Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1974-03-18
1976-01-27
Whitby, Edward G.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
2 3R, 264 454, 264 51, 264321, 428315, 428322, 156250, B32B 520
Patent
active
039350444
ABSTRACT:
A method is disclosed for producing a protective helmet, the method comprising placing an inner shell having a dome portion and downwardly extending side portions on a die, positioning a further die so that a cavity is provided between the outer surface of the inner shell and the further die, filling the cavity with pre-foamed beads of polystyrene of selected density, and applying heat to expand the beads to create a continuous layer of shock absorbing material extending over the whole outer surface of the inner shell. Additionally, and subsequent to the formation of the layer of shock absorbing material, an outer covering may be applied to the outer surface of the shock absorbing material to provide a double-skin helmet.
REFERENCES:
patent: 2814043 (1957-01-01), Alesi
patent: 2901750 (1959-09-01), McMurray
patent: 3273162 (1966-09-01), Andrews
patent: 3277220 (1966-10-01), Plymale et al.
patent: 3344222 (1967-09-01), Shapiro et al.
patent: 3465363 (1969-09-01), Raney
patent: 3471866 (1969-10-01), Raney
patent: 3624663 (1971-11-01), Jones
patent: 3627162 (1971-12-01), Dossin
patent: 3684633 (1972-08-01), Haase
patent: 3691265 (1972-09-01), Cobbledick
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