Plastic and nonmetallic article shaping or treating: processes – Outside of mold sintering or vitrifying of shaped inorganic... – Including plural heating steps
Patent
1975-11-06
1977-02-22
Corbin, John J.
Plastic and nonmetallic article shaping or treating: processes
Outside of mold sintering or vitrifying of shaped inorganic...
Including plural heating steps
264258, 350105, G02B 512
Patent
active
040089495
ABSTRACT:
A protective helmet having an internal integral layer of reflective material and the method of constructing the same is disclosed. A first layer of catalyzed clear gel coat is sprayed under pressure into a helmet mold and allowed to dry. A second fog layer of clear gel coat is sprayed over the first layer to form a tacky surface upon which small double sided reflective chips can be sprinkled and brushed flat. The second gel coat is then dried thoroughly. A third backing layer of clear gel coat containing metal flakes is then sprayed over the second layer and completely dried. A layer of saturated fiber-glass mat is applied over the third layer to seal in the reflective chips and to eliminate any air pockets. Layers of fiberglass cloth are then applied over the mat and the fiberglass is completely dried. The helmet is popped from the mold, sanded and finished.
REFERENCES:
patent: 3252376 (1966-05-01), DeVries
patent: 3469898 (1969-09-01), Altman
patent: 3577561 (1971-05-01), Oshima
patent: 3871336 (1975-03-01), Bergman
Corbin John J.
DELOS Reyes B. Wm.
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