Abstract: A synchronous mechanism for a chair, such as an office chair, including a base unit, a seat support arranged above and moveably on the base unit, a backrest support arranged on the base unit so as to be capable of being pivoted about a pivot axis oriented horizontally and in transverse direction of the chair, and a prestressing device. The prestressing device exerts a prestressing force acting upwards on the seat support and forwards on the backrest support. The seat support is connected to the base unit via a coupling mechanism providing movability of the seat support relative to the base unit. The coupling mechanism is arranged to positively control the movements of the seat support relative to the base unit such that the seat support can be moved back and forth on its own between positions which are parallel to one another when the backrest support is fixed.

Abstract: A method and an apparatus for feeding printing plates to a plate cylinder of a printing press, load the printing plate in the vicinity of its front edge with a curvature which extends convexly with regard to the plate cylinder axis.

Abstract: A synchronous mechanism for a chair, such as an office chair, including a base unit, a seat support arranged above and moveably on the base unit, a backrest support arranged on the base unit so as to be capable of being pivoted about a pivot axis oriented horizontally and in transverse direction of the chair, and a prestressing device. The prestressing device exerts a prestressing force acting upwards on the seat support and forwards on the backrest support. The seat support is connected to the base unit via a coupling mechanism providing movability of the seat support relative to the base unit. The coupling mechanism is arranged to positively control the movements of the seat support relative to the base unit such that the seat support can be moved back and forth on its own between positions which are parallel to one another when the backrest support is fixed.

Abstract: A method and an apparatus for feeding printing plates to a plate cylinder of a printing press, load the printing plate in the vicinity of its front edge with a curvature which extends convexly with regard to the plate cylinder axis.

Abstract: A method and an apparatus for coupling or uncoupling a cylinder, in particular a plate or blanket cylinder, to or from a gear train of a printing press or for coupling and uncoupling the cylinder to and from an auxiliary drive, for example for service work or during changeover processes, includes firstly accelerating the auxiliary drive to a predefined rotational speed, then coupling the auxiliary drive to the cylinder and then uncoupling the cylinder from the main drive. A sheetfed rotary printing press having the apparatus is also provided.

Abstract: A sheet-processing machine includes a conveyor for transporting processed sheets at a processing speed and for releasing the sheets for braking to a depositing speed. A braking element serves for the braking of the released sheets to the depositing speed. A drive is provided for the braking element, and a drive connection is provided for connecting the drive to the braking element. Further included are an overrunning clutch in the drive connection, and a brake for retarding the braking element.

Abstract: A displacement device for a machine for processing flat printing materials includes a slide displaceable along a displacement path in and counter to a thrust direction, and being divided along the thrust direction into two slide parts. A drag joint forms a mutual connection between the slide parts. The drag joint has a joint axis extending perpendicularly to the displacement path. A machine for processing flat printing materials, such as a sheet-processing rotary printing press, is provided with the displacement device.

Abstract: A drawing-device mechanism includes an endless drawing device and two wheels, around which the drawing device is partially looped. One wheel has a locally fixed axis of rotation and the other wheel is adjustable within an adjustment range. A drawing-device tensioner produces pretensioning. During an adjustment of the second wheel, with an increase in the center-to-center distance in a first case and with a reduction in the center-to-center distance in a second case, the drawing-device pretensioning remains approximately unchanged as a result of a reduction in the looping of the drawing device around the drawing-device tensioner in the first case and an increase in the looping of the drawing device around the drawing-device tensioner in the second case, absent any change in location of the drawing-device tensioner. A machine such as a sheet-processing rotary printing machine has the drawing-device mechanism.

Abstract: A sheet-processing machine includes a conveyor for transporting processed sheets at a processing speed and for releasing the sheets for braking to a depositing speed. A braking element serves for the braking of the released sheets to the depositing speed. A drive is provided for the braking element, and a drive connection is provided for connecting the drive to the braking element. Further included are an overrunning clutch in the drive connection, and a brake for retarding the braking element.

Abstract: A delivery for a machine processing flat printing materials includes a suction belt conveyer having conveying runs forming a support surface. To remove rejects or proof sheets as required, the delivery transports the materials along a transport path over a stack that is otherwise built up and transfers the sheets to the support surface. The physical position of the support surface can be varied while maintaining its generatrix. Therefore, the support surface can be adjusted in each print job to a working position in which secured transfer of removed printing materials to the suction belt conveyer is ensured. In a particular configuration, a latching device is provided that permits the conveying runs to escape from their working position in the event of a jam. Preferably, the latching device has a latching pin and a latching recess.

Abstract: The delivery for a sheet-processing machine, such as a sheet-fed rotary printing press, has several braking devices which are movable transverse to a sheet transport direction. The delivery also has a sheet guiding elements that respectively cover the interspaces between adjacent braking devices at a level of the top edges. The sheet guiding devices are formed from a flexible tape material. The length of the tape transverse to the direction of sheet transport and seen from above is adjustable to the spacing between the adjacent braking devices.

Abstract: A displacement device for a machine for processing flat printing materials includes a slide displaceable along a displacement path in and counter to a thrust direction, and being divided along the thrust direction into two slide parts. A drag joint forms a mutual connection between the slide parts. The drag joint has a joint axis extending perpendicularly to the displacement path. A machine for processing flat printing materials, such as a sheet-processing rotary printing press, is provided with the displacement device.

Abstract: A drawing-device mechanism includes an endless drawing device and two wheels, around which the drawing device is partially looped. One wheel has a locally fixed axis of rotation and the other wheel is adjustable within an adjustment range. A drawing-device tensioner produces pretensioning. During an adjustment of the second wheel, with an increase in the center-to-center distance in a first case and with a reduction in the center-to-center distance in a second case, the drawing-device pretensioning remains approximately unchanged as a result of a reduction in the looping of the drawing device around the drawing-device tensioner in the first case and an increase in the looping of the drawing device around the drawing-device tensioner in the second case, absent any change in location of the drawing-device tensioner. A machine such as a sheet-processing rotary printing machine has the drawing-device mechanism.

Abstract: A delivery for a machine processing flat printing materials includes a suction belt conveyer having conveying runs forming a support surface. To remove rejects or proof sheets as required, the delivery transports the materials along a transport path over a stack that is otherwise built up and transfers the sheets to the support surface. The physical position of the support surface can be varied while maintaining its generatrix. Therefore, the support surface can be adjusted in each print job to a working position in which secured transfer of removed printing materials to the suction belt conveyer is ensured. In a particular configuration, a latching device is provided that permits the conveying runs to escape from their working position in the event of a jam. Preferably, the latching device has a latching pin and a latching recess.

Abstract: An apparatus for transmitting a torque from a drive shaft for a component of a printing machine to a hollow body surrounding the drive shaft, includes a coupling configuration. The coupling configuration is formed through the use of driver elements, engages in a longitudinally displaceable manner on the drive shaft and couples the latter to the hollow body. In order to use such an apparatus for torques which are not constant, according to a first variant, the coupling configuration includes a coupling ring surrounding the drive shaft, a first subgroup of driver elements coupling the drive shaft to the coupling ring, and a second subgroup of driver elements coupling the coupling ring to the hollow body. According to a second variant, the driver elements couple the drive shaft directly to the hollow body and are resilient in an at least substantially radial direction and in the circumferential direction of the drive shaft, relative to an axis of rotation of the drive shaft.

Abstract: The delivery for a sheet-processing machine, such as a sheet-fed rotary printing press, has several braking devices which are movable transverse to a sheet transport direction. The delivery also has a sheet guiding elements that respectively cover the interspaces between adjacent braking devices at a level of the top edges. The sheet guiding devices are formed from a flexible tape material. The length of the tape transverse to the direction of sheet transport and seen from above is adjustable to the spacing between the adjacent braking devices.

Abstract: A method and devices for cleaning an inking system of a printing machine in which a further drive of the inking system (1) is used for the reverse transport of the ink into the ink fountain (4), while the clock-pulse movement of vibrator roller (5) between ductor roller (6) and distributor roller (7) continues to take place, and that only after this reverse transport of the ink is the customary cleaning of the inking system (1) carried out.

Abstract: A transmission device for a printing machine having an endless transmission element, and rotating bodies around which the transmission element is wrapped, includes a tensioning device for tautening the transmission element, and an actuating device for displacing a first one of the rotating bodies parallel to the axis of rotation thereof, the tensioning device being formed by the actuating device, the actuating device having a tensioning shaft operatively connected to the first rotating body, the tensioning shaft, when rotated about a longitudinal axis thereof, causing a lateral displacement of a center-of-mass line thereof.

Abstract: Method of stabilizing the temperature of a duct roller in an inking unit of a printing press, the duct roller being formed with an interior space through which a temperature-controlled fluid flows, includes feeding oil from an oil circulation system of the printing press through the interior space of the duct roller and back to the oil circulation system for stabilizing the temperature of the duct roller; and device for performing the method.

Abstract: A device for effecting an impression throw-on and throw-off of a cylinder in a rotary printing press, the cylinder having a shaft supported in swivellably disposed bearing levers, includes respective guides located at respective ends of the shaft for setting the shaft in rotation.