Abstract: A screen printing machine with one or more printing units each of which has a screen and at least one squeegee above a portion of the path for a movable web of paper or the like. The positions of the screens are adjustable by carriages which support the frames for the screens and receive motion from sets of motors which respond to signals from a computer. The latter receives signals from cameras which are adjacent the path of movement of the web and monitor alignment marks (if any) on the web and/or the position of printed matter on the web.

Abstract: A sheet drying apparatus wherein the horizontal upper reach of an endless foraminous conveyer transports a series of sheets to be dried between a main suction chamber below and a plenum chamber above the upper reach. The drying station between the two chambers is flanked by two additional suction chambers which extend transversely of the direction of advancement of sheets and serve to attract the sheets to the upper side of the upper reach of the conveyor. A blower is provided to draw air from the main suction chamber and to admit the withdrawn air into channels for admission into the plenum chamber. The sheets are directly or indirectly heated by a stationary heating device between the main plenum chamber and the upper reach of the conveyor, by one or more heating elements in the plenum chamber, by heating elements in the main suction chamber and by heating elements in the channels.

Abstract: A flat bed screen printing machine wherein the material to be printed is movable in stepwise fashion with or relative to an assembly including a flat bed at one side and a screen at the opposite side of the path for the material. The material moves with the assembly during application of paste and moves slowly relative to the assembly while the latter moves rearwardly to its starting position. The slow movement of the material serves to move its passer marks to optimum positions with reference to a detector. One or more squeegees are adjacent the screen. The squeegee(s) are mounted on the assembly for movement relative to the screen.

Abstract: A flat bed screen printing machine wherein the material to be printed is movable in stepwise fashion with or relative to an assembly including a flat bed at one side and a screen at the opposite side of the path for the material. The material moves with the assembly during application of paste and moves slowly relative to the assembly while the latter moves rearwardly to its starting position. The slow movement of the material serves to move its passer marks to optimum positions with reference to a detector. One or more stationary squeegees are adjacent the screen. The screen can move relative to the squeegee(s).

Abstract: A hydromechanical drive wherein a prime mover drives an input shaft which, in turn, can drive a coaxial output shaft by way of a clutch or transmission having one or more axial piston pumps. The pressure and/or rate of fluid flow in the pump or pumps is adjustable by one or more valves or by one or more tiltable wobble plates in response to signals from one or more adjusting devices which receive signals from an electronic control circuit. The latter further receives signals from tachometer generators which monitor the RPM of the input and output shafts, from a gauge which monitors the pressure in the pump or pumps, from the valve or valves, or from the adjusting devices(s) for the tiltable wobble plate(s).

Abstract: A printing method which is practiced with a flat bed screen printing machine wherein the material to be printed is intermittently movable with or relative to an assembly including a flat bed at one side and a screen at the opposite side of the path for the material. The material moves with the assembly during application of paste and moves slowly relative to the assembly while the latter moves rearwardly to its starting position. The slow movement of the material serves to move its passer marks to optimum positions with reference to a detector. One or more squeegees are adjacent the screen. The screen can move relative to the squeegee(s), or the squeegee(s) can be mounted on the assembly for movement relative to the screen.

Abstract: A differential gearing wherein a hydrostatic motor is flanked by two mechanical transmissions. The motor is an axial piston motor, a radial piston motor or a gear motor, and its main driving member rotates the input element of one of the transmissions. The rotary housing of the motor transmits torque to the input element of the other transmission. The motor and the transmissions can be installed in a common case, in discrete cases or directly in the hubs of the respective driven wheels.