Abstract: Newly formed battery plates are fed singly edgewise into radially open pockets in a first transfer wheel, while a like number of wrapper sheets are folded in half and pressed radially into pockets in a second transfer and sealing wheel. Vacuum plates in the sides of the pockets in the second transfer wheel hold the wrapper sheets open. Both wheels rotate step by step, and each plate is released to fall by gravity between folded sides of each wrapper. Centering rails carried around segment of second wheel pass through notches in edges of wrapper sheet to center battery plate in wrapper. Plates and wrappers carried by second wheel then pass hot air jets to soften edge of wrapper sheet; after which clamp blades carried by sides of vacuum plates are cammed closed to seal side edges of wrapper sheets over side edges of each plate. Clamp plates then open, and wrapped battery plate is released and delivered by gravity from second transfer wheel to off-feeding conveyor.