WO2008119795A1

WO2008119795A1 - A rendering guide

Info

Publication number: WO2008119795A1
Application number: PCT/EP2008/053849
Authority: WO
Inventors: Vivian Gallogly
Original assignee: Vivian Gallogly
Priority date: 2007-03-30
Filing date: 2008-03-31
Publication date: 2008-10-09
Also published as: GB0919124D0; IE20080242A1; GB2470242A; IES20070228A2

Abstract

A rendering guide has a channel shaped body with a flat inner wall-engaging panel (42) having a pair of outwardly extending side panels (43, 44) which extend outwardly at an angle of about 135° relative to a front face of the wall-engaging panel. A number of plaster keying flaps 46 are pressed out of the material on each side panel. The guide may further comprise two overlapping parts (63, 64), each part having an inner panel (65, 66) and one of said outwardly extending side panels (43, 44), the inner panels overlapping in use to form the inner wall-engaging panel (62), complementary interengagable formations (67, 68) being provided on the inner panels such that interengagement of the inner panels maintains the outer side edges (47) of the side panels in substantially parallel alignment.

Description

"A rendering guide"

BACKGROUND OF THE INVENTION

This invention relates to the rendering of a band of plaster on a wall at a window surround or the like.

Typically the procedure for forming a band of plaster on a wall around a window takes two stages. Laths are temporarily fixed to the wall to guide plastering the inside reveal then the following day when the plaster is dry the laths are removed and either these or other laths are repositioned and fixed to the wall for plastering the outer reveal. It will be appreciated that this two-stage process is relatively time consuming and expensive.

The present invention is directed towards overcoming this problem.

SUMMARY OF THE INVENTION

According to the invention there is provided a rendering guide, including a channel- shaped body having an inner wall-engaging panel with a pair of outwardly extending side panels, said side panels extending outwardly at an obtuse angle relative to an outer or front face of the wall-engaging panel. Advantageously the rendering guide of the invention can be affixed to the wall at a window surround to define edges of a band of plaster which is to be rendered at the window surround.

In one embodiment of the invention an outer tip portion of each side panel is of a different material to the remainder of the body. Alternatively, an outer skin or sheath covers the outer tip portion of each side panel. This conveniently enables the use of relatively cheap and/or lower grade material for the body generally, whilst using a relatively high grade material at the tip portion for greater stability in use for example and to facilitate cheaper manufacture.

It is envisaged that the tip portion could be of translucent material. Alternatively, the tip portion could be provided in different colours to match the plaster to be used to form the band of plaster.

In another embodiment a plane passing through outer ends of the side panels is substantially parallel to the inner wall-engaging panel.

In another embodiment each side panel has a flanged outer end.

The body may conveniently be formed by co-extrusion of the selected materials for the body and the outer tip portions. Any suitable plastics materials may be used.

In one embodiment of the invention plaster keying elements are provided on the side panels.

In another embodiment said plaster keying elements comprise a number of spaced- apart flaps on the side panels, each flap projecting outwardly from a face of the side panel. Preferably each flap is oriented on the side panel such that it forms a substantially horizontal plaster support in use. Advantageously this will help stop plaster from sliding downwardly when being applied.

In a preferred embodiment each flap is integrally formed with the side panel, being pressed out of the side panel to project outwardly from a face of the side panel. In another embodiment one or more reinforcing elements are formed in the wall- engaging panel.

In a further embodiment the reinforcing elements comprise one or more ribs extending between opposite ends of the wall-engaging panel. Preferably a pair of spaced-apart ribs are provided.

In another embodiment the obtuse angle between the wall-engaging panel and each side panel is in the order of 120° to 150° and most preferably is about 135° - 137°.

In a further embodiment a corrosion resistant edging member is mounted along an outer free edge of each side panel. Conveniently said edging member is of plastics material and has a slot for reception of the outer edge of a side panel. In another embodiment a number of spaced-apart through holes are provided in the wall-engaging panel for reception of fasteners to affix the rendering guide to a wall or the like support surface.

In a preferred embodiment outer edges of the side panels are substantially parallel.

In another embodiment outer edges of the side panels are substantially equidistant from the inner wall-engaging panel.

Conveniently openings may be provided in the panels to save material and also in respect of the side panels to aid in keying to the plaster.

It is envisaged that the body of the rendering guide could in fact be of largely open construction such as mesh for example, or possibly simply a number of spaced-apart cross members extending between inner edges of the side panels to support the side panels the desired distance apart and angled relative to the front face of the wall when affixed to the wall. In this regard the invention may provide a rendering guide comprising a pair of spaced-apart side panels interconnected by a wall mounting member which supports the side panels in an angled orientation, the included angle between side panels being in the order of 80°-100° and preferably about 90°.

In another embodiment the lengths by which each side panels extends outwardly from the inner wall-engaging panel are different and the obtuse angles between each side panel and the inner wall-engaging panel are different and a plane passing through outer ends of the side panels is substantially parallel to the inner wall- engaging panel.

In another embodiment the rendering guide comprises two overlapping parts, each part having an inner panel and one of said outwardly extending side panels, the inner panels overlapping in use to form the inner wall-engaging panel, complementary interengagable formations being provided on the inner panels such that interengagement of the inner panels maintains the outer side edges of the side panels in substantially parallel alignment. In another embodiment said complementary interengagable formations comprise at least one outwardly extending longitudinal ridge and associated receiver channel on each inner panel. Conveniently a number of spaced-apart ridges and receiver channels may be provided on one or both parts to allow width adjustment of the rendering guide.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be more clearly understood by the following description of an embodiment thereof, given by way of example only, with reference to the accompanying drawings, in which;

Fig. 1 is a perspective view of a rendering guide according to the invention;

Fig. 2 is a plan view of the rendering guide;

Fig. 3 is a sectional plan view showing the rendering guide in use mounted at a window surround;

Fig. 4 is a detail view of an edge portion of the guide;

Fig. 5 is an elevational view of another rendering guide;

Fig. 6 is a plan view of the rendering guide shown in Fig. 5;

Fig. 7 is an elevational view similar to Fig. 5 of another rendering guide; and

Fig. 8 is a perspective view of another rendering guide.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Referring to the drawings, and initially to Figs. 1 to 4 thereof, there is illustrated a rendering guide according to the invention indicated generally by the reference numeral 1. The rendering guide 1 has a channel shaped body with a generally flat inner wall-engaging panel 2 having a pair of outwardly extending side panels 3, 4 extending outwardly at an obtuse angle relative to a front face 5 of the wall-engaging panel 2.

The wall-engaging panel 2 has a pair of spaced-apart longitudinal reinforcing ribs 6 extending between opposite ends of the wall-engaging panel 2. A number of spaced- apart through holes 8 are provided in the wall-engaging panel 2 for reception of nails 9 (Fig. 3) to secure the rendering guide 1 on a wall 10 surrounding an ope 11 within which a window 12 is mounted on a window frame 13.

A number of plaster keying flaps 15 are spaced-apart along each side panel 3, 4, being pressed out of the material of the side panel leaving an opening 16 in the side panel 3, 4.

In the drawings the flaps 15 are shown projecting to a rear of the side panels 3, 4. Some flaps 15 could be arranged to project forwardly of the side panels 3, 4 if desired.

These flaps 15 in use will be substantially horizontal, or possibly angled upwardly somewhat to stabilise the plaster in the return of the band and stop plaster from sliding downwardly when the wall is being plastered to form the band around a window or the like.

The included angle A (Fig. 1 ) between each panel 3, 4 and the front face 5 of the wall-engaging panel 2 is about 135°.

Outer edges 21 of the side panels 3, 4 are substantially parallel and equidistant from the inner panel 2. A plastic edging strip 20 is mounted along the outer edge 21 of each side panel 3, 4, the outer edge 21 engaging within a complementary slit 22 in the edging strip 20. This conveniently prevents rust at the outer edge which would stain the concrete band.

Typically the rendering guide could be made of galvanised steel, a powder coated steel, or other metal. Other materials such as plastics material could also be used. In use, rendering guides 1 are fitted around side and top edges of the ope 11 in a wall 10 within which the window 12 is mounted. An outer edge 25, 26 of the wall- engaging panel 2 is aligned with an edge of the ope 11. Plaster 30 is then built up in the reveal between the innermost side panel 3, 4 extending inwardly into the ope 11 and window frame 13 as shown on the left hand side in Fig. 3. Additional plaster 31 is filled in between the side panels 3, 4 and plaster 32 is filled in between the outermost side panel 3, 4 and the face of the wall 10.

It will be appreciated that by fitting the rendering guide elements 1 around the window opening 11 a full plaster band can be formed on two faces of the wall in a single stage to a high degree of accuracy. The rendering guide 1 also provides support for the plaster.

The rendering guide can be provided in any suitable width to form a plaster band of desired width at the window surround. For example the width of the wall-engaging panel 2 might be in the order of 80mm and the width of each side panel 3, 4 could be in the order of 20mm. Various other dimensions are possible as required. The rendering guide may be any desired length.

Referring now to Figs. 5 and 6 there is shown another rendering guide according to a second embodiment of the invention indicated generally by the reference numeral 40. The rendering guide 40 has a channel shaped body with a generally flat inner wall- engaging panel 42 having a pair of outwardly extending side panels 43, 44 extending outwardly at an obtuse angle relative to a front face 45 of the wall-engaging panel 42. In this case the included angle B between each side panel 43, 44 and the front face 45 of the wall-engaging panel 42 is about 137°.

A number of openings 46 extend through the wall-engaging panel 42 and side panels 43, 44 for keying with cement in a plaster band formed using the guide 40. Each side panel 43, 44 has a flanged outer end 47.

The rendering guide 40 is formed of plastics material. It will be noted that an outer tip portion 48 of each side panel 43, 44 may be of a different material to the remainder of the guide body. The outer tip portion 48 is generally T-shaped having an inner portion 49 with the flange 47 at an outer end thereof and substantially perpendicular to the inner portion 49. The outer tip portion 48 may be of any suitable length and comprises for example 15-20% of the length of the side panel 43, 44.

In this case also the flanged outer ends 47 of the side panels 43, 44 are substantially parallel and equidistant from the wall-engaging panel 42. A plane passing through the outer ends 47 is parallel to the inner wall-engaging panel 42.

Typically the body generally can be formed of a relatively cheap or low grade plastics material such as PVC for example whilst the outer tip portions 48 will be of a higher grade material which will for example provide greater UV stability in use. Also the outer tip portions 48 may be coloured differently to the remainder of the body to match with the plaster being used to form the band of plaster. This higher grade material will also be colour stable. The outer tip portions 48 could alternatively be made of translucent material.

It is also envisaged that instead of the outer tip portions 48 being fully formed of the higher grade material, instead an outer skin or sheath of the higher grade stable material may be applied to the outer end of each side panel 43, 44.

Any suitable high grade polymer may be used for the outer tip portions 48 of the side panels 43, 44 to provide the necessary stability and colour.

It is also envisaged that it may be possible to paint the outer tip portions 48 of each side panel 43, 44 to achieve the necessary stability and colour.

Fig. 7 shows another rendering guide indicated generally by the reference numeral 50. Parts similar to those described previously are assigned the same reference numerals. In this case, side panels 43, 44 of different length L1 and L2 are provided and the obtuse angles C, D between each side panel 43, 44 and the inner wall- engaging panel 42 are different. However, a plane X passing through outer ends 47 of each side panel 43, 44 is parallel to the inner wall-engaging panel 42. This arrangement would facilitate making one plaster band thicker than the other. Referring now to Fig. 8 there is shown a rendering guide according to a further embodiment of the invention indicated generally by the reference numeral 60. Parts similar to those described previously are assigned the same reference numerals. In this case, the rendering guide 60 comprises two overlapping parts namely first part 63 and second part 64. Each part 63, 64 has an inner panel 65, 66 and one of the outwardly extending side panels 43, 44. The inner panels 65, 66 overlap in use to form an inner wall-engaging panel 62. Complementary interengagable formations 67, 68 are provided on the inner panels 65, 66 such that interengagement of the inner panels 65, 66 maintains the outer side edges 47 of the side panels 43, 44 in substantially parallel alignment. In this case the complementary interengagable formations 67, 68 are formed by a longitudinal ridge 69 of V-section and an associated receiver channel 70 on each inner panel 65, 66. The inner panels 65, 66 overlap with the formations 67, 68 nesting together for use to form a composite rendering guide 60 as shown in the drawing.

It will be appreciated that a number of spaced-apart longitudinal ridges may be provided to facilitate width adjustment of the rendering guide 60. Various other interengagable formations could also be used instead of the V-shaped ridges shown in the drawing which facilitate parallel alignment of the outer edges 47 of the side panels 43, 44 while allowing width adjustment.

The invention is not limited to the embodiments hereinbefore described which may be varied in both construction and detail within the scope of the appended claims.

Claims

1. A rendering guide (1, 40), including a channel-shaped body having an inner wall-engaging panel (2, 42) with a pair of outwardly extending side panels (3, 4, 43, 44), said side panels (3,4, 43, 44) extending outwardly at an obtuse angle (A, B) relative to an outer or front face (5, 45) of the wall-engaging panel (2, 42).

2. A rendering guide (1, 40) as claimed in claim 1 wherein outer edges (21, 47) of the side panels (3, 4, 43, 44) are substantially parallel.

3. A rendering guide (1, 40) as claimed in claim 1 or claim 2 wherein outer edges (21 , 47) of the side panels (3, 4, 43, 44) are substantially equidistant from the inner wall-engaging panel (2, 42).

4. A rendering guide (1, 40) as claimed in any preceding claim wherein a plane passing through outer ends (21, 47) of the side panels (3, 4, 43, 44) is substantially parallel to the inner wall-engaging panel (2, 42).

5. A rendering guide (1, 40) as claimed in any preceding claim wherein the obtuse angle (A, B) between the wall-engaging panel (2, 42) and each side panel (3, 4, 43, 44) is in the range 120° to 150°.

6. A rendering guide (1, 40) as claimed in claim 5 wherein the obtuse angle (A, B) is in the range 135° to 137°.

7. A rendering guide (40) as claimed in any preceding claim wherein an outer tip portion (48) of each side panel (43, 44) is formed from a different material to the remainder of the guide body.

8. A rendering guide (40) as claimed in any of claims 1 to 6 wherein a protective outer skin or sheath covers an outer tip portion (48) of each side panel (43, 44).

9. A rendering guide (1) as claimed in any of claims 1 to 6 wherein a corrosion resistant edging member (20) is mounted along an outer free edge (21 ) of each side panel (3, 4), said edging member (20) having a slot (22) for reception of the outer edge (21 ) of the side panel (3, 4).

10. A rendering guide (40) as claimed in any preceding claim wherein each side panel (43, 44) has a flanged outer end (47).

11. A rendering guide (50) as claimed in any preceding claim wherein the lengths by which each side panel (43, 44) extends outwardly from the inner wall- engaging panel (42) are different and the obtuse angles (C, D) between each side panel (43, 44) and the inner wall-engaging panel (42) are different and a plane (X) passing through outer ends (47) of the side panels (43, 44) is substantially parallel to the inner wall-engaging panel 42.

12. A rendering guide (1) as claimed in any preceding claim wherein plaster keying elements (15) are provided on the side panels (3, 4).

13. A rendering guide (1) as claimed in claim 12 wherein said plaster keying elements comprise a number of spaced-apart flaps (15) on the side panels (3,

4), each flap (15) projecting outwardly from a face of the side panel (3, 4).

14. A rendering guide (1) as claimed in claim 12 or 13 wherein each flap (15) is oriented on the side panel (3, 4) such that it forms a substantially horizontal plaster support in use.

15. A rendering guide (1) as claimed in claim 13 or 14 wherein each flap (15) is integrally formed with the side panel (3, 4), being pressed out of the side panel (3, 4) to project outwardly from a face of the side panel (3, 4).

16. A rendering guide (1 ) as claimed in any preceding claim wherein one or more reinforcing elements (6) are formed in the wall-engaging panel (2).

17. A rendering guide (1) as claimed in claim 16 wherein the reinforcing elements comprise one or more ribs (6) extending between opposite ends of the wall- engaging panel (2).

18. A rendering guide (1) as claimed in any preceding claim wherein a number of spaced-apart through-holes (8) are provided in the wall-engaging panel (2) for reception of fasteners.

19. A rendering guide (60) as claimed in claim 1 wherein the guide (60) comprises two overlapping parts (63, 64), each part (63, 64) having an inner panel (65, 66) and one of said outwardly extending side panels (43, 44), the inner panels (65, 66) overlapping in use to form the inner wall-engaging panel (62), complementary interengagable formations (67, 68) being provided on the inner panels (65, 66) such that interengagement of the inner panels (65, 66) maintains the outer side edges (47) of the side panels (43, 44) in substantially parallel alignment.

20. A rendering guide (60) as claimed in claim 19 wherein said complementary interengagable formations (67, 68) comprise at least one outwardly extending longitudinal ridge (69) and associated receiver channel (70) on each inner panel (65, 66).