Abstract: A supporting framework for a control cabinet is configured of side frames and cross-beams. The side frames are made of whereby profile elements having a rectangular cross-sectional. The cross-beams possess a square cross-sectional shape that is beveled on one side, and includes two sections at right angles to each other and dimensioned to be of a length corresponding to the longer rectangular side of the cross-sectional shape of the side frame element. The supporting framework is both stable and inexpensive. The cabinets can be attached to one another.

Abstract: A pressure-limiting valve comprises a cylindrical actuator piston guided displaceably in a bore and held under the pressure of a spring in the closure position of the valve. Longitudinally-directed throughflow passages are formed in the actuator piston on the pressure-loaded end and are arranged concentrically with respect to the central axis and open into an annular groove extending around and in the circumferential surface of the actuator piston. This groove is sealed off by a gasket mounted in the bore wall. When the set pressure predetermined by the closure spring is exceeded, the actuator piston travels with the gasket over the annular groove so that the pressure medium can flow away through the outlet opening.

Abstract: The bag closing apparatus includes a horizontal plate for supporting a coiled strip of bag closure tags, a channel having a width corresponding to the thickness of the bag closure tags and a height greater than the height of the bag closure tags. The channel terminates with an inclined surface such that the upper surface of the tag can be exposed with the entrance to the opening within the tag lying substantially flush with the inclined surface. When a bag to be closed is slid manually downward along the inclined surface, the crushed end of the bag enters the opening in the closure tag and is seated therein. The bag and the closure tag are then manually slid until the closure tag leaves the channel and is broken from the strip. In the process of clearing the first closure tag, engaged with a bag, from the channel, the next following closure tag is brought into position to receive the next bag to be closed.