Printing – Embossing or penetrating
Reexamination Certificate
2006-06-06
2006-06-06
Hirshfeld, Andrew H. (Department: 2854)
Printing
Embossing or penetrating
C083S061000, C083S062000, C083S062100, C083S063000
Reexamination Certificate
active
07055426
ABSTRACT:
A positive piece engagement indicator for marking tool is provided in which a metal workpiece is contacted with a workpiece contact probe for providing physical contact with, as well as electrical communication with the metal surface of a workpiece. A test voltage and indicator means are placed in series between the workpiece and marking tool. Upon physical contact of the marking tool engagement surface with the surface of the metal workpiece, a circuit is completed by the electrical communication there between, thereby engaging the indicator means. This allows positive verification of actual engagement of worktool to workpiece.
REFERENCES:
patent: 3645156 (1972-02-01), Meyer et al.
patent: 4391358 (1983-07-01), Haeger
patent: 6578567 (2003-06-01), Oh et al.
patent: 6719468 (2004-04-01), Gatta
patent: 2002/0185121 (2002-12-01), Farnworth et al.
Gugliotta John D.
Hirshfeld Andrew H.
Williams Kevin D.
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