a perspective view of an exemplary trap 100 for crawling pests in accordance with the present invention is shown in fig1 . the trap 100 is suitable for trapping crawling pests such as arachnids , crawling insects such as ants and cockroaches , and the like . the trap 100 may also be used for trapping crawling pests that also have the ability to fly , such as wasps , stink bugs , or the like . the trap 100 has particular advantages for trapping pests that may have unpleasant defense mechanisms , such as stingers , biting mandibles , foul odor or the like , because the entrapped pests may be discarded without the user risking contact with the pest . the trap 100 includes a pair of parallel wall portions 102 that are elastically urged apart to define an entrapment region between the wall portions 102 . entrapment panels , for example , adhesive panels 130 , are releasably retained on the facing sides 101 of the wall portions 102 . refer also to an exploded view of the trap 100 shown in fig2 . the trap 100 includes first and second wall portions 102 . the wall portions 102 each define a recessed bed 103 with gently sloped ramps 104 , 104 ′ providing ready access to the recessed bed 103 from all sides . in this embodiment , the wall portions 102 are generally rectangular with rounded corners . tubular receivers 106 extend away from two corners of the facing sides 101 of each wall portion 102 . tubular posts 108 extend away from the facing sides 101 of the other two corners . the tubular receivers 106 define an aperture 107 that is sized and positioned to slidably receive a corresponding tubular post 108 from the facing wall portion 102 . in fig1 , for example , the tubular receivers 106 extend upwardly from the forward corners of the first or lower wall portion 102 , and the tubular posts 108 extend upwardly from the rear corners of the lower wall portion 102 . the tubular posts 108 for the second or upper wall portion 102 extend downwardly to engage the tubular receivers 108 of the lower wall portion 102 , and the tubular receivers 106 receive the tubular posts 108 from the lower wall portion 102 . the tubular posts 108 are sized and configured to be inserted into corresponding tubular receivers 106 . in this embodiment , the tubular receivers 106 include an inner rim 106 ′ at the distal end , and the tubular posts 108 include an outer rim 108 ′ at the distal end . the inwardly and outwardly disposed rims 106 ′, 108 ′ are sized such that the tubular posts 108 may be inserted into the tubular receivers 106 of another wall portion 102 with an interference fit , such that the wall portions 102 will releasably snap together . as seen in fig2 , a coil spring or other biasing element 120 is disposed in the aperture 107 in the tubular receiver 106 , and is configured to bias the upper and lower wall portions 102 apart . an annular recess 109 is defined in the wall portions 102 concentric with the corresponding tubular posts 108 . the annular recess 109 is sized to slidably receive the corresponding tubular receiver 106 on the other wall portion 102 . refer now also to fig3 , which shows a section view of the trap 100 through section 3 - 3 indicated in fig1 . the recessed bed 103 defined in each of the wall portions 102 receives a disposable adhesive panel 130 . the adhesive panels 130 are sized and configured to fit in the corresponding recessed bed 103 , and are retained on the recessed bed 103 by edge retainers 114 . at least a portion of the inwardly facing surface of the adhesive panels 130 is covered with an adhesive that is formulated to entrap crawling pests , such that pests crawling onto the adhesive portions become fixed to the adhesive panel 130 and are unable to escape . each wall portion 102 is substantially rigid . in a current embodiment , the rigidity is conveniently achieved in a lightweight and inexpensive construction by forming the wall portions 102 with a honeycomb structure , although other construction is clearly contemplated . for example , the wall portions 102 may be formed from a rigid polymeric foam or from a natural material such as wood . referring again to fig1 and 2 , each wall portion 102 includes a centrally located aperture 112 having a flexible plate 110 cantilevered along one edge of the aperture 112 such that the flexible plate 110 can be flexed inwardly , as indicated by arrow 90 . the operation of the trap 100 can now be appreciated . the wall portions 102 are typically assembled when the user obtains the trap 100 . upper and lower disposable adhesive panels 130 are placed into the recessed bed 103 of each wall portion 102 , and are retained on the bed 103 by edge retainers 114 . the trap 100 is then placed in a desired location . it should be appreciated that the trap 100 is accessible from all four sides , by the gently sloping ramps 104 . additionally , the trap 100 in this embodiment is reversible ( invertible ), and therefore the trap 100 may be flipped when one adhesive panel 130 becomes suitably filled with pests . the flat outer surfaces of wall portions 102 facilitate placement on any flat surface , for example , on a floor or counter . the entrapment region defined by the adhesive panels 130 is in the relatively narrow region between the wall portions 102 . therefore the traps 100 are unlikely to become inadvertently stuck to unintended parties , such as household pets , young children , or unwary travelers in an area containing the trap 100 . when the trap 100 is sufficiently full of pests , and typically after flipping the trap 100 to allow the second adhesive panel 130 to entrap pests 95 , the user may simply step on or otherwise urge the wall portions 102 together , which is indicated by arrows 92 in the sectional end view shown in fig4 . as the wall portions 102 are urged together against the elastic force of the springs 120 , the tubular receivers 106 are received into the corresponding annular recess 109 , and the tubular posts 108 are received into the corresponding tubular receiver 106 , to allow the inner surfaces of the adhesive panels 130 to contact each other and become adhered . the pests 95 that have become stuck to the adhesive panels 130 will thereby be crushed and / or enclosed between the panels 130 . when the closing force is removed , the wall portions 102 will separate due to the biasing force of the springs 120 . the separation of the wall portions 102 is limited by the interference between the rims 106 ′, 108 ′. at least one of the adhesive panels 130 will release from the corresponding wall portion 102 due to the adhesive attachment to the opposing adhesive panel 130 . as illustrated in the side view of fig5 , the user may then depress the appropriate flexible plate 110 from the recess 112 ( fig1 ) through the wall portion 102 to release the adhesive panels 130 , which may then be dropped directly into a suitable repository . therefore , the adhesive panels 130 in this embodiment may be removed and disposed of without the user directly touching the panels 130 . of particular note , the trap 100 allows the user to effectively crush , or otherwise immobilize , encapsulate , or enclose the pests prior to handling the trap 100 . for example , by stepping on the trap 100 , any threat from the pests ( for example , with a stinger , venom , or the like ) can be substantially neutralized , and the user does not need to worry that one or more of the trapped pests may still be active . as a further safety advantage , the user does not need to handle the adhesive panels 130 directly after stepping on the trap 100 . rather , the user may simply hold the trap 100 by the wall portions 102 wall away from the adhesive panels 130 over a receptacle , and depress one or both of the flexible plates 110 to release the panels 130 , which will drop into the receptacle . to reset the trap 100 , the user simply replaces the adhesive panels 130 in the recessed beds 130 , such that they are retained by the edge retainers 114 . the trap 100 may then be positioned in the same , or a different location . in a current embodiment of the trap 100 , the entrapment region defined between the adhesive panels 130 is between about 0 . 3 inch and 2 . 0 inch , and more preferably between 0 . 4 inch and 1 . 0 inch . one advantage of the currently preferred embodiment of the trap , as described above , is that the two wall portions 102 are identical , and the simple design requires only three unique parts , the wall portions 102 , the springs 120 , and the disposable adhesive panels 130 . although this elegant design is not necessary for the present invention , it will be readily apparent this construction provides for low manufacturing costs . in particular , the wall portions 102 each have two tubular receivers 106 and two tubular posts 108 that are symmetrically disposed on the wall portions 102 . the wall portions 102 may therefore be aligned such that the tubular receivers 106 for one wall portion align with the tubular posts 108 of the other wall portion 102 . although the disclosed trap 100 shown in fig1 is symmetric about the long axis of the wall portion 102 , it will be readily apparent that the trap may alternatively be constructed to be symmetric about the short axis , or even about the diagonal axis . it is also contemplated that the wall portions 102 do not need to be rectangular . for example , the wall portions ( and associated adhesive panels 130 ) may be formed with a circular , triangular , or polygonal plan form . advantageously , the wall portions may include symmetrically disposed receivers and posts arranged such that the wall portions are identical . alternatively , the wall portions may be not be identical . for example , it is contemplated that a trap in accordance with the present invention may be constructed with a generally triangular plan form , with tubular receivers formed on one wall portion , and tubular posts formed on the opposing wall portion . a plan view of an embodiment of an adhesive panel 130 suitable for use with the present invention is shown in fig6 a . in this embodiment the adhesive panel 130 includes a generally star - shaped adhesive portion 132 disposed on the panel 130 , wherein other portions of the panel 130 are not adhesive . although it is also contemplated that the adhesive panel may be substantially or completely covered with an adhesive , the current shape of the adhesive portion 132 is intended to provide a relatively larger perimeter 134 for the size of the adhesive panel 130 . in particular , a crawling pest entering the adhesive portion 132 becomes stuck relatively quickly . therefore the interior of the adhesive portion 132 is relatively inaccessible to crawling arthropods , and therefore ineffective for trapping crawling pests . pests trapped near the perimeter 134 not only block the adhesive portion 132 to subsequent crawling pests , but they may also deter other pests that are very near the trapped pest from entering the trap 100 . for the present invention it is preferred to provide a shaped adhesive portion 132 that provides a relatively large perimeter 134 length relative to the area of the adhesive panel 130 . a generally star - shaped pattern for the adhesive portion 132 provides a relatively large perimeter 134 , while also widely separating the adhesive elements near the outer perimeter of the panel 130 . therefore , pests are more able to enter deeply into the trap 100 before becoming stuck to the adhesive portion 132 . other exemplary large perimeter patterns for the adhesive portions 132 ′, 132 ″ are illustrated in fig6 b and 6c . on adhesive panel 130 ′, an adhesive pattern 132 ′ comprising an array of transverse triangles are applied to the panel 130 ′. on adhesive panel 130 ″, a zigzag pattern of adhesive 132 ″ is applied to the panel 130 ″. it is also contemplated that the adhesive for the adhesive panels 130 , or the panels 130 themselves , may be provided with a natural or synthetic attractant to lure a target insect or other pest into the trap . although the trap 100 described above was constructed using reusable polymeric wall portions 102 with disposable and replaceable panels 130 , a crushable , fully disposable trap 200 for crawling arthropods is shown in fig7 - 9 . in this alternative construction upper and lower adhesive panel portions are incorporated into a stiff but crushable open fiberboard or cardboard trap . this fully disposable embodiment , the trap 200 may be set out to entrap the target pest , for example , spiders , and then stepped on or otherwise crushed to encapsulate the trapped pests , thereby protecting the user from potential danger from recently - trapped pests . in fig7 the fully disposable trap 200 defines upper and lower panels 202 , each having a large perimeter adhesive pattern 232 defining non - adhesive pathways deep into the trap 200 . the adhesive pattern 232 is defined on the inwardly - facing surfaces of the panels 202 , the opposed surfaces thereby defined facing beds to define an entrapment region therebetween . the disposable trap 200 is invertible , similar to the trap 100 discussed above . in this exemplary embodiment , the adhesive portions 232 are patterned to correspond approximately to the adhesive portion 132 shown in fig6 a . it will be readily apparent that other patterns , for example those shown in fig6 b and 6c , may alternatively be used . the upper and lower panels 202 are joined and held in approximately parallel orientation by four spaced apart perimeter posts 206 , 208 ( two visible in fig7 ). therefore , the interior of the trap 200 is accessible from all sides . in this embodiment , two diagonally opposed posts 208 ( one visible ) further define opposed flap portions 208 ′ that extend from the center portion of the post 208 , and are configured to bend outwardly ( e . g ., by the user pinching the tab portions 208 ′. the tab portions 208 ′ thereby provide outwardly - extending tabs to facilitate placement and moving the trap 200 during use ( for example , flipping the trap over ), allowing the user to keep their fingers away from the interior of the trap 200 . the tab portions 208 ′ also aid in maintaining the trap 200 in the open position shown in fig7 . in a current embodiment , the trap 200 is formed from a flat panel of a stiff paperboard , although it is contemplated that other materials , such as a thin polymeric panel , may alternatively be used . paperboard ( and most thin polymeric panels ) will typically have a stiffness such that the posts 206 , 208 easily maintain the upper and lower panels 202 in the desired spaced - apart relation . in addition , the posts have an inherent elasticity in bending , such that the posts 206 , 208 will flex to elastically bias the upper and lower panels 202 apart . fig8 shows the trap 200 prior to assembly by the user , in plan - form . the flat panel 201 includes the upper and lower panels 202 , and the posts 206 , 208 . the posts 206 , 208 are scored or perforated 207 along the edges joining the upper and lower panels 202 , to facilitate folding the trap 200 . the side entryways for the trap 200 are defined by the corresponding apertures 214 . in addition , scoring or perforations 205 are optionally provided approximately on a midline of the posts 206 , 208 ( including the tab portions 208 ′). the perforations 205 facilitate the upper and lower panels 202 coming together in approximate alignment when the trap is crushed . the upper and lower panels 202 are provided with respective patterned adhesive portions 232 . it is contemplated that , for packaging , the adhesive portions 232 may be overlaid with a protective , peel - away strip ( not shown ) that would be removed by the user when initially setting up the trap 200 . an end flap 210 with an adhesive strip 212 extends from one end and is configured to fold over the opposite panel to assemble the trap 200 . therefore , to set up the trap 200 the user simply chooses a suitable location for the trap , and folds along the perforations 207 on either end of the posts 206 , 208 to define the approximately rectangular trap volume . the peel - away strips ( if present ) are removed to expose the adhesive portions 232 , and to expose the adhesive strip 212 . the adhesive strip 212 is pressed against the outer surface of the corresponding panel 202 . the user may then pinch the tab portions 208 ′ to define the outwardly - extending grips . fig9 shows the trap 200 crushed after use , which may be accomplished by simply stepping on the trap . the tab portions 206 , 208 extend outwardly , and the trapped pests are safely encapsulated between the upper and lower panels 202 , facilitating safe disposal of the trap 200 .
a reusable trap and a fully disposable trap include two opposing panels or walls , each with a patterned adhesive portion on an inner surface . the trap is configured to provide easy access to crawling pests from all sides , and the patterned adhesive portion provides non - adhesive paths deep into the trap , such that crawling pests may venture further into the trap before encountering adhesive , thereby increasing the trapping capacity . the opposed panels or walls are configured to be urged together by the user , for example by stepping on the trap , to encase trapped pests therebetween , avoiding potential harmful exposure to the user during disposal .