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US 2004/0062984 A1Published application
Manganese dry battery
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKoji Inokuchi, Ryohei Ashihara, Keiji Ogino, Isao Kubo
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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKoji Inokuchi, Ryohei Ashihara, Keiji Ogino, Isao Kubo
Estimating the term…
A manganese dry battery with excellent leak-proof property is provided, in which electrolyte leakage does not occur even if the size of a positive electrode material mixture is increased to meet a demand for improvement in discharge property. In a sealing part, a first circular projection, a second circular projection and a third circular projection are arranged at the bottom in sequence from the center to the outside, and a positive electrode carbon rod supporting part is provided in an innermost periphery portion to have an interval from the first circular projection. A groove between the first projection and the carbon rod is formed to have a substantially rectangular vertical section, kraft board is pressed by flat bottom surfaces of the first and second projections and an opening of the zinc can is fitted between the second and third projections.
A manganese dry battery comprising a negative electrode zinc can, a separator positioned inside of the negative electrode zinc can, a positive electrode material mixture positioned inside of the separator, a positive electrode carbon rod, kraft board having an aperture in the center into which the positive electrode carbon rod is inserted and covering a top surface of the positive electrode material mixture and a sealing part having an aperture in the center into which the positive electrode carbon rod is inserted and sealing an opening of the negative electrode zinc can,
Dependencies are inferred from the claim text.