Method for inhibiting algae growth in water tanks and apparatus therefor
AssigneeBourgault Industries Ltd.
InventorNeil Eisner
Life of this patent
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Abstract
A method of inhibiting the growth of algae and like organisms in plastic water tanks exposed to sunlight comprises providing an outer tank surface operative to reflect off a substantial portion of sunlight that hits the tank off the outer tank surface; and providing an opaque inner tank layer operative to substantially prevent sunlight passing through the outer tank surface from entering an interior of the tank. A two layer tank is provided comprising a light colored outer layer and a dark sun-blocking inner layer, and is conveniently made by a rotational molding process.
Claims4
A method of rotationally molding a plastic water tank operative to inhibit the growth of algae when exposed to sunlight, the method comprising:
- heating and turning a rotational mold to melt a first portion of resin granules and form a light colored outer tank layer of the tank having an outer surface operative to reflect off a substantial portion of sunlight that strikes the outer tank surface;
- and
- after forming the light colored outer tank layer, heating and turning the rotational mold to melt a second portion of resin granules and form a dark colored inner tank layer of the tank operative to substantially prevent sunlight passing through the outer tank surface from entering an interior of the tank.
Dependencies are inferred from the claim text.