AU2004278445B2 - Trap apparatus - Google Patents

Description

WO 2005/033418 PCT/AU2004/001289 1 TRAP APPARATUS Field of the Invention The present invention relates to trap apparatus. 5 This invention has particular application to trapping and retaining wind blown waste matter, for example wind blown litter, and for illustrative purposes the invention will be described hereinafter with reference to this application. However, it will be appreciated that this invention may find use in alternate applications, such as field collection of wind blown organisms or the like. 10 Definition In the specification and claims the term "comprising" shall be understood to have a broad meaning similar to the term "including" and will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the 15 exclusion of any other integer or step or group of integers or steps. This definition also applies to variations on the term "comprising" such as "comprise" and "comprises". Background of the Invention 20 A landfill is a carefully engineered depression in the ground into which waste material in dumped. A landfill provides a secure environment for this disposed waste whereby any water related connection between the dumped waste and the surrounding environment, particularly ground water, is avoided. Regulatory agencies, such as the Environmental Protection Agency of 25 Australia, also mandate requirements for landfill design and maintenance in an attempt to minimize the potential for wind blown litter. Wind blown litter is dispersed over the site with a propensity to be concentrated at particular areas of the site under the influence of topography and/or built environment. Landfills are usually created with a boundary of fencing to, 30 amongst other things, form an intentional trap for wind blown litter to stop it escaping from the landfill site. Such fences are normally constructed of chain wire fencing having a height of eight feet.

WO 2005/033418 PCT/AU2004/001289 2 Such wind blown litter is usually removed from the boundary fence in order to minimize the potential for foul odours, ground water contamination, fires, pollution, blowing litter, disease and vermin infestation. Conventionally, litter is removed manually to trucks or mobile bins for transport to an appropriate site. This is labour 5 intensive and carries the risk of injury and disease transmission that attends contact with such materials. In addition to landfills, wind blown matter can also cause problems in a number of other situations. For example in places where people gather such as parks, playgrounds and outdoor events, there is a tendency for wind blown litter to 10 also accumulate on fence lines and other barriers. Brief Summary of the Invention According to a first aspect of the present invention there is provided trap apparatus including a body defining a trap opening supported across a stream of 15 wind blown matter to be trapped, and a wind-permeable receptacle supported down stream of the trap opening and at least partially formed of a material having an effective mesh size selected whereby the wind passes therethrough whilst the matter is retained. Wind-blown waste is principally a ground-effect phenomenon. Accordingly the 20 body may be configured whereby the trap opening extends down substantially to ground level. The body may for example comprise an arch-like member standing on or fixed to the ground. Alternatively the body may comprise a hoop structure. Preferably, the hoop structure is a substantially rectangular hoop whereby the cross section of intercepted waste stream is maximised. The body member may be 25 formed with the receptacle whereby the body and receptacle in assembly may be removed for emptying or relocation. The body is, as described above, preferably configured to maximise the cross section of the trap opening in the ground effect zone in which most wind-blown waste is to be found. The effective cross section may be yet further optimized by providing 30 the apparatus with guide walls extending upwind divergently from the opening. The guide walls may comprise a funnel-like structure. The guide walls may alternatively comprise side walls constraining the flow of the ground effect flow, with or without a top wall serving to reduce any tendency for the flow to climb over the WO 2005/033418 PCT/AU2004/001289 3 body due to resistance to flow through the receptacle. The guide walls may be solid sheet material. Alternatively the guide walls may comprise a frame of metal or the like and supporting a tensioned sheet, fabric or mesh material. Preferably the guide walls include perforations or apertures to provide an effective mesh size to allows 5 wind to pass through while the wind blown matter is retained and transported to the trap apparatus' opening. The angle of divergence of the side guide walls may be determined empirically having regard to the local conditions. However, in general it has been determined by the inventor that a suitable range of angles at which the guide walls may diverge from 10 the axis of the body and receptacle is from about 350 to 700. A preferred angle range is 450 to 600. A more preferred angle range is 500 to 604. The receptacle may comprise a mesh bag having an opening supported on the body about the trap opening. Such a receptacle would preferably be removable from the body to allow emptying and replacement. 15 The receptacle may include a frame structure formed separately from or integrally with the body. The receptacle may be of substantially the same and constant cross section as a trap opening. For example, the receptacle may comprise a substantially rectangular-prismatic frame defining a recess behind a substantially rectangular body. Alternatively the receptacle may comprise walls that converge 20 away from the opening. The receptacle may include a flexible or rigid mesh material supported on the frame. The receptacle may in the alternative further include a mesh bag having an opening supported on the body about the trap opening. The receptacle may be removable from the body for emptying and replacement. The trap apparatus may in assembly comprise a frame of metal or the like and 25 support a tensioned sheet, fabric or mesh material. Where mesh material is used it may be flexible or rigid. Additionally the receptacle may also include a mesh bag having an opening supported on the body about the trap opening. Preferably the mesh bag and/or the receptacle would be removable from the body for emptying and replacement. 30 Alternatively the collected matter may be tipped out of the apparatus or vacuumed out. The effective mesh size (including that of the guide walls if present) should be of a size selected to allow wind to pass therethrough whilst wind-blown matter is WO 2005/033418 PCT/AU2004/001289 4 retained. Suitable sizes range from 0.5 mm 2 to 75mm 2 , preferred sizes range from 25 mm 2 to 60 mm 2 .More preferred sizes range from 35 mm 2 to 50 mm 2 . Furthermore in preferred embodiments the material used is selected to maximise the open area. The trap apparatus may be a rigid or semi-rigid structure. A rigid apparatus 5 may be composed of for example a material like metal, steel, wire mesh or moulded plastic. The material may be a solid sheet like piece of material which is perforated to create apertures or may be mesh like. The material may be manipulated in any suitable manner to create an appropriately shaped apparatus. In one embodiment the trap apparatus includes at least one additional 10 receptacle positioned above the first receptacle. Further to this one or more of the additional receptacles may also be adapted to receive the overflow of wind-blown matter once the first receptacle is substantially full. The apparatus may further comprise attachment means enabling pick up, put down and/or transportation of the trap apparatus by a material mover, such as a 15 landfill prime mover, in order to effect easy emptying. One or more buffers may be associated with the attachment means. Preferably the attachment means associate with a blade or bucket of a material mover or the prongs of a fork lift. More preferably the attachment means are adaptable to associate with any size blade, bucket or fork lift prong. 20 In a preferred embodiment the attachment means are located to allow rear pick up, put down and/or transportation of the apparatus from behind the trap opening. The trap apparatus may be designed such that the opening is supported above ground level. The trap apparatus may also then include one or more guide 25 flaps which extend across a part of the body and any side guide walls that are proximal to the ground and slope downwardly to contact the ground. The apparatus or part thereof may be UV resistant to prevent UV breakdown of waste retained within the apparatus. Furthermore chemical dispensing means for dispensing chemicals, such as 30 deodoriser, into the receptacle of the apparatus may be provided on the assembly. The deodorizer associated with the receptacle of the apparatus will also assist in weighting down the wind blown litter.

WO 2005/033418 PCT/AU2004/001289 5 The deodorizer can also act as a general site deodorizer by allowing certain water jets to project in a vertical like direction to reduce the potential of odours leaving the general grounds. When used at a landfill, a water jet may be directed at the tipping vehicles at 5 the working face of the landfill during high wind times that will assist in the weighting down of the potential wind blown litter as it escapes the rear of the unloading trucks. In a preferred embodiment the apparatus is at least partially collapsible or fully collapsible. The apparatus may be appropriate for use at landfill sites, recycling centres, 10 transfer stations, industrial yards, refuse collection site, outdoor events, playgrounds or anywhere there is likely to be a build up of wind blown matter. According to a second related aspect of the present invention there is provided a trap fence, the fence comprising a plurality of apparatuses as referred to above. In a preferred embodiment the trap fence is comprised of a plurality of 15 apparatuses which include flared guide walls. A degree of overlap would preferably exist between the side guide walls of a first apparatus, and a side guide wall of an adjoining second apparatus in the fence, so that it is virtually impossible for litter to find its way between two adjoining apparatuses. According to a further related aspect of the present invention there is provided 20 the use of the above referred to apparatus or fence for trapping and retaining wind blown litter at a landfill site, recycling centre, transfer station, industrial yard, refuse collection site, outdoor event, playground or anywhere there is likely to be a build up of wind blown matter. A further related aspect of the present invention relates to a landfill site, 25 recycling centre, transfer station, industrial yard, refuse collection site, outdoor event, playground or anywhere there is likely to be a build up of wind blown matter provided with an assembly or a fence as referred to above. Yet a further related aspect of the present invention relates to the removal of wind blown litter from a landfill site, recycling centre, transfer station, industrial yard, 30 refuse collection site, outdoor event, playground or anywhere there is likely to be a build up of wind blown matter by mechanically picking up a litter laden apparatus as referred to above and removing the litter retained therein, for example by removing a WO 2005/033418 PCT/AU2004/001289 6 section of the receptacle to allow the litter to drop from the apparatus into a litter collection vehicle or removing the litter from the apparatus by vacuum means. 5 Brief Summary of the Figures The present invention will now be described by way of the following description having reference to the figures, wherein: - Figure 1 is a rear perspective view of a preferred embodiment of the 10 present invention; - Figure 2 is a front perspective view of the embodiment from Figure 1; - Figure 3 is a top view of the embodiment from Figures 1 and 2; - Figure 4 is a side view of this embodiment; - Figure 5 is a view from below of this embodiment; 15 - Figure 6 is a front view of this embodiment; - Figure 7 is a rear perspective view of a further preferred embodiment of the present invention; - Figure 8 is a front perspective view of the embodiment from figure 7; - Figures 9-12 are further views of the embodiment as shown in figure 20 7 corresponding to figures 3-6; - Figure 13 shows a plurality of the embodiments as shown in figure 7, from above, when.arranged side by side in a staggered configuration to provide a rubbish catching fence; - Figure 14 shows a front view of the configuration from figure 13; 25 - Figure 15 is a rear perspective view of another preferred embodiment of the present invention; - Figure 16 is a rear perspective view of a variation of the embodiment shown in figure 15; - Figure 17 is a rear view of the embodiment of figure 16, with wire 30 mesh lining; - Figure 18 is a top view of the embodiment of figure 17; - Figure 19 is a rear perspective view of the embodiment of figure 16 partially collapsed; WO 2005/033418 PCT/AU2004/001289 7 - Figure 20 shows a plurality of two embodiments as shown in figures 1 to 12 and 15 to 19, viewed from above, when arranged to provide a trap fence arrangement. 5 In figure 1 a trap apparatus 1 is provided with a body 3 and a receptacle 6. The opening is defined by stringers 12 and 32 and upright support bars 5 and 18. The receptacle 6 may be fitted with a removable or fixed lining (not shown) which associates with the boundaries of the receptacle as defined by 40, 42 and 44. In an exemplary embodiment a non-rigid, cloth like, removable lining would form the 10 receptacle 6. The trap apparatus 1 includes guide walls that extend from the body. The guide walls extend from the top (4), sides (8) and bottom (2) of the body 3 to form a funnel type structure. The guide walls may be solid sheet like structures or may include perforations or apertures. 15 The bottom guide wall 2 comprises a lying front steel pipe 10, which runs parallel with a shorter rear steel pipe 12, the front and rear steel pipes 10, 12 respectively being separated by two oppositely arranged lying steel pipes 14 and 16 extending therebetween. The front 10, rear 12, and side pipes, 14, 16 are joined together by means of 20 appropriately placed pipe clamps P. The side pipes 14 and 16 bend upwards, forwards and back on themselves after passing through the pipe clamps P joining the rear steel pipe 12 to the side pipes 14 and 16, at an angle A. In the depicted embodiments A is 55 degrees, however other angles may be appropriate depending on the wind conditions on site. 25 These upwardly inclined sections 18 and 20 respectively, extend upwardly and forwardly over the bottom guide wall 2 to terminate in two down turned umbrella handles as it were 22, 24 which are positioned above terminals T of the side pipes 14 and 16. Adjacent the umbrella handles 22, 24, an upper steel pipe 26 extends 30 between the descending roof pipe sections 18 and 20 and is joined thereto by pipe clamp sections P.

WO 2005/033418 PCT/AU2004/001289 8 The inclined pipe sections 18 and 20 are further joined by the rear steel pipe 12 which extends therebetween and is attached thereto by means of pipe clamps P arranged at the interior of rear elbow bends 28 and 30 of the side pipes 14 and 16. Furthermore the inclined pipes 18 and 20 are also joined by a further length of 5 steel piping 32 extending therebetween, arranged between the upper steel pipe 26 and the lower rear steel 12. Attached to the middle of the steel pipe 32 and depending therefrom is a joining steel pipe 34 which links the steel pipe 32 to the lower rear steel pipe 12. As will be seen, the front steel pipe 10 side lying steel pipes 14 and 16 and 10 rear steel pipe 12 all lie in the same imaginary plane. Front, extending upwardly to the rear, steel bars 36 and 38 are joined adjacent to the terminals T, to the lying steel pipes 16 and 14 at one end and at an upper end thereof are joined to the descending steel pipes 18 and 20 to be joined thereto, between the upper horizontal steel pipe 26 and the middle horizontal steel pipe 32. 15 The lying steel pipes 14 and 16, forwardly inclined steel pipes 18 and 20 and rear inclined steel support pipes 36 and 38 also occupy the same imaginary plane. The same is true of horizontal steel pipes 26, 32 and 12. Since the rear floor pipe 12 is not as long as the front floor pipe 10, the side pipes 14 and 16 occupy a flared arrangement in joining these pipe sections together 20 which provides the funnel or 'snow shovel' like form of the apparatus. Steel loops 40, and 42, are joined to the descending pipes 18 and 20 at one end just above the elbow bends 28 and 30 of the pipes 18 and 20 and at the other end just below the middle steel bar 32. The rear inclined steel support pipe 34 is also provided with a corresponding 25 steel loop 44. Attachment means in the form of two steel hooked pipes 46 and 48, for enabling pick up and put down of the apparatus by waste disposal vehicles, are affixed to the apparatus by means of two steel pipes 50 and 52 extending outwardly from the rear of the apparatus from the horizontal steel support pipe 32 which steel 30 pipes 50 and 52 are arranged opposite two corresponding steel pipes 54, 56 which correspondingly extend from the lower rear steel pipes 12. The steel hoops 46 and 48 are each joined two upright steel pipe sections 58, 60 each of which are attached to the steel pipes 52 and 54, 50 and 56 respectively.

WO 2005/033418 PCT/AU2004/001289 9 Buffer Plates 62 and 64 are arranged at the intersections of the pipes 56 and 60 respectively 54 and 58. The areas between the steel pipes can be closed. In a preferred embodiment, UV resistant netting, not shown, can be pulled 5 over the apparatus around the steel hoops 40, 42 and 44 to be hooked over the umbrella handles 24 and 22 and fastened around the side guide walls 8 in order to provide a self contained, closed body whereby the lower front steel pipe 10, the upper front steel pipe 26 and upwardly, rear inclined steel pipes 36 and 38 define a body opening 0 which funnels into a chute or fluted rear collection area defined by 10 the rear extending steel hoops 40, 42 and 44. In use, a plurality of such trap apparatuses can be arranged around the perimeter of a landfill site (see figures 13 and 14), whereby the winged side guide walls 8 of a first trap apparatus 70 contact corresponding side guide walls 8 of a second trap apparatus 72 in a somewhat staggered formation, not shown, in order to 15 provide a seamless fence and litter collection arrangement. A plurality of the trap apparatuses are preferably placed within but not bounded to 150 meters of the working face. The predominate use for the fence is around a 600 m 2 exposed rubbish working face on the landfill. Here the fence catches the wind blown litter as it leaves 20 the work face / back of the truck before it is taken by the wind and spread throughout the whole landfill facility. The trap apparatuses can be relocated by attaching to the blade or a bucket of a prime mover on the landfill to suit the direction of the wind at that time. At the landfill site wind blown litter is collected from the trap apparatus by 25 loading the receptacle of the apparatus through the assistance of wind direction or manually. The trap apparatus is then attached to a prime mover and relocated to workface tip area where the trapped wind blown litter in the fluted rear of the apparatus is emptied by removing clips, not shown, on the netted section. The apparatus can be left in position and the litter removed by the aid of a vacuum. 30 The embodiment shown in figures 7-14 is provided with extended rear attachments 68, which rear attachments are adjustable in two ways. The elongated rear attachments provide an increased wind rating advantage due to the rear locality and the overall length of the apparatus.

WO 2005/033418 PCT/AU2004/001289 10 In figure 15 a trap apparatus 100 is provided with a body 102 and a receptacle 104. The opening of the body is defined by substantially vertical members 106 and 110 and substantially horizontal members 108 and 112. Guide walls 116 are also present to direct wind, and accordingly wind blown matter through the opening and 5 into the receptacle 104. The guide walls may be composed of a sheet like material or contain perforations or apertures. The trap apparatus 120 depicted in figure 16 is essentially the same as the trap apparatus 100 of figure 15 except that the guide walls 122 are shaped differently. The boundaries of the receptacle 104 of the trap apparatuses 100 and 120 are 10 defined by a rigid frame, while the receptacle itself may be formed by either a removable or a fixed lining associated with the frame. An exemplary removable or fixed lining would be wire mesh 124 welded to the frame (figure 17). Both the trap apparatus of figure 15 (100) and of figured 16 to 19 (120) are raised above the surface on which they are supported by hollow feet 114. These feet 15 114 are designed to enable the trap apparatus to be picked up, put down and/or transported by the prongs of a fork lift. Where feet 114 or any other structural elements are present to lift the trap apparatus above the ground are present, the trap apparatus should also include guide flaps 128. Such guide flaps would extend across a part of the body and any side guide walls that are proximal to the ground 20 and slope downwardly to contact the ground. The trap apparatuses 100 and 120 may be partially collapsible insofar as collapsible guide walls 127 may be folded down or in (for example in the direction of the collapsing arrow C in figure 19) to form an overall box type structure. Receptacle side walls 126 may fold inwards away from the receptacle frame 125 (figures 18 and 25 19). Finally the frame itself may be collapsible. As with the first described embodiment, in use, a plurality of these trap apparatuses can be arranged around the perimeter of an area where there is expected to be a build up of wind blown matter (see figure 20), whereby the guide walls 116 or 122 of a first trap apparatus 134 contact corresponding guide walls 116 30 or 122 of a second apparatus 136 in a somewhat staggered formation, in order to provide a seamless fence and litter collection arrangement 132. Alternatively a plurality of a combination of the two types of embodiments depicted in the figures may by used to provide a seamless fence and litter collection WO 2005/033418 PCT/AU2004/001289 11 arrangement as seen in figure 20. It is envisaged that a likely use of the two types of trap apparatuses depicted in the figures is that the trap apparatus depicted in figures 1 to 14 would provide the primary fence 130, while the trap apparatus depicted in figures 15 to 19 would be positioned either individually at specified locations or in a 5 similar trap fence like arrangement 132 behind the first trap apparatus fence. The foregoing embodiments of the present invention not only form barriers to wind blown matter, but actively entrap any such matter within the receptacle whereby once any matter has encountered the trap apparatus, it is retained therein and not susceptible to being blown up and over the apparatus into the surrounding area. 10 In a most preferred embodiment the trap apparatus is constructed from 100mm, 76mm and 40mm steel pipe frame sections that are joined together using pipe clamps and bolts. The apparatus can be dismantled at the clamp joins for transport and storage purposes. 15 The receptacle of the apparatus is preferably constructed at least partially of sections of ultraviolet protected fish like netting whereby each section may be easily removed and replaced. The rear pick up attachments are preferably adjustable to suit the varying types of blade and bucket type landfill prime movers. 20

Claims (38)

1. A trap apparatus including a body defining a trap opening supported across a stream of wind blown matter to be trapped, and a wind-permeable receptacle supported down-stream of the trap opening and at least partially formed of a material having an effective mesh size selected whereby the wind passes therethrough whilst the matter is retained; said trap apparatus further comprising guide walls extending upwind divergently from the opening.

2. The trap apparatus of claim I wherein the trap opening extends down substantially to ground level.

3. The trap apparatus of claim 1 or claim 2, wherein the body is selected from a group comprising an arch-like member standing on or fixed to the ground and a hoop structure.

4. The trap apparatus of claim 3, wherein the body comprises a substantially rectangular hoop structure.

5. The trap apparatus of any one of claims 1 to 4, wherein the body and/or the receptacle may be removed for emptying or relocation.

6. The trap apparatus of any one of claims I to 5, wherein the guide walls comprise a funnel-like structure.

7. The trap apparatus of any one of claims I to 5, wherein the guide walls comprise side walls with or without a top wall.

8. The trap apparatus of any one of claims 1 to 7, wherein the guide walls are composed of a solid sheet material. aGVGU J2 L1itigtUL LUUJ 13

9. The trap apparatus of any one of claims 1 to 8, wherein the guide walls include perforations or apertures of a size that allows wind to pass through while the wind blown matter is substantially retained and transported to said opening.

10. The trap apparatus of any one of claims I to 9, wherein the angle that the guide walls diverge from the axis of the body and receptacle is from about 35* to 70*.

11. The trap apparatus of claim 10, wherein the angle that the guide walls diverge from the axis of the body and receptacle is from about 450 to 600.

12. The trap apparatus of claim 11, wherein the angle that the guide walls diverge from the axis of the body and receptacle is from about 500 to 600.

13. The trap apparatus of any one of claims 1 to 12, wherein the receptacle comprises a mesh bag having an opening supported on the body about the trap opening and removable from the body for emptying and replacement.

14. The trap apparatus of any one of claims 1 to 12, wherein the receptacle includes a frame structure formed separately from or integrally with the body.

15. The trap apparatus of any one of claims 1 to 14, wherein the receptacle is of substantially the same and constant cross section as the trap opening.

16. The trap apparatus of any one of claims 1 to 14, wherein the receptacle converges away from the opening.

17. The trap apparatus of any one of claims 1 to 16, wherein said body and receptacle in assembly comprise a frame of metal or the like and supporting a tensioned sheet or fabric, or mesh material. 14

18. The trap apparatus of claim 17, wherein the material is selected from flexible or rigid mesh material.

19. The trap apparatus of any one of claims 14 to 18, wherein the receptacle further includes a mesh bag having an opening supported on the body about the trap opening and removable from the body for emptying and replacement.

20. The trap apparatus of any one of claims 14 to 18, wherein the receptacle is removable from the body for emptying and replacement.

21. The trap apparatus of any one of claims 1 to 20, wherein the material having an effective mesh size of from about 0.5 mm 2 to 75mm 2 .

22. The trap apparatus of claim 21, wherein said effective mesh size is from about 25 mm 2 to 60 mm 2 .

23. The trap apparatus of claim 22, wherein said effective mesh size is from about 35 mm 2 to 50 mm 2 .

24. The trap apparatus of any one of claims 21 to 23, wherein the material is selected to maximize the open area.

25. The trap apparatus of any one of claims 1 to 24, further including at least one additional receptacle positioned above the first receptacle and adapted to receive the overflow of said wind blown matter once the first receptacle is substantially full.

26. The trap apparatus of any one of claims 1 to 25, further comprising attachment means enabling pick up, put down and/or transportation of the trap apparatus by a material mover.

27. The trap apparatus of claim 26, wherein the attachment means associates with a blade or bucket of a material mover or the prongs of a fork lift. A ___A- Received 5 August 2005 15

28. The trap apparatus of claim 26 or claim 27, wherein the attachment means are located to allow pick up, put down and/or transportation of the apparatus from behind the trap opening.

29. The trap apparatus of claim 20, further comprising attachment means enabling pick up, put down and/or transportation of the receptacle by a material mover.

30. The trap apparatus of any one of claims I to 29, wherein said opening is supported above ground level. and wherein there is provided one or more guide flaps which extend across a part of the body and any side guide walls that are proximal to the ground and slope downwardly to contact the ground.

31. The trap apparatus of any one of claims 1 to 30, further including a chemical dispensing means for dispensing chemicals, such as deodoriser.

32. The trap apparatus of any one of claims 1 to 31, wherein the trap apparatus is at least partially collapsible.

33. A trap fence comprising a plurality of the trap apparatus of any one of claims 1 to 32.

34. The trap fence of claim 33, wherein a degree of overlap exists between a first apparatus and an adjoining second apparatus in the fence.

35. Use of the trap apparatus of any one of claims 1 to 32 or the trap fence of claim 33 or 34 for trapping and retaining wind blown litter at a landfill site, recycling centre, transfer station, industrial yard, refuse collection site, outdoor event, playground or anywhere there is likely to be a build up of wind blown matter. Received 5 August 2005 16

36. A method of removal of wind blown litter from a landfill site, recycling centre, transfer station, industrial yard, refuse collection site, outdoor event, playground or anywhere there is likely to be a build up of wind blown matter by mechanically picking up a litter-laden trap apparatus of any one of claims 1 to 32, and removing the litter retained therein.

37. A trap apparatus substantially as herein described in the Figures and the Detailed Description thereof.

38. A trap fence substantially as herein described in the Figures and the Detailed Description thereof.