Plastic and nonmetallic article shaping or treating: processes – Repairing or restoring consumer used articles for reuse
Patent
1980-06-02
1982-04-06
Arola, Dave W.
Plastic and nonmetallic article shaping or treating: processes
Repairing or restoring consumer used articles for reuse
26432813, 285 15, 285 21, 285297, B29H 506
Patent
active
043235263
ABSTRACT:
A method for sealing leaking pipe joints comprises installing and securing a flexible mold around the pipe joint. The pipe joint and the mold are then preheated to within a predetermined temperature range and a chemically settable, flexible fluid sealing material is injected into the mold. The sealing material is cured by maintaining the pipe joint and the interior of the mold within the predetermined temperature range. The injection rate of the sealing material is preferably increased by decreasing the pressure of the interior of the mold. Proper sealing may be facilitated by increasing the pressure within the mold while the sealing material is curing.
REFERENCES:
patent: 2259282 (1941-10-01), Williams et al.
patent: 3178793 (1965-04-01), Rosengarten et al.
patent: 3196488 (1965-07-01), Hinton et al.
patent: 3865662 (1975-02-01), Segal
patent: 3927158 (1975-12-01), Croft
patent: 4165358 (1979-08-01), Johnson
"Remedial Procedures for Handling Leakage of Cast Iron Mains", Ford, Bacon & Davis/West Chester Chemical Co., Advertising Brochure, .COPYRGT.1964.
"Keyhole Technique for Externally Sealing Bell and Spigot Joints", W. G. Hickle; American Gas Journal, May, 1965.
Arola Dave W.
Rubco Products, Inc.
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