Abstract: In a fiber-processing machine with a separating edge, in which both fibers as well as air are guided past the edge in a substantially predetermined conveying direction, air layers loaded with dirt particles or waste are deflected by means of the edge from the stream of fibers/air. The removal of dirt is aided at first by means of blast air.

Abstract: A flap is disposed across the opening between an expansion chamber and an exhaust air duct to control the delivery of fiber tuft-laden air into a feed chute or chamber. The flap has two wings which pivot about a common pivot axis whereby as one wing increases the flow cross section from the expansion chamber, the other wing reduces the flow cross section. A pressure difference produces forces on both wings simultaneously.

Abstract: A rotary indexing apparatus for automatic insertion of devices on printed circuit boards has a main support member attached to the insertion machine and a circular locating and supporting member rotatably supported by the main support member. Apertures are provided in the circular member over which can be positioned printed circuit boards. Generally four such locations are provided, particularly for insertion machines with an inserting head which inserts devices at two positions successively. By indexing the table between each complete cycle, devices are inserted in two directions, at right angles to each other, by insertion occurring first at one location and then at another location after the circular member has been indexed.