Patent Application
20200223597
The present disclosure relates generally to closures, and in particular to closures with a tamper band to evidence when the closure has been removed. One method of manufacturing closures starts by forming the closure, cutting a line of frangible connections around a bottom of the closure's skirt, and then applying the closure to a container inlet. On occasion the frangible connections break during application of the closure to the container inlet. This disclosure describes a closure with a recess in an interior surface of a tamper band to reduce the deflection of the container engagement structure when the closure is applied to a container.
In one embodiment, a closure comprises a generally circular top panel centered about a vertical axis. The top panel comprises an upper surface, a lower surface and an outer periphery. A skirt extends downward and away from the outer peripheral edge of the top panel. The skirt comprising an inner surface and a thread formed about the inner surface. Frangible connections connect the skirt to a tamper band and provide a visual indication, when broken, that the closure has been opened decoupling the tamper band from the skirt. The tamper band comprises a sidewall coupled to the frangible connections, the sidewall comprising an inner surface facing towards the vertical axis, and the inner surface comprising a recess. The tamper band also comprises a connection point disposed at a bottom of the sidewall. The tamper band also comprises a container engagement structure pivotably coupled to the sidewall via the connection point. The container engagement structure pivots in a first rotational direction into the recess when the closure is applied to a container.
A portion of the container engagement structure is disposed within the recess at the moment of greatest deflection while the closure is being applied to a container. In various embodiments the percentage of the container engagement structure disposed within the recess is at least 10%, at least 20%, and at least 25%.
Various embodiments of the invention relate to any of the features, structures, elements, parameters, method steps, systems, components, subsystems, etc. described and shown herein, and various embodiments of the invention relate to any combination the features, structures, elements, parameters, method steps, systems, components, subsystems, etc. described and shown herein.
Alternative exemplary embodiments relate to other features and combinations of features as may be generally recited in the claims.
This application will become more fully understood from the following detailed description, taken in conjunction with the accompanying figures, wherein like reference numerals refer to like elements in which:
Before turning to the figures, which illustrate the exemplary embodiments in detail, it should be understood that the present application is not limited to the details or methodology set forth in the description or illustrated in the figures. It should also be understood that the terminology is for the purpose of description only and should not be regarded as limiting.
This disclosure provides a description for various embodiments of a closure with a recess that reduces that amount of deflection of the closure's sidewall while being applied to a container. As a result of the reduced deflection, there is a correspondingly reduced amount of stress places upon the frangible connections and therefore a reduced chance of one of the frangible connections breaking during application of the closure to a container.
Turning to
Skirt 18 is generally annular in cross-section and is substantially perpendicular to a plane-defined top panel 12. As depicted in
Located along the inner surface of the skirt 18 is a container engagement structure configured to interact with a corresponding closure engagement structure located on the neck of the container to which the closure 10 is to be sealingly applied. As shown in
In some embodiments, closure 10 may further include a tamper evidencing structure configured to provide indication to a user that the initial sealing engagement between the closure 10 and container has been disrupted as a result of the closure 10 being partially or entirely removed from the container. As shown in
A series of plugs 20, 22 and 24 engage against the container inlet to seal the contents of container. Plugs 20, 22 and 24 extend generally downward from lower surface 70 of top panel 12 in a direction away from upper surface 68 of top panel 12. In various embodiments, plugs 20, 22 and 24 are formed as annular, uninterrupted, continuous rings or walls extending 360 degrees about the lower surface 70 of the top panel 12. By these three plugs 20, 22 and 24, closure 10 provides a mechanism of multiple fluid seals, arranged in series, to provide a method for pressure in the container to be relieved. Therefore, the chances of a container breaking are correspondingly reduced. In the embodiments depicted, closure 10 includes first plug 20, second plug 22 and third plug 24, but it is contemplated herein that closure 10 may include any number and/or combination of first plug 20, second plug 22 and third plug 24 and still practice the teachings of this disclosure.
In various embodiments, the closures 10 discussed herein may be of various sizes intended to seal containers of various sizes and having various contents. In some exemplary embodiments, the closures 10 are configured to seal containers such as metal, glass or plastic containers or bottles for holding liquids, granular materials, food, etc. In various embodiments, plugs 20, 22 and 24 of the closures 10 discussed herein are suitable for maintaining a hermetic seal with the container neck finish to which the closure 10 is attached.
Turning to
Turning more particularly to
Container engagement structure 34 comprises engagement surface 40, with width 42, and protrusion 36 with width 58 that extends height 44 from engagement surface 40 to end 38. Exterior surface 50 of sidewall 46 faces away from central longitudinal axis 14. Internal surface 48 of sidewall 46, opposite exterior surface 50, includes recess 54 in which container engagement structure 34 is received. Width 56 is the width of sidewall 46 at connection point 52.
Recess 54 provides an area into which container engagement structure 34 can be rotated and ultimately displaced while closure 10 is applied to container 120. Recess 54 is a deflection of interior surface 48 in a direction towards exterior surface 50 and away from longitudinal axis 14. Recess 54 is delimited by top point 80 and bottom point 82, which collectively comprise periphery 84 of recess 54. In one embodiment, top point 80 and bottom point 82 encircle sidewall 46 at a uniform respective distance from connection point 52 forming an annular volume for recess 54.
Turning to
Turning even more specifically to
Recessed width 92 is the width of container engagement structure 34 disposed within recess 54 when container engagement structure 34 is in first position 90. Non-recessed width 94 is the width of container engagement structure 34 disposed outside recess 54 when container engagement structure 34 is in first position 90. It will be observed that the delineation between recessed width 92 and non-recessed width 94 is defined by plane 86, which itself defines recess 54 and extends between top point 80 of recess 54 and bottom point 82 of recess 54. Collectively recessed width 92 and non-recessed width 94 comprise total width 96.
In one embodiment, recessed width 92 is at least 10% of total width 96. That 10% of total width 96 disposed within recess 54 results in a correspondingly reduced deflection of sidewall 46 when container engagement structure 34 is located in first position 90. In one embodiment recessed width 92 is at least 15% of total width 96. In yet another embodiment recessed width 92 is at least 20% of total width 96. In yet another embodiment recessed width 92 is at least 25% of total width 96. Similar to for the 10% condition, those respective percentages of total width 96 within recess 54 each result in a correspondingly reduced deflection of sidewall 46 when container engagement structure 34 is located in first position 90.
Turning to
In various embodiments container 120 may comprise any number of inlets 122 (e.g., PET neck finish 122). Outer surface 124 of container 120 comprises thread 126, tamper evident band 128, and transfer band 134. Recess 130 extends between tamper evident band 128 and transfer band 134. Restricting surface 140, having width 132, of tamper evident band 128 interfaces against engagement surface 40 of container engagement structure 34. Transition 136 defines the corner between recess 130 and tamper evident band 128. In various embodiments transition 136 is sufficiently angled to prevent or reduce the chances of container engagement structure 34 slipping off tamper evident band 128 when closure 10 is being removed without forcing the breakage of frangible connections 30.
Tamper band 28 optionally further includes drain holes (not shown), which are arranged periodically around the tamper band 28. In various embodiments, closure 10 is configured to seal a container configured to hold consumable or edible products (e.g., beverages, water, food, etc.). In various embodiments, closure 10 is configured to seal a container that is a molded (e.g., blow-molded) thermoplastic beverage container configured to hermetically hold a beverage (e.g., water, juice, fortified or nutrient water, tea, sports drink, energy drink, milk, milk-based beverages, etc.). In other embodiments, closure 10 can be used to seal a wide variety of containers including pouches, jars, metal bottles, paper board cartons, etc.
In various embodiments, the closures 10 discussed herein may be formed from a plastic or polymer material. In various embodiments, the closures 10 may be formed by injection molding or by compression molding. For example, the closures 10 may be injection molded from a polypropylene homopolymer resin. In specific embodiments, the closures 10 may be made from a clear (e.g., translucent or transparent) polypropylene homopolymer resin, or they may be made from a clear random copolymer polypropylene. In various embodiments, the clear material of the closure 10 is such that the engagement structure (e.g., thread 26) is visible from the outside of the closure 10 through skirt 18.
In various exemplary embodiments, the relative dimensions, including angles, lengths and radii, as shown in the Figures are to scale. Actual measurements of the Figures will disclose relative dimensions, angles and proportions of the various exemplary embodiments. Various exemplary embodiments extend to various ranges around the absolute and relative dimensions, angles and proportions that may be determined from the Figures. Various exemplary embodiments include any combination of one or more relative dimensions or angles that may be determined from the Figures. Further, actual dimensions not expressly set out in this description can be determined by using the ratios of dimensions measured in the Figures in combination with the express dimensions set out in this description. It should also be understood that the terminology is for the purpose of description only and should not be regarded as limiting.
It should be understood that the figures illustrate the exemplary embodiments in detail, and it should be understood that the present application is not limited to the details or methodology set forth in the description or illustrated in the figures. It should also be understood that the terminology is for the purpose of description only and should not be regarded as limiting.
Further modifications and alternative embodiments of various aspects of the invention will be apparent to those skilled in the art in view of this description. Accordingly, this description is to be construed as illustrative only. The construction and arrangements, shown in the various exemplary embodiments, are illustrative only. Although only a few embodiments have been described in detail in this disclosure, many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. Some elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. The order or sequence of any process, logical algorithm, or method steps may be varied or re-sequenced according to alternative embodiments. Other substitutions, modifications, changes and omissions may also be made in the design, operating conditions and arrangement of the various exemplary embodiments without departing from the scope of the present invention.
