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Title: Method for producing bi-metal object and product thereof
Abstract:
A method is provided for producing a bi-metal object comprised of at least one image area raised in relief on the base of the object. The area in relief and the base of the object consist of different metals. The method comprises compacting the metal powder which will constitute the image area raised in relief; compacting the metal powder which will constitute the base of the bi-metal object while that powder is in direct contact with the metal powder already compacted to form the area in relief; sintering the composite at a relatively low temperature and for a preferred interval of time; and striking a chosen design on the base of the bi-metal object. The finished product will comprise an image area raised in relief which will be of appreciable height; the image area raised in relief will be separated from the base by a sharp regular border; and the base may retain a proof finish.
Other info: Inventors: Kirkham, Kathleen E. (Drexel Hill, PA, US) Application Number: 377378 Filing Date: 1973-07-09 Publication_date: 1976-02-10 Assignee: Franklin Mint Corporation (Franklin Center, PA) Primary Class(es): 428/548 419/6, 428/672, 428/673, 428/687 Other Classes: US Patent Ref:
Other Refs: Other References: Knopp et al. et al., International Journal of Powder Metallurgy, Vol. 3, No. 1, pp. 57-62, (1967). | |