Patent GB-752210-A (GB)
Title: Improvements in or relating to photographic type composing machines
IPC: B65G57/30
Filed: 1954-12-22
Abstract: 752,210. Photographic type - composing. MERGENTHALER LINOTYPE CO. Dec. 22, 1954 [June 10, 1954], No. 37046/54. Class 98(1). A photographic type-composing machine includes a film magazine and reciprocating means for perforating the film in a predetermined relationship to each line of the photographically recorded text matter, means for actuating the perforating means and film advance means for actuating the perforating means while in film piercing position, so as to move the film longitudinally to bring an unexposed portion thereof into photographing position. As shown, a film strip 10 is fed from a roll 11 in a light-proof enclosure (not shown) over an idler roller 12, and past a slot 13 in the front cover 14 of the enclosure to a cassette (not shown) above the enclosure. A sliding shutter 15 closes the slot 13 except when held open by a solenoid 16 during composition of a line, at which time the film is held against a vacuum frame 17. A pair of punches 21, slidably supported in a frame member 22, enter in forward position a pair of dies 24 in front of film 10. The dies are carried by arms 25, 26, arm 26 being keyed to a hollow shaft 27. A bell-crank 30, separated from arm 26 by a spacer 31, is also keyed to shaft 27. After composition of a line, a clutch 57 is energized so that a shaft 52 is driven by a motor 53. Shaft 52 is connected by a chain-and-sprocket drive to mutilated gear 47 which first drives a shaft 44 connected by a clutch 42, 43 to a shaft 40 passing through hollow shaft 27 and carrying eccentrics 45 which engage the punches 21 and push them through film 10 into engagement with the dies 24. At this stage the drive to shaft 44 ceases owing to the interruption in the teeth of gear 47. A cam 63 on shaft 52 then raises a pivoted lever 61 to actuate a valve to cut off the vacuum supplied by a suction pipe 70. When the film has thus been released, a cam 37 on shaft 52 operates to allow a pivoted lever 32 to rock under action of spring 36, in turn allowing the bell-crank 30 to rock under action of spring 34. This rocks arm 26 through shaft 27, and also arm 25, which is connected to arm 26 by a frame 22, through which the punches pass, and which carries the punches 21 and the film 10 upward. After the film has been advanced, vacuum is applied to frame 17 to hold it in place. The drive to shaft 44 is re-established so that the punches are withdrawn from the film, bell-crank 30 and its associated parts return to their initial positions, and clutch 57 is disengaged, ready for a further cycle of operations. The film shift may be varied by a variable stop mechanism located in the path of a projection 80 on the bell-crank 30. This mechanism, as shown in Fig. 5, has a plate 82 carrying stop-screws 83 mounted on a shaft 84. The shaft is rotatable by a knob 85 marked in point sizes into a number of positions in which plate 82 is held by a spring-urged ball 87 engaging recesses in the plate, and in which the appropriate stop-screw is brought into position to limit the shift to the amount appropriate to the point size of the recorded type. Shaft 84 slides in-a hollow shaft 91, which is threaded in a part 93 attached to the frame of the machine and carries a drum 94 which has recesses engaged by a spring-pressed ball 95. A spring 90 presses plate 82 against the end of shaft 91. When shaft 91 is turned by a dial 92 thereon, the position of plate 82 varies, allowing an additional variation of film shift in accordance with the leading required between the lines. One end of a pivoted pointer (not shown) is spring- urged against the upper surface of dial 92; the other end of the pointer indicates the amount of leading on a scale. Vacuum to frame 17 is supplied through a pipe T2 with a pivot joint 73, which allows the magazine to pivot out of the machine frame for loading, when the clutch 42, 43 is disengaged. Shaft 40 can then be turned by hand by means of knob 41.