Door panel and manner of making same
OwnerWillis J. Mulletinventor
Life of this patent
Estimating the term…
Abstract
A door panel A,B having inner and outer skins 10 and 11, 110 and 111 and a rigid expanded core 15,115, filling the cavity between the skins with stiles 19,119 extending across the ends of the cavity, said panel being made by the method comprising continuously supplying two strips of sheet material 10c,110c and 11a,162b, spraying the under-surface of strip 11a,162b with expansible thermal insulating foam 34,134, bringing the strips together and moving them under heat and pressure in pressure conveyor F to expand the foam and fill the cavity between the strips, progressively forming marginal sealing portions 11b,160 of strip 11a,162b into sealing relation with the contoured edges 12,112 and 14,114 of the other strip at stations G and H, and shearing the moving composite strip into lengths at station I.
Claims22
An overhead door panel having an inner skin having longitudinal ribs extending in a direction away from the panel and an outer skin forming a cavity between said skins, a rigid core of expanded foam thermal insulating material in said cavity and bonded to the surfaces of the skins, at least the inner skin formed of metal and having contoured side edges for conforming to like edges on like panels, stiles in the cavity extending along the ends of the panel, and means bonding the marginal edges of said outer skin to said contoured edges.
An overhead door panel having an inner skin having integral hollow longitudinal exterior ribs extending in a direction away from the door panel and an outer skin forming a cavity between said skins and extending into said ribs, a rigid core of expanded foam thermal insulation material in said cavity, and bonded to the surfaces of the skins, at least the inner skin formed of metal and having male and female contoured side edges for conforming to like edges on like panels, and means connecting the marginal edges of the inner and outer skins.
Dependencies are inferred from the claim text.