Shoe insole consists of curved, springy steel plate which carries elastic support for ball of foot which is attached by bolt in threaded sleeve and prevented from twisting by rods which are welded or riveted to plate

摘要

Shoe insole consists of a curved, springy steel plate which carries an elastic support (5) for the ball of the foot. This is attached by a bolt (10) in a threaded sleeve (9) and prevented from twisting by rods (11) which are welded or riveted to the plate.