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 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.

Abstract: A printing press is provided with a safety device mounted in the vicinity of a gap formed between two counter printing rollers for preventing the gap from intrusion by foreign elements, such as a mop or the hand of an operator. The device includes a four-link transmission unit operatively interconnected between pivotable guard plates and a cam switch adapted to actuate an end switch of the printing press to shut the latter off. The guard plates are swung away from the rollers so that the gap is enlarged.

Abstract: A control provision is provided for separating sheets of printed matter. An initiator serves to generate electrical pulses proportional to the transport speed, which are transformed into compensation times depending on the pulses of the operating delay time and of the fall delay time of the servo components, and which are connected to the servo components via coupling elements and following selection or control circuits. A transport means moves the printed material, a distributing guide is operated by the servo components and the sheets to be sorted out are removed independent from the speed of transport and without interference or disturbance of the other sheets.

Abstract: Disclosed is a control system for an ink blade of a printing machine provided with a series of key setting units each having a key position sensor and a key drive controlled by an adjusting device described in patent application Ser. No. 252,126. In order to achieve proper adjustment of marginal key setting units, there is provided a switching unit with a plurality of contacts assigned to respective key position measuring sensors and including additional switching contacts assigned to imaginary key position setting units adjoining the real setting units at each end of the ink zone. The additional marginal switching contacts are connected to the output of assigned sample-and-hold members which apply thereto the measured value from the extreme actual position sensors so that comparing differential transducer comparing the measured values of consecutive pairs of position sensors always produces a starting difference which does not exceed a predetermined limit value.

Abstract: A printing machine which has a plurality of printing units each including several rollers is equipped with a gear train which drives at least one roller of each of the printing units. At least associated two of the gear wheels of the gear train are coaxially mounted on a common shaft, one of them being movable toward and out of contact with the other gear wheel for establishing entraining connection therewith and for permitting angular displacement of the associated gear wheels relative to one another, respectively. The angular position of the associates gear wheels is to be changed when the mode of operation of the printing machine is to be changed from first page printing mode to first and second page printing mode. The arrangement which connects and disconnects the associated wheels includes a plurality of moving units which simultaneously act on the other gear wheel and which are mounted on an annular clamping element mounted on the other side of the one gear wheel from the one gear wheel.

Abstract: A control system for a printing machine having a main shaft with a constant ratio of its rotary speed to a drive speed of the printing machine, has a plurality of translationally, continuously rotatably and discontinuously rotatably movable regulating members controllable by a main shaft of the machine, and a single supply system operating by hydraulic energy and associated with the regulating members, wherein the supply system includes a fixed-displacement pump, an oil supply conduit connecting the fixed-displacement pump with the regulating members, an electrically actuated flow regulating valve acting upon an oil stream, and a signal transmitter with a signal processor arranged so that the flow regulating valve connected with the main shaft via the signal processor.

Abstract: A rotary sheet printing machine with a plurality of successively arranged printing mechanisms has a drive motor, a rotatable shaft extending between the printing mechanisms, a planetary transmission for each of the printing mechanisms and having a planetary gear carrier, and a worm gear transmission connecting the planetary gear carrier with a cylinder of each of the printing mechanisms.