Patent GB-956740-A (GB)
Title: Surface construction and method of manufacture
IPC: D06F75/38
Filed: 1962-07-09
Abstract: A household appliance comprises a metallic body having a non-stick surface which has a multitude of interstices filled with a non-stick material so that the surface is composed externally of minute areas defined by peaks of the surface, and of areas of non-stick material, interconnecting said minute areas. The appliance may be for example a frying pan, waffle iron, oven or domestic (laundry) iron.  The interstices may be produced by sand or shot blasting; this may be followed by the application of a porous metal or glass layer; the roughened surface is then cleaned and coated and/or impregnated with the non-stick material which may be a fluorocarbon polymer or telomer, or a silicone resin, for example by vacuum impregnation, followed by buffing to ensure that the peaks of the metallic surface are exposed. Alternatively, the porous-layer-forming material (e.g. powdered aluminium) and the non-stick material may be mixed and flame- or arc-sprayed simultaneously on to the surface, followed by a further impregnation.ALSO:A household appliance comprises a metallic body having a non-stick surface which has a multitude of interstices filled with a non-stick material so that the surface is composed externally of minute areas defined by peaks of the surface, and of areas of non-stick material interconnecting said minute areas.  The appliance may be for example a frying pan, waffle iron, oven or domestic (laundry) iron.  The interstices may be produced by sand or shot blasting; this may be followed by the application of a porous metal or glass layer; the roughened surface is then cleaned and coated and/or impregnated with the non-stick material which may be a fluorocarbon polymer or telomer, or a silicone resin, for example by vacuum impregnation, followed by buffing to ensure that the peaks of the metallic surface are exposed.  Alternatively, the porous-layer-forming material and the non-stick material may be mixed and flame- or arc-sprayed simultaneously on to the surface, followed by a further impregnation.  The porous metal may be aluminium or an alloy thereof, copper or an alloy thereof, iron or an alloy thereof, or a copper-nickel alloy.  The substrate may be aluminium.ALSO:A household appliance comprises a metallic body having a non-stick surface which has a multitude of interstices filled with a non-stick material so that the surface is composed externally of minute areas defined by peaks of the surface, and of areas of non-stick material interconnecting said minute areas.  The appliance may be for example a frying pan, waffle iron, oven, or domestic (laundry) iron, and may be of aluminium.  The interstices may be produced by sand or shot blasting; this may be followed by the application of a porous metal or glass layer; the roughened surface is then cleaned and coated and/or impregnated with the non-stick material which may be a fluorocarbon polymer or telomer, or a silicone resin, for example by vacuum impregnation, followed by buffing to ensure that the peaks of the metallic surface are exposed.  Alternatively, the porous-layer-forming material (e.g. powdered aluminium) and the non-stick material may be mixed and flame- or arc-sprayed simultaneously on to the surface, followed by a further impregnation.ALSO:A household appliance comprises a metallic body having a non-stick surface which has a multitude of interstices filled with a non-stick material so that the surface is composed externally of minute areas defined by peaks of the surface, and of areas of non-stick material interconnecting said minute areas. The appliance may be for example a domestic (laundry) iron.  The non-stick material may be a fluorocarbon polymer or telomer, or a silicone resin.