Abstract: A fiber placement machine undergoes a plurality of axes of motion in locating a delivery head (containing a compaction roller) perpendicular to a mandrel, with relative movement between the head and the mandrel along a predetermined path, which may be over a complex compounded shape. The machine includes a temperature controlled creel where rovings (or tows) of fibrous material are stored on spools and are fed from the creel to the delivery head. The delivery head processes the tows into a band and applies the band on the surface of the mandrel by means of the roller compaction.

Abstract: A delivery head assembly is provided for forming a tape band from a plurality of tows and applying the band as superimposed layers in a helical pattern on to a mandrel to produce non-uniform cross sectional articles. This head assembly is composed of a distribution section, ribbonizing section, coating section, add section, and compaction roller.

Abstract: Disclosed herein is a fluidization patient support system that enables decrease and elimination of the unpleasant and aggravating "pinging" sensation to which patients are presently exposed. The flow rate of air to the plenum chamber beneath the diffuser and fluidization material is controlled by a valve in the air flow conduit, there being a diversionary discharge outlet at the valve, such that the valve can control the ratio of air flow to the diversionary outlet and to the plenum.