Process for producing a plastic sealing element for a galvanic p

Metal working – Method of mechanical manufacture – Electrical device making

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429172, 429185, H01M 208

Patent

active

050491628

ABSTRACT:
A plastic sealing element for dry cells includes a radially symmetrical, contrally perforated base element, the upper side of which is provided with an elastomeric sealing material which is extruded in the form of a circumferential annular bead, and a process for its manufacture. After the sealing element is pre-assembled with the cell's metal housing cover and the cell is assembled, the annular bead is pressed flat during final crimping so that a sealing zone having a small cross section and defining a long leakage path is developed between the cover and the base element, effectively preventing the leakage of electrolyte or water vapor, which is especially diffuse from the cell's porous carbon rod conductor, into the cell's sealing zone.

REFERENCES:
patent: 3953240 (1976-04-01), Fullenback et al.

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