Grooving and stamping method and apparatus

In an apparatus for grooving a tubular post comprising a main framework, a pair of closely spaced drive rollers journaled to the main framework having axes parallel to one another and together defining a support surface between the rollers for a tubular post, motivator means connected to drive each of the rollers in the same direction and thereby rotate a tubular post in an opposite direction, a grooving carriage movably connected to the main framework, a grooving roller journaled to the grooving carriage having a plurality of spaced apart grooving tools along the length thereof with the axis of the grooving roller parallel to the axes of the drive rollers, means shifting the grooving carriage and the grooving roller toward and away from the drive rollers so that the grooving tools thereon engage a post supported by the drive rollers to thereby groove the post, the improvement according to which the grooving roller is substantially larger in diameter than a post to be grooved, stamping means arranged along the length of the grooving roller comprising individual dies, one die positioned near each of substantially all of the grooving tools, and control means arranged to allow engagement of the grooving tools with a post during approximately one revolution of the grooving roller to thereby eliminate double stamping of the post.