EP2028123A1 - A safety closure - Google Patents
A safety closure Download PDFInfo
- Publication number
- EP2028123A1 EP2028123A1 EP08252318A EP08252318A EP2028123A1 EP 2028123 A1 EP2028123 A1 EP 2028123A1 EP 08252318 A EP08252318 A EP 08252318A EP 08252318 A EP08252318 A EP 08252318A EP 2028123 A1 EP2028123 A1 EP 2028123A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- closure
- cap
- transmission member
- force transmission
- inner cap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D50/00—Closures with means for discouraging unauthorised opening or removal thereof, with or without indicating means, e.g. child-proof closures
- B65D50/02—Closures with means for discouraging unauthorised opening or removal thereof, with or without indicating means, e.g. child-proof closures openable or removable by the combination of plural actions
- B65D50/04—Closures with means for discouraging unauthorised opening or removal thereof, with or without indicating means, e.g. child-proof closures openable or removable by the combination of plural actions requiring the combination of simultaneous actions, e.g. depressing and turning, lifting and turning, maintaining a part and turning another one
- B65D50/041—Closures with means for discouraging unauthorised opening or removal thereof, with or without indicating means, e.g. child-proof closures openable or removable by the combination of plural actions requiring the combination of simultaneous actions, e.g. depressing and turning, lifting and turning, maintaining a part and turning another one the closure comprising nested inner and outer caps or an inner cap and an outer coaxial annular member, which can be brought into engagement to enable removal by rotation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D51/00—Closures not otherwise provided for
- B65D51/24—Closures not otherwise provided for combined or co-operating with auxiliary devices for non-closing purposes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2215/00—Child-proof means
- B65D2215/02—Child-proof means requiring the combination of simultaneous actions
Definitions
- the present invention relates to the field of closures for containers, and more particularly to safety closures which can be applied and removed easily from a container with knowledge of its operation, but which is protected from removal by children.
- the container be provided with a closure that cannot be removed by children, but which can be removed readily by those familiar with the manner of operation of the closure including, for example, the elderly or the handicapped.
- Safety closures have been known for many years and generally comprise two component parts, namely an inner and outer shell.
- a typical safety closure is disclosed in GB1529707 , which describes a safety closure cap for sealing a container, the cap comprising an outer shell, an inner shell and a ratchet arrangement.
- the ratchet arrangement couples the shells together when turned in a cap applying direction, and permits relative rotation between the shells in a cap-unscrewing direction. It is possible to unscrew the closure in response to a predetermined finger pressure directed radially inwards on the skirt of the outer shell, which for causes the shells to turn together so as to unscrew the inner shell from the container.
- a safety closure for a container comprising: an inner cap having engagement means for engaging a container; and a force transmission member operable to provide friction against an exterior surface of the inner cap upon application of an inwardly directed force whereby in use the force transmission member provides sufficient friction to disengage the inner cap engagement means and to enable indirect removal thereof from a container.
- a safety closure formed in accordance with the present invention utilises the frictional forces generated at the exterior of the inner cap.
- the interaction between the force transmission member and the inner cap may be characterised by an absence of mechanical engagement.
- the force generated to remove the inner cap is achieved substantially entirely by frictional forces at the interface.
- the closure may comprise an outer cap.
- the force transmission member comprises the outer cap.
- the force transmission member may be formed as part of an outer cap.
- the member may comprise one or more high friction pads which can be brought selectively into contact with the inner cap.
- the force transmission member may be formed as a liner, coating or the like for the outer cap.
- At least part of the force transmission member may be formed as a coating on the inner cap.
- inner and outer caps prefferably be provided and for both to include corresponding high friction components which can be brought into contact to enable the transmission of force.
- the outer cap may rotate freely about the inner cap imparting little, or no, frictional torque on the surface of the inner cap. This can result in a child-resistant closure which nevertheless still allows the elderly or handicapped to remove the inner cap.
- the force transmission member may form at least part of the outer cap.
- the present invention envisages, therefore, that the member may be constituted by the material, for example, of the outer cap.
- the member and outer cap may be formed integrally or formed as separate components.
- the frictional medium is constituted by the material forming the outer cap, it would be the frictional force exerted by the surfaces of the inner and outer caps as they attempt to move relative to one another which would be of relevance.
- the force transmission member may be a separate component attached to the outer cap. It may be attached by way of adhesive, for example, or other attachment means. Having the member as a separate component may simplify the manufacturing process of the safety closure because the member may be attached to an outer cap of standard specification which is readily available. There is also the possibility of installing a member on pre-existing outer and/or inner caps to arrive at a safety closure formed in accordance with the present invention. This may be considered as a retro-fitting installation of the member as a separate component.
- the exterior surface of at least part of the inner cap may be substantially smooth.
- the interior surface of at least part of the force transmission member may be substantially smooth.
- the exterior surface of the inner cap and the interior surface of the transmission member are smooth at least in the areas over which frictional engagement will occur.
- the inner cap engagement means may comprise screw thread formations. Accordingly a rotational movement accompanying the application of inward force could be used to unscrew the inner cap.
- Other engagement means such as clips and snap beads may also be used.
- both elements may be rotated simultaneously as one unit about the container to effect the application or removal of the safety closure to/from the container.
- a clamping force between the force transmission member and the inner cap allows the inner cap to be indirectly removed from the container.
- the inwardly directed force may include a radial component.
- an axial component may be required.
- the force transmission member may be biased to a non-contact position and urgable to a contact position with respect to the inner cap. Movement of the member may be caused by directly applying force to it, or by indirectly applying force, for example via an outer cap.
- the force transmission member may be deformable.
- At least part of the outer cap may be deformable.
- the outer cap may comprise a wall having selected regions of reduced thickness to facilitate deformation thereof.
- the outer cap may be formed from plastics material such as polyethylene or polypropylene.
- the inner cap may be formed from a variety of materials, such as metal or a plastics material, for example.
- the inner cap may be formed from aluminium, which has many desirable properties including it being lightweight, corrosion resistant, ductile, impermeable, and recyclable.
- the surface of aluminium also offers a significant co-efficient of friction when brought into contact with the surface of other materials, such as those materials which constitute the friction medium or from which the friction medium is formed.
- the force transmission member may comprise or include a number of appropriate materials, such as a plastics material, a rubber material, a thermoplastic elastomeric material, and silicone. Materials of this nature are considered to exhibit a sufficient co-efficient friction for them to be utilised as part of a safety closure formed in accordance with the present invention.
- the safety closure may further comprise tamper-evident means which make it possible to establish whether the contents of the container have remained secure before reaching and being used by the intended user.
- a safety closure for a container comprising a threaded inner cap which engages the container, an outer cap which at least partially houses the said inner cap, and a friction medium associated with the said outer cap, the friction medium being operable to exhibit a co-efficient of friction between itself and an exterior surface of the inner cap sufficient to enable the inner and outer caps to be rotated simultaneously about the container upon bringing the friction medium into contact with the exterior surface of the inner cap by application of an inwardly radical force on an exterior surface of the outer cap.
- a container provided with a safety closure as described herein.
- a force transmission member for a safety cap comprising a force transmission as described herein.
- the force transmission member may form part of an outer cap.
- FIG. 1 there is shown the component parts of a safety closure generally indicated 10 and formed in accordance with the present invention.
- the closure 10 comprises an aluminium inner cap 15 and a plastic outer cap 20.
- the inner cap 15 comprises a disc-shape top plate 16 from the periphery of which depends a generally cylindrical side wall 17.
- the interior of the side wall 17 is provided with engagement means in the form of screw thread formations 18.
- the outer cap 20 comprises a disc-shape top plate 21 from the periphery of which depends a generally cylindrical side wall 22.
- the interior of the cap 20 is provided with a force transmission member in the form of a liner 23.
- the liner 23 is formed from a thermoplastic elastomer material and accordingly has a high coefficient of friction.
- the liner 23 extends over the underside of the top plate 21 and around the interior of the side wall 22 and is secured by any suitable means such as adhesion or as a result of bi-injection moulding.
- the free end of the side wall 22 comprises an annular upturned flap 24 the purpose of which is described in more detail below.
- FIG. 2 the inner and outer caps 15, 20 are shown assembled into the closure 10.
- the inner cap 15 is received into the outer cap 20 so that the free end of the side wall 17 engages above the flap 24 to hold the cap 15 firmly within the cap 20.
- Relative axial movement between the caps 15, 20 is thereby restricted but relative rotational movement is permitted by virtue of the clearance gap 25 between the caps 15,20.
- the closure 10 is shown presented to a container neck 30 having external screw thread formations 31.
- closure 10 is shown applied to the container neck 30.
- the closure may be applied either with the inner and outer caps 15, 20 assembled as shown, or in two stages i.e. the inner cap 15 is applied to the neck 30 first and the outer cap 20 is applied over the inner cap 15.
- the side wall 22 In order to remove the inner cap 15 the side wall 22 must be inwardly deformed as shown in Figure 4 .
- the inward deformation causes the liner 23 to be pressed against the side wall 17 at points X.
- the side wall 17 can be provided with localised weakening or strengthening relative to the remainder of the side wall.
- the closure 10 can be re-applied by reversing the above operation.
- closure 110 formed according to an alternative embodiment.
- the closure 110 comprises an inner cap 115 and an outer cap 120 and in this respect is similar to the closure 10 shown in Figure 2 .
- the inner cap 115 includes a cover 123 formed from a thermoplastic elastomer.
- the operation of the closure 110 is very similar to that of the closure 10. In this case when the side wall 122 is depressed the inner surface of the outer cap 120 is pressed against the cover 123. This creates friction between the inner and outer caps to allow the inner cap to be removed and replace by rotation.
- closure 210 formed according to an alternative embodiment.
- the closure 210 comprises a metal inner cap 215 and a plastics outer cap 220.
- the outer cap 220 comprises a generally cylindrical upper portion 235 including the top plate 221 and a side wall 236 and a generally hexagonal lower skirt 240 depending therefrom.
- the skirt 240 is of greater diameter than the upper portion side wall 236 and is connected thereto by six radial spokes 237.
- Three of the six sides of the skirt 240 include arcuate bulges 241 which press against the inner cap side wall 217 to prevent inward flexing and to brace the skirt 240 against the wall 217.
- the other three sides of the lower skirt 240 are provided with force transmission members 242 in a triangular configuration.
- the members 242 have an interior and an exterior component.
- the interior component comprises a rectangular pad 243 and the exterior component comprises three spaced ribs 244.
- the members 242 are formed together as a single moulded unit which extends into the upper part as legs 245 each of which extend over the upper part side wall 236 and then under the top plate 221, where they terminate at a central disc 246 that projects through an aperture 247 in the top plate 221.
- the sides of the skirt 240 which have the force transmission members 242 are not restricted by arcuate bulges and can therefore flex inwardly between adjacent spokes.
- the skirt 240 is gripped and inward pressure is applied at the three points defined by the ribs 244. Radially inward force pushes the skirt side inwards and consequently pushes the pads 243 against the inner cap side wall 217. Rotation movement of the outer cap 220 causes co-rotation of the inner cap 215.
- a generally frusto-conical dosing cap 250 is shown upturned and fitted onto the outer cap 220 (shown without the inner cap). The cap is fitted onto the upper portion 235. The open end of the cap 250 is shaped to fit tightly onto the portion 235 so that it can be retained during non-use.
- closure 310 formed according to an alternative embodiment.
- the closure 310 is similar to the closure 210 with the following differences.
- the skirt 340 is split into three arcuate segments 340a, 340b, 340c which are separated by three windows 355a, 355b, 355c. Each segment is connected to the upper part side wall 336 and at its free end has its own ledge 324 for retaining the inner cap 315.
- a force transmission member is provided in the form of a one piece castellated moulded part 360.
- the member 360 comprises three rectangular pads 361 a, 361 b, 361c which extend across the windows 355a, 355b, 355c. At the base of the pads are link arms 356a, 356b, 356c which allows the part to be moulded in one piece. The exterior of the pads include ribs 357 which help with grip.
- the part is moulded from an elastomeric material with a high coefficient of friction. Accordingly, the pads can be flexed into the windows where they can contact the exterior surface of the inner cap 315.
- the operation of the closure is then identical to the closure 210 in that the pads are depressed and then the inner cap can be rotated.
- the outer part 320 is shown fitted with a dosing cap 350 which is identical to the cap 250 and also fits onto the upper portion 335.
- closure 410 formed according to an alternative embodiment.
- the closure comprises an inner cap 415 and an outer cap 460.
- there is no separate force transmission member because the outer cap 460 is the member; the cap is in effect an overcap.
- the cap 460 is formed from an elastomeric material and comprises a top plate 461 and a depending side wall 462 which terminates with a segmented annular ledge 424.
- the inner cap 415 is identical to the caps 215, 315 and is received into the outer cap where it is retained by the ledge 424.
- the cap 460 is oversized so that it can rotate free on the inner cap 415 in the absence of any inward force.
- the windows define five pressing regions on the side wall 462 and help to allow the regions to flex in use.
- radially inward pressure is applied to the side wall 462 so that a clamping force is applied to the inner cap 415 by the outer cap 460. This allow the outer cap 460 to be used to remove the inner cap from a container (not shown).
- the periphery of the top plate 461 is provided with five upstanding equally spaced pods 464.
- the pods 464 are arranged so that the mouth of a dosing cap 450 can be fitted over their peripheries to hold it firmly in place.
Abstract
Description
- The present invention relates to the field of closures for containers, and more particularly to safety closures which can be applied and removed easily from a container with knowledge of its operation, but which is protected from removal by children.
- In the packaging of many household commodities, such as medicines, it is highly desirable that the container be provided with a closure that cannot be removed by children, but which can be removed readily by those familiar with the manner of operation of the closure including, for example, the elderly or the handicapped.
- Safety closures have been known for many years and generally comprise two component parts, namely an inner and outer shell. A typical safety closure is disclosed in
GB1529707 - Other known safety closures generally require a downwardly directed pressure on the outer shell so as to activate the ratchet mechanism in conjunction with a rotation action in order to effect the removal of the said closure from the container. Such a removal, therefore, makes it necessary to apply force in two different directions together to remove the closure.
- In many cases it would be desirable to use a metal closure to form the inner cap. However, standard metal closures tend not to have sharp edges against which an outer closure can bear to transmit an unscrewing force.
- Whilst conventional safety closures provide adequate protection against inadvertent removal of a closure from a container, such as a medicine bottle, for example, they are, nevertheless, unnecessarily complicated by virtue of their reliance upon an interlocking mechanical engagement between the inner and outer shells to actuate the removal of the closure from the container. From the discussion that is to follow, it will become apparent how the safety closure formed in accordance with the present invention addresses the deficiencies associated with the prior art, whilst providing numerous additional advantages not hitherto contemplated or possible with prior art constructions.
- According to a first aspect of the present invention, there is provided a safety closure for a container, the closure comprising: an inner cap having engagement means for engaging a container; and a force transmission member operable to provide friction against an exterior surface of the inner cap upon application of an inwardly directed force whereby in use the force transmission member provides sufficient friction to disengage the inner cap engagement means and to enable indirect removal thereof from a container.
- In contrast to prior art constructions, a safety closure formed in accordance with the present invention utilises the frictional forces generated at the exterior of the inner cap.
- The interaction between the force transmission member and the inner cap may be characterised by an absence of mechanical engagement. In other words, the force generated to remove the inner cap is achieved substantially entirely by frictional forces at the interface.
- The closure may comprise an outer cap. In some embodiments the force transmission member comprises the outer cap.
- The force transmission member may be formed as part of an outer cap. For example, the member may comprise one or more high friction pads which can be brought selectively into contact with the inner cap.
- The force transmission member may be formed as a liner, coating or the like for the outer cap.
- Alternatively or additionally at least part of the force transmission member may be formed as a coating on the inner cap.
- It is possible for inner and outer caps to be provided and for both to include corresponding high friction components which can be brought into contact to enable the transmission of force.
- Without the application of an inward force (such as pushing or squeezing) on the exterior surface of the outer cap, the outer cap may rotate freely about the inner cap imparting little, or no, frictional torque on the surface of the inner cap. This can result in a child-resistant closure which nevertheless still allows the elderly or handicapped to remove the inner cap.
- The force transmission member may form at least part of the outer cap. The present invention envisages, therefore, that the member may be constituted by the material, for example, of the outer cap.
- The member and outer cap may be formed integrally or formed as separate components.
- Where the frictional medium is constituted by the material forming the outer cap, it would be the frictional force exerted by the surfaces of the inner and outer caps as they attempt to move relative to one another which would be of relevance.
- It may be that the entire outer cap is formed from the friction medium. Alternatively, only certain regions of the outer cap may be formed from the member. This may be preferred where substantial savings in terms of expense can be made if the outer cap is formed as a composite comprising a less expensive material forming the majority of the outer cap and a more expensive member material making up a minority of the outer cap.
The force transmission member may be a separate component attached to the outer cap. It may be attached by way of adhesive, for example, or other attachment means. Having the member as a separate component may simplify the manufacturing process of the safety closure because the member may be attached to an outer cap of standard specification which is readily available. There is also the possibility of installing a member on pre-existing outer and/or inner caps to arrive at a safety closure formed in accordance with the present invention. This may be considered as a retro-fitting installation of the member as a separate component. - The exterior surface of at least part of the inner cap may be substantially smooth. The interior surface of at least part of the force transmission member may be substantially smooth. In some embodiments the exterior surface of the inner cap and the interior surface of the transmission member are smooth at least in the areas over which frictional engagement will occur.
- The inner cap engagement means may comprise screw thread formations. Accordingly a rotational movement accompanying the application of inward force could be used to unscrew the inner cap. Other engagement means such as clips and snap beads may also be used.
- In embodiments where the force transmission member is pressed, or squeezed, against the inner cap, both elements may be rotated simultaneously as one unit about the container to effect the application or removal of the safety closure to/from the container. To this end, there is no requirement for any mechanical interengagement to provide a mechanism for turning; the frictional force that exists being sufficient to accomplish this objective. A clamping force between the force transmission member and the inner cap allows the inner cap to be indirectly removed from the container.
- The inwardly directed force may include a radial component. Alternatively or additionally an axial component may be required.
- The force transmission member may be biased to a non-contact position and urgable to a contact position with respect to the inner cap. Movement of the member may be caused by directly applying force to it, or by indirectly applying force, for example via an outer cap.
- The force transmission member may be deformable.
- At least part of the outer cap may be deformable. The outer cap may comprise a wall having selected regions of reduced thickness to facilitate deformation thereof.
- The outer cap may be formed from plastics material such as polyethylene or polypropylene.
- The inner cap may be formed from a variety of materials, such as metal or a plastics material, for example. In embodiments, the inner cap may be formed from aluminium, which has many desirable properties including it being lightweight, corrosion resistant, ductile, impermeable, and recyclable. The surface of aluminium also offers a significant co-efficient of friction when brought into contact with the surface of other materials, such as those materials which constitute the friction medium or from which the friction medium is formed.
- The force transmission member may comprise or include a number of appropriate materials, such as a plastics material, a rubber material, a thermoplastic elastomeric material, and silicone. Materials of this nature are considered to exhibit a sufficient co-efficient friction for them to be utilised as part of a safety closure formed in accordance with the present invention.
- The safety closure may further comprise tamper-evident means which make it possible to establish whether the contents of the container have remained secure before reaching and being used by the intended user.
According to an alternative aspect there is provided a safety closure for a container, comprising a threaded inner cap which engages the container, an outer cap which at least partially houses the said inner cap, and a friction medium associated with the said outer cap, the friction medium being operable to exhibit a co-efficient of friction between itself and an exterior surface of the inner cap sufficient to enable the inner and outer caps to be rotated simultaneously about the container upon bringing the friction medium into contact with the exterior surface of the inner cap by application of an inwardly radical force on an exterior surface of the outer cap. - According to a further aspect there is provided a container provided with a safety closure as described herein.
- According to an alternative aspect of the present invention there is provided a force transmission member for a safety cap, comprising a force transmission as described herein.
- The force transmission member may form part of an outer cap.
- The present invention will now be more particularly described, by way of example, with reference to the accompanying drawings, in which:
-
Figure 1 is a section of an inner and outer cap together forming a safety closure in accordance with the present invention; -
Figure 2 is a section of the inner and outer caps ofFigure 1 shown assembled into a safety closure and presented to a container neck; -
Figure 3 is a section of the safety closure ofFigure 2 shown assembled onto the container neck; -
Figure 4 is a section of the safety closure ofFigure 3 shown with the outer cap sidewall depressed towards the inner cap to facilitate the removal thereof; -
Figure 5 is a section of a safety closure formed according to an alternative embodiment; -
Figure 6 is a side elevation of a safety closure formed according to an alternative embodiment; -
Figure 7 is an underplan view of the closureFigure 6 ; -
Figure 8 is a plan view of the closure ofFigure 6 ; -
Figure 9 is a section of the closure ofFigure 8 taken along line A-A; -
Figure 10 is a perspective view of an outer cap part of the closure ofFigure 6 shown with an accompanying dosing cap; -
Figure 11 is a side elevation of a safety closure formed according to an alternative embodiment; -
Figure 12 is an underplan view of the closure ofFigure 11 ; -
Figure 13 is a plan view of the closure ofFigure 11 ; -
Figure 14 is a section of the closure ofFigure 13 taken along line B-B; -
Figure 15 is a perspective view of an outer part of the closure ofFigure 11 shown with an associated dosing cap; -
Figure 16 is a side elevation of a safety closure formed according to an alternative embodiment; -
Figure 17 is an underplan view of the closure ofFigure 16 ; -
Figure 18 is a plan view of the closure ofFigure 16 ; -
Figure 19 is a section of the closure ofFigure 18 taken along line C-C; and -
Figure 20 is a perspective view of the closure ofFigure 16 shown with an associated dosing cap. - Referring first to
Figure 1 there is shown the component parts of a safety closure generally indicated 10 and formed in accordance with the present invention. - The
closure 10 comprises an aluminiuminner cap 15 and a plasticouter cap 20. - The
inner cap 15 comprises a disc-shape top plate 16 from the periphery of which depends a generallycylindrical side wall 17. The interior of theside wall 17 is provided with engagement means in the form ofscrew thread formations 18. - The
outer cap 20 comprises a disc-shape top plate 21 from the periphery of which depends a generallycylindrical side wall 22. The interior of thecap 20 is provided with a force transmission member in the form of aliner 23. Theliner 23 is formed from a thermoplastic elastomer material and accordingly has a high coefficient of friction. Theliner 23 extends over the underside of thetop plate 21 and around the interior of theside wall 22 and is secured by any suitable means such as adhesion or as a result of bi-injection moulding. The free end of theside wall 22 comprises an annularupturned flap 24 the purpose of which is described in more detail below. - Referring now to
Figure 2 the inner andouter caps closure 10. Theinner cap 15 is received into theouter cap 20 so that the free end of theside wall 17 engages above theflap 24 to hold thecap 15 firmly within thecap 20. Relative axial movement between thecaps clearance gap 25 between thecaps - The
closure 10 is shown presented to acontainer neck 30 having externalscrew thread formations 31. - Referring now to
Figure 3 theclosure 10 is shown applied to thecontainer neck 30. In practice the closure may be applied either with the inner andouter caps inner cap 15 is applied to theneck 30 first and theouter cap 20 is applied over theinner cap 15. - With the
closure 10 applied the container neck is closed. If theouter cap 20 is rotated it spins freely on the inner cap because of thegap 25 and because the outer surface of thecap 15 is smooth. There is therefore little or no friction between thecaps - In order to remove the
inner cap 15 theside wall 22 must be inwardly deformed as shown inFigure 4 . The inward deformation causes theliner 23 to be pressed against theside wall 17 at points X. In order to facilitate the deformation theside wall 17 can be provided with localised weakening or strengthening relative to the remainder of the side wall. - With the
side wall 22 depressed theinner cap 15 can now be rotated using theouter cap 20, with theliner 23 acting as a torque transmission medium. - The
closure 10 can be re-applied by reversing the above operation. - Referring now to
Figure 5 there is shown aclosure 110 formed according to an alternative embodiment. - The
closure 110 comprises aninner cap 115 and anouter cap 120 and in this respect is similar to theclosure 10 shown inFigure 2 . - In this embodiment the
inner cap 115 includes acover 123 formed from a thermoplastic elastomer. The operation of theclosure 110 is very similar to that of theclosure 10. In this case when theside wall 122 is depressed the inner surface of theouter cap 120 is pressed against thecover 123. This creates friction between the inner and outer caps to allow the inner cap to be removed and replace by rotation. - Referring now to
Figures 6 to 9 there is shown aclosure 210 formed according to an alternative embodiment. - The
closure 210 comprises a metalinner cap 215 and a plasticsouter cap 220. - The
outer cap 220 comprises a generally cylindricalupper portion 235 including thetop plate 221 and aside wall 236 and a generally hexagonallower skirt 240 depending therefrom. Theskirt 240 is of greater diameter than the upperportion side wall 236 and is connected thereto by sixradial spokes 237. - Three of the six sides of the
skirt 240 includearcuate bulges 241 which press against the innercap side wall 217 to prevent inward flexing and to brace theskirt 240 against thewall 217. The other three sides of thelower skirt 240 are provided withforce transmission members 242 in a triangular configuration. - The
members 242 have an interior and an exterior component. The interior component comprises arectangular pad 243 and the exterior component comprises three spacedribs 244. Themembers 242 are formed together as a single moulded unit which extends into the upper part aslegs 245 each of which extend over the upperpart side wall 236 and then under thetop plate 221, where they terminate at acentral disc 246 that projects through anaperture 247 in thetop plate 221. - The sides of the
skirt 240 which have theforce transmission members 242 are not restricted by arcuate bulges and can therefore flex inwardly between adjacent spokes. In use theskirt 240 is gripped and inward pressure is applied at the three points defined by theribs 244. Radially inward force pushes the skirt side inwards and consequently pushes thepads 243 against the innercap side wall 217. Rotation movement of theouter cap 220 causes co-rotation of theinner cap 215. - In
Figure 10 a generally frusto-conical dosing cap 250 is shown upturned and fitted onto the outer cap 220 (shown without the inner cap). The cap is fitted onto theupper portion 235. The open end of thecap 250 is shaped to fit tightly onto theportion 235 so that it can be retained during non-use. - Referring now to
Figure 11 to 14 there is shown aclosure 310 formed according to an alternative embodiment. Theclosure 310 is similar to theclosure 210 with the following differences. - The
skirt 340 is split into threearcuate segments windows 355a, 355b, 355c. Each segment is connected to the upper part side wall 336 and at its free end has itsown ledge 324 for retaining theinner cap 315. - A force transmission member is provided in the form of a one piece castellated
moulded part 360. - The
member 360 comprises threerectangular pads windows 355a, 355b, 355c. At the base of the pads arelink arms ribs 357 which help with grip. - The part is moulded from an elastomeric material with a high coefficient of friction. Accordingly, the pads can be flexed into the windows where they can contact the exterior surface of the
inner cap 315. The operation of the closure is then identical to theclosure 210 in that the pads are depressed and then the inner cap can be rotated. - Referring now to
Figure 15 the outer part 320 is shown fitted with adosing cap 350 which is identical to thecap 250 and also fits onto theupper portion 335. - Referring now to
Figures 16 to 19 there is shown aclosure 410 formed according to an alternative embodiment. - The closure comprises an
inner cap 415 and anouter cap 460. In this embodiment there is no separate force transmission member because theouter cap 460 is the member; the cap is in effect an overcap. Thecap 460 is formed from an elastomeric material and comprises atop plate 461 and a dependingside wall 462 which terminates with a segmentedannular ledge 424. - The
inner cap 415 is identical to thecaps ledge 424. - The
cap 460 is oversized so that it can rotate free on theinner cap 415 in the absence of any inward force. - At the intersection of the
top plate 461 and theside wall 462 five circumferentially spacedwindows 463 are formed. The windows define five pressing regions on theside wall 462 and help to allow the regions to flex in use. - In use radially inward pressure is applied to the
side wall 462 so that a clamping force is applied to theinner cap 415 by theouter cap 460. This allow theouter cap 460 to be used to remove the inner cap from a container (not shown). - Referring now also to
Figure 20 , the periphery of thetop plate 461 is provided with five upstanding equally spacedpods 464. Thepods 464 are arranged so that the mouth of adosing cap 450 can be fitted over their peripheries to hold it firmly in place.
Claims (15)
- A safety closure for a container, the closure comprising: an inner cap having engagement means for engaging a container; and a force transmission member operable to provide friction against an exterior surface of the inner cap upon application of an inwardly directed force, whereby in use the force transmission member provides sufficient friction to disengage the inner cap engagement means and to enable indirect removal thereof from a container.
- A closure as claimed in Claim 1, in which the closure comprises an outer cap.
- A closure as claimed in Claim 1 or Claim 2, wherein at least part of the outer cap is deformable by the inwardly directed force.
- A safety closure as claimed in Claim 3, wherein the outer cap comprises a wall having selected regions of reduced thickness to facilitate deformation thereof.
- A closure as claimed in any preceding claim, in which the outer cap is formed from plastics material.
- A closure as claimed in Claim 2, in which the force transmission member comprises the outer cap.
- A closure as claimed in any of Claims 2 to 5, in which the force transmission member is formed as part of the outer cap.
- A closure as claimed in any of Claims 2 to 6, in which the force transmission member is formed as a liner for the outer cap.
- A closure as claimed in Claim 1 or Claim 2, in which the force transmission member is formed as a coating on the inner cap.
- A closure as claimed in any preceding claim, in which the exterior surface of at least part of the inner cap and/or the interior surface of at lest part of the force transmission member is substantially smooth.
- A closure as claimed in any preceding claim, in which the inner cap engagement means comprise screw thread formations.
- A safety closure as claimed in any preceding claim, wherein the inner cap is formed from metal.
- A safety closure as claimed in any preceding claim, wherein the force transmission member comprises or includes a plastics material.
- A safety closure as claimed in any preceding claim, wherein the force transmission member comprises or includes an elastomeric material.
- A safety closure as claimed in any preceding claim, wherein the force transmission member comprises or includes a thermoplastic elastomeric material.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB0715983.3A GB0715983D0 (en) | 2007-08-16 | 2007-08-16 | A Saftey closure |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2028123A1 true EP2028123A1 (en) | 2009-02-25 |
EP2028123B1 EP2028123B1 (en) | 2010-05-26 |
Family
ID=38566488
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08252318A Not-in-force EP2028123B1 (en) | 2007-08-16 | 2008-07-07 | A safety closure |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2028123B1 (en) |
AT (1) | ATE469048T1 (en) |
DE (1) | DE602008001339D1 (en) |
GB (1) | GB0715983D0 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108891760A (en) * | 2018-08-16 | 2018-11-27 | 安徽金星包装有限公司 | It is a kind of to facilitate recycling aluminium-plastic combined cover |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2881934A (en) | 1956-10-22 | 1959-04-14 | Gilbert L Rhodes | Safety bottle closure |
US3027035A (en) | 1958-05-13 | 1962-03-27 | Jacquelyn L Farago | Safety closure for containers and the like |
CH571980A5 (en) | 1974-11-21 | 1976-01-30 | Kaiser Ernst | Child proof bottle cap - has outer section squeezed into engagement with roughened surface of inner one |
DE2548349A1 (en) * | 1975-10-29 | 1977-05-12 | Krautkraemer Guenter Dipl Rer | Childproof, two-piece, screwed cap assembly for drug containers - which is manufactured as a one piece injection moulding |
GB1529707A (en) | 1974-10-17 | 1978-10-25 | Anchor Hocking Corp | Safety closure cap |
EP0123810A1 (en) * | 1983-04-29 | 1984-11-07 | WASSILIEFF, Victor | Child-resistant closure |
-
2007
- 2007-08-16 GB GBGB0715983.3A patent/GB0715983D0/en not_active Ceased
-
2008
- 2008-07-07 DE DE602008001339T patent/DE602008001339D1/en active Active
- 2008-07-07 AT AT08252318T patent/ATE469048T1/en not_active IP Right Cessation
- 2008-07-07 EP EP08252318A patent/EP2028123B1/en not_active Not-in-force
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2881934A (en) | 1956-10-22 | 1959-04-14 | Gilbert L Rhodes | Safety bottle closure |
US3027035A (en) | 1958-05-13 | 1962-03-27 | Jacquelyn L Farago | Safety closure for containers and the like |
GB1529707A (en) | 1974-10-17 | 1978-10-25 | Anchor Hocking Corp | Safety closure cap |
CH571980A5 (en) | 1974-11-21 | 1976-01-30 | Kaiser Ernst | Child proof bottle cap - has outer section squeezed into engagement with roughened surface of inner one |
DE2548349A1 (en) * | 1975-10-29 | 1977-05-12 | Krautkraemer Guenter Dipl Rer | Childproof, two-piece, screwed cap assembly for drug containers - which is manufactured as a one piece injection moulding |
EP0123810A1 (en) * | 1983-04-29 | 1984-11-07 | WASSILIEFF, Victor | Child-resistant closure |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108891760A (en) * | 2018-08-16 | 2018-11-27 | 安徽金星包装有限公司 | It is a kind of to facilitate recycling aluminium-plastic combined cover |
Also Published As
Publication number | Publication date |
---|---|
GB0715983D0 (en) | 2007-09-26 |
ATE469048T1 (en) | 2010-06-15 |
DE602008001339D1 (en) | 2010-07-08 |
EP2028123B1 (en) | 2010-05-26 |
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