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Title:
CARRIER STRIP, CARRIER FRAME COMPRISING SUCH CARRIER STRIPS AND A FOOT STRIP AND A SUPPORT STRIP FORMING SUCH A CARRIER STRIP
Document Type and Number:
WIPO Patent Application WO/2019/083423
Kind Code:
A1
Abstract:
The invention relates to a carrier strip (la-c, 2) comprising a foot strip (2) and a support strip (la- c). The foot strip has a recessed slot (6a-b, 7a-b). The support strip (la-c) has a roof profile (12), two joint elements (5a-b, 14a-b) and two stop elements (13a-b, 13al-2, 13M-2). The joint elements (5a-b, 14a-b) can lockably engage the recessed slot (6a-b, 7a-b) in the foot strip (2). The stop elements (13a-b, 13al-2, 13M-2) then reach the reception surface of the foot strip (2). The stop elements (13a, 13al-2) are arranged on either side of the joint elements (5a-b, 14a-b). With the carrier strip (la-c, 2) assembled, a portion of the reception surface on the foot strip (2) is exposed on the side of the support strip (la-c). A sheet element may be attached here. The invention further relates to a carrier frame for at least one sheet element (lOa-b), comprising four such carrier strips (1-2). The invention yet further relates to a support strip (la-c) arranged to engage a foot strip (2) and jointly form such a carrier strip (la-c, 2).

Inventors:
BOLK PETERSSON, Bo (Agärdevägen 18, Södertälje, 15144, SE)
Application Number:
SE2018/000029
Publication Date:
May 02, 2019
Filing Date:
October 26, 2018
Export Citation:
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Assignee:
QLEANAIR SCANDINAVIA AB (Box1178, Torggatan 13, Solna, 17123, SE)
International Classes:
E06B3/24; E06B3/06; E06B3/64
Foreign References:
US4266387A1981-05-12
FR2644506A11990-09-21
US3899858A1975-08-19
GB2309236A1997-07-23
DE3841796A11990-06-13
US6088979A2000-07-18
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Claims:
Claims

1 A carrier strip (la-c, 2) comprising a foot strip (2) and a support strip (la-c), where the foot strip comprises at least one reception surface with at least one recessed slot (6a-b, 7a-b) and where the support strip (la-c) comprises at least one roof profile (12), at least two joint elements (5a-b, 14a-b) and at least two stop elements (13a-b, 13al-2, 13bl-2), where the at least two joint elements (5a-b, 14a-b) and the at least two stop elements (13a-b, 13al-2, 13bl- 2) extend from the roof profile (12), and where the at least two joint elements (5a-b, 14a-b) are arranged to lockably engage the at least one recessed slot (6a-b, 7a-b) in the foot strip (2), and the at least two stop elements (13a-b, 13al-2, 13M-2) then reach the reception surface of the foot strip (2), where further at least a first stop element (13a, 13al-2) is arranged on one side of the least two joint elements (5a-b, 14a-b) and at least a second stop element (13b, 13M-2) is arranged on the other side of the at least two joint elements (5a-b, 14a-b), where when the at least two joint elements (5a-b, 14a-b) lockably engage the at least one recessed slot (6a-b, 7a-b) in the foot strip (2), a portion of the reception surface on the foot strip (2) on at least one side of the support strip (la-c) is exposed, characterised in that the support strip is provided with or without at least one wall element (3a-b) where further, for the support strip with at least one wall element (3a-b), at least one wall element (3a-b) extends from the roof profile (12) of the support strip (la-c), where the least one wall element (3a-b) is arranged outside of the outermost stop element (13a-b, 13al-2, 13M-2) such that it, with the foot strip (2) and the support strip (la-c) locked together, extends along an extension of one side of the foot strip (2).

2 A carrier strip according to claim 1, characterised in that the joint elements (5a-b, 14a-b), at their outer ends comprise a hook element (5a-b), arranged to lockably engage an extending edge part (6a-b) in the recessed slot (6a-b, 7a-b) in the foot strip (2).

3 A carrier strip according to claims 1 or 2, characterised in that at least a first of the stop elements (13a-b, 13al-2, 13bl-2), at its outer end is bent towards the at least two joint elements (5a-b, 14a-b), and when the at least two joint elements (5a-b, 14a-b) lockably engage the at least one recessed slot (6a-b, 7a-b) in the foot strip (2), the outer end of the first stop element (13a-b, 13al-2, 13bl-2) forms a recessed slot. A carrier strip according to any one of the preceding claims, characterised in that the roof profile (12) of the support strip (la-c), on at least a first side, extends beyond the outermost stop element (13a-b, 13al-2, 13bl-2) on the first side. A carrier frame for at least one sheet element (lOa-b), comprising four carrier strips (1 -2) attached to each other in a rectangular shape, where at least a first of the carrier strips (la-c, 2) comprises a foot strip (2) and a support strip (la-c), where the foot strip comprises at least one reception surface with at least one recessed slot (6a-b, 7a-b) and where the support strip (l a-c) comprises at least one roof profile (12), at least two joint elements (5a-b, 14a-b) and at least two stop elements (13a-b, 13al-2, 13M-2), where the at least two joint elements (5a-b, 14a-b) and the at least two stop elements (13a-b, 13al-2, 13M-2) extend from the roof profile (12), and where the at least two joint elements (5a-b, 14a-b) are arranged to lockably engage the at least one recessed slot (6a-b, 7a-b) in the foot strip (2), and the at least two stop elements (13a-b, 13al-2, 13 -2) then reach the reception surface of the foot strip (2), where further at least a first stop element (13a, 13al-2) is arranged on one side of the least two joint elements (5a-b, 14a-b) and at least a second stop element (13b, 13b 1-2) is arranged on the other side of the at least two joint elements (5a-b, 14a-b), where when the at least two joint elements (5a-b, 14a-b) lockably engage the at least one recessed slot (6a-b, 7a-b) in the foot strip (2), a portion of the reception surface on the foot strip (2) on at least one side of the support strip (la-c) is exposed, characterised in that the support strip is provided with or without at least one wall element (3a-b) where further, for the support strip with at least one wall element (3a-b), at least one wall element (3a-b) extends from the roof profile (12) of the support strip (la-c), where the least one wall element (3a-b) is arranged outside of the outermost stop element (13a-b, 13al-2, 13bl-2) such that it, with the foot strip (2) and the support strip (la-c) locked together, extends along an extension of one side of the foot strip (2). A carrier frame according to claim 5, characterised in that the joint elements (5a-b, 14a-b), at their outer ends comprise a hook element (5a-b), arranged to lockably engage an extending edge part (6a-b) in the recessed slot (6a-b, 7a-b) in the foot strip (2). A carrier frame according to claims 5 or 6, characterised in that at least a first of the stop elements (13a-b, 13al-2, 13bl-2), at its outer end is bent towards the at least two joint elements (5a-b, 14a-b), and when the at least two joint elements (5a-b, 14a-b) lockably engage the at least one recessed slot (6a-b, 7a-b) in the foot strip (2), the outer end of the first stop element (13a-b, 13al-2, 13M-2) forms a recessed slot. A carrier frame according to any one of claims 5-7, characterised in that the roof profile (12) of the support strip (la-c) on at least the first of the carrier strips (la-c, 2), on at least a first side, extends beyond the outermost stop element (13a-b, 13al-2, 13bl-2) on the first side. A support strip (la-c) arranged to engage a foot strip (2) and jointly form a carrier strip (la-c, 2), where the foot strip comprises at least one reception surface with at least one recessed slot (6a-b, 7a-b) and where the support strip (la-c) comprises at least one roof profile (12), at least two joint elements (5a-b, 14a-b) and at least two stop elements (13a-b, 13al-2, 13M-2), where the at least two joint elements (5a-b, 14a-b) and the at least two stop elements (13a-b, 13al-2, 13bl-2) extend from the roof profile (12), and where the at least two joint elements (5a-b, 14a-b) are arranged to lockably engage the at least one recessed slot (6a-b, 7a-b) in the foot strip (2), and the at least two stop elements (13a-b, 13al-2, 13M-2) then reach the reception surface of the foot strip (2), where further at least a first stop element (13a, 13al-2) is arranged on one side of the at least two joint elements (5a-b, 14a-b) and at least a second stop element (13b, 13b 1-2) is arranged on the other side of the least two joint elements (5a-b, 14a- b), where when the at least two joint elements (5a-b, 14a-b) lockably engage the at least one recessed slot (6a-b, 7a-b) in the foot strip (2), a portion of the reception surface on the foot strip (2) on at least one side of the support strip (la-c) is exposed, characterised in that the support strip is provided with or without at least one wall element (3a-b) where further, for the support strip with at least one wall element (3a-b), at least one wall element (3a-b) extends from the roof profile (12) of the support strip (la-c), where the least one wall element (3a-b) is arranged outside of the outermost stop element (13a-b, 13al-2, 13bl-2) such that it, with the foot strip (2) and the support strip (la-c) locked together, extends along an extension of one side of the foot strip (2). A support strip according to claim 9, characterised in that the joint elements (5a-b, 14a-b), at their outer ends comprise a hook element (5a-b), arranged to lockably engage an extending edge part (6a-b) in the recessed slot (6a-b, 7a-b) in the foot strip (2). A support strip according to claims 9 or 10, characterised in that at least a first of the stop elements (13a-b, 13al-2, 13 -2), at its outer end is bent towards the at least two joint elements (5a-b, 14a-b), and when the at least two joint elements (5a-b, 14a-b) lockably engage the at least one recessed slot (6a-b, 7a-b) in the foot strip (2), the outer end of the first stop element (13a-b, 13al-2, 13bl-2) forms a recessed slot. A support strip according to any one of claims 9-11, characterised in that the roof profile (12) of the support strip (la-c), on at least a first side, extends beyond the outermost stop element (13a-b, 13al-2, 13bl-2) on the first side.

Description:
Carrier strip, carrier frame comprising such carrier strips and a foot strip and a support strip forming such a carrier strip

The present invention relates to a carrier strip, a carrier frame comprising such carrier strips and a foot strip and a support strip forming such a carrier strip according to the introductory portions of the independent claims.

In particular, it relates to such a carrier strip, a carrier frame comprising such carrier strips and a foot strip and a support strip forming such a carrier strip arranged for receiving at least one sheet element.

Background of the invention

Window glass sheets are typically received in a frame made from four frame portions attached to each other. The frame portions and the frame are therefore adapted for glass sheets of a given thickness, and are specifically designed for either single glass windows or double glass windows. In order to mount glass sheets of different thicknesses in such a frame or to change between single glass windows and double glass windows, frames designed from differently designed frame portions are necessary, which increases the cost.

An object of the invention is therefore to provide a carrier strip, a carrier frame comprising such carrier strips and a foot strip and a support strip forming such a carrier strip that may be adapted for varying glass sheet thicknesses.

Another object of the invention is therefore to provide a carrier strip, a carrier frame comprising such carrier strips and a foot strip and a support strip forming such a carrier strip that may be adapted to single glass windows or double glass windows

These and other objects are attained by a carrier strip, a carrier frame comprising such carrier strips and a foot strip and a support strip forming such a carrier strip according to the

characterising portions of the independent claims. Summary of the invention

The invention relates to a carrier strip la-c, 2 comprising a foot strip 2 and a support strip la-c. The foot strip comprises at least one reception surface with at least one recessed slot 6a-b, 7a-b. The support strip la-c comprises at least one roof profile 12, at least two joint elements 5a-b, 14a-b and at least two stop elements 13a-b, 13al-2, 13M-2. The at least two joint elements 5a-b, 14a-b and the at least two stop elements 13a-b, 13al-2, 13b 1 -2 extend from the roof profile 12. The at least two joint elements 5a-b, 14a-b are arranged to lockably engage the at least one recessed slot 6a-b, 7a-b in the foot strip 2. The at least two stop elements 13a-b, 13al-2, 13M-2 then reach the reception surface of the foot strip 2. At least a first stop element 13a, 13al-2 is arranged on one side of the least two joint elements 5a-b, 14a-b and at least a second stop element 13b, 13b 1-2 is arranged on the other side of the at least two joint elements 5a-b, 14a-b. When the at least two joint elements 5a-b, 14a-b lockably engage the at least one recessed slot 6a-b, 7a-b in the foot strip 2, a portion of the reception surface on the foot strip 2 on at least one side of the support strip la-c is exposed. A sheet element may advantageously be attached on the reception surface on the foot strip 2 on at least one side of the support strip la-c which is exposed.

The support strip is provided with or without at least one wall element 3a-b. For the support strip with at least one wall element 3a-b, at least one wall element 3a-b extends from the roof profile 12 of the support strip la-c, where the least one wall element 3a-b is arranged outside of the outermost stop element 13a-b, 13al-2, 13M-2 such that it, with the foot strip 2 and the support strip la-c locked together, extends along an extension of one side of the foot strip 2. In this way, a near unbroken surface is created on the side of the carrier strip la-c, 2 that the wall element 3a- b is facing.

In an advantageous embodiment of the invention, the joint elements 5a-b, 14a-b, comprise a hook element 5a-b at their outer ends, arranged to lockably engage an extending edge part 6a-b in the recessed slot 6a-b, 7a-b in the foot strip 2. Using the hook elements 5a-b, the foot strip 2 and the support strip la-c are advantageously easily and quickly joined.

In a further advantageous embodiment of the invention, at least a first of the stop elements 13a-b, 13al-2, 13M-2 is, at its outer end, bent towards the at least two joint elements 5a-b, 14a-b. When the at least two joint elements 5a-b, 14a-b lockably engage the at least one recessed slot 6a-b, 7a- b in the foot strip 2, the outer end of the first stop element 13a-b, 13al-2, 13M-2 forms a recessed slot. An adhesive may further advantageously be applied in the recessed slot to further attach the foot strip 2 to the support strip la-c.

In yet another advantageous embodiment of the invention, the roof profile 12 of the support strip la-c extends, on at least a first side, beyond the outermost stop element 13a-b, 13al-2, 13 -2 on the first side. A sheet element may advantageously rest against this extending part and be supported by it, but still retain movability.

The invention further relates to a carrier frame for at least one sheet element lOa-b, comprising four such carrier strips 1-2 attached to each other in a rectangular shape.

The invention yet further relates to a support strip 1 a-c arranged to engage a foot strip 2 and jointly form such a carrier strip la-c, 2.

Brief description of the drawings

Fig. 1 shows a first embodiment of a carrier strip according to the invention with a separate foot part and a first embodiment of a separate support element

Fig. 2 shows the first embodiment of the carrier strip with the foot part and the support element joined

Fig. 3 shows the first embodiment of the carrier strip with a distance plate

Fig. 4 shows the first embodiment of the carrier strip with the distance plate and elastic adhesive applied

Fig. 5 shows the first embodiment of the carrier strip with two glass sheets mounted onto it

Fig. 6 shows a second embodiment of a carrier strip according to the invention with a foot part and a second embodiment of a support element lb separated from each other.

Fig. 7 shows the second embodiment of the support element in a second version Fig. 8 shows a third embodiment of the support element in a first version Fig. 9 shows the third embodiment of the support element in a second version Fig. 10 shows the third embodiment of the support element in a third version Description of preferred embodiments

The invention relates to a carrier strip 1 a-c, 2 intended to carry two sheet elements, typically two glass sheets, which form a double glass window. The carrier strips surround rectangular glass sheets on four sides and forms a closed frame. The figures only illustrate selected portions of the carrier strips and the glass sheets.

Both the foot part and the various embodiments of the support elements are designed as profiles, that is elongated elements with the same cross sectional shape along their full length. The figures illustrate all details as seen from the short sides of the strips, so that the shapes of the cross sections are clarified. The figures illustrate the foot parts and the support elements oriented to for receiving glass sheet from above and all references to directions refer to what would be the case with the foot parts and the support elements oriented in this fashion.

Fig. 1 shows a first embodiment of a carrier strip according to the invention with a foot part 2 and a first embodiment of a support element la, separated from each other. The support element may be modified as an adaptation to various applications, as described in connection with figs. 6- 10. After modification the support element la is attached to the foot part 2 in the fashion illustrated in conjunction with figs. 2-6, but in this figure the foot part 2 and the support element la have not yet been joined.

The foot part 2 has a rectangular outer cross section with a larger height than width. On the short sides of the cross section of the foot part, that in the figure faces upwards and downwards, respectively, recesses extending lengthwise are provided. Within the, in a cross section, rectangular foot part u-shaped portions 7a-b are provided around the recesses. From the ends of the legs of the u-shaped portions, the periphery of the foot part extends some distance in between the legs and forms lips 6a-b that may receive portions of the support element la. The support element la comprises a plane roof profile 12 from which the remaining elements extend downwards, so the upper surface of the roof profile constitutes a plane rectangle. Stop elements 13a-b extend downwards from the underside of the roof profile 12 near the outer edges of the roof profile 12. The stop elements 13a-b are thus arranged some distance from the outer edges of the roof profile. The stop elements have a longer portion extending straight down from the underside of the roof profile 12, they then turn a right angle from the longer portions of the stop elements a short distance towards the centre of the roof profile and then turn a right angle a short distance downwards, that is in the same direction as the longer portions of the stop elements. When the support element is joins the foot part, it is obviously the stop element that limits how close to the foot part the support elements may move.

Between the stop elements 13a-b a pair of joint elements 14a-b are provided, that extend downwards from the underside of the roof profile 12. The joint elements are at their outer ends provided with hook shaped elements 5a-b, arranged at the side of respective joint element that face away from the other joint element, so they are thus arranged on the outer sides of the pair of joint elements 14a-b. The hook shaped elements 5a-b are v-shaped with the pointy end facing downwards and their upper ends steeply angles towards the outer sides of the joint elements 14a- b. The hook shaped elements 5a-b are arranged at the ends of the joint elements, that is furthest from the roof profile.

Fig. 2 shows the first embodiment of the carrier strip with the foot part and the support element joined. The joint elements 14a-b have here been inserted into the upper recess in the foot part and the hook shaped elements 5a-b have been pushed beyond the lips 6a-b in the recess in the foot part. The hook shaped elements 5a-b are now grasping the lips 6a-b and locks the foot part 2 to the support element la.

If it had not been for the stop elements 13a-b, the joint elements 14a-b could have been inserted further into the recess, but the length of the stop elements 13a-b is selected such that the hook shaped elements 5a-b just reach grasping the lips 6a-b when the stop elements 13a-b reach the upper surface of the foot part.

The stop elements 13a-b do not extend straight down to the upper surface of the foot part, but the angled portions of the outer ends of the stop elements, farthest from the roof profile, leave a recess into which an element may be inserted. The function of this recess is described in conjunction with the proceeding figure.

Fig. 3 shows the first embodiment of the carrier strip 1-2 with a distance plate 4 inserted into the recess formed by the angled portions of the outer ends of the stop elements. The distance plate is used during mounting of a sheet element onto the carrier strip, as the sheet element should not rest directly against the carrier strip, but there should be a gap with elastic filler.

The distance plate 4 has a thickness that makes it fit snugly into the recess and it further comprises and outer portion angled away from the remainder of the distance plate, intended to facilitate grasping when it is to be removed with the weight of the sheet element resting on it.

Fig. 4 shows the first embodiment of the carrier strip with the distance plate 4 and with elastic adhesive 9a-b applied to the portions of the upper surface of the foot part that is exposed by the support element 1 a. Typically, the elastic adhesive 9a-b is silicone. The silicone is inserted into the recess formed by the angled portions of the outer ends of the stop elements, and it is applied with an equal thickness onto the remaining portions of the upper surface of the foot part that is exposed by the support element la and the distance plate 4.

Fig. 5 shows the first embodiment of the carrier strip with two glass sheets 1 Oa-b mounted onto it. The glass sheets rest with one side on the distance plate 4 and reach the silicone. Typically, somewhat more silicone is applied than what is absolutely necessary for the glass sheets to just reach it, such that a fully air tight seal is formed. The silicone may then be left to cure while the glass sheets rest on the distance plate 4. The distance plate 4 may thereafter be removed and silicone supplied into the space that is left, but if the distance plate 4 is made from a substance that gives an air tight seal, it may be left in place. It should then preferably be designed as an element that does not protrude beyond the glass sheet.

Fig. 6 shows a second embodiment of a carrier strip according to the invention with a foot part and a second embodiment of a support element lb separated from each other. The two parts are obviously intended to the joined in a fashion corresponding to that for the first embodiment of the carrier strip. While the foot part in the second embodiment is identical to that in the first embodiment, the second embodiment of the support element lb is different from that in the first embodiment. The support element lb in the second embodiment does in the same way as in the first embodiment comprise a roof profile 12 from which a pair of joint elements 14a-b and a pair of stop elements 13a-b extend, designed in fashion identical to that of the first embodiment. To this is added a pair of wall elements 3a-b, that extend straight down from the lower side of the roof profile 12. With the wall elements 3a-b, the support element lb forms an element with the same width as the foot part.

Between each stop element 13a-b and respective adjacent wall elements 3a-b, nicks extend along the full length of the roof profile. It is thus easy to break off a wall element 3a-b, revealing a portion of the upper side of the foot part in order to receive a glass sheet there. One could in a corresponding fashion instead break off a wall element 3a-b on the opposite side, revealing a portion of the upper side of the foot part in order to receive a glass sheet on that side, or alternatively both wall elements 3a-b may be broken off in order to receive glass sheets on both sides.

Fig. 7 shows the second embodiment of the support element in a second version, where what in the figure is the right wall element 3b, has been broken off in order to receive a glass sheet on the right side of the carrier strip. The nick is provided on the roof profile some distance from the stop element 13b, such that the remainder of the roof profile extends outwards from the stop element 13b. The glass sheet then only rests passively against the portion of the roof profile that extends outwards from the stop element 13b, and is attached to the carrier strip with silicone, which allows for movement of the glass sheet.

Fig. 8 shows a third embodiment of the support element lc in a first version, where no portions of the support element lc have been broken off. The third embodiment of the support element lc does, in the same fashion as the second embodiment of the support element lc, comprise a roof profile 12 from which a pair of joint elements 14a-b and a pair of stop elements 13a-b extend downwards from the lower side of the roof profile 12. Contrary to the second embodiment, the third embodiment of the support element lc comprises two pairs of stop elements 13al-2, 13M- 2, one pair on one side of the joint elements 14a-b and the other pair on the other side of the joint elements 14a-b. The angled portions of the stop elements 13al-2, 13b 1-2 are, on both sides of the joint elements, directed towards the joint elements 14a-b. The roof profile 12 is wider than in the second embodiment, in order to leave space for the extra pair of stop elements 13al-2, 13bl- 2, and the support element lc is obviously intended to be joined with a foot part of the same width, the roof profile 12, the joint elements 14a-b and the stop elements 13al-2, 13M-2 are otherwise embodied identically to corresponding elements in the second embodiment.

Between each stop element 13a2, 13b2 and respective adjacent wall elements 3a-b, outer nicks extend along the full length of the roof profile. It is thus easy to break off a wall element 3a-b, revealing a portion of the upper side of the foot part in order to receive a glass sheet there. One could in a corresponding fashion instead break off a wall element 3a-b on the opposite side, revealing a portion of the upper side of the foot part in order to receive a glass sheet on that side, or alternatively both wall elements 3a-b may be broken off in order to receive glass sheets on both sides.

Between the inner and the outer stop elements 13al-2, 13 -2, nicks extend along the full length of the roof profile. It is thus easy to break off an outer stop elements 13al-2, 13bl-2a and an adjacent wall element 3a-b, revealing a portion of the upper side of the foot part in order to receive a thicker glass sheet there. One could in a corresponding fashion instead break off a wall element 3a-b on the opposite side, revealing a portion of the upper side of the foot part in order to receive a thicker glass sheet on that side, or alternatively both wall elements 3a-b may be broken off in order to receive thicker glass sheets on both sides.

Fig. 9 shows the third embodiment of the support element in a second version, where what in the figure is the right wall element 3b, has been broken off in order to receive a glass sheet on the right side of the carrier strip. The nick is provided on the roof profile some distance from the right outer stop element 13b2, such that the remainder of the roof profile extends outwards from the right outer stop element 13b2. The glass sheet then only rests passively against the portion of the roof profile that extends outwards from the right outer stop element 13b2, and is attached to the carrier strip with silicone, which allows for movement of the glass sheet.

Fig. 10 shows the third embodiment of the support element in a third version, where what in the figure is the right wall element 3b and the right outer stop element 13b2, have been broken off in order to receive a thicker glass sheet on the right side of the carrier strip. The nick is provided on the roof profile some distance from the right inner stop element 13bl, such that the remainder of the roof profile extends outwards from the right inner stop element 13bl . The glass sheet does in a corresponding fashion rest against the portion of the roof profile that extends outwards from the right inner stop element 13bl .

The invention relates to a carrier strip 1 -2 intended to carry to two sheets, typically two glass sheets, which form a double glass window, but obviously the sheets may be constituted by other types of transparent or intransparent sheets. The carrier strip is arranged to be suited for receiving only one sheet element on one side, or two sheet elements, one on each side.

In the presented embodiments, the support element is attached to the foot part with a snap-in attachment, but obviously the snap-in attachment may be replaced by other types of attachments.

In the presented embodiments, the support element is provided with nicks which obviously give a set of choices when assembling the carrier strips, but the nicks may of course be eliminated. Instead, several differently shaped support elements may be joined with the foot part. Further, the foot part may be available in several different designs.