Continuously manufactured colored metallic products and method of manufacture of such products
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United States of America Patent
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Aug 2, 2011
Grant Date -
Nov 10, 2005
app pub date -
Nov 6, 2003
filing date -
Mar 19, 2003
priority date (Note) -
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Abstract
Metallic tube, pipe and conduit are made in a continuous process that includes a zinc galvanization stage, a first passivation stage, a second passivation stage and a third passivation stage. A colorant is added to the tube, pipe or conduit during the continuous manufacturing process, and the colorant imparts the appearance of a color, such as red. The continuous movement of the tube, pipe or conduit is not halted during normal operation of the tube, pipe or conduit manufacturing and coloring process.
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