The present disclosure relates to a package including the combination of a container and an overcap or closure lid structure. The overcap is formed for sealing an opening defined by a rim within a container. Preferably, the overcap includes structures providing taper evidence for the container.
Containers have been used for a variety of products, including food products, cleaning products, etc. Containers may be constructed of any number of materials. One container example includes a composite body portion and a lip or rim, with the material rolled to form a peripheral bead adjacent an external sidewall. A closure lid or overcap may further be provided for closing the container opening. In an alternative example, the containers rim may include an end ring, fixed to the container body and forming a retaining bead.
Container overcaps typically fit over the container top end or opening. The overcap serves many functions including, but not limited to, protecting the top of the container from damage, preventing or deterring unwanted access into the container, maintaining the product within the container and preventing spilling, helping to improve stacking of the containers, and increasing the useful life of the product after opening.
Overcaps may also be provided with means for deterring tampering with the container contents prior to use by a consumer and/or may be provided with means for indicating that tampering may have occurred.
U.S. Pat. No. 5,538,154 to Von Holdt shows a snap-on, flexible lid having spaced panel portions on the sidewall flange of the lid having inwardly projecting structures that are positioned to engage the bead of the container rim. Vertically aligned tear lines are provide on the side edges of the panel portions for separation of the panels from the remainder of the lid flange for ease of flexing the panel portions away from engagement with the container bead.
U.S. Pat. No. 4,934,554 to Edwards shows a tamper evident lid structure having an outer ring attached to the sidewall flange of the lid. The tamper evident portions are provided at various locations within an inverted u-shaped channel. The ring is provided with a hook member and includes a barb for retention on the bead of the container rim. An opening in the sidewall is provided at the location of the hook member. The ring may be removable by a tearing action, which also removes the hook members.
U.S. Pat. No. 7,918,360 to Mengeu et al shows a container and overcap combination for a microwavable container, wherein the overcap includes a skirt portion having at least one flexible member therein for releasable engagement with a bead on the rim of the container. The members may be flexed outwardly to release engagement with a bead on the container. An opening is provided in the top of the skirt portion, adjacent each member, providing access to the flexible member.
U.S. Pat. No. 6,899,245 to Nelson shows a tamper resistant container lid having a band surrounding the container bead engagement structures. The band forms a tear strip and is separated into a plurality of spaced tabs having spurs formed on the inside, inwardly directed surfaces. Removal of the band separates the spurs and exposes a bead engagement structure on the lid.
U.S. Pat. No. 4,281,774 to Mumford shows a tamper evident snap-on cap having an outer skirt for engagement of a beaded rim on a container and an integral tear strip for tamper evidence. An inwardly positioned annular wall forms a plug for engagement with the interior surface of the container rim.
In one aspect of the present invention, a closure lid is defined for use in covering a container having opening defined by a peripheral rim, an external sidewall and an outwardly projecting peripheral bead. The closure lid includes a body formed to cover the container opening. Multiple projecting portions extend from a periphery of the body. The projecting portions are spaced from one another around the periphery of the body with each projecting portion adapted to surround a portion of the container rim and a corresponding portion of the bead. A ring is frangibly connected to the plurality of projecting portions. The ring is adapted to surround container rim. Multiple retaining fingers or tabs are spaced from one another and are interleaved within the spacing between adjacent projecting portions. The fingers project inwardly from the ring and are formed to engage the external sidewall of the container and the bead associated with the container rim. The engagement of the fingers with the container is visible through the spacing between the projecting portions. The engagement of the fingers is removed upon the frangible disconnection of the ring from the projecting portions.
In a further aspect of the closure, the projecting portions may include, on an inwardly facing surface thereof, an inwardly projecting ridge for engaging the bead portion of the container rim. The projecting portions may be curved and further may be formed for wrapping around the container rim.
In a further aspect of the closure lid, the body may be formed for contacting the internal sidewall of the container rim. The body may include a measuring well having a defined volume for measuring product stored within the container. The measuring well is preferably formed on an inside surface of the body. Further, an inner wall may be provided as part of the closure body for engagement with an internal sidewall of the container rim. The measuring well may be spaced inwardly from the inner wall and may include a plurality of sidewalls. The sidewalls may create the well with a rectangular profile. Two of the opposing sidewalls of the rectangular profile of the measuring well may formed so as to be spaced inwardly from the inner wall at a greater distance than the other two opposing sidewall portions of the rectangular profile.
In a further aspect of the closure lid, the inner wall portion of the body may be formed with a nesting shoulder that is dimensioned to receive a corresponding nesting shoulder of a second lid for the purpose a stacking of two or more lids. Further, a stacking ridge may be formed on an upper surface of the lid for retaining a secondary package stacked on an upper surface of the lid. The stacking ridge is preferably formed by a plurality of ridge members, with the individual ridge members being positioned on a corresponding projecting portion.
In a further aspect of the closure lid, the body portion may be formed with a substantially planer surface. The body surface extends over the opening and is preferably dimensioned to overlap at least a portion of the container rim.
In a further aspect of the present disclosure, a package is defined from the combination of a container and a closure lid. The container includes an opening providing access to an interior volume of the container. The container opening is preferably defined by an upstanding peripheral rim. The closure lid preferably covers the container opening when engaged on the peripheral rim on the container. The lid includes a body portion formed to cover the container opening and a rim engagement structure. The engagement structure may include a plurality of projecting portions formed to engage the rim and to removably retain the lid in a covering relation with the container opening. A ring is frangibly affixed to projecting portions and encircles the rim of said container. A plurality of tamper-evident tabs project from an inside surface of the ring. The tabs are angled inwardly from the ring and extend a sufficient distance so as to engage the container rim. The tabs are spaced from one another and are interleaved within the spaces between the projecting portions. The tabs are positioned such that the tab and container rim engagement is visible through the spacing of the projections and the tabs form a tamper-evident assembly.
In a further aspect of the package, the container rim includes an outwardly projecting bead on its periphery. The projecting portions may further include an inwardly facing surface, said surfaces each having an inwardly projecting ridge for engaging the bead portion of the container rim. The projecting portions are preferably curved and wrap over the container rim.
In a further aspect of the package, the tabs are formed to project into a contacting engagement with an underside surface of the projecting bead on the container rim. The rim portion of the container may further define an internal sidewall. A well may be formed on one surface of the lid body, with the well having a defined volume for measuring product stored within the container. The well may further be formed on an inside surface of the lid body.
In a further aspect of the package, the lid body may include an inner wall formed for engagement with the internal sidewall of the container rim. The measuring well may be formed in an inwardly spaced relation to the inner wall. The measuring well may further include a plurality of sidewalls formed in a rectangular profile. The two opposing sidewalls of the rectangular profile of the measuring well may be spaced inwardly from the inner wall at a greater distance than the other two opposing sidewall portions of the rectangular profile.
In a further aspect of the package, a stacking ridge may be formed on an upper surface of the lid for retaining a secondary package stacked on an upper surface of the lid. The stacking ridge is preferably formed by a plurality of ridge members, with the individual ridge members formed on a corresponding projecting portion. An inner wall portion of the body of the lid may further form a nesting shoulder, dimensioned to receive a corresponding nesting shoulder on a secondary lid for a stacking of the lids. Alternatively, the lid body may form a substantially planer surface that extends across the container opening and the overlaps with at least a portion of the container rim.
Other features of the present invention and combinations of features will become apparent from the detailed description to follow, taken in conjunction with the accompanying drawings.
For the purpose of illustrating the invention, the drawings show one or more forms that are presently preferred. It should be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings.
In the figures, where like numerals identify like elements, there is shown an embodiment of a package formed by the combination of a container and overcap or closure lid. In
The overcap 12 includes a central body portion 26 and a surrounding skirt 28. The central body portion is preferably dimensioned to extend across and cover the opening 16. The skirt portion 28 includes a rim engagement structure 30 and a tamper evident structure 32. The rim engagement structure 30 is shown to include a plurality of projections 34 that extend outwardly from the body 26 and that curve over or around the rim 18 of the container 10. The tamper evident structure 32 is formed by a frangible ring 36 and plurality of inwardly directed tabs 38.
Further specifics of the overcap 12 are shown in detail within FIGS. 2.-5 The projections 34 that form the container rim engagement structure 30 as shown are equal in size, are preferably similar in form and are equidistantly spaced from one another. The spaces or opening s are labeled with the numeral 40. It is contemplated that the size of the projections and the spacing between adjacent projections may vary as desired for an engagement of the overcap on the container. The material of the overcap and the form and function of the adjacent structures of the overcap are among the factors to be considered in sizing the projections.
In the top view of the overcap 12 in
In the bottom view of
The cross section of the overcap 12 in
The body 26 of the overcap includes a central measuring well 46 surrounded by an inner wall 48. The inner wall 48 extends upwardly from a base wall 50 and connects to a peripheral flange 52. The plurality of projections 34 extend from the peripheral flange 52. In the form shown, the peripheral flange 52 is relatively short, wrapping over only a portion of the upper surface of the container rim (18), with the projections forming the major portion of the rim engagement structure 30.
The base wall 50 separates the well 46 from the inner wall 48. In addition, the various side walls of the well 46 as shown are formed to create a generally rectangular profile, as particularly shown in
This well volume is defined by the sidewalls 54, 56, 58 and 60 and the central portion 62 of the body 26e The well volume is also defined (in part) by the cross sections of Figs, 4 and 5. In forming the overcap 12, it is contemplated that the sidewalls be sized and positioned to define a desired volume for measuring a portion of the product (not shown) to be stored in the container (10). The user removes the overcap 12 from the container 10 and inverts the cap 12 to expose the well 46. The well 46 may then be filled with a portion of the product contents within the container 10. The fixed or known volume of the well 46 serves as a measure for further use of the product portion.
In
In
In
The inner wall 48 of the overcap body 26 is shown as being formed for engagement with the internal sidewall surface 24, opposite of the bead 20 on the container rim 18. In the manner, the inner wall 48 forms a seal with the rim 18 of the container 10 (see, for example, FIGS. 6A and 6B). As particularly shown in
In
In
A start-up element or gripping tab 76 is provided on the ring 34, as shown in, for example,
The alignment of the fingers or tabs within the spaces between adjacent projections creates advantages in use of the overcap, as well as in the formation of the overcap. In use, the openings permit visual inspection of the tabs. The tabs are provided to retain the overcap on the container. Preferably, the tabs create a sufficient retention force with the rim (and bead) of the container such that the overcap cannot be readily removed—prior to removal of the ring—without causing visible damage to tabs, overcap or container. The materials used to form the overcap and the dimensions and angular position of the tab members are intended to create an adaptive structure, providing a securing force against the container. The tabs must be separated from the outside wall of the container a sufficient distance to clear the bead of the container rim. In addition, multiple tabs are required to be separated from the container rim, before removal may (potentially) be accomplished. Preferably, the amount of movement required by the tab will cause a plastic deformation of one or more of the tabs, at their base connection to the ring member. Hence, a visible sign of tampering is provided. In addition, in the preferred structure, the engagement force of the tabs against the outside surface of the container, secures the overcap in position, accounting form dimensional variations in the container (and formation of the overcap). In addition, the dimensions of the overcap preferably cause the projected tip (end) of the tabs to engage under the bead of the container rim. Containers having a rolled rim or an added bead structure may include a slot-like formation for receipt of the tips of the tabs for further securing the overcap in position.
The tabs are provided for tamper resistance, maintaining the overcap on the container prior to separation of the ring. In addition, the visibility of the tabs provides an indication of tampering, such as the attempted removal of the overcap from the container. An initial inspection of the tabs at the time of purchase of the package should indicate that the tabs are engaged with the container and that the tabs have not been removed or otherwise distorted. Once the frangible ring has been separated from the overcap, the tabs are also removed. The overcap may then be lifted off of the container rim and access is provided to the contents of the container.
Removal of the overcap from the container, after separation of the ring and the associated tab members, is accomplished by separating the projections from the rim. If an inner wall is provided that engages the inside wall of the container rim, sufficient force is required to overcome any frictional engagement between the two. In addition, the ridge members need to be separated from under the projection of the bead on the rim, The flexing of the projections may be performed as part of lifting the overcap as a whole or the projections may be individually flexed to incrementally separate portions of the overcap around its circumference. The form of the well or body of the overcap may further provide a grasping surface during lifting of the overcap away from the rim. The spacing between the inner wall and the sidewalls of the well member provides finger access to form the grasping task.
In manufacturing the overcap, an injection molding process is preferred. As a result of interleaving the tabs and projections, mold part access is provided from both above and below the cap body. Preferably, no vertical overlap of the parts is provided. This type structure is illustrated in the top view of
The present invention has been described and illustrated with respect to one or more exemplary embodiments. It should be understood by those skilled in the art from the foregoing that various other changes, omissions and additions may be made therein, without departing from the spirit and scope of the present invention, with the scope of the invention being described by the foregoing claims.