Double-walled pleated curtain

Abstract: A double-walled curtain of pleated material, wherein at least one fold of pleated material of the one wall is connected by means of two parallel connecting strips (10,11) to one or more folds of the other wall for the forming of a module, whereas the outward facing surfaces of the connecting strips bear co-acting coupling means, said modules being adapted to be extruded, whereby the height and width of the curtain can be determined in a simple manner, due to the tubular and endless length of material.

Description: The invention relates to a double-walled curtain of pleated material, comprising a series of distinct modules wherein at least one fold of pleated material of the one wall is connected to one or more folds of the other wall by means of two parallel connecting strips for forming of a module. Such double-walled curtains, for instance as disclosed in DE-A-2840023, have the advantage that the space between the pleats has an insulating effect against transfer of temperature and sound. The drawback to the known double-walled curtains is that these are relatively complicated to make and that in the case of damage repairs are difficult to carry out. The invention has for its object to obviate the drawbacks mentioned above and provides to this end a double-walled curtain which is distinguished in that the outward facing surfaces of the connecting strips display co-acting coupling means being formed such that the connection is releasable. As a result of the use of the module construction for such curtains the manufacture thereof can be greatly simplified. The modules can in any case be obtained by extrusion. By just coupling the connecting strips to each other there results an assembled double-walled curtain which can not only be embodied in random designs but whereof the height and width can also be determined in a simple manner, since the starting point is a tubular and endless length of material. The connection between the coupling strips is such that it is releasable, so the repair of particular module portions can be easily carried out by removing them from the existing curtain and replacing them with one or more new modules. The releasable connection may be effected by a slide connection or a snap coupling. Above mentioned and other advantages and features of the invention will be elucidated in the figure description below of a number of embodiments. In the drawing: fig. 1 shows a perspective view of a double-walled pleated curtain according to the invention; fig. 2 is a perspective view of a portion of the modules of the curtain according to fig. 1 in a first embodiment; fig. 3 is a perspective view corresponding with fig. 2 of a portion of the module for a double-walled folding curtain according to the invention, which is shown as extruded profile; fig. 4 shows a perspective view corresponding with fig. 2 of a portion of the module according to a third embodiment; fig. 5 shows a perspective view corresponding with fig. 2 of a portion of the module according to a fourth embodiment. Designated in the drawing with the numeral 1 is the double-walled folding curtain which consists of a pleated front side 2 and a pleated rear side 3. The curtain is suspended at the top on a normally fixed upper beam 4 and provided at the bottom with a beam 5 that is up and downwardly movable relative to the beam 4. In the case the beam 4 takes a fixed form it is attached by any suitable fastening means to the upper member of a framework for a window or the like, wherein the lower beam 5 is suspended from guide cords 6. These guide cords are fastened to the beam 5 and are carried through the space between the front and rear wall portions 2, 3 of the curtain 1 up to through-holes 6 in the upper beam 4. Therefrom they are guided away horizontally and via a guide roller 7 made accessible to the user in the form of a loop 8. By pulling down the loop 8 the beam 5 can be pulled up, whereby the pleated material of the front and rear walls 2, 3 of the curtain 1 will fold or stretch more or less in concertina fashion. If the curtain is used for screening off a window, the space between the front and rear wall of the curtain is then suitable for functioning as a barrier against sound and heat transfer. According to the invention the front and rear wall 2, 3 are mutually coupled at regular intervals by connecting strips 10, 11, which will be further elucidated hereinafter with reference to fig. 2-5. The invention is based on the assumption that the front and the rear wall 2 and 3 contain a large number of pleats whereof in each case one or more can be mutually connected by connecting strips 10 and 11 respectively. In fig. 2 can be seen that in each case one pleat 2' is connected to the single pleat 3' by means of the connecting strips 10, 11. According to a further characteristic of the invention the connecting strips 10 and 11 are each embodied with a coupling means 12 and 13 respectively. The coupling means 12 is an edge flange of L-shaped cross section, wherein the flanges 14 point towards one another. The coupling means 13 is a rib likewise of L-shaped cross section, wherein the flange 15 points outward. The configuration and the position of the coupling means 12 and 13 are such that the flanges 14, 15 hook into one another, which is shown at the top in fig. 2. The connection can be realised by sliding the strips 10 in lengthwise direction along the strips 11. It will be apparent that in this manner the height of the curtain can be determined at random by coupling to each other the required number of strips 10 and 11. The curtain is therefore constructed of a module at a time consisting of a fold 2', a fold 3', a connecting strip 10 and a connecting strip 11. It will likewise be apparent that the design pattern of the modules can be made at random so that a curtain 1 assembled from modules can also have any desired pattern. It is further of advantage that the connecting strips 10, 11 can display a determined stiffness which is partly caused by the L-shaped coupling flanges 12, 13, whereby relatively broad curtains can be made without this involving any noticeable sagging. It is finally noted that the material of the pleat 2', 3' can be different from that of the connecting strips 10, 11, wherein the connection between both material types can be effected by glueing or the like, see fig. 2. According to another embodiment as in fig. 3 it is possible to extrude the connecting strips 10, 11 together with the folds 2', 3' of the pleat as a tubular or box-like material. A separate connecting operation between the pleat strips and the connecting strips is thereby avoided. The assembly of a curtain from modules as according to fig. 3 is the same as described with reference to fig. 2. Fig. 4 shows an embodiment wherein not just one fold but three folds of the pleat 2'' and the pleat 3'' are mutually connected by connecting strips 10, 11. The assembly of curtains of great height can be hereby simplified as a result of the modules of greater height. The connection of the strips 10, 11 can take place in random manner, for example as according to the embodiment in fig. 2, but also for instance by means of adhesive strips 20 situated on the outward facing sides of the connecting strips 10, 11. Fig. 5 shows an embodiment wherein a snap coupling is possible between the strips 10, 11. The strip 10 is embodied to this end with standing bosses 21 which display a thickened head. The strip 11 on the other hand is embodied with through-holes 22 which lie in line with the bosses 21. By making star-shaped incisions into the material around the holes 22 a determined flexibility is obtained whereby the thickened head of boss 21 can be carried through the hole 22. With this manner of connection it is not necessary to carry out a sliding movement between the connecting strips 10, 11 to be connected to each other, all that is required is to snap the strips onto each other and subsequently thread through the operating cords 6. Substitution of the modules can be carried out in all cases in a simple manner after the connecting cord 6 has first been removed, following which it can finally be arranged once again with one or more new modules therein. The invention is not limited to the above described embodiment.

Claims: Double-walled curtain of pleated material, comprising a series of distinct modules wherein at least one fold (2') of pleated material of the one wall (2) is connected to one or more folds (3') of the other wall (3) by means of two parallel connecting strips (10, 11) for forming of a module, characterized in that the outward facing surfaces of the connecting strips display co-acting coupling means (12, 13, 20, 21 and 22) being formed such that the connection is releasable. Curtain as claimed in claim 1, characterized in that the one connecting strip (10) has an edge flange (12) of which the flange (14) points inward, while the other connecting strip (11) has an edge flange of which the flange (15) points outward. Curtain as claimed in claim 1, characterized in that the one strip (10) displays outward pointing bosses (21) which can be carried through holes (22) of the other connecting strip (11) for the forming of a releasable snap coupling. Curtain as claimed in claim 1, characterized in that the module is manufactured by means of the extrusion process.

Inventors: SCHOEN SIEGFRIED JOACHIM, SCHOEN, SIEGFRIED JOACHIM, Schön, Siegfried Joachim
Applicants: SCHOEN BV, SCHOEN B.V.
Application year: 1990
Main classification: E06B9
IPC codes: E06B9, A47H23