Method of fabricating a sealing cover for an hermetically sealed container

The method of fabricating an hermetic sealing cover for a container comprising:

• superimposing a preformed ring of heat-fusible material upon a sealing cover and in registry with the periphery thereof;
• and locally heating said ring to a fusing temperature at a plurality of spaced points by a plurality of spaced heat-generating elements, thereby producing an effective attachment between said ring and said cover at each of said points.

The method of fabricating a metallic hermetic sealing cover for a container comprising:

• superimposing a preformed ring of heat-fusible material upon a cover and in registry with the periphery thereof;
• and locally heating said ring to a fusing temperature at a plurality of spaced points by engaging said ring with a plurality of spaced electrodes and passing a pulse of current through each of said electrodes, said ring, and said cover, thereby producing an effective attachment between said ring and said cover at each of said points.

The method of fabricating a metallic hermetic sealing cover for a container comprising:

• superimposing a preformed ring of heat-fusible material upon a cover and in registry with the periphery thereof;
• and locally heating said ring to a fusing temperature at a plurality of spaced points by engaging said ring with one or more pairs of spaced electrodes and in which a pulse of current is passed through said ring, said cover, and through the electrodes of each pair in series, thereby producing an effective attachment between said ring and said cover at each of said points.

The method of fabricating a metallic hermetic sealing cover for a container comprising:

• disposing the cover with a superimposed preformed ring in a shallow cavity of a nonconductive supporting member, said cavity having dimensions only slightly larger than those of said cover to secure registration between said ring and the periphery of said cover;
• and locally heating said ring to a fusing temperature at a plurality of spaced points, thereby producing an effective attachment between said ring and said cover at each of said points.

The method of fabricating a metallic hermatic sealing cover for a container comprising:

• disposing the cover with a superimposed preformed ring in a shallow cavity of a nonconductive supporting member, said cavity having dimensions only slightly larger than those of said cover to secure registration between said ring and the periphery of said cover;
• locally heating said ring to a fusing temperature at a plurality of spaced points, thereby producing an effective attachment between said ring and said cover at each of said points;
• and applying a jet of air to the bottom of said cavity after the fusing process to remove the cover from the cavity.