GB2262300A

GB2262300A - Door meeting stile

Info

Publication number: GB2262300A
Application number: GB9121151A
Authority: GB
Inventors: Ernest Malcolm Heywood Scholes
Original assignee: Scholes Ernest M H
Current assignee: Scholes Ernest M H
Priority date: 1991-10-04
Filing date: 1991-10-04
Publication date: 1993-06-16
Anticipated expiration: 2011-10-04
Also published as: GB2262300B; GB9121151D0

Abstract

The invention provides a door meeting stile capable of being carried by a door leaf for use in a double door unit. The stile has an internal wall 99 at least part of which occupies a region of the stile which does not protrude beyond the outer surface 103 of a door leaf 93 by which it is carried. and the internal wall is such that if the stile is cut away in the plane of the outer surface of the door leaf, in the upper and/or lower region of the stile, at least part of the internal wall remains as a continuation of the outer surface of the leaf, so as to extend across at least part of the gap which would exist between the two door leaves of the double door unit when closed in use. Such a stile allows the more effective sealing of the door unit against draughts, etc. The invention also provides a door leaf carrying such a meeting stile, and a double door unit in which at least one of the two door leaves carries such a stile. <IMAGE>

Description

DOOR MEETING STILE Field of the Invention This invention relates to a door meeting stile, of the type carried by a door leaf in a double door unit and used to connect that leaf to another, relatively moveable leaf when the two are closed together in the door frame.

The invention also relates to a door leaf carrying such a door meeting stile, and to a double door unit including the door leaf.

Background to the Invention Double door units are known which comprise two door leaves hingedly set in a door frame so as to be capable of movement relative to one another between an open and a closed position. The two leaves meet, in their closed position, at a meeting stile which is usually carried by one of the leaves. The stile-carrying leaf is then referred to as the "slave" leaf, and is the first to close and the last to open of the two leaves. The other leaf is generally referred to as the "live" leaf.

The door meeting stile is usually secured to the inner vertical edge of the slave leaf (i.e. that edge nearest to the live leaf), and runs the entire height of the door leaf. It also usually protrudes beyond the plane of the door leaf, and thus needs to be cut away in its upper and lower regions so as to be able to clear the upper and lower parts of the door frame when the slave leaf is in its closed position against the frame.

A seal is usually mounted around the complete frame of a double door unit, so as to abut the door leaves around their peripheries when they are closed against the door frame. This seal serves to exclude draughts which might otherwise be allowed to pass through the door unit.

However, the inner edges of the two door leaves do not actually meet in the region of the meeting stile; the stile effectively bridges the gap which would otherwise exist between the two edges. Since the door stile is itself cut away at its upper and lower extremities so as to clear the door frame, there is thus a region in a typical double door unit (i.e. between the inner vertical edges of the two door leaves) where no part of either a door leaf or the meeting stile abuts the seal mounted on the door frame. Draughts can pass through this unsealed gap from one side of the door unit to the other.

Sealing the top and bottom of double door units in this particular region has always presented a problem, particularly for domestic applications where the consumer is reluctant to tolerate a draughty door. It is therefore an aim of the present invention to provide a double door unit in which the meeting stile region is effectively sealed, making use of components which are relatively simple and inexpensive to produce. The invention also aims to provide a meeting stile, of use in such a door unit, which assists in the effective sealing of the unit.

Statement of the Invention According to a first aspect of the present invention there is provided a door meeting stile capable of being carried by a door leaf for use in a double door unit, the stile having an internal wall at least part of which occupies a region of the stile which does not protrude beyond the outer surface of a door leaf by which it is carried, the internal wall of the stile being such that if the stile is cut away in the plane of the outer surface of the door leaf, in the upper and lower regions of the stile, at least part of the internal wall remains as a continuation of that outer surface, so as to extend across at least part of the gap which would exist between the two door leaves of the double door unit in use.

The structure and position of the internal wall of the meeting stile of the invention means that when a door leaf carrying the stile is closed against the outer frame of a double door unit, the internal wall abuts the door frame or any seal provided on the door frame, as does the outer surface of the door leaf itself. The internal wall thus need only form a continuation of the outer surface of the door leaf in those regions in which it is likely to contact the frame of a door unit in which it is used the the upper and lower extremities of the stile).

Even when the meeting stile is cut away at its upper and lower extremities so as to clear the outer frame of a door unit in which it is used, it still has an internal wall which will abut the door frame and provide an effective seal in the region of the meeting stile. This seal will extend at least part way across the gap between the inner vertical edges of the two door leaves of the unit, thus providing effective draught prevention.

The extent of the gap which is sealed will depend on the width of the internal wall of the meeting stile.

Preferably, the internal wall, when the meeting stile is cut away, extends as a continuation of the outer surface of the door leaf as far as is possible whilst still allowing clearance for the other leaf in the door unit to open and close when the stile-carrying leaf is closed against the frame of the unit. Since the clearance needed will typically only be of the order of a few millimetres (depending on the depth of the relevant door leaf), the seal between the door frame and the internal wall of the meeting stile can be continuous virtually right across the gap between the inner edges of the two door leaves, the remaining unsealed gap being almost negligible in width.

Any portion of the gap between the inner vertical edges of the two leaves of the door unit, across which the internal wall of the stile does not extend when the stile has been cut away in the plane of the outer surface of the door leaf, is preferably sealed with a small seal or draught excluder of a conventional type. For instance, a length of brush or wool pile may be attached to the door frame in the unsealed region, as used conventionally to seal a double door unit in the region of a door meeting stile. This seal would be positioned so as to bridge the vertical gap between the door frame and that part of the meeting stile which has not been cut away to clear the door frame. It is naturally preferable to keep the length of seal as short as possible, and hence also to make the internal wall of the meeting stile extend as far as possible across the gap between the two door leaves.

Where only a small clearance gap is left unbridged by the internal wall, this can be sealed using a very small piece of wool pile about the size of a paintbrush. Such a seal may be secured to the door frame, for instance using an adhesive, or by means of screws located in screw ports provided on the outer frame. The seal may alternatively be secured to the upper and/or lower edges of the meeting stile itself, in its cut away regions, rather than to the door frame into which it closes.

A door leaf by which the meeting stile is capable of being carried may be made of wood or any other suitable material from which door leaves are conventionally made.

The leaf may be glazed or double glazed, in which case, it will comprise a door sash, which may be made from extruded PVCu or aluminium, carrying one or more glazing panes made from glass or an alternative such as polycarbonate. The meeting stile itself may be made from any suitable material, preferably extruded PVCu or aluminium since in a stile manufactured by an extrusion process, it is a relatively simple matter to design the stile with inner walls in virtually any desired position.

In the case where the door leaf comprises a glazed PVCu or aluminium door sash, the meeting stile may be formed as an integral part of the door sash. The stile may alternatively be secured to the door leaf by means of screws or any other securing means.

In the case where the meeting stile is made of extruded PVCu, it may be reinforced by means of an internally located reinforcing member, for instance of steel. This should be located within the stile so as not to interfere with the cutting away of the stile at its upper and lower extremities in order to clear a door frame.

The meeting stile preferably additionally comprises a gasket or similar seal which, in use, is adapted to abut that door leaf of the door unit by which the stile is not carried, to thus seal the interface between the stile and the door leaf when both leaves of the door unit are in their closed positions. More than one such seal may be carried by the stile, according to requirements.

According to a second aspect of the present invention, there is provided a door leaf for use in a double door unit, carrying a door meeting stile in accordance with the first aspect of the invention.

According to a third aspect of the invention, there is provided a double door unit comprising two door leaves hingedly mounted in a door frame so as to be moveable relative to one another between a closed position and an open position, wherein the door leaves meet in their closed position at a door meeting stile in accordance with the first aspect of the invention, the stile being carried by one of the two door leaves.

The frame of the door unit may be made from wood, aluminium or PVCu. The door leaves may be made from wood, or may be glazed or double-glazed, in which latter case each will comprise a wooden, PVCu or aluminium door sash carrying one or more glazing panes. One or more seals may be mounted on the "live" door leaf, (i.e. that which does not carry the door meeting stile), to abut the stile when the live leaf is in its closed position and hence seal the interface between the live leaf and the stile.

The present invention will now be described by way of example only and with reference to the accompanying illustrative drawings, of which: - Figures 1A and 1B show parts of double door units comprising conventional door meeting stiles; - Figures 2A and 2B show parts of an alternative double door unit, also comprising a conventional meeting stile; Figure 3 is a schematic horizontal section taken through a double door unit in accordance with the invention; - Figure 4 is a schematic vertical section taken through the door unit of Figure 3; - Figure 4A is a schematic front view of the door unit of Figures 3 and 4; - Figure 5 is part of a horizontal section taken through a double door unit in accordance with the invention; - Figure 6 is part of a vertical section taken through the door unit of Figure 5;; - Figure 7 is part of a horizontal section through an alternative double door unit in accordance with the invention; - Figure 8 is part of a vertical section taken through the door unit of Figure 7; - Figure 9 is part of a horizontal section taken through yet another, preferred, door unit in accordance with the invention; and - Figure 10 is part of a vertical section taken through the door unit of Figure 9.

Detailed Description of the Drawings Referring firstly to Figures 1A and 1B, there is shown in both Figures part of a horizontal section taken through a double door unit which comprises a "slave" door leaf 1 and a "live" door leaf 3. Each door leaf is hingedly mounted to the outer frame 5 of the door unit, so as to be moveable between a closed (in which the leaf abuts the frame, as shown in the Figures) position and an open (in which the leaf is outside the frame) position.

The door meeting stile 7 is carried by the slave leaf 1, which is so called because it is the first of the two leaves to close and the last to open when both door leaves are operated together. The stile protrudes beyond the front surface 9 of the slave leaf. Thus, when the slave leaf is in its closed position and its front surface 9 abuts the upper and lower parts of the frame 5, meeting stile 7 effectively overlies the outer frame.

Thus, that part of the meeting stile which protrudes beyond surface 9 must be cut away at its upper and lower extremities, so as to be able to clear the door frame 5 when the slave leaf 1 is in its closed position.

A gasket seal is mounted around the outer frame 5 so as to contact the door leaves around their peripheries when in their closed positions. (In these two cases, each door leaf comprises a sash into which glazing panes are set; it is the sash which contacts the seal around the periphery of each door leaf.) Since the meeting stile has been cut away at its upper and lower ends, along the dotted line labelled 11, there is a gap between the points labelled a and b, when the door leaves are closed, in which the seal does not contact either a door leaf or the meeting stile. A draught excluder must therefore be mounted on the upper and lower parts of the door frame, in those regions where the meeting stile has been cut away (i.e. across the gap between the inner vertical edges 13 and 15 of the leaves 1 and 3 respectively), to prevent draughts from travelling through the door unit.

The presence of this draught excluder in specific regions of the outer frame is unsightly. The draught excluder can also sometimes work free of the outer frame, again adversely affecting the appearance of the door unit and also rendering it ineffective as a draught excluder.

Often, the leaves of a double door unit can "drop" on their hinges, hanging lower in the door frame than they were originally intended to do, and a draught excluder secured to the lower part of the door frame can therefore be rubbed off by the action of the door leaves opening and closing across it.

It should be noted that the internal walls of the extruded PVCu meeting stiles 7 are of average thickness 1.5mm. However, neither stile has an internal wall positioned so as to form a continuation of the slave leaf surface 9 in its upper and lower regions when the stile is cut away to clear the door frame 5.

The conventional double door unit illustrated in Figure 2 is closely similar to that shown in Figure 1. Figure 2A is a horizontal section through that part of the door unit at which the slave leaf 31 is mounted on outer door frame 33, and Figure 2B is a horizontal section through that part of the unit where the slave leaf 31 meets live leaf 35 at door meeting stile 37, which is carried by the slave leaf.

In the door unit shown, each door leaf comprises a glazed sash 39 made from extruded PVCu, from which outer frame 33 and meeting stile 37 are also made. Elements labelled 41 are steel reinforcing members, located internally of the PVCu components, to increase their rigidity and resistance to thermal expansion. Elements labelled 43 are sealing gaskets.

It can be seen from Figure 2B that the meeting stile 37 protrudes beyond the front surface 45 of slave leaf 31, and thus overlays part of the outer frame 33. When the meeting stile is cut away to remove this protruding portion at its upper and lower ends, so as to clear the frame 33, this leaves an unsealed gap between the points labelled 47 and 49 i.e. between the inner vertical edges of the slave and live leaves. In this region, the seal 51, which is mounted on the frame 33 so as to abut the peripheries of both door leaves when in their closed positions, does not contact any part of a door leaf or the meeting stile. Draughts can therefore pass through this gap from one side of the door unit to the other, unless a draught excluder is specially installed on the upper and lower parts of the outer frame between points 47 and 49.

In all three conventional door units illustrated in Figures 1 and 2, complicated and expensive dust and draught stopping mouldings are usually required, to seal the top and bottom of the units.

Figures 3 and 4 illustrate schematically a door meeting stile and double door unit in accordance with the invention. Figure 3 shows part of a horizontal section taken through the door unit, in the region of the meeting stile, and Figure 4 is part of a vertical section taken along the line IV-IV in Figure 3.

In Figure 3, the double door unit illustrated comprises two door leaves, a live leaf 61 and a slave leaf 63, which meet at door meeting stile 65 carried by the slave leaf. The regions of contact between the live leaf 61 and the meeting stile 65 are sealed using neoprene or similar seals 67.

Whilst the internal profile of the meeting stile is not shown in detail, it can be seen that the stile has at least one internal wall, part of which is labelled 69, which runs parallel to the plane of the front surface 71 of the slave leaf, and extends across the gap between the slave and live leaves. When the upper and lower extremities of the stile 65 are cut away in the position indicated by the dashed line 73 (ie along the plane of the surface 71), it can be seen that part of the internal wall 69 still remains, even in these upper and lower regions of the stile, to form a continuous extension of the front surface 71 of the slave leaf.This wall, which extends virtually all the way across the gap between the two door leaves, is then available to abut a door seal positioned around the periphery of the outer door frame of the unit (not shown in Figure 3, but analogous to 51 in Figure 2A).

A small clearance gap 75 allows for the live leaf 61 to be opened and closed even when the slave leaf 63 and meeting stile 65 are in their closed positions in the door frame. This gap 75, across which the internal wall 69 of the meeting stile does not extend, is sealed using a small section of wool pile 77, approximately the width of a paintbrush, secured to the inside vertical edge of the meeting stile 65 so as to brush against the neighbouring vertical edge of the live leaf 61. This serves to prevent draughts passing through the one vulnerable region of the door unit. As an alternative to the draught excluder 77, a similar seal or brush could equally be attached to the upper and lower parts of the outer door frame in the relevant regions, extending so as to contact the upper and lower cut-off surfaces respectively of the meeting stile.It should be noted that component 77, whilst functioning as a draught excluder, should nevertheless be sufficiently resilient to allow the live leaf 61 to open and close through the clearance gap 75.

Figure 4 shows, by means of a vertical cross-section, how the meeting stile 65 is cut off at its lower end so as to clear the lower, upstanding, part of the outer door frame 79 when the slave leaf 63 is in its closed position. A door seal 81, mounted around the entire periphery of the door frame 79, usually abuts the front surface 71 of the slave leaf 63 when the latter is in its closed position.

In the region of the meeting stile, the seal 81 abuts internal surface 69 of the stile, which remains as an extension of the front surface 71 of the slave leaf even in that region where the meeting stile has been cut away.

Thus, an effective seal against draughts is maintained around virtually the whole of the door frame, except in the relatively small region of the clearance gap 75 illustrated in Figure 3.

The inset drawing, Figure 4A, is a schematic front view of the double door unit illustrated by means of Figures 3 and 4. Again, 79 is the outer door frame, 65 the door meeting style, 61 the live door leaf and 63 the slave door leaf (both leaves shown in their closed positions).

The regions indicated by the reference number 83 are those in which, in conventional door units, a draught excluder would need to be fitted to the upper and lower parts of the door frame but where, in a door unit in accordance with the invention, an internal wall of the meeting stile is used to seal most of the gap between the two door leaves.

Figure 5 shows part of a horizontal section taken through a double door unit in accordance with the invention.

Here, live door leaf 91 meets slave leaf 93 at meeting stile 95. The stile is secured to the slave leaf by means of securing screw 97. Details of the internal walls of the meeting stile, which is manufactured from extruded PVCu, are also shown.

One of the internal walls of the stile, 99, is so positioned that when the upper and lower extremities of the meeting stile are cut away so as to clear the door frame 101 when the slave leaf is in its closed position, the remaining part of the internal wall 99 forms a continuation of the front surface 103 of the slave leaf 93. In the case of the door unit shown in Figure 5, the internal wall 99 does not extend fully across the gap between the inner vertical edges of the slave and live door leaves. However, even a part continuation of the front surface 103 means a reduction in the size of the vulnerable regions of the door unit, and thus also of draught excluders needed to protect those regions.Part of the meeting stile is shown cut away so as to reveal the line 105, indicating the position at which the upper and lower regions of the meeting stile are cut away to clear the door frame 101. This line can be seen to be a continuation of front surface 103 of the slave leaf 93.

107 is a steel reinforcing member, located inside the PVCu meeting stile 95 so as to increase its strength, rigidity and resistance to thermal expansion.

Details of that part of the outer frame 101 above which the two door leaves sit when in their closed positions are shown in the gap between the two leaves in Figure 5.

Seal 109, mounted on the live leaf 91, and seal 111, mounted on the meeting stile, protect the interfaces between these two components of the door unit.

Figure 6 is part of a vertical section taken along the line VI-VI in Figure 5. The door seal 113, carried around the periphery of the door frame 101, can be seen to abut the internal wall 99 of meeting stile 95, in those regions where the meeting stile has been cut away to clear the door frame 101. In that region, of the gap between the two closed door leaves, across which the internal wall 99 does not extend, a wool pile draught excluder 115 is secured to the undersurface of the cutoff meeting stile 95. In this case, the wool pile strip 115 has a self-adhesive backing, by means of which it is secured to the meeting stile 95. It may extend across the whole of the gap between the slave and live door leaves, and serves to complete sealing of the door unit in the region of the meeting stile.Naturally, a corresponding draught excluder would be needed at the upper end of the meeting stile (not shown in Figure 6).

117 is an additional door seal, carried around the inner periphery of slave leaf 93, which abuts the back part of the door frame 101 when the slave leaf is in its closed position.

An alternative door unit to that shown in Figures 5 and 6 is illustrated in Figures 7 and 8, the former being part of a horizontal section taken through the alternative door unit and the latter being the lower part of a vertical section taken through the unit. 121 is the live door leaf, 123 the slave door leaf, 125 the meeting stile, 127 the relevant internal wall of the meeting stile and 135 the outer frame of the door unit.

The unit of Figures 7 and 8 is very similar to that shown in Figures 5 and 6, except that draught excluder 133 has been secured to the cut-off surface of meeting stile 125 by means of screw 131 located in screw port 129. Two such screw ports are provided in the stile 125, one at either side of the gap between the two door leaves.

Figure 9 shows part of a horizontal section taken through a further, preferred, example of a double door unit in accordance with the invention, shown in the region of the door meeting stile. The unit comprises a live door leaf 141 and a slave door leaf 143, which latter carries the door meeting stile 145 at which the two leaves meet when in their closed positions. The stile is secured to the slave leaf 143 by means of screw 147.

In this case, the meeting stile is made from extruded PVCu, as are the frames of the slave and live door leaves, which carry glass or polycarbonate glazing panels (not seen). Steel reinforcing members 149 are located inside the various PVCu components.

The line 151, extending across internal wall 153 of the meeting stile, indicates the position at which the stile must be cut away in order to clear the top and bottom parts of the outer door frame 155. This line 151 can be seen to be a continuation of the front surface 157 of slave leaf 143.

Internal wall 153 extends virtually the whole of the way across the gap between the inner vertical edges 159 and 161 of the slave and live door leaves respectively. This is preferable to the situation shown in Figures 5 - 8, where the internal wall does not extend fully across the gap. In the unit shown in Figure 9, only a small clearance gap 163 needs to be left between the stile and the live leaf, to allow the live leaf to open and close past the stile. This gap can easily be sealed by means of draught excluder 165 (a thin strip of wool pile).

Figure 10 is part of a schematic vertical section taken through the door unit shown in Figure 9, in the region of the meeting stile 145. 167 is a door seal, mounted around the periphery of the door frame 155, which abuts the front surfaces of the two door leaves, when in their closed positions, and internal wall 153 of the meeting stile.

Since a component manufactured from extruded PVCu can be constructed to have virtually any desired internal profile, the present invention lends itself to embodiment in extruded PVCu door meeting stiles, in which an appropriately positioned internal wall can be co-extruded with the main body of the stile so as to provide an effective seal in the region of the stile in an assembled door unit. Thus, complete and effective sealing of the unit against dust and draughts can be achieved without the need for separate, often complicated and expensive, sealing components.

Claims

1. A door meeting stile capable of being carried by a door leaf for use in a double door unit, the stile having an internal wall at least part of which occupies a region of the stile which does not protrude beyond the outer surface of a door leaf by which it is carried, the internal wall of the stile being such that if the stile is cut away in the plane of the outer surface of the door leaf, in the upper and/or the lower region of the stile, at least part of the internal wall remains as a continuation of that outer surface, so as to extend in use across at least part of the gap which would exist between the two door leaves of the double door unit when in their closed position.

2. A door meeting stile according to Claim X, wherein the internal wall forms a continuation of the outer surface of a door leaf by which it is carried, when the stile is cut away in the plane of that outer surface, along the entire height of the door leaf, between and including those regions of the door leaf where the outer surface abuts in use the upper and lower parts respectively of the door frame of the double door unit or any seal provided on the door frame.

3. A door meeting stile according to Claim 1 or Claim 2, wherein the internal wall, when the meeting stile is cut away in the plane of the outer surface of the door leaf by which the stile is carried, extends as a continuation of the outer surface of the door leaf as far as is possible whilst still allowing clearance for the other leaf in a double door unit in which the stile is in use to open and close when the stile carrying leaf is closed against the frame of the unit.

4. A meeting stile according to any one of the preceding claims, made from extruded PVCu or aluminium.

5. A meeting stile according to any one of Claims 1-3, made from extruded PVCu and reinforced by means of an internally located reinforcing member.

6. A meeting stile according to Claim 5, wherein the reinforcing member is made of steel.

7. A meeting stile according to any one of the preceding claims, additionally comprising a seal which, in use, is adapted to abut that door leaf of the door unit by which the stile is not carried, thus to seal the interface between the stile and the door leaf when both leaves of the door unit are in their closed positions.

8. A door meeting stile capable of being carried by a door leaf for use in a double door unit, the stile being substantially as herein described with reference to the accompanying illustrative Figures 3-10.

9. A door leaf for use in a double door unit, carrying a door meeting stile according to any one of the preceding claims.

10. A door leaf according to Claim 9, comprising a door sash carrying one or more glazing panes.

11. A door leaf according to Claim 10, wherein the meeting stile carried by the door leaf is formed as an integral part of the door sash.

12. A door leaf according to Claim 9 or Claim 10, wherein the meeting stile carried by the door leaf is secured to the door leaf by means of securing means.

13. A door leaf for use in a double door unit, the door leaf being substantially as herein described with reference to the accompanying illustrative Figures 3 10.

14. A double door unit comprising two door leaves hingedly mounted in a door frame so as to be moveable relative to one another between a closed position and an open position, wherein the door leaves meet in their closed position at a door meeting stile according to any one of Claims 1-8, the stile being carried by one of the two door leaves and the stile having been cut away in the plane of the outer surface of the door leaf by which it is carried, at least to an extent so as to allow the door leaves to occupy their closed position in the door frame without obstruction by the meeting stile.

15. A double door unit according to Claim 14, in which at least one of the door leaves comprises a door sash carrying one or more glazing panes.

16. A double door unit according to Claim 15, wherein the door leaf by which the stile is carried comprises a door sash, and the meeting stile is formed as an integral part of that door sash.

17. A double door unit according to any one of Claims 14 16, wherein any portion of the gap between the inner vertical edges of the two leaves of the door unit, across which the internal wall of the meeting stile does not extend when the stile has been cut away in the plane of the outer surface of the door leaf by which the stile is carried, is sealed with sealing means.

18. A double door unit according to Claim 17, wherein sealing means is attached to the door frame in the region which the door meeting stile will occupy when the door leaves are in their closed position, the sealing means being positioned so as to bridge the vertical gap between the door frame and that part of the meeting stile which has not been cut away to clear the door frame.

19. A double door unit according to Claim 17, wherein sealing means is attached to the upper and/or lower edge of the meeting stile, in its cut away regions, the sealing means being positioned so as to bridge the vertical gap between the door frame and that part of the meeting stile which has not been cut away to clear the door frame, when the door leaves are in their closed position.

20. A double door unit according to any one of Claims 13 19, wherein one or more seals are mounted on the "live" door leaf, which does not carry the door meeting stile, to abut the stile when the said live leaf is in its closed position and hence seal the interface between the live leaf and the stile.

21. A double door unit substantially as herein described with reference to the accompanying illustrative Figures 3-10.