in the drawings where like numerals indicate like elements , fig1 shows a container according to the present invention which is generally designated by reference numeral 10 . the container 10 is preferably formed or molded from a suitable plastic material or metal . although container 10 shown in fig1 has a preferred substantially rectangular shape , it should be understood that the container is not limited to this particular shape . container 10 includes a cover 12 and a base 14 . cover 12 and base 14 are pivotably connected at their respective rear edges 16 and 18 by a hinge mechanism 19 . the construction and arrangement of hinge mechanism 19 , which will be described in greater detail hereafter , permits cover 12 to pivot between an open position , as shown in fig1 for example , and a closed position , as shown in fig1 , for example . container 10 further includes a suitable closure mechanism for securing cover 12 in removable engagement with base 14 when the cover is in the closed position . as shown in fig2 the closure mechanism is preferably a latch assembly including a latch member 20 and a mating engagement slot 21 provided at respective front ends 22 and 24 of cover 12 and base 14 . it should be understood , however , that other suitable conventional closure mechanisms may be utilized to secure cover 12 to base 14 , for example , a push - button assembly , a friction fit assembly , or a magnetic assembly . as depicted in fig1 and 2 , base 14 has an interior surface 26 and an exterior or bottom surface 28 . an opening 30 is provided completely through base 14 and is defined by perimeter walls 31 . opening 30 is sized to accommodate a preselected amount of product , such as , for example , a cosmetic product 32 , as will be described in greater detail hereafter . additionally , as best shown in fig2 interior surface 26 of base 14 may include one or more recessed compartments or wells such as well 34 for housing additional items such as , for example , a product applicator or brush 35 shown in fig4 and 6 . although opening 30 and well 34 shown in fig1 each have a preferred elongated oval shape extending transversely across base 14 , it should be understood that the opening and the well are not limited to this particular shape . cover 12 has an interior surface 36 and an exterior or top surface 37 . as best shown in fig2 a preferred raised area 38 having a surface 39 and defining perimeter walls 40 extends from interior surface 36 . raised area 38 has a size and shape that sufficiently corresponds to the size and shape of opening 30 to enable the raised area to engage the opening . desirably , when cover 12 is closed against base 14 , raised area 38 extends a sufficient distance into opening 30 such that perimeter walls 40 of area 38 abut against perimeter walls 31 of the opening to form a seal at the opening . although it is preferred to utilize raised area 38 to sealingly engage opening 30 , it should be understood , however , that other suitable sealing mechanisms , such as , for example , valve or gasket type seals , may be employed to seal interior surface 36 of cover 12 with respect to opening 30 . as indicated above , cover 12 and base 14 are pivotably connected at their respective rear edges 16 and 18 by a hinge mechanism . when closed , cover 12 and base 14 are compressively loaded by virtue of the construction of the hinge , the cover and base construction , and the latch . it should be understood that the compressive force results from the height of the hinge being less than the overall height of container 10 . more particularly , when cover 12 is closed against base 14 and latched thereto , a compressive force is created as a result of the hinge being pulled to accommodate the height difference . referring now to fig7 , and 9 , a preferred hinge mechanism 19 includes one or more spaced apart curved protrusions 42 extending from interior surface 36 of cover 12 proximate to rear edge 16 of the cover . curved protrusions 42 engage corresponding spaced apart transverse slots 44 in base 14 proximate to rear edge 18 . slots 44 , also depicted in fig1 extend completely through base 14 and open into corresponding spaced apart cavities or undercuts 46 formed in bottom surface 28 . as cover 12 is articulated against base 14 in the operation of closing container 10 ( fig7 and 8 ), protrusions 42 engage slots 44 and curve about rear edge 18 of the base ( fig8 ) to lock under and against the rear edge ( fig9 ). the combined effect of this preferred hinge arrangement and the height difference between the hinge and the overall height of the container is to compressively load the cover and base when the cover is latched closed . although not depicted in the drawings , it should be understood that protrusions 42 and corresponding slots 44 may be positioned outside of the side walls of the cover and base on extensions of respective rear edges 16 and 18 which extend laterally beyond the side walls of the cover and base . while not required , it is desirable to provide a living hinge 48 to connect cover 12 and base 14 in the regions between adjacent slots 44 , as best shown in fig7 . also , it should be understood that a conventional pin hinge or other suitable hinge may be employed in lieu of living hinge 48 . in the absence of living hinge 48 or other suitable hinge , compression is produced by protrusions 42 engaging corresponding slots 44 and base undercuts 46 . in an alternative embodiment depicted in fig1 and 11 , the hinge mechanism may take the form of a substantially planar flexible connector 50 joining rear edge 16 a of top surface 37 of cover 12 to rear edge 18 a of bottom surface 28 of base 14 . the flexible connector may extend along a portion of or substantially the entire length of container 10 . a compressive force closing cover 12 against base 14 ( fig1 ) results from the height of connector 50 being less than the overall height of container 10 . fig1 , 13 , and 14 depict another embodiment of a hinge mechanism employing an alternative flexible connector 52 . flexible connector 52 joins rear edge 16 a of top surface 37 of cover 12 to rear edge 18 a of bottom surface 28 of base 14 . flexible connector 52 includes one or more spaced apart , preferably hemispherical , projections 54 extending therefrom in registration with corresponding receiving slots or undercuts 56 defined in bottom surface 28 of base 14 . projections 54 engage undercuts 56 when cover 12 is closed against base 14 . with reference to fig1 , 13 , and 14 , as cover 12 is pivoted against base 14 in the operation of closing container 10 ( fig1 and 13 ), projections 54 engage undercuts 56 , and a medial region 58 of connector 52 abuts against rear edge 18 of the base ( fig1 ). cover 12 pivots about rear edge 16 a to abut against flexible connector 52 ( fig1 ). the combined effect of this hinge arrangement and the height difference between the height of the flexible connector and the overall height of the container is to compressively load the cover and base when the cover is latched closed . although not indicated in the drawings , it should be appreciated that the foregoing hinged container constructions according to the present invention may have application with respect to containers other than cosmetic containers in which the mechanisms for closing the container constitute the entire container . for example , the hinged constructions according to the present invention may be employed on the neck of a larger separate container such as a shampoo bottle or the like . fig3 and 5 illustrate the operation of filling container 10 with a preselected amount of product , such as cosmetic product 32 . as shown in fig3 the filling of container 10 with product 32 is preferably accomplished by first applying the product to a surface 60 of a separate seal 62 such as an adhesive label or plastic sheet . seal 62 is then adhered or otherwise affixed to bottom surface 28 of base 14 of closed container 10 such that the seal completely covers opening 30 and the product is introduced into and sealed in the opening in the space between the seal and surface 39 of raised area 38 of cover 12 . it should be understood that a substantially airtight seal is effected in container 10 by virtue of the construction and arrangement of cover 12 and base 14 as discussed in detail above , and the sealing of opening 30 . alternatively , as depicted in fig5 the filling of container 10 with a preselected amount of product 32 may be accomplished by first applying the product through opening 30 in bottom surface 28 of base 14 of the closed container directly onto surface 39 of raised area 38 which is exposed through the opening . opening 30 is then covered with separate seal 62 to hold the product in the space between seal 62 and surface 39 of raised area 38 . the sealing of opening 30 in conjunction with the construction and arrangement of cover 12 and base 14 as discussed above achieves a substantially airtight seal in container 10 . it should be appreciated that base 14 can be provided with more than one opening to accommodate a plurality of product samples in a single container 10 . opening cover 12 of container 10 exposes product 32 for use . as shown in fig4 and 6 , the surface onto which product 32 was applied during filling of container 10 is the surface from which the product may be withdrawn for use . as discussed above , a preferred method of filling container 10 with a preselected amount of product 32 involves applying the product to surface 60 of seal 62 and then adhering the seal to bottom surface 28 of base 14 of closed container 10 such that the seal covers opening 30 and the product is sealed in the opening in the space between the seal and surface 39 of raised area 38 of cover 12 . as illustrated in fig4 as a result of this operation , product 32 resides on surface 60 of seal 62 in opening 30 and may be withdrawn therefrom ( e . g ., by brush 35 ) when cover 12 is opened to expose the product . an alternative method of filling container 10 with product 32 as discussed above involves applying the product through opening 30 in bottom surface 28 of base 14 of the closed container directly onto surface 39 of raised area 38 ( which is exposed through the opening ) and then covering the opening with seal 62 to seal the product in the space between the seal and the surface of the raised area . as illustrated in fig6 as a result of this operation , product 32 resides on surface 39 of raised area 38 and may be withdrawn therefrom ( e . g ., by brush 35 ) when cover 12 is opened to expose the product . in summary , it should be appreciated that the various embodiments of the present invention provide a substantially airtight product container having a novel construction that may be filled with product in an easy and efficient fashion . it will thus be seen that the objects set forth above , among those made apparent from the preceding description , are efficiently attained and , since certain changes may be made in the above constructions without departing from the spirit and scope of the invention , it is intended that all matter contained in the above description and depicted in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense . it is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the invention which , as a matter of language , might be said to fall therebetween .
a container adapted to seal the internal contents against exposure to the external environment when not is use includes a cover hingeably coupled to a base and a latch closure mechanism . at least one opening extends completely through the base . the interior surface of the cover is adapted to sealingly engage the opening in the base when the cover is pivoted against the base . a separate seal is provided to cover the opening at the bottom surface of the base to hold product within the opening between the interior surface of the cover and the seal .