Slug-retaining die
AssigneeWilson Tool Company
InventorEdwin T. Shuttleworth
Life of this patent
Estimating the term…
Abstract
The die of a punch press is provided with at least one inwardly-extending protrusion elongated in the direction of travel of the punch and positioned to encounter and grip the edge of a punched slug of workpiece material during the punching step and to restrain the slug from following the punch during the retraction step of the punch.
Claims6
A punch press comprising a punch and a die having an opening receiving the punch during punching and retraction steps in a material-punching operation, the die having a face normally facing the punch, and including at least two inwardly-extending, elongated protrusions positioned and dimensioned to encounter and grip solely the peripheral edge of a punched slug of workpiece material that exceeds the corresponding punch dimension during the punching step and to restrain the slug from following the punch during the retraction step, the at least two protrusions being elongated in the direction of punch travel and being spaced in the direction of punch travel from said die face.
Dependencies are inferred from the claim text.