Patent GB-190709934-A (GB)
Title: An Improved Printing Machine.
Inventor: ZIEGLER HEINRICH
Filed: 1907-04-29
Granted: 1907-12-05
Abstract: 9934. Ziegrler, H. April 29. Cylinder machines with plane printing-surfaces.-A two-cylinder continuous-revolution perfecting machine comprises a bed a reciprocated by mangle-rack gear 20 or other means, which carries four formes b, c inked respectively by inking-apparatus g h, i k. The impression cylinders d, e rotate continuously in opposite directions and co-operate respectively with the formes b, c. The paper is fed from a web x by rollers t, severed by a knife on the carrier-cylinder p and a co-operating roller u, and delivered between the former and guides 17 to grippers g<1> on the impression cylinder d. After receiving an impression from the formes b, the sheet is delivered by cylinders p, q to the cylinder e made in the form of a segment, which impresses it against the formes c during the travel of the bed in the opposite direction. The perfected sheet is delivered by a roller r to folding mechanism or to a table s. The cylinder d is mounted in movable bearings which are raised during, the return stroke of the bed. Feed boards 18 or 19 for hand feeding may be provided. A set-off web may be passed round the impression cylinder e. Instead of being held on the cylinders d, e, p, q by grippers as described, the sheets may be held pneumatically or by movable needles or impaling pins. In a modified machine illustrated in Fig. 3, paper is fed from both ends and the employment of a setoff web is obviated by causing the set-off from one sheet to be made on a clean sheet from the other source, the set-off being subsequently covered by a direct impression from the same forme. The formes b, c are inked respectively by inking-apparatus g h, i k, the interior apparatus h i being supplied with ink from a duct f<1>, parts o on the cylinder p serving as distributing-surfaces. The impression cylinders d, e are of equal size, are rotated continuously in opposite directions, and are supported in movable bearings which permit them to be raised clear of the formes during the return stroke. The paper is drawn from reels x, is cut up by rollers u, v, and fed to the grippers 9 of the cylinders d, e by tapes 16. A sheet supplied from the other web and already printed on one side by the other printing couple is superposed by the carrier cylinders p, q upon the sheets on each of the cylinders d, e, being held by a second set. of grippers 10. These sheets are then perfected, the set-off from the first printing taking place on the clean sheet beneath. The finished sheets are conveyed by cylinders p, q to delivery tapes 23, while the underlying sheets remain and receive a direct impression on top of the set-off. The sheets thus once printed are conveyed across from one impression cylinder and superposed on the other cylinder on clean sheets supplied from the other source, and are then perfected and delivered to the tapes 23. The machine may be arranged to work as two separate machines if desired. Feed-boards for hind feeding may also be furnished. The machine may also be adapted for printing sheets of various sizes by altering the speed of the feed and cutting rolls t, u, v. In a modification, the clean sheet is held on the cylinders d, e by the grippers 9, while the second sheet is held by needles pivoted within the cylinder.