of the wiping-rollers against the action of springs 42. The web 25 is caused to travel by means of a cam 44, levers 45, 46, rods 48, 49, and pawls 50, 51 operating ratchetwheels on the wiping-rollers.