JP2007513027A - Children tamper-proof closures, containers and packages - Google Patents

Abstract

A child-resistant package (20) includes a container (24) having a finish (28) with an open end (36), at least one external thread (34), at least one stop lug (32) projecting radially outwardly from the finish, and a closure (22) having a base wall (56), a skirt (60) with at least one internal thread (64) for engagement with the thread on the container finish, at least one spring element (58), and at least one pair of internal lugs (76, 78) on the skirt and extending radially inwardly from the skirt. Each pair of lugs on the skirt includes a first lug (76) that cooperates with the stop lug on the container finish to prevent unthreading of the closure from the finish absent pressure on the closure against the spring element to push the first lug on the skirt beneath the corresponding stop lug on the container finish, and a second lug (78) circumferentially spaced from the first lug that cooperates with the stop lug on the container finish to prevent "over-threading" or over tightening of the closure on the finish.

Description

  The present invention relates to child tamper-proof packages, closures, containers for such packages, and methods of making such packages, closures and containers.

  Children's tamper-proof packages are typically employed in numerous other applications including vials, vitamin bottles, and containers for corrosive or dangerous substances.

  The invention particularly relates to these types of child tamper-proof packages that involve the application of axial pressure and simultaneous rotation of the closure with respect to the container to remove the closure from the container. The present invention involves a number of features or aspects of a child tamper-proof closure, container, or package that are filled separately from each other, and more preferably in combination with each other.

  The child tamper-proof package includes a container having an opening end, at least one external thread, a mouth having at least one stop projection projecting radially outwardly, and a base wall, an external thread of the container mouth And a skirt having at least one internal thread, at least one spring element, and a closure having at least a pair of ledges provided on the skirt. Each pair of skirt ledges includes a first ledge that cooperates with the stop ledge of the container mouth to place the first skirt of the skirt for the corresponding stop of the container mouth. Under the ledge, if no pressure is applied to the closure against the spring element, it prevents unscrewing of the closure from the mouth. Each pair of skirt ledges preferably includes a second ledge circumferentially spaced from the first ledge, the second ledge in cooperation with a stop ledge at the container mouth. Prevent "over-screwing" or "tightening" of the closure on the mouth. Thus, the first ledge provides a child tamper-proof feature that requires the closure to be pushed and turned to remove the closure from the container mouth. The second ledge provides a screw stop feature that limits the extent to which the closure can be screwed into the container mouth to prevent damage to the ledge, screws and springs.

  In one exemplary embodiment of the child tamper-proof package, the stop ledge of the container mouth and the first ledge of the closure skirt have a cam surface extending in the circumferential direction and inclined in the axial direction. When the closure is screwed into or rotated on the container, the closure is gradually moved toward the container against the bias of the spring element during the engagement range of the first ledge and the stop ledge. Eventually, the first ledge of the closure passes through the stop ledge of the container mouth, at which time the spring element pushes the closure away from the container. Thus, in this configuration, the first ledge of the closure skirt slides or cams under the stop ledge of the container mouth. In another exemplary embodiment of the child tamper-proof container package, the first ledge of the closure skirt engages the stop ledge and causes the first ledge of the closure skirt to have a radius on the stop ledge of the container mouth. It has a cam surface which is inclined in the radial direction to cam outward in the direction. In both embodiments, after the first ledge of the closure skirt has passed the stop ledge of the container mouth, reverse rotation of the closure moves the first ledge below the stop ledge of the container mouth. Unless a sufficient axial force is applied to the closure against the spring element, it is prevented by the engagement of the first ledge and the stop ledge.

  These and other objects, features, advantages and aspects of the present invention will become apparent from the following detailed description of the preferred embodiments and the best mode, the appended claims and the accompanying drawings.

  1 and 2 illustrate a child tamper-proof closure and container package 20 according to a presently preferred embodiment of the invention as including a closure 22 threaded onto a container 24. The present invention is a so-called push-and-turn package that allows the closure 22 to rotate in order to axially push the closure 22 toward the container 24 and remove it from the container to overcome the spring bias. The spring bias is typically provided without the use of a liner (not shown) that is separately attached to the closure 22. As such, the present invention includes the use of a linerless closure 22.

  The container 24 is of an integrally molded plastic structure having a closed bottom or base (not shown), a side wall 26 extending axially from the base, and a generally cylindrical mouth 28 extending axially from the side wall 26. The diameter of the mouth portion 28 is smaller than the diameter of the side wall, and the mouth portion 28 is connected to the side wall 26 by a shoulder 30. Displaced axially from the shoulder 30 is formed at least one, preferably four, radially extending external ledges or child tamper-proof projections 32. Similarly, at least one male screw 34 is formed axially displaced from the protrusion 32, and the male screw 34 extends partially around the circumference of the mouth 28. The mouth 28 terminates axially at an end 36 connected to the inner surface of the mouth 28 by a tapered surface 40 that at least partially constitutes the opening of the container 24.

  FIGS. 12-14 further illustrate the screw 34 and protrusion 32 of the mouth 28 of the container 24. FIG. 13 also illustrates the inner surface 38, tapered surface 40 and end 36 of the mouth 28. FIG. 15 shows one of the protrusions 32 having an axial leg portion 42 at the counterclockwise end of the flange or tangential leg portion 44. The axial leg portion 42 includes a circumferentially facing screw stop surface 46, an axially facing bottom surface 48, and a cam surface 50 extending therebetween. The tangential leg portion 44 of the protrusion 32 is disposed on the opposite side of the screw stop surface 46 and faces the circumferentially extending child between the bottom surface 48 and the axially facing child tamper-preventing retaining surface 54. A mischief prevention stop surface 52 is included.

  Referring again to FIGS. 1 and 2, the closure 22 is of a plastic construction, from the base wall 56 for resilient internal engagement between the laterally extending base wall 56 and the opening of the container 24. A spring element in the form of an inner annular wall 58 depending on the axial direction and an outer annular skirt 60 depending axially from the base wall 56 for securing the closure 22 to the mouth 28 of the container 24. The inner annular wall 58 is disposed radially inward of the skirt 60 and extends substantially axially, but is inversely tapered so as to incline radially outward from the base wall 56 to the open end 62. . Skirt 60 includes at least one internal thread 64 adjacent base wall 56 for engagement with external thread 34 of container 24 to thread closure 22 into mouth 28 of container 24. The skirt 60 further includes an extended skirt portion 66 having an outer surface 68 and terminating the skirt 60 axially at the open end 70 opposite the base wall 56. The extended skirt portion 66 is connected to the rest of the skirt by an outer shoulder 72 and an inner shoulder 74. Proximal to the open end 70, at least one child tamper or locking ledge 76 extends radially inward and proximate to the inner shoulder 74, overtightening the closure 22 into the container 24. Alternatively, at least one stop lug 78 extends radially inward to prevent overtightening. The locking lug 76 of the closure 22 engages the corresponding radially extending protrusion 32 of the container 24 circumferentially when the closure 22 is fully screwed into the mouth 28 of the container 24, and so on. As described further below, the elasticity of the inner annular wall 58 pushes the locking ledge 76 to engage the protrusion 32 in the axial direction.

  7-11 further illustrate various features of the closure 22 in fine detail. For example, FIG. 7 shows an inner annular wall 58 having an outer surface 80 disposed opposite the inner surface 82, an open end 62, and an inclined cam surface 84 extending therebetween. FIG. 7 also serves to illustrate the axial relationship between the locking ledge 76 and the stop ledge 78, which is just above the end 70 of the expansion skirt portion 66. Once positioned, the stop ledge 78 is positioned immediately axially below the inner shoulder 74. Therefore, the locking protrusion 78 is positioned immediately above the locking protrusion 76 in the axial direction.

  FIG. 8 shows a bottom plan view of the closure 22. An inner annular wall 58 having an inner surface 82, an open end 62, a cam surface 84, and an outer surface 80 is shown. Also shown are a screw 64, a locking ledge 76, a stop ledge 78, and a circumferentially disposed gap 86 therebetween, when the closure 22 is secured to the container 24. The protrusion part 32 (FIG. 2) of the opening | mouth part 28 is located in this clearance gap. Finally, the open end 70 and the outer surface 68 of the extended skirt portion 66 are shown.

  FIG. 9 further illustrates the axial relationship between the stop ledge 78 and the locking ledge 76, with the extended skirt portion 66 and the stop ledge 78 shown in cross section, Shown in solid. The locking ledge 76 includes a circumferentially facing child tamper-proof stop surface 88, a radial inner surface 90 connected to the stop surface 88, and an inclined surface 92 connected to the radial inner surface 90. The locking ledge 76 also includes an inclined cam surface 96 coupled to the axial retention surface for engagement with the axial retention surface 94 and the protrusion 32 of the mouth portion 28 of the container 24 (FIG. 1). .

  The axial retaining surface 94 and the radial inner surface 90 of the locking ledge 76 are also shown in FIG. 10, and the locking ledge 76 extends radially inward from the expansion skirt portion 66. As can also be seen from FIGS. 10 and 9, the stop lug 78 is connected to the radially inner surface 100 and faces circumferentially to engage the protrusion 32 of the mouth 28 of the container 24 (FIG. 1). Screw stop surface 98 is included. As shown in FIG. 11, the radially inner surface 90 extends axially downward from the inner shoulder 74 of the skirt 60 and the screw stop surface 98 extends radially inward from the extended skirt portion 66.

  Referring again to FIGS. 1 and 2, the closure 22 attaches the closure 22 to the container 24 by aligning the extended skirt portion 66 with the mouth 28 of the container 24 and rotating the closure 22 relative to the mouth. At that time, the screw 64 of the closure 22 is screwed into the screw 34 of the mouth portion 28 of the container 24. The continuous rotation of the closure 22 eventually leads to an initial engagement between the inner annular wall 58 of the closure 22 and the opening of the container 24. As also shown in FIG. 5, the inclined surface 84 of the inner annular wall 58 of the closure 22 is sealingly engaged with a corresponding inclined surface 40 of the mouth 28 of the container 24 between the closure 22 and the container 24. Ensure circumferential surface contact seal. In this way, no separate liner member of any kind need be attached to the closure 22 for sealing purposes. When the closure 22 is screwed toward the container 24, the inclined surface 40 of the mouth 28 tends to compress the inner annular wall 58 in a radially inward direction, thereby creating further axial movement resistance of the closure 22. Let Thus, the matching taper structure has the effect of urging the closure 22 axially away from the container 24. Referring again to FIG. 1, this biasing action pushes the locking ledge 76 of the closure 22 and causes it to axially lock upward with the protrusion 32 of the mouth 28 of the container 24, eventually reaching the closure 22. This downward force overcomes the biasing action, and at this point the closure 22 can be unscrewed from the container 24 as discussed in more detail below. In other words, the inner annular wall 58 is flexibly engaged with the tapered surface 40 of the container 24 by a diametric interference fit, whereby such an interference fit exerts a biasing force on the inner annular wall 58, thereby An upward force is generated which tends to keep the locking ledge 76 in a generally circumferential alignment with the protrusion 32 of the container 22.

  The continued rotation of the closure 22 with respect to the container 24 leads to an initial engagement between the locking ledge 76 of the closure 22 and the radial protrusion 32 of the mouth 28. In particular, as shown in FIG. 6A, the cam surface 96 of the locking ledge 76 of the closure 22 initially engages the cam surface 50 of the radial protrusion 32. When the closure 22 is further rotated, the locking ledge 76 passes under the radial protrusion 32 by cooperating cam surfaces 50, 96. As shown in FIG. 6B, the stop surface 98 of the stop ledge 78 eventually engages the stop surface 46 of the protrusion 32 to stop the rotation of the closure 22, thereby overtightening and removing the closure. Prevent damage to the closure that occurs. In particular, the stop ledge 78 prevents over tightening such that excessive pressure is applied to the inner annular wall 58 to permanently deform it. As also shown in FIG. 6B, the locking ledge 76 passes almost completely but not at all beyond the radial protrusion 32. Rather, the locking ledge 76 is shown axially covered or captured by the tangential leg portion 44 of the radial protrusion 32, and between the retaining surfaces 54 and 94, a closure is placed between the container 24 ( An axial space is shown which is the result of the downward pressure applied to the closure 22 when fixed in FIG.

  FIG. 6 illustrates the closure and container package 20 in a resting closed state after the closure 22 is attached, the tangential leg portion 44 of the protrusion 32 capturing the locking ledge 76 axially, The child tampering prevention stop surface 52 of the protruding portion 32 stops the locking protrusion 76 in the counterclockwise direction in the circumferential direction, and the closure 22 cannot be removed. FIG. 4 illustrates the same resting closed state as in FIG. 6, with the radial protrusion 32 being captured circumferentially between the stop ledge 78 and the locking ledge 76, The upholstery 76 is captured axially in the upward direction by the tangential leg portion 44 of the radial protrusion 32. FIG. 3 shows a resting closed state where it is clear that the radial protrusion 32 prevents the locking ledge 76 from moving counterclockwise.

  Referring again to FIG. 1, the closure cannot be removed from the container 24 simply by turning the closure 22 in a counterclockwise direction. Rather, the closure 22 is first removed from the container 24 by applying a downward force to the closure that overcomes the upward biasing force caused by the engaged inner annular wall 58 and the container mouth and the closure mouth and container mouth. . Such downward forces allow the closure 22 to move axially relative to the container into the axial space 33 between the screw 64 of the closure 22 and the screw 34 of the container 24. Referring now to FIG. 6C, with the axial movement described above, the locking ledge 76 can now rotate counterclockwise and can pass freely under the radial protrusion 32. The closure 22 can be unscrewed from the container 24 as shown in FIG.

  16 to 20 show a modified package 100 according to the present invention. Container 24 and mouth 28 are as in the embodiment of FIGS. 1-15. A seal disc 102 seals the opening of the container mouth 28 and is otherwise attached thereto. The spring element of the closure 104 is comprised of a plurality of circumferentially spaced segmented spring fingers 106 that hang from the interior of the base wall 56 adjacent the junction of the base wall and the skirt 60. . The spring fingers 106 are arced inward and upward so that they slide inwardly along the top surface of the disk 102 when tightening the closure. Each spring finger is supported by at least one, and preferably two arcuate ridges 108 depending from the base wall 56 to prevent over compression of the spring element.

  21-22 is a modification of the embodiment of FIGS. 16-20 in which the spring element provided in the closure is a circumferentially continuous conical spring element 110 depending from the underside of the base wall adjacent to the closure skirt. An example is shown. The spring element 110 may be used with or without the seal disk 102 (FIG. 17).

  Thus, a child tamper-proof package, closure, container, and method for making a child tamper-proof package have been disclosed. Several presently preferred embodiments of the present invention have been disclosed. A number of modifications and variations have been discussed. Those skilled in the art will readily recognize that the description of the presently preferred embodiments and suggested modifications and variations have been given by way of illustration and not limitation. Other modifications and variations will readily suggest themselves to those skilled in the art. The present invention includes all such embodiments, modifications and variations that fall within the spirit and broad scope of the appended claims. Further, descriptive adjectives used in the specification, such as, for example, bottom, top, clockwise, counterclockwise, etc., are used with reference to packages, closures, and containers as shown in the accompanying drawings, Generally, the closure is positioned at the mouth of the container to provide the container in an upright position.

1 is a fragmentary cross-sectional view of a closure and container package according to one exemplary embodiment of the present invention. FIG. FIG. 2 is a fragmentary exploded view of the closure and container package of FIG. 1. FIG. 3 is a cross-sectional view taken substantially along line 3-3 in FIG. 1. It is an enlarged view of the part in the circle | round | yen 4 of FIG. It is an enlarged view of the part in the circle | round | yen 5 of FIG. FIG. 6 is an enlarged cross-sectional view of the closure and container package substantially along line 6-6 of FIG. 3; FIG. 7 is a modified view of the closure and container package of FIG. 6 showing a portion of the container and the portion of the closure initially engaged with each other. FIG. 6B is a modified view of the closure and container of FIG. 6A showing a portion of the container and a portion of the closure rotated past each other. FIG. 7 is a modified view of the closure and container package of FIG. 6 showing a portion of the container that has been moved and displaced axially and circumferentially in a counterclockwise direction with respect to a portion of the closure. It is sectional drawing of the closure of FIG. FIG. 8 is a bottom view of the closure of FIG. 7. FIG. 9 is a cross-sectional view of the closure of FIG. 7 taken along line 9-9. FIG. 10 is a cross-sectional view of the closure of FIG. 9 taken along line 10-10. FIG. 11 is a cross-sectional view of the closure of FIG. FIG. 2 is a fragmentary elevational view of the container of FIG. It is a top view of the container of FIG. FIG. 13 is a fragmentary elevational view of the container of FIG. 1 rotated a quarter turn clockwise compared to the view of FIG. FIG. 2 is an enlarged fragmentary elevational view of a portion of the container of FIG. FIG. 6 is a fragmentary cross-sectional view of another presently preferred embodiment of a child tamper-proof package. It is a fragmentary perspective view which shows the closure and container opening of the package shown in FIG. FIG. 18 is a cross-sectional view of the closure of the package shown in FIG. 16-17. It is a bottom view which shows the inside of a closure. FIG. 3 is an enlarged fragmentary cross-sectional view showing the spring element and spring stop of the closure. It is sectional drawing of the closure of the deformation | transformation embodiment of a child tamperproof package. It is sectional drawing of the closure of the package of FIG.

Claims (41)

A container (24) having an open end (36), a first portion adjacent to the open end, and a cylindrical mouth (28) having at least one external thread (34) provided in the first portion; and a base A skirt (60) having a wall (56), a first portion adjacent to the base wall and at least one internal thread (64) for engaging the at least one external thread of the mouth, and the at least one spring A closure (22) having an element (58 or 106 or 110), wherein the at least one spring element is operatively associated with the open end of the mouth to position the closure in an axial direction of the mouth. In the energizing child tamper-proof package,
The container mouth portion is separated from the second portion spaced from the opening end and the at least one male screw, spaced axially from the male screw, and radially outward from the mouth portion. Having at least one stop lug (32) protruding;
The closure skirt has a second portion remote from the base wall and at least one pair of internal ledges (76, 78) extending radially inwardly from the second portion and axially spaced from the female thread. And
The at least one pair of ledges of the skirt includes a first ledge (76) and a second ledge (78) spaced circumferentially from the first ledge, wherein the first ledge comprises: The pressure to push the first skirt of the skirt under the corresponding stop ledge of the container mouth in cooperation with the stop ledge of the container mouth is not applied to the closure against the spring element Preventing unscrewing of the closure from the mouth, and the second ledge cooperates with the at least one stop ledge of the container mouth to prevent further screwing of the closure into the mouth. A child prank prevention package, characterized by that.   The at least one stop ledge (32) of the mouth has a cam surface (50), and the first ledge (76) of the skirt engages the stop ledge of the mouth. And a cam surface (96) adapted to move at least a portion of the closure to pass the first ledge through the at least one stop ledge when the closure is screwed into the mouth. The package according to 1.   The cam surface (50) of the stop ledge (32) and the cam surface (96) of the first ledge (76) are such that when the closure is screwed into the mouth, the first ledge is the at least one stop ledge. The package of claim 2, wherein the package is tilted axially to pass under the tension.   The spring element (58 or 106 or 110) is gradually moved against its bias when the first ledge (76) passes under the at least one stop ledge, the first ledge being After passing through the at least one stop ledge, a spring element returns toward its unmoved position to raise the first ledge and to tie the first ledge at least partially with the at least one stop ledge. 4. The package of claim 3, wherein the package is aligned in an axial direction.   The at least one stop ledge (32) of the skirt includes pockets (52, 54) circumferentially spaced from the cam surface of the at least one stop ledge, A radially outwardly extending flange (44) positioned to overlie at least a portion of the first ledge when the first ledge passes through the at least one stop ledge (32). The package of claim 2 comprising:   The flange (44) is between the engagement of the first ledge and the at least one stop ledge and the engagement of the second ledge and the at least one stop ledge. 6. The package of claim 5, extending circumferentially a distance so as to be located on at least a portion of the first ledge over a range of closure rotation relative to the permitted mouth.   The first ledge (76) engages the flange of the at least one stop ledge to at least inhibit significant axial movement of the closure relative to the mouth when the first ledge is received in the pocket. 6. Package according to claim 5, comprising a circumferentially extending surface (94) adapted to.   The first ledge (76) faces the flange and, when the first ledge is received in the pocket, the at least one stop ledge to at least inhibit axial movement of the closure relative to the mouth. The package of claim 6 including a circumferentially extending surface adapted to engage a flange of the device.   9. The package of claim 8, wherein adjacent surfaces of the first ledge and flange are substantially flat and parallel to each other.   The at least one stop ledge (32) extends radially and axially to engage the first ledge (76) when the closure is fully screwed into the mouth. Including a stop surface (52) and moving the closure in an axial direction against the bias of the spring element sufficient to pass a first ledge under the stop surface and the at least one stop ledge The package according to claim 1, wherein the closure cannot be removed from the mouth until the closure.   The at least one stop ledge forms at least a portion of the pocket and is adapted to engage the first ledge (76) when the closure is fully screwed into the mouth. And an axially extending stop surface (52) for biasing the closure sufficiently to allow the first ledge to pass under the stop surface and the at least one stop ledge. The package according to claim 5, wherein the closure cannot be removed from the mouth until it is moved against the axial direction.   The first ledge (76) engages the at least one stop ledge (32) and when the closure is screwed into the mouth, the first ledge is adapted to the at least one stop ledge. A cam surface (96) adapted to pass over, the cam surface extending in a circumferential direction and when the closure is screwed into the mouth, the cam surface is the radially innermost end of the cam surface The package of claim 1, wherein the package is tilted radially to first engage the at least one stop ledge and rotate toward the radially outermost end of the cammen.   The package of claim 1, comprising a spring stop (108) carried by a closure and adapted to engage the at least one spring element to limit movement of the at least one spring element.   The at least one spring element includes a resilient member (110) supported at one end by a base wall, extending axially from the base wall and tilted radially inward, wherein the spring stop is the at least one spring element 14. The package of claim 13, wherein the package is moved radially inward from the one end of the.   The package of claim 1, wherein the at least one spring element (58 or 106 or 110) is shouldered from at least one of the base wall and skirt and has a free end that is flexible and resilient.   16. Package according to claim 15, wherein the at least one spring element comprises an annular wall (58) for plug sealing / elastic engagement with the inner surface (40) of the container mouth.   The package of claim 16, wherein the inner surface (40) is conical.   18. Package according to claim 17, wherein the annular wall (58) is tilted away from the base wall and ends at an open end.   The package of claim 18, wherein the annular wall (58) includes an outer surface and an inclined surface between the outer surface and the open end.   The package of claim 15, wherein the at least one spring element comprises a plurality of circumferentially spaced spring elements (106).   16. The package of claim 15, comprising at least one backup element (108) adjacent to the at least one spring element to prevent over-deflection of the spring element.   The package of claim 1, wherein the stop ledge (32) has an upper surface disposed substantially perpendicular to the mouth axis. A child tamper-proof container comprising a cylindrical mouth (28) having an axis, an open end (30), and at least one male screw (34) provided in a first portion of the mouth adjacent to the open end In
The mouth portion is separated from the second portion spaced from the open end and the at least one male screw, spaced axially from the male screw, and protrudes radially outward from the mouth portion. At least one stop ledge (32), the stop ledge being spaced clockwise from the cam surface (50) and the first cam surface, the opening end being more than at least a portion of the cam surface. A child tamper-proof container having a radially outwardly extending flange (44) positioned closer to the child.   24. The cam surface (50) according to claim 23, wherein the cam surface (50) extends in a circumferential direction and is tilted in an axial direction such that a distance from the open end to the cam surface is greater at one end of the cam surface than at the other end. container.   25. A container according to claim 24, wherein the one end of the cam surface (50) is spaced clockwise from the other end of the cam surface.   The stop ledge (32) has a stop surface (46) spaced clockwise from the cam surface, the stop surface extending radially outward and substantially axially from the mouth. 24. A container according to claim 23.   At least a portion of the stop surface (40) is at least a portion of a pocket adapted to receive the complementary ledge to inhibit movement of the complementary ledge of the closure toward the open end of the mouth. 27. The container of claim 26, wherein the container is disposed further axially away from the open end than the flange to constitute.   24. The cam surface (50) according to claim 23, wherein the cam surface (50) extends in a circumferential direction and is inclined in a radial direction so that a distance from an axis of the mouth portion to the cam surface is larger at one end of the cam surface than at the other end. Container as described.   29. A container according to claim 28, wherein the one end of the cam surface (50) is spaced clockwise from the other end of the cam surface. A base wall (56) and a skirt (60) having a first portion adjacent to the base wall with at least one internal thread (64) for engaging at least one external thread (34) of the container mouth. A child tamper-proof closure comprising: at least one spring element (58 or 106 or 110) carried by one of said base wall and skirt;
The skirt of the closure has a second portion remote from the base wall, the second portion extending at least one pair extending radially inward from the second portion and axially spaced from the female thread. Internal ledges (76, 78)
The at least one pair of ledges of the skirt includes a first ledge (76) and a second ledge (78) spaced circumferentially from the first ledge, wherein the first ledge is A force that cooperates with the stop ledge of the container mouth to push the first skirt of the skirt under the corresponding stop ledge of the container mouth must be applied to the closure against the spring element. The second ledge cooperates with the at least one stop ledge of the container mouth to limit further screwing of the closure into the mouth. A closure for children's prank prevention package.   The first ledge (76) has a stop surface facing in one direction, the second ledge has a stop surface facing in the opposite direction to the one direction, and the stop ledge is a closure. 31. A closure according to claim 30, which limits rotation in the opposite direction.   32. A closure according to claim 31, wherein the stop surface of the first ledge (76) faces counterclockwise and the stop surface of the second ledge faces clockwise.   31. A closure according to claim 30, wherein the first ledge (76) has a cam surface (96) extending in the circumferential direction and inclined in the axial direction.   31. A closure according to claim 30, wherein the first ledge (76) has a cam surface (96) extending circumferentially and inclined in a radial direction.   31. A closure according to claim 30, wherein the at least one spring element (58 or 106 or 110) is shouldered from at least one of the base wall and skirt and has a free end that is flexible and resilient.   36. A closure according to claim 35, wherein the at least one spring element comprises an annular wall (58) for plug sealing / elastic engagement with the inner surface (40) of the container mouth.   37. A closure according to claim 36, wherein the inner surface (40) is conical.   38. A closure according to claim 37, wherein the annular wall (58) is inclined in the opposite direction from the base wall and ends at an open end.   39. A closure according to claim 38, wherein the annular wall (58) includes an outer surface and an inclined surface between the outer surface and the open end.   36. A closure according to claim 35, wherein the at least one spring element comprises a plurality of circumferentially spaced spring elements (106).   36. A closure according to claim 35, comprising at least one backup element (108) adjacent to the at least one spring element to prevent over-deflection of the spring element.

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