Patent GB-190825168-A (GB)
Title: Improvements in or relating to Printing Machines.
Inventor: BOULT ALFRED JULIUS
Filed: 1908-11-23
Granted: 1909-08-19
Abstract: 25,168. Boult, A. J., [International Multigraph Co.]. Nov. 23. Printing in imitation of type - written matter ; printing-surfaces.-In a machine for printing in imitation of typewritten matter one end of the inking-ribbon is attached to, and moves with, the reciprocating or oscillating type-bed, the other end of the ribbon being carried by a spring-barrel supported independently of the type-bed. The invention is described as applied to a machine having a segmental type-bed formed with a rigid detachable member adapted to carry lines of individual type in rails, and having a special quick-return hand drive. The individual type are carried by rails 21, Fig. 4, on a rigid segmental member 20, which is rigidly and detachably secured by bolts 27, Fig. 5, to the segmental end plates 16. The ink ribbon 70 is mounted at one end on a spool surrounding and frictionally engaging a spring barrel 71 carried by the frame of the instrument, and at the other end passes over a spool 81 the end of which frictionally engages a short shaft 82, mounted in a lug 83, and carrying a ratchet-wheel 84 intermittently rotated by a pawl 85 on an arm 65 so as to feed the ribbon a small amount during each oscillation of the type bed. The outer end of the arm 65 is forked and engages a pin 58 on the arm 50 referred to later. The paper sheets rest on the table 90 between adjustable guides 91 and are fed by hand over the guide plate 92 to the spring-pressed feed-roller 94 and underrunning platen 40. The type-bed is given a slow printing movement with a quick return by means of a radial slot 30 in an end frame 16, the slot engaging with a roller 32 on a handactuated crank 33. The rotary platen 40 is positively driven by a pinion 48, Fig. 2, gearing with teeth 49 on the printing-member. The shaft of the platen has reduced eccentrically-placed extensions, which pass through the side walls of the machine. At the left-hand end, the extension is mounted eccentrically in an adjustable bushing, by which the parallelism of the platen and the printing-member can be established. The right-hand end of the shaft 41 is rigidly connected to a slotted plate 51, Fig. 2, which can be adjustably clamped to an arm 50 mounted loosely on the shaft. The adjustment is such that, when the arm is vertical as shown in Fig. 2, the platen is held in position to co-act with the type, the arm 50 being retained in this position by a spring-pressed dog 55. This position is maintained during the rearward printing movement of the printing-surface, but at the end of this movement a cam 60 trips the dog 55, whereupon the shaft 41 is turned rearward by a spring on its left-hand end until the arm 50 engages a stop 59. The platen is thus swung downwards so that the type may return without impressing the platen. As such return is just being completed, the arm 65 engages the pin 58 and returns the arm 50 to its vertical position, at the same time feeding the ink ribbon as previously explained. An ink roller 97, Fig. 4, may be used in addition to the ribbon 70.