摘要:
There is described a device and method for magnetically transferring indicia to a coating composition, such as an ink or varnish, applied to at least a part of the surface of a substrate, the coating composition comprising at least one type of magnetic or magnetizable particles. The device comprises a body subjected to a magnetic field generated by appropriate electromagnetic means, which body carries determined indicia in the form of engravings on a surface of the body, which engravings influence orientation of field lines of the magnetic field. The body comprises at least one layer of material of high magnetic permeability in which the engravings are formed. In unengraved regions of the layer of material of high magnetic permeability, the field lines of the magnetic field extend substantially parallel to the surface of the body inside said layer of material of high magnetic permeability.
摘要:
There is described a numbering device (1) for carrying out numbering in sheet-fed or web-fed numbering presses, the numbering device (1) comprising a numbering unit (6) with rotatable numbering wheels (7) carrying alpha-numerical symbols thereon, which numbering wheels (7) are disposed next to each other and rotate about a common rotation axis, the numbering device (1) further comprising electro-mechanical actuation means for setting the position of the numbering wheels (7). The electro-mechanical actuation means are entirely located within the numbering device (1) and are mechanically autonomous, the electro-mechanical actuation means comprising a plurality of independent driving means (15, 18-23; 23*) for actuating a corresponding plurality of the numbering wheels.
摘要:
There is described a numbering system for carrying out numbering in a printing press comprising a numbering cylinder, a rotatable shaft defining a rotation axis, at least one supporting disc mounted on the rotatable shaft for rotation therewith, the supporting disc comprising a peripheral mounting ring for mounting of at least one numbering device (1.06; 2.06) on a periphery of the supporting disc, which numbering device (1.06; 2.06) is secured to the peripheral mounting ring (1.43) by means of a clamping mechanism. The peripheral mounting ring (1.43) has a T-shaped cross-section defining a pair of annular mounting grooves (1.43a, 1.43b) on each side of the peripheral mounting ring (1.43). The numbering device (1.06; 2.06) comprises clamping elements (1.50; 2.50) on each side of the numbering device (1.06; 2.06) which are adapted to cooperate with the annular mounting grooves (1.43a, 1.43b) for securing the numbering device (1.06; 2.06) onto the peripheral mounting ring (1.43). The clamping elements (1.50; 2.50) are preferably spring-loaded clamping elements.
摘要:
There is described a device and method for magnetically transferring indicia to a coating composition, such as an ink or varnish, applied to at least a part of the surface of a substrate, the coating composition comprising at least one type of magnetic or magnetizable particles. The device comprises a body subjected to a magnetic field generated by appropriate electromagnetic means, which body carries determined indicia in the form of engravings on a surface of the body, which engravings influence orientation of field lines of the magnetic field. The body comprises at least one layer of material of high magnetic permeability in which the engravings are formed. In unengraved regions of the layer of material of high magnetic permeability, the field lines of the magnetic field extend substantially parallel to the surface of the body inside said layer of material of high magnetic permeability.