Apparatus and method for forming water stops on insulated pipe

Details Apparatus and method for forming water stops on insulated pipe Apparatus and method for forming water stops on insulated pipe

1975-10-01

1977-08-09

Lusignan, Michael R.

Coating processes

Vacuum utilized prior to or during coating

118 50, 118DIG4, 118DIG11, 156244, 264 90, 264 91, 264173, 427295, 427296, B05D 300

Patent

active

040411982

ABSTRACT:
Apparatus usable in combination with means for extruding a waterproof plastic sheath on foam coating on the exterior of pipe, for reducing the diameter of the plastic sheath adjacent the pipe section ends to conform to the beveled end surfaces of the foam coating and adjacent protruding marginal portions of the pipe surface and thereby form a water stop excluding moisture from the foam thus enclosed by the plastic sheath.

REFERENCES:
patent: 3082144 (1963-03-01), Haleg
patent: 3533834 (1970-10-01), Marzocchi
patent: 3661621 (1972-05-01), Jager
patent: 3755523 (1973-08-01), Straub et al.
patent: 3767454 (1973-10-01), Franke et al.
patent: 3940300 (1976-02-01), Priaroggia

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