Abstract: This invention relates to a method of making a storage battery plate grid comprising the steps of casting a series of grids between the continuous cylindrical patterned end surface of a rotating drum and a smooth surfaced co-operating shoe, cropping said series of grids, said rotating drum being patterned to form said grids with one smooth side, with a perimeter frame, with a lattice network within said frame and with said perimeter frame of a greater thickness than said lattice network; flattening said grids supporting the grids and displacing the lattice network portion of said grid to dispose the principal plane of the lattice network portion thereof between the spaced apart planes of the opposed faces of said perimeter frame.

Abstract: This invention relates to a battery plate grid of the type that are cast from lead and which have a perimeter frame and a lattice network of bars formed integrally with the frame. The plate grid has protuberances spaced apart on one side only of the lattice network and formed integrally therewith. The perimeter frame has a greater thickness than the lattice network and the principal plane of the lattice network is between the spaced apart planes of opposed face surfaces of the perimeter frame. The protuberances on one side of the lattice network have a height of about one-half the difference in thickness between the lattice network and the perimeter frame so that the outer extremities of the protuberances are in the plane of one face of the frame and serve to rigidify the lattice network during application of the paste.