US 3170456 A
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Description (OCR text may contain errors)
1955 G. E. MOSS ETAL 3,17,45
OVEN DOUBLE PANE DOOR um'rs AND METHOD OF MAKING SAME 2 Sheets-Sheet 1 Filed Sept. 9, 1963 INVENTORS GORDON E. MOSS JAMES B. M055 Feb. 23, 1965 a. E. Moss ETAL 3,170,456
OVEN DOUBLE PANE DOOR UNITS AND METHOD OF MAKING SAME Filed Sept. 9, 1965 2 Sheets-Sheet 2 INVNTORS GORDON E. MOSS JAME S B. MOSS ATTORNEYS window construction for such doors.
United States Patent 3,170,456 OVEN DOUBLE PANE DOOR UNITS AND METHQD OF MAKING AIVE Gordon E. Moss, 330 Hugell Ave, and .lames B. Moss, 188 Yonge St., both of Midland, Ontario, Canada Filed Sept. 9, 1963, Ser. No. 308,299 1 Claim. (Cl. 126-200) This invention relates to oven double pane door units and method of making same.
Oven double pane door units have previously been produced which incorporate a frame structure and two parallel spaced apart panes carried thereby forming a These structures, as previously constructed, have been complicated usually embodying side frames, an intermediate frame functioning as a spacer unit, seals associated with the side frames and an enveloping peripheral flanged band adapted to secure all the parts together. These structures, by reason of their number of individual parts collectively secured to form the unit, are costly constructions and are subject to further cost of manufacture by reason of the ditiiculties encountered and the precision necessary for securing all the parts together to form the final unit. The present invention eliminates this complication and is of such simplified character that the cost, both in terms of material and assembly, is markedly reduced by comparison.
According to the invention, the preferred method followed consists generally in' providing a strip of metal having a pair of longitudinally spaced apart channels on one side thereof and corresponding ribbed projections on the other side, cutting a length of said strip bendable to form a rectangular frame of given size and with the free ends of said strip substantially abutting, removing a corresponding length of each of said ribs at four locations spaced apart longitudinally of said strip and coinciding with corner areas of said frame to be formed and thereby intersecting said channels and slotting said strip as to form frame, inserting two panes of transparent rigid material of an area substantially corresponding to that enclosable by said frame as to locate the edges of said panes in said channels and to cause the corners of said panes to project through said aligned slots in said frame at the corners and then locking said free ends of said frame in substantially butting relation. Preferably the strip is extruded aluminum and preferably also the strip is formed with at least one longitudinally extending groove which intersects each channel along its length for the reception of a sealing element adapted to abut and seal the panes in said frame.
The invention will be clearly understood by reference to the following detailed specification taken in conjunction with the accompanying drawings, wherein FIG. 1 is a fragmentary perspective illustration of an oven door incorporating a double pane unit constructed according to the present invention and which in particular illustrates a preferred form of locking means for the substantially abutting ends of the frame.
P16. 2 is a section partially exploded taken along the line 22 of FIG. 1.
FIG. 2A is a fragmentary section to illustrate an alternative form of grooving the strip to include a seal for the pane.
FIG. 3 is an enlarged fragmentary perspective illustration of the upper part of a double paned unit according to the invention showing the specific manner in'which the panes fit and are secured and also illustrating an alternative form of locking means to that shown in FIG. 1.
FIG. 4 is a section taken along the line 4-4 of FIG. 3.
FIG. 5 is a perspective illustration of a part broken away to illustrate the double paned oven door unit as an oven door.
FIG. 6 is a section taken along the line 6-6 of FIG. 5 which illustrates one manner in which the peripheral enclosing strip of'the unit is mounted; and
FIG. 7 is a fragmentary sectional detail illustrating an alternative manner of mounting the marginal enclosing strip.
Referring to the drawings, A indicates any conventional oven door and which is recessed as at 10 to receive a double pane window unit, and here shown with a double pane unit formed according to the present invention. This is comprised preferably by an extruded strip of aluminum'or other metal capable of extrusion and which is extruded preferably in the form illustrated, in section, in FIG. 2 as to form in particular a pair of marginal channels 11 on one side of the strip with corresponding rib-like projections 12 on the other side of the strip with an intervening web of material 13. The extrusion also includes the marginal side flanges 14. Accordingly, when a length of such strip is cut, sufficient to form a rectangular frame of given size, and such element is bent to form a rectangular frame B with the free ends thereof substantially abutting, the channels 11 are then adapted to receive the peripheral edges of transparent panes of rigid material whereby a one-piece frame is formed enclosing and securing within its periphery the two transparent panes. In this connection, the preferred method consists in removing a corresponding length of each of said ribs at four locations spaced apart longitudinally of said strip, coinciding with the corner areas of said frame to be formed, as indicated at 15 (FIG. 3), which removal thereby intersects said channels and forms a pair of transversely spaced apart slots therein at each corner as indicated at 16 and 17, each of said slots 16 and 17 being longitudinally aligned with a corresponding slot of said other corner areas. The strip will thus bend readily at these corner areas when it is subjected to bending forces to form the frame and the corners of the panes, whose edges are received in the longitudinally extending channels 11, will project through the corner slots 16 and 17 of the frame as clearly shown in FIG. 3. At this point it might be noted that the character of the frame is readily controlled by the length of the material which is removed from the ribbed structures at the corner areas. For instance, the length of the strip removed will control the radius of curvature of the corners as to produce a variable curve in direct proportion to the amount of the material removed. Consequently, if a frame is desired having a curve of substantial radius, then a substantial length of material will be removed at the corner and the converse will be the case where a curve of very small radius is desired. In fact, when a very slightamount of material is removed from the corners, the. frame can be formed such as to be substantially right-angular at the corners. In this way, therefore, it will be clear that a frame'of desired aesthetic appearance may be formed in terms of variation of radius of curvature of the corners where desired and when the free ends of the strip are secured in substantially abutting relation, the panes therein will be solidly secured as to form a rigid composite unit.
it is preferable to seal the panes in the frame B and according to the present invention, we achieve this by forming in the strip a longitudinally extending groove which is-coextensive with the channel and which intersects the channel. For instance, in FIG. 2 it will be noted that the groove 18 is formed in the strip at least on one side of each channel and which intersects each channel, so that the seal 19, such as a length of asbestos rope, neo- .to the form of locking illustrated in FIGS. 3 and 4.
3t prene, rubber or other suitable sealing element, may be readily carried in the groove and disposed in pressure contact with each pane, thus. to achieve desired sealing. Of course, a similar groove could be formed on the other side of the channel where a double sealing was desired while in the alternative, and as shown in FIG. 2A, the groove 18a may be formed along the outside of the channels ill as to provide a seal impinging against the peripheral edge of each pane. I
In order to lock the free ends of the frame together in substantially abutting relation, we prefer to recess the strip slightly inwardly of the free ends 20 thereof (FIG. 1) with a'recess which enlarges inwardly of its intersection with the free edge of each strip as for instance, the recesses 21 and 22 which, when the freeiends of the strip are located as shown in FIG. 1, forms ajoint recess substantially approximating a figure eight; Then by providing a locking piece 23 of the same shape and size and inserting it in the communicating orifices 21- and 22 the free are locked together. In this connection and as shown in FIG. 2, the locking piece 23 is died or stamped'as to I provide the offset peripheral flange 24 which is adapted to overlap the peripheral edges of the recesses 22 so as to hold the locking piece in the orifices flush with the web portion 13 of the strip. Then this piece may be finally retained in position by means of a small metal slide 25 offset to provide the side flanges 26, which flanges are adapted to be received in the horizontally extending grooves 27 formed in the extrusion inwardly of the channels 11 so that when slide 25 is moved over the area of the orifices, a completely enclosed locked unit is finall provided. Other means of securing could be employed and in this instance, as an alternative, attention is directed Referring to FIG. 4 in particular, a central channel 28 is formed in the upper surface of the web 13 of the strip as shown and a locking plate 29 is then slid into position by way of its sliding connection with the side grooves 27 so that the strip then overlies the butting free ends of the frame. Then by inserting the heads of studs in the central channel 28 and positioning them to pass through the notches3tl in the ends of the plate 29, securement is made by suitable Wing nuts or the like 311.
From this it will be seen that complications of the past in forming double paned door units are eliminated and replaced by a very simple unit embodying a one-piece frame and a locking means which will secure the panes in sealed engagement as a composite three-piece unit, as com pared to a six-piece unit common in the prior art.
The extrusion, as illustrated either in the case of FIG. 2 or FIG. 3, incorporates the outer side flanges M for the purpose of cooperating with the recess in the oven door as to provide for ready mounting in the door. However, it will be appreciated that this may be varied inaccordance with any requirements necessary for mounting purposes.
While it has been the general practice to employ units of this kind as windows for oven doors, the structure of thepresent invention in particular lends itself to the formation of a complete oven door in this manner since the simple one-piece frame and the manner in which the peripheral flanges 33 and Edwhich not only give strength characteristics to the strip; but form a means of joining outer frame 32 tothe double pane unit. As shown in FIG. 6, the side flanges of the inner frame 13 incorporate grooves into which theflanges 33 and 34 may be snapped in well known manner. frame B may be merely formed with anexternal ledge 36 and the outer edges of the flanges 33 and 3-4 are merely.
snapped into abutment therewith. The joining outer frame maybe secured in any suitable manner as, for instance, screws passing adjacent the free ends thereof to unite with the metal of the inner frame B. In this way,
. a very practical complete oven door is provided, the major faces of which are completely transparent.
While it is preferred toform the frame of the double paned oven door unit as per FIGS. lto 4 and'the outer and inner frames of the complete door unit shown in FIGS. 5 to 7 by extrusion, it will be apparent that the frames may be otherwise formed where-practical and,
tierefore, with these terms the frames may be formed from any desired metal practical for the purpose.
In the specification and the appended claim it will be understood that where the invention is-referred to as a double paned oven door unit, this applies either to a door windowunit or a complete door unit itself;
What we claim as our'invention is:
An oven double pane door unit comprising a strip of metal having parallel spaced apart longitudinally extendingchannels therein, said strip being bent in the form of a rectangular frame with the free ends of said strip substantially butting one another, the corners of said frame each having a pair of transversely spaced apart slots therein in registry with said channels, rectangular panes of transparent material of a size substantially corresponding to the size of said frame carried by said frame in parallel spaced apart arrangement and having their edges enclosed in said channels and the corners thereof project'- ing through and straddled by said slots, sealing means disposed between said frame and said panes for sealing said panes in said frame, means for locking the free substantially butting ends of said frame together to form a rigid unitary combination, and a continuous band of metal disposed around theperiphery of and secured on said frame to encase said frame and the projecting corners of said panes.
References Cited by the Examiner UNITED STATES PATENTS 5/43 Lotter i 126200 2/62. Mills 126-200 Alternatively, the innerv