| 摘要 |
<p>TITLE OF THE INVENTION: "METHOD OF COVERING A PIPE, ESPECIALLY A STEEL PIPE, AND OTHER METALLIC ARTICLES WITH THERMOPLASTIC SYN THETIC MATERIAL" A method of covering a metallic pipe and other metallic articles with thermoplastic synthetic material, especially polyethylene, according to which the synthetic material is in the form of a foil leaving an extruder helically wound upon a heated-up rotating steel pipe. The thus applied foil is by means of a roller pressed onto the pipe to be covered. Prior to the foil contacting the steel pipe, the foil is passed over the pressing roller through an angle range of from 25 to 50.degree..</p> |
