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AssigneeAlcan International Limited
InventorsDavid F. Charles, Greg J. Courval, Michael P. Thomas, Michael J. Wheeler, Ian Wilson
Estimating the term…
Application of surface marking to metal stock, such as aluminum sheet, prior to or during scrap-generating manufacturing operations, to provide a detectable mark on pieces of manufacturing scrap derived from the marked sheet and commingled with scrap of other aluminum alloy sheet, so that the scrap can be sorted and the marked alloy scrap pieces separated from scrap of other alloy sheet to which the marking was not applied. Different markings, providing detectably different marks, may be respectively applied to sheet of different compositions if scrap pieces of more than two different compositions or compositional families are to be sorted and separated from each other.
In a method of sorting metal scrap comprising a mixture of scrap metal pieces respectively derived from metal stock of at least two different compositions, to separate the scrap metal pieces of a first of said compositions from the scrap metal pieces of a second of said compositions, said stock of each of said two compositions having a surface and being initially separate from the stock of the other of said two compositions, said scrap being generated and mixed during or after procedures performed on said stock of said two compositions, and said scrap metal pieces of each of said two compositions bearing portions of the surface of the stock from which they are derived, the steps of
A method of applying a marking agent to metal stock for scrap sorting purposes, comprising
A method of applying a marking agent to metal stock for scrap sorting purposes, comprising
A method of applying a marking agent to aluminum sheet for scrap sorting purposes, comprising
A method of preparing aluminum sheet for scrap sorting purposes, comprising
A method of sorting metal scrap generated incident to manufacturing operations performed on aluminum sheet of at least two different alloy compositions, the sheet of each said composition having a surface and the scrap comprising a mixture of scrap metal pieces respectively derived from the aluminum sheet of each of said compositions and bearing portions of the surface of the sheet from which the pieces are derived, said method comprising:
In a method of sorting metal scrap comprising a mixture of scrap metal pieces respectively derived from metal stock of at least two different compositions, to separate the scrap metal pieces of a first of said compositions from the scrap metal pieces of a second of said compositions, said stock of each of said two compositions having a surface and being initially separate from the stock of the other of said two compositions, said scrap being generated and mixed during or after procedures performed on said stock of said two compositions to produce articles bearing first portions of the surface of the stock from which they are made and to detach said scrap from said articles, and said scrap metal pieces of each of said two compositions bearing second portions of the surface of the stock from which they are derived, the steps of
Dependencies are inferred from the claim text.