BACKGROUND OF THE INVENTION
Paperboard containers are commonly used to store and hold food items, particularly when such food items are to be delivered, for example through a third party delivery service. Such containers are commonly folded carton structures having a perimeter sidewall and a closable cover. Restaurants and food service providers will place the food items ordered by a customer within the container, close the cover, and provide the container to a third party delivery person to deliver the container to the customer. One problem with these containers is that there are insufficient means for preventing tampering of the container or for providing evidence that the container has been opened or tampered with prior to the delivery of the food items. As the use of third party delivery services increases, food service providers are more concerned about ensuring that the food items delivered as ordered; however, food delivery containers currently utilized do not restrict tampering with the food items prior to deliver to the customer. Accordingly, a need exists for a feature for providing evidence of tampering with a food container prior to the final delivery of food items contained therein.
BRIEF SUMMARY OF THE INVENTION
The present invention is directed to a tamper evident feature for a container that may be used to secure the container in a closed configuration and restrict access to the interior contents of the container without providing visible evidence that the container has been opened. The tamper evident feature may be used in connection with food deliver containers commonly utilized by restaurants, quick-service food providers and other food service providers; however, it is recognized that the tamper evident feature may be incorporated in to any type of container, carton or other closable vessel for any suitable application.
According to one embodiment, the tamper evident feature may include a locking tab connected to and extending from a wall panel of a container and a receiving slot provided on a cover panel of the container. The locking panel may be configured to be at least partially inserted into the receiving slot and interlock with the receiving slot in order to secure the container in a closed position.
The locking tab can include a base end portion connected to the wall panel of the container and a locking end portion extending from the base end portion. The locking end portion may include an outer terminal edge and an intermediate locking slit extending partially across the width of the locking tab at an intermediate position along its length. The intermediate locking slit may form an intermediate locking edge into the locking tab. The intermediate locking tab may include a transverse cut edge extending partially toward the outer terminal edge and an intermediate end fold line extending laterally toward the side edge of the locking tab. The formation of the intermediate locking edge may enable the locking tab to bend and fold relative to the remainder of the locking tab and form a tab end portion extending toward the outer terminal edge of the locking tab.
According to one embodiment, the receiving slot may include a receiving slit formed into the cover panel of the container. The receiving slit may form a receiving edge within the cover panel that is spaced from the front edge of the cover panel approximately the same distance that the intermediate locking edge on the locking tab is spaced form the upper edge of the wall panel. The receiving slot may further include one or more minor cut lines extending from the receiving slit.
The tamper evident feature may be enabled by folding the locking tab so that it is substantially aligned with the plane of the cover wall panel and inserting the terminal edge of the locking tab into the receiving slit of the receiving slot. The locking tab may then be further inserted into the receiving slot until the intermediate locking edge overlaps the receiving edge. The receiving edge and locking edge may then engage one another in order to interlock the locking tab and receiving slot together and restrict opening of the container. According to one embodiment, the transverse cut edges of the locking tab and the minor cut lines of the receiving slot enable the locking edge and receiving edge to interlocking in a slightly overlapping manner to restrict the locking tab from being removed from the receiving slot with deformation of the locking tab or cover panel.
Both the intermediate locking edge of the locking tab and the receiving edge of the receiving slot may have a generally conforming curved shape that enables the locking edge and receiving edge to substantially align when the locking tab is inserted into the receiving slot.
According to one embodiment, the tamper evident feature may further include a restricting slot formed into the front edge of the cover panel. The locking tab may be inserted through the restricting slot prior to being folded and inserted into the receiving slot to further restricted removal of the locking tab from the receiving slot after engagement.
Other aspects and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the accompanying drawing figures.
DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
In the accompanying drawing, which forms a part of the specification and is to be read in conjunction therewith in which like reference numerals are used to indicate like or similar parts in the various views:
FIG. 1A is a schematic plan view of a receiving slot component of a tamper evident feature for a container in accordance with one embodiment of the present invention;
FIG. 1B is a schematic plan view of a locking tab component of a tamper evident feature for a container in accordance with one embodiment of the present invention;
FIG. 2 is a schematic plan view of a blank for a container with a tamper evident feature in accordance with one embodiment of the present invention;
FIG. 3 is a plan view of a container with a tamper evident feature illustrating the container in a folded configuration in accordance with one embodiment of the present invention;
FIG. 4 is a perspective view of the container with tamper evident feature of FIG. 3 illustrating the container in an unfolded and opened configuration in accordance with one embodiment of the present invention;
FIG. 5 is a perspective view of the container with tamper evident feature of FIG. 3 illustrating the container in a partially closed configuration in accordance with one embodiment of the present invention;
FIG. 6 is a perspective view of the container with tamper evident feature of FIG. 3 illustrating the container in a closed position in accordance with one embodiment of the present invention;
FIG. 7 is a perspective view of the container with tamper evident feature of FIG. 3 illustrating the container in a fully closed configuration with the tamper evident feature fully engaged in accordance with one embodiment of the present invention;
FIG. 8 is a partial perspective view of the container with tamper evident feature of FIG. 3 illustrating the initial engagement of the tamper evident feature in accordance with one embodiment of the present invention;
FIG. 9 is a partial perspective view of the container with tamper evident feature of FIG. 3 illustrating the partial engagement of the tamper evident feature in accordance with one embodiment of the present invention;
FIG. 10 is a partial perspective view of the container with tamper evident feature of FIG. 3 illustrating the full engagement of the tamper evident feature in accordance with one embodiment of the present invention; and
FIG. 11 is a partial perspective view of the interior of the container with tamper evident feature of FIG. 10 illustrating the full engagement of the tamper evident feature in accordance with one embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
The invention will now be described with reference to the drawing figures, in which like reference numerals refer to like parts throughout. For purposes of clarity in illustrating the characteristics of the present invention, proportional relationships of the elements have not necessarily been maintained in the drawing figures.
The following detailed description of the invention references specific embodiments in which the invention can be practiced. The embodiments are intended to describe aspects of the invention in sufficient detail to enable those skilled in the art to practice the invention. Other embodiments can be utilized and changes can be made without departing from the scope of the present invention. The present invention is defined by the appended claims and the description is, therefore, not to be taken in a limiting sense and shall not limit the scope of equivalents to which such claims are entitled.
The present invention is directed to a tamper evident locking feature 10 for a container, carton, box or similar type of selectively enclosable structure. The present is also directed to a tamper evident food container 100 incorporating a tamper evident locking feature 10. Among a number of potential advantageous uses, tamper evident locking feature 10 and container 100 of the present invention may be utilized by food service providers in connection with transportation, delivery and storage of food items, and particularly with food delivery services to indicate whether a food container has been opened prior to completion of the delivery. As described herein, tamper evident locking feature 10 can be engaged with a lid or cover of a container so that the only way to open the container and gain access to the interior contents of the container is to tear or deform components of the tamper evident locking feature 10 and/or a portion of the container, each of which provides clear evidence that the container has been opened or tampered with. The engagement of tamper evident feature 10 may be hidden form sight so that it is not clearly visible that the container is locked. According to one embodiment, the engagement of tamper evident feature 10 can be achieved by pressing down and listening for an audible “click” as described in greater detail below. This can let the food operator know that the container has been closed and locked properly using tamper evident locking feature 10. According to one embodiment, tamper evident locking feature 10 can be incorporated into the layout of a container and no additional or secondary materials are needed to achieve tamper evidence. While the following description refers to one type container in which tamper evident feature 10 can be incorporated, it is recognized that tamper evident locking feature 10 may be incorporated into any suitable type of container or similar vessel of any suitable design, shape, and size.
FIGS. 1A and 1B schematically illustrate tamper evident feature 10 according to one embodiment of the present invention and incorporated into a closable container having a sidewall panel 102 and cover panel 104. FIG. 2 schematically illustrates a blank 200 for a container 100 that includes tamper evident locking feature 10 according to another embodiment. As best shown in FIGS. 1A and 1B, tamper evident feature 10 may include a locking tab 12 extending from a sidewall 102 of container 100 (see FIG. 1B) and a receiving slot 14 defined into top panel 104 of a container 100 (see FIG. 1A). As described in greater detail below, locking tab 12 may be configured to be inserted into receiving slot 14 in an interlocking fashion in order to secure sidewall 102 and top panel 104 together and the container in a closed configuration.
As shown in FIG. 1B, locking tab 12 may include a base end portion 16 and locking end portion 18. Based end portion 16 may be defined by a base edge 20 connected to sidewall 102 of the container. FIG. 1B illustrates base edge 20 connected to the container an intermediate position within sidewall 102; however, in alternative embodiments, base edge 20 may also be suitably connected to an edge of sidewall 102. According to one embodiment, base edge 20 may be removably connected to sidewall 102 by a perforated, scored or other type of weakened connection so that base edge 20 may be selectively removed from container sidewall 102. As described in greater detail below, this configuration can enable a user to open the container after tamper evident locking feature 10 has been engaged.
As shown in FIG. 1B, base end portion 12 may include base side edges 22 extending from base edge 20 and further defining the outer perimeter boundary of base end portion 10 (and locking tab 12 overall). According to one embodiment, as shown in the figures, base side edges 22 may be cut away from container sidewall 102, which may allow locking tab 12 to further flex and bend when engaging tamper evident feature 10. In alternative embodiments (not shown), base side edges 22 may be integral with or otherwise connected to container sidewall 102.
As shown in FIG. 1B, locking end portion 18 of locking tab 12 may extend from base end portion 16. As illustrated, locking tab 12 may be formed as a unitary component with locking end portion 18 and base end portion 16 integrally connected. Locking end portion 18 may include side edges 24 extending from base side edges 22 and a terminal free edge 26 extending between side edges 24 to define the perimeter boundary of locking end portion 18. The embodiment illustrated in FIG. 1B shows terminal free edge 26 having a semi-circular or curved shape that may facilitate the insertion of locking end portion 18 into receiving slot 14 as described below; however, terminal free edge 26 may have any suitable shape or configuration in alternative embodiments of the present invention.
As further shown in FIG. 1B, extending between side edges 24 at intermediate positions along the length of locking tab 12 may be first and second intermediate scored or fold lines 28 and 30. Intermediate fold lines 28 and 30 may be configured to enable flexing and bending of locking tab 12 to facilitate the engagement of tamper evident locking feature 10. According to one embodiment, first intermediate fold line 28 may be generally aligned and coextensive with the upper edge of container sidewall 102 so that locking tab 12 may be folded and generally aligned with the plane of cover panel 102 when cover panel 102 is folded down into a closed position. According to one embodiment as shown in FIG. 1B, second intermediate fold line 30 may be slightly spaced apart from first intermediate fold line 28 in the direction of terminal free edge 26 and may facilitate insertion of locking tab 12 into receiving slot 14 (shown in FIG. 1A) by allowing locking tab 12 to be orientated in a slightly downward angle.
As shown in FIG. 1B, locking end portion 18 may include an intermediate locking slit defined into and through the surface of locking tab 12 to form a corresponding intermediate locking edge 32. As shown in FIG. 1B, intermediate locking edge 32 may be intermediately located along a portion of the width of locking tab 12 between side edges 24 and between second intermediate fold line 30 and terminal edge 26. Intermediate locking slit and corresponding edge 32 may be configured as a cut, slit, incision or similar opening defined through the surface of locking tab 12. As shown in FIG. 1B, intermediate locking edge 32 may not extend across the entire width of locking tab 12 and may have a generally curved shape. As further shown in FIG. 1B, intermediate locking edge 32 may include transverse extension cut ends 34 located at each end of the curved portion of intermediate locking edge 32 and extending generally perpendicular to the curved portion of intermediate locking edge 32. As described in greater detail below, intermediate locking edge 32 (including extension cut ends 34) may function as a locking component of tamper evident feature 10 when locking tab 12 and receiving slot 14 are engaged.
As shown in FIG. 1B, locking end portion 18 may further include a fold or score end line 36 extending laterally away from each end of intermediate locking edge 32 to side edges 24 of locking end portion 18. Folding end edges 36 (along with intermediate locking slit and corresponding edge 32) can enable the locking end portion 18 to flex and pivot with respect to the remainder of locking tab 12. As further shown in FIG. 1B, locking end portion 18 may include perforated or scored tear-away lines 38 extending from transverse extension cut ends 34 (of intermediate locking edge 32) to terminal edge 26. As described in greater detail below, once locking tab 12 is engaged with receiving slot 14 to form tamper evident locking feature 10, scored tear-away lines 38 can assist in preventing locking tab 12 from being removed from receiving slot 14 without deformation of locking tab 12.
As also shown in FIG. 1B, locking end portion 18 may further include an end section 40 that may be configured to be inserted into and received by receiving slot 14 (as described in greater detail below). According to one embodiment as shown in FIG. 1B, end section 40 may one or more ribbed extensions or fingers extending away from intermediate locking edge 32 to terminal edge 26. As best shown in FIG. 1B, the perimeter end section 40 may be defined by intermediate locking edge 32 and terminal edge 26 at each end and by transverse cut ends 34 and scored tear-away lines 38 along its sides. The ribbed extensions of end section 40 may be defined into tab 12 by means of scoring, perforation, indentation, surface marking or other means and can operate to stiffen and/or strengthen locking end portion 18 to reduce bending or deformation of locking end portion 18 once tamper evident feature 10 is engaged (as described below).
As shown in FIG. 1A, receiving slot 14 of tamper evident feature 10 may be defined into the top or cover panel 104 of the container. As described in greater detail below, receiving slot 14 may be configured to fully or partially receive locking end portion 18 of locking tab 12 when tamper evident feature 10 is engaged. As such, receiving slot 14 may be located at a position within top or cover panel 104 corresponding to the approximate length and position of locking tab 12 so that locking tab 12 may be inserted into receiving slot 14 to engage tamper evident feature 10. According to one embodiment, receiving slot 14 is positioned inward from the front edge 106 of cover panel 104 at a distance approximately equal to the distance intermediate locking slit and corresponding edge 32 located on locking tab 12 extend away from a upper edge of front panel 102.
As best shown in FIG. 1A, receiving slot 14 may include a slit defined into and through the surface of cover panel 104 to form a corresponding receiving cut edge 42. As shown in FIG. 1A, receiving cut edge 42 may be intermediately positioned within cover panel 104 at a distance from the front edge 106 of cover panel 104 corresponding to the distance intermediate locking edge 32 of locking tab 12 is spaced from the upper edge of front wall panel 102 to enable end section 40 to be inserted within receiving slot 14. Receiving slit and corresponding receiving cut edge 42 may be configured as a cut, slit, incision or similar opening defined through the surface of cover panel 104.
According to one embodiment as shown in FIG. 1A, receiving slit and corresponding edge 42 may have a curved shape with the curvature extending away from the front edge 106 of cover panel 104. As described in greater detail below, the curvature of receiving slit and edge 42 may facilitate engagement of locking tab 12 with receiving slot 14. As further shown in FIG. 1A, the curvature of receiving cut edge 42 may generally correspond to and conform to the curvature of intermediate locking slit and corresponding edge 32 (of locking tab 12) as shown in FIG. 1B. This corresponding curvature between edge 42 and edge 32 facilitate an overlapping and interlocked engagement when tamper evident feature 10 is enabled after locking tab 12 is inserted into receiving slot 14. It is further recognized that the receiving slit and cut edge 42 may have a linear, curved or other suitable shape and configuration in alternative embodiments of the present invention as long as the configuration enables locking tab 12 to be at least partially inserted through receiving slot 14.
As shown in FIG. 1A, receiving slot 14 may further include one or more minor cut lines 44 extending away from receiving cut edge 42. According to one embodiment, minor cut lines 44 (along with curved edge 42), may form one or more deflecting tabs or portions 46 along the convex side of curved edge 42. During engagement of tamper evident feature 10, deflecting tabs 46 may assist in maintaining the locked engagement of feature 10 and may deflect downward and engage with intermediate locking edge 32 to further prevent locking tab 12 from disengaging from receiving slot 14.
As further illustrated in FIG. 1A, tamper evident feature 10 may also include a restraining slot 48 defined into the folded edge 106 of cover or top panel 104 of the container. As shown in FIG. 1A, folded edge 106 may form the connecting edge between cover panel 104 and a front fold flap 108 and restraining slot 48 may be generally aligned with the location of locking tab 12. Restraining slot 48 may be configured to allow locking tab 12 to be inserted therethrough prior to being inserted into receiving slot 14 and tamper evident locking feature 10 being engaged and locked as described in greater detail below. Once locking tab 12 is inserted through restraining slot 48, restraining slot 48 may function to limit the range of motion of locking tab 12 and restrict the ability to remove tab 12 from receiving slot 14 once inserted therein.
As shown in FIGS. 2 and 3, tamper evident feature 10 may be incorporated into a container 100 formed from a foldable unitary blank 200. FIG. 2 illustrates blank 200 prior being formed into container 100 according to one embodiment, while FIG. 3 illustrates container 100 formed from blank 200 and in a folded and flat configuration. As best shown in FIG. 2, container 100 may include one or more wall panels connected together at their ends, including a first or front sidewall panel 102. As further shown in FIG. 2, container 100 may include one or more cover flaps and a top or cover panel 104 connected to an upper edge of a wall panel and configured to enclose the upper portion of container 100 when formed from blank 200. As further shown in FIG. 2, container 100 may include one or more bottom panels forming a bottom end construction 110. Container 100 and blank 200 as illustrated in FIGS. 2 and 3 (as well as FIGS. 4-11) represent just one embodiment of the container 100 of the present invention and it is recognized that container 100 may have any suitable configuration utilized in enclosable carton and container structures.
As described above and also illustrated in FIGS. 2 and 3, container 100 includes tamper evident feature 10 incorporated therein. According to one embodiment, as illustrated in FIGS. 2 and 3, locking tab 12 of tamper evident feature 10 may be defined into and/or connected to first sidewall panel 102 and extend upward therefrom, while receiving slot 14 of tamper evident feature 10 may be defined into top panel 104. In addition, according to certain embodiments, container 100 may include a front fold flap 108 connected to cover panel 104 by folded edge 106, which may contain restraining slot 48 of tamper evident feature 10. Container 100 may further include additional features and/or configurations commonly found in carton and container constructions now know or hereinafter developed.
Turning to FIGS. 4-11, the use and configuration of tamper evident feature 10 and container 100 (with tamper evident feature 10 incorporated therein) according to one embodiment, is illustrated in greater detail. As shown in FIG. 4, prior to engaging tamper evident feature 10, cover panel 104 of container 100 may be freely opened and closed to provide access to the interior of container 100. As shown, prior to engagement of tamper evident feature 10, locking tab 12 freely extends from sidewall panel 102 and disengaged from linear restraining slot 48 and receiving slot 12.
As shown in FIG. 5, according to one embodiment where tamper evident feature includes linear restraining slot 48, locking tab 12 may be inserted through slot 48 provided along the fold edge 106 between top panel 104 and fold flap 108 of container 100 to begin the engagement process of tamper evident feature 10. As shown, locking tab 12 may be inserted through slot 48 and then top panel 104 of the container 100 can be fully closed to enclose and seal in the contents located within the interior volume of container 100 (see FIG. 6).
FIG. 7 illustrates container 100 in a fully closed configuration where tamper evident feature 10 has been fully engaged and container 100 is restricted from opening without providing visible evidence of tampering. As shown, locking tab 12 has been inserted through restricting slot 48, folded over and the end section 40 of locking tab 12 has been inserted through receiving slot 14 so that intermediate locking edge 32 (of locking tab 12) and receiving cut edge 42 (of receiving slot 14) are interlocked together as described in detail below with reference to FIGS. 8-11).
As shown in FIG. 8, once cover panel is fully closed, locking tab 12 may be folded downward along first intermediate fold line 28 so that it generally overlies cover panel 104. As further shown in FIG. 8, the locking end portion 18 of locking tab 12 may be aligned with and inserted into receiving slot 14. When inserting locking tab 12 into receiving slot 14, the terminal edge 26 and ribbed end section 40 of locking end portion 18 may be pushed through receiving slit and cut edge 42 (of receiving slot 14) defined into cover panel 104. As shown in FIG. 8, locking tab 12 may be partially bent or folded along second intermediate fold line 30 and/or fold end lines 36 (adjacent intermediate locking edge 32) to facilitate inserting end section 40 into receiving slot 14 by allowing locking end portion 18 of locking tab 12 to have a slight downward angled orientation.
As shown in FIGS. 9-11, in order to fully engage tamper evident feature, locking tab 12 may be inserted into receiving slot 14 until terminal edge 26 and ribbed end section 40 is inserted past receiving cut edge 42 and fully through receiving slot 14. Once terminal edge 26 and ribbed end section 40 are fully inserted through slot 14, intermediate locking edge 32 on locking tab 12 may align with be positioned just beyond receiving cut edge 42 of receiving slot 14 (as best illustrated in FIGS. 10 and 11). According to one embodiment, as shown in the figures, receiving slot 14 may be positioned within cover panel 104 so that the distance from the apex of receiving cut edge 42 (of receiving slot 14) to linear restraining slot 48 (defined into the folded edge 106 connecting cover panel 104 and front fold flap 108) is approximately equal to and/or slightly less than the distance between the apex of curved intermediate locking edge 32 and first intermediate fold line 28 of locking tab 12. This can configuration can enable tamper evident feature 10 to securely lock by allowing locking tab 12 to be inserted into receiving slot 14 so that intermediate locking edge 32 of locking tab 12 extends just beyond receiving cut edge 42 of receiving slot 14. As described above, intermediate locking edge 32 may also generally conform in shape and curvature to receiving cut edge 42 of receiving slot 14 so that when end section 40 of locking tab 12 is fully inserted within receiving slot 14, intermediate locking edge 32 and receiving cut edge 42 are substantially aligned and the entirety of intermediate locking edge 32 may be positioned just beyond receiving cut edge 42.
As best shown in FIG. 10, once locking tab 12 is partially inserted through receiving slot 14, the terminal edge 26 and ribbed end section 40 located along the outer portion of locking tab 12 are positioned underneath top panel 104 of container 100 an no longer accessible from the exterior of container 100. When locking tab 12 is fully inserted through receiving slot 14, intermediate locking edge 32 on locking tab 12 may be positioned below and engage with the receiving cut edge 42 of receiving slot 14. The engagement may be enabled and facilitated by the configuration of transverse cut ends 34 extending from intermediate locking edge 32 on each end of intermediate locking edge 32, which allow intermediate cut edge 32 to deflect downward and slide past receiving cut edge 42 of receiving slot 14.
According to this embodiment, when locking tab 12 is first inserted to receiving slot 14, locking tab 12 may be positioned in a first engagement position where intermediate locking edge 32 is pushed forward just beyond receiving cut edge 42 of receiving slot 14. Locking tab 12 may then be pressed downward into a second engagement position where intermediate locking edge 32 is positioned slightly below or under receiving cut edge 42 of receiving slot 14. Finally, locking tab 12 may slightly retract from the forward position into a third engagement position where intermediate locking edge 32 (and the edge of end section 40) is located underneath and just prior to receiving cut edge 42 of receiving slot 14.
As described above, transverse cut ends 34 of intermediate locking edge 32 enable intermediate locking edge 32 (and the edge of end section 40) to move from the second engagement position to the third engagement position by providing a slot or opening at each end of the curved portion of intermediate locking edge 32 to partially receive receiving cut edge 42 of receiving slot 14. In accordance with this configuration, intermediate cut edge 32 slides slightly beyond receiving cut edge 42 when end section 40 of locking tab 12 is fully inserted into receiving slot 14, and then subsequently slides or retracts backward with intermediate locking edge 32 (and the edge of end section 40) being positioned underneath receiving cut edge 42 (and cover panel 104) as transverse cut ends 34 slightly receive receiving cut edge 42.
According to one embodiment, once locking tab 12 is fully inserted into receiving slot 14 and intermediate locking edge 32 of locking tab 12 is positioned just beyond receiving cut edge 42 of receiving slot 14, a downward pressure may be applied to receiving slot 14 (along the concave side of receiving cut edge 42) which can cause intermediate cut edge 32 of locking tab 12 to slide below and engage with receiving cut edge 42 to fully lock and engage tamper evident feature 10.
FIG. 11 illustrates an interior view from the interior of container 100 after locking tab 12 has been fully engaged with receiving slot 14. As described above, after partially inserting locking tab 12 through receiving slot 14, locking tab 12 can be continued to be pressed through slot 14 until intermediate locking edge 32 of locking tab 12 is approximately aligned with receiving cut edge 42 of receiving slot 14 on top panel 104 (i.e., the first engagement position). Once aligned, a downward force or pressure can be applied to the curved receiving slot 14 which can cause intermediate cut edge 32 of locking tab to move below (i.e., the second engagement position) and then engage with receiving cut edge 42 (i.e., the third engagement position). When transitioning from the second engagement position to the third engagement position, minor cut lines 44 on receiving slot 14 may also engage the transverse cut ends 34 extending toward terminal edge 26 of locking tab 12 as best illustrated in FIG. 11. This process of applying the downward force or pressure on curved receiving slot 14 may also result in an audible “clicking” sound that can notify a food operator that locking tab 12 and receiving slot 14 of the tamper evident feature 10 have been interlocked and engaged.
Once the locking tab 12 is fully engaged with the receiving slot 14 (and intermediate locking edge 32 is engaged with receiving cut edge 42 of receiving slot 24), locking tab 12 may be restricted from disengaging with receiving slot 14 without tearing or deforming locking tab 12 and/or receiving slot 14. According to one embodiment, scored tear-away lines 38 extending from the transverse cut ends 34 of intermediate locking edge 32 to terminal edge 26 of locking tab 12 provide points or lines of weakness when locking tab 12 is attempted to be disengaged from receiving slot 14 after tamper evident feature 10 is enabled. In the event a user attempts to remove locking tab 12 from receiving slot 14, the intermediate locking edge 32 (including cut ends 34) become further interlocked with receiving cut edge 42 of receiving slot 14. This interlocking engagement between intermediate locking edge 32 and receiving cut edge 42 restricts locking tab 12 from exiting receiving slot 14 unless sufficient force is applied to scored tear-away lines 38 and ribbed end section 40 is separated from the remainder of locking tab 12. This has the effect of creating a tamper evident indicator if container 100 is opened after the tamper evident locking feature has been engaged.
From the foregoing, it will be seen that this invention is one well adapted to attain all the ends and objects hereinabove set forth together with other advantages which are obvious and which are inherent to the structure. It will be understood that certain features and sub combinations are of utility and may be employed without reference to other features and sub combinations. This is contemplated by and is within the scope of the claims. Since many possible embodiments of the invention may be made without departing from the scope thereof, it is also to be understood that all matters herein set forth or shown in the accompanying drawings are to be interpreted as illustrative and not limiting.
The constructions described above and illustrated in the drawings are presented by way of example only and are not intended to limit the concepts and principles of the present invention. Thus, there has been shown and described several embodiments of a novel invention. As is evident from the foregoing description, certain aspects of the present invention are not limited by the particular details of the examples illustrated herein, and it is therefore contemplated that other modifications and applications, or equivalents thereof, will occur to those skilled in the art. The terms “having” and “including” and similar terms as used in the foregoing specification are used in the sense of “optional” or “may include” and not as “required”. Many changes, modifications, variations and other uses and applications of the present construction will, however, become apparent to those skilled in the art after considering the specification and the accompanying drawings. All such changes, modifications, variations and other uses and applications which do not depart from the spirit and scope of the invention are deemed to be covered by the invention which is limited only by the claims which follow.
Patent Application
20200017254
