Patent ID: 7169507

Claim:
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, wherein the sealing part includes a first circular projection pressing said kraft board, a second circular or substantially circular projection pressing said kraft board arranged at the bottom in sequence from the center to the outside, and a third circular projection provided outside of the second circular or substantially circular projection; a positive electrode carbon rod supporting part provided inside of the first circular projection in an innermost periphery portion; and a groove formed between the first circular projection and the positive electrode carbon rod, wherein an opening of the negative electrode zinc can is fitted between the second circular or substantially circular projection and the third circular projection.