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US 3,966,139 AGranted
Textile serving spool
AssigneeOwens-Corning Fiberglas Corporation
InventorAnthony Terpak
Life of this patent
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AssigneeOwens-Corning Fiberglas Corporation
InventorAnthony Terpak
Estimating the term…
An improved plastic spool for serving electrical insulation, such as glass fiber yarn, about a continuous wire is provided having a better combination of strength and breakability properties than prior spools. The spool is made by joining two identical molded halves, and comprises a hollow tubular core and radially extending flanges at each end of the core. The flanges are tapered in thickness and are reinforced by integrally molded stiffening ribs. The flanges are provided with grooves along which the plastic will fracture, which grooves are aligned with slots in the core. The slots extending axially along the core but terminate a distance from each flange such that the core is not weakened, yet the fractures along the groove lines will propagate across the remaining solid plastic continuum and connect with the slots to fragment the spool into pieces. The spool also includes a paper insert which lines the core of the spool for snug engagement with a mandrel.
A textile serving spool for supporting a strand or yarn wound thereon and adapted for mounting on a rotatable mandrel and for serving the strand or yarn about a continuous object passing axially through the center of the mandrel, the spool comprising a hollow cylindrical core and a pair of integral annular flanges respectively at opposite ends of the core, the core and flanges being made of breakable material, each of the flanges having grooves in its surface extending between inner and outer peripheries thereof and corresponding to like grooves in the opposite flange to form pairs of grooves, the core having a slot for each pair of grooves, and having a rib extending axially along the interior thereof, each slot extending radially through the wall of the core and axially along the core between corresponding grooves but terminating a short distance from each of the flanges to leave continuums of breakable material respectively at opposite ends of the core whereby when the flanges are fractured by breaking along the grooves the lines of fracture propagate across the continuums of material to the corresponding slots in the core and the core and flanges separate into at least two pieces for easy removal from the mandrel, and a liner in the core effective to frictionally engage with the mandrel, the liner having a slit extending from end to end to permit removal thereof from around the mandrel and being disposed in the core with the slit cooperatively engaging the rib extending axially along the interior of the core whereby the liner cannot rotate relatively to the core.
A textile serving spool for supporting a strand or yarn wound thereon and adapted for mounting on a rotatable mandrel and for serving the strand or yarn about a continuous object passing axially through the center of the mandrel, the spool being made of breakable material and comprising a hollow cylindrical core and a pair of integral annular flanges respectively at opposite ends of the core, each of the flanges having grooves in its surface extending between inner and outer peripheries thereof and corresponding to like grooves in the opposite flange to form pairs of grooves, the core having a slot for each pair of grooves, each slot extending radially through the wall of the core and axially along the core between corresponding grooves but terminating a short distance from each of the flanges to leave continuums of breakable material respectively at opposite ends of the core whereby when the flanges are fractured by breaking along the grooves the lines of fracture propagate across the continuums of material to the corresponding slots in the core and the spool separates into at least two pieces for easy removal from the mandrel, the thickness of each flange decreasing from its inner periphery to its outer periphery and the depth of each groove in the flange varying with the thickness of the flange in such a manner that the thickness of material to be broken along the bottom of the groove is constant across the flange, and radially extending, integral stiffening ribs on the surface of each flange, the thickness of the ribs being inversely proportional to the thickness of the flange whereby the thickness of the flange plus the thickness of the ribs is constant across the flange.
A textile serving spool for supporting a strand or yarn wound thereon and adapted for mounting on a rotatable mandrel and for serving the strand or yarn about a continuous object passing axially through the center of the mandrel, the spool being made of breakable material and comprising a hollow cylindrical core and a pair of integral annular flanges respectively at opposite ends of the core, each of the flanges having grooves in its surface extending between inner and outer peripheries thereof and corresponding to like grooves in the opposite flange to form pairs of grooves, the core having a slot for each pair of grooves, each slot extending radially through the wall of the core and axially along the core between corresponding grooves but terminating a short distance from each of the flanges to leave continuums of breakable material respectively at opposite ends of the core whereby when the flanges are fractured by breaking along the grooves the lines of fracture propagate across the continuums of material to the corresponding slots in the core and the spool separates into at least two pieces for easy removal from the mandrel, the spool being formed of two identical molded portions each having a cylindrical core section, an annular flange at one end of the core section, and alternate fingers and grooves extending from the other end of the core section which interlock with corresponding grooves and fingers of the other molded portion when the molded portions are joined together to make the spool.
Dependencies are inferred from the claim text.