Abstract: 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.

Abstract: 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.

Abstract: Device for depositing printed sheets on a sheet pile, including at least one pair of mechanical grippers for seizing the printed sheets at a respective leading edge thereof, the gripper pair being movable over the sheet pile and being controllable for releasing the printed sheets at a given instant of time, a pneumatic device for applying varying pressure to defined regions over a depositing surface of the respective printed sheets for decelerating and transporting the sheets against a mechanical stop, and adjusting elements for the grippers and the pneumatic device, also includes a control device including a computer and having an input and an output, the control device being connected via the output thereof to the adjusting elements, an input device for receiving sheet-specific and process-specific data being connected to the control device via the input thereof, the sheet-specific and process-specific data including data regarding two-dimensional mass distribution of the respective printed sheet, the adjus

Abstract: 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.

Abstract: A sheet-guiding assembly in a sheet delivery system of a sheet-fed printing press includes a plurality of sheet grippers disposed on at least one endlessly revolving chain of a first gripper system for gripping a leading edge of a sheet, and a plurality of after-grippers disposed on at least one endlessly revolving chain of a second gripper system for gripping a trailing edge of the sheet, the sheet delivery system being extended in length and defining a horizontal transport path for the sheet therethrough, the first and second gripper systems being disposed so as to be adjustable in phase with respect to one another at the extended sheet delivery system, the sheet grippers and the after-grippers being attached to the first and the second gripper systems, respectively, for holding the sheet by the leading and trailing edges thereof, respectively, on the horizontal transport path of the sheet over the length of the sheet delivery system.

Abstract: 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 dispos

Abstract: Sheet-fed offset printing machine for automated changing of a printing plate having a plate cylinder for carrying a printing plate, the plate cylinder being formed with a gap extending in axial direction thereof, a blanket cylinder formed with a gap extending in axial direction thereof disposed in cooperative engagement with the plate cylinder, and a clamping device disposed in the plate-cylinder gap and including a pair of movably disposed clamping rails defining therebetween a clamping slot located within the cross-sectional contour of the blanket cylinder, includes an insertion device for inserting, into the clamping slot defined by the clamping rails, a bent edge of a printing plate disposed on the plate cylinder, the bent edge being located at a trailing end of the printing plate, the insertion device being disposed in the gap formed in the blanket cylinder and having a thrust body formed with a thrust surface movable radially out of the cross-sectional contour of the blanket cylinder against the trailin

Abstract: An installation for supplying pressurized gas to pressure medium-actuated systems of a printing machine is disclosed. The installation comprises at least one compressor; a plurality of pressure tanks; and a plurality of sensors for measuring a system pressure, each of the pressure medium-actuated systems of the printing machine having at least one of the pressure tanks and one of the sensors associated therewith; pressure pick-off connections fluidically communicating with the pressure tanks; a pressure medium distribution and feed device for connecting an input side of the pressure tanks to the at least one compressor; the pressure medium distribution and feed device having actuators; and an electrical control apparatus controlling the actuators and the at least one compressor, the control apparatus being connected with the sensors and with the machine control of the printing machine.

Abstract: An auxiliary-pile carrier in a pile lift of a sheet-processing machine is disclosed. The pile lift has a main-pile lifting unit and an auxiliary-pile lifting unit. The auxiliary pile is supported on a pile board having grooves formed in an upper surface thereof.

Abstract: A device for movably positioning in a plurality of positions a magazine for automatically changing printing plates in a printing machine for changing the printing plate of the plate cylinder, replacing the printing plates of the magazine, servicing the printing machine and normal operation, includes a device for mounting the magazine, including a vertical guide wherein the magazine is displaceable, and a horizontal shaft about which the magazine is swivelable, and drive devices for displacing and swiveling the magazine.

Abstract: An electrical machine includes a motor having a motor housing and a stator and a rotor received in the housing, and a device for detecting rotor position and rotational speed disposed outside the motor housing on a motor shaft carrying the rotor, the device being fixed to the motor housing.

Abstract: 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 h

Abstract: A method of determining the rotational speed of a three-phase brushless DC-motor, which comprises scanning at least one signal trace disposed on a revolving rotor of a three-phase brushless DC-motor by means of three sensors, each emitting a signal having two possible signal states, the signal trace and the sensors being of such construction and arrangement that eight values are realized by a logical combination of the two possible signal states, respectively, of the three sensors; detecting the rotor position with six of the values; and determining the rotational speed with the other two values.

Abstract: Printing machine with at least one printing unit having rotating cylinders, comprising an energy converter disposed at least partially in one of the cylinders for converting at least some rotational energy of the cylinder into electrical energy and an energy storage device also disposed in the cylinder for storing the electrical energy.

Abstract: A clutch device for phase-synchronous coupling of rotating machine elements, includes two coding elements, respectively, co-rotatable with two driven machine elements, a sensor fixed in position adjacent the coding elements, the coding elements having codings thereon which are variable in angular position with respect to the sensor, the sensor having a device for registering information composed from respective codings of the two coding elements, and a clutch control unit connected to the sensor for receiving the information therefrom.

Abstract: The invention relates to a sheet delivery system for a sheet-processing machine in which the sheets to be deposited are conveyed horizontally and are deposited on a sheet stack which is carried by a stacking table and lowered with increasing stacking height, said sheet delivery system comprising an auxiliary stacking table, the grate-like bars of which, can be inserted into the stacking area. Auxiliary guides are provided for facilitating the manual insertion and removal of the heavy auxiliary stacking table into and from the sheet stack.

Abstract: A method of conveying sheets by displacing in a sheet-conveying direction an upermost sheet of a pile of sheets having a contact surface of given length includes linearly lifting the sheet at a trailing edge thereof, briefly opening periodically and successively suction-air openings disposed above the pile of sheets in the sheet-conveying direction so as to form a wave crest running through the sheet starting from the trailing edge thereof and moving the sheet a displacement distance in the sheet-conveying direction in a plane relative to a top surface of the pile of sheets. The displacement distance corresponds to an amount by which the length of the sheet contact surface is shortened by the formation of the wave crest. A device is also provided for performing the method.

Abstract: Device for detecting a position of an edge includes a row of light-emitting elements forming an angle with the edge, an optoelectric transducer disposed adjacent the light emitter elements for receiving light emitted by the light emitting elements, first means for guiding the edge between the row of light-emitting elements and the optoelectric transducer, second means for pulsatingly energizing the light-emitting elements sequentially, and third means for scanning an output voltage of the optoelectric transducer in synchronism with the pulsating energization of the light-emitting elements.

Abstract: A device for conveying sheets in a given travel direction includes a conveying head having a vacuum-applying device for removing an uppermost sheet from a pile of sheets and for maintaining the sheet under suction, the conveying head and the uppermost sheet being relatively movable in the given travel direction, the uppermost sheet being held against a sheet-contacting surface of the conveying head under suction, the conveying head having at least one rolling body surrounded by suction air and frictionally engageable with the uppermost sheet for moving the sheet in the given travel direction.

Abstract: Device for positioning an adjusting member which includes a pneumatic adjusting cylinder and an electromagnetically actuated valve operating in a low-wattage range for controlling aeration and venting, respectively, of the adjusting cylinder, comprising an electromagnetic system as well as an armature plate serving simultaneously, as a valve member for venting the cylinder, the armature plate being displaceable from a position thereof at which it defines a maximum air gap with the electromagnetic system to a position thereof at which it defines a zero air gap with the electromagnetic system in an excited condition of said electromagnetic system, said electromagnetic system in said excited condition thereof closing the cylinder against venting, and in the unexcited condition thereof opening the cylinder for venting.