Patent GB-341448-A (GB)
Title: Improvements relating to printing machines, more particularly addressing machines
IPC: B41L47/46
Filed: 1929-10-11
Abstract: 341,448. Printing- machines. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.- (Selectograph Co.; 1061, West 35th Street, Chicago, U.S.A.) Oct. 11, 1929, No. 30906. [Classes 100 (i) and 100 (ii).] Addressing and like machines; stencil - printing apparatus ; tripping and throw - out arrangements.- A printing-machine comprises a guideway along which stencils can be fed, a hand-lever extending longitudinally of the guideway, and a lever situated adjacent to the hand-lever and adapted for shifting a transmission bar for selectively causing movement of the hand-lever to operate either the stencil feed mechanism or the impression mechanism or both, the shifting of the transmission bar causing projections thereon to be engaged with or disengaged from levers connected with the feed and impression mechanisms. As shown, stencils 13 stored in a magazine 15 are removed by a reciprocating pusher 14, which feeds them along a guideway 12 to printing position above a sheet-support 29, printing being effected by an impression roller 38 rolled over the stencil. The roller 38 is carried by arms 62 pivotally mounted on a shaft 64 by means of a bearing member 96, the pusher 14 is reciprocated by a rock arm 92 connected to an arm 91 fixed to a bearing member 89 mounted on the shaft 64, and the support 29 is raised to press the sheets against the stencil by mechanism actuated from an arm 90 fixed to a bearing member 88 mounted also on the shaft 64. The machine is actuated by a hand-lever 39 pivoted on the shaft 64 by means of a member 102 in which is slidably mounted a bar 40 adapted to be moved by a thumb-lever 105 on the lever 39 into three positions corresponding respectively to (1) skipping; (2) consecutive printing; (3) repeat printing. A spring finger 111 engaging notches in the bar 40 secures it in adjusted position, and lugs 95, 98, 99 are provided on the bar to engage notches 93, 94, 97 in the members 88, 89, 96 respectively. (1) The lug 95 engages the notch 94, and the other lugs are clear, the pusher 14 alone being actuated. (2) The lugs 98, 99 engage the notches 97, and the lug 95 engages both notches 93, 94, whereby the pusher 14, roller 38, and support 29 are all actuated. (3) The lugs 98, 99 engage the notches 97, and the lug 95 engages the notch 93 and is clear of the notch 94, so that the pusher 14 is idle and the roller 38 and support 29 are actuated. The shaft 64 is carried by a member 65, which is pivoted at 66 to the frame of the machine and is normally raised by a leaf spring 67 coiled around the pin 66 and fixed to a bar 63 connecting the arms 62: downward pressure on the lever 39 therefore lowers the roller 38 into operative position. During the impression stroke, a roller 70 on one of the arms rides between guide bars 71, 72, and, on the return stroke, it rides over the top of the bar 71 clear of the stencil, a spring returning the impression arms to normal position. The stencil in printing position is held against backward movement by wire springs 17, the central portions of which. are bent around lugs 20 and frictionally engage the stencil frame. Inking-apparatus.-Ink is supplied to the roller 38 by a transfer roller 77 mounted in arms 80 pivoted to the arms 62 and secured to cross-bars 81, 82, a spring 83 fixed to the members 63, 81 pressing the roller 77 against the roller 38. An inking-roller 78 is mounted in arms 85 pivoted to the arms 80, and is adjustably pressed against the roller 77 by a screw 87 carried by the arms 85 and screwed into the bar 82. Feeding sheets.-The support 29 is raised a variable amount depending on the height of the sheets by a reciprocating wedge 42, Fig. 1, actuated by mechanism which is substantially the same as that described in Specification 333,987, [Class 100 (ii), Printing processes &c.]. Delivery apparatus.-The used stencils are discharged into a receiver 22 provided with a hinged door 25 to allow removal of the stencils and with an opening 24 to permit the fingers to be inserted to facilitate this removal.