Method of making an article of bonded metal particles
OwnerBarry J. Chase, Roy W. E. Rushforth +1inventors
InventorsBarry J. Chase, Roy W. E. Rushforth, Gordon J. Selman
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Abstract
A process for producing metallic articles comprises forming a mixture of metallic particles of platinum group metals, gold or silver, and particles of a thermoplastic material, placing the mixture in a mold and molding the mixture under pressure and at an elevated temperature. The metallic particles comprise at least 92.5% by weight of the article and have a size ranging from 1/2 to 50 microns. The thermoplastic polymeric material has a minimum dimension of 1/2 micron.
Claims11
A process for producing a metallic article comprising forming a mixture of metallic particles selected from the group consisting of platinum group metals, gold and silver and particles of a thermoplastic material, placing said mixture in a mold and molding the mixture under pressure and at elevated temperature, and removing from said mold said metallic article, the metallic particles comprising at least 92.5% by weight of the article and having a size falling within the range 1/2 to 50 microns, and the thermoplastic polymeric material having a minimum dimension of 1/2 micron.
A process for producing a metallic article comprising forming a mixture of metallic particles selected from the group consisting of platinum group metals, gold and silver, and particles of a thermoplastic material, placing said mixture in a mold and molding the mixture under pressure and at an elevated temperature and removing from said mold said metallic article, the metallic particles having a size falling within the range 1/2 to 50 microns.
A process for producing a metallic article comprising forming a mixture of metallic particles selected from the group consisting of platinum group metals, gold and silver, particles of a thermoplastic material and a tarnish inhibiting amount of a tarnish inhibiting agent, placing said mixture in a mold and molding the mixture under pressure and at a temperature ranging from 100 to 250.degree. C. and removing from said mold said metallic article, the metallic particles comprising at least 92.5% by weight of the article and having a size falling within the range 1/2 to 50 microns, and the thermoplastic particles having a minimum dimension of 1/2 micron.
Dependencies are inferred from the claim text.