Method of fabricating a sealing cover for an hermetically sealed

Details Method of fabricating a sealing cover for an hermetically sealed Method of fabricating a sealing cover for an hermetically sealed

1974-10-22

1976-03-23

Goldberg, Elliot A.

Electric heating

Metal heating

For bonding with pressure

219 85, 228253, B23K 1110

Patent

active

039461904

ABSTRACT:
A conductive hermetic sealing cover for a container is fabricated by disposing the cover with a superimposed preformed heat-fusible conductive ring having outer dimensions similar to those of the cover in a shallow cavity of a nonconductive supporting member, the cavity having dimensions only slightly larger than those of the cover to secure registration between the ring and the periphery of the cover. A plurality of pairs of spaced electrodes are resiliently engaged with the ring with substantially equal contact pressures and a separate pulse of current is passed between the electrodes of each pair and through the ring and the cover, thereby producing an effective spot weld between the ring and the cover adjacent each of the electrodes. The term "ring" is used herein and in the appended claims in its generic sense to include a closed loop of conductive material of any configuration corresponding to the periphery of the cover, usually round or rectangular. The cover so fabricated is then applied to seal a container consisting of a body having a cavity therein by assembling the cover on the body with the sealing ring in contact with the body surrounding the cavity and then heating the assembly to a temperature sufficient to fuse the ring to the cover and to the body.

REFERENCES:
patent: 3415973 (1968-12-01), Verbeck
patent: 3486223 (1969-12-01), Butera
patent: 3660632 (1972-05-01), Leinkram
patent: 3683146 (1972-08-01), Nugent et al.
patent: 3693239 (1972-09-01), Dix

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