Abstract: A cleaning device for printing machine cylinders and bearings (2, 60) for this for the rotatable mounting of a cloth spindle (4, 92) for a cleaning cloth. At least one of the bearings (2, 60) has a bearing bush (14, 64) which is provided with an external thread (16, 66) and which can therefore be screwed into an internal thread (17, 67) of a side part (20, 70).

Abstract: In a device for remoistening a preferably freshly printed paper web with spray jets, through which moisturising agents can be admitted, arrayed above and below the said paper web, and spray chambers containing the same, a reliable ventilation can be achieved in the spray chambers, in that each spray chamber is arrayed in a dedicated suction chamber, which can be sucked out by means of at least one dedicated extraction fan.

Abstract: A cleaning apparatus for a surface, particularly for a surface in the graphics industry and more particularly for the surface of a cylinder used in the graphics industry. A pressing element has a cleaning cloth thereover. The pressing element is movable toward and away from the surface. A pressurizable pressure chamber which when pressurized acts on the pressing element to move the cloth to the surface. A pneumatic circuit feeds compressed air to the pressure chamber and vents the pressure chamber. The circuit includes a compressed air storage chamber which can be alternatively connected to the pressure chamber to pressurize the pressure chamber or to a compressed air source to refill the chamber with compressed air. The volume of the storage chamber and the pressure therein are higher than that of the pressure needed in the pressure chamber for rapid refilling of the pressure chamber.

Abstract: A temperature-control apparatus for a printing machine includes a closed, temperature-control fluid circuit including a pump with a suction and pressure side, a fluid feed line feeding temperature-control fluid from a fluid source to the suction side of the pump and a fluid return line on the suction side of the pump between the pump and the load. Temperature-control fluid from the source may be pumped by the pump through the circuit to the load and recycled to the suction side of the pump. A valve is provided in the return line to the source and is controlled by a temperature sensor that senses the temperature in the circuit and selectively directs fluid to the circuit or out of the circuit and back to the source dependent upon the sensed temperature.

Abstract: In a device for conditioning a preferably freshly printed paper web (2) with a dryer (1) and a remoistening device, wherein the dryer (1) exhibits a heating zone (3), a temperature maintenance zone (4) and a cooling zone (5) and the remoistening device exhibits spray jets (10), arrayed above and below the transport surface of the said paper web (2), through which moisturizing agents can be admitted, and spray chambers (9) containing the same, a particularly compact form of construction is achieved, in that the cooling zone (5) of the dryer (1) contains a moisturizing device (8) for the purpose of remoistening and cooling the said paper web (2).

Abstract: A temperature-control apparatus for a printing machine: a closed, temperature-control fluid circuit including a pump with a suction and pressure side, a fluid feed line feeding temperature-controlled fluid from a fluid source to the suction side of the pump and a fluid return line between the pressure side of the pump and the load. Temperature-control fluid from the source is pumped by the pump through the fluid circuit to the load and is recycled to the suction side of the pump. A valve is connected between the pressure side of the pump and a return line to the source and is controlled by a temperature sensor that senses the temperature in the circuit and selectively directs fluid from the source through the circuit or out of the circuit and back to the source dependent upon the sensed temperature in the circuit. There may be a heater in the circuit.

Abstract: The wetting-agent solution proposed contains of water and at least one organic solvent miscible with water. The speed of sound in the solution is measured and, from the value obtained, a control signal is generated to keep the composition of the solution constant.

Abstract: The present invention relates to a device to prevent damage to printing groups of web-fed rotary presses that print webs fed by a cylinder which is placed on a reel changer. A fault detector is provided that has a deflection device next to both web edges. It can create a deflective force transverse to the web plane transport, which can be overcome by the tension of the web during normal operation. A monitor is also provided that detects changes. With the aid of this device, damage to printing groups can be prevented (especially arising from defects occurring during reel exchange) by locating the fault detection device in front of the first printing group of the web-fed rotary press, and each of the two monitors of the fault detector is designed as an optical sensor that emits a signal which depends on shading by the web, and its optical axis is tilted in the lengthwise direction of the web in relation to the direction of the deflection force that is essentially perpendicular to the transport plane of the web.

Abstract: In connection with a device for catching a torn web of printed material with a roller actuated by a drive-mechanism, the roller is arranged within an area where the tearing of webs is likely to happen, preferably behind the last roller unit of a rotational roller printing machine, and with a free turnable rotor arrangement which is pressed against the roller and is arranged on a movable carrier in the machine trestle. The carrier can be actuated by an actuating device if the web tears. A simple and robust construction a well as economical operation can be assured in that the actuating device contains at least one pneumatic cylinder which is highly pressurized to move the rotor arrangement towards the roller and which presses the rotor arrangement against the roller at reduced pressure.

Abstract: In carrying through quality management while printing a web on a rotational roller printing machine high accuracy is obtained by a periodic returning, simultaneous measuring of color density and spectral distribution in at least one selected point of the periodically returning printing pattern; the continuous registration and storing of the measuring results over the entire duration of the production process; an analysis of the measured results by predetermined criteria at least at the end of production. For doing so a device is provided with at least one adjustable measuring head spanning the width of the printed web, containing a spectrometer and a light source; the measuring head can be activated depending on the product by means of an encoder assigned to the rotational roller printing machine. Further, a control device is provided that can continuously record the measuring signals of each measuring head.

Abstract: A control device for an adjustable fluid jet having a piston arrangement with a through bore communicating with at least one through recess of an elastic element. A thrust bolt enters a jet tube arranged in a fixed manner at the jet head. A following control piston limits a pressure chamber supplied with the pressure medium on the other side of the thrust bolt. A sealing plug projects from the opposite end of the thrust bolt and exhibits a smaller diameter and enters in a sealing manner into an opening that departs from the pressure chamber and is supplied with the fluid to be processed.

Abstract: In a remoistening device for remoistening a freshly printed and dried web of printed material has a housing through which the web of printed material runs. The remoistening device is a disposed downstream from a dryer, preferably in the area between the dryer and a cooling device. The remoistening device is provided with an inlet and outlet slot, in which spray nozzles, which are arranged above and underneath the conveyance plane of the web of printed material and which can be supplied with a moistening agent, are provided. It is possible to achieve a high degree of freedom from trouble and soiling is achieved in that drip catchers are arranged at the lower edges of the walls of the upper housing area of the remoistening device which cross an conveyance plane of the web of printed material.

Abstract: A device for cleaning the working surfaces of a printing press, in particular a blanket washing plant, with a plurality of washing units, preferably designed as washing bars, controlled by a central processing unit and provided with actuators and sensors is cost-effectively made safer, easier to in stall and to diagnose by a design characterised in that the central processing unit and each subset of washing units comprising at least one washing unit is assigned a communications module located at least near the washing unit, and in that all communications modules are connected to a transmission channel, via which signals can be transmitted and received.