Static structures (e.g. – buildings) – Composite prefabricated panel including adjunctive means – Sandwich or hollow with sheet-like facing members
Reexamination Certificate
1999-02-18
2001-11-06
Friedman, Carl D. (Department: 3635)
Static structures (e.g., buildings)
Composite prefabricated panel including adjunctive means
Sandwich or hollow with sheet-like facing members
C052S784100, C052S794100, C052S309110, C052S656400, C052S656900
Reexamination Certificate
active
06311454
ABSTRACT:
This invention relates to a door construction and more particularly to a door having at its perimeter vertical and horizontal frame members, panels on opposite sides, and a core between the panels and spanning the space between the frame members, all of such parts being assembled and retained in assembled relation without requiring the use of any bolts, screws, or other fasteners.
BACKGROUND OF THE INVENTION
Interior and exterior doors conventionally are formed by assembling a plurality of frame members and other components which are joined and maintained assembled by various kinds of fastening devices such as bolts, screws, nails, and the like. The necessity of having to use fastening devices separate from the door components themselves is objectionable for a number of reasons. For example, an inventory of and storage facilities for such fasteners must be maintained. Fasteners needed from time to time must be removed from storage and applied manually to a door under construction. The manual application of such fastening devices inevitably results in imperfections due to differences in skills, experience, and other factors affecting the assemblers. Doors which are not uniform in manufacture cannot be uniform in use. Consequently, some doors fit better than others, have a better appearance, and provide greater trouble-free operation.
A principal object of the invention is to provide a door construction which overcomes the disadvantages referred to above.
SUMMARY OF THE INVENTION
A door constructed in accordance with the invention comprises a plurality of separate frame members which, when assembled, form a quadrangular frame of such size as to be accommodated in a doorway. Each frame member is channel-shaped and has a pair of spaced, parallel flanges joined at corresponding edges by a web. At the juncture between the web and each flange is a groove which extends the full length of the frame member. The ends of each frame member are mitered or shaped to form a substantially right-angular joint and the flange of each frame member has an extension at each end which projects beyond such flange.
The extensions are so arranged that, at each of the confronting ends of a pair of frame members, the extensions of the flanges of one of the frame members overlap the extensions on the flanges of the adjacent frame member. The overlapping flanges have cooperating dimples and projections which nest with one another and maintain the frame members assembled.
A core formed of insulating material spans the frame members and is accommodated in the channels of the frame members. The core is sandwiched between two external panels which preferably are adhesively secured to the core and to the confronting surfaces of the frame members. The marginal edge of each panel has a lip which is accommodated in the groove of each frame member and adhesively secured thereto.
If the door is one which should have a lock and/or latch mechanism associated therewith, a portion of the core may be cut away to accommodate a lock/latch mechanism support block and either or both of the panels may be provided with an opening to provide access to the lock/latch mechanism. The frame member associated with the lock/latch mechanism may be provided with an opening for accommodation of the lock and/or latch.
The panels may be flush or embossed and solid or provided with openings to accommodate one or more lights, in which case the core will be provided with a corresponding opening or openings.
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Friedman Carl D.
Globe Door, L.L.C.
Reising Ethington, Barnes, Kisselle, Learman & McCulloch, P.C.
Syres Christy M.
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