Alcan International Limited

Andrew J Hobbis

David Skingley Wright

Philip G Enright

Ronald E Tapping

The invention is particularly directed to the problem of creep deformation in a coiled aluminum strip, which occurs during coiling and for a period thereafter. The problem arises because the profile of the strip across its width is not flat, and is in fact usually thicker in the middle than at the edges (positive crown). To compensate for this, the invention provides that the spool onto which the coil is wound is adapted to provide more support to the strip in the center than at the edges, by making the central portion of the spool of a greater diameter than the end portions of the spool. A strip having a positive crown which is wound onto such a spool was found to exhibit significantly reduced creep strain, leading to reduced creep deformation.

Storage and transportation of aluminium strip

A method of forming a filter cake for filtering liquid metal from particles stable within the liquid metal on an inert, liquid metal permeable substrate in the flow path of the liquid metal to be filtered characterized by depositing the particles in the flow path upstream of the substrate to be carried at least partially by the metal flow and dispersed as a pre-wetted and pre-primed filter cake on the substrate.

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Banbury, United Kingdom

Andrew J Hobbis