Abstract: Apparatus for internally coating a pipe, comprising means heating a pipe as it is internally spray coated, a plurality of first rollers mounted on a first rotatable shaft having an inlet end proximate the heating means and an outlet end spaced from the heating means, and a plurality of second rollers mounted on a second rotatable shaft parallel to the first shaft and having an inlet end adjacent the heating means. Each second roller is spaced from and adjacent to a corresponding first roller in a paired relationship to thereby define a nesting groove located above the gap between each set of paired rollers. Motive means rotates the shafts and the mounted rollers to rotate the pipe within the nesting grooves of adjacent pairs of rollers. Advancing means longitudinally advances the pipe through the heating means and sequentially along the nesting grooves of adjacent pairs of rollers.

Abstract: Apparatus for internally coating a pipe, comprising a device for heating a pipe as it is internally spray coated and a plurality of inlet rollers and a plurality of outlet rollers for supporting the pipe while it is being heated and longitudinally advanced through the heating device. Each roller is spaced from and adjacent to a corresponding roller in a paired relationship to thereby define a nesting groove located above a gap between each set of paired rollers. A motive device rotates the rollers to rotate the pipe within the nesting grooves of adjacent pairs of rollers. An advancing device longitudinally advances the pipe through the heating device and sequentially along the nesting grooves of adjacent pairs of rollers. The pipe leaving the heating device is heated to a high temperature and has an increased diameter.

Abstract: Apparatus for internally coating a pipe, comprising electric heating means heating a pipe as it is internally spray coated, a plurality of first rollers mounted on a first rotatable shaft having an inlet end proximate the heating means and an outlet end spaced from the heating means, and a plurality of second rollers mounted on a second rotatable shaft parallel to the first shaft and having an inlet end adjacent the heating means. Each second roller is spaced from and adjacent to a corresponding first roller in a paired relationship to thereby define a nesting groove located above the gap between each set of paired rollers. Motive means rotates the shafts and the mounted rollers to rotate the pipe within the nesting grooves of adjacent pairs of rollers. Axial advancing means longitudinally advances the pipe through the heating means and sequentially along the nesting grooves of adjacent pairs of rollers.