Electric resistance furnace
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Apr 1, 2004
app pub date -
Sep 30, 2003
filing date -
Sep 30, 2002
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The invention provides an electric resistance furnace comprising an axially vertical, hollow center heating element, a center furnace body that comprises a heat-insulating member and is provided for supporting the center heating element, and a preheating means that is provided at a gap from the surface of the center furnace body and comprises a preheating element provided on the inner wall surface of a cylindrical heat-insulating member. A heat-insulating member is located at an upper surface and a lower surface of an outer heat-insulating member located around the preheating member and only on a center axis side of the furnace with respect to the area of projection of the preheating means.
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