Cutting – Processes – Blanking
Reexamination Certificate
2005-08-02
2005-08-02
Peterson, Kenneth E. (Department: 3724)
Cutting
Processes
Blanking
C083S686000, C083S690000
Reexamination Certificate
active
06923100
ABSTRACT:
A punch and backer plate combination is disclosed as an example of the present invention. The punch has a concave recess in its extended end. The punch may be round or have a rectangular shape in plan view and includes a backer plate having an aligned opening with a similar shape to the punch plus a clearance dimension. The aligned opening of the backer plate includes an upper portion and a lower portion, where the lower portion is enlarged in comparison to the upper portion to allow relief for a slug of material from the workpiece.
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Birch James R.
Hansen Brad R.
Hohneke Ralph
Kleis Steven J.
Perez Melissa
Day Jones
HNI Technologies Inc.
Peterson Kenneth E.
Sandler Ronald A.
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