Wallfacing strip

Abstract: Mounting element for mounting a frame for a system ceiling on a wall, comprising a strip (1) which is substantially rectangular in cross-section for arranging horizontally against a wall in a manner such that a surface is provided by the side remote from the wall for mounting thereagainst of the frame, wherein an underside of the strip extending between the wall and the frame remains visible, wherein the surface of the side serving as underside of the strip is provided with a paper film layer (2) provided with an adhesive layer and extending in longitudinal direction which covers in longitudinal direction the edge zones (3) of the sides extending transversely of the side serving as underside, and method for manufacturing such a mounting element.

Description: The invention relates to a ceiling assembly comprising a mounting strip which is substantially rectangular in cross-section for arranging horizontally against a wall in a manner such that a surface is provided by the side remote from the wall for mounting thereagainst of a frame for a system ceiling, wherein an underside of the mounting strip extending between the wall and the frame remains visible. Such a mounting strip is known under the name of wallfacing strip, for instance in the form of a pinewood strip of rectangular cross-section having a narrow side of for instance 18 mm and a wide side of for instance 34 mm, wherein one of the narrow sides and edge zones of the wide sides connecting thereto on either side are provided with a paint layer. With the painted narrow side directed downward, this wallfacing strip is arranged at ceiling height with a wide side horizontally against a wall by screwing or nailing so that the other wide side becomes available for fixing thereto, for instance by stapling, of the frame of a system ceiling, wherein the painted narrow side also remains visible after arranging of the ceiling. Applying of the paint layer normally takes place by means of spraying. DE 296 00 531 U discloses an element for a lowered ceiling, especially a fire retarding lowered ceiling, in which an angle section is attached to a wall by means of a wallfacing strip. No further information however is given about this wallfacing strip. GB-A-1 096 166 discloses a wooden section covered with a separate thin-walled strip of synthetic plastics material, at least one longitudinal edge of the plastics strip being inserted into a longitudinal groove in the wooden section, or into a gap between the wooden section and the surface to which it is attached. According to the method described, once after the wooden sections are installed in position, they are to be covered with the thin walled strip. The drawback of the known sprayed wallfacing strip is that a sprayed side begins in the course of time to exhibit unpainted spots at the position of knots in the wood as a result of working of the wood. Another drawback of a sprayed wallfacing strip is the vulnerability thereof, after it has been arranged, to contamination by for instance paint splashes or plaster residues which find their way onto the wallfacing strip for instance during painting of an adjacent door or window frame or during application of plaster on an adjoining wall surface. Because the types of wood used for the wallfacing strip are quite soft, paint splashes and wet plaster residues penetrate easily into the wood and can then no longer be removed. A further drawback of the known sprayed wallfacing strip is that only a smoothly planed surface can be provided with a paint layer by spraying. In practice a strip is usually used which is obtained by sawing in longitudinal direction from a strip of double width. In such a strip the sawing surface is too rough to enable spraying, while the planed side opposite the sawing surface is the so-called waney edge of the wood which often has a natural rounding which makes this side unsuitable as underside of a wallfacing strip. Another drawback of the known wallfacing strip is the comparatively high price of a wallfacing strip sprayed with a light colour, since once-only spraying is not sufficient to apply a light coloured paint on the planed wood in covering manner. The object of the invention is to provide a wallfacing strip of which the visible underside does not display bare spots at the position of knots after a period of time. It is a further object to provide a wallfacing strip of which the visible side is less vulnerable to contaminants. Another object is to provide a wallfacing strip of which a narrow side can be used as visible underside irrespective of the finishing of the surface of this side. These objectives are achieved, and other advantages obtained, with a ceiling assembly as claimed in claim 1 the mounting strip is pre-installed with a film strip covering the surface of the side serving as underside of the mounting strip and in a longitudinal direction parts of the edges of the sides extending transversely of the side serving as underside, the film strip being provided with a coating layer on its side remote from the mounting strip. The side of a wallfacing strip serving as underside which is provided according to the invention with a film strip is insensitive to the working of the wood, is easy to clean of paint splashes or other contaminants, wherein no high and therefore cost-price increasing requirements are made of the smoothness of the surface under the film strip. In such a wallfacing strip the visible underside and a portion of the sides connecting thereto are enclosed so that the visible part of the wallfacing strip will never be impaired by the lack of a covering colour layer, while edges of the film strip, which is per se firmly attached to the surface of the wallfacing strip, are clamped on either side of the wallfacing strip respectively between the wallfacing strip and the wall and between the wallfacing strip and the frame, whereby the chance of damage or detaching of the film strip is virtually precluded. In an embodiment of a wallfacing strip according to the invention the film strip is manufactured from plastic. The film strip is preferably manufactured from paper. A paper film strip has the advantage of being inexpensive, while owing to the compatibility of the physical properties of paper and wood a good and durable adhesion of the layer onto a wallfacing strip is obtained which does not deteriorate due to possible working of the wood. The coating layer is for instance a coating layer in a desired colour or a coating layer suitable for painting together with a ceiling. The film strip can be arranged on the wallfacing strip by glueing. In an advantageous embodiment the film strip to be arranged is provided on its side facing toward the mounting strip with an adhesive layer, which adhesive layer preferably comprises an adhesive on the basis of an acryl. An adhesive layer with an acryl-based adhesive offers the advantage that it brings about an optimal adhesion result when a pressure is applied to the adhesive layer. It is possible herewith to arrange on a wallfacing strip a film strip which is already provided with an adhesive layer, so that a separate glueing and drying operation is not necessary, while exertion of pressure to improve the adhesion likewise improves the quality of the surface of the film strip. The invention will be elucidated hereinbelow on the basis of an embodiment with reference to the drawings. In the drawings: Fig. 1 shows in perspective view an example of part of a wallfacing strip according to the invention, Fig. 2 shows in cross-section a detail of a wall on which a system ceiling is mounted using a wallfacing strip as according to fig. 1, Fig. 3 shows in top view a highly simplified representation of a pressing device for arranging a film strip on a wallfacing strip, and Fig. 4-7 show respective cross-sections through the device of fig. 3. Fig. 1 shows a rectangular wallfacing strip 1 which is provided on its bottom narrow side with a film strip 2, edges 3 of which are folded on both sides over the two wide sides of wallfacing strip 1. Fig. 2 shows wallfacing strip 1 of fig. 1 in a situation after mounting on a wall 4 using a wired nail 5. On the side of wallfacing strip 1 remote from wall 4 an L-profile 7 of a ceiling frame is fixed using a staple 6, in which profile rests a ceiling tile 8. In the shown arrangement the edge zones 3 of film layer 2 on wallfacing strip 1 are clamped between wallfacing strip 2 and respectively wall 4 and L-profile 7. Fig. 3 shows in top view a pressing device 9 for through-feed of a wallfacing strip in longitudinal direction as according to arrow 10, wherein against a narrow side of the wallfacing strip must be arranged a film layer which is wider than this narrow side. The device 9 successively comprises horizontally placed first pressing rollers 11, guides (rollers or slides) 12 and 13 placed at an angle and vertically placed second pressing rollers 14. Fig. 4 shows a cross-section through device 9 of fig. 3 along the line IV-IV, wherein a wallfacing strip 1 and a partially arranged film layer 2 with protruding edges 3 has been drawn in by way of elucidation. Film layer 2, 3 is provided on the side facing the wallfacing strip 1 with an adhesive layer containing an acryl-based glue which is activated under pressure. Wallfacing strip 1 and the film layer 2 arranged against the lower narrow side are guided through pressing rollers 11, wherein said lower side and the film layer are firmly connected. Fig. 5 and 6 show in cross-sections along the respective lines V-V and VI-VI in fig. 3 the pairs of guide rollers 12 and 13 lying at an angle which fold the side edges 3 of film layer 2 toward the side surfaces of wallfacing strip 1, wherein the wallfacing strip is supported by transport rollers 15, 16 respectively. Fig. 7 shows in a cross-section along the line VII-VII of fig. 3 the vertically placed pressing rollers 14, between which the edges 3 of film layer 2 are pressed onto the side surfaces of wallfacing strip 1. It is noted that while reference is made in the above discussed embodiment to a wallfacing strip of rectangular cross-section with narrow and wide sides, the invention is in no way limited thereto and also extends for instance to a ceiling assembly having a wallfacing strip of square cross-section.

Claims: Ceiling assembly comprising a mounting strip (1) which is substantially rectangular in cross-section for arranging horizontally against a wall (4) in a manner such that a surface is provided by the side remote from the wall for mounting thereagainst of a frame (7) for a system ceiling (8), wherein an underside of the mounting strip (1) extending between the wall (4) and the frame (7) remains visible from below the ceiling, characterized in that the mounting strip is pre-installed with a film strip (2) covering the surface of the side serving as underside of the mounting strip (1) and in a longitudinal direction parts of the edges (3) of the sides extending transversely of the side serving as underside, the film strip (2) being provided with a coating layer on its side remote from the mounting strip (1). Ceiling assembly as claimed in claim 1, characterized in that the film strip (2) is manufactured from plastic. Ceiling assembly as claimed in claim 1, characterized in that the film strip (2) is manufactured from paper. Ceiling assembly as claimed in any of the foregoing claims, characterized in that the film strip (2) is provided with an adhesive layer on its side facing toward the mounting strip (1). Ceiling assembly as claimed in claim 4, characterized in that the adhesive layer comprises an adhesive on the basis of an acryl.

Inventors: HENDRIKS FRANCISCUS THEODORUS, HENDRIKS, FRANCISCUS THEODORUS GERARDUS
Applicants: C F J PATENT I B V, C.F.J. PATENT I B.V.
Application year: 1998
Main classification: E04B9
IPC codes: E04F19, E04B9