摘要:
Die Erfindung betrifft eine Bogenwendevorrichtung für Rotationsdruckmaschinen in Reihenbauweise mit doppelt großen Druckzylindern, die mit einer einzigen doppelt großen Übertührtrommel bzw. Wendetrommel verbunden sind. Um ein Greifen des Bogenendes mit Greifeinrichtungen (5) zu ermöglichen, ist der der Wendetrommel (2) vorgesetzte Druckzylinder (1) mit einer verstellbaren Bespannung (10) bestückt, vorzugsweise mit einem Rolladen (10.1) und darüberliegender Folienbespannung (17), über die der Druckzylinder (1) seinen eigentlichen Durchmesser erhält.
摘要:
A system for compensating for roll deflection to provide uniform contact pressure across the width of a web disposed between a pair of counter rollers, comprising a first roller , mounted for rotation, a second roller mounted for rotation about a deflectable shaft, pressure applying means coupled to the ends of the deflectable shaft for moving the second roller into contact with the first roller, the second roller including an outer shell mounted for rotation relative to the deflectable shaft, a pair of end bearings disposed adjacent the ends of the outer sleeve and a pair of main bearings disposed inwardly from the end bearings a predetermined distance to transmit the applied pressure uniformly over the face width of the second roller when the second roller is used with a flexible first roller and self-adjusting deflection compensating means arranged proximate to the deflectable shaft for applying pressure to the ends of the outer shell in response to the deflection of the deflectable shaft by the pressure applying means to provide uniform pressure across the face width of the second roller when the second roller is used with a first roller having a high resistance to bending.
摘要:
Druckzylinder (1), mit in ihrer Form veraenderbaren Achse, bei welchem ein aeusserer Mantel (2) drehbar von einer in seinem Inneren angeordneten Welle (3), die im wesentlichen koaxial zum Mantel (2) angeordnet ist, an den Enden ueber Lager (10) und im mitteleren Bereich ueber Hebel (21) getragen wird, wobei die Hebel gelenkig mit dem mittleren Teil der genannten Welle (3) verbunden sind und an der inneren Flaeche (7) des Mantels (2), unter Zwischenschaltung von Lagern (22) und Betaetigungsmitteln (15), die zwischen der inneren Welle (3) und jedem Hebel (21) angeordnet sind, anliegen.
摘要:
The apparatus and methods of the present disclosure relate to devices comprising spinning magnets driven by electric motors for use with printing or coating equipment. These devices and methods are for orienting magnetic or magnetisable pigment particles in an unhardened coating composition on a substrate. Specifically, these devices and methods are for producing optical effect layers. The apparatus comprises a holder, onto which is mounted a motor and a permanent magnet assembly. The motor is configured to spin the permanent magnet assembly. The holder is configured to be removably fixed to a base of a rotating magnetic cylinder (RMC) or a flatbed printing unit.
摘要:
A security element comprising a magnetic layer and a print layer disposed on a translucent substrate is provided. The print layer is disposed between the magnetic layer and the substrate, and the magnetic layer comprises a composition having magnetic or magnetisable particles therein, each particle having at least one substantially planar surface. The print layer includes printed authentication data and the magnetic or magnetisable particles are orientated such that in a region of the magnetic layer covering at least part of the authentication data, at least some of the magnetic or magnetisable particles are orientated with their planar surfaces substantially parallel to the plane of the substrate, such that the authentication data is substantially concealed when the security element is viewed in reflected light at least along the normal to the substrate. The printed authentication data is of sufficient optical density that the authentication data is visible through the region of the magnetic layer when viewed in transmitted light.
摘要:
A rotary printing press comprising a central impression cylinder (12) and a plurality of colour decks (A-J) disposed at the periphery thereof, each colour deck including a printing cylinder (18) adapted to be set against the central impression cylinder (12) and having a reference mark (36) arranged in its peripheral surface, the printing press further including a detector (52) for detecting the reference mark (36), characterized in that the detector (52) is arranged in the peripheral surface of the central impression cylinder (12).
摘要:
A printing apparatus includes a plate cylinder (10) having a relief plate (50) mounted on at least a part of an outer periphery of the plate cylinder and being operable to be rotationally driven about a shaft center, and an impression cylinder (20) having a rigid outer periphery and being operable to be rotationally driven about a shaft center parallel to the shaft center of the plate cylinder. The impression cylinder is adapted to be brought into pressure contact with the relief plate (50) via a sheet-like print object (S) fed between the plate cylinder and the impression cylinder. A cushioning sheet (40) is attachable to and detachable from the outer periphery of the impression cylinder. The cushioning sheet (40) is elastically deformable when being brought into pressure contact with the relief plate on the plate cylinder via the print object. The cushioning sheet is restorable when being separated from the relief plate on the plate cylinder.