Applying mastic alongside weld bead

Details Applying mastic alongside weld bead Applying mastic alongside weld bead

1977-03-24

1978-11-21

Kaplan, Morris

Coating processes

Nonuniform coating

Striping

118413, 138171, 427356, B05D 140

Patent

active

041267184

ABSTRACT:
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.

REFERENCES:
patent: 2454821 (1948-11-01), McKee
patent: 2798456 (1957-07-01), Pearson
patent: 2927371 (1960-03-01), Hays

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