Abstract: The invention provides a continuous paperboard sheet adapted to be slit longitudinally into a plurality of continuous paperboard plies, and to improved paperboard plies for forming single-layer, paperboard tubes. The paperboard sheet has a substantially constant width and includes a plurality of thick longitudinal sections and a plurality of thin longitudinal sections. The thick and thin sections are arranged in alternating relation across the width of the paperboard sheet. The sheet is slit longitudinally along the thin sections to provide a plurality of tube-forming paperboard plies.

Abstract: A reel is provided for the winding and unwinding of wire or the like. The reel includes a cylindrical hub having a pair of flanges, one at each end of the hub. The hub includes an inner cylindrical wall defining a central hollow bore through the center of the reel. An outer cylindrical wall is provided concentrically around the inner wall and forms a barrel surface for the winding of the coiled wire (or the like) thereon. The flanges serve to protect the wire wound on the barrel surface. A frusto-conical or tapered wall is provided at opposite ends of the reel to connect the inner wall of the hub to the radially projecting flange. The frusto-conical wall includes at least one opening or window therein, providing a handle for lifting the reel from a package or carton. The reel may also be provided with a series of concentric cylindrical support ribs within the hollow portion defined by the flanges. Other structural support members may also be provided by the internal structures of the reel.

Abstract: A yarn carrier is provided of the type including a substantially rigid tubular core having passageways through the sidewall thereof for the passage of dye or wet finishing bath into the yarn to be wrapped thereon. A filter sleeve is wrapped around the outer surface of the tubular core to prevent entrapment of the yarn in the passageways and for filtering the dye and/or finishing bath. The filter sleeve is formed from a filter material which is wrapped into a sleeve and abutting edges of the filter material are bonded together along a seam. The seam is contemplated to be substantially continuous and extend the length of the sleeve. The tubular sleeve is slid over or heat shrunk onto the outside surface of the tubular core prior to the winding of the yarn thereon.