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US 4,685,266 AGranted
Overhead door panel and method of making
OwnerWillis Mulletinventor
Life of this patent
Estimating the term…
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).
Claims10
An overhead garage door panel comprising:
- a front sheet metal skin and a rear skin of insulating material;
- a core of synthetic resin foam enclosed between the front and rear skins and cured in place onto said front skin, said front skin having rearwardly disposed upwardly offset longitudinally extending channels for forming shiplap joints with like door panels, said channels being double-thick folded-over sheet metal and terminating in an upper and lower edge supporting said rear skin;
- and a bead formed in said edges and coextensive with said channels, said rear skin being attached by laying an adhesive along said bead and applying said rear skin thereto.
Dependencies are inferred from the claim text.