Spool core for the wet treatment of threads and yarns

Claim 1

A spool core of unitary construction, manufactured, for example, from injection-molded thermoplastic or thermosetting synthetic material, and adapted for the wet treatment, especially the dyeing, of thread or yarn spools, the spool core comprising: a hollow tubular elongated shell constituting a major central length portion of the spool core; a foot collar and a head collar adjoining said shell on both axial ends and constituting respective upper and lower axial end portions of the spool core; a series of radial perforations or cell openings extending through the wall of said shell in a honeycomb pattern so as to reduce the remaining intermediate shell wall portions to a series of intersecting ribs, the intersecting ribs of the spool core shell having a generally triangular cross section, the triangle of said cross section having its base oriented to face radially inwardly, so that its tip faces outwardly, thereby defining the outer diameter of the shell with a honeycomb pattern of narrow ridges; said cell openings widening radially outwardly toward the outer diameter of the spool core shell; and on at least its axially extending constituent ribs near a collar, means for axially positioning the innermost yarn layers wound thereonto.