Method of making an overhead door panel

Details Method of making an overhead door panel Method of making an overhead door panel

1987-08-06

1988-10-25

Echols, P. W.

Metal working

Method of mechanical manufacture

Assembling or joining

295251, B21D 3900

Patent

active

047793252

ABSTRACT:
An overhead garage door panel (9) having a front sheet metal skin (10) and a rear skin (11) of insulating material and a core (12) of synthetic foam between the skins, the marginal edges of said metal skin (10) being progressively formed into folded over hems (24) of double thickness, said hems (24) then being further progressively roll-formed into rearwardly disposed upwardly offset upper and lower channels (20) and (20') extending longitudinally of said panel (9), and applying vertical metal end stiles (13) to the ends of said channels (20) and (20') to enclose the ends of said core (12).

REFERENCES:
patent: 2209070 (1940-07-01), Bridgman
patent: 3479784 (1969-11-01), Massagli
patent: 3612582 (1971-10-01), Pitner
patent: 3740916 (1973-06-01), Kenaga
patent: 3967671 (1976-07-01), Stanley et al.
patent: 4132042 (1979-01-01), DiMaio
patent: 4284119 (1981-08-01), Martin
patent: 4339487 (1982-07-01), Mullet
patent: 4379480 (1983-04-01), Kempel et al.
patent: 4583796 (1986-04-01), Nakajimi et al.

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