초록 ▼

A tubular core assembly and system including a rigid, open ended, tubular core body having grip strips arranged in a pattern on the outer surface of the tubular core body, at least one circumferential locking area, and a pair of annular insert members each configured to be received within respective

A tubular core assembly and system including a rigid, open ended, tubular core body having grip strips arranged in a pattern on the outer surface of the tubular core body, at least one circumferential locking area, and a pair of annular insert members each configured to be received within respective opposed ends of the tubular core body. Upon engagement of an annular insert member with an end of the tubular core body, at least one radially extending member integrally formed on an external peripheral surface of the insert member, becomes releasably interlocked with the locking area, and one or more other radially extending members become frictionally engaged with an inner surface of the tubular core body. The pattern of the grip strips is configured such that when sheet material disposed in a first wrap around the tubular outer surface frictionally engages the grip strips, the first wrap remains releasably retained and successive wraps of the sheet material are disposed in a tightly rolled configuration. The assembly further includes an over-wrap arranged to encase a roll of sheet material wrapped around the tubular core body so that opposing ends of the over-warp are each releasably retained in a pinching engagement between a respective annular insert member and the tubular core body.

대표청구항 ▼

[ What is claimed is:] [1.]1. A tubular core assembly for a roll of sheet material comprising:an elongate hollow cylindrical tubular core body comprising a bodywall having an outer and inner surface, said tubular core body having at least one circumferential slot integrally formed in said bodywall,

[ What is claimed is:] [1.]1. A tubular core assembly for a roll of sheet material comprising:an elongate hollow cylindrical tubular core body comprising a bodywall having an outer and inner surface, said tubular core body having at least one circumferential slot integrally formed in said bodywall, extending through said bodywall;annular insert members, said annular insert members each having a cylindrical exterior periphery and configured to be inserted and received into respective ends of said tubular core body in coaxial relation therewith; anda plurality of spaced, outwardly extending tongue members integrally formed on said cylindrical exterior periphery of each of said annular insert members and configured to be received in said slots of said tubular core body in interlocking relationship therewith, whereupon engagement of said annular insert members with respective ones of said opposing ends of said tubular core body results in said at least one radially extending tongue member being received in interlocking engagement with said at least one circumferential slot and at least one other radially extending tongue member being received in frictional engagement against the inner surface of said bodywall to frictionally retain said inserted annular insert member in place.