PURPOSE: To prevent the evolvement of the dislocation of a positive plate caused by the evolvement of portions having different thickness at the upper and the lower portion of the positive plate due to an insulating tape in constituting a spiral plate group, using the positive plate in which a lead plate and the insulating tape are stuck on the separating portion of a mix.
CONSTITUTION: The separating portion 3 of a mix having a width 1/3-1/2 of a positive plate width from the upper side of a long positive plate 7 toward its inside is formed. A lead plate 4 is connected to the separating portion 3. An insulating tape 5 is stuck to the surface of the lead plate 4 and that of the separating portion 3. The insulating tape 5 is stuck to the surface of the plate at the lower portion of the insulating tape 5 from the lower side of the positive plate toward its inside. The exposed portion 6 of the positive plate mix 2 is presented between the upper and the lower insulating tape 5.
SHIGEMATSU TOSHIO
OO FUMIO
