CPC A61H 33/6005 (2013.01) [A61H 33/0087 (2013.01)] | 14 Claims |
1. A method for reinforcing a spa shell, the method comprising:
molding a thermoplastic sheet into a predetermined spa shell shape to form a shell for containing water;
spraying at least two layers of polyurethane onto an underside of the spa shell, forming an inner layer of rigidizer that is 0.2 centimeters to 1 centimeter thick;
placing at least one shield on the underside of the spa shell at a jet predetermined location to prevent a foam support layer from forming over the jet predetermined location;
applying a foam support layer that is 0.5 centimeters to 3 centimeters thick on the underside of the spa shell over the inner layer of rigidizer, the foam support layer extending from a bottom side of the underside of the spa shell, across at least one sidewall of the underside of the spa shell to a lip of the spa shell, the foam support layer forming at least one rib along the sidewall of the underside of the spa shell; and
spraying at least two layers of polyurethane onto the underside of the spa shell, forming an outer layer of rigidizer that is 0.25 centimeters to 1 centimeter thick.
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