Special receptacle or package – For roll or reel – Wrapped – boxed – or secured through roll core
Reexamination Certificate
1999-10-05
2001-08-21
Sewell, Paul T. (Department: 3728)
Special receptacle or package
For roll or reel
Wrapped, boxed, or secured through roll core
C206S407000, C220S008000
Reexamination Certificate
active
06276528
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a tubular core assembly of the type used for winding continuous webs such as, for example, roll carpet or other forms of web material such as plastic film, newsprint and the like. More particularly, the invention relates to a tubular core assembly having mechanically interlocked end members, or inserts, facilitate the retention of a protective overwrap material used to protect the material wound upon a core.
2. Description of Related Art
U.S. Pat. No. 5,393,010 discloses a tubular core assembly for winding or unwinding sheet material, including inside diameter-reducing annular insert members at opposed ends of the tubular core. Each annular insert member is mechanically interlocked to the tubular core by at least one axial groove in the bodywall of the tubular core, which is arranged to engage an axially extending tongue member on an annular insert member.
U.S. Pat. No. 5,340,050 also discloses a similar tubular core assembly, wherein inside diameter-reducing annular insert members are mechanically locked to the tubular core by at least one radially extending pin.
U.S. Pat. No. 4,875,636 discloses a tubular core assembly that includes end caps, or plugs, arranged to be press-fit into the core to prevent damage to the end portions of the core. The core plugs include an outside lip area to aid in removal of the core plugs from the tubular core.
SUMMARY OF THE INVENTION
The present invention provides a tubular core assembly and system. The system includes a rigid, open ended, tubular core body, a pair of annular insert members, an over-wrap, an installation tool and a removing tool. The tubular core assembly includes the tubular core body, which has grip strips arranged in a pattern on its outer surface, and at least one circumferential locking area adjacent each end of the tubular core body, and a pair of annular insert members each configured to be received within respective opposed ends of the tubular core body.
Each insert member includes a plurality of radially extending members integrally formed on an external peripheral surface of the insert member and configured to be received in one or more circumferential locking areas of the tubular core body. Upon engagement of an insert member with an end of the tubular core body, one or more of the radially extending members become 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 grip strips may be arranged in any pattern, and preferably in either as straight strips oriented parallel to the long dimension of the tubular core body, or in a helical pattern, generally wrapping around the tubular core body. The grip strips may be made of any material which satisfies the function of frictionally engaging the first wrap of a continuous web adapted to be rolled about the tubular core body.
The tubular core assembly further includes an over-wrap, such as, for example, a plastic sheet material, 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 inside wall of the tubular core body.
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Elrod Ray
Nowotny Robert
Continental Products
Kondracki Edward J.
Luong Shian
Miles & Stockbridge P.C.
Sewell Paul T.
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