Abstract: An indicating device for a printing machine includes a scanner for producing signals corresponding to an input print image to be printed. Desired or actual setting values for ink keys are converted into digital signals and are mixed with the signals from the scanner. The mixed signals are simultaneously transmitted to a display device which displays the setting values superimposed over the input print image to be printed.

Abstract: An arrangement for printing machine plate cylinder adjustment to zero position includes an evaluation circuit which is interposed between a potentiometer which issues an electrical signal representative of the instantaneous position of an adjustment transmission driven by a motor, and motor protection devices for the two senses of rotation of the motor. The evaluation circuit includes an A/D converter unit which is connected at its input side with the potentiometer and at its output side via at least one equivalence circuit and a flip-flop with respective AND-gates which are arranged ahead of the motor protection devices and are also connected at their inputs directly to an output of the A/D converter unit, and at least one additional AND-gate which is connected via at least one up-counter with the equivalence circuit.

Abstract: A method of automatically adjusting a printing machine which is selectively operatable in a single-side printing mode and in a two-side printing mode and includes a sheet turning drum, gripper systems and controls therefor, and a ring gear, comprises, during the adjustment from the single-side printing mode to the two-side printing mode and commencing from a first initial position, the succession of steps of adjusting the angular position of the sheet turning drum, adjusting the gripper system controls, and adjusting the angular position of the ring gear, including releasing, angularly displacing, and engaging the ring gear; and during the adjustment from the two-side printing mode to the single-side printing mode and commencing from the first initial position, the succession of steps of adjusting the angular position of the ring gear, including releasing, angularly displacing, and engaging the ring gear, adjusting the gripper systems controls, and adjusting the angular position of the sheet turning drum.

Abstract: A lengthwise folding arrangement for webs has a drawing-in roller, a horizontal guiding plate which forms a folding edge, a folding mandrel arranged under a plane of a web edge extending between the drawing-in roller and a withdrawing roller, a conical tip provided on the folding mandrel forming a harmonous transition to the folding edge of the guiding plate, and a guiding rod extending over the guiding plate diagonally to the folding mandrel to the rear side of the line of intersection of the edge and the withdrawing roller.

Abstract: A sheet-separating device for separating individual sheets from a stack, for example in the printing machine includes pneumatically operated suction heads engageable with the uppermost sheet of the stack, a four-link transmission device effecting a vertical movement of the suction heads relative to the stack and having a swinging arm connected to the suction heads, and an oscillating device including a pivotable connecting rod connected to the suction heads, and a vertical slide connected to the connecting rod so that a limited oscillating horizontal movement is imparted to the suction heads in addition to the vertical movement.

Abstract: In a method and an apparatus to test folded sheets for folding deviations from the reference folding line, to be used in pocket folding - or cutting folding machines, markings are made on the folding material, corresponding with the print format, and are sensed by sensors, preferably electro-optical reflection sensors after the material has been folded inside the machine, to obtain the position information. The evaluation position information derived from the output of the sensors for a number of folded sheets is rigid to determine the adjustments of the machine necessary to correct the deviations.

Abstract: A hydraulic drive for a multi-color, sheet-fed rotary printing machine assembled of a plurality of consecutively arranged press units each having a set of sheet-processing cylinders and gear trains interconnecting the cylinders, is constituted by the following combination:a plurality of constant-flow, radial piston type hydraulic motors directly connected for driving a cylinder in each press unit;a first hydraulic control means including a main directional control valve and an auxiliary or switching directional control valve connected between the source of pressure fluid and the hydraulic motors; anda second hydraulic control means including a control cylinder-and-piston unit assigned to each operational radial piston of the motors and controlled by the latter so as to overlap in the cross-over position of the motors both the intake port and the discharge port for working fluid.

Abstract: The invention relates to a collating machine with several successively arranged feeders for the conveyance of sheets of paper on a conveyor line and with control devices at each feed station to monitor the formation of book blocks from which machine cycle-dependent error signals are output in the event of missed or duplicate feeding. It is the object of the invention to alter the operational flow of a conveyor line in such a way that in the event of defective book blocks, a manual separation of the book blocks and sorting of the individual sheets or sheet layers into the magazines at the feed stations can be eliminated. According to the invention, this is achieved by using a micro-computer to control a sliding rejection device with a station number indicator, located at the end of the conveyor line for the book blocks.

Abstract: A pick-up unit in a printed sheet transport device for a printing machine includes a gripper shaft, a number of grippers and a number of corresponding counter gripping members, and a traverse which encloses the gripper shaft and the grippers at three sides. The traverse has a front wall, an upper wall and a rear wall; the latter extends to a plane of transporting of the printed sheet at an acute angle and is formed with a projection which extends inwardly from the rear wall of the traverse.

Abstract: The monitoring device serves to monitor the formation of bookblocks at depositing stations for collating machines and to release a control impulse at faulty formation of a bookblock. The object of the invention is to accomplish the formation of bookblocks on collating machines, provided with suction drums, and to reduce expenses of adjusting the machine for processing of varying paper thicknesses. The object is to construct a device, in such a manner that the precalculated position of a contact lever may be simply adjusted upon a base plate corresponding to any paper thickness and that the smallest deviations of position of the contact lever in one or another direction may be deleted while ensuring regularity of signal.According to the invention, this object is accomplished by fastening at least one spring mounted stop for setting the precalculated position of the contact lever upon a base plate which is movably disposed relative to the machine frame.

Abstract: In a control system for a plurality of ink zone adjusters in a printing machine each adjuster is connected via a main control circuit and a first bidirectional address and data bus to an input and output unit where the measured data are stored on specific addresses to be retrieved for later use. An additional storage control circuit is connected to the first bidirectional data bus to provide an intermediate storage of the measured or retrieved data. The addtional storage control circuit includes an addressing circuit controlled by a program control circuit to apply addresses pertaining to individual printing units to corresponding storing circuits.

Abstract: An arrangement for adjusting the cylinders in a rotary printing press, in particular the distance between the two cylinder axes of the corresponding cylinders has a first roller ring which is arranged centrically with respect to the one of the cylinder axes of the respective one of the cylinders and a second roller ring radially movable and being arranged on the other cylinder. The second roller ring cooperates with the first roller ring and defines a bore hole of a predetermined diameter. A conical bushing is provided for supporting the second roller ring in the other cylinder and is axially movable with respect thereto so as to adjust the distance between the two cylinder axes. The conical bushing has a largest diameter which is still smaller than the diameter of the bore hole.

Abstract: A device for adjusting ink or moisture-application rolls to a feeding roll and a printing cylinder in a printing machine, which includes two eccentrics positioned on the shaft of the feeding roll and provided with radially extended rods pivotally connected to the piston rods of pneumatic working cylinders and two pivotable double-arm levers centrally positioned on the respective eccentrics and connected with their upper arms to the ink or moisture application rolls. Adjustment of the ink or moisture application rolls to the feeding roll is effected upon actuation of the working cylinder and rotation of the eccentrics and adjustment of the ink or moisture application rolls relative to the printing cylinder is effected upon the pivoting movement of the double-arm levers.

Abstract: A moistening system for a printing machine, which can be suitable for application to a printing roller either of a wetting agent or alcohol, comprises a fountain roller partially immersed in a reservoir containing an agent to be applied to the printing roller, a slip roller in contact with the fountain roller, a rubbing cylinder rotated with the speed of the printing machine and applying the agent to the impression roller through distributing rollers, and a vibrating roller interpositioned between the rubbing roller and the slip roller to transmit the agent from the slip roller to the rubbing roller. The slip roller is connected to the rubbing roller so that they rotate with the same velocity.

Abstract: An ink-applying device includes a rotary ink-application roller and a rotary dosing roller positioned between the ink-application roller and a funnel-shaped ink reservoir filled with ink. A bottom wall of the dosing roller is formed with a longitudinal row of conical holes of differing diameters.A number of dosing chambers of differing diameters are formed, respectively in the circumferential surface of the dosing roller to receive ink from the ink reservoir through those holes and to transmit it to an ink-application roller upon rotation of the dosing roller. A plurality of vertically movable plungers are mounted in the ink reservoir to selectively close or open the filling holes in the bottom wall communicated with respective dosing chambers in the dosing roller. A predetermined ink profile on the dosing roller may be obtained in each ink zone by selecting holes and dosing chambers to be closed and open.

Abstract: A separating unit for book blocks processed in a book binding system and fed at a first travelling speed from a folding or glueing machine in two parallel horizontal stacks in which the blocks are fed one-by-one in an upright position on a first conveying means, comprises second conveying means cooperating with the latter and travelling at a higher speed, a stack support bridging the transfer area between the first and second conveying means and guiding the randomly separated book blocks on the second conveying means. In order to uniformly space apart the separated book blocks, a timing switch is provided at the end portion of the second conveying means and is controlled by two light barriers which during the passage of the leading book blocks arrest the successive book blocks and release the same upon the passage of the leading block past the first light barrier.

Abstract: A stack height control apparatus for sheet feeders in sheet processing machines. The apparatus comprises a 2:1 divider connected to stack height sensors, a comparison timing stage connected to the divider, a comparator stage connected to the sensors, to the divider and to the comparison timing stage, a forward-backward shift register connected to the comparator stage and at least two timing stages each connected to the shift register and to the comparator stage. The apparatus allows automatic feeding of sheets to machines such as employed for example as printing presses.

Abstract: The present invention is directed to a process for determining the thickness of adhesive layers placed on book block backings by initially measuring the position of a backing before adhesive is applied to establish a reference point, applying adhesive, then measuring the position of the backing with adhesive to determine the thickness of the adhesive layer. Distances to a standard reference plane may be measured both before and after application of the adhesive, and the differences in respective positions may be used to determine thickness of the adhesive layer. Two such measurements before and after adhesive application are recommended, with the readings averaged to give a mean thickness of the adhesive layer. Measurements are preferably carried out by means of laser beam technology, with the aid of a beam splitter.