(US4476200-A)      A cylindrical sealed galvanic cell is assembled in a cylindrical can which has a sealing and insulating member held in its top by a crimp formed over the top edge. The dia. of the member is the same as the inner dia. of the can above a bead formed near the top edge. Part of the crimp stresses the material beyond its elastic limit. (11pp)t    (GB2113458-B)      A cylindrical sealed galvanic cell having an anode, a cathode, and a generally cylindrical can into which the principal components of the cell are placed, said can having a closed bottom end and an opened top end and said can having an inwardly extending bead formed near the top end thereof; and further comprising: a sealing and insulating member at the top end of said cathode can, having a bottom peripheral edge seated on said bead, said member being held in sealing relationship to said can by a crimp formed at the top edge of said can, with said top edge of the can extending over the top periphery of said member; said sealing and insulating member having a circular rib formed at its periphery at least in one of its top and bottom surfaces, at least a first portion of the thickness of the peripheral material of said member being stressed by said crimp in an amount greater than the elastic limit of said material; and at least a second portion of the thickness of the peripheral material of said member being stressed by said crimp in an amount less than said elastic limit; said portion which has been stressed beyond the elastic limit being at the top or bottom periphery of said member.    (DE3247567-C)      Sealed battery has anode, cathode, and a cylindrical cup contg. the main components with an inwards projecting bead (46) at the upper end retaining a sealing and insulating pt. with a passage for the anode. The cap is held by a flanged-over pt. (50) of the cup, the top edge of which extends over the cap. The cap has a circumferential rib (54) on its upper or lower peripheral surface. At least a first area of the peripheral surface (60) is held with a force greater than the elastic limit while a second area (52) is held with a force less than the elastic limit.    ADVANTAGE -   Escape of electrolyte is prevented under adverse operating conditions. (12pp)    (JP92034261-B)      Cap for a dry cell battery casing has a bulbous shallow cylindrical form to be gripped by the upper border of the casing wall so that the cap cannot shift axially in either direction. The cap includes a thinwall zone in its plain profile, to relieve internal pressure in the event of internal decomposition. due to, e.g., a destructive die charge rate.    Pref. the cap features a central boss with a coaxial passage ending in an integral convex base having less wall thickness at its perimeter than its centre. Pref. the underside of the cap features another, shallow, coaxial recess having a base greater in dia. than that of the external passage through the boss. These details facilitate the introduction of a plug-fit insert for a central terminal.    USE -   D/    ADVANTAGE -   for capping the mouth of an open-topped dry-cell (Li/MnO) casing of conductive material, to contain internal electrolyte or reagents and insulate the casing electrically from a terminal contact passing through the cap. (J58140965-A)    (NL194287-B)      Cap for a dry cell battery casing has a bulbous shallow cylindrical form to be gripped by the upper border of the casing wall so that the cap cannot shift axially in either direction. The cap includes a thin wall zone in its plan profile, to relieve internal pressure in the event of internal decomposition due to e.g. a destructive die charge rate.    Pref. the cap features a central boss with a coaxial passage ending in an integral convex base having less wall thickness at its perimeter than its centre. Pref. the underside of the cap features another, shallow, coaxial recess having a base greater in dia. than that of the external passage through the boss. These details facilitate the introduction of a plug-fit insert for a central terminal.    Used for capping the mouth of an open-topped dry-cell (Li/MnO) casing of conductive matl., to contain internal electrolyte or reagents and insulate the casing electrically from a terminal contact passing through the cap.