Doors

Details Doors Doors

1978-05-03

1980-05-27

Murtagh, John E.

Stock material or miscellaneous articles

Two dimensionally sectional layer

With frame, casing, or perimeter structure

296146, 428322, 5230911, B60J 504

Patent

active

042051061

ABSTRACT:
A light weight door for a caravan is made as a sandwich from two panels with an infilling of a wooden frame consisting of rails and stiles which are not jointed together, and with blocks of expanded polystyrene filling the spaces between the rails and stiles, these blocks being initially thicker than that of the wooden frame parts, and all of the parts being bonded together so that the blocks become compressed. The bonding makes the door concave convex at the latch edge but planar at the hinge edge. The door has rounded corners.

REFERENCES:
patent: 1374580 (1921-04-01), Kepley
patent: 3058550 (1962-10-01), Richter
patent: 3349525 (1967-10-01), Payne
patent: 3629046 (1971-12-01), Gilbert
patent: 3697633 (1972-10-01), Edgar
patent: 4054477 (1977-10-01), Curran
patent: 4073674 (1978-02-01), Hortel

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