Abstract: The drive for the multicolor rotary press has a main drive shaft, a connected synchronized gear train which extends substantially parallel to the drive shaft and which connects the press mechanisms with each other and a torsion spring-rod which couples the main drive shaft and the synchronized gear train. For coupling the main drive shaft with the synchronized gear train the torsion spring-rod is mounted on an axle journal of a press cylinder. To provide a drive for operation of the press at several different operating speeds a force-locking or frictionally-engaging coupling clutch is mounted on bevel gear shafts located between the press cylinder of one press mechanism drivable by a torsion spring-rod and another press cylinder of an adjacent press mechanism carrying a transversely moving linkage.

Abstract: The apparatus for separating and stacking stacked sheets is used for a pneumatic sheet separation and conveying mechanism in a sheet feeder of sheet processing machines. In the apparatus of the invention the blowing under of a sheet separated from the stack in the first motion stage of the conveying suction mechanism is maintained and a reliable separation of the sheets is guaranteed by an operational separation of a second type of conveying suction device located between the separating suction devices at the sheet edge remote from the first conveying suction devices. The second conveying suction device separate from the first conveying suction devices is associated with a second separating suction device operating according to the pressure difference principle.

Abstract: A printing mechanism and a distributing roller unit thereof has an inking roller, a dampening roller, a distributing roller located between the inking roller and dampening roller and movable between at least two positions in which it becomes alternately associated with the inking roller and the dampening roller and axially displaceable relative to the inking roller and the dampening roller, respectively, and elements for moving the distributing roller between the two positions and axially displacing the same.

Abstract: A safety device for control of a roller rotary printing machine includes a plurality of sensors positioned either before or behind a web advancing device for recognizing tears or other damages in a region of the edges of the advancing web, an evaluation device having an input connected to the sensors and an output at which an impulse-like control signal is issued, and a switching device connected to the output of the evaluation device and arranged in a path of the web of the printing machine. The switching device is adapted for an abrupt lowering of a web tension upon receiving the signal from the evaluation device.

Abstract: A drive for a printing machine with a plurality of printing mechanisms has a closed gear train arranged to connect the printing mechanisms with each other, a drive train extending parallel to the gear train and elastically connected with the latter by at least two power input points, a torsion spring arranged to be located in a trunnion of each of the printing cylinders, at a drive side of the latter, a bush arranged to be mounted in the trunnion of each of the printing mechanisms, and an axially displaceable driver arranged in the bush and form-lockingly engaging the torsion spring.

Abstract: A multi-color printing machine comprises a print carrier supplying system including a print carrier supply unit, a print carrier transporting unit and a print carrier discharge unit, and a printing image supplying including at least two printing mechanisms each having a plate cylinder and an offset cyinder, the offset cylinders being arranged in contact with one another and of the offset cylinder being arranged in contact with the print carrier transporting unit, the print carrier transporting unit being formed as a central printing cylinder which cooperates with the print carrier withdrawal unit and with the print carrier supply unit and is provided with at least one gripper element, the printing image supplying system also including an endless band-shaped printing image collecting element associated with at least first and last of the offset cylinders of first and last of the printing mechanisms through at least one connecting cylinder.

Abstract: A stepper drive for an ink doctor roller of a rotary printing machine is power supplied by incremental voltages of uniform magnitude derived from the rotary speed of the machine. The magnitude of an ink metering step of the doctor roller is selected in an evaluation unit which determines the number of incremental voltages supplied to the stepper drive. At the same time, the rate of the selected metering steps is selected in dependency on the rotary speed of the machine by a rate selection means.

Abstract: In a method for controlling ink density, control deviations of ink density are alternatively utilized for dosing moisture agent amounts and dosing printing ink amounts. The dosing of moisture agent amounts is carried out by the inquiry process and this process is controlled by the comparison of ink densities on control strips with given reference values.

Abstract: A rotational stitching apparatus with separately driven stitching head is used for stitching folded sheets by wire and thread clamping, thread sealing, and loop thread stitching. The drive system permits autarkic stitching heads to be optionally replaced and to be adjusted in correspondence with the product assortment. Each stitching head has a stitching head driveshaft, by means of which it is connected to the stitching cylinder driveshaft 1 or the cylinder axle 37, preferably by way of a gear or the toothed belt. Implementation of various stitching technologies is made possible by additional apparatus disposed peripherally to the stitching cylinder circumference.

Abstract: A cylinder stitching device for binding single sheets for thread sealing, modified French sewing, as well as for wire stitching, includes a stitching cylinder that is controlled by central cams. The stitching cylinder is equipped with stitching heads which can be automatically lubricated, are adjustable, and can optionally be replaced. The production arrangement, attached peripherally to the circumference of the stitching cylinder, is likewise replaceable and automated, so that, by use of the adjusting devices provided for the cylinder stitching device, rapid adaptation to changing processing material as well as high productivity are guaranteed.

Abstract: A device for treating internal surfaces of cylindrical objects by rubbing includes a plurality of rubbing pins each provided with two pin clamping devices one of which is displaceable relative to the other so that each pin can be adjusted relative to a workpiece.

Abstract: A vane wheel laying out unit for sheet-by-sheet laying out of printing products for high speed roller rotary printing machines comprises a vane wheel including a shaft and a plurality of thin vane star discs fixedly mounted on the shaft in a lamellar fashion at a distance from one another, a band supply unit associated with the vane wheel for supplying printing products to the latter, a plurality of stationary blowing air nozzles each associated with a respective one of the vane star discs of the vane wheel so that a direction and an intensity of blowing air stream from the blowing air nozzles influence a friction between a printing product falling in one vane and an outer side of another vane which is arranged after the one vane, the vane star discs, the band supply unit and the blowing air nozzles are arranged in their position relative to one another so that the printing product before an ejection of its rear edge from the band supply unit is blockable by the one vane which receives the printing product fr

Abstract: A device for engaging and disengaging of blanket cylinders in a printing assembly including two such blanket cylinders and two plate cylinders which are external relative to the blanket cylinder is disclosed. The device comprises a drive and a gear transmission device cooperating with the drive to impart an angular adjustment movement to each of the blanket cylinders. Each blanket cylinder includes an inner and an outer eccentric sleeve each provided with a toothed segment and movable by the gear transmission device in a predetermined direction to engage or disengage the blanket cylinders.

Abstract: To guarantee an exact engagement of toothed flanks in the driving gear train of a multi-color sheet-fed rotary printing machine, the gears in the train pertaining to an intermediate printing unit of the machine are power supplied from a driving member which transmit a three-fold power portion in comparison to uniform power portions transmitted by driving elements assigned to the remaining printing units.

Abstract: A device for sealing surfaces defined between a collar of a motor shaft and a motor cover comprises a pre-stressed sealing ring mounted at the surfaces which extend at right angles relative to each other, a viscous elastic element for prestressing the sealing ring, and a guide ring positioned between the elastic element and the sealing ring. The sealing ring is positioned between the surfaces to be sealed and is pressed by the guide ring which is displaceable by a pressure medium.

Abstract: Apparatus for treating a thermoplastic resin is made up of a feed barrel supplied with the thermoplastic resin, a slit barrel for discharging a liquid component of the resin, a press-in barrel into which a polymer is admitted under pressure, and a vent barrel having a vent opening for discharging vaporized substance generated by the thermoplastic resin and the polymer. These barrels are serially interconnected to from a cylinder which contains a screw for kneading a mixture of the resin and the polymer. The kneaded mixture is extruded as a strand.

Abstract: A device for controlling an unwinding of a continually fed material web in a printing machine comprises a web storage to which the web is loaded from the unwinding roller and which includes a housing-fixed roller group and a movable roller group. An inlet and an outlet rollers of the housing-fixed roller group are rotation-angle coupled with each other. The web storage serves as a control device for controlling the peripheral speed of the unwinding roller in dependence on the speed of the draw-in device.

Abstract: A method of generating a sampling signal succesion for use in a control system utilizing pulse-length modulated control signals, especially for controlling the tension or position of a continuously advancing web, such as in rotary printing machines, includes sampling and storing an error signal after a time interval having a duration approximately equal to an equalization time of the controlled system and commencing with the termination of a preceding adjustment step while the control system is out of operation, generating a binary signal of a length in time which is proportional to the error signal, sampling and storing a sum of the error signal and a deviation error signal during an additional time interval considerably shorter than the time constant of the controlled system, and extending the binary signal proportionally to the deviation control signal.

Abstract: A series of equidistant measuring heads is arranged at a uniform distance above a surface to be measured. Each head includes a light source emitting light through a narrow exit opening, and two light sensors arranged adjacent the opposite narrow sides of each opening. The light input characteristic of respective sensors is such that light reflected from the measured surface section is detected with a sensitivity which is inversely proportional to the different intensity of illumination of central and marginal points of the measured section.