Abstract:
This invention relates to fly traps and specifically a window mounted fly trap which allows flies to enter from below or above and which has an internal barrier to prevent passage upward or downward through the trap. A window mounted fly trap comprising: (a) a frame for mounting to a window surface by detachable window mounting means; (b) a resilient cover having a non-adhesive first surface facing to the exterior of the frame and an adhesive second fly capture surface within the interior of the frame; said frame and cover defining therein a fly capture chamber; (c) the capture chamber having at least one ingress slot for permitting flies to enter the chamber; (d) wherein the flies walking on the surface of said window are permitted to enter the capture chamber and whereby the flies, when attempting to fly, contact the fly capture adhesive and are captured by said capture surface.

Description:
FIELD OF THE INVENTION 
       [0001]    This invention relates to fly traps and specifically a fly trap which is mounted on a window and allows flies to enter the trap from below or above the trap. 
       BACKGROUND OF THE INVENTION 
       [0002]    The common house fly and related pests are annoying and present a health hazard when flying around a person&#39;s food, or garbage, or when landing on a meal of exposed food to be eaten by a person. Because they have sponging mouthparts, house flies cannot bite humans. However, they have been demonstrated to mechanically transmit the causative agents of diarrhea, cholera, yaws, dysentery, and eye infections. Flies are also implicated as mechanical vectors of  Shigella  and  Salmonella , the latter being a pathogen responsible for food poisoning. 
         [0003]    There are many devices available to combat flies such as a fly swatter, an adhesive fly strip and chemical spray. 
         [0004]    U.S. Patent Application 2005/0005503, Bragg, shows a hanging fly trap in the form of an artificial plant basket. This device must be hung out of sight and so some effort is needed to monitor the number of flies caught by the trap and then retrieve the trap for cleaning and replacement of adhesive surfaces. 
         [0005]    U.S. Patent Application 2005/0126069, Taylor and Lambert, discloses an ornate household fly trap which relies upon ultraviolet light to attract the insect and an adhesive surface to catch it. This device uses a power source and is very complex. It is therefore expensive to manufacture and the purchase price to a consumer is high. 
         [0006]    There is a need for a simple, safe and visually attractive fly trap that can be manufactured and sold inexpensively, and does not rely upon pheromones and UV light sources for effectiveness. 
       SUMMARY OF THE INVENTION 
       [0007]    A window mounted fly trap comprising: a frame for mounting to a window surface by window detachable mounting means; a cover having a non-adhesive first surface facing away from the frame and an adhesive second fly capture surface facing to the interior of the frame; said frame and cover defining therein a fly capture chamber; and at least one ingress opening in the frame for permitting flies to enter the chamber. 
         [0008]    The frame can include a mid-member, the frame, cover and mid-member in combination forming two fly capture chambers, with fly ingresses into each capture chamber. The trap can include a first and a second wall preventing flies from leaving the capture chamber. 
         [0009]    The cover can be resilient and disposable. The window mounting means can comprise at least one suction cup mounted to the mid-member for releasably adhering to the window. 
         [0010]    The cover can be releasably secured to the frame by at least one peg. The cover can include at least one projecting tab which can assist in removal of the cover from the frame. 
         [0011]    The frame can include a first wall and a second opposite wall, and a first insect ingress on one side of the frame between the first and second walls and a second insect ingress opposite the first ingress between the first and second walls. 
         [0012]    The side of the frame and the side of the mid member that are adjacent the cover can have a series of projections thereon. The cover can be transparent or it can have a colour. 
     
    
     
       DRAWINGS 
         [0013]    Exemplary embodiments are illustrated in referenced figures of the drawings. It is intended that the embodiments and figures disclosed herein are to be considered illustrative rather than restrictive. 
           [0014]      FIG. 1  is a perspective view of the top surface of one embodiment of the window fly trap according to the invention. 
           [0015]      FIG. 2  is a perspective view of the bottom surface of one embodiment of the window fly trap. 
           [0016]      FIG. 3  is a detailed perspective view of a portion of a cover including an attachment tab that fixes the cover to a fly trap frame. 
           [0017]      FIG. 4  is a perspective view of the top surface of a frame of one embodiment of the window fly trap. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0018]    The invention described herein is a window mounted fly trap that relies on natural light as an attractant. The invention takes advantage of two natural habits of the fly: (1) flies are attracted to light; and, (2) over time, after landing on a window, flies tend to completely explore the entire surface of the window. Windows are natural places for flies to congregate because they are attracted to light being transmitted through the window from the opposite side. Therefore, mounting a fly trap on a window increases the chances of catching a fly. Such a window trap is more effective than simply relying upon random flight patterns for catching a fly. 
         [0019]    The invention comprises a generally rectangular frame which is releasably mounted on a window using suction cups. This creates a fly catching chamber between the window and the cover of the trap. The two shorter opposite and parallel ends of the frame contact the window and thereby seal the fly catching chamber on two sides against egress of a fly. The two longer opposite and parallel sides of the frame are recessed from the window. When the trap is mounted on the window with the longer sides horizontal, this orientation permits the flies to enter into the capture chamber from above or below as they walk about on the surface of the window glass. The suction cups are mounted to the frame by a frame-bisecting mid-member that prevents flies passing through the trap. On the side of the frame opposite the window, there is temporarily fixed a resilient cover that is coated with a suitable fly catching contact adhesive on its inner surface. The adhesive capture surface faces inwardly in the direction of the window. When the fly encounters the barrier mid-member, it will tend to fly off the window surface and, in doing so, impinge directly onto the adhesive capture surface, whereupon it will be trapped. The resilient cover is fixed to the frame at its corners by mounting pegs located on the outside corners of the frame. Once the adhesive capture surface is covered with flies, it can be removed from the frame and hygienically disposed of A fresh cover with adhesive surface can be easily re-attached to the frame. When the frame is mounted to a window, it is easy for a person to view the condition of the fly capture surface from the opposite side of the window. 
         [0020]    Accordingly, this invention is directed to providing a window mounted fly trap which relies upon the natural instincts of the fly for effectiveness. The fly trap does not rely upon the use of chemicals or artificial attractants. The trap is reusable. The trap is easy to use because the flies are readily trapped and can be hygienically disposed of The fly trap is inexpensive to manufacture and therefore inexpensive to purchase. 
         [0021]      FIG. 1  represents a perspective view of the top surface of one embodiment of the window fly trap  10 . Specifically,  FIG. 1  illustrates a top surface  13  of a cover  12 , the exterior surface of which is non-adhesive. The top surface  13  is to the top surface of an underlying frame  14  by corner pegs  16 ,  18 ,  20  and  22  that protrude above the frame top surface  13 . The cover  12  is apertured at its corners to accept the four frame corner pegs  16 ,  18 ,  20  and  22 . The cover  12  includes at its top corners a first tab  24  and a second tab  26  that permit easy mounting and removal of the cover without the operator having to contact the underlying adhesive bottom surface of the cover  12  or any flies that are attached to it. 
         [0022]    The frame  14  is rectangular and comprises a first short side  28  and a second short side  30  which are parallel to one another and a first long side  32  and a second long side  34  (not visible) which are also parallel to one another. The short sides  28  and  30  of the frame  14  are of greater width than the two long sides  32  and  34  and are designed to contact a window surface  36  (shown as a circle) by way of a pair of supporting members  38  and  40 . The long sides of the frame  32  and  34  (by being of narrower width) are recessed from the window surface a distance equal to the height of the supporting members  38  and  40  so that fly ingress slots  42  and  44  are created between the frame  14  and window  36 . These slots  42  and  44  permit flies to enter the trap  10  as they walk about on the surface of the window  36 . 
         [0023]      FIG. 2  represents a perspective view of the bottom surface of the embodiment of the window fly trap  10  shown in  FIG. 1 . The frame  14 , the parallel short sides  28  and  30 , the supporting members  38  and  40  and the parallel long sides  32  and  34  of the frame are clearly visible. The bottom surfaces  50  and  52  of the supporting members  38 ,  40  are linear and smooth to permit intimate contact with the window surface. The inner surface  62  of the cover  12  is covered with a suitable adhesive that is capable of catching and holding a flying insect but is not toxic or odiferous to humans. 
         [0024]    The top surface of the frame  14  includes a series of equally spaced projections  68  around the frame  14 , the tops of which contact the adhesive inner surface of the cover  12 . Since the tops of the projections  68  provide non-continuous contact with the inner surface  62  of the cover, this permits easy removal and disposal of the cover  12 . 
         [0025]    The bottom surfaces  70  and  72  of the tabs  24  and  26  extending from the frame  14  are not adhesive so the operator can remove the cover  12  and the pegs  16 ,  18 ,  20  and  22  without adhesive contact and without contacting flies that might be trapped on the adhesive bottom surface  62  of the cover  12 . It is evident from  FIG. 2  that once the flying insect attempts to attain flight, the low profile of the cover  12  and frame  14  encourages the insect to contact the adhesive capture surface  62  of the cover  12  and become trapped. 
         [0026]      FIG. 2  represents the view that faces the operator when she or he is on the opposite side of the window. In this way, the operator can easily see when the capture surface  62  of the cover  12  is congested with trapped flies and needs to be exchanged for a fresh cover. 
         [0027]      FIG. 2  also shows a mid-member  74  that extends between the two parallel opposite short sides  28 ,  30  at their mid-point and parallel to the two parallel opposite long members  32 ,  34 . The mid-member  74  bisects the interior of the frame  14  and defines two insect capture chambers  60 . The mid-member  74  is adapted to hold two conventional suction cups (not shown) by way of a pair of mounting collars  76  and  78  located at separate points on the mid-member  74 . The suction cups in turn are adapted to releasably mount the frame  14  to the surface of the window  36 . The bottom side  80  of the mid-member  74  is of the same height as the two parallel short sides  28 ,  30  so that flies are impeded from traveling from one capture chamber  60  to the other. The mid-member  74  encourages the fly to take off when it encounters the mid-member  74 . The top side  82  of the mid-member  74  also includes a series of projections  84 , the tops of which contact the bottom adhesive surface of the cover  12  and maintain it in place. Since only the tops of the projections  68  and  84  contact the sticky side of the cover  12 , and thereby avoid continuous contact with the cover  12 , they facilitate the operator removing the cover  12  from the frame  14 . 
         [0028]      FIG. 3  illustrates a detailed perspective view of part of the frame  14  with a corner peg  16  used to guide the cover  12  onto the top of the frame  14 . Tab  24  is shown adjacent to the peg  16 . The tab  24  does not have adhesive on either side. 
         [0029]      FIG. 4  illustrates a perspective view of the top of the frame  14  illustrating the four corner pegs  16 ,  18 ,  20  and  22 . The first and second short sides  28  and  30  of the rectangular frame  14  and the first and second long sides  32  and  34  of the rectangular frame  14  are shown.  FIG. 4  also shows the first and second frame supporting members  38  and  40 , the first and second ingress slots  42  and  44 .  FIG. 4  further illustrates the series of upward projections  68  disposed around the periphery of the outer top surface  66  of the frame  14  and the upward projections  84  at the top of the mid-member  74 .  FIG. 4  also illustrates the pair of capture chambers  60  formed by the frame  14  and the mid-member  74 . The mid-member  74  includes first suction cup mounting collar  76  and the second suction cup mounting collar  78 . 
         [0030]    The cover  12  may be formed from a suitable plastic sheet. The frame  14  may be injection molded from a suitable thermoplastic material as a single piece according to conventional techniques. 
       EXAMPLE 1 
     Experimental Evaluation of Prototype Window Fly Traps 
       [0031]    Four prototype window fly traps were manufactured according to the design described herein. They were mounted equidistant from each other in a horizontal line on a north-facing window measuring 2.4 m long and 1.2 m high in a room measuring 3×4 m held at approximately 20° C. They were fitted with a clear plastic cover or resilient paper covers, all having adhesive capture surfaces facing toward the window glass. The paper covers were coloured yellow, green or white on the side facing into the room. Placement of the four types of covers on traps was randomized. 
         [0032]    House flies (number unknown) were collected in a jar from a large cage in which the flies were reared. The jar was placed in the room, and opened, allowing the flies to be released. The lights were then turned off, and the room was left with the door shut for 24 h. This procedure was repeated four times, with the position of the coloured or clear covers re-randomized for each of the four replicates. At the end of each 24 h period, the number of house flies captured on the sticky surfaces of the covers facing the window adjacent to the top and bottom chambers of each trap were counted. The mean catches for each coloured or clear trapping surface (top and bottom catches combined) were compared by ANOVA followed by Tukey&#39;s LSD test (α=0.05). 
         [0033]    In total of 161 house flies were captured, with 28, 50, 48 and 35 flies respectively captured in the four successive replicates. Of the total captured, 75% were in the bottom chambers of the traps. The mean catches (±SE) for each colour type of cover were: yellow 15.0±4.0, green 11.3±1.9, clear 8.0±3.5 and white 6.0±2.7. There was no significant difference between the mean catches (F=1.56, P=0.25). At the end of each replicate there were only 1-2 flies left free in the room, unexpectedly indicating that a large majority of the released flies were captured in the traps. 
         [0034]    These results clearly demonstrate the efficacy of the window fly trap for capturing house flies inside a building. They also indicate that the colour of the trap cover is of less significance to the flies than the light passing through the glass that draws them to a window. Along with the results of many other experiments not reported herein, the results are sufficiently promising to justify commercialization of the window fly trap. 
         [0035]    While a number of exemplary aspects and embodiments have been discussed above, those of skill in the art will recognize certain modifications, permutations, additions and sub-combinations thereof. It is therefore intended that the following appended claims and claims hereafter introduced are interpreted to include all such modifications, permutations, additions and sub-combinations as are within their true spirit and scope.