Flat primary battery and cell unit

Claim 1

A PRIMARY CELL ELEMENT COMPRISING AN INTEGRAL ENCIRCLING, NON-CONDUCTIVE WALL, A ZINC PLATE HAVING ITS ENTIRE PERIPHERY EMBEDDED IN AND EXTENDING BETWEEN THE INNER SURFACES OF THE WALL AND DEFINING UPPER AND LOWER RECESSED THEREWITH; A COMPOSITE CRUSH-RESISTANT, PROTECTIVE SURFACING ON THE UPPER SURFACE OF THE ZINC PLATE AND INTEGRAL WITH THE WALL, SAID PROTECTIVE SURFACING BEING A FORAMINOUS MEMBER OF DIELECTRIC PLASTIC HAVING AT LEAST ONE APERTURE DEFINING A POCKET; A COMPRESSED, ELECTROLYTE-IMPERVIOUS, CONDUCTIVE CARBONACEOUS EMBEDMENT IN THE POCKET, SUBSTANTIALLY FLUSH WITH THE SURFACE OF THE PLASTIC MEMBER AND LATERALLY SUPPORTED BY THE WALL OF THE POCKET, AND BEING IN A GOOD MECHANICAL AND ELECTRICAL CONTACT WITH THE ZINC PLATE AND FORMING A DUPLEX ELECTRODE THEREWITH; A TAMPED DEPOLARIZER MASS COMPRISED ESSENTIALLY OF GRANULAR MANGANESE DIOXIDE, IN THE UPPER SAID RESCESS IN MECHANICAL AND ELECTRICAL CONTACT WITH THE COMPOSITE CARBON COLLECTOR MASS AND PROTECTIVE SURFACING, AND AN IMMOBILIZED ELECTROLYTE IN THE LOWER RECESS IN GOOD MECHANICAL AND ELECTRICAL CONTACT WITH THE ZINC PLATE.