Abstract: A remote adjustment and measuring unit for an ink zoning screw of a doctor blade mechanism in an ink well of a printing machine comprises a housing in which is adjustably mounted a guiding bearing for the rear end portion of the zoning screw; a driving electric motor and a measuring potentiometer are provided respectively with pinions in mesh with a transmission gear on the rear end portion of the screw, and the motor and the potentiometer are each mounted on an adjustable supporting plate.

Abstract: A sheet gripping arrangement of a rotary printing machine has a sheet gripper abutment member, a soft gripper seat member, a gripper shaft having a gripper shaft pivot point, a sheet gripping element including a gripper finger cooperating with the gripper seat member and eccentrically pivotable relative to the gripper shaft about a gripper finger pivot point so as to move first over a substantially flat gripping path and then to move during its final movement phase normally to the latter, and a threaded abutment member arranged in the finger member and acting against the sheet gripper abutment member, wherein the gripper finger member is arranged at an angle of substantially 90.degree. to a contact point of the threaded abutment member with the sheet gripper abutment member, to the gripper finger point, and to the gripper shaft pivot point.

Abstract: A suction type separating element is assembled of a base body supported for a reciprocating vertical movement above the sheet edge, a hollow cylinder of elastomeric material having a circumferentially variable thickness and being provided in the region of the minimum thickness with an inwardly directed constriction preferably in the form of an annular section. The lower base of the elastomeric cylinder is terminated with a suction head adapted for abutment against the sheet to be lifted. Upon the formation of a vacuum in the hollow cylinder, the latter deforms in the range of the constriction and lifts the suction head with the sheet portion upwardly.

Abstract: The sheet fed rotary press includes a feed cylinder cooperating with a feed table extending in a plane situated below and in spaced relationship from the periphery of the feed cylinder. An auxiliary gripper system located under the feed cylinder provides for the transfer of respective sheets from the feed table to the feed cylinder.

Abstract: A control device for remote adjustments of ink zones in a printing press includes a control system comprising program request control connected respectively to multiplexers provided at the input side of the control system and to multiplexers provided at the output side of the control system, and a single motor control system. The multiplexers are connected to an adjustment system activating ink knife support elements. The control device further includes a differential former interconnected between the program control request and the multiplexers at the input side of the control system, and a computer interconnected between the differential former and the single motor control unit. The motor control unit controls the adjustment system so that the unsteady course of the positions of the ink knife support elements is balanced to the steady function of the knife bending curve.

Abstract: An arrangement for facilitating the mounting of printing plates on a plate cylinder of an offset printing machine. Two arms are mounted atop the machine at the opposite lateral sides thereof and have free ends provided with hooks. A rail is suspended from these hooks and carries quick-coupling devices which engage the trailing edge of a printing plate to be mounted. The hooks are suspended on ropes which are wound upon rollers mounted on the free ends of the arms; turning of the rollers in a sense causing unwinding of the ropes is resisted by torque springs or similar devices; this resistance can be varied to compensate for printing plates of different weights. Thus, the weight of the printing plate cannot cause the ropes to unwind; however, when the leading edge of the printing plate is connected to the plate cylinder and the cylinder is slowly rotated to take the plate up on it, the pull exerted by the cylinder causes unwinding of the ropes.

Abstract: A sheet-feeding arrangement for transferring sheets from supply stack to a printing machine includes a sheet-feeding table having a rear end and a front end. A pair of belt conveyors are provided in the arrangement for advancing a group of overlapped sheets from one end of the table to another. A first pair of stops for preliminary aligning of the sheets being advanced is arranged rearwardly from the front edge of the table and a second pair of stops are arranged at the front edge of the table for final aligning of the sheets being transferred. The first pair of stops are spaced from the second pair of stops in the direction of sheet advancement by a distance which is at least equal to the length of the individual sheet of the stream to prevent interference of the group of the following advancing sheets with the group of the preceding advancing sheets being moved from the preliminary steps towards the final stops.

Abstract: A driving mechanism for groups of operating elements arranged in a rotary sheet guiding cylinder of a sheet-fed printing machine includes a pair of control shafts arranged in the guiding cylinder parallel to its axis of rotation and being driven by transmission gears arranged in the cylinder, two sets of cams, each supported on an assigned control shaft for activating a group of operating elements in a selected operational mode of the machine, and clutch means provided between the transmission gears and the shafts and operated from one point to actuate one control shaft and deactivate the other control shaft.

Abstract: A pressure control arrangement for controlling pressure between a printing roller and an offset roller by measuring a force exerted in a bearing of the printing roller when the latter rotates with an angle .psi.. The arrangement includes a piezoelectric pickup positioned on the internal surface of the bearing of the printing roller, a measured pressure value processor for receiving a signal from the piezoelectric pickup, an indicator generating a signal corresponding to a desired pressure value and means to compare the first abovementioned signal with the second mentioned signal. The arrangement also includes a positioner circuit which receives the compared signal and applies the same to a drive member which adjusts the position of the bearing of the offset roller thereby adjusting printing pressure between two contacting rollers for printing on sheets of paper.

Abstract: The control device for a suction gripper on a guiding cylinder of a sheet fed rotary press comprises a tumbler shaft mounted on the sheet guiding cylinder and a suction unit swingable about a pivot point which is supported for movement about the tumbler shaft. The suction unit is either positively driven by a cam drive or self-adjustable by means of a tension spring between the unit and the tumbler shaft.

Abstract: A bearing arrangement for cylinders utilized in printing machines serves for supporting a cylinder trunnion in a machine frame. The bearing arrangement is composed of a sliding bushing surrounding the cylinder trunnion, a flange bearing supported in the machine frame and encompassing the sliding bushing. A second bushing is mounted between the flange bearing and the machine frame which has an outwardly radially extending central collar arranged in contact with the internal axial bore of the machine frame and two bonding elements inserted between the spaces in the second bushing formed by said collar and the axial bore of the frame for compensation of misalignment between the bearing and the machine frame when the cylinder trunnion is inserted into the frame.

Abstract: The reciprocating auxiliary gripper system includes a parallel linkage the coupler of which supports a spring-biased gripper in the form of a suction head which is lifted upon application of suction to a spring space, so that the sheet performs during its transport from a takeover position on the feed table to a transfer position opposite a feed cylinder an additional movement superposed to the rocking movement of the linkage.

Abstract: The method of and device for controlling the roll exchanging operation in an unrolling device includes the provision of a set of control numbers computed from the counted number of revolutions of the old roll and from the length of the withdrawn web prior to the initiation of the roll exchanging operation; the control numbers are computed from two intervals of the measured web length, from corresponding intervals of the counted number of revolutions, from the thickness of the web, from the feeding speed of the web, from the time constents of the control elements of the roll exchanging device, from the length of the adhesive leading edge of the new roll, from the desired length of the residual trailing end portion of the old web and from the diameter of the supporting central reel; computed control numbers are stored and compared in a comparator with the actual number of revolutions of the old roll whereby the coincidence of the actual number with the stored number generates in a control unit a control signal

Abstract: A journal bearing of printing machines for permitting compensation for misalignments between a trunnion and a sliding bushing by means of a flanged bearing sleeve. The flanged bearing sleeve is provided with a plurality of grooves each being in engagement with a wedge which is movable therein, thereby achieving a compensation for misalignments.

Abstract: An apparatus for applying hot melt glue to back surfaces of book blocks, wherein these back surfaces are distributed in fan-like fashion, by means of glueing rollers, two of which are consecutively arranged conically-shaped rollers which are adjustable in their angular setting, whereby the tearing out resistance of the sheet edges is increased. Each glueing roller is supported in an individual glue pan which may be separately pivoted and adjusted in its height. By adjusting of angular setting of the aforementioned two rollers the vertical position of each glue pan may be corrected. This will ensure a uniform and sufficiently large glue layer over the back surfaces of the blocks throughout the entire process of glueing.

Abstract: A jogger for lateral alignment of sheets in a sheet-delivering device of a sheet-processing machine, such as a printing machine, has displaceable diaphragm; resiliently yieldable member; and a pusher member connected with the diaphragm and the resiliently yieldable member so that upon displacement of the diaphragm in one direction, the pusher member first moves toward a sheet-delivery device against the force of the resiliently yieldable member and then tilts after contacting a sheet stack in the sheet-delivery device, wherein the diaphragm is elastic and pneumatically impingeable to perform the displacement, so that the pusher member automatically adjusts upon the sheet stack.

Abstract: A device for positioning sheets in a stack in a sheet-processing machine includes a number of stops positioned at the front edges of the sheets being stacked for aligning the front edges of the sheets, and two joggers located at lateral sides of the stack. Each jogger includes an oscillating plate having a horizontal arm and a vertical arm which extends towards the upper end of the stack. The plate is provided with a drive imparting the oscillating movement to the vertical arm thereof.

Abstract: A blowing arrangement for a sheet-delivering device of a sheet-processing machine has a plurality of blowing nozzles arranged to be located above a sheet-delivering device and spaced from one another in a direction which is transverse to the sheet-transportation direction and at an angle to the sheet-transportation plane so as to blow air contrary to the sheet-transportation direction and between a sheet placed in the sheet stack and a sheet transported to the latter, wherein the blowing nozzles are also arranged at diverging angles to the sheet-transportation direction as considered in the sheet-transportation plane.

Abstract: A printing press includes an impression cylinder formed with axially directed channels for sheet-clamping means, a radiant dryer arranged above the impression cylinder to radiate heat on the printed sheet, a screening hood mechanism tiltably mounted for movement between an inactive position in which the sheet is exposed to heat rays from the dryer and a screening position; the driving motor is connected to the power source by two parallel power supply circuits each including a separate switch, one of the switches being actuated by a relay which in turn is actuated by series-connected contacts closed respectively when the dryer is in operation, when the driving motor is disconnected, when the printing machine stops, and when the channel for the clamping means on the impression cylinder is not facing the dryer.

Abstract: The liquid-distributing roller assembly for printing machines is composed of two opposite pairs of guiding tracks secured to the machine walls. One track supports for rectilinear movement a two-stage transmission gear unit in which one end of the shaft is supported for rotation; the other end of the shaft is supported for rotation and for a rectilinear movement in the opposite track. The shaft supports for rotation and for an axial displacement a liquid distributing roller which at one end is connected to a first spur gear rotatable on one end of the shaft and being in permanent engagement with an elongated transmission gear. The latter is also in permanent engagement with a second spur gear which is connected for joint rotation to the shaft. The other end of the shaft supports a cam which engages a cam follower connected to the distributing roller so that as soon as the latter is rotated an axial reciprocating movement is generated by the cam mechanism.