Abstract: An apparatus for connecting two pneumatic suction-promoting lines which are arranged at an angle to one another is disclosed. A first suction promoting line (8) has a flat or almost flat upper surface, which surface is provided with a multiplicity of openings (9) along its length. A flexible sealing band (7) extends along the length of the first suction promoting line and serves to seal off the openings (9). The connecting apparatus includes a carriage (1) which is movable along the first suction promoting line (8). The carriage (1) is adapted to lift a desired portion of the sealing band off the upper surface of the first suction promoting line (8) so as to expose some of the openings (9) of the first suction promoting line. The second suction promoting line (14) is mounted on the carriage (1) and is located in the free space between the upper surface of the first suction promoting line and the raised portion of the sealing band (7).

Abstract: A hermetically sealed valve has a magnetically actuated rolling diaphragm valve mechanism, and providing an in-line variable opening valve that is completely sealed and requires no shaft, bushings or moving components through the valve body. This provides a valve with a generally in-line flow, which may be completely isolated from contaminants or from the outside environment. The magnetic actuating mechanism permits precise gradual positional control of the valve and at the same time provides considerably greater actuation force against differential pressure across the valve than has previously been possible. The valve actuation mechanism is readily adaptable to digital control techniques.