Patent ID: 7258940

Claim:
A metal/air depolarized button cell comprising an anode can comprising an open end and opposing closed end with an integral side wall therebetween and said anode can has a peripheral edge at the open end thereof and an integral ledge jutting from a portion of said peripheral edge into the cell interior; a metal support disk inserted into the open end of said anode can to close said open end; an anode material comprising zinc particles, and aqueous alkaline electrolyte within said anode can; wherein said metal support disk has a disk-shaped body and a circumventing peripheral edge and at least one air hole through said body; said cell further comprising an insulating sealing material wherein at least a portion of said insulating sealing material lies between the metal support disk and the anode can to electrically insulate said metal support disk from the anode can, and a cathode underlying said metal support disk when the cell is viewed in vertical position with the metal support disk on top; wherein said anode can has an inside surface facing towards the cell interior and an outside surface facing away from said cell interior; wherein said insulating sealing material abuts a greater portion of the inside surface of said anode can than the outside surface of said anode can; wherein at least a portion of the insulating sealing material sits on said ledge jutting from a portion of the peripheral edge of said anode can; wherein said ledge is sufficiently narrow in width that said ledge does not intersect the path of a downward orthogonal projection of any portion of said cathode, when the cell is viewed in vertical position with the metal support disk on top; and wherein said insulating sealing material has an integral skirt extending downwardly passed said ledge, when the cell is viewed in vertical position with the metal support disk on top.