Tapered closure and closure system
11780652 · 2023-10-10
Assignee
Inventors
Cpc classification
B65D2401/30
PERFORMING OPERATIONS; TRANSPORTING
B65D41/325
PERFORMING OPERATIONS; TRANSPORTING
B65D41/3428
PERFORMING OPERATIONS; TRANSPORTING
B65D55/16
PERFORMING OPERATIONS; TRANSPORTING
B65D41/3447
PERFORMING OPERATIONS; TRANSPORTING
B65D2251/1008
PERFORMING OPERATIONS; TRANSPORTING
International classification
B65D41/34
PERFORMING OPERATIONS; TRANSPORTING
Abstract
A closure for a container includes a top panel, a skirt depending from the top panel and extending circumferentially about a central axis, a tamper-evident band attached to the skirt, and at least one thread extending from an interior surface of the skirt. The skirt extends from a first end attached to the top panel to a second end opposite the first end. The skirt is tapered radially outward from the first end to the second end such that a diameter of the skirt at the second end is greater than the diameter of the skirt at the first end.
Claims
1. A closure for a container, said closure comprising: a top panel; a skirt depending from the top panel and extending circumferentially about a central axis, wherein the skirt extends from a first end attached to the top panel to a second end opposite the first end, the skirt having an interior surface and an exterior surface; a tamper-evident band extending from a first end, attached to the second end of the skirt, to a second end; an attachment band hingedly connected to the second end of the tamper-evident band; and at least one thread extending from the interior surface of the skirt; wherein the skirt is tapered radially outward from the first end to the second end such that a diameter of the skirt at the second end is greater than the diameter of the skirt at the first end; and wherein the tamper-evident band is tapered radially outward over at least a portion from the first end to the second end such that an inner diameter of the tamper-evident band at the second end is greater than the inner diameter of the tamper-evident band at the first end.
2. The closure according to claim 1, wherein the at least one thread comprises a plurality of threads.
3. The closure according to claim 2, wherein a radial spacing between the central axis and each thread increases as each thread extends towards the second end of the skirt and a thread height of each thread remains constant.
4. The closure according to claim 1, wherein the tamper-evident band is tethered to the skirt by a hinge such that the skirt remains connected to the tamper-evident band after the closure is opened.
5. The closure according to claim 4, wherein a deflectable tab extends from the hinge, and wherein at least one tooth extends from the deflectable tab and is operable to engage a retention section of the tamper-evident band to hold the closure in an opened position.
6. The closure according to claim 1, wherein a radial spacing between the at least one thread and the central axis increases as the at least one thread extends towards the second end of the skirt.
7. The closure according to claim 1, wherein an angle between the interior surface of the skirt and the central axis is between 1° and 10°.
8. The closure according to claim 1, wherein the tamper-evident band is frangibly attached to the skirt by a plurality of frangible tabs.
9. A closure for a container, said closure comprising: a top panel including a transition section along an outer peripheral edge thereof; a skirt depending from the top panel at the transition section and extending circumferentially about a central axis, wherein the skirt extends from a first end attached to the top panel to a second end opposite the first end, the skirt having an interior surface and an exterior surface; a tamper-evident band extending from a first end, frangibly attached to the skirt by a plurality of frangible tabs at the second end of the skirt, to a second end, wherein the tamper-evident band is tethered to the skirt by a hinge such that the skirt remains connected to the tamper-evident band after the frangible tabs are separated; an attachment band hingedly connected to the second end of the tamper-evident band; a deflectable tab extending from the hinge and operable to engage a retention section of the tamper-evident band to hold the closure in an opened position; and a plurality of threads extending from the interior surface of the skirt; wherein the skirt is tapered radially outward from the first end to the second end such that a diameter of the skirt at the second end is greater than the diameter of the skirt at the first end, and such that a radial spacing between the plurality of threads and the central axis increases as each of the threads extends towards the second end of the skirt; and wherein the tamper-evident band is tapered radially outward over at least a portion from the first end to the second end such that an inner diameter of the tamper-evident band at the second end is greater than the inner diameter of the tamper-evident band at the first end.
10. The closure according to claim 9, wherein the skirt is tapered radially outward at an angle in a range of 1° and 10° relative to the central axis.
11. The closure according to claim 9, wherein the tamper-evident band includes at least one circumferentially extending slot that allows the hinge to move between a closed position and the opened position.
12. The closure according to claim 9, wherein the radial spacing increases as each thread extends towards the second end of the skirt and a thread height of each thread remains constant.
13. A closure system comprising: a container comprising: a sidewall defining a cavity; and a neck extending from the sidewall and defining an opening to the cavity, wherein the neck extends from a first end defining the opening to a second end joined to the sidewall, wherein the neck includes at least one thread on an exterior surface thereof, wherein the neck is tapered radially outward from the first end towards the second end; and a closure threadably connectable to the container, the closure comprising: a top panel; a skirt depending from the top panel extending circumferentially about a central skirt axis, wherein the skirt extends from a first end attached to the top panel to a second end opposite the first end, the skirt having an interior surface and an exterior surface; a tamper-evident band extending from a first end, attached to the second end of the skirt, to a second end; an attachment band hingedly connected to the second end of the tamper-evident band; and at least one thread extending from the interior surface of the skirt and configured to threadably engage the at least one thread of the container neck; wherein the skirt is tapered radially outward from the first end to the second end such that a diameter of the skirt at the second end is greater than the diameter of the skirt at the first end, wherein a taper angle of the skirt corresponds to a taper angle of the neck; and wherein the tamper-evident band is tapered radially outward over at least a portion from the first end to the second end such that an inner diameter of the tamper-evident band at the second end is greater than the inner diameter of the tamper-evident band at the first end.
14. The closure system according to claim 13, wherein the at least one thread of the neck comprises a plurality of threads and wherein the at least one thread of the closure comprises a plurality of threads.
15. The closure system according to claim 13, wherein the tamper-evident band is tethered to the skirt by a hinge such that the skirt remains connected to the tamper-evident band after the closure is opened.
16. The closure system according to claim 15, wherein a deflectable tab extends from the hinge, and wherein at least one tooth extends from the deflectable tab and is operable to engage a retention section of the tamper-evident band to hold the closure in an opened position.
17. The closure system according to claim 13, wherein a radial spacing between the at least one thread of the closure and the central axis increases as the at least one thread extends towards the second end of the skirt.
18. The closure system according to claim 17, wherein the radial spacing increases as the at least one thread extends towards the second end of the skirt and a thread height of the at least one thread remains constant.
19. The closure system according to claim 13, wherein an angle between the interior surface of the skirt and the central skirt axis is between 1° and 10°.
20. The closure system according to claim 13, wherein the tamper-evident band is frangibly attached to the skirt by a plurality of frangible tabs.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
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DETAILED DESCRIPTION
(11) A closure and a corresponding closure system are described herein that facilitate improved resistance of a closure that is placed over an opening of a container to being inadvertently removed from the container, for example, during container filling and/or capping operations, and during use by consumers. For example, embodiments of the closures and closure systems disclosed herein utilize a taper effect to facilitate placement and/or securement of the closure on the neck of a container, e.g., during the manufacturing and assembly process.
(12) In contrast to at least some known closures and closure systems, the closures and closure systems of the present disclosure can have a thread height that is substantially constant (i.e., is not reduced) along the height or length of the closure and/or the container neck. For example, some known closures and closure systems have a reduced thread height near the bottom of the closure and/or near the top of the neck of the container, with the height of the thread increasing towards the top of the closure and/or the bottom of the neck. While this can facilitate positioning the closure on the container neck (e.g., during a filling operation of the container), the reduced thread height can cause the closure to be improperly or insufficiently secured to the container neck, resulting in the closure being inadvertently removed (e.g., at later stages of a filling operation or during transport). Embodiments of the closures and closure systems described herein can include container necks having external threads with a substantially constant or non-reduced height near the opening of the container and/or closures having internal threads with a substantially constant or non-reduced height.
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(15) The closure 100 of the illustrated embodiment has a generally closed cylindrical shape, with the top panel 102 being generally circular and the skirt 104 being generally cylindrical. Additionally, the top panel 102 includes a transition section 110 along an outer peripheral edge 112 thereof that joins the skirt 104. In the illustrated embodiment, the transition section 110 is generally curved. In other embodiments, the transition section 110 can be of any suitable configuration that allows the closure 100 and/or the closure system 300 to function as described herein.
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(17) The skirt 104 depends from the top panel 102 and extends circumferentially about the central axis 116. The skirt 104 is spaced radially outward from the sealing ring 114. In the illustrated embodiment, the skirt 104 extends from a first end 118 attached to the transition section 110 of the top panel 102 to a second end 120 opposite to the first end 118. The second end 120 may be, for example, at a location where the skirt 104 attaches to the tamper-evident band 106. In the illustrated embodiment, the skirt 104 includes an exterior surface 122 and an interior surface 124 with at least one internal thread 126 extending radially inward from the interior surface 124. The at least one internal thread 126 can be a single, continuous internal thread extending helically around the interior surface 124 of the skirt 104, or the at least one thread 126 can include multiple different threads. As shown in
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(19) According to this configuration, the skirt 104 includes a radial taper of the diameter D (specifically, the diameter of the interior surface 124) of the skirt 104. The radial taper of the skirt 104 can be, for example and without limitation, a generally linear taper of the diameter D of the skirt 104, as is shown in the embodiment depicted in
(20) Further, as shown in
(21) With additional reference to
(22) As shown in
(23) The tapered configuration of the closure (e.g., the increased diameter D of the skirt 104 and increased radial spacing of the internal threads 126 at the second end 120 of the skirt 104) can result in a relatively larger diameter D2 of the attachment band 108 in the folded configuration (shown in
(24) In some embodiments, the tamper-evident band 106 is frangibly attached to the skirt 104 by at least one frangible tab 154 (shown in
(25) The tamper-evident band 106 may also include a hinge 156 formed in the tamper-evident band 106 (shown in
(26) The tamper-evident band 106 can also include one or more circumferentially-extending slots 158 that facilitate hingedly moving the closure 100 about the hinge 156. The example embodiment includes a single continuous slot 158 that is generally defined by parallel edges of the tamper-evident band 106. In the embodiment shown in
(27) In the illustrated embodiment, the hinge 156 also includes a deflectable tab 160 including a tooth 162 that extends radially outward from the tab 160. The deflectable tab 160 (specifically, the tooth 162) may be operable to engage a retention section 164 of the tamper-evident band 106 (shown in
(28) Referring again to
(29) As shown in
(30) As shown in
(31) Moreover, in the illustrated embodiment, each external thread 214 has a substantially constant height as the thread extends from the first end 206 towards the second end 210. For example, each external thread 214 may have a constant height except for the thread start and end portions.
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(33) Further, as shown in
(34) In one example embodiment, during a filing or capping operation of the container 200, the closure 100 is positioned on top of the opening 232 of the container 200. When the closure 100 is initially positioned on top of the container 200, the attachment band 108 may rest on the tamper-evident bead 218 (specifically, along the top curved edge 222). The closure 100 is subsequently secured to the container 200 by engaging the internal thread 126 of the skirt 104 of the closure 100 with the external thread 214 of the neck 202 of the container 200. During this process, the free end 146 of the attachment band 108 traverses the tamper-evident bead 218 and engages the straight edge 220 of the tamper-evident bead 218 of the neck 202 of the container 200, such that the tamper-evident band 106 is inhibited or prevented from being removed from container 200 with the rest of the closure 100. The attachment band 108 is folded into the folded configuration before the closure 100 is installed onto the container 200. An example of the attachment band 108 in the folded configuration and engaging the tamper-evident bead 218 of the neck 202 of the container 200 is shown in
(35) The tapered closure 100 and tapered neck 202 of the container 200 facilitate positioning and securing the closure 100 to the container 200 during certain processes, such as filling and/or capping procedures. For example, the increased diameter D2 of the attachment band 108 in the folded configuration and the decreased diameter D3 of the first end 206 of the neck 202 and the corresponding external thread 214 of the neck 202 near the first end 206 of the neck 202 facilitate more securely placing and retaining the closure 100 on the neck 202 of the container 200 prior to the closure 100 being further secured (e.g., threaded) to the container 200. Such a configuration allows for less interference between portions of the closure 100 (e.g., the attachment band 108) and the neck 202 (e.g., external thread 214 of the neck 202 of the container 200), for example, during wipe on closure applications in container filling or capping operations. This configuration consequently allows the closure 100 to sit further down on the neck 202 of the container 200 (i.e., closer to the second end 210 of the neck 202 of the container 200) before the closure 100 is further secured to the container 200 via threading the closure 100 onto the container 200 via the internal thread 126 of the skirt 104 of the closure 100 engaging the external thread 214 of the neck 202 of the container 200. With the closure 100 sitting further down on the neck 202 of the container 200 before the closure 100 is further secured to the container, it is more likely that the closure 100 will remain positioned on the neck 202 of the container 200 before the closure 100 is further secured to the container 200. Additionally, the closure 100 sitting further down on the neck 202 of the container 200 enables the closure 100 to be more-easily secured (e.g., threaded) to the container 200 via production equipment.
(36) Accordingly, when the closure 100 is placed on the container 200 prior to being secured to the container 200, the taper effect integrated into both the closure 100 and the container 200 helps to keep the closure 100 on the container 200 prior to the closure 100 being further secured to the container 200, and also enables the closure 100 to be better secured to the container 200 via production equipment. Such a configuration presents advantages during production (e.g., filling and capping operations) and consumer use.
(37) The tapered configuration of the closure 100 and neck 202 also facilitates opening and closing tethered closures (e.g., by the end user). For example, the increased clearance between the bottom of the closure and the top of the container neck resulting from the tapered configuration allow the tethered closure to be rotated between the closed and open position and vice-versa (e.g., via the hinge) without the closure and neck interfering or impeding movement of the closure.
(38) Moreover, the tapered configuration of the closure 100 and neck 202 allows for a reduced clearance (i.e., tighter fit) between the closure and neck threads when the closure 100 is secured to the neck 202, thereby enhancing the engagement of the closure and neck threads. The increased engagement is particularly advantageous for lightweight containers or bottles (e.g., containers formed of thin-walled plastics, such as lightweight high-density polyethylene (HDPE) used to package fresh milk and juices), where deformation of the container neck might otherwise cause the closure to be dislodged from the container during transport and/or bottle handling.
(39) The present disclosure provides at least the following technical benefits and advantages: (i) eliminating leaks and spills on container filling lines; (ii) eliminating leaks and spills during container distribution; (iii) eliminating leaks and spills during handling and use of the container by consumers; (iv) easy application of the closure to the container on container filling lines, (v) reduction in cost incurred to container filling corporations.
(40) Additionally, the present disclosure provides solutions to at least the following problems: (i) a tendency of conventional closures placed on conventional containers to be inadvertently removed from the container prior to being secured to the container and (ii) application issues related to filling machines with wipe on closure applicators. For example, during wipe on closure applications, closures are presented and applied to the containers via an inclined ramp down which the closures can slide, with the neck of the container being placed at the bottom of the ramp and receiving a closure via the ramp during application. When conventional closures are used in wipe on closure application systems, the conventional closures may be incorrectly placed or aligned on the container on which they are applied in the wipe on application process due to, for example, interference between the internal side surfaces of the closure and the external side surfaces of the neck of the container. Incorrect placement or alignment of closures on the container can result in the closure being incorrectly presented to production equipment later on in the production process, which can cause the closure to be incorrectly (e.g., crookedly) installed on the container. If the closure is incorrectly installed on the container, the closure may not adequately seal the container, and/or the closure may not be adequately secured to the container. For example, if the closure is not adequately secured to the container, pressure within the container (e.g., due to movement or jostling during transport) may cause the closure to be inadvertently removed from the container. Additionally, if the closure is not adequately sealed to the container, then the contents of the container may spill (e.g., during transportation or consumer use).
(41) Although specific features of various embodiments of the disclosure may be shown in some drawings and not in others, this is for convenience only. In accordance with the principles of the disclosure, any feature of a drawing may be referenced and/or claimed in combination with any feature of any other drawing.
(42) This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.