PUNCH WORKING APPARATUS AND METHOD
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United States of America Patent
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Issued Date -
May 15, 2008
app pub date -
Nov 9, 2007
filing date -
Nov 9, 2006
priority date (Note) -
Abandoned
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Abstract
Embodiment, punch working apparatus has a first mold frame on which a die is mounted, a second mold frame movable toward and away from the first mold frame and a punch mounted on the first mold frame for simultaneously performing both outer and inner circumferential punching works on a sheet material between the frames, the punch containing resulted scraps in a space defined therewithin. A sub-punch is also provided, and punches an aperture having a predetermined configuration at a position of the sheet material that ends up as part of the scrap formed by and contained within the punch.
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