Patent ID: 6886712

Claim:
A sealing cover for permanently sealing a processing hole having a predetermined shape in a metal sheet having a predetermined thickness comprising: a cover plate having a cover edge with an integrally formed concentric bead; a strip of adhesive disposed on said cover plate adjacent said cover edge; and a spring plate fixedly connected to said cover plate in a plane parallel to said cover plate and spaced from the cover edge of said cover plate a distance corresponding to the thickness of the metal sheet, wherein an outer edge of said spring plate has a shape corresponding to the shape of the processing hole in the metal sheet, and said spring plate includes at least two integrally formed spring tongues, with a free outer end of each spring tongue including an integrally formed protrusion extending towards said cover plate, for exerting a spring force on a back side of the metal sheet after rotating said sealing cover, to seal the processing hole in the metal sheet.