AU712332B2 - Reveal for window or door assembly - Google Patents

Description

AUSTRALIA

Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT *0@eS.

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Applicant(s): DOWELL AUSTRALIA LIMITED A.C.N. 004 437 898 Invention Title: REVEAL FOR WINDOW OR DOOR ASSEMBLY

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The following statement is a full description of this invention, including the best method of performing it known to me/us: 2 REVEAL FOR WINDOW OR DOOR ASSEMBLY FIELD OF THE INVENTION This invention relates to a reveal for a window frame or door frame assembly and relates particularly, but not exclusively, to such for aluminium extruded window frames or door frame assemblies.

DESCRIPTION OF PRIOR ART Hitherto, we have described in our earlier filed Australian patent application no. 75857/94 a reveal for a window frame or door frame assembly. The reveal is preferably of extruded aluminium or similar extruded material in order to replace the usual wooden reveals which are used around aluminium framed windows. It has been proposed to use an extruded material as the cost of quality woods for the timber reveal has become quite expensive. It has now been realised that in some situations, the use of a wooden reveal is required to be seen. It has also been realised in other situations that the reveal face may comprise other materials than wood.

OBJECT STATEMENT OF THE INVENTION ooo Therefore, the present invention attempts to solve this problem.

According to a first broad aspect of the present invention there may be provided an extruded window frame or S. door frame assembly having an internal reveal, said assembly having an extruded frame to carry said window or door, and a reveal frame, said reveal frame comprising at least two extruded reveal frame parts connected to said extruded frame, one reveal frame part connected with one side or top of said extruded frame and the other reveal frame part connected with an opposite substantially H:\MCooper\Keep\Spei\PN9752.MARK UP.doc 31/08/99 3 parallel extending side or bottom of said extruded frame, the connection being by a flange of said reveal frame part located by a flange of said extruded frame sides or top or bottom, to inhibit against removal of said reveal frame from said extruded frame in a direction transverse to the plane of the window or door to be carried by said frame, and characterised by said reveal frame having an exposed reveal face which extends generally perpendicularly to the plane of the window or door to be carried by said extruded frame and which has an offset leg which extends from adjacent a free edge of said reveal face, said leg being formed with surfaces for permitting fastening to building surfaces around an opening in which said window frame or door frame assembly is to be located, the depth of the offset being sufficient to accommodate part of an infill reveal which has an exposed reveal face, such that, in use, an infill reveal can be added to said window frame or door frame assembly such that the exposed reveal face of said infill reveal extends the width of the exposed reveal face of the reveal frame from said free edge towards an inner wall surface of said building.

Most preferably said window frame or door frame assembly has said infill reveal fitted thereto.

It is also preferred that said infill be sized in width to extend from said free edge up to an inner wall eo: surface of said building.

It is particularly preferred that said infill reveal face be substantially coplanar with the reveal face *of said reveal frame.

9* H:\MCooper\Keep\Speci\PN97S2 .MARK UP.doc 31/08/99 4 It is also particularly preferred that said offset leg define a channel behind said reveal face of said reveal frame and in which said reveal infill can be located.

It is particularly preferred that side walls of said channel be defined by a rear surface of the exposed reveal face of said reveal frame and by a part of said leg.

A reveal frame part for use in a window frame or door frame assembly forms part of the broad inventive oooeo concept as well.

oe ~BRIEF DESCRIPTION OF DRAWINGS In order that the invention can be more clearly ascertained examples of preferred embodiments will now be described with reference to the accompanying drawings wherein: Figure 13 is a transverse cross-sectional view of one side of a window frame fitted in a window opening of a building; Figure 14 is a view similar to that of Figure 13 showing a further example; Figure 15 is a view similar to that of Figure 13 showing a further example; and Figure 16 is a view similar to that of Figure 13 showing a still further example.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS As previously noted, we have filed Australian patent application no. 75857/94 directed to the concept of a reveal for a window frame or a door frame assembly.

The specification from that application is reproduced below.

\\MELBO1\home$\Gale\Keep\speci\PN9752.Dowe11.doc 28/04/97 5 REVEAL FOR WINDOW OR DOOR ASSEMBLY Field of the Invention This invention relates to a reveal for a window or door assembly and relates particularly, but not exclusively, to such for aluminium extruded window or door assemblies.

Description of Prior Art Hitherto, it has been common to provide an extruded window or door frame and to attach a wooden reveal to ooo the window or door frame so that it extends inwardly of the building to which it is attached. Recently, quality woods for finishing surfaces have become quite expensive. It is considered that it is now cost 15 effective to produce the reveal from extruded section and particularly, although not exclusively, from a extruded aluminium.

:i Object and Statement of Invention The present invention is directed towards a reveal of that nature and attempts to overcome the cost problem

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*associated with the use of a total wooden reveal for e a.

such windows or doors.

According to a first broad aspect of the present invention there may be provided an extruded window frame or door assembly having an internal reveal, said assembly comprising an extruded frame to carry said window or door, and a reveal frame, said reveal frame comprising at least two extruded reveal frame parts interconnected thereto, one reveal frame part interconnected with one side or top of said extruded frame and the other reveal part connected with an \\MELB01\home\Gaie\Keep\speci\PN9752.Do.eli .doc 28/04/97 6 opposite substantially parallel extending side or bottom of said extruded frame, the interconnection being by a flange of said reveal frame part located behind a flange of said extruded frame sides or top or bottom, to inhibit against removal of said reveal frame from said extruded frame in a direction transverse to the plane of the window or door to be carried by said frame.

Most preferably there are two interconnecting reveal frame parts extending between adjacent ends of said two reveal frame parts and connected therewith.

S•It is further preferred that all four reveal frame *parts are of the same transverse cross-section and that c said two interconnecting reveal parts also have a flange thereof located behind a flange of said extruded frame sides or top or bottom.

In accordance with a further aspect of the present invention there may be provided an extruded reveal part :i for an extruded window or door frame, said reveal part having a surface which will be exposed as the reveal face and an edge surface for butting with the extruded window or door frame, said reveal having a flange extending from behind the reveal face and past the edge surface, to permit location of said flange behind a flange of said extruded frame to inhibit against removal from said door or window frame in a direction transverse to the plane of a window or door to be carried by said frame.

Most preferably, said extruded reveal part has surfaces at the rear of said reveal face which can be used to effect mounting of said reveal and said frame to a building.

\\MELBOI\home$\Gaie\Keep\speci\PN9752.Dowel.doc 28/04/97 7 It is particularly preferred that said surfaces comprise two opposed faces which can be engaged by a mounting bracket.

It is further particularly preferred that the rear of the reveal be provided with either screw flute channels or flange surfaces which will permit two such reveals, which are brought together in butting, mutually perpendicular alignment, to be interconnected with screws or stakes carried behind said reveal face.

In another embodiment, the mounting can be effected by having the reveal face provided with a recessed o. channel, and fastening means can be passed into said •channel and through said reveal part and an infill cover S.0 can then subsequently be fitted into the channel to V 15 cover the fastening means.

Brief Description of Drawings In order that the invention can be more clearly ascertained reference will now be made to the •go0 accompanying drawings wherein: Figure 1 is an isometric view of a lower bottom corner of an assembly looking from the inside of a building outwards, without any internal architrave fitted to the assembly; Figure 1A is a view similar to Figure 1 but showing an architrave fitted to the assembly and plasterboard or other covering in place.

Figure 2 is a rear isometric view of part of the assembly showing interconnection of a mounting bracket; Figure 3 is a transverse cross-sectional view of a reveal part; \\MELB01\home$\Gale\Keep\speci\PN9752.Doweil.doc 28/04/97 8 Figure 4 is an isometric view of a mounting bracket; Figure 5 is a plan view of the mounting bracket shown in Figure 4; Figure 6 is a side view of the mounting bracket shown in Figures 4 and Figure 7 is close-up transverse cross-sectional view of the assembly at the sill level; Figure 8 is a transverse horizontal section of the assembly taken across a vertically extending part in the jamb; Figure 9 is a vertical transverse cross-sectional view taken at the head level; S.i: Figure 10 is a side view showing how fastening 15 screws may be used to interconnect the reveal parts; Figure 11 is a side view showing how a corner stake may be used to interconnect the reveal parts; and Figure 12 is a transverse cross-sectional view of a reveal part which has a channel therein through which fastening means can be passed to mount the reveal to a building.

Detailed Description of Preferred Embodiment The present invention is applicable to window or door frame assemblies and the description which follows will be in relation to a window assembly. It should be appreciated that the concepts expounded apply also to doors.

Referring now to Figures 1 and 1A there is shown an extruded window frame 1. The window frame 1 may have a further frame carried thereby which supports a pane of glass. Alternatively, a pane of glass may be suitably \\MELBO1\home$\Gale\Keep\speci\PN9752.Dowell.doc 28/04/97 9 glazed into the window frame 1. The window frame 1 is held relative to a window opening 3 provided in the external covering of the building. In this example, the external covering is of bricks and mortar 5. The building has an internal stud frame wall and one such stud 7 is shown. The stud 7 is aligned relative to the window opening 3. A noggin 9 extends between a pair of studs 7 on each side of the window opening 3 at the sill level. A similar noggin 9 may extend between the studs 7 at the head level.

S° The window frame 1 can be of known configuration .and of known extrusions.

A reveal frame 11 is provided on the internal part .of the assembly. Thus, the reveal frame 11 can be 15 referred to as an internal reveal. The reveal frame 11 is fabricated from an extrusion which may, typically, be of suitable metal such as aluminium or it may comprise a suitable plastics material. Typically, an aluminium extrusion is preferred.

20 Figure 1A shows plaster board 13 attached to the studs 7 and noggin 9 and an architrave 15, such as of wood, attached to the inside edge of the reveal relative to the building.

Referring now to Figure 2 which is a rear isometric view of part of the assembly comprising the window frame 1 and the reveal frame 11, it can be seen how the reveal frame 11 is interconnected with the window frame 1. The reveal frame 11 is formed from a reveal part 17 which has a reveal face 19 which is intended to be the exposed face of the reveal in the assembly. It also has an edge surface 21 for butting with an internal face 23 of the \\MEL2O1\home$\Ge\Keep\speci\PN9752.Dowel.doc 28/04/97 10 window frame 1. The reveal 11 also has a flange extending from behind the reveal face 19 past the edge surface 21, to permit location of the flange 25 behind a flange 27 of the window frame 1. As clearly shown in Figure 3, the edge surface 21 may have a protruding rib 29 so that the forward end of the rib 29 engages with the face 23 of the window frame. Figure 3 also clearly shows that the flange 25 of the reveal is generally transversely extending relative to the reveal face 19 and is formed on a leg 31 which extends from the edge surface 21. Preferably, the flange 25 of the reveal is S hook-shaped as shown, although this is not absolutely essential. Thus, the hook is formed by a rib 33 extending mutually perpendicular to the flange Thus, in use the flange 25 locates behind flange 27 of the window frame 1 and inhibits against removal of the reveal frame 11 in a direction transverse to the plane of a window carried by the window frame 1.

The flange 27 of the window frame 1 may be provided 20 with an upstanding rib 35 so that the upstanding rib

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can locate within the hook-shaped configuration of the *5 flange 25 and rib 33. Thus, this will inhibit against considerable lateral in and out movement of the reveal frame 11 relative to the window frame 1 in a direction horizontally across the window opening.

In the embodiments shown in Figure 1, the reveal frame 11 is formed by identical section extrusions. The vertically extending extrusions are cut to a length to overlap the ends of the horizontally extending extrusions as shown by Figures 1 and IA. Thus, in the embodiments shown in Figures 1 and 1A, and Figure 2, the \\MELBO1\homme$\Gae\Keep\speci\PN9752.Dowe1.doc 28/04/97 11 reveal frame 11 is formed from four reveal parts. Thus, there are two reveal parts extending along the upright sides of the window frame 1 and two further reveal parts extending along the top and bottom parts of the window frame i. Accordingly, it can be said that two such reveal frame parts the vertically extending parts are connected so that one of those parts is connected with a side of the window frame 1 and the other of the two reveal frame parts is connected with an opposite substantially parallel extending side of the window frame 1. Similarly, the horizontally extending reveal 0. frame parts are connected so that one is an interconnected with a top of the extruded frame of the window frame 1 and the other is connected with the bottom of the extruded frame of the window frame 1 at the sill level again an opposite substantially

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parallel extending part of the window frames.

The reveal frame parts are provided with surfaces 37 at the rear of the reveal face 19 which can be used to effect mounting of the reveal part to the building.

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Figures 2 and 3 clearly show that the surfaces 37 S present two opposed faces which can be engaged by a mounting bracket 39. The mounting bracket 39 is formed from a sheet of strip metal such as galvanised sheet steel and provided with a body part 41 and a mounting leg 43. Typically the mounting bracket 39 is pre-formed to the shape shown in Figures 4, 5 and 6 with the mounting leg 43 being perpendicular to the body part 41.

The body part 41 is provided with a pair of lugs pressed from the sheet material of the body part 41.

The lugs are displaced from the body part 41 by a \\MELBOI\home$\Gale\Oeep\speci\PN9752.Dowell.doc 28/04/97 12 distance approximately equal to the thickness of flanges 47 on which the surfaces 37 are provided. The inside edges are spaced slightly less than the spacing of the surfaces 37. The lugs 45 may be split as shown and bent downwardly as indicated. In use, the mounting bracket 39 can be located so that the lugs 45 engage over the flanges 47 and effect twisting locking engagement with the surfaces 37 thereon. The split arrangement of the lugs 45 will permit biting engagement of the lugs 10 into the metal of the flanges 47 when the mounting o o o_ :bracket 39 is twisted to engage over the flanges 47. In this arrangement, the mounting bracket 39 will be o o€o disposed transversely across the length of the reveal S0.

part. This is shown clearly in Figure 2.

Figure 4 shows that a further mounting leg 43' may be provided on the body 41. This may be preformed so 0. o that it extends parallel with the mounting leg 43 or it may be left so that it extends parallel with the body 41

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o and bent by the installer as required. Figure 4 shows 20 how it can be bent and swung to the required position.

0° The distance between the mounting legs 43 and 43' will be arranged to correspond with the width of the stud 7 or the noggin 9. A nail or like fastening means can be passed through the mounting legs 43 or 43' through a preformed opening 49.

By use of the mounting bracket 39 as shown, the reveal frame 11 can be fastened relative to the building so that the window frame 1 is correctly disposed relative to the window opening 3. In the assembled relationship of the reveal frame 11, the window frame 1 is carried by the reveal 11 and sits in a required \\MELBO\home$\Gale\Keep\speci\PN9752.Dowell.doc 28/04/97 13 position in the window opening 3. Thus, the window frame 1 is not directly connected to the building or to the outer covering of the building such as the bricks and mortar 5. Suitable silicon or other sealing material may be used to effect a weather-tight seal if required.

The reveal frame 11 is held integral to itself by the use of screw flute channels 51 on the rear of the face 19. Thus, when the reveal parts are cut to length and then brought together in butting, mutually perpendicular alignment, they can be interconnected with screws passing through the face 19 of one of the reveal parts such as the vertically extending part and into the screw flutes 51 of the other part. The arrangement is such that the screws are carried behind the reveal face 19 and therefore cannot be seen following complete *e.

installation of the assembly to a building.

The rear of the reveal face 19 is provided with a oooo channel 53 at the side opposite to that of the flange oooo 25. The channel 53 is formed with opposed parallel

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sides 55 and 57. The channel 53 is provided to receive an insert 59 which may be of wood or of a high density polyethylene or other suitable material. The insert may be of a short length or it may extend the whole length of the reveal parts. The insert is typically provided with a corrugated surface which can matingly engage with a corresponding corrugated surface on the internal faces of the channel sides 55 and 57 so that it is a force-fit therein. The insert 59 is provided so that nails or other fastening means can penetrate the insert 59 so that the architrave 15 can be fixed thereto.

\\MELBOI\home$\Gale\Keep\speci\ PN9752.Dowell.doc 28/04/97 M -0 M I 14 Figures 7 through 9 show various transverse crosssectional views of the assembly shown in Figure IA.

These figures also show that a screw-tensioning device 61 is screwed through the flange 25 of the reveal part and wedged against an outer face of the window frame i.

The insertion of the screw tensioning means 61 in this way tends to spread the reveal part 17 relative to the window frame 1 and thus force the two sections into locking engagement. It also can inhibit against the rattling of the window frame 1 relative to the reveal frame. Thus, the screw tensioning device 61 can be inserted at desired locations around the assembly.

•co• It should be observed from all of the previous e figures and, in particular, Figure 3 that the flanges 47 .0 are generally parallel and aligned co-planer. It is also observed that the outermost face of the flanges 47 S.on the outermost periphery of the reveal frame 11 only protrudes marginally outwardly past the edge face 63 eeeo (see Figure 8) of the window frame i. Thus, whilst the window frame 1 is provided with a mounting flange *which extends outwardly past the outer face of the S"flanges 47, the mounting flange 65 is provided with a score line 67 to enable the outer portion of the mounting flange 65 to be removed by breaking therefrom.

Thus, in this arrangement, when the outer portion of the mounting flange 65 is removed, the outermost width and height of the assembly comprising the window frame 1 and the reveal frame 11 corresponds substantially or marginally less to the window opening 3 or the space between opposed studs 7 or noggins 9. Thus, the assembly is suitable for retro-fitting into existing \\MELBOI\home$\Gale\Keep\peci\PN9752.Dowel1.doc 28/04/97 15 buildings by removal of the outer portion of the flange It should be appreciated that in the embodiment previously disclosed, that the horizontally extending reveal frame parts 17 may be cut slightly longer than is necessary to effect tight engagement of the interconnecting flanges of the upright reveal part 17 with the corresponding flanges of the upright frame parts of the window frame 1. Thus, slight adjustment can be effected in the positioning of the reveal frame 11 relative to the window frame 1 by moving the whole reveal frame 11 left or right as may be needed.

ee •e Similarly, the horizontally extending reveal part 17 may be fitted with a similar lengthened arrangement so that up and down displacement may be effected. In this way, adjustment on site can be made to cope for slightly misplaced studs 7 or noggins 9. The screw tensioning devices 61 may be arranged to effect the necessary eeo• transverse side to side or vertical up and down displacement as needed. Thus, appropriate insertion of *°the screw tensioning devices 61 can move the reveal ee frame 11 to some minor degree relative to the window frame i.

Figure 10 shows the screw interconnected arrangement of the reveal part 17 at one corner.

Figure 11 shows a different arrangement of interconnection where a corner stake 69 can be force fitted into appropriate channels in the reveal part 17.

In this arrangement, a mitre cut can be provided at the butting ends of the reveal part 17.

\\MELBOI\home$\Gale\Keop\speci\PN9752.Dowe11.doc 28/04/9' 16 Figure 12 shows a transverse cross-sectional view of a different arrangement of the reveal part 17 whereby mounting of the reveal frame 11 can be by way of screws or like fasteners. Here a channel 71 can be formed in the face 19 of the reveal part 17. The head of the screw 73 can be below the face 19 when the screw 73 is driven home. An infill cover 75 can be force fitted into the channel 71 to cover the head of the screw 73.

The cover 75 may be arranged to snap-lock into the channel 71 if desired. Typically the cover 75 is of the same material as the reveal part 17 although it may be S.of some other material to provide a contrasting decorative appearance if required.

o o° *oo In the embodiments described it can be seen that the cut of the reveal parts 17 is effected by a straight cut and that check-out cuts and the like are not needed to effect a neat engagement of the abutting frame part 17.

oo The whole assembly can be uniformly painted or eeoc coated such as by powder coating to give a durable surface to the assembly.

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Modifications may be made to the invention as would be apparent to persons skilled in the aluminium and/or window or door arts. For example, the window frame 1 may be fitted with an architrave in accordance with the disclosure in our Australian Patent Specification No 590479. A similar internal architrave 15 may be provided in accordance with the disclosures in that aforementioned Australian patent specification.

In another modification only two reveal parts with the flanges 25 for connecting behind flanges 23 of the \\MELBOI\home$\Gale\Keep\speci\PN9752 .Dowell.doc 28/04/97 17 window frame 1 may be used. In this case they may be fitted to the two vertically extending jamb parts of the window frame 1 or to the two top and bottom horizontally extending parts of the window frame 1. These two reveal parts can then be interconnected with interconnecting parts at their ends to hold them in the required spaced apart position. For example, if the two vertically extending reveal parts 17 are fitted to the window frame 1, the horizontal extending parts may be wood or other material parts, and these may be intended to be visible or non-visible in the final assembly when fitted in a building. These horizontally extending parts may not have flanges thereon corresponding to flanges 25 and 6 thus may be used merely to hold the vertically extending reveal parts in position.

These and other modifications may be made without departing from the ambit of the invention, the nature of which is to be determined from the foregoing description.

BD

e \\MELBOI\home$\Gale\Keep\speci\PN9752.Dowe11.doc 28/04/97 18 THE CLAIMS FROM THAT SPECIFICATION HAVE NOT BEEN

INCLUDED

Referring now to Figure 13 there is shown one example of the present invention. Like components to those referred to in the specification of our prior Australian patent application 75857/94 will be provided with the same numerical designations. Thus, a window frame or door frame 1 of known cross-section has a reveal frame 11 hook fastened thereto. The window frame 1 has a face 23 with a rib 35 at its free end. The reveal frame 11 has an edge surface 21 with a leg 31 and e.

coo0 a flange 25 with a rib 33. The arrangement is such that oooo o the reveal frame 11 can be hooked relative to the window frame 1. A rib 29 on the reveal frame 11 stops angular rotation in a clockwise direction shown in Figure 13 and aligns the reveal face 101 generally transversely of the plane of any window or door carried by the door frame 1.

o The window frame 1 is butted up to the outer covering of the building. Thus, the reveal face 101 extends inwardly from the window frame or door frame 1 through an opening in which the assembly is fitted. The reveal frame 11 has an offset leg 103 which has a first flange part 105 and a second flange part 107. The offset leg 103 extends from adjacent a free edge 109 of the reveal face 101. The second flange part 107 extends generally parallel with the reveal face 101 whilst the first part 103 extends generally perpendicularly to the reveal face 101. The first part 107 therefore provides surfaces which permit fastening of the reveal frame 11 to building surfaces around the opening in which the window \\MELBO1\home$\Gale\Keep\pei\PN9152.Dowell.doc 28/04/97 19 frame or door frame is located. In this case, the reveal frame 11 is fastened to a stud 7 by means of a nail or screw ill. Packing 113 may be provided behind the second surface 107 and the face of the stud 7 to permit good fixing and to ensure that the reveal frame 11 remains cranked relative to the window frame 1 so that the rib 29 remains engaged against face 23 of the window frame 1.

It can be seen that the offset leg 103 defines a channel 115 behind the reveal face 101. Thus, it can be seen that the side walls of the channel comprise a rear surface 117 of the exposed face 101 of the reveal frame 11 and part of the offset leg 103. In this case, the part of the offset leg 103 which defines a side wall of the channel 105 comprises surfaces of the second flange part 107. The channel 105 therefore has a width which is equal to the depth of the offset of the leg 103. In other words, the depth is equal to the width of the first flange part 105. This depth is sufficient to accommodate part of an infill reveal 119 which, in this example, comprises a wooden infill reveal 119. The depth of the wooden infill reveal 119 is equal to the width of the channel 105 (the depth of the offset of the leg 103) and has a width which extends the width of the exposed reveal face 101 from the free edge 109 towards an inner wall surface of the building 109. In this case, the width corresponds to that necessary so that the side edge of the infill 119 aligns with the surface of the wall board or panelboard 13 of the building. An architrave moulding 121 can be fitted around the opening \\MELBO1\home$\Gale\Keep\speci\PN9752.Dowel11doc 28/04/97 20 in which the assembly is fitted to give the usual finished appearance.

It should be appreciated that the window frame or door frame assembly is provided as a unitary structure comprising upright jambs, a head section and a sill section, each comprised of respective components comprising the window frame 1 and the reveal frame 11.

Thus, the assembly can be fitted in the window or door frame opening in the building and adjusted to the correct position and nails or screws passed through the :leg 105 to fasten the assembly to the building. The infill 119 and architrave 121 can then be added to finish the installation. It should be noted that the infill reveal face 123 is substantially co-planar with the reveal face 101.

The installation therefore provides an aesthetic appearance as it comprises a window or door frame 1 with an exposed reveal face 101 and with a further reveal infill 119. The appearance if a wooden infill 119 is used is generally aesthetic and compatible with known building techniques and therefore represents an advance.

In addition, a smaller width wooden infill 119 is used than a reveal completely of wood and this results in a cost advantage.

Figure 13 also shows an alternative architrave arrangement. Here, the reveal infill 119 has a protruding tongue 125 which can engage with a groove 127 on a rear of the architrave 121. In this way, positional location of the architrave 121 relative to the infill reveal 119 can be predetermined and can be supplied in pre-joined lengths prior to the mitre \\MELB1\home$\Gale\Keep\speci\PN9752.Dowell.doc 28/04/97 21 cutting of the corners. In addition, if desired, it may be pre-cut with mitre joints to the required lengths for easy fitting without cutting on-site. In addition, the use of the tongue and groove provides for enhanced connection.

Referring now to the embodiment shown in Figure 14 it should be noted that it is generally identical to that in Figure 13 except that the reveal frame 11 is provided with a flange extension 129 from leg 31.

Flange extension 129 acts to provide a flashing surface which is otherwise provided by flange 131 of the window or door frame 1. Thus, the window frame or door frame 1 may be produced without the flashing flange 131 and instead, it can be provided by the flange extension 129 .e on the reveal frame 11. Figure 14 clearly shows that the width of the flange extension 129 is less than the width of the flashing flange 131. Thus, less extruded material such as aluminium is used and this o represents a cost saving. In addition, in the example ooo• shown, greater flashing depth is provided to the installation as the free end of flange extension 129 is inwardly of the window or door frame opening relative to the free end of the flashing flange 131.

Referring now to the embodiment shown in Figure it should be noted that it is substantially identical to that in Figure 13 except that the width of the exposed reveal face 101 is narrower. This, in turn, means that the width of the reveal infill face 123 is greater.

Referring now to the example shown in Figure 16 the reveal 11 is functionally the same as that shown in Figure 13 except that the reveal face 101 is \\MELBOI\home$\Gale\Keep\speci\N9752.Doweli.doc 28/04/97 22 substantially narrower in width. The reveal infill in this case comprises plasterboard or panelboard 133. The reveal 11 has a channel 105 of a width generally equal to the thickness of the panelboard or plasterboard 133.

The offset leg 103 is therefore comprised of the same first flange part 105 and second flange part 107 but also by the edge surface 21 and by a third flange part 135. Thus, in this case, the offset leg 103 is a stepped offset leg. In this case, a continuous packing 137 can be attached to the stud 7 to pack-out the stud 7 so that the panelboard or plasterboard 133 extends generally transversely to the plane of any window or door in the assembly. The corner of the internal wall 13 and the infill reveal 119 can be provided with a known angled corner bead 139 and finished with a setting plaster 141.

The arrangement provides for a neat finish to the assembly. The infill reveal 119 has its exposed face generally co-planar with the exposed face 101 of the reveal frame 11.

Modifications may be made to the invention as would be apparent to persons skilled in the aluminium window or door frame extrusion arts and/or the building arts generally.

These and other modifications may be made without departing from the ambit of the invention, the nature of which is to be determined from the foregoing description.

\\MELBO1\home$\Gale\1eep\speci\PN9752.Do11.dc 28/04/97

Claims (6)

1. 2. An extruded window frame or door frame assembly as claimed in claim 1 wherein said window frame or door frame assembly has said infill reveal fitted thereto.
2. 3. An extruded window frame or door frame assembly H:\MCooper\Keep\Speci\PN9752.MARK UP.doc 31/08/99 24 as claimed in claim 1 or claim 2 wherein said infill is sized in width so it extends from said free edge up to an inner wall surface of said building.
3. 4. An extruded window frame or door frame assembly as claimed in any one of the preceding claims wherein said infill reveal face extends substantially coplanar with the reveal face of said reveal frame when fitted thereto.
4. 5. An extruded window frame or door frame assembly as claimed in any one of the preceding claims wherein said offset leg defines a channel behind said reveal face of said reveal frame and wherein said reveal infill is located therein.
5. 6. An extruded window frame or door frame assembly as claimed in claim 5 wherein side walls of said channel are defined by a rear surface of the exposed reveal face of said reveal frame and by a part of said leg.
6. 7. An extruded window frame or door frame assembly substantially as herein described with reference to any one of the examples in the accompanying drawings. S. 25 Dated this 31st day of August 1999 DOWELL AUSTRALIA LIMITED By their Patent Attorneys GRIFFITH HACK Fellows Institute of Patent 30 Attorneys of Australia e *999 9* H:\MCooper\Keep\Speci\PN9752.MARK UP.doc 31/08/99