Textile core having improved start-up groove
AssigneeSonoco Products Company
InventorTony F. Rummage
Life of this patent
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Abstract
The invention provides textile cores having improved start-up grooves. In a preferred embodiment the start-up groove has a generally V shaped cross-section and at least one longitudinal portion of the groove, preferably the trailing portion of the groove, has at least one compound angle sidewall defined in longitudinal cross-section by a plurality of alternating, substantially rectangular tongue and notch sections extending along the sidewall. In accordance with another aspect of the invention, improved grooving blades for textile cores are formed using an electric discharge machining (EDM) process.
Claims14
A textile core comprising an elongate tubular body for supporting a yarn package and comprising:
- a substantially circumferential groove for gripping an incoming yarn line for windup on said core, said groove being formed in at least a portion of the periphery of said tubular body adjacent at least one end thereof;
- said groove having a generally V-shaped cross-section including an open top, a closed bottom and two sidewalls disposed on opposite sides of a center line extending radially into said tubular body, at least a first longitudinal portion of said groove having a first compound sidewall defined in longitudinal cross-section by a plurality of alternating tongue and notch sections extending along said first sidewall, said tongue and notch sections being substantially rectangularly shaped in top plan view, each of said tongue sections comprising a front wall which forms a portion of said first sidewall of said groove and extends substantially linearly from the top to the bottom of the groove, each of said tongue sections additionally comprising at least one sidewall extending substantially transversely into said groove for engaging said incoming yarn line.
Dependencies are inferred from the claim text.