GB2285084A - Beading - Google Patents

Abstract

A beading (10) comprising a generally planar elongate strip which has two parts (12 and 14). These parts are joined to one another by a hinge portion (16) which extends longitudinally along the strip such that the strip can be coiled before use when in a flat condition, either by virtue of the two parts (12 and 14) being generally co-planar or by virtue of the two parts (12 and 14) being flat against one another, and subsequently uncoiled and folded or opened out at the hinge portion (16) to create an angled beading. The beading is made from PVC extrusion and may be made by co-extruding two materials, the hinge portion (16) being more pliable than the side parts (12, 14). <IMAGE>

Description

Beading The present invention relates to a beading, especially but not exclusively for use in internal plastering and dry lining.

When a wall is plastered problems are often encountered upon tackling wall corners. Often the finish on such a corner greatly detracts from the overall appearance of the wall if it is not straight and uniform in shape. Previously in order to overcome these problems galvanised wire mesh corners with a projecting bead, or similar strips made of plastics material, have been nailed on to such corners before the wall has been plastered.

This method has had the desired effect with regard to appearance of the wall. However both varieties of strip are bulky and hard to transport as they comes in long straight sections and the galvanised strip is not very pleasant to handle with its sharp edges. Furthermore in stores selling such strips their display is difficult and they often taken up a considerable portion of floor or wall space.

It is an aim of the present invention to obviate one or more of these problems.

The present invention is directed to a beading comprising a generally planar elongate strip which has two parts, these parts being joined to one another by a hinge portion which extends longitudinally along the strip such that the strip can be coiled before use when in a flat condition, either by virtue of the two parts being generally co-planar or by virtue of the two parts being flat against one another, and subsequently uncoiled and folded or opened out at the hinge portion to create an angled beading.

This construction provides the advantages that in the coiled form a long length of the beading can easily be packed into a plastics bag. The bag can be easily marked and displayed, either by shelving or hanging, without taking up too much valuable space in a store. Also the construction of the beading from plastics material makes is reasonably tough and resistant to knocks and droppage. Furthermore the strip can be continuously extruded and cut to any required length.

Thus, it is no longer necessary, as it has been hitherto, to butt joint two or more pre-cut lengths of angled beading together for a high corner wall, since the required length can be cut from the coil. As a result, there are substantially no discontinuities in the line of the corner as provided by the beading.

Preferably, the strip is made of a plastics material.

In a preferred embodiment both parts immediately adjacent to the hinge portion are curved such that on folding a projection is formed.

Advantageously on one or both sides of the hinge portion there is a projecting member such that when the strip is folded a projection is provided.

Preferably the parts have holes formed in them to facilitate keying of the strip on a wall. This is advantageous because such holes can be cut on extruding the strip before it is coiled.

In a preferred embodiment locking members are provided on opposite sides of the hinge portion respectively, which when the strip is folded lock together producing a rigid shape for the beading. This construction may be advantageous when the condition of the wall corner is such that it has deformities in the longitudinal direction.

Preferably, the strip is a simple extrusion consisting of one material although it may be a co-extrusion of two or more plastics materials. This may enable the hinged portion to be made of a more pliable plastics than the two parts of the strip.

Also different coloured plastics material may be used for decorative effect.

Preferably the plastics material which the beading comprises is unplasticised polyvinylchloride. This is advantageous because UPVC is a rigid high impact material.

Examples of beading made in accordance with present invention are shown in the accompanying drawings, in which: Figure 1 shows a perspective view of such a beading in its flat state; Figure 2 shows a perspective view of the beading shown in Figure 1 in its folded state; Figure 3 shows a cross section of the beading shown in Figure 1; Figure 4 shows an enlarged part of the cross section of Figure 3; Figure 5 shows a cross section of the beading shown in Figure 3 in its folded state; Figure 6 show a cross sectional perspective view of the beading shown in Figure 2 with modified holes cut in it; Figure 7 shows a cross section of a modified form of the beading shown in Figure 1; Figures 8 to 11 show cross sections of respective further modified beadings; Figure 12 shows a cross section of the beading shown in Figure 11 in a flat state;; Figure 13 shows a cross section of a modified beading; Figure 14 shows a perspective view of the beading shown in 1 in a coiled and in an uncoiled folded state; Figure 15 shows a cross section of a beading equipped with interlocking protrusions; Figure 16 shows an enlargement of part of the section shown in Figure 15; Figure 17 shows an enlargement of a modification of the section shown in Figure 16; Figure 18 shows a cross sectional beading shown in Figure 15 in a folded state; Figure 19 shows a cross sectional beading shown in Figure 18 in greater detail; Figure 20 shows a cross section a modified beading; Figure 21 shows a cross sectional beading shown in Figure 20; and Figure 22 shows a cross sectional beading shown in Figure 20 in a folded state, and Figure 23 a perspective view of the beading shown in Figures 20 to 22 coiled.

Figure 1 shows a beading 10 in a flat form. The beading comprises an elongate extruded strip of high impact rigid UPVC.

The strip has two parts 12, 14 which extend in the longitudinal direction. Each is between lmm and 2mm thick, preferably about 1.5mm thick and the overall width of the beading is about 50mm, 75mm, or 100mm for example. The two parts 12, 14 are joined by a relatively thin and therefore bendable hinge portion 16. Thus the hinge portion is about 0.5mm thick. Both parts 12, 14 have a regular series of perpendicular slots 18 cut in them. These slots 18 enable the beading to be keyed on to a wall so that the beading constitutes a self-keying plaster edging.

Figure 2 shows the beading from Figure 1 hinged at the hinge portion 16 such that the two parts 12, 14 extend from the hinge portion at an angle of approximately 90" to one another. This is the state in which the beading would be fitted to a wall. The nature of the material of the beading is such that, once the hinged portion is stressed with the beading in its folded state, the beading is retained in this state.

Figure 3 show a cross section of the beading 10. The two parts 12, 14 are essentially flat. However next to the hinge portion 16 both parts 12, 14 have curved projections 20 and 22 in cross section. Figure 4 shows an enlargement of the area round the hinge portion 16. Both the curved projections 20 and 22 extend downwards, viewing the beading as in Figure 4, from the parts 12 and 14 and then curve back up to their inner edges which are joined by the hinge portion 16. Thus the hinge portion 16 bridges the curved projections 20 and 22. Next to the hinge portion 16 both convex projections 20 and 22 are equipped with abutment surfaces 24 and 26 respectively. These are angularly spaced apart by about 900 when the beading is in its flat condition as shown in Figure 3.

Figure 5 shows the beading in its folded state in which the part 12 has been moved through 900. The abutment surfaces 24 and 26 now abut one another inhibiting further folding of the beading 10.

Figure 6 show the beading 10 of Figure 2 with a regular series of cross-shaped slots 28 cut in the parts 12 and 14.

Figure 7 shows a beading 10 similar to that shown in Figures 1 to 7 in which the two parts 12 and 14 can be further closed until the angle between them in cross section is between 700 and 850, as shown by the position of the part 14 drawn in dotted lines. This is achieved by having the abutment surfaces 24 and 26 angularly spaced apart by between 1100and 950 respectively.

Figure 8 shows a modified beading 10 in which the protrusions 20 and 22 are substantially flat, rather than being curved as in the Figures 1 to 7 embodiment, and curved webs 30 protrude respectively from the protrusions 20 and 22, away from the hinged portion 16. The flat protrusions are angled in a manner corresponding to the abutment surfaces 24 and 26 of the Figures 1 to 7 embodiments, so that when the beading is folded, the protrusions 20 and 22 abut each other, and the two webs 30 provide a rounded corner to protect any plastering.

Figure 9 shows a modified beading 10, in which the both parts 12, 14 are substantially flat all the way to the hinge portion 16, so that the protrusions 20 and 22 are omitted. In addition to the hinged portion 16 on part 12, a projection 34 extends from the inner edge of that part. The projection 34 has a cap 36 at its end further from the part 12, considering it in cross section as in Figure 9. The projection 34 and the cap 36 thus provide an extended corner projection in this construction.

Figure 10 shows a modification of the beading shown in Figure 9, in which the protrusion 38 extends from the part 12 at a small distance away from the inner edge thereof. The protrusion 38 is of substantially U-shape cross section, and the parts 12 and 14 lie flat against one another to enable the beading to be coiled, such that when the parts 12 and 14 are hinged apart along the hinge portion 16, the end 38 of the protrusion 40 acts as an abutment stopping further opening of the beading 10 beyond a given angular spacing between the parts 12 and 14, for example beyond about 70" to 850.

Figure 11 shows a modified beading 10 where the part 12 has V-shaped portion 42 along its inside edge, at the hinge portion 16 joins the V-shaped portion 42 to the inner edge of the part 14. The V-shaped portion is angled slightly outwards from the plane of the part 12. In the Figure 11 embodiment the two parts 12 and 14 are parallel to each other to enable the beading to be coiled, whereas in the Figure 12 embodiment the two parts 12 and 14 are co-planar for this purpose. Both Figures show in dotted lines the position of the part 14 after the beading is opened or folded for use.

Figure 13 shows a modified beading which can be snapped into its folded condition, in which it is retained by the parts which snap together. The two parts 12, 14 are joined by a V-shaped portion 42 similar to that in Figures 11 and 12. The inner edge of the part 12 terminates at a lip 44 which is within the V of the V-shaped portion. The hinge portion 16 extends between the edge of the V-shaped portion 42 further from the part 12, and a position on the part 14 which is spaced a little from the inner edge thereof. A lip 48 on the inner edge of the part 14 forms an acute angle therewith, so that it doubles back on that part.

On the inside of the V-shaped portion close to the hinge portion 16 and opposite the lip 44 there is an abutment 50. As shown by the dotted line position of the part 14, when the beading is folded that part 14 closes with the other part 12 to form the angled beading. The two lips 44 and 48 contact each other and the inner portions of the parts 12 and 14 are resiliently bent until the lip 48 passes under the lip 44. The abutment 50 then resiliently abuts one side of the part 14 close to its inner end forcing its other side into contact with the lip 44 such that the lip 48 locks under the lip 44 and the lips 44 and 48 form a clip or locking mechanism. Thus the two parts 12 and 14 are rigidly locked in position with an angle between them of about 70-85 .

Figure 14 shows the beading 10 shown in Figure 1 in its flat form and in its angled form ready for use. It can be seen form this Figure that the beading can simply be rolled or coiled up when in its flat form for storage before use.

An alternative hinged clip for the beading is shown in Figures 15 to 19. Figure 15 which is analogous to Figure 3 has two lips 52 and 54 on the intended inside edge of the parts 12 and 14 at the outside edges of the curved projections 20 and 22.

The lips 52 and 54 are equipped with projections 56 and 58 respectively. The projection 56 and 58 are on opposite sides of the lips 52, 54. In Figure 15 the projection 56 points inwardly and the projection 58 outwardly. Figure 16 is analogous to Figure 4 and shows the hinge area in greater detail.

Figure 17 shows the same view as Figure 16 but with a modified clip in which the projection 56 on the underside of lip 52 has been removed.

Figure 18 shows the beading after being folded, in which the projections 56 and 58 have been snapped behind each other and hold the beading in a rigid angled shape.

Figure 19 shows a length of strip thus prepared for use, with round holes 60 cut for keying the beading 10.

Figure 20 shows the cross section of a further modified beading 10. The part 12 has on its inside edge a circular extension 60 which is attached to the part 12 by straight side 64 which is inlaid from the outside surface of the circular extension 62.

The circular extension 62 extends through an angle of approximately 2700 round till it is joined to the hinge portion 16 by another inlaid straight side 66. The hinge portion 16 has cut away edges of approximately 450 to provide abutment surfaces on the part 14 and the straight side 66.

Figure 21 shows the beading of Figure 20 opened for use with holes 60 punched in the part 12 and 16 to enable the beading to be keyed.

Figure 22 shows the beading of Figure 20 with the parts 12 and 14 closed parallel to each other for coiling.

Figure 23 shows the beading of Figure 20 in a coiled state.

It will be appreciated that the holes 18, 28 or 60 can be punched out from the parts 12 and 14 as they are exiting an extruding machine. Any pattern of hole could be used.

Claims (12)

Claims:

1. A beading comprising a generally planar elongate strip which has two parts, these parts being joined to one another by a hinge portion which extends longitudilally along the strip such that the strip can be coiled before use when in a flat condition, either by virtue of the two parts being generally co-planar or by virtue of the two parts being flat against one another, and subsequently uncoiled and folded or opened out at the hinge portion to create an angled beading.

2. A beading according to claim 1, in which both parts immediately adjacent to the hinge portion are curved such that on folding a projection is formed.

3. A beading according to claim 1 or claim 2, in which on one or both sides of the hinge portion there is a projecting member such that when the strip is folded a projection is provided.

4. A beading according to any preceding claim, in which both parts immediately adjacent to the hinge portion have holes formed in them to facilitate keying of the strip on a wall.

5. A beading according to any preceding claim, in which locking members are provided on opposite sides of the hinge portion respectively, which when the strip is folded lock together producing a rigid shape for the beading.

6. A beading according to any preceding claim, in which the strip is a simple extrusion consisting of one material.

7. A beading according to any one of claims 1 to 5, in which the strip is a co-extrusion of two or more materials.

8. A beading according to claim 7, in which the hinged portion is made of a more pliable material than the two parts of the strip.

9. A beading according to claim 7 or claim 8, in which different coloured materials are used for decorative effect.

10. A beading according to any preceding claim, in which the strip comprises plastics material.

11. A beading according to claim 10, in which the plastics material which the beading comprises is unplasticised polyvinyl chloride.

12. A beading substantially as described herein with reference to and as illustrated in one or more of the Figures of the accompanying drawings.