Method and apparatus for wrapping a tape around a pipe

Details Method and apparatus for wrapping a tape around a pipe Method and apparatus for wrapping a tape around a pipe

1981-08-10

1983-02-08

Simmons, David A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

118107, 156425, 156429, B65H 8100

Patent

active

043727964

ABSTRACT:
A method and apparatus for providing a substantially void-free tape wrapping around a pipe having a longitudinal weld bead protruding from the surface thereof. While the pipe is simultaneously advanced and rotated, liquid viscous sealing material is applied to the pipe, and the applied sealing material is then doctored by means of at least one doctor blade. The doctor blade faces the advancing pipe surface, with the axis of the doctor blade at an angle of about 10.degree. to 50.degree. to the axis of the pipe, and is urged against the pipe so that it is resiliently deformed by the pipe and accommodates passage of the weld bead underneath it. In this way the doctor blade doctors the sealing material so that it provides a smooth transition between the weld bead and the adjacent pipe surfaces. The tape is then spirally wrapped around the pipe. The invention is particularly useful when a heated sealing material, eg. a hot melt adhesive, is applied to a heated pipe which is subsequently wrapped with a heated polymeric tape having the same sealing material on its interior surface.

REFERENCES:
patent: 1796691 (1931-03-01), Jansen
patent: 2044778 (1936-06-01), Halstead
patent: 3525656 (1970-08-01), Kennedy
patent: 3761335 (1973-09-01), Cichoski

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