Holder means for the partial thermal treatment of workpieces
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United States of America Patent
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May 23, 1995
Grant Date -
N/A
app pub date -
Dec 3, 1993
filing date -
Jan 30, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A holder means for the partial thermal treatment in an oven, especially a cuum chamber oven that provides compressed gas quenching, of tools or workpieces, especially drill bits, that have a working portion and a portion that is to be clamped. The workpieces, which are guided by a base plate that is provided with holes, rest upright upon a bottom plate. The base plate is provided with a radiation shield on that side that faces the oven chamber. The upper surface of the radiation shield has a high emission factor for thermal radiation, and the radiation shield is disposed directly on the base plate.
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