Method of piercing a plate, of any configuration, with a very high perforation density and products thus obtained
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United States of America Patent
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Mar 3, 1992
Grant Date -
N/A
app pub date -
Feb 9, 1990
filing date -
Feb 13, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention is directed to a method of forming a large number of holes in a given area. A plurality of tools spaced along X and Y axes are used to form holes simultaneously, and the tools are successively moved in steps to drill more holes.
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