Patent ID: 6390479
Filing Date: 2002-05-21
Classification: F16J,Y10T

Abstract:
A method of manufacturing a gasket, wherein the method comprises applying heat to selected localised areas of a piece of sheet steel so that the structure of the steel is softened only in those areas, and forming an opening through said piece of sheet steel, the opening extending around a closed path in the sheet which passes through said softened areas, the opening having connecting webs extending across it at the softened areas, the webs being formed by interruptions in the opening, the webs serving to connect the portion of the sheet which is enclosed by said path with the remainder of the sheet, the method also comprising pressing said webs so that slots are formed in the top and bottom of each web, the slots connecting with the opening on both sides of the web, the method also comprising filling said opening and slots with resilient material which also forms sealing beads extending along said path and projecting from said opening and slots on both sides of the sheet.