Movable or removable closures – With means mounting closure for swinging – Hinge leaf mounted on closure edge surface
Patent
1989-05-03
1990-07-03
Kannan, Philip C.
Movable or removable closures
With means mounting closure for swinging
Hinge leaf mounted on closure edge surface
49367, 49501, 52805, E05D 700
Patent
active
049379780
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to metal door structures of the kind in which the door leaf comprises two metal panels which extend in mutually parallel spaced relationship and which perferably incorporate therebetween an intermediate filling of insulating material; and which form the planar sides of the door leaf and each of which metal panels presents folded side-edge portions which in the vicinity of a joint region in which the two panels are joined together extend parallel with and in contact with one another, wherewith one panel presents on one side of the joint region a double fold which forms a pocker in which part of the other pane is received.
BACKGROUND PRIOR ART
Such metal doors are known to the art and are primarily intended for use as fire doors. Thus, there is described in FI, C, 49 457 a fire door in which two mutually opposing planar panels are provided with resilient coupling members which extend along respective panels and which are intended to be snapped into one another, by displacing the one panel relative to the other. A similar snap-coupling arrangement is described in AT,B, 381 767.
SE,A, 8103482-9 describes a similar arrangement, in which the coupling members are formed by folding the outer ends of respective panels of the door leaf.
These known fire doors are made of steel and are relatively complicated in manufacture, particularly when desiring to vary the thickness of such doors. The aesthetic appearance of such doors is also impaired by at least one of the joints located along the side edges of the door, and hence doors of this known construction cannot be used in rooms where the door shall have a fully aesthetic appearance.
It is also impossible to use such door constructions readily in conjunction with double doors, in which the door leaf of one of the doors carries a mullion which cooperates with the other door leaf of the other door.
Further examples of doors constructed in accordance with prior art techniques are described in SE,C, 167 656, DE,C1 3 423 550 and FR,A 2,2 400 608.
One object of the present invention is to provide a metal door construction which avoids the aforesaid drawbacks and other drawbacks encountered with known metal doors and fire doors, while simplifying the manufacture of such doors and enhancing the flexibility thereof, and which will satisfy all requirements with regard to aesthetic appearance.
SUMMARY OF THE INVENTION
These and other objects are fulfilled by the invention door construction which is of the aforesaid kind and which is mainly characterized in that said pocket is intended to receive a straight end-edge part of the other sheet metal panel which extends out of the pocket and along said joint region.
With doors constructed in accordance with the invention the panel edges are hidden, thereby rendering the door leaf more aesthetic. Shaped metal plate and steel plate which is surface treated, e.g. hot-galvanized steel plate, or steel plate coated with polyvinyl chloride can be used without risk of corrosion or mechanical damage, e.g. as a result of the occurrence of sharp edges when shearing the steel plate. Furthermore, it can be ensured readily that no cold bridges will be incorporated between the metal panels during the process of manufacture.
The panel which is provided with the double fold forms a basic profile which can be used for all occurrent types of door and which is independent of whether the door is a right-hung or a left-hung door. It is also simple to vary the thickness of the door, by varying the width of that part of the second panel which is received in the pocket. By making only minor modifications, the door can be used both as a square edge door and as a rebated door.
In practice it is preferred that the other or second panel is provided on the other side of the joint region with a folded profile in the form of a bead, such that the side edge of the door is provided with a channel or a groove between the double fold and the bead. This channel can be used to hold a decoration strip, preferably
REFERENCES:
patent: 445262 (1891-01-01), Kinnear
patent: 1848715 (1932-03-01), Hart et al.
patent: 2912725 (1959-11-01), Ries
patent: 3386209 (1968-06-01), Starcevic
patent: 3750333 (1973-08-01), Vance
patent: 4087942 (1978-05-01), Herrmann
patent: 4397116 (1983-08-01), Habicht et al.
patent: 4429493 (1984-02-01), St. Aubin
Johansson Arne
Johansson Inga-Lisa
Daloc AB
Kannan Philip C.
LandOfFree
Joining of side-plates at a metal door does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Joining of side-plates at a metal door, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Joining of side-plates at a metal door will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1882153