Patent GB-117818-A (GB)
Title: Apparatus for the Copying of Type or Handwritten Matter, Drawings, Music and the like.
Inventor: HAMBURGER FELIX
IPC: B41F3/30
Filed: 1918-07-26
Abstract: 117,818. Hamburger, F. July 26, 1918. Copying documents, drawings, and the like; printing-processes; bed-reciprocating apparatus; damping-apparatus for lithographic machines; inking-apparatus; cylinder machines; tripping- arrangements.-In apparatus for copying typewritten or hand-written matter, drawings, music, &c. of the kind in which a carriage, carrying a plate bearing a negative of the original, is reciprocated past an impression cylinder, provided with segmental guide plates for the paper, the movements of the carriage are utilized for inking the negative, feeding the paper to the cylinder, raising and lowering the cylinder, guiding the paper between the cylinder and the guide plates, and delivering the paper. Figs. 1 and 2 show the machine in elevation, Fig. 2 being a continuation to the left of Fig. 1. The printing-plate 23 is secured to the carriage 22 which is reciprocated by means of a pin 4 carried by an endless chain 15 and engaging a slot 16 between arms 21 on the carriage. The chain 15 is driven from the main shaft 1 by a chain and sprocket wheels 17, 18. The plate 23 is inked by a roller 54 driven by a rack on the carriage 22 and supplied with ink from a roller 56 by transmission rollers 55. The roller 56 is reciprocated longitudinally by means of a pin 61, carried by a rotating bevel wheel 60<a>, engaging a slot in a lever 62 which is pivoted at 63 to the machine frame and carries the roller 56. The wheel 60<a> is driven by a bevel wheel 60 and chain 58 from the shaft of the inking roller 54. The shaft 5 of the impression cylinder 29 is carried by a frame 67 mounted on pivots 13 and adapted to be raised when the design is completely impressed on the sheet, by means of an adjustable member 65 on the carriage 22 engaging a roller 66 on the frame 67. The frame is held in its raised position after the passage of the member 65 by the engagement with the roller 66 of the upper surface of a pivoted strut 68 which is turned into operative position by a spring 72. The strut is returned to inoperative position at the end of the return stroke of the carriage 22 by the engagement of a member 70 on the carriage with a member 71 on the strut. The cylinder 29 is driven from the main shaft 1 by a chain 27. The sheets are held in contact with the cylinder 29 by means of guide-rolls 46, 47, 48, 49 engaging through slits in guide-plates 45. The sheets to be printed are laid singly on a feed table 31 and are pushed by adjustable pushers 30 between the cylinder 29 and the roller 49. The pushers are actuated by an open-ended cam slot 38 in a plate 37 on the carriage 22, the cam slot engaging a pin 36 on a rod 35 which is connected at one end to an arm 34 pivoted to the machine frame and at the other end by an arm 33 to a lever 32 linked to the pushers 30. To ensure the leading end of the sheet entering between the guide 45 and the cylinder 29 after passing the printing position, a finger 41 is provide near the front of the carriage 22, the finger being carried by levers 40, 42 pivoted to the carriage, the roller 42 being provided with a roller 43 adapted to engage a spring guide 44 so that the finger is raised and presses the paper into close contact with the cylinder 29. The printed sheets are stripped from the cylinder and conducted to delivery tapes 50 by an oscillating stripper 74 carried by a bell-crank 75 which is connected by a link 76 to a second bell-crank 77. The bell-crank 77 is connected by a link 79 to one arm of a lever 80, the opposite end of which carries a rod 82 provided with a roller 83 adapted to be engaged by an open ended cam slot (not shown) in a member secured to the carriage 22 so that the stripper 74 is depressed at the proper time to deliver the sheet. A pawl 85 holds the rod 82 depressed until the carriage makes its return stroke. The tapes 50 are driven from the main shaft 1 by a chain 52. The printing-plate 23 is kept damp by a damping-roller 73 comprising a perforated hollow cylinder surrounded by a spiral which is covered with a spongy material provided with outer layers of felt. The pressure of the roller on the printing-plate is regulated by a weight 87. The Specification as open to inspection under Sect. 91 (3) (a) states that the printing plate is prepared by writing the original in a special ink on an oiled sheet and taking a negative of the original on a glass or marble plate. This subject-matter does not appear in the Specification as accepted.