Apparatus for welding with preheated filler material
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United States of America Patent
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Sep 28, 1999
Grant Date -
N/A
app pub date -
Jul 17, 1997
filing date -
Jul 17, 1997
priority date (Note) -
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Abstract
A hot-wire nozzle for feeding pre-heated filler material into a welding groove. The nozzle has a contact tube made of electrically conductive material surrounded by a thin structural outer sheath. The outer sheath is electrically insulated from the contact tube by means of layers of electrically insulating material sandwiched between the contact tube and the outer sheath. The contact tube is configured to feed two or more filler wires simultaneously.
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