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US 4,027,830 AGranted
Yarn support
AssigneeE. I. Du Pont de Nemours and Company
InventorThomas Albert Dolan
Life of this patent
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AssigneeE. I. Du Pont de Nemours and Company
InventorThomas Albert Dolan
Estimating the term…
Yarn support comprising an inexpensive compressible core, especially of laminated paperboard, with a water-resistant covering, especially of parchment, with the improved feature that the unwinding end is covered by parchment with a smooth transition from the winding surface to this covered end, so as to avoid snagging of the yarn during unwinding. Such yarn support may be prepared economically by making partial internal and external cuts through the core material and removing the end portion to give an external flap of axial length equal to the wall thickness of the support, and burnishing to fold and smooth this flap over the exposed ends of the inner layers of core material, to compress the core material in the flap against the ends of the inner layers to give a rounded configuration and to fair the flap into the internal surface of the support.
A hollow laminated yarn support comprising superposed bonded layers of core material with an external surface of water-resistant covering material and an internal surface, a flap of the covering material and of at least the outermost layer(s) of core material abutting one end of the remaining inner layers of core material along the inner surface of said flap, the end of said flap being faired into the internal surface of the support, whereby the flap protects an end of the support to present a snag-free surface on at least its external face.
Dependencies are inferred from the claim text.