Patent GB-191102640-A (GB)
Title: Improvements in or relating to Printing Machines.
Inventor: KNECHT BENNO
IPC: B41L19/00
Filed: 1911-02-01
Granted: 1911-06-08
Abstract: 2640. Knecht, B. Feb. 14, 1910, [Convention date]. Addressi,n,g - machines; cylinder machines; printing - surfaces. - A machine in which a travelling cylinder prints letters in imitation of typewritten work is adapted to print also the heads of letters &c. by means of type frames which are automatically fed by a chain from a magazine at each movement of the roller and are raised to printing position by a vertically reciprocating plunger. Letters are printed during the forward and backward motions of the impression roller. The type is supported on a bed 2 over which passes ink-ribbon which is stretched between rollers 12, one of which is automatically wound at each reciprocation of a carriage 4, in which is mounted the impression roller 3, by means of an adjustable stop 8 on the carriage and a pawl 10 and ratchet 11. The carriage 4 is guided by tracks 14, Figs. 1 and 5, engaging projections 13 on the carriage, and the impression roller 3 mounted in screwadjusted bearings 6 is fitted with bearers 15 which move over a spring-raised track 16. The bed 2 is formed with an opening 22 through which a frame 81 carried by chains 19 is raised to printing position by means of a plunger 25, which is raised at the desired time by means of rollers 27 on the plunger, which are raised by inclined surfaces 31 on a slide 29 guided by a track 30 and connected to the carriage by means of spring-pressed pins 34 engaging sockets 36 on the slide. Horizontal surfaces 33 support the plunger 25 at the correct height while the roller moves over the printing-frame 81, and as the slide moves away from the plunger an inclined surface 32 engages a central roller 28 on the plunger to depress it to normal position. The carriage 4 is driven by means of sprocket chains 60 driven by a bevel and worm gearing from a motor shaft 49, a clutch operated by a lever 65 determining the direction of motion of the carriage. A pin 70 on the carriage acts on projections on the lever 65 to stop the carriage at the end of its travel in either direction, and a handle 66 is used to throw the clutch in again. The frames 81 in which the type is set up are constructed with slotted parts to receive the types, which may project right through the frames and are held in place by turned - up flanges 84 and by rods 86 which pass through holes in the type and through sockets 85 on the frames and are formed with bent parts 87, which rest against stops 88 to hold them in position. The frames have lateral flanges 23 which fit in recesses 96 in the chains 19. These chains are passed over wheels 18, 17 and are moved forward intermittently by a ratchet 71 and a pawl 74 on a freely-mounted wheel 73 which is rotated partially by a projection 77 on the slide 29 when it engages a stop 78 on a rod 75, or a stop 78 on a rod 76, a spring 80 maintaining the rods 75, 76 in a normal position. The frames 81 are delivered singly from a hopper 82 by the rotation of pins 91 formed with recesses 92 in which the bottom frame is normally supported. Pins 90 on the wheels 17 act on rollers 95 on arms 94 secured to the pins 90 and rotate the pins so as to deliver the bottom frame of the pile, the adjacent frame being prevented from falling by the unrecessed parts of the pins 90. If desired, the slide 29 can be disconnected from the carriage 2 by withdrawing the pins 34 and holding them in this position by rotating them so that lugs 45 on them are held against lugs 39. The matter in frames 81 is not printed in this case. If it is desired to print several letters with the same heading, the slide 29 is disconnected when the frame 81 has been raised to printing position by the plunger 25. The frames 81 fall off the belt 19 when this has passed over the wheel 18.