摘要:
An assembly for controlling individual positioning elements in a delivery region of a sheet-fed printing machine, including at least one computer, at least one input device connected to the computer for inputting therein characteristic data specific to a sheet and/or to the printing machine, the computer having devices for further processing the characteristic data, and a control device operatively connected to the computer and having individual positioning elements for causing a format-dependent adjustment in accordance with the inputted characteristic data, the computer having devices for calculating, from the characteristic data, energy of the sheet oncoming to the delivery region and, in accordance with the calculated energy value, also for calculating an actuating value for at least one individual positioning element in the delivery region so that energy withdrawal by the individual positioning element is substantially equal to the energy of the oncoming sheet in the delivery region, the control device having devices for actuating the individual positioning element in accordance with the calculated value; and method of operation.
摘要:
Clamping and tensioning device for an inwardly bent trailing edge of a flexible printing plate disposed in an axial gap at the circumference of a plate cylinder adjustable in axial spacing and cooperating with a blanket cylinder, the printing plate being fixable at a leading edge thereof on the plate cylinder and being tensionable in circumferential direction on the plate cylinder, includes two clamping bars displaceably supported in the axial gap and forming therebetween a clamping slot for receiving therein an inwardly bent trailing edge of the printing plate, the two clamping bars extending axially in the gap within the cross-sectional contour of the plate cylinder and being loadable by reversible opposing clamping forces as well as by reversible tensioning forces in common in tensioning direction of the printing plate, and being respectively braced against the plate cylinder, the two clamping bars being formed with radially outer edges, the clamping and tensioning device being radially displaceably disposed in the axial gap of the plate cylinder, and a device for applying drive forces to the clamping and tensioning device for displacing the clamping and tensioning device with the radially outer edges of the two clamping bars radially outwardly at least to the cross-sectional circumferential contour of the plate cylinder, with the clamped bend of the trailing edge of the printing plate being displaceable back within the contour of the plate cylinder.
摘要:
Cable lead-through device includes a frame-shaped mounting member open at one side thereof, a cable lead-through element formed of at least one substantially parallelepipedal block of foamed plastic material surrounding a respective cable and received in the mounting member, and a retaining member for locking the open side of the frame-shaped mounting member, the cable lead-through element having an outer dimension limited by the mounting member, the substantially parallelepipedal block being of one-piece construction and being formed with a bore extending along an axis of the block, as well as with a slit extending alongside the bore for accommodating a cable introducible therethrough into the bore.
摘要:
Ink duct for offset or letterpress printing machines has an ink metering device by which a respective ink gap is adjustable zonewise in the axial direction of an ink duct roller. The ink metering device has metering elements pressable against the ink duct roller through the intermediary of a foil covering the metering elements, the foil being fastened so as to be movable tangentially to the ink duct roller. A device is provided for holding the foil, and an adjusting device is coupled with a motorized drive an engageable with the foil holding device for progressively moving the foil tangentially to the ink duct roller at a substantially uniform feed rate so as to dispose succeeding locations of the foil at a given distance from the ink duct roller corresponding to the width of the respective ink gap.
摘要:
A device designed as a magazine is disclosed for carrying away and/or supplying printing plates from and to a plate cylinder of a printing machine, in particular to ensure the automatic exchange of printing plates with a plate removing and a plate supplying arrangement. At least one cartridge for the printing plates is removably associated with the magazine. A corresponding process is also disclosed.
摘要:
A device in the form a magazine is disclosed for carrying away used printing plates from the plate cylinder of a printing machine. The device applies in particular to the automatic exchange of printing plates. The device has an arrangement for carrying away the plates with (first) holders for each printing plate capable of being activated. The (first) holders are arranged on a (first) carriage that can be moved along a (first) guide substantially over the whole length of the device, inside the magazine.
摘要:
A device designed as a magazine is disclosed for supplying printing plates to a plate cylinder of a printing machine, in particular to ensure the automatic exchange of printing plates by means of a plate supply arrangement. The plate supply arrangement (16) has several distributed (second) holding means (55) for the printing plates (9) that can be successively activated.
摘要:
An encoder device for the determination of absolute angle or linear segments is described, with which the distance from the actual to the reference position is determined upon prompting and output via incremental signals. This encoder offers new functions for the incremental measuring system employed up to now. The transition to the absolute measuring system is also made possible according to requirements.
摘要:
A method of transferring printing ink from an intermediate carrier to a printing-ink receiver selected from the group consisting of a further intermediate carrier and a substrate, wherein the printing ink adheres either in a granular state or in an at least partially liquid state to the intermediate carrier includes, with respect to the first-mentioned state of the printing ink, melting the printing ink at a side thereof facing away from the intermediate carrier before transferring the printing ink to the printing-ink receiver and, with respect to the second-mentioned state of the printing ink, reducing the adhesion of the printing ink to the intermediate carrier with a separating agent at one time at least before and during transfer to the printing-ink receiver; and a device for performing the method.
摘要:
Method of controlling a printing device of a printing press wherein substrates to be printed are conveyed on a conveying path to the printing device, the conveyed substrates being detected by a sensor disposed along the conveying path, upstream of the printing device, as viewed in a conveying direction of the substrate, includes starting a printing operation whenever a leading edge of a respective substrate is detected, and stopping a printing operation whenever a trailing edge of the substrate is detected.