Method and apparatus for the continuous forming, galvanizing and coloring of tubing

Abstract

Abstract The continuous forming, galvanizing and coloring of tubing wherein the continuously formed and galvanized tubing is overcoated with a color coating as a continuous operation with the tue forming and galvanizing by advancing the tubing after the galvanize coat has been set through processing steps of coating the galvanized surface with a color coating composition formulated of a hardenable resinous vehicle containing a diluent and a tinctorial agent, rapidly heating the coated tubing to drive off the diluent and set the resinous base without bubble formation, cooling the heated tubing to harden the resin, engaging the tubing between driving rolls located upstream of the coating and heating sections to pull the tubing through said processing sections while supporting the tubing to avoid contact with the surface of the tubing from the time that the coating composition is applied until it is set and then straightening and cutting the colored tubing to lengths, and including means adjacent the path of travel of the tubing in a straight line through the said processing sections for detecting deviations of the tubing from the normal line of travel and means responsive to any such deviations for shutting down the entire line.

Inventors

• 👤 Alfred F Mailhiot
• 👤 Paul J Hreha

Bibliographic Details