Patent Publication Number: US-7909198-B2

Title: Tamper evident enclosure for the storage and transport of bank notes

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation-in-part of U.S. patent application Ser. No. 10/362,900 filed Feb. 25, 2003, which was a §371 National Phase application of PCT/GB01/03831, filed Aug. 28, 2001, and the entirety of both applications is herein incorporated by reference. 
    
    
     This invention relates to a tamper-evident enclosure for the storage and transport of bank notes. 
     Typically, at a point of sale such as a cashier&#39;s desk in a supermarket, a container is suspended beneath the desk for the intermittent reception of wads of bank notes. It may be used to store notes as they are taken from customers, but more usually it acts as an “overflow” for the till on top of the desk. When the pile of notes of a particular denomination in the till reaches a given level it is transferred to the container, which offers better security than the till. Periodically the loaded containers are taken by security personnel to a bank, or more usually they are taken by the staff to a central counting room, where the money is counted and bagged for transport to the bank. 
     Containers currently in use are rigid boxes which slide into and out of guides beneath a counter whereby they are supported. Provision is normally made for locking them in position. The front face of a container is upwardly inclined and has an exposed top opening through which a wad of notes can be inserted. Behind the inclined front face is a barrier with a central, vertical slot. A plunger mechanism hinged near the bottom of the barrier can be manipulated, when notes have been inserted, to push them through the slot into the body of the container. 
     Containers of this kind have numerous drawbacks. They are expensive to produce and are not adequately tamper proof. Money behind the slotted barrier is still accessible through the opening and can be “fished” using, for example, adhesive tape. The relatively clumsy plunger mechanism can trap fingers and damage nails. 
     An object of one aspect of the present invention is to improve upon current arrangements and to provide a more tamper-proof apparatus which is nevertheless easy to use with less danger of injury. 
     Security firms are reluctant to handle the rigid containers and require the money to be taken out of them and bagged before they will transport it to the bank. This places considerable demands on the staff of the counting room, which is not justified by any real need that the money should be manually counted before it is taken away. Even if a security firm can be persuaded to take the containers they present transport and storage problems because of their bulk and rigidity, and as they are too expensive to be disposable there is the additional problem of their return. 
     The present invention proceeds from the recognition that it is an unnecessary expense to employ a rigid container. No container, however strong, will withstand a determined attempt to breach it. All that is in practice necessary is to be able to determine immediately and with certainty that a breach has occurred so that the culprit can be identified. 
     In accordance with the present invention there is provided a tamper-evident enclosure for the storage and transport of bank notes, the enclosure comprising a frame spanned by a flexible material, the frame having parallel sides provided with flanges under which side edges of a cover plate may be received, whereby the cover plate can be slid under the flanges to close the frame, a leading end of the cover plate being provided with a tongue which enters a correspondingly shaped, hollow formation at the leading end of the frame as the cover plate fully closes the frame and latch means to prevent withdrawal of the tongue from said hollow formation once received therein. 
     The tongue may be breakable and said hollow formation can be bent down and the arrangement may be such that the cover plate can be removed by continued movement in the same direction once the tongue is broken and bent down with the hollow formation. 
     Said latch means may comprise rearwardly and outwardly extending fins on the lateral edges of the tongue which will be deflected as the tongue enters said hollow formation to prevent withdrawal of the tongue therefrom. The hollow formation is preferably of a material soft enough to be bitten into by the fins if an attempt is made to withdraw the tongue from the hollow formation. 
     Alternatively the latch means may comprise opposite saw-tooth formations on the frame and on the cover plate which, when mutually engaged, ensure that the cover plate can be slid relative to the frame only in one direction. Said saw-tooth formations are preferably under the flanges of the frame and on said side edges of the cover plate. 
     Said flexible material may be an elasticated material. 
     The frame may be adapted to be snap-fitted into the top of an open-topped container which is locatable in a housing, the container being held in the housing by a catch which is disengaged by the cover plate as the latter fully closes the frame. 
     There may be hinged to parallel sides of the frame flaps biased to remain in a co-planar attitude, stop means being provided to prevent said flaps rising above the frame, said flaps being deflectable to allow passage of one or more bank notes to be bagged in the flexible material. 
     End edges of the flaps may have protrusions which are forced past the adjacent end member of the frame as one or more bank notes are pushed through the frame, the protrusions engaging the underside of said end member to prevent the flaps rising from the frame when the pushing force is relieved. 
    
    
     
       Preferred embodiments of the present invention will now be described by way of non-limitative example with reference to the accompanying drawings, in which: 
         FIGS. 1-3  are respectively an underside view, a top view and a side elevation of the disposable bag and its frame; 
         FIGS. 4-5B  illustrate the cooperation between the bag frame and a closure plate; 
         FIGS. 6-7B  illustrate how the bag frame is seated in its container,  FIGS. 7A and 7B  showing on a larger scale how a detail of the bag frame works; 
         FIGS. 8-12  illustrate the insertion of a closure plate to seal a full bag, simultaneously releasing the container so that it can be withdrawn, the positioning of a new frame in the container and its re-insertion into the housing, and 
         FIG. 13  illustrates a modification in which saw-tooth formations in the channels and on side edges of the frame are dispensed with, but the tongue has fins which will prevent its withdrawal from the hollow formation of the frame after insertion. 
     
    
    
     The tamper-evident enclosure for the storage and transport of bank notes of the present invention is intended primarily, but not exclusively, for use in connection with the apparatus disclosed in our co-pending U.S. patent application Ser. No. 10/362,900 proceeding from International Patent Application No. PCT/GB01/03831 published as WO 02/019289. Reference is made to that publication for a clearer understanding of the present invention. Briefly, bank notes are placed in a tray  13  which is then slid through a slot into a box like housing  10  (see  FIGS. 8 and 9 ). A lever  15  is then operated to cause a plunger to move the banknotes through the openable bottom of the tray into a storage facility  12 . When this is full it can be removed through a lockable door in the front face of the housing  10 . 
     In accordance with the present invention the container  12  ( FIGS. 6 and 7 ) has snap-fitted into its open top a frame  107  across the underside of which is stretched a piece  108  of elasticated material. The frame  107  has hinged lateral flaps  21 A, 22 A which do not extend fully across the frame  107 . After deflection downward into the carrier  12  by the plunger the flaps  21 A, 22 A will tend to resume the co-planar attitude under the influence of the elasticated material  108 . 
     When the lever  15  is depressed ( FIGS. 3 and 4 ) the plunger presses down on any note or notes in the tray, causing the flaps of the tray, as well as the flaps  21 A and  22 A, to deflect downwards. Once the note has passed the flaps  21 A, 22 A it will spread out so as to be caught behind the flaps  21 A, 22 B of the frame  107 . When the lever  15  is now raised again the flaps  21 A, 22 A spring back to the co-planar attitude as they cease to be deflected by the rising plunger  17 . The cycle can now be repeated until the distended “bag”  108  can accept no more notes. 
     To remove the full bag  108  from the housing  10  its door is opened. At this point however the container  12  on which the frame  107  is mounted cannot be pulled out of the housing. When the container  12  was pushed into the housing projections  112  at the back of the container first lifted and then engaged with respective catches  113  at the back of the housing ( FIGS. 8 and 9 ). To enable removal of the container  12  from the housing first a closure plate  111  must be slid under L-shaped flanges  114  and  114 B along the sides of the frame  107  until chamfered projections  115  and  116  at the leading end of the closure plate  111  lift the catches  113  out of the openings of the projections  112  ( FIG. 11 ). The container  12  can now be removed from the enclosure ( FIG. 12 ), after which the frame  107 , together with the bag  108  and the cover plate  111 , is removed from the carrier  12 . A new frame  107  with stretched material  108  can now be snap fitted into the top of the container  12  ( FIG. 8 ) and as the latter is slid back into the housing the openings in its projections  112  re-engage the catches  113 . 
     By this arrangement the frame  107  must be sealed by a cover plate  111  before it can be removed from the housing. With the door open and before inserting a cover plate  111  there is insufficient space above the container  12  to enable notes to be “fished” out of the bag  108 . The notes are in any event in compression between the material  108  and the undersides of the flaps  21 A, 22 A of the frame  107 . 
     After removal from the container  12  the notes within the “bag”  108  are fully sealed by the cover plate  111  which closes the frame  107 . Hooks  114 A at the back of the cover plate  111  extend over the rear edge of the bag  108  and will have to be broken if the latter is pulled away from the frame  107  to gain access to the notes within the bag. 
     As shown in  FIGS. 4 and 5  the sides of the cover plate  111  and the interiors of the channels formed by the flanges  113  and  114  of the frame  107  have reverse saw-teeth formations  200  and  201  such that the cover plate  111  can only move relative to the frame  107  in the direction indicated by the arrow “A” in  FIG. 5 . As the cover plate  111  slides into its final position closing the frame  107 , and lifting the catches  113  by means of the projections  115 , 116 , a tongue  117  at the leading end of the cover plate  111  enters a correspondingly shaped, hollow formation  118  at the leading end of the frame  107 . Therefore the cover plate  111  cannot be removed from the frame  107 , by further movement in the direction of arrow A, until the tongue  117  has been snapped off, the formation  118  being flexible and bending down to allow passage of the cover plate. Meanwhile if any of these tamper-proofing items  114 A,  117 , 118  have been damaged there will be visible evidence that an attempt has been made to remove money from the bag  108 . Damage to the bag  108  itself would of course also be indicative of theft. 
       FIGS. 7-7B  illustrate a feature of the flaps  21 A, 22 A of the frame  107 . Each flap has at one of its end edges at a position spaced from the hinged side of the flap a rounded protrusion  135  which normally rests in a recess  136  in the adjacent end member of the frame  107 . The first time the plunger depresses the flaps  21 A, 22 A the protrusions  135  pass below the recesses  136 . When the plunger  17  is retracted and the flaps  22 A, 22 B are moved back toward the horizontal by the elasticity of the bag  108  they are stopped by the protrusions  135  encountering the chamfered undersides  136 A of the recesses  136 . Thus there is no possibility that the flaps  22 A, 22 B will rise above the horizontal, which could prevent the subsequent insertion of the closure plate  111  into the channels on either side of the frame  107 . 
     In the modification illustrated in  FIG. 13  the saw-tooth formations  200  and  201  are dispensed with. Until the tongue  117 A enters the hollow formation  118 A the closure plate  111 A can be slid under the flanges  114 C and  114 D in both directions, but as the tongue  117 A enters the hollow formation  118 A rearwardly and outwardly extending fins  202  on opposite lateral edges of the tongue  117 A are deflected and will dig into the interior surface of the hollow formation  118 A if an attempt is made to pull back the closure plate  111 A contrary to the closing direction of the arrow A′. The fins  202  are flexible and preferably have sharp distal end edges. The material from which the hollow formation  118 A is fabricated is preferably soft enough to be dug into by the fins  202 . With the tongue  117 A inside the hollow formation  118 A, therefore, it is not possible to withdraw the closure plate  111 A contrary to the arrow A′. To remove the closure plate  111 A it is necessary to bend down the hollow formation to the position illustrated in  FIG. 13 , breaking off the tongue  117 A in the process.