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: The specification discloses an improvement in rotary screening apparatus for the filtration of liquids and especially water. Such apparatus comprises (a) a stationary structure including a delivery channel for the feed water and a screened water holding tank wherein a lower elevation of screened water is maintained and (b) a screen drum disposed to receive feed water from the channel and to rotate within the tank on a horizontal axis with the uppermost section of its cylindrical surface above the feed for cleaning purposes. The improvement resides in a seal between the holding tank and the drum which provides improved protection against leakage and utilizes a flow of screened water which drives the feed water away from the seal if and wherever there may be a leak.