EP0078292B1 - Safety closure containers - Google Patents
Safety closure containers Download PDFInfo
- Publication number
- EP0078292B1 EP0078292B1 EP82901509A EP82901509A EP0078292B1 EP 0078292 B1 EP0078292 B1 EP 0078292B1 EP 82901509 A EP82901509 A EP 82901509A EP 82901509 A EP82901509 A EP 82901509A EP 0078292 B1 EP0078292 B1 EP 0078292B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cap
- inner cap
- outer cap
- top end
- end wall
- 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.)
- Expired
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Classifications
-
- 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
Definitions
- This invention relates to safety closures for containers which can be readily applied and removed by one having knowledge of their operation, and which are relatively safe in the hands of children because they are usually unable to manipulate the closures in the required manner to remove them from the containers.
- plastic bottles contain aggressive liquids, such as e.g. chlorine bleaching water. Production methods for such bottles cannot avoid the irregularities around the neck opening of these bottles, thereby creating sometimes serious difficulties because of liquid crystallization as a result of leakage. If the space between an inner and outer cap of an existing safety closure would be filled with crystals, the safety aspect of the closure would be endangered as this could unexpectedly cause an engagement between the several parts of the closure, enabling unauthorized removal thereof.
- aggressive liquids such as e.g. chlorine bleaching water.
- a safety closure according to the invention is of a type as indicated in the introductory statement of the attached claim 1, which type is known as such from FR-A-2 079 409, in particular Fig. 8.
- This publication shows a bayonet joint between inner and outer cap, the lips and the recessed space being provided in an axial zone of the closure separate from and above the container fastening means on the inner cap, which, as usual, consisted of an internal screw-threaded part in the inner cap.
- This invention aims at providing an improvement of such known safety closures, combining safety and reliability also after long periods of storing and use with a simple, inexpensive and short structure.
- a safety closure according to the introductory statement of the attached claim 1 is according to the invention characterised in that the outer wall of said recessed space extends downwardly from the top of the outer skirt of the inner cap so as to allow taking up the mouth of the container in the space radially between said outer skirt and said outer wall of said recessed space.
- the application of the invention allows a reliable structure of the closure to have a length not more than the length of the container fastening means in the outer skirt of the inner cap plus the axial stroke of depression of the outer cap with respect to the inner cap for causing interengagement of the protruding parts to allow removal of the closure, plus the wall thickness of the terminal wall of the outer cap and the wall thickness of the inner cap where its outer skirt merges into said recessed part, notwithstanding the application of long resilient lips and a correspondingly deep recessed space in the inner cap cooperating therewith.
- the sealing between the container and the closure becomes much more reliable.
- the outer cap is guided on the inner cap by their closely surrounding outer skirts and by the contact between the resilient lips and the wall of the recessed space.
- the terminal wall of the inner cap is in one plane with and engaging in a central opening of the terminal wall of the outer cap.
- this central opening should be so wide as not to jam onto this conical wall when depressing the outer cap axially to allow unscrewing of the closure, so that this opening does not give much guidance of the inner cap by the outer cap in non- depressed condition of the outer cap and in the depressing movement of the outer cap.
- This is a disadvantage, which is removed in a preferred embodiment of the closure according to the invention by applying the features of the attached claim 2.
- the recessed space according to the invention should be of the smallest possible radial extent to allow the mouth of the container to surround at least the greater part of this space, such a cylindrical central portion of the inner cap near its top end wall is also favourable for keeping this radial extent as small as possible.
- a safety closure 1 embodying the present invention and comprising an outer cap, indicated generally at 2, overlying an inner cap, indicated generally at 3, with the inner and outer caps being concentrically aligned.
- a generally cylindrical skirt 104 of the inner cap 103 is formed with a container fastening means such as a helical screw thread 105.
- one or more teeth, indicated generally at 106, on the skirt portion 104 of the inner cap 103 project radially and generally coaxially outwardly for engagement with one or more teeth, indicated generally at 107, on the inner side of a depending generally cylindrically shaped skirt position 108 of the outer cap 102.
- the cooperating teeth 106 and 107 are shown in a vertical position. However, they may instead also be placed in a generally sloping position under say 45°.
- the upper portion of the inner cap 103 is further shaped in such a manner that an upper container rim is received in the circumferential space 109 created by the skirt portion 104 being turned back axially at 110.
- the central upper portion 111 of the inner cap 103 is of cylindrical shape and its flat top surface 112 lies nearly in the same plane as the concentrically arranged top surface portion 113 of the outer cap 102.
- the annular connecting portion 114 of the inner cap 103 between its skirt portion at 110 and its cylindrical top surface 112 will perfectly house and thereby seal any irregularity processed on the container neck portion to be located in the space 109, thereby avoiding any possible leakage of liquid from the container.
- the lower end of the outer skirt portion on the outer cap 102 is provided with a thicker annular inwardly protruding retaining portion 116.
- the inner cap 103 is further provided at its lower part with an annular outwardly protruding rim 117 which, in the assembled position of both caps 102 and 103 of the safety closure 1, is retained within annular portion 116.
- the outer cap 102 has a number of, preferably 6, depending, flexibly resilient lips 118, the bottom ends of which contact the conical lower part of the recessed space in the inner cap 103 at 110. The function of these lips 118 will easily be understood. They are resiliently bent somewhat inwardly by said conical wall and thus tend to keep the outer cap 102 in its highest position.
- an additional central cover disc 120 overlying the central portion 112 to give a kind of guarantee function to verify that the container has not yet been opened by unscrewing the safety closure from it.
- the cover disc 120 is connected to the outer cap 102 by means of e.g. three tearable ribs 121 integrally formed with the cap.
- the upper part of the outer wall of the recessed space of the inner cap at 110 is slightly conical in such a way as to guide and seal off the opening of the container perfectly into space 109, even if irregularities would appear as a result from the production method used.
- Fig. 3 discloses a similar safety closure as just described, however with few differences.
- the mouth of the container is somewhat wider and the central cylindrical wall portion 211, long enough to guide the outer cap when it is depressed, is integrally connected to a conical lower wall portion before it continues into the connecting annular portion 214.
- a conical ring portion 222 is integrally formed with the outer cap 202 to ensure a correct position of the uppermost central portion 212 of the inner cap 203 with respect to the outer cap 202.
- the cooperating teeth 206 and 207 respectively, the retaining ring portion 216 and the protruding rim portion 217 are accordingly shown.
- the safety closure according to the present invention is preferably molded from relatively hard somewhat elastic plastic materials, such as polypropylene, polyethylene or the like, depending on the various requirements relating to the container, the liquid and the duration of expected container use and the desired opening and closing forces to be applied by the average user of a container for household purposes.
- relatively hard somewhat elastic plastic materials such as polypropylene, polyethylene or the like, depending on the various requirements relating to the container, the liquid and the duration of expected container use and the desired opening and closing forces to be applied by the average user of a container for household purposes.
- Such materials and the wall thickness of the closure parts may easily be chosen so as to allow some deformation in case of irregularities in shape and dimensions of usual container mouths.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
Description
- This invention relates to safety closures for containers which can be readily applied and removed by one having knowledge of their operation, and which are relatively safe in the hands of children because they are usually unable to manipulate the closures in the required manner to remove them from the containers.
- Safety closures of the described type have been in use for drug containers but in view of stringent government product safety regulations are increasingly desirable for containers closures containing more or less aggressive liquids dangerous to children. In every normal household such containers or bottles frequently appear and are to be opened and closed many times more than is the case with drug containers. The latter moreover are mostly less easily reachable for children and usually are kept away more safely.
- Usually plastic bottles contain aggressive liquids, such as e.g. chlorine bleaching water. Production methods for such bottles cannot avoid the irregularities around the neck opening of these bottles, thereby creating sometimes serious difficulties because of liquid crystallization as a result of leakage. If the space between an inner and outer cap of an existing safety closure would be filled with crystals, the safety aspect of the closure would be endangered as this could unexpectedly cause an engagement between the several parts of the closure, enabling unauthorized removal thereof.
- In particular, a safety closure according to the invention is of a type as indicated in the introductory statement of the attached claim 1, which type is known as such from FR-A-2 079 409, in particular Fig. 8. This publication shows a bayonet joint between inner and outer cap, the lips and the recessed space being provided in an axial zone of the closure separate from and above the container fastening means on the inner cap, which, as usual, consisted of an internal screw-threaded part in the inner cap.
- This requires an axially long closure, requiring more material and more height, which is a disadvantage in stacking closed containers one on top of the other for transporting and storing purposes.
- From US-A-3 782 604 a safety closure of about the same type is known, which is much shorter by having short resilient lips diverging downwardly from their connection to the top terminal wall of the outer cap and resting resiliently on the top terminal wall of the inner cap. Particularly for small closures this has the disadvantage that the lips have to give a considerable resilient force while being of short length, which causes them to rupture or lose their resiliency easily. Much longer resilient lips as in said French publication are very preferable over such short lips.
- This invention aims at providing an improvement of such known safety closures, combining safety and reliability also after long periods of storing and use with a simple, inexpensive and short structure.
- To this end, a safety closure according to the introductory statement of the attached claim 1 is according to the invention characterised in that the outer wall of said recessed space extends downwardly from the top of the outer skirt of the inner cap so as to allow taking up the mouth of the container in the space radially between said outer skirt and said outer wall of said recessed space.
- As the outer skirts of the caps need a sufficient axial length for their safe engagement of the container, the application of the invention allows a reliable structure of the closure to have a length not more than the length of the container fastening means in the outer skirt of the inner cap plus the axial stroke of depression of the outer cap with respect to the inner cap for causing interengagement of the protruding parts to allow removal of the closure, plus the wall thickness of the terminal wall of the outer cap and the wall thickness of the inner cap where its outer skirt merges into said recessed part, notwithstanding the application of long resilient lips and a correspondingly deep recessed space in the inner cap cooperating therewith. The sealing between the container and the closure becomes much more reliable.
- In said French publication the outer cap is guided on the inner cap by their closely surrounding outer skirts and by the contact between the resilient lips and the wall of the recessed space. In Fig. 8 thereof the terminal wall of the inner cap is in one plane with and engaging in a central opening of the terminal wall of the outer cap.
- As the inner wall of the recessed space is conical, this central opening should be so wide as not to jam onto this conical wall when depressing the outer cap axially to allow unscrewing of the closure, so that this opening does not give much guidance of the inner cap by the outer cap in non- depressed condition of the outer cap and in the depressing movement of the outer cap. This is a disadvantage, which is removed in a preferred embodiment of the closure according to the invention by applying the features of the attached claim 2. As the recessed space according to the invention should be of the smallest possible radial extent to allow the mouth of the container to surround at least the greater part of this space, such a cylindrical central portion of the inner cap near its top end wall is also favourable for keeping this radial extent as small as possible.
- Application of the invention also allows a favourable guarantee seal to be applied, which ruptures at the first attempt to depress the outer cap with respect to the inner cap, by applying the features as given in the attached
claim 3. - Other objects and advantages will become apparent from the following detailed description, while referring to the attached drawings, in which:
- Fig. 1 is an enlarged, perspective view of a safety closure embodying the novel features of the present invention;
- Fig. 2 is a cross-sectional view taken generally along the line 11-11 of Fig. 1; the left part showing the safety closure in its norml position while no removal force or torque is applied, the right part showing the safety closure while exerting a downward pressure upon the outer cap in the direction of the arrow;
- Fig. 3 shows another embodiment of the invention in a cross-sectional view similar to the left part of Fig. 2. The inner cap and the outer cap are modified;
- Fig. 4 and Fig. 5 show partially a bottom view and a top view of the outer cap shown in Fig. 2 in its assembled position(s).
- (The scale of the various embodiments shown may differ for purposes of clarification only.)
- Turning now to Fig. 1, there is shown a safety closure 1 embodying the present invention and comprising an outer cap, indicated generally at 2, overlying an inner cap, indicated generally at 3, with the inner and outer caps being concentrically aligned.
- As shown in Figs. 2,4 and 5, to fasten the safety closure 1 to a container (not shown), a generally cylindrical skirt 104 of the
inner cap 103 is formed with a container fastening means such as ahelical screw thread 105. - To apply the safety closure 1 by screwing the
thread 105 onto the cooperatively threaded portion of a container, one or more teeth, indicated generally at 106, on the skirt portion 104 of theinner cap 103 project radially and generally coaxially outwardly for engagement with one or more teeth, indicated generally at 107, on the inner side of a depending generally cylindrically shapedskirt position 108 of theouter cap 102. Thecooperating teeth inner cap 103 is further shaped in such a manner that an upper container rim is received in thecircumferential space 109 created by the skirt portion 104 being turned back axially at 110. The centralupper portion 111 of theinner cap 103 is of cylindrical shape and itsflat top surface 112 lies nearly in the same plane as the concentrically arrangedtop surface portion 113 of theouter cap 102. The annular connectingportion 114 of theinner cap 103 between its skirt portion at 110 and itscylindrical top surface 112 will perfectly house and thereby seal any irregularity processed on the container neck portion to be located in thespace 109, thereby avoiding any possible leakage of liquid from the container. - The lower end of the outer skirt portion on the
outer cap 102 is provided with a thicker annular inwardly protrudingretaining portion 116. Theinner cap 103 is further provided at its lower part with an annular outwardly protrudingrim 117 which, in the assembled position of bothcaps annular portion 116. Furthermore theouter cap 102 has a number of, preferably 6, depending, flexiblyresilient lips 118, the bottom ends of which contact the conical lower part of the recessed space in theinner cap 103 at 110. The function of theselips 118 will easily be understood. They are resiliently bent somewhat inwardly by said conical wall and thus tend to keep theouter cap 102 in its highest position. - In the position of the safety closure 1 shown in the left part of Fig. 2, the
inner cap 103 will be sealingly engaged with the container opening, theouter cap 102 by means of theresilient lips 118 is held in its uppermost position wherein the topmost portion of both the inner and theouter caps outer cap 102, will not result in unscrewing theinner cap 103 from the container since none of theteeth - At the right in Fig. 2 it is shown that the
resilient lips 118 are pressed down only upon the exertion of a downward pressure indicated by the arrow.. Only then theteeth outer cap 102, the safety closure can be unscrewed from the container. Thelips 118 bend inwardly and thus give increasing resistance against such downward pressure, and they may even limit such downward movement when they reachbottom 114. - It is very important in view of the durability of the desired function of a safety closure of the type herein described, that there will be no permanent downward pressure to be exerted on the outer cap 2 which may perhaps cause damage to the
lips 118 to become so much overloaded that they finally collapse due to material fatigue of the plastic material thus losing its function as a safety closure entirely. By making the central portion of theinner cap 103 with theterminal wall 112 high enough and by giving it sufficient material strength, it will e.g. be possible that a number of layers of containers can be stored above a first layer, e.g. in a box, or if packed in plastic shrinking foils, each layer being placed upon a horizontal separating sheet. Even such a way of container packing does never interfere with the desired function of the safety closure because no downward pressure is permanently during storage exerted upon theouter cap 102 by the weight of any other container to the load of other articles placed thereupon. - There is only a slight clearance between the periphery of the central portion below 112 of the
inner cap 103 and the central opening in theterminal wall 113 of theouter cap 102, serving to avoid possible dirt penetrating the workable parts of the safety closure 1 and giving a good guiding of the outer cap during depression in that said central opening slides along thecylindrical portion 111 of theinner cap 103. The invented closure does not really allow for leakage of liquid because of the specially designed sealing portion on the inner cap effectively housing the container opening and if unexpectedly any liquid would become enclosed and received in the annular portion at 114, crystallization would not prevent the normal operation of the safety closure as thelips 118 will break up such crystals when being depressed. There is also shown an additionalcentral cover disc 120 overlying thecentral portion 112 to give a kind of guarantee function to verify that the container has not yet been opened by unscrewing the safety closure from it. Thecover disc 120 is connected to theouter cap 102 by means of e.g. threetearable ribs 121 integrally formed with the cap. Also the upper part of the outer wall of the recessed space of the inner cap at 110 is slightly conical in such a way as to guide and seal off the opening of the container perfectly intospace 109, even if irregularities would appear as a result from the production method used. - Fig. 3 discloses a similar safety closure as just described, however with few differences. The mouth of the container is somewhat wider and the central
cylindrical wall portion 211, long enough to guide the outer cap when it is depressed, is integrally connected to a conical lower wall portion before it continues into the connectingannular portion 214. To assist the assembling of theinner cap 203 within theouter cap 202, aconical ring portion 222 is integrally formed with theouter cap 202 to ensure a correct position of the uppermostcentral portion 212 of theinner cap 203 with respect to theouter cap 202. The cooperatingteeth retaining ring portion 216 and the protrudingrim portion 217 are accordingly shown. - In Figs. 4 and 5 the position of some parts with respect to the
outer cap 102 of Fig. 2 are additionally shown in so far as the cross-sectional view does not always sufficiently disclose their location. - The safety closure according to the present invention is preferably molded from relatively hard somewhat elastic plastic materials, such as polypropylene, polyethylene or the like, depending on the various requirements relating to the container, the liquid and the duration of expected container use and the desired opening and closing forces to be applied by the average user of a container for household purposes. Such materials and the wall thickness of the closure parts may easily be chosen so as to allow some deformation in case of irregularities in shape and dimensions of usual container mouths.
- Various features of the invention are set forth in the following claims.
Claims (3)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8102296A NL8102296A (en) | 1981-05-11 | 1981-05-11 | SCREW CAP FOR CLOSING A HOLDER. |
NL8102296 | 1981-05-11 | ||
PCT/EP1982/000100 WO1982004029A1 (en) | 1981-05-11 | 1982-05-11 | Safety closure for containers |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0078292A1 EP0078292A1 (en) | 1983-05-11 |
EP0078292B1 true EP0078292B1 (en) | 1986-10-29 |
Family
ID=19837479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82901509A Expired EP0078292B1 (en) | 1981-05-11 | 1982-05-11 | Safety closure containers |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0078292B1 (en) |
AU (1) | AU576732B2 (en) |
DE (2) | DE8234933U1 (en) |
DK (1) | DK245583D0 (en) |
GB (1) | GB2131776B (en) |
NL (1) | NL8102296A (en) |
NO (1) | NO832439L (en) |
SE (1) | SE450246B (en) |
WO (1) | WO1982004029A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8306980D0 (en) * | 1983-03-14 | 1983-04-20 | Johnsen Jorgensen Plastics Ltd | Closure |
DE3315548A1 (en) * | 1983-04-29 | 1984-12-06 | Victor Paris Wassilieff | LOCKING, IN PARTICULAR CHILD LOCKING LOCK |
DE3417184A1 (en) * | 1984-05-09 | 1985-11-14 | Technoplast B.V., Monster | SECURING LOCK |
ES296675Y (en) * | 1984-11-12 | 1988-06-01 | Spencer King Precision Engineers Ltd. | A CLOSING DEVICE FOR A CONTAINER WITH A CYLINDRICAL OPENING |
GB2210360A (en) * | 1987-10-02 | 1989-06-07 | Vere Athol Williamson | Safety caps |
AU662349B2 (en) * | 1991-07-30 | 1995-08-31 | Warner-Lambert Company | Tamper-evident cap for a container |
US5348201A (en) * | 1993-04-20 | 1994-09-20 | Kerr Group, Inc. | Flip top closure |
AUPP062897A0 (en) * | 1997-11-28 | 1998-01-08 | C.T.E.B. Equipment Pty Ltd | Tamper evident child resistant container closure |
DE102021114135A1 (en) | 2021-06-01 | 2022-12-01 | Bayerische Motoren Werke Aktiengesellschaft | Method for producing a component arrangement and component arrangement |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH519423A (en) * | 1970-02-13 | 1972-02-29 | Ciba Geigy Ag | Container closure |
US3782604A (en) * | 1972-01-20 | 1974-01-01 | M Kessler | Screw cap with safety cover |
US3817416A (en) * | 1972-08-02 | 1974-06-18 | A Costa | Safety closure cap for containers |
GB8317992D0 (en) * | 1983-07-01 | 1983-08-03 | Puresevic P J | Closure device |
-
1981
- 1981-05-11 NL NL8102296A patent/NL8102296A/en not_active Application Discontinuation
-
1982
- 1982-05-11 DE DE8234933U patent/DE8234933U1/en not_active Expired
- 1982-05-11 DE DE19823246013 patent/DE3246013T1/en not_active Ceased
- 1982-05-11 GB GB08400716A patent/GB2131776B/en not_active Expired
- 1982-05-11 WO PCT/EP1982/000100 patent/WO1982004029A1/en active IP Right Grant
- 1982-05-11 EP EP82901509A patent/EP0078292B1/en not_active Expired
- 1982-05-11 AU AU84504/82A patent/AU576732B2/en not_active Ceased
-
1983
- 1983-05-31 DK DK2455/83A patent/DK245583D0/en not_active Application Discontinuation
- 1983-06-13 SE SE8303329A patent/SE450246B/en not_active IP Right Cessation
- 1983-07-05 NO NO832439A patent/NO832439L/en unknown
Also Published As
Publication number | Publication date |
---|---|
AU8450482A (en) | 1982-12-07 |
AU576732B2 (en) | 1988-09-08 |
GB2131776A (en) | 1984-06-27 |
NO832439L (en) | 1983-12-12 |
WO1982004029A1 (en) | 1982-11-25 |
DE8234933U1 (en) | 1984-06-28 |
GB2131776B (en) | 1986-06-11 |
DE3246013T1 (en) | 1984-07-12 |
SE8303329L (en) | 1983-11-12 |
DK245583A (en) | 1983-05-31 |
DK245583D0 (en) | 1983-05-31 |
NL8102296A (en) | 1982-12-01 |
SE450246B (en) | 1987-06-15 |
GB8400716D0 (en) | 1984-02-15 |
SE8303329D0 (en) | 1983-06-13 |
EP0078292A1 (en) | 1983-05-11 |
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