Pipe joints or couplings – Roof or floor drain flashing type
Patent
1981-04-27
1985-07-02
Arola, Dave W.
Pipe joints or couplings
Roof or floor drain flashing type
285284, 285330, 285423, 264273, E04B 548
Patent
active
045264074
ABSTRACT:
A roof flashing and method of making same in which both the collar and base member of the flashing are made of elastomeric material. The base member is molded first and has an opening therein surrounded by a stepped flange provided with a series of circumferential slots therein. The collar is molded onto the base member during a subsequent molding operation in which the material of the collar is injected through the slots and completely around the top, bottom and inner side edge of the flange to form a series of closed loops thus providing a positive mechanical lock between the collar and base member. Also, the heat of the elastomeric material of the collar during the second stage molding process causes some melting of the elastomeric material of the base member whereby the collar and base are also fused together.
REFERENCES:
patent: 1287235 (1918-12-01), Cole
patent: 1615925 (1927-02-01), Buckles et al.
patent: 4265058 (1981-05-01), Logsdon
Arola Dave W.
Oatey Co.
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