Method of packaging coils

Abstract

The method of packaging coils uses a tear-resistant packaging tube having openings at either end. The tear-resistant packaging tube is made from at least one layer of material. The coil is generally cylindrical and defines a length, a circumference, an inside diameter, and an opening with an inner periphery. The coil is placed inside of the tube so that there is excess circumferential tube material extending from a first end of the coil. The excess circumferential material of the tube is then inserted through the opening at the center of the coil and drawn through the coil to the second end. The edges of the tube which extend from the second end of the coil are then folded back around the outside of the coil and sealed to secure the tube on the roll.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a method for wrapping a rolled material, particularly a roll or coil of metal, such as steel or aluminum. [0003] 2. Description of the Related Art [0004] In steel mills the steel is often made in sheets having a length many times greater than its width. The sheets are wound into coils for compactness during storage. The coils of steel may be stored on pallets for ease in moving and manipulating the coils. It is desirable to wrap the coils of steel in material which is relatively impermeable to water to prevent corrosion of the steel during storage and transport. The process of wrapping coils of metal, and particularly large coils of sheet steel, is labor intensive and costly. There is a need for an efficient method for wrapping coils for transport and storage. [0005] Japanese Patent No. 2-127,271, published May 15, 1990, discloses a strip of packaging material having two edges and a ...

AI Technical Summary

Benefits of technology

[0008] A packaging tube according to one embodiment of the present invention includes at least one rectangular sheet of a polymeric material, having a first edge, an opposing second edge, a third edge, and an opposing fourth edge. The tube is formed by folding the sheet along a line bisecting the sheet and sealing the first and second edges together. The sheet may be impregnated with a volatile corrosion inhibitor or a multi-purpose inhibitor to prevent deterioration of the coil by corrosion. The sheet may be a multi-layered material semi-laminated around the periphery and / or at continuous or discontinuous intervals across the width or length of the sheet.

Problems solved by technology

The process of wrapping coils of metal, and particularly large coils of sheet steel, is labor intensive and costly.

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