Patent Description:
Window and door coverings such as blinds are widely used and are typically attached to the frame of a window or door by adhesive or by mechanical fixings such as screws. Whilst such methods of fixing a blind to a window or door may provide an adequate structural connection, it requires permanent holes to be formed in the frame, or requires surfaces of the frame to have adhesive applied thereto which my not be easily removed should the blind ever be removed or replaced. Moreover, the successful installation of such attachment arrangements is often highly dependent on the skill of the installer, the placement of screws and adhesive often involving an element of judgement.

<CIT> discloses a holder for sun protection devices for attachment to a frame (<NUM>) in which a pane (<NUM>) is held by means of a seal (<NUM>), comprising a retaining clip (<NUM>) whose front area (<NUM>) is designed to be pushed under the seal (<NUM>). and a retaining element (<NUM>) which can be placed on the retaining clip (<NUM>) and has a coupling means for the sun protection devices (<NUM>), characterized in that the retaining clip (<NUM>) and the retaining element (<NUM>) are connected via a self-locking plug connection (4th ) are detachably connected to each other.

<CIT> discloses a window blind frame <NUM> is releasably secured to a window casing <NUM> using a clip <NUM>. Preferably the clip <NUM> comprises a flange <NUM> and a support <NUM> extending from the flange and having a frame engaging member <NUM>. Preferably the flange <NUM> is for releasable insertion between a window casing <NUM> and a glass pane mounted therein, more preferably between a glazing bead <NUM> and the glass pane. The window blind frame <NUM> preferably comprises angle joints connecting extruded portions <NUM> to form a rigid structure. Preferably the angle joints are inserted into channels in the extruded portions <NUM>, the angle joints may be concealed by covers <NUM>.

<CIT> discloses a tool (<NUM>) for use in locating in its position of use a supporting device for a window blind apparatus, the supporting device comprising at least one laterally projecting portion adapted to slide in use between a glass pane and a resilient retaining bead which bears against the glass pane, the tool comprising a body portion (<NUM>) and a cavity (118A,118B) configured to receive therein a first portion of said supporting device such that the laterally projecting portion of the supporting device projects from the body portion of the tool, whereby the supporting device can be urged by use of the tool to move in a direction effective to insert said laterally projecting portion between the glass pane and the bead. Also disclosed are a method of using the tool and a kit of parts including the tool.

It is desirable to provide a window or door covering which may be easily and efficiently attached to a window or door frame, or other portion of a window or door, without the requirement to use adhesive or mechanical fixings which leave permanent damage, and an attachment arrangement for a window or door covering which may permit such an attachment.

The present disclosure provides an attachment arrangement for a window or door covering as detailed in claim <NUM> and a window or door covering as claimed in claim <NUM>. Advantageous features are provided in dependent claims.

According to the invention there is provided an attachment arrangement according to claim <NUM>.

Advantageously, the window or door covering can be quickly and conveniently attached to the window or door without causing permanent damage to the window or door.

Ideally, the at least one attachment means comprises at least one two-part attachment means. Preferably, the at least one two-part attachment means is at least one interlocking two-part attachment means.

Ideally, the first and second parts of the at least one attachment means comprise mutual engagement features.

Preferably, the mutual engagement features are interlocking engagement features.

Ideally, the mutual engagement features are mutually engagable slots.

Preferably, the mutually engagable slots are alignable such that the second part of the at least one attachment means is slidable into the slot of the first part thereof.

Ideally, the first part of the at least one attachment means is a generally L-shaped part comprising a mutual engagement portion which comprises the mutual engagement features thereof.

Preferably, the first part of the at least one attachment means comprises an insertion portion shaped and dimensioned for insertion between the beading and the glazing of a window or door.

Ideally, the insertion portion of the first part of the at least one attachment means extends generally perpendicularly to the mutual engagement portion thereof.

Ideally, the second part of the at least one attachment means is a generally L-shaped part comprising a mutual engagement portion which comprise the mutual engagement features thereof.

Preferably, the second part of the at least one attachment means comprises a guide engagement portion which extends generally perpendicularly to the mutual engagement portion and is shaped and dimensioned for attachment to the guide means.

Ideally, the guide engagement portion of the second part of the at least one attachment means extends generally perpendicularly to the mutual engagement portion thereof.

Ideally, the first part of the at least one attachment means is insertable between the beading and glazing of a window or door frame on the head rail and/or sill rail of said frame.

Preferably, the first part of the at least one attachment means is inserted between the beading and glazing of a window or door frame on the head rail and/or sill rail of said frame and the second part of the at least one attachment means is slidable laterally into engagement with the first part thereof, in a direction towards a side rail of the window or door frame.

Ideally, the window or door frame is a sash frame of a window or door.

Preferably, the window or door covering comprises four attachment means, one attachment means being locatable at each corner of a window/door frame.

Ideally, the four attachment means form first and second opposing sets of attachment means, each opposing set comprising an upper attachment means and a lower attachment means.

Preferably, the opposing sets of attachment means are vertically opposing sets.

Ideally, the guide means comprises first and second generally vertical guide elements which extend along the first and second vertical sides of the frame of the window or door respectively.

Preferably, the first and second generally vertical guide elements extend between the first and second opposing sets of attachment means respectively.

Ideally, the first and/or second generally vertical guide elements comprise intermediate retaining means.

Preferably, the intermediate retaining means comprise a first portion configured for insertion between the beading and glazing of a window or door and a second portion configured to engage with and retain the generally vertical guide element.

Ideally, the intermediate retaining means are locatable, in use, between the upper and lower ends of the generally vertical guide element and most preferably proximal the middle of said guide element.

Preferably, the rail connecting means comprises a first rail connection feature locatable on the guide means which cooperates with a second rail connection feature locatable on a rail of the window or door covering.

Ideally, the first and second rail connection features are engagable to attach the rail of the window or door covering to the guide means.

Preferably, one of the first or second rail connection features is a male connection feature, and the respective other rail connection feature is a female connection feature.

Ideally, the first and second rail connection members form a snap-fit type engagement therebetween.

Preferably, the window or door covering comprises a cap element deployable over the portions of the at least one interlocking two part attachment means which, in use, interlock.

Ideally, the cap element comprises a throughbore sized and dimensioned to receive cord elements associated with a window covering arrangement.

Preferably, the cord elements are attachable to the cap element via a mechanical fastening element.

Ideally, the cord elements are attachable to the cap element via a grub screw.

An embodiment of the invention is now described by way of example and with reference to the accompanying drawings in which:.

The present teaching will now be described with reference to an exemplary window or door covering. It will be understood that the exemplary window or door covering is provided to assist in an understanding of the present teaching and are not to be construed as limiting in any fashion. Furthermore, elements or components that are described with reference to any one Figure may be interchanged with those of other Figures or other equivalent elements without departing from the scope of the appended claims.

Referring now to the Figures there is illustrated a window or door covering <NUM> comprising an attachment arrangement <NUM>. The description below may hereinafter refer to a window covering <NUM> and a window <NUM> to which it may be applied, however it should be understood that the covering could be applied to a door or any other such suitable glazed opening in a building. It should also be understood that any reference to upper/lower or like refer to positions relative to the window or door to which the covering is to be applied. The attachment arrangement <NUM> comprises four attachment elements/means <NUM> having first parts thereof 25a, 25b, 26a, 26b insertable between the beading and the glazing of a window <NUM>, and two guides <NUM>, <NUM>. It should be noted that further attachment elements <NUM> and/or guides <NUM>, <NUM> may be utilised if the window or door covering is intended to span a window or door of greater size. In the embodiment of the drawings, one attachment element <NUM> is locatable at each corner of the window frame <NUM>. By window frame <NUM>, it is generally meant a sash frame <NUM>; however the attachment arrangement could be used with other frames. The corners of the frame <NUM> referred to herein are internal corners <NUM>, <NUM>, <NUM>, <NUM> of the frame <NUM> where the head rail <NUM> and sill rail <NUM> meet the side rails <NUM>, <NUM> of the frame <NUM>. As is best viewed in <FIG>, the first parts 25a, 25b, 26a, 26b of the four attachment elements <NUM> form first and second opposing sets 25a, 25b, 26a, 26b. Each opposing set 25a, 25b, 26a, 26b comprise an upper first part 25a, 26a and a lower first part 25b, 26b. The opposing sets of first parts 25a, 25b, 26a, 26b are vertically opposing sets such that a guide <NUM>, <NUM> extends between each opposing set 25a, 25b, 26a, 26b. A first guide <NUM> extends between the first opposing set of first parts 25a, 25b and a second guide <NUM> extends between the second set of opposing first parts 26a, 26b. The guide elements <NUM>, <NUM>, when attached to the opposing sets of first parts 25a, 25b, 26a, 26b, extend along the first and second interior vertical sides <NUM>, <NUM> of the frame <NUM> of the window. The guide elements extend generally parallel to the glazing of the window. The guides <NUM>, <NUM> are engagable with the attachment elements <NUM> such that the attachment elements act to attach the guides <NUM>, <NUM> to the window. The attachment arrangement <NUM> further comprises a rail connection element <NUM>, 29a for attaching rail members <NUM>, <NUM>, <NUM> of a window covering to the guides <NUM>, <NUM>.

The attachment elements <NUM> are attachment brackets <NUM> which further comprise second parts 33a, 33b, 34a, 34b, one attachable to each end of the guides <NUM>, <NUM>, the second parts 33a, 33b, 34a, 34b being mutually engagable with the first parts 25a, 25b, 26a, 26b of the attachment elements. The second parts 33a, 33b, 34a, 34b comprise upper second parts 33a, 34a attachable to the upper ends of the guides <NUM>, <NUM> and which are mutually engagable with the upper first parts 25a, 26a of the engagement elements <NUM> to form an engagement therebetween and therefore attach the upper ends of the guides <NUM>, <NUM> to the head rail <NUM> of the window frame <NUM>. The second parts 33a, 33b, 34a, 34b comprise lower second parts 33b, 34b attachable to the lower ends of the guides <NUM>, <NUM> and which are mutually engagable with the lower first parts 25b, 26b of the attachment elements <NUM> to form an engagement therebetween and therefore attach the lower ends of the guides <NUM>, <NUM> to the sill rail <NUM> of the window frame <NUM>.

The first 25a, 25b, 26a, 26b and second parts 33a, 33b, 34a, 34b of the attachment elements interlock. The first 25a, 25b, 26a, 26b and second parts 33a, 33b, 34a, 34b of the attachment elements comprise mutual interlocking engagement features <NUM>, 35a. In the embodiment of the drawings, the interlocking engagement features <NUM> comprise mutually engagable slots <NUM>, 35a. The first parts 25a, 25b, 26a, 26b and second parts 33a, 33b, 34a, 34b each comprise a slot <NUM>, 35a therein and the slot 35a of each second part 33a, 33b, 34a, 34b is alignable with the slot <NUM> of each first part 25a, 25b, 26a, 26b such that the second part 33a, 33b, 34a, 34b may be slid onto the first part 25a, 25b, 26a, 26b, the slot of the second part 33a, 33b, 34a, 34b moving into the slot of the first part 25a, 25b, 26a, 26b until an end wall <NUM> of the slot of the second part 33a, 33b, 34a, 34b abuts an end wall <NUM> of the slot of the first part. The slidable engagement between the first and second parts 25a, 25b, 26a, 26b, 33a, 33b, 34a, 34b of the engagement elements can be best viewed in <FIG> which illustrates the engagement in relation to the upper left attachment element comprising first and second parts 25a, 33a. It should be noted that the remainder of the attachment elements <NUM> operate in substantially the same manner. <FIG> shows the second part 33a attached to the guide <NUM>. The window and frame have been removed to aid clarity of the drawing, however an insertion portion <NUM> of the first part 25a would be inserted between the beading and the glazing of the window prior to sliding of the second part 33a towards the first part. Once the first part 25a is in place with its insertion portion <NUM> between the beading and the glazing, the second part 33a is slid laterally towards the first part 25a with their respective slots <NUM>, 35a aligned such that the slot 35a of the second part 33a travels into the slot <NUM> of the first part 25a until the end wall <NUM> of the slot 35a of the second part 33a abuts the end wall <NUM> of the slot <NUM> of the first part 25a. As can be seen in <FIG>, the first and second parts 25a, 33a comprise first abutment portions <NUM>, <NUM> which are mutually shaped such that, when the first and second parts 25a, 33a are in engagement, the upper surface <NUM> of the first abutment portion <NUM> of the second part 33a abuts the lower surface <NUM> of the first abutment portion <NUM> of the first part 25a such that said upper and lower surfaces <NUM>, <NUM> extend generally co-planarwhen the first and second parts 25a, 33a are in engagement. The first part 25a of the attachment element <NUM> is a generally L-shaped part 25a comprising a mutual engagement portion <NUM> which comprise the slot <NUM> and the insertion portion <NUM> which extends generally perpendicularly to the mutual engagement portion <NUM> and is shaped and dimensioned for insertion between the beading and the glazing of a window or door. The insertion portion <NUM> and mutual engagement portion <NUM> are joined at a bend section <NUM> such that they extend, at least partially, perpendicularly to each other. The second part 33a of the attachment element is also a generally L-shaped part which takes a similar form to the first part 25a and comprising a mutual engagement portion <NUM> which comprises the slot 35a thereof and a guide engagement portion <NUM> which is joined to the mutual engagement portion <NUM> by a bend section <NUM>, extends generally perpendicularly to the mutual engagement portion <NUM>, and is shaped and dimensioned for attachment to the guide <NUM>. As can be seen in <FIG>, when the first and second parts 25a, 33a of the attachment elements <NUM> are in engagement, the attachment element <NUM> forms a T-shaped engagement element <NUM> with the insertion portion <NUM> of the first part 25a extending upwards between the beading and glazing of the window, the guide engagement portion <NUM> of the second part 33a extending downwardly into engagement with the guide <NUM>, and the mutual engagement portions <NUM>, <NUM> being engaged and forming a combined flange extending outwardly from the window or door. It should be noted, that whilst the first and second parts of the attachment elements are shown in the drawings and herein described as L-Shaped, this should not be understood as limiting as the skilled person would be aware that the first and second parts could perform a similar function should the portions thereof not extend perpendicularly to each other but rather at an off perpendicular angle relative to each other. The first abutment portions <NUM>, <NUM>, of the first and second parts 25a, 33a of the engagement elements <NUM> extend generally from the bend portions <NUM> thereof to a first side <NUM> of their respective slots <NUM>, 35a. The first and second parts 25a, 35a, further comprise bent end sections <NUM>, <NUM> which begin at a second side <NUM> of their respective slots <NUM>, 35a opposing the first side thereof. When the first and second parts 25a, 33a are in engagement, the bent end section <NUM> of the first part 25a bends downwards through the slot 35a of the second part 33a and terminates at an end flange <NUM>. The bent end section <NUM> of the second part 33a bends upwards through the slot <NUM> of the first part 25a and terminates at an end flange <NUM>. Resultantly, when the first and second parts 25a, 33a are in engagement, the end flange <NUM> of the first part 25a is located below the end flange <NUM> of the second part 33a. This forms an interlocking arrangement wherein the first part 25a transitions from a section which is above the second part 33a on the side of the slots <NUM>, 35a furthest from the end flange to a section at the end flange <NUM> which is below the second part 33a. Again, the general interlocking arrangement of the attachment elements <NUM> is descried in relation to the upper left attachment element comprising first and second parts 25a, 33a, however the four attachment elements <NUM> all function and engage in a similar manner. It should be noted that, viewed from internally of the window as is shown in <FIG>, the right hand set of opposing first parts 26a, 26b would comprise slots <NUM> which, when the first parts 26a, 26b are inserted between the beading and the glazing, extend from the left hand edge <NUM> of the first parts <NUM>, 26a. As such, the right hand second parts 34a, 34b which engage with the right hand first parts 26a, 26b comprise a slot 35a which extends from a right hand edge thereof such that the right hand second parts 34a, 34b may be slid onto the right hand first parts 26a, 26b in a left to right movement. Similarly, the left hand set of opposing first parts 25a, 25b would comprise slots <NUM> which, when the first parts 25a, 25b are inserted between the beading and the glazing, extend from the right hand edge <NUM> of the left hand first parts <NUM>, 25a. As such, the left hand second parts 33a, 33b which engage with the left hand first parts 25a, 25b comprise a slot 35a which extends from a left hand edge thereof such that the left hand second parts 33a, 33b may be slid onto the left hand first parts 26a, 26b in a right to left movement. This results in the first parts 25a, 25b, 26a, 26b essentially comprising two variants, a first variant <NUM> for use on the top left and bottom right corner of the window, and a second variant <NUM> for use on the bottom left and top right of the window. These two variants are best viewed in <FIG> and <FIG> in conjunction.

As can be viewed in <FIG>, the guides <NUM>, <NUM> may comprise intermediate retaining elements <NUM>. The guides <NUM>, <NUM> are identical guides which are simply orientated for their use on their respective sides of the window. The intermediate retaining elements <NUM> are useful to further retain the guides <NUM>, <NUM> when the window to which the covering is attached has a greater height, providing greater stability in such situations. The intermediate retaining elements <NUM> comprise a first portion <NUM> configured for insertion between the beading and glazing of a window and a second portion <NUM> configured to engage with and retain the guides14, <NUM>. The second portion <NUM> is a hook shaped portion <NUM> which hooks a portion of a guide <NUM>, <NUM> and acts to retain said guide <NUM>, <NUM> in position. In use, as the intermediate retaining elements <NUM> are slid to insert their first portion <NUM> between the beading and glazing of a window, the hook shaped portion <NUM> engages with the guide <NUM>, <NUM> and draws towards the side rail <NUM>, <NUM> of the frame <NUM>. <FIG> illustrate the installation of an intermediate retaining element <NUM> on the left hand guide <NUM>, however it should be understood that the right hand guide <NUM> would have a similar intermediate retaining element <NUM>. In addition, any number of intermediate retaining elements <NUM> may be provided along the longitudinal length of the guides <NUM>, <NUM> as would be required by the height of the window.

As is best viewed in <FIG>, the rail connecting element <NUM>, 29a comprises a first rail connection feature <NUM> locatable on the guide means <NUM>, <NUM> which cooperates with a second rail connection feature <NUM> locatable on the rear side of a rail <NUM>, <NUM>, <NUM> of a window covering. The first and second rail connection features <NUM>, 29a are engagable to attach the rail to the guide means. The first rail connection feature is a protruding formation <NUM> and the second rail connection feature 29a comprises a recess <NUM> formed for receiving the protruding formation <NUM>. The second rail engagement feature <NUM> further comprises an overhanging lip <NUM> which restricts the size of an opening of the recess <NUM> such that insertion of the protruding formation <NUM> into the opening causes the overhanging lip <NUM> to elastically deform to permit entrance of the protruding formation in to the recess <NUM>. Once the protruding formation <NUM> moves into the recess <NUM> a distance wherein a rear end <NUM> thereof passes the overhanging lip <NUM>, the overhanging lip <NUM> may move back to its original pre-deformed position and acts to retain the protruding formation <NUM> in the recess <NUM>. Alternatively, or in combination, insertion of the protruding formation <NUM> through the opening of the recess <NUM> may cause elastic deformation of the protruding formation <NUM> such that it deforms to pass the overhanging lip <NUM> and then returns to its pre-deformed shape once in the recess <NUM>. The first and/or second rail retaining features <NUM>, 29a are manufactured from aluminium. The first and second rail connection features <NUM>, 29a form a snap-fit type engagement therebetween. The second rail connection feature <NUM> is preferably disposed on a sliding carriage <NUM> such that it may be slid towards the first rail connection feature <NUM>. The sliding carriage is in slidabe engagement with the rail elements <NUM>, <NUM>, <NUM>. Such a sliding carriage may be implemented in any typical manner, many of which would be known to the skilled person. The rail elements <NUM>, <NUM>, <NUM> comprise second rail connection features 29a on each side thereof such that each rail element forms a connection with both guides <NUM>, <NUM>.

The window or door covering <NUM> also comprises cap elements <NUM> which are deployable over the portions of the attachment elements <NUM> which, in use, interlock. This can be best seen in <FIG>. The cap elements <NUM> prevent movement/detachment of the first and second parts 25a, 25b, 26a, 26b, 33a, 33b, 34a, 34b of the attachment elements <NUM>. The cap elements <NUM> comprise a throughbore <NUM> sized and dimensioned to receive cord elements <NUM> associated with the window covering <NUM>. The cord elements <NUM> may come pre-installed in the throughbores <NUM> of the cap elements <NUM>.

It should be noted that the window covering could be a horizontal window covering, a vertical window covering, a roller window covering, or any other such window covering. The attachment arrangement could be easily utilised/adapted to attach various types of window covering. Moreover, the window covering would comprise typical functional components such as slats, cord systems etc. as are well known to the skilled person and will not be repeated herein for brevity.

The window covering may also be provided with an installation tool <NUM> which can be seen in <FIG>, <FIG>, <FIG> in use. Detail views of the installation tool can be seen in <FIG>. The installation tool <NUM> is a multipurpose tool comprising a first side <NUM> shaped and dimensioned to engage with and guide insertion of the first parts 25a, 25b, 26a, 26b of the attachment elements <NUM> between the beading and glazing or a window or door. The installation tool further comprises a second side <NUM> shaped and dimensioned to engage with and guide insertion of the intermediate retaining elements <NUM> between the beading and glazing of a window or door. Finally, the installation tool comprises a third side <NUM> shaped and dimensioned to engage with and slide the sliding carriage <NUM> of the second rail connection feature 29a. The installation tool further comprises a handle <NUM> such that user may engage with and push the installation tool as required to carry out the aforementioned installation actions.

The window covering and attachment arrangement thereof described herein permits attachment of a window covering to a window or door without the use of adhesive or mechanical fixings such as screws or the like. The first parts 25a, 25b, 26a, 26b of the attachment elements <NUM> are inserted between the beading and glazing or a window or door to form an anchor to which the second parts 33a, 33b, 34a, 34b and associated guides <NUM>, <NUM> may be attached. Rails <NUM>, <NUM>, <NUM> of the window covering may then be attached to the guides <NUM>, <NUM>. Advantageously, the window or door covering <NUM> can be quickly and conveniently attached to the window or door without causing permanent damage thereto.

In use, and in more detail, the first parts 25a, 25b, 26a, 26b of the attachment elements <NUM> are inserted, using the installation tool <NUM> between the beading and glazing of the window. The second parts 33a, 33b, 34a, 34b of the attachment elements <NUM> are attached to the ends of the guides (or come pre-attached in this manner), and thereafter the second parts 33a, 33b, 34a, 34b of the attachment elements <NUM> are slid into engagement with the first parts 25a, 25b, 26a, 26b thereof such that the guides <NUM>, <NUM> become attached to the window. If required, intermediate retaining elements <NUM> are installed by sliding, using the installation tool <NUM>, said intermediate engagement elements <NUM> between the beading and the glazing of the window at each side frame <NUM>, <NUM> of the window. The intermediate engagement elements hook the guides <NUM>, <NUM> and thus retain said guides <NUM>, <NUM> in place. The rail elements <NUM>, <NUM>, <NUM> of the window covering may then be attached to the guides <NUM>, <NUM> by sliding, again using the installation too <NUM>, the sliding carriage <NUM> towards a side rail <NUM>, <NUM> of the frame such that the second rail connection feature 29a engages with the first rail connection feature <NUM>. This is carried out on both sides of the rail elements <NUM>, <NUM>, <NUM> such that each rail element forms a connection with both guides <NUM>, <NUM>. Cap elements <NUM>, which carry cord elements <NUM> of the window covering through throughbores <NUM> thereof, may then be placed over the portions of the attachment elements <NUM> which interlock. Preferably, the cap elements <NUM> are connected to the rails <NUM>, <NUM>, <NUM> through a series of cord elements <NUM> and hold the tension of window covering. The blind is now attached and ready for use as shown in the installed configuration of <FIG>.

Claim 1:
An attachment arrangement (<NUM>) for a window or door covering (<NUM>) comprising
at least one attachment means (<NUM>) insertable between the beading and the glazing of said window or door;
at least one guide means (<NUM>, <NUM>) being engageable with the at least one attachment means (<NUM>) such that the at
least one attachment means (<NUM>) is configured to attach the at least one guide means (<NUM>, <NUM>) to the window or door;
wherein the at least one attachment means (<NUM>) comprises a first part (25a, 25b, 26a, 26b) which is insertable
between the beading and the glazing of a window or door and a second part (33a, 33b, 34a, 34b) which is attachable to the at least one guide means (<NUM>, <NUM>), the first and second parts of the at least one attachment means being mutually engagable,
rail connecting means (<NUM>, 29a) for attaching rail members (<NUM>, <NUM>, <NUM>) of the window or door covering , or
a portion thereof, to the at least one guide means (<NUM>, <NUM>) and/or the at least one attachment means (<NUM>); wherein the attachment arrangement (<NUM>) is configured to attach the window or door covering (<NUM>) to said window or door without the use of adhesive or mechanical fixings such as screws or the like which may permanently damage portions of the window or door;
characterized in that the second part (33a, 33b, 34a, 34b) of the at least one attachment means is slidable laterally into engagement with the first part (25a, 25b, 26a, 26b) thereof after said first part has been inserted between said beading and glazing of said window and the second part (33a, 33b, 34a, 34b) of the at least one attachment means is attached to the end of the at least one guide means (<NUM>, <NUM>), such that the at least one guide means (<NUM>, <NUM>) becomes attached to the window or door.