摘要:
Device for conveying single sheets or a shingled sheet stream in a feeder region of a sheet-processing machine of a conveyor table equipped with at least one endless conveyor belt, and at least two rotatably supported deflection rollers over which the conveyor belt is guided, the conveyor belt being disposed so as to convey the sheets in a region between a sheet pile and front stops, wherefrom the sheets are transferable to a further processing location of the sheet-processing machine, includes a motor for driving the conveyor belt uncoupled from the sheet-processing machine, and a computer and control device for triggering the motor with a predetermined velocity profile exhibiting a velocity change as a function of an angular position of the sheet-processing machine; and method of operating the sheet-conveying device.
摘要:
Drive for a printing press having a plurality of printing units having plate cylinders, elements for transporting stock, and elements which do not transport stock includes a gear-transmission device for interconnecting the printing units, a plurality of motors, respectively, coupled at various locations to the gear-transmission device, a device for controlling and regulating delivered power connected to the motors, and a device for feeding signals regarding rotational speed in the gear-transmission device to the control and regulating device, the gear-transmission device including a gear-transmission unit for driving all of the stock-transporting cylinders and the plate cylinders; at least one of the motors being connected to the gear-transmission unit; at least one sensor for detecting motion variables in the gear-transmission unit; at least one drive for driving the elements of the printing press which do not transport stock; at least another sensor for detecting motion variables in the drive for driving the elements which do not transport stock; all of the sensors being connected to the control and regulating device.
摘要:
A drive system for an oscillating gripper of a sheet-fed printing machine has a main drive train and a controlled drive. The pregripper is mechanically coupled to the main drive train. The controlled drive supplies energy required to drive the pregripper in accordance with a position of the pregripper. The controlled drive at least approximately meets the discontinuous energy requirement of the pregripper.
摘要:
A device for transporting to a printing press, sheets singly separated from a sheet pile, includes an electromagnetic linear drive mechanism; and a method of operation of the device.
摘要:
A measuring apparatus for scanning moving, preferably sheet-like, printing materials in a printing material-processing machine, such as a press for processing sheet material. The apparatus has a measuring device which can be moved, at least in the transport direction of the printing materials. The measuring apparatus is set up in such a way that, during a measuring operation, the measuring device is moved over the moving printing material in the transport direction of the printing material with a differential speed relative to the transport speed of the printing material.
摘要:
Method and device for measuring a dielectric response of an electrical insulating system, wherein a first measurement result is determined by a frequency domain method and a second measurement result is determined by a time domain method, whereupon the first measurement result and the second measurement result are combined to form an overall measurement result as the dielectric response. Standard types of measurement methods, for example the FDS and PDC methods, may be used as measurement methods for the frequency domain and the time domain.
摘要:
Device for controlling a pile-lifting device of a sheet-processing machine has a drive for performing correction movements in order to keep the upper side of the pile within a range of heights, a device for scanning the position of an upper side of the pile so as to determine whether the upper side of the pile has reached a predetermined height or not, and a control device for controlling the correction movements in accordance with the result of the scanning of the position of the upper side of the pile, and includes device for determining a quantity dependent upon the correction movement.
摘要:
A printing press includes at least one printing unit having a cylinder and a cover covering the cylinder. Actuators are associated with the cylinder for changing a geometry of the cover in axial and/or circumferential direction of the cylinder. Positioning electronics are connected to the actuators and a printing press machine control system is connected to the positioning electronics. An image inspection device is connected to the printing press machine control system at least for geometric measurement of printed printing materials. A printing press computer processes measured results from the image inspection device for carrying out a desired/actual value comparison and for driving the actuators to minimize determined deviations, in the event that deviations are determined.
摘要:
A drive for a rotary printing press has a clutch with improved reliability in the main drive gear train. The drive has a gearwheel mechanism for transmitting a rotational movement of transfer drums during delivery of a printing material. The gearwheel mechanism includes a gearwheel pair with a driving gearwheel and a driven gearwheel and the driven gearwheel, which is arranged coaxially with respect to the driving gearwheel, is coupled during delivery to a shaft journal of a transfer drum. A clutch is provided for selectively producing and interrupting the transmission of torque between the driving gearwheel and the driven gearwheel. At least one motor is provided for feeding a torque into the gearwheel mechanism. A stepup gear mechanism is arranged in the torque flow between a clutch half of the clutch and a gearwheel.
摘要:
In an analytic process using porous silicon, a substance is detected or its concentration in a fluid is determined based on the change in the optical property of porous silicon as a function of the refractive index of the substance present in the pores of the porous silicon, or of the fluid containing the substance. An analytic device for detecting a substance or for determining the concentration of a substance in a fluid with the use of porous silicon comprises a component at least partly consisting of porous silicon, the optical property of which is dependent upon the refractive index of the substance or of the fluid containing the substance, whereby a change in the optical property of the porous silicon is measurable to indicate detection of the substance or to determine the concentration of such substance in the pores of the porous silicon.