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 device to produce a fluid jet (14), especially to apply glue (12) and/or a soft fluid (13) onto a web with a nozzle head (5) which bears a nozzle (6) provided with a discharge port (34) arranged at one end of a conduit (33) loaded with the fluid (12, 13), control of the fluid jet cross-section is achieved in a simple and low-cost, in that an elastic element (18) is provided for in the area of the discharge port (34), which features a through opening (17) communicating with the conduit (33) and which (18) is mounted between two compression elements (19, 20) which can shift in relation to each other.

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.

Abstract: An apparatus and method for the monitoring of a web in a machine processing such web including at least one sensor positioned along the path of the web. The sensor includes a transmitter for transmitting a monitoring beam to the web and a receiver for receiving part of the monitoring beam returned from the web. The receiver is connected to a signal processor for measuring the interval between the transmitting and the receiving. The signal processor produces a control pulse to the machine when the interval exceeds a predetermined tolerated range. The signal processor is a computer programmed such that the tolerated range is set larger prior to the arrival of the signal than after the arrival.

Abstract: In the case of an apparatus for the contact-free application of a liquid strip, more particularly a strip of glue, on a moving web of material, comprising at least one application head, which is provided with at least one nozzle arranged at a distance from the web of material and a valve adapted to put the nozzle into and out of operation and adapted to be operated in accordance with the desired pattern of application, the aim of the invention is to provide such an improvement using simple and low-price means that despite the contact-free application of liquid high accuracy becomes possible. This accomplished by a modification such that the timing of the valve is modified to depart from the basic values, which are dependent on the application pattern, in accordance with a correction value which is a function of the speed of the web of material and at least the distance of the web from the nozzle.