Patent GB-190219133-A (GB)
Title: Improvements in or applicable to Duplex Printing Machine, Multi-press or other Flat Web Press Printing Machines
Inventor: CHARLES FREDERICK LUETH
Filed: 1902-09-01
Abstract: 19,133. Lueth, C. F. Sept. 1, A.D. 1901, [date applied for under Patents Act, A.D. 1901]. Void. [Published under Patents Act, A.D. 1901]. Cylinder machines with plane printing - surfaces; associating - apparatus; folding paper; feeding- apparatus for webs.-Relates, more particularly, to duplex presses, and consists in means for rewinding a printed web and subsequently unwinding this printed web and associating it with the web that is then being printed by the machine. Fig. 3 shows a sectional elevation of the machine printing and re-winding the web R, Fig. 4 shows the web R being subsequently unwound and associated with another web, and Fig. 5 shows the re-winding mechanism and means for driving it at adjustable speed. The web R is passed through the printing-mechanisms B, B<1>, as shown, in the usual manner, and passes from the feeding- out tapes E over a roller t<8>, in arms t', and between the re-winding cylinder G and the spool or spindle L on which it is re-wound. The spindle L is removably journalled in carriages M having wheels running on rails N having inclined and horizontal portions. The carriages have depending side flanges, which embrace the upper edges of the rails N, the latter being I-shaped in section. The spindle L is adjustable longitudinally by a screw on one of the carriages. When the web is being re-wound, it rests against the roller G, and the carriages are pulled downwards, to press the two rolls together, by cords Q passing over guide rollers q &c. and having adjustable weights at their ends. One of the rails N is adjustable towards and from the other,. along the, transverse bars N', N<2>, for different widths of web. The re-winding roll G is driven by means of a cone pulley H on its shaft g, and a second cone pulley H<1> inclined in the opposite direction. Between the two pulleys H, H<1> runs a friction belt H' movable to different parts of the pulleys for varying the speed of the cylinder G. The belt H<2> is moved by means of sliding rods I connected at their outer ends by a piece I' movable by a screw and hand-wheel P. The pulley H' is driven by gearing from the printing-press. The rods I slide in parts J, J<1> of a frame J<2>, and this frame is formed with slots in which the bearings j<3> of the pulley H<1> slide. The shaft of the pulley H<1> is connected by rods k to eccentrics k<3> on a shaft having a lever k<4> by which the pulley H<1> may be moved towards or away from the pulley H. The wheels of the carriages M may be locked by a bar having pins entering holes in the wheels, and, when the printed web R is to be unwound, Fig. 4, the carriages are locked on the rails N by set-screws. For unwinding, the web R is passed over a roller t<3> in pivoted arms and between the cylinder G and tapes T, and, when of half width, it is passed to the rollers u<1> of the folder V. When of double width, it is slit longitudinally and one half r is passed to the rollers u<1>, and the other half r<1> is passed round the rollers t<6>, t<9>, round diagonal turning-bars D<1>, by which it is transferred laterally, and thence over a roller u<3> to the rollers u for associating with the half-web r. One half R<1> of the main web being printed is passed directly' to the rollers u<1> and the other half R<2> is transferred laterally-by turning bars D, and passed fround a roller u<2> to the rollers u<1>. A brake, consisting of a split sleeve or band adjustable by a screw, is applied to the spindle L when the web R is being unwound.