FIELD: primary cells. SUBSTANCE: polypropylene cap 6 with annular groove is installed in cylindrical case 1 of lithium cell and annular projection 7 of case is turned tight in this groove with negative allowance; then metal part areas mating cap 6 are heated by induction currents to 250-300 C. In the process, polypropylene tends to acquire original state and tightly compresses metal surfaces ensuring adequate adhesion throughout entire area of mating parts. EFFECT: improved reliability of sealing. 3 cl, 5 dwg
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