Positive piece engagement indicator for marking tool

Details Positive piece engagement indicator for marking tool Positive piece engagement indicator for marking tool

2006-06-13

2006-06-13

Hirshfeld, Andrew H. (Department: 2854)

Printing

Embossing or penetrating

C101S019000, C083S062000, C083S063000, C083S074000

Reexamination Certificate

active

07059243

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: 3747142 (1973-07-01), Arbogast et al.
patent: 4391358 (1983-07-01), Haeger
patent: 6698323 (2004-03-01), Formon et al.
patent: 6719468 (2004-04-01), Gatta

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