Patent ID: 8136381

Claim:
A hog ring fastening device comprising: a body; a magazine attached to the body; jaws pivotally supported on the body; a main pneumatic cylinder for moving the jaws toward or away from each other; a feed pneumatic cylinder fixed to the body, wherein the feed pneumatic cylinder includes a main body and a piston rod, and the piston rod is adapted to be moved toward an inside of the main body when the jaws are moved away from each other; a moving plate attached to the piston rod of the feed pneumatic cylinder; a push spring around the piston rod for pushing the moving plate in a feed direction with respect to the main body of the feed pneumatic cylinder; a feed member located on the moving plate; and a stopper attached to the body of the hog ring fastening device for preventing a hog ring assembly loaded on the magazine from moving in a direction opposite to the feed direction.