Tend machines that attach protective metal strike-plates to folding rule.
What does a Protector Plate Attacher do?
Tends machine that attaches protective metal strike-plates to wooden segments of assembled folding rule: Mounts reels of metal strip on machine spindles and threads strip ends through feed mechanism. Holds unfolded rule against guides and starts machine that cuts off, forms, and fastens pronged protector-plate to each segment of rule. Removes spilled and jammed plates from mechanisms, using screwdriver.