Patent GB-334325-A (GB)
Title: Improvements in machines for printing, embossing or impressing materials
Filed: 1929-07-10
Abstract: 334,325. Toy, A. W., and Underwood, F. B. July 10, 1929. Platen machines; postmarking and like machines; embossing-machines. - Relates to machines for printing or embossing material such as paper or card, and particularly for use in impressing the values of the various stamps on National Health Insurance cards, and of the type comprising a movable die adapted to be given a swinging movement to contact with the inking- device, and then a linear movement to effect the impression. According to the invention, mechanism is provided for imparting to the die first a swinging movement during which contact is made with the inking-device, then a linear movement for impression, and finally a swinging movement into the original position without contact with the inking-device; preferably the return movement is along a different path from that followed when moving to impressing-position. The die 15, Fig. 3, is carried by one arm 14 of a bell crank lever pivoted on a pin 18 between a pair of levers 12 which are pivoted on a pin 11 carried by a pair of spaced plates 1, 2, Fig. 1, mounted on the base 3 of the machine. The other arm 16 of the die-carrier is slotted to embrace a vertical plate 20 formed with a slot 22 engaged by a pin on the arm 16. The levers 12 are provided with a roller 48 normally lying in a recess in a cam 43 but adapted to be depressed by the cam on rotation of a crank 5 connected by gears to the shaft 4 carrying the cam. In normal position, the pin 23 rests on the horizontal part of the slot 22, and when the levers 12 are depressed, the movement of the pivot 18 causes the die to rock past an inking-roller 29 into vertical position. The pin 23 has then reached the vertical part of the slot 22, and further movement of the levers 12 depresses the die into marking-position. In the return movement under the action of a spring 49 the die carrier arm 14 remains vertical until the pin 23 has returned to the top of the vertical part of the slot 22, when it is constrained to move along the top face of the horizontal part of the slot and swing the die towards its inoperative position through a path that avoids contact with the roller 29. Towards the end of their movement, the levers 12 engage a pin 25 on a balanced lever 24 to cause the other end of the lever to engage the pin 23 and return it to the bottom of the horizontal part of the slot ready for the next operation of the machine. The movements of the lever 14, 16 about the pivot 18 are restrained by spring washers. Preferably two or more dies are carried in the casing, and means for selecting the die to be used is provided. A sleeve 41 carrying the cam 43 in each part of the apparatus is provided with a slotted flange 42 adapted to be engaged by a key 45 slidable in a slot in the shaft 4 and connected to a slidable collar 46 adjustable to the required position by a handle 47 outside the casing. The casing consists of a number of plates bolted together and connected to the baseplate 3 by bolts sealed to prevent unauthorized removal. Inking-apparatus .- The inking-roller 29 runs in contact with a roller 27, Fig. 3, which contacts with another roller 34 to which ink can be applied by the operator through an aperture in the rear wall of the casing covered by a door 38. The roller 34 is carried by pivoted arms 35 and is adjusted in position by a screw 37. The roller 29 is carried by levers 28 pivoted on the shaft 26 of the roller 27 and is resiliently held in position by a spring 32, adjustment being effected by a screw and nut 31, 33. A drip-pan 40 may be carried by the levers 28. The rollers are rotated frictionally when the die passes over the roller 29 during its movement to marking position. The shaft 26 on which the rollers 27 of all the devices are carried is extended outside the casing walls and provided with a handle 39 for the purpose of distributing the ink evenly. According to the Provisional Specification, the roller 29 is mounted on a fixed axis and the roller 27 on an axis supported by pivoted levers. Stopping-arrangements.-The machine is provided with means for stopping actuation after each revolution of the shaft 4, Fig. 1. The handle 5 is arranged to rotate twice for each revolution of the shaft 4 and is provided with a pin 55 adapted to engage at the end of each second rotation with a stop-pin 52 in the casing. The pin 52 is normally held by a spring in inoperative position, but is adapted to be projected by an arm 57 carried by a rock shaft 99, Fig. 1, under the influence of a cam on the shaft 4. To start the rotation of the handle, it is pulled away from the casing against the action of a spring. Means is also provided for stopping the operation of the machine after a predetermined number of operations. Mounted in a U-shaped frame 65 are three spindles 66 - - 68 geared together in the ratio 10 :1 and corresponding respectively to units, tens, and hundreds. The spindles are adapted to be set independently by a key inserted through an aperture 95, Fig. 6, in the cover. The spindles each carry a notched disc 70, Fig. 8, adapted to be engaged when all the discs are in zero position by projections 73, from a spring-pressed pivoted frame 72 having an extension which is moved bv the movement of the frame into the path of a boss 74 extending from the sleeve 41. The spindles are actuated by a radial projection on the shaft 4 engaging a toothed wheel on the shaft of the spindle 66 to rotate it one-tenth of a revolution at each revolution of the shaft. The apertures 95 are each provided with a sliding cover plate 96, Fig. 6, formed with a lug 97 adapted to register in closed position with lugs 98 on the casing for sealing-purposes. According to the Provisional Specification, the spindle 67 is driven by the spindle 66 and drives the spindle 68, the driving-spindle in each case being provided with a one-toothed wheel adapted to rotate the driven spindle one-tenth of a revolution at each actuation. Counting-apparatus. - Counting-apparatus 75, Fig. 3, of known construction is provided and is operated by a link 76 from the levers 12, glasscovered viewing-apertures being provided in the casing.