Patent ID: 6918561

Claim:
A shell assembly for winding tire cord strip or belt cord strip, comprising: a core body including a reinforcing portion configured in such a manner that circular flanges are attached to either end of a square pipe by means of welding, said square pipe being made of metal; corner reinforcing members formed at four corners of the square pipe to which the flanges are attached, and reinforcing fins being attached between the corner reinforcing members, wherein each of the outer ends of the reinforcing fins is attached to the inner sides of the circular flanges by means of welding; a plurality of reinforcing discs attached at regular intervals to the outer surface of the square pipe; and a cylindrical body composed of first and second metal cylinder parts, the cylindrical body including a reinforcing portion formed at regular intervals on the outer circumference of the metal cylinders in the form of a ring-shaped groove, wherein an overlapping connecting portion is formed at an end of each of the first and second cylinder parts, the overlapped connecting portions being fixed to each other by means of welding, wherein the core body is inserted into the cylindrical body, the circular flanges are attached to the both ends of the cylindrical body by means of welding, the reinforcing discs are in contact with the reinforcing portions of the cylindrical body, and a paper layer is applied to the surface of the cylindrical body to a thickness of below 3 cm.