Door Apparatus and method of making door

Static structures (e.g. – buildings) – Composite prefabricated panel including adjunctive means – Sandwich or hollow with sheet-like facing members

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Details

52455, 5278312, 52316, 52779, D25 48, E06B 372, E04C 254

Patent

active

057820554

ABSTRACT:
Door apparatus includes a perimeter frame and material inwardly from the perimeter frame has been removed from both sides of the door asymmetrically to allow the inner portion of the door to warp in response to temperature and/or humidity conditions without affecting the planar nature of the door perimeter frame. The perimeter frame remains in its original, planar, configuration so as to remain true regardless of the warping of the interior portion of the door due to temperature and/or humidity. The method of making the door includes the asymmetrical removal of the material from the inner portion of the door inwardly from the perimeter door frame on both sides of the door to provide relatively thin webs between relatively thick door portions.

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patent: 5540026 (1996-07-01), Gartland

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