Sewing machine for athletic ball, has pair of horizontal rotary shuttles with needles, and lower and upper feeders to feed cloth to be sewn by equal pitch, and presser foot presses cloth during seam formation

摘要

A pair of horizontal rotary shuttles (15, 16) with the needles (20, 21), are arranged such that both shuttles are rotated in same direction. The lower and upper feeders (34, 42) at lower and upper sides of the cloth to be sewn, feeds the cloth by equal pitch. A presser foot (53) presses the cloth, during formation of seam.