Method for developing and sustaining uniform distribution of a plurality of metal powders of different densities in a mixture of such metal powders
AssigneeDoris Nebel Beal Inter Vivos Patent Trust
InventorHarold F. Beal
Life of this patent
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Abstract
A method by which the distribution of the particulates of a plurality of metal powders, the metals of each powder being of different densities, may be uniformly disbursed within a dry mixture of the powders and by which this uniform dispersion of the different density powders can be sustained through subsequent handling and/or storage of the mixture. In accordance with one aspect of the present invention, a quantity of each of a plurality of metal powders is admixed with a dry stabilizing non-metal powder. One particularly useful non-metal powder is a micronized polymer, preferably micronized polyethylene.
Claims20
A method of developing and sustaining uniform distribution of a plurality of dry metal powders of differing densities within a dry mixture of the powders comprising the steps of
- blending a quantity of at least a first dry powdered form of a metal having a density greater than the density of lead and a second dry powdered form of a metal having a density not greater than the density of lead with a quantity of a dry micronized polymeric powder for a time sufficient to intersperse the powders uniformly throughout a dry mixture thereof, said dry powders of said mixture being sustained against separation of the dry powder particles of the mixture as a function of their respective densities.
A method of developing and sustaining a mixture of uniformly distributed dry metal powders of different densities comprising the steps of
- introducing a quantity of each of the dry metal powders into a blender,
- introducing a quantity of a non-metal stabilizing dry powder into the blender with the metal powders,
- blending the metal powders and the stabilizing dry powder for a time sufficient to develop a uniform distribution of the metal powders throughout the mixture and stabilization of said dry metal powders against separation of said dry metal powders of the mixture as a function of their respective densities.
A mixture of at least a first dry metal powder having a density greater than the density of lead, at least a second dry metal powder having a density not greater than the density of lead and between about 0.08% and about 1.5%, by weight, of a polymeric powder having a density not materially greater than 1 gm/cc, said mixture exhibiting substantially no separation of said powders based upon their relative densities upon agitation of said mixture by events and/or forces which tend to cause separation of said dry metal powders in the course of activities such as storage, transfer, and/or aliquoting of said mixture.
Dependencies are inferred from the claim text.