Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1991-07-17
1994-06-28
Falik, Andrew M.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 466, 264222, 2411, 2414, A42B 300, B29C 3348
Patent
active
053244605
ABSTRACT:
A method forms a helmet liner which during its formation is fitted to the head of the user, by forming an inflatable liner element of extensible sheet material approximately conforming to the shape of the interior surface of a helmet shell, providing the element with respective foam filling and vent passages, the vent passages serving to expel air from the liner as foam filling proceeds, mounting the liner element in the helmet on the head of the user, supplying foam to the foam filling passages to inflate the liner element, expel air therefrom and conform the element at an outer surface to the shape of the interior surface of the helmet shell and at an inner surface to the shape of the head of the user, allowing time for curing of the foam admitted to the liner element, and severing parts of the vent and foam filling passages projecting from the liner. The liner element can embrace a forehead portion only of the head of the user or a further element which embraces a rear part of the head can be added. In another form embodiment, the liner element may cover the crown, front and rear of the head of the user.
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Falik Andrew M.
Helmets Limited
Neas Michael A.
LandOfFree
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