Metal door and method of production

Details Metal door and method of production Metal door and method of production

2000-05-25

2001-11-27

Safavi, Michael (Department: 3635)

Static structures (e.g., buildings)

Composite prefabricated panel including adjunctive means

Sandwich or hollow with sheet-like facing members

C052S656400, C052S792100, C029S897320

Reexamination Certificate

active

06321505

ABSTRACT:

This invention relates to a metal door. The invention also relates to a method of producing a metal door.
SUMMARY OF THE INVENTION
In one aspect of the present invention, this is accomplished by providing a door comprising: two metal panels; and a perimeter sub-frame, the sub-frame including a means for permitting weld gas to escape, the metal panels having their edges formed about the outside of the sub-frame.
An object of the invention is to provide a metal door having clean, flush edges capable of use in clean room applications for the electronic and pharmaceutical industries, as well as in general installations of other kinds.
According to the invention there is provided a door comprising two metal panels and an internal core structure, the panels having their edges formed around a perimeter sub-frame, wherein opposing edges of the panels are seam welded together to provide a flush finish.
Preferably the perimeter sub-frame is of a channel construction, the base of the channel being internally adjacent the respective edge of the door. It is also preferred that the base of the channel is apertured to act as a heat sink and to allow weld gases to escape. The apertures are preferably slots extending longitudinally of the base of the channel along its length. Preferably the door panels are of steel. In the preferred embodiment the door panels have a flush external surface.
The invention also provides a method of producing a metal door comprising constructing a perimeter sub-frame, assembling together the sub-frame, a core structure and two door panels, press forming the panels to the side edges of the sub-frame, and welding the adjacent door panel edges to provide a flush finish. Preferably the method includes welding the vertical seam at each corner of the door prior to welding the door panel edges longitudinally.
The foregoing and other aspects will become apparent from the following detailed description of the invention when considered in conjunction with the accompanying drawing figures.


REFERENCES:
patent: 1801080 (1931-04-01), Hart et al.
patent: 1873417 (1932-08-01), Jones
patent: 2297609 (1942-09-01), Clark et al.
patent: 2433767 (1947-12-01), Kuettel
patent: 2638187 (1953-05-01), Tate
patent: 2707535 (1955-05-01), Weimer
patent: 2787345 (1957-04-01), Soubier et al.
patent: 3359699 (1967-12-01), Jackson
patent: 3786613 (1974-01-01), Shepheard
patent: 3837134 (1974-09-01), DiFazio
patent: 3924377 (1975-12-01), Gill
patent: 4183393 (1980-01-01), Bailey
patent: 4344256 (1982-08-01), King
patent: 4441301 (1984-04-01), Benson
patent: 4583796 (1986-04-01), Nakajima et al.
patent: 4819383 (1989-04-01), McKann et al.
patent: 4896458 (1990-01-01), McKann et al.
patent: 4922674 (1990-05-01), Thorn
patent: 5448872 (1995-09-01), Thompson et al.
patent: 5490361 (1996-02-01), Gingras
patent: 5570560 (1996-11-01), Thompson et al.
patent: 5720142 (1998-02-01), Morrison
patent: 3127009 (1981-07-01), None
patent: 3706109 (1988-09-01), None
patent: 0543371 (1922-09-01), None
patent: 0773493 (1934-11-01), None
patent: 0825622 (1938-03-01), None
patent: 1064023 (1954-05-01), None
patent: 1358524 (1964-12-01), None
patent: 2497866 (1982-01-01), None
patent: 2564131 (1985-01-01), None
patent: 351888 (1931-07-01), None
patent: 471258 (1936-03-01), None
patent: 519438 (1938-09-01), None
patent: 519439 (1938-09-01), None
patent: 630237 (1947-10-01), None
patent: 838891 (1958-02-01), None
patent: 1152943 (1966-08-01), None
patent: 1309789 (1989-12-01), None
patent: 4083081 (1992-03-01), None
patent: 5332070 (1993-12-01), None
patent: WO 8604108 (1986-07-01), None
patent: WO 8803983 (1988-06-01), None

Affiliated with

Also associated with

Rating

Metal door and method of production does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Metal door and method of production, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metal door and method of production will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2572601