Patent ID: 7579105

Claim:
A primary electrochemical cell comprising a negative and a positive terminal and an elongated outer housing having a closed end and opposing open end, and an end cap assembly inserted therein closing said housing, wherein said cell has a central longitudinal axis running in the direction of elongation of said housing, wherein the end cap assembly comprises an end cap, and an insulating sealing member underlying said end cap, and a support member between said end cap and said insulating sealing member, when the cell is viewed in vertical position with the end cap assembly on top; said support member being formed of a support disk of single piece metallic construction having a first group of vent apertures and a second group of vent apertures therethrough, wherein each of said groups of vent apertures comprises at least a plurality of individual apertures, wherein the vent apertures in said first group are spaced apart from the vent apertures in said second group in the radial direction away from the cell's central longitudinal axis.