Patent GB-343166-A (GB)
Title: Printing machines
IPC: B41L47/46
Filed: 1929-11-15
Abstract: 343,166. Printing-machines. BABER CO., 110, State Street, Boston, U.S.A.- (Assignees of Baber, J. L.; Newark, New Jersey, U.S.A.) Nov. 15, 1929, No. 35030. Convention date, Nov. 15, 1928. [Classes 100 (i) and 100 (ii).] Feeding webs ; cutting-apparatus ; cylinder machines addressing and like machines: tripping- arrangements.-In printing. machines of the kind provided with a fixed printing unit and movable printing units adapted to be brought successively into printing position adjacent the fixed unit for printing on a web which is subsequently cut up, means is also provided for automatically feeding varying lengths of web according to the length of the fixed and movable unit then in position. The fixed unit 11, Figs. 2 and 6, is carried on a bed 12, and the movable units 13, Fig. 4, are slidable on rails 15 arranged transversely of the machine. The movable unit in printing position and the succeeding one are adapted to be engaged by hooks 24 pivoted to a carriage, the side-bars 16 of which slide in grooves in the rails 15. The carriage is reciprocated by a pivoted lever 17 having a pin-andslot connection with a crank disc 23 on a shaft 8 driven from the main shaft 2. The hooks 24 can be rendered inoperative by a slidable cam bar 26 connected by pivoted links 28 to the rails 15. Abutments, such as the last line of type, in the movable units 13 engage a spring-pressed lever 73, Fig. 6, having a toothed segment 72 engaging a gear wheel 71 adapted to move a rack 66 controlling the movement of a shield 61 over the teeth of a ratchet wheel 59. The wheel 59 is rotated by a pawl 58 on an arm 57 connected to a gear wheel 55 loose on the shaft 42 of the ratchet wheel and actuated b y a toothed segment 54 which is carried by a rockshaft 52 under the control of a link 47 and lever 49, Fig. 2, having a pin-and-slot connection with a crank disc 86 on the main shaft 2. The shaft 42 of the ratchet wheel carries two flanged discs 41 against which the web 14 from a reel 37 is pressed by spring-pressed rollers 43, 44. The pawl 58 is provided with a roller 63 adapted to ride over the shield 61 and lift the pawl out of engagement with the ratchet wheel, so that the ratchet wheel and discs 41 are rotated to feed sufficient of the web for printing on the fixed unit and the :novable unit set in position. An ink ribbon 32 is :'ed between the printing units and the web from a teel 33 to a reel 36, the feeding mechanism being of known type and actuated from the cutting mechanism. The impression mechanism consists of a carriage 76 running on rails 81 and supporting a roller 87 carried by pivoted arms 88 under the control of toggle mechanism 90, 91 and a spring 93<x>. At the end of the operative stroke, the toggle is broken by a pin 93 so that during the subsequent movement the impression roller is raised from the printing units, the roller 87 being depressed at the end of the inoperative stroke of the carriage 76 by a pin 94 engaging the toggle. The carriage is reciprocated by the lever 49. The printed web is fed under a fixed knife 95, Fig. 9, and is severed by a vertically reciprocating knife 97 actuated by a crank pin on the shaft 8 and a cam 102 on the lower end of the knife. The cut sheets are directed by an inclined table 106 to a receptacle 105.