H. C. Price Co.

Howard W Christie

Walter D Hodge

A device for applying mastic material to the weld bead area of longitudinally welded pipe is the subject of this application. An extruder is mounted on a framework and receives mastic material in rope form from a bulk spool positioned above the extruder. The extruder incorporates heating elements to raise the temperature of the mastic. The extruder is provided with dual orifices for depositing a layer of the mastic material on either side of the weld bead of the pipe. A doctor blade is mounted to move along the pipe extending from the weld bead to a point on the pipe surface to smooth the mastic material which has been deposited. The doctor blade smooths the material evenly and causes it to form a bridge between the apex of the weld bead and a point on the pipe surface adjacent the base of the weld bead.

Apparatus for use in coating longitudinally welded pipe

A device and method for applying mastic material to the weld bead area of longitudinally welded pipe is the subject of this application. An extruder is mounted on a framework and receives mastic material in rope form from a bulk spool positioned above the extruder. The extruder incorporates heating elements to raise the temperature of the mastic. The extruder is provided with dual orifices for depositing a layer of the mastic material on either side of the weld bead of the pipe. A doctor blade is mounted to move along the pipe extending from the weld bead to a point on the pipe surface to smooth the mastic material which has been deposited. The doctor blade smooths the material evenly and causes it to form a bridge between the apex of the weld bead and a point on the pipe surface adjacent the base of the weld bead.

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Kansas City, MO, United States of America

Howard W Christie