Abstract: An end cap is releasably mounted on the end of a cylindrical hollow tube to form a reusable cylindrical yarn carrier or winding tube which carries a filamentary or fibrous yarn thereon. The cylindrical hollow tube is formed predominantly of a cylindrical laminated paper tube. A rigid polymeric or metallic insert is attached to the tube adjacent at least one end. While the tube is predominantly paper, the interface between the hollow tube and the end cap is formed of a material that is rigid, incompressible, and capable of being threaded. The abutting rigid walls of the hollow tube and end cap, when assembled, define a starting groove there between. When the yarn carrier has been emptied, the end cap is loosened or separated from the hollow tube and the residual fibers or filaments vacuumed or stripped away.

Abstract: An end cap is releasably mounted on the end of a cylindrical hollow tube to form a reusable cylindrical yarn carrier or winding tube which carries a filamentary or fibrous yarn thereon. When the yarn carrier has been emptied, the end cap is loosened from the hollow tube, and the residual fibers or filaments vacuumed or stripped away.The hollow tube is formed from a shell of steel, aluminum, lightweight metallic alloys or a polymeric material reinforced with fibers of aramids, carbon, ceramics, glass, or hybrids thereof. The shell is of a prescribed length and a reduced wall thickness in the range of 0.062-0.200 inches. A cylindrical insert of another material is secured to the inner surface of the shell adjacent the marginal end portions thereof to receive the threaded end cap.

Abstract: An end cap is releasably mounted on the end of a cylindrical hollow tube to form a reusable cylindrical yarn carrier or winding tube which carries a filamentary or fibrous yarn thereon. The end cap has a paper or wear resistant exterior surface and a rigid polymeric or metallic insert secured to and extending around the inner periphery thereof. The cylindrical hollow tube is formed of a cylindrical laminated paper outer surface and a rigid polymeric or metallic insert attached to the inner surface thereof adjacent at least one end. The rigid inserts carry threads that mate to releasably connect the end cap to the hollow tube. The abutting ends of the hollow tube and end cap, when assembled, define a peripheral starting groove therebetween. A minor portion of the peripheral groove is relatively narrow (locking portion), while the remaining major portion of the groove is wider (lead-in portion).

Abstract: An end cap is releasably mounted on the end of a cylindrical hollow tube to form a reusable cylindrical yarn carrier or winding tube which carries a filamentary or fibrous yarn thereon. A ring is slidably retained on the end cap in non-rotatably relation thereto between the adjacent end of the hollow tube and the confronting wall of the end cap. The confronting walls of the ring and end cap define a starting groove therebetween. A cavity of recess is formed, partially in the surface of each of the cap and ring, extending beneath and across the starting groove. When the yarn carrier has been emptied, the operator uses the cavity as access for scissors or a knife to sever the transfer tail and the major portion of the waste bunch. Later at a cleaning and refurbishing operation, the end cap is loosened from the hollow tube, and end cap and ring separated, and the remaining or residual fibers or filaments vacuumed or stripped away.

Abstract: An improvement in a system for palletizing yarn packages or other cylindrical-core-wound goods includes molded plastic pallets, a first one of which supports a plurality of yarn spools thereon and a second one of which acts as a cover; the improved pallets including a centrally disposed tubular or cylindrical wall defining a gripping aperture having an inner diameter substantially equivalent to the inner diameter of the yarn tubes. So configured, during the stacking and unstacking of the yarn packages and pallets, the pallets may be lifted and transported by the same mechanical gripping device used to lift and transport the yarn packages.

Abstract: An end cap is releasably mounted on the end of a cylindrical hollow tube to form a reusable cylindrical yarn carrier or winding tube which carries a filamentary or fibrous yarn thereon. The confronting ends of the hollow tube and end cap define a peripheral groove therebetween. A minor portion of the peripheral groove is relatively narrow (locking portion), while the remaining major portion of the groove is relatively wider (lead-in portion). When the yarn carrier has been emptied, the end cap is separated from the hollow tube and the residual fibers or filaments vacuumed or stripped away.

Abstract: A pair of identically formed, U-shaped housing halves formed of a conductive polymeric material are snapped together to form a rectangular body open at the front and rear with a top, bottom and side walls and which establishes an effective Faraday Cage. Nesting pads on the top and bottom walls provide for stacking multiple housings, one atop the other. A plurality of parallel, non-continuous tracks extend from front to rear of the body and support a pair of horizontally spaced, upstanding circuit board mounting partitions therein. Each partition includes a vertical wall having a longitudinal axis offset from the corresponding axis of supporting track and longitudinally extending channels on the opposite surfaces thereof of receiving one edge of the printed circuit board and supporting the printed circuit board horizontally between such partition and the other partition of the pair.