GB1333622A - Machine for coining type-wheels or rollers for office machines - Google Patents

Abstract

1333622 Rolling ING C OLIVETTI & C SpA 19 Jan 1971 [5 Feb 1970] 2624/71 Heading B3M Characters are coined on a wheel 8, Fig. 1, by reciprocating a planar die 27, mounted on a support 26, in a directiion perpendicular to the axis of the wheel. After clamping the wheel between spindles 6 and 7, a coining pressure is applied, via piston rod 32, Fig. 3, wheel 28 and support 26, between the die 27 and wheel 8 by the actuation of an hydraulic cylinder 31. The actuation of cylinder 31 also presses wheels 41, via tie rods 37, on to the spindles 6 and 7 to balance the coining pressure. The die 27 is then reciprocated by a double acting cylinder 17 which causes the wheel 8 to rotate due to a rack 10 on the support 26 engaging a pinion 11 on the spindle 6. In a second embodiment, Fig. 6, a movable slide 51 is moved away from a fixed slide 50 against the force of springs 91 by pressurizing a chamber 95 so that a piston 82 is moved to the left as seen in Fig. 6 and forces oil in a chamber 86 through hole 87 to a chamber 88. A roller is then raised between two coining tools 58 by an hydraulic support 105 and spindles 111, slidably mounted in boxes 113, are carried inwardly to engage the roller by displacing rod 119 to the position shown in Fig. 9. On releasing the pressure in chamber 95 so that the piston 80 returns to its initial position shown in Fig. 6, a coining pressure is applied between the tools 58 and the roller by the springs 91. A cam shaft 68 is then rotated to reciprocate the slides 50 and 51, a rocking lever 73 ensuring that as one slide moves up, the other moves down.