Abstract: In order to increase output of pipe straightening devices, there is provided a driving unit between a preparatory station for the pipes and a feeding station which advances the pipes from the preparatory station in axial direction one after the other in the feeding station. The feeding station includes a succession of rotation symmetrical guiding elements supported for rotation about axes which extend parallel to the feeding path for the pipes. The guiding bodies prevent striking of unbalanced pipes against the feeding unit and permit axial feeding of the pipes in a straightening station.

Abstract: Tubes or conduits, guiding slubbing or roving or the like during pneumatic transport thereof, terminate at a box or cabinet which delimits a compartment connected with the suction side of a ventilator. Within the compartment there is provided for each tube an elongate delay space or chamber, through which pass the slubbing while supported by guide elements, whereas the slubbing-transport air flows off into the compartment by means of throughpass openings. Between outfeed or outlet openings, through which the slubbing departs from the box, and the delay spaces or chambers there are provided dam-up spaces through which there does not flow the transport air and into which there also cannot enter any ambient or outside air, since the band-outlet openings are closed by closure elements, typically pairs of rolls acting as sealing elements. The dam-up spaces permit a brief storage of the incoming slubbing or the like.

Abstract: A rotatable shaft has a roller electrode mounted on it for rotation therewith. A transformer and a rectifier are structurally integrated to form a unit which is also mounted on the shaft for rotation with it, and serve to convert high-voltage low-amperage net current into low-voltage high-amperage DC current. Slip rings are mounted on the shaft to transmit electrical current to the unit for supply to the roller electrode.