Chemistry: electrical current producing apparatus – product – and – Means externally releasing internal gas pressure from closed... – Blowout type
Patent
1982-12-02
1984-10-09
Skapars, Anthony
Chemistry: electrical current producing apparatus, product, and
Means externally releasing internal gas pressure from closed...
Blowout type
429174, 429185, H01M 212
Patent
active
044762003
ABSTRACT:
In a sealed galvanic cell having an anode, cathode, and cylindrical can into which the principal components of the cell are assembled, a sealing and insulating member at the top end of the cathode can is provided which is held in sealing relationship to the can by a crimp formed over the top edge thereof. The sealing and insulating member has a circular rim formed at its periphery in at least one of the top and bottom surfaces, the diameter of the sealing and insulating member being substantially the same as the inside diameter of the can above a bead which is formed near the top edge thereof. At least a portion of the thickness of the peripheral material of the member is stressed by the crimp in an amount greater than the elastic limit of the material, and at least another portion of the thickness of the peripheral material of the sealing and insulating member is stressed in an amount less than the elastic limit. The stressed portion is at the top or bottom of the periphery of the member. When the can is sealed by crimping over the member, a change of elevation of at least the central portion of the sealing and insulating member may occur, or inward flexing of the peripheral rib may occur, or both.
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patent: 3623915 (1971-11-01), Pun et al.
patent: 4052533 (1977-10-01), Heinz, Jr.
patent: 4074022 (1978-02-01), Nadal
patent: 4146681 (1979-03-01), Spanur
patent: 4191806 (1980-03-01), Levy
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patent: 4309493 (1982-01-01), Kuhl et al.
Book Ronald J.
Markin Charles
Smith Michael J.
Wiacek Marian
Cornell Ronald S.
Duracell Inc.
Nissenbaum Israel
Skapars Anthony
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