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US 4,009,625 AGranted
Self-stripping punch with ears
AssigneeBernal, Inc.
InventorPaul D. Pfaff
Life of this patent
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Abstract
A side outlet, self-stripping punch adapted to be mounted in a bore in a die board. The self-stripping punch includes an elongated, cylindrical base having a cutting edge on the top end and a pair of locking ears on the bottom end to prevent rotation of the punch in the die board. The locking ears are formed by upsetting them from the punch base, and they each have a flat face disposed on a common plane passing through the longitudinal axis of the punch.
Claims3
In a side outlet, self-stripping punch for mounting in a die board, the combination comprising:
- a. a cylindrical, elongated punch base provided with a cutting edge on the top end thereof;
- b. at least one integral locking ear formed on the periphery of the punch, adjacent the bottom end of the punch, for retaining the punch against rotation in a die board;
- c. said locking ear being provided with a flat face on one side thereof which is disposed on a plane that passes through the longitudinal axis of the punch;
- and,
- d. said locking ear being formed on the other side thereof in the form on an arcuate web.
2 more elements
Dependencies are inferred from the claim text.