| 摘要 |
<p>An improvement is accomplished in apparatus for the continous production of tubing from the tubing stock, and like, elongated, closed structures from appropriate stocks. The apparatus welding occurring at a welding station. Downstream of the welding station (22) are stations for the further processing of the tubing after welding, which generate conditions adverse to interior coatings. In apparatus as described, the improvement comprises several inventive features. A spray head (38) provides for spraying of coating, and fits within the tubing. An elongated, flexible lance (58) locates the spraying means downstream of the processing stations which generate adverse interior coating conditions. A cooling jacket extends along the lance from the point of introduction to the spray head, and cools the supplied coating material to protect against high temperature damage.</p> |
