AU2007100568A4

AU2007100568A4 - Improvements in plasterboard

Info

Publication number: AU2007100568A4
Application number: AU2007100568A
Authority: AU
Inventors: William Clifford Tucker
Original assignee: PROFILES IN PLASTER Pty Ltd
Current assignee: PROFILES IN PLASTER Pty Ltd
Priority date: 2007-06-25
Filing date: 2007-06-25
Publication date: 2007-08-09
Anticipated expiration: 2015-06-25

Description

P/00/012 Regulation 3.2

AUSTRALIA

Patents Act 1990

ORIGINAL

COMPLETE SPECIFICATION INNOVATION PATENT Invention Title: "IMPROVEMENTS IN PLASTERBOARD" The following statement is a full description of this invention, including the best method of performing it known to us: TITLE: IMPROVEMENTS IN PLASTERBOARD ;BACKGROUND OF THE INVENTION 1 1. Field of the Invention (-i THIS INVENTION relates to improvements in plasterboard.

00 IN 5 The invention particularly relates, but is not limited to, the insertion and fixing of building components in slots formed in side and/or end edges of plasterboard sheets.

2. Prior Art AU 199218151A1 (Patent No. 645207) (Profiles in Plaster Pty Ltd) discloses a plasterboard sheet, arranged to be butt-jointed to a similar sheet, with an external depression 2-5mm deep) provided in the front face along one side edge of the sheet.

A router, fitted with a cutting wheel, has a cover and guide which controls the depth and width of a slot or groove cut in the side edge of the plasterboard core, under the paper liner. Glue or adhesive is placed in the slot or groove and the paper liner is depressed to adhere to the plaster core to form the external groove or depression.

The router, and the method for forming the external depression in the plasterboard sheet, as disclosed in AU 199218151 Al (645207), is incorporated into this specification by reference.

SUMMARY OF THE PRESENT INVENTION It is an object of the present invention to provide a method enabling a building component to be inserted into, and fixed within, a slot or groove cut in a side and/or end edge of a plasterboard sheet.

2 It is a preferred object to provide a method where the slot or ;groove is cut in the plasterboard core, under the paper liner.

It is a further preferred object to provide a method where such building component may be employed to secure the plasterboard sheet to a 00 second (similar) sheet, eg., butt-jointed or at right-angles, or to an adjacent _building structure, eg., a stud or rail.

O Other preferred objects of the present invention will become apparent from the following description.

In one aspect, the present invention resides in a method of enabling connection of a building component to a plasterboard sheet including the steps of: cutting a slot or groove in a plaster core, along at least one side edge and/or end edge of the plasterboard sheet, under a paper liner of the plasterboard sheet; applying an adhesive or glue to the plaster core and/or to an underside of the paper liner along the slot or groove; inserting at least one portion of the building component into the slot or groove; and allowing the adhesive or glue to set to secure the at least one portion of the building component in the slot or groove.

A compressive force may be applied to a top side of the paper liner, to depress the paper liner into engagement with the at least one portion of the building component.

Preferably, the slot or groove is cut so that a thin layer of the plaster core remains on the underside of the paper liner, and the thin layer is adhered to the at least one portion of the building component.

Preferably, the slot or groove is cut in the plaster core by a router having a cutting wheel operable to engage the plaster core and guide 00

O

means to control the relative position of the cutting wheel to the plaster core.

O

OIn a second aspect, the present invention resides in a plasterboard sheet having at least one portion of a building component inserted in, and secured thereto, by the method hereinbefore described.

In a third aspect, the present invention resides in two or more building sheets interconnected by one or more building components, where at least one portion of the one or more building components have been inserted in, and secured to, at least one of the building sheets by the method hereinbefore described.

Other aspects of the present invention will become apparent from the following description.

BRIEF DESCRIPTION OF THE DRAWINGS Preferred embodiments will now be described with reference to the accompanying drawings in which: FIG. 1 is an end elevational view of a side edge of the plasterboard sheet after the slot or groove has been cut in accordance with the Prior Art; FIG. 2 is a similar view of the side edge having an external depression provided in the front face in accordance with the Prior Art; FIG. 3 is a similar view of a side edge of the plasterboard sheet after the insertion of a portion of a building component in accordance with Sthe present invention; I FIG. 4 is a similar view showing two similar plasterboard sheets interconnected by the building component in accordance with a first 00oO embodiment of the present invention; SFIG. 5 is a perspective front view of a wall niche; FIG. 6 is a sectional plan view, prior to completion, taken on line 7-7 on FIG. 5; and FIG. 7 is a similar view after completion, in accordance with a second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 illustrate a plasterboard sheet 10, in accordance with the prior art disclosed in AU 199218151 Al (645207) where the plasterboard sheet 10 has a plaster core 11 between front and rear paper liners 12, 13. By using the router described in the prior art document, a groove 14 is cut along the side edge 15 of the sheet 10 and a thin layer, eg., 0.1-1mm of plaster 16 is left on the under side of the front paper liner 12 so that the latter will not be affected by, eg., the water-base of the glue.

In the prior art embodiment shown in FIG. 2, the glue is applied to the core 11 and/or the plaster 16 on the front paper liner 12 and the front paper liner 12 is pressed into contact with the core 11 to form the depression 17 along the side edge of the plasterboard sheet Preferably, the depression is 1-10mm, more preferably 2-5 mm O deep.

SReferring now to the embodiment of the present invention illustrated in FIG. 3, glue is inserted in the slot 14 in the core 11 of the plasterboard sheet 00oO IN 5 One portion 21 of a building component 20, eg., an L-shaped Cbracket with a second portion 22 is inserted in the slot 14 and is secured by the adhesive or glue.

The top side face of the front paper liner 12 may be depressed to force the plaster 16 into contact with the portion 21 of the building component 20 to "clamp" the portion 21 between the opposed faces of the slot 14 formed by the plaster 16 and core As illustrated in FIG. 4, the building component 20 may be used to interconnect two similar plasterboard sheets 10 at right angles at a junction between adjacent walls. In this embodiment, the second portion 22 of the building component 20 is inserted in, and secured to, the slot or groove 14 of the second plasterboard sheet in the manner hereinbefore described.

It will be readily apparent to the skilled addressee that the adjacent plasterboard sheets 10 may be interconnected by a plurality of spaced building components 20; and that the building components 20 may be, eg., planar to provide a strong interconnection between the adjacent plasterboard sheets 10 when butt-jointed together.

It will also be readily apparent to the skilled addressee that the slots or grooves 14 may be provided along the top and/or bottom edges of the plasterboard sheets 10 to enable, eg., fixing of the plasterboard sheets to head or foot rails or noggins.

The provision of the slots or grooves 14 in the side and/or end edges of the plasterboard sheets 10 enables strong, but concealed, fixing of o00 the plasterboard sheets to other building materials.

SReferring now to FIGS. 5 to 7, the present invention is illustrated showing the installation of a wall niche in a plasterboard wall.

The wall niche 40 has side, top and bottom walls 41 of plasterboard 10 with the slot 14 formed therein.

Each slot 14 receives one leg 51 of a setting bead 50 (of substantially L-shape) where the second leg 52 overlies (and may be fixed to) the surrounding wall 60 (of plasterboard construction).

Plaster 70 is applied to the setting bead 50 to "set" the wall niche 50 in position.

The setting bead 50 ensures an accurate finish to the plaster and conceals the joint line between the wall 60 and the wall niche Whilst planar and L-shaped building components 20/setting beads 50 have been described/illustrated, the present invention is applicable to a wide range of alternative configurations, eg., where two planar "leaves" or "legs" have included augers in the range of 00 to 1800.

The anchorage of at least one "leaf' or "leg" in at least one plasterboard sheet 10,41, ensures a higher strength, junction between the adjacent plasterboard/building sheets, whilst still allowing accurate plaster setting.

1 7 c^ Various changes and modifications may be made to the Sembodiments described and illustrated without departing from the present n invention.

00

Claims

1. A method of enabling connection of a building component to a plasterboard sheet including the steps of: cutting a slot or groove in a plaster core, along at least one side 00 edge and/or end edge of the plasterboard sheet, under a paper liner of the Oplasterboard sheet; Sapplying an adhesive or glue to the plaster core and/or to an underside of the paper liner along the slot or groove; inserting at least one portion of the building component into the slot or groove; and allowing the adhesive or glue to set to secure the at least one portion of the building component in the slot or groove.

2. A method as claimed in Claim 1, wherein: a compressive force is applied to a top side of the paper liner to press the paper liner into engagement with at least one portion of the building component.

3. A method as claimed in Claim1 or Claim 2, wherein: the slot or groove is cut so that a thin layer of the plaster core remains on the under side of the paper liner, and the thin layer adhered to the at least one body portion of the building component, the slot or groove being cut in the plaster core by a router having a cutting wheel operable to engage the plaster core and guide means to control the relative position of the cutting wheel to the plaster core.

4. A plasterboard sheet having at least one portion of a building (component inserted in, and secured thereto, by the method as claimed in Sany one of Claims 1 to 3. Two or more building sheets interconnected by one or more building components, with at least one portion of one or more of the building 00 IN 5 components being inserted in, and secured to, at least one of the building O sheets by the method claimed in any one of Claims 1 to 3. DATED this twenty-fifth day of June 2007. PROFILES IN PLASTER PTY LTD By its Patent Attorneys FISHER ADAMS KELLY