Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1976-03-05
1977-08-23
Whitby, Edward G.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
4173R, 156256, 156293, 156299, 264225, B32B 3500
Patent
active
040438538
ABSTRACT:
One bathtub of an identical series of bathtubs has its surface protruding drain and overflow fittings removed, the exposed surfaces of the existing bathtub are lined with Plasterine of a thickness equal to a fiberglass liner to be full surface glued to the existing tub and a fiberglass working mold thickness, a layer of wet plaster of Paris is applied to the Plasterine lined bathtub, reinforced and dried to form an initial mold which is then removed from the Plasterine lined existant bathtub. The outer surface of the plaster of Paris initial mold is waxed and buffed to a high gloss finish. A thin fiberglass and resin working mold is layed up on the outer surface of the initial mold after applying a mold release agent. The working mold is finished off with a gel coat which, upon hardening, is buffed and waxed. A gel coat for the fiberglass tub liner is applied to the outer surface of the working mold and a coating of flame retardant polyester resin mix is hand layed or sprayed over the gel coat to produce a finished liner which is pulled or popped from the mold. The outer surface of the liner is applied with adhesive as is the exposed surface of the bathtub, and the liner is adhesively fixed to the bathtub over its full surface. The original drain and overflow fittings are refitted to formed holes within the liner corresponding to those of the drain and overflow openings of the existing bathtub.
REFERENCES:
patent: 2695256 (1954-11-01), Olloqui et al.
patent: 2784417 (1957-03-01), Stand
patent: 2853714 (1958-09-01), Darmstadt
patent: 3213497 (1965-10-01), Scott
patent: 3931651 (1976-11-01), Weir
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