Rotary punching machine
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United States of America Patent
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Oct 6, 1992
Grant Date -
N/A
app pub date -
Jan 16, 1991
filing date -
Aug 10, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A rotary punching machine comprises a pair of punching tools, namely a rotary punching tool with punches arranged on its circumference and a rotary counter tool, which co-operates with the latter, with dies in the form of punching bushings arranged on its circumference. One of the punching tools (1) and the counter tool (3) has a radial groove (12) on its circumferential surface between the respective individual punches (2) or the individual punching bushings (4), the depth of the groove being greater than the depth of penetration of the punches (2) into the punching bushings (4).
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