Abstract: A housing has an inner area defined by end walls, side walls, a top wall, and a bottom wall having a flat inner surface. Inlet and outlet ports open through the flat inner surface. The inlet port is arranged to be connected to a supply source of pneumatic pressure and the outlet ports are arranged to be connected to an actuator. A control member in the housing has a pair of recesses facing the inner surface in association with the inlet and outlet ports. The control member is suspended by a pair of leaf springs which allow a high response of the control member with a low signal pressure. The leaf springs are engineered and tested precisely considering the compression or columnar force acting endwise thereon as a result of the working pressure in the valve. At the same time the leaf springs have lateral deflection sufficient for operation of the control member 54 without buckling.

Abstract: A guide frame has overlying support on a base frame and supports a pair of spaced, parallel guide rollers arranged with their axes extending across the line of travel of a moving web. These rollers receive the traveling web over the surface thereof from an entering span at one of the rollers and an exiting span at the other roller, the span between the rollers comprising a guide movement span. A fixed offset pivot supports the guide frame pivotally on the base frame in an area adjacent to the entering span of the rollers. This fixed pivot support is rigid in a direction parallel with the pivot axis but has some flexibility in the direction of travel of the guide movement span of the web. A movable pivot support supports the guide frame on the base frame in an area adjacent the exiting span of the rollers.