| 摘要 |
1,139,871. Ornamenting. C. W. FORESTEK. 20 Jan., 1967 [24 Jan., 1966], No. 3182/67. Addition to 1,126,748. Heading B6G. [Also in Divisions B2 and C7] Particles of materials other than perfluorocarbon type polymers and having an average particle size of less than 50 microns are incorporated into a surface characterized by a multiplicity of minute pores or fissures formed therein which do not exceed an average size of 100 microns by disposing the particle in the pores or fissures at a temperature of at least 300‹ F. below the temperature of the surface so that when the particles and the surface reach the same or an equilibrium temperature the particles are locked into the pores or fissures by an interference fit, fusion of the particles being avoided. The surface which is usually a metallic surface may be prepared by a mechanical pre-treatment such as liquid-honing or sand blasting or pretreated by chemical means such as acid etching techniques or by forming a porous coating on the surface such as zinc phosphate. The surface may be a sintered or powdered metal material or a sprayed metal surface. The particles may be cooled or the surface heated to provide the required temperature differential. The particles may be disposed on the heated surface by brushing them on or by applying them in an aqueous dispersion, by air blasting them on the surface or by employing electrostatic techniques. The particles may be metals, metal compounds such as carbides, nitrides, titanium, zirconium, molybdenum, hafnium and selenium. A list of other metals and metal compounds, and non-metals is given. Particles of graphite and molybdenum disulphide may be incorporated in a steel surface as lubricant. Rhodium particles may be disposed in the point of a pen. Platinum particles may be disposed in sintered glass beads or cylinders to make catalyst material. Alpha brass particles may be disposed in steel surfaces to improve the adhesion of rubber. Copper particles may be disposed in sheet steel to improve the bond between copper and steel. Silver particles may be disposed in copper or other metallic surfaces to obtain an electrical contact surface. Metal particles may be disposed in the surface and then heated to fuse the particles to form an alloy. Tungsten carbide or silicon carbide particles may be disposed in surfaces to form an abrasive. Iron or copper particles may be disposed in steel or aluminium surfaces to provide decorative effects. The surface may be heated by high-frequency induction heating. |
