Apparatus for vacuum impregnation of a flexible, hollow tube

Fluent material handling – with receiver or receiver coacting mea – Evacuation apparatus

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141392, 264269, B29C 6326, B65B 3104

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056998384

ABSTRACT:
An apparatus and method for removing air from a tube to improve the impregnation of the tube with a curable resin or other viscous fluid used in cured-in-place pipe rehabilitation. Also, a perforated needle for use in vacuum impregnation and a method of evacuating air from a flexible tube, particularly a lining tube used for rehabilitation of underground conduits.

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