AU626337B2

AU626337B2 - A window or door screen to prevent insect entry

Info

Publication number: AU626337B2
Application number: AU43754/89A
Authority: AU
Inventors: Adolphe Harold Alexander
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-10-26
Filing date: 1989-10-26
Publication date: 1992-07-30
Anticipated expiration: 2009-10-26
Also published as: AU4375489A; NZ226719A

Description

626337 COMMONWEALTH OF AUSTRALIA PATENTS ACT 1952 CONIWLETE SPECIFICAION NAME ADDRESS OF APPLICANT: 3 0 'Lrtinsl-J~Atress DPVi~ Chutdi-Bay- Lytteiten-r-E'A;- Nv-vZeakwnd 4 Hc,) Pr~vY. 4C kw A C.L'f, C I o NAME(S) OFINVEN'h. Adolphe Hai-old ALEANDER ADDRESS FOR SERVICE: DAVIES COLLISON Patent Attorneys I Little Collins Street, Melbourne, 3000.

COMIPL'TE SPECIFICATION FOR Th'-E INVENTION ENTITLED: (A cv- C\Coy- a,_re S~rPee n 'B.i P4a1 9aI Ir a W* _'41-4 HOWE-28H 5 to prevent insect entry The following statement is a full lescriptionx of this invention, including the best method of performing it known to me/us: -2- *o 9 The invention relates to a window or door screen of the type which restricts the entry of insects and the like.

o0 At present a number of different constructions of ;25 screen, which are normally called fly or insect screens, are available and there are only two constructions which are readily available. The first is a full size window/door screen mounted in or on a rigid frame e.g. an 4 aluminium or wooden frame which screen is mounted inside or outside an existing window or door.

According toe ebroadest aspect of the invention there is provided a window or door screen, the screen comprising a flexible laminated plastics screen frame with a mesh insert, the laminated plastics screen frame being formed from lengths of a non-magnetic plastics strip and a plastics magnetic seal between which is sandwiched the mesh insert, the screen I.

920114,gjndaLO5043754.res,2 rpa. -3frame being supported by a non-magnetic keeper mounted on at least an upper part of a door or window frame, the keeper being a plastics or aluminium extrusion in which the plastics screen frame is engaged to support the screen in position with at least an upper part of the periphery of the frame in contact with the door or window frame, the remaining periphery of the screen frame being held magnetically in its closed portion by a ferrous or magnetic fastening means fixed to the door or window frame while being readily releasable to allow access through the door or window.

In accordance with a second aspect of the invention there is provided a window or door screen according to the 920501,wpftdisk75,43754.spe,3 invention wherein the frame has on opposite sides or top and bottom thereof hinge means so that the portion thereof held to the door or window frame by the plastics magnetic locking seal is hingeable to allow it to be readily opened, the remainder of the frame being held to the door or window frame by the keeper.

Further aspects of the invention which should be considered in all its novel aspects will become apparent in the following description which is giveni th example only.

Examples of the invention will now be described with reference to the accompanying drawings in which: s, 0 Figure i: shows a perspective view from the side of a first o0 example of window or door screen according to the present invention; onQ* Figure 2: shows a front elevation of an example of the invention adapted for use as a door screen; Figure 3: shows a side elevational view of the door screen shown in Figure 2; Figure 4: shows a front elevation of n example of the invention adapted for use as a window screen; Figure 5: shows a side elevational view of the window S screen shown in Figure 4; Figure 6: shows exploded apart and in section a joint between a keeper and a side or top edge of the frame.

Figure 7: shows an alternative construction of keeper usable as a replacement or substitute for the keeper shown in Figure 6; and Figure 8: shows a perspective view on a large scale of an example of hinge joint used on the example shown in Figures 4

I-

2 and 3 in which the hinge joint is partially opened.

In Figure 1 the window or door screen shown has a frame 1 with a fibreglass mesh 2 insert. The frame 1 can be coloured and consist of a 13mm wide non-magnntic plastics strip which is bonded to the fibreglat- mesh 2.

The back 3 of the fibreglass mesh 2 has bonded to it a 13mm wide flexible plastics magnetic strip 4 such that the edges of the mesh 2 are sandwiched between the strips.

The screen is provided at locations 5 part of the way down the sides with butyl rubber inserts 6 which act as hinges. The hinges 'separate the lower portion 7 of the flexible magnetic strip from the upper portion thereof and ensure that the screen does not open beyond the point 5 and pu-1 away from the window or door frame as hereinafter described. The frame 1 and mesh 2 at the hinge 6 can be strengthened by installing strengthening means 8 which are bonded to both the mesh 2 and frame 1.

S0. The screen is preferably constructed so that the thickness of the rubber inserts and of the magnetic sealing strips are similar.

o 0 0 0 0 920501,wpftdisk75,43754.spe,5 -6- A window or door frame where the screen is to be installed is fitted with ferrous or magnetic fastening jmeans such as flexible magnetic tape or an oppositely poled magnetic strip. The position of such means matches to the flexible magnetic strip 4 which is fixed on the back of the screen.

Figures 5 to 7 illustrate two forms of keeper according to the invention.

As shown in Figures 5 and 6, keeper 16 is a plastics or aluminium extrusion which can be continuously or intermittently engaged with a top edge or side of the frame. The extrusion can, for example, be a plastics extrusion of the type used to support hardboard in joinery situations. The arm 17 of the extrusion 16 is sufficiently flexible to allow the frame supporting the mesh 2 to be clipped or slid into frictional engagement S..therewith.

0 0 The arm 17 includes a lip 18 which engages over a o raised region 19 formed along one edge of the frame OoJ The raised region 19 can be formed integrally with the frame 20 or may be fixed thereto.

a o S0 In another form of keeper shown in Figure 7, the 0 °0o keeper 16 has an additional lug or ledge 32 positioned so that the distance between ledge 32 and base 33 of the channel in the keeper 16 is the same as the width of the o "0 plastics strip from which the frame 1 is formed. This enables the frame to clip into the keeper 16. The keeper 16 is itself fixed to the window frame by double sided adhesive tape or the like.

SO 920501,wpftdisk75,43754.spe,6 ~-ce LI~YI----I L-I -(I -7- Thus the screen is held semi permanently in place by the keeper and the fastening means, giving it high wind resistance. To open or close the window or door, the screen is lifted up from the bottom, the butyl rubber hinge inserts acting as flexible hinges with the keeper and fastening means holding the screen firmly to the window or door from above the hinge line.

In the examples shown in Figures 2 to 4 the parts of the screen similar to those described with reference to the first example are referenced by the same numerals.

In the example shown in Figures 2 and 3 a door screen is shown. The screen has at the upper and lower corners, extra bracing 9 for strength. At 13 on the side edges 14 of the screen are hinges 6. The placement of the hinges 6 is such that the door screen can be folded back to allow entry or egress through. the door.

"o 20 In the example shown in Figures 4 and 5 a screen for a top hung window is shown. As the screen 15 is of 'smaller size and therefore less weight than the door screen, it need not include hinge means.

In use these examples provide a frame of which a 00 O part is semi permanently fixed to the window or door frame while the remainder is held in position by another fastening means, for example, a flexible magnetic tape which is attached to the window or door frame or an oppositely poled magnetic s cip mounted on the window or door frame.

In Figure 8 is shown in more detail a hinge joining of the type shown in Figures 2 and 3.

925o01,wptdisk75,43754spe,7 r Pe~lCI4, -8- In Figure 8 is shown a strip 21 of which at least the lower region 22 is a magnetic strip attached to the door frame (not shown). The plastics frame parts are indicated by strips 23 and 24, the lower strip 24 being hingeably attached to the strip 23 as described hereinafter. Initially a triangular section 25 of flexible material such as 0a a.

at a.

o ar

CCC,

a o a a) a a aII 1' 920501,pftdisk75,43754.spe,8 ne--_ i t -9butyl rubber or a strong fabric is formed, TEhrend 2~ of the strip 24 being butted against the lower edge 26 of the section The mesh 2 is laid on the triangular section 25 and strip 24 and is attached by a suitable adhesive.

A hinge member 28 is then fixed over the mesh 2, Ebe hinge member 28 being arrow head shaped. Cut-away regions 30 are covered by the outer strips 31 and 32 which are fixed in position to complete the joint. End 29 of the hinge member 28 extends between the ends 31a, 32a of the outer strips 31 and 32.

In use the hinge member 28 pivots as shown thereby allowing the screen at its lower point to move away from the magnetic strip 22.

Thus by this invention there is provided an improved insect screen for windows and doors.

Particular examples have been described and it is envisaged that improvements and modifications can take .O place without departing from the scope of the 4 ap#e 20 claims.

0o 0 So.

0o9 v 920114,gjndaLQ50,43754.res,9 1

Claims

1. A window or door screen, the screen comprising a flexible laminated plastics screen frame with a mesh insert, the laminated plastics screen frame being formed from lengths of a non- magnetic plastics strip and a plastics magnetic seal between which is sandwiched the mesh insert, the screen frame being supported by a non-magnetic keeper mounted on at least an upper part of a door or window fraie, the keeper being a plastics or aluminium extrusion in which the plastics screen frame is engaged to support the screen in position with at least an uppei- part of the periphery of the frame in cointact with the door or window frame, the remaining periphery of the screen frame being held magnetically in its closed position I o by a ferrous or magnetic fastening means fixed to the door or window frame while being readily releasable to allow access through the door or window.

2. A window or door screen as claimed in claim 1 wherein S the remainder of the door or window frame includes a plastics e0 0 magnetic locking seal as part of the fastening means. 00 0

3. A window or door screen as claimed in claim 2 wherein the screen frame has on opposit? sides or top and bottom thereof hinge means so that the portion thereof held to the door or window frame by the plastics magnetic locking seal is hingeable to allow it to be readily opened, the remainder of the screen frame being supported on the door or window frame by the keeper. 10 I r' Ks r

4. A window or door screen as claimed in any one of the preceding claims wherein the mesh insert is constructed from a fibreglass mesh material.

A window or door screen as claimed in any one of the preceding claims wherein the plastics strip lengths of the screen frame are formed from strips of plastics material cut from a sheet of plastics material or extruded strips of plasti. material.

6. windw or door screen as claimed in any one of the preceding claims wherein at least one hinge is formed in the plastics screen frame, the hinge being formed from a piece of rubber fitted in place of part of one of the said plastics strips, the piece of rubber being of the same width and thickness as the said strip.

7. A window or door screen as claimed in any one of the preceding claims wherein the corners of the plastics screen frame are braced by triangular shaped brace members manufactured from a plastics material.

8. A window or door screen as claimed in any one of claims I to 3 wherein the keeper is a plastics or aluminium extrusion which has a U-shaped, in section, region with an extension on one arm of the U, the longer arm having a ledge at its free end to enable the plastics frame to clip engage in the U-shaped region and be held therein by the ledge. Qo q oo ooo ooo oo o o ou 0 11

9. A window or door screen substantially as hereinbefore described with reference to Figure 1 of the accompanying drawings.

A door screen substantially as hereinbefore described with reference to Figures 2 and 3 of the .c3-mpanying drawings.

11. A window screen substantially as hereinbefore described with reference to Figures 4 and 5 of the accompanying drawings.

12. A door or window screen substantially as hereinbefore described with reference to Figure 6 and 7 of the accompanying drawings. o00 Dated this 8th day of May, 1992 o o 00 o TREVOR JAMES BUNTING, ROBERT WAYNE McAULLAY and TIMOTHY HOPKINS 00o By their Patent Attorneys DAVIES COLLISON CAVE S0 o L.i i /T u