Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
James S. Franco0
Thomas K. Litzenberger0
Date of Patent
December 15, 2009
Patent Application Number
12146859
Date Filed
June 26, 2008
Patent Citations Received
Patent Primary Examiner
Patent abstract
A process for cold forging a metal fastener such as a self-clinching standoff includes a punch and die set at the final head trimming station which produces the shear burr only on the underside of the fastener head where it is not visible after installation. A knock-out pin which is reciprocal within the bore of the punch forcibly ejects the fastener through a passage in the die to a point beyond an opposite side of the die. A stripper sleeve which is reciprocal about the outside surface of the punch then moves from a retracted position over the end of the punch pushing a residual scrap ring from around the outside of the punch.
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