CA2036320C - Improved composite cap including tamper indicating band - Google Patents
Improved composite cap including tamper indicating band Download PDFInfo
- Publication number
- CA2036320C CA2036320C CA002036320A CA2036320A CA2036320C CA 2036320 C CA2036320 C CA 2036320C CA 002036320 A CA002036320 A CA 002036320A CA 2036320 A CA2036320 A CA 2036320A CA 2036320 C CA2036320 C CA 2036320C
- Authority
- CA
- Canada
- Prior art keywords
- fingers
- band
- tamper indicating
- container
- indicating band
- 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 - Lifetime
Links
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
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
- B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
-
- 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
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
- B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
- B65D41/3423—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt
- B65D41/3428—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt the tamper element being integrally connected to the closure by means of bridges
Abstract
This relates to an improved tamper band construction for use in conjunction with closure caps for locking beneath a retaining bead on a container neck finish when the closure cap is removed to indicate rotation of the closure cap. The tamper indicating band is provided with a plurality of flaps which are initially molded in a radially inwardly, axial downwardly directed position and then are folded upwardly to radially inwardly and axially upwardly directed positions where they are engagable beneath a container retaining bead. Most particularly, the plurality of flaps are joined in groups by connecting bridges so that each group of flaps pivot as a unit will the connecting bridges stretching and providing an over center snapping action to retain the flaps in their operative positions after they are folded to such positions. By providing a plurality of individual flaps which are joined together only by the relatively narrow connecting bridges, washing of the container beneath the closure cap to remove excess product is facilitated.
Description
r.~ad~'":~~
t~ ~ ~,..a ,1..~ '.' 3 w f i IMPROVED COMPOSIT1: CAP INCLUDING
TAMPER INDICATING BAND
This invention relates in general to new and uraeful improvements in closure caps for containers, and morL particularly to closure caps having tamper .
Indicating bands.
ctost specifically, this invention relates to ,a closure cah component wtaich is provided with a tamper indici~ting band. At the lower edge of the band there lr; p>rovidud a plurality of fingers which lock beneath , the ret$inin~~ bead on . a container neck finish. The fingerts arL arranged in groups with the fingers of each grow p huin'~ interconnected by a connecting bridge.
When the fingers are initially molded, they uxtGnd radially inwardly and axially downwardly and -prior to tl~ca tamper indicating band being applied to a cont~ainur as part of a closure cap, the fingers are folded to extend radially inwardly, but axially aapbardly. 'Phe fingers are arranged in groups with fingers of each group b~:ing permanently linked together edjacdnt their tips by a connecting bridge. The bridge performs two functions. First, the connecting brldg~: increases the ability of the fingers to stay folded up in their working position. Once grouped by .
the connecting bridge, the tendency of the fingers to atsy up ira t)rviltly inc:ruased ovi:r that of a single fint~ur . Secondly, tiae bridc~us arc: small enough to nlluv water sprays r.o hav<: access to the area between tlae Lauiyur indicatin<~ baml and tlae: container neck tlralati wPaivtt Iwru~ita the re:u~oval of an excess product.
t~ ~ ~,..a ,1..~ '.' 3 w f i IMPROVED COMPOSIT1: CAP INCLUDING
TAMPER INDICATING BAND
This invention relates in general to new and uraeful improvements in closure caps for containers, and morL particularly to closure caps having tamper .
Indicating bands.
ctost specifically, this invention relates to ,a closure cah component wtaich is provided with a tamper indici~ting band. At the lower edge of the band there lr; p>rovidud a plurality of fingers which lock beneath , the ret$inin~~ bead on . a container neck finish. The fingerts arL arranged in groups with the fingers of each grow p huin'~ interconnected by a connecting bridge.
When the fingers are initially molded, they uxtGnd radially inwardly and axially downwardly and -prior to tl~ca tamper indicating band being applied to a cont~ainur as part of a closure cap, the fingers are folded to extend radially inwardly, but axially aapbardly. 'Phe fingers are arranged in groups with fingers of each group b~:ing permanently linked together edjacdnt their tips by a connecting bridge. The bridge performs two functions. First, the connecting brldg~: increases the ability of the fingers to stay folded up in their working position. Once grouped by .
the connecting bridge, the tendency of the fingers to atsy up ira t)rviltly inc:ruased ovi:r that of a single fint~ur . Secondly, tiae bridc~us arc: small enough to nlluv water sprays r.o hav<: access to the area between tlae Lauiyur indicatin<~ baml and tlae: container neck tlralati wPaivtt Iwru~ita the re:u~oval of an excess product.
With respect to the connecting bridges retaining the flaps in their operative positions, it is to be understood that as the flaps are folded from their as molded position to their operative position, the connecting bridges stretch and provide for a snap action as the flaps move over center.
Although a preferred utilization of the tamper indicating band is in connection with an overcap, it is to be understood that the tamper indicating band construction could be utilized as an integral part of a molded plastic closure cap.
In particular, the invention provides a tamper indicting band for a closure, said band being provided with a plurality of circumferentially spaced adjacent fingers extending radially inwardly and axially upwardly for engagement below a retaining bead of a container, said band being improved by said fingers being joined in groups by connecting bridges.
Moreover, the invention provides a closure for a container, said closure including a cap of the push-on twist-off type including a metal shell including an end panel and a depending skirt terminating in a curl, a sealing compound lining a radially outer part of said end panel to form a seal and said skirt to form thread means, a molded plastic overcap telescoped over said shell and having radially inwardly opening groove receiving said curl, said groove extending above said curl and forming a well for receiving excess of adhesive bonding said overcap to said skirt, and a tamper indicating band depending from said overcap and releasably connected to said overcap by rupturable bridges.
Fig. 1 is an elevational view of a closure cap as molded and shows generally the details of the connections between the fingers.
Fig. 2 is a vertical sectional view taken through the as molded over cap and applied to a metal shell of a closure cap, the view being taken generally along the line 2-2 of Fig. 1.
Fig. 3 is a view similar to Fig. 2 but shows the closure cap, including the overcap, applied to a container.
d Fig. 4 is a vertical sectional view similar to Fig. 3, but rotated circumferentially so as to illustrate the circumferential interlock of a nib on the tamper indicating band and a rib on the container neck finish.
Fig. 5 is a fragmentary horizontal sectional view taken generally along the line 5-5 of Fig. 4 and shows the specific relationship of the interlock but~ac:m thu nib and the rib. I
I'ic~~ 6 is a fragmentary vertical sectional view showing a modified form of connection between the tamper indicating band and the overcap. _ Referring now to the drawings in detail, it will be seen that there is illustrated in Figs. 1 and 2 a,n overcap formed in accordance with this invention and utilizing thu tampon indicating band which is the aub,ect of this invention. The overcap is generally ide~ntifia~d by the numeral 10 and, as is best shown in kig. 2, includes an upper.annular f).ange 12 from which an integsal skirt 14 depends. '1°he upper portion of the skirt 74 is provided with knurling 16. r 'Pho skirt 14 has integrally formed therewith a tarnp~:r indicating band 18 which is removably secured to the lower edge of the skirt 14 by a plurality of circurnferentially spaced, rupturable bridges 20. It is to be understood that the tamper indicating band 18 is otherwise separate from the skirt 14 and is spaced thereform by way of a groove 22. Each of the rupturable bridges 20 is located within an opening 24 having a lower boundary 26. Each opening 24, as well as the associated rupturable bridge 20, is defined by rutractablc blades (not shown) forming part of the mold in which the ov~rcap 10 is formed. The surfaces 26 function as push-blocks to aid in the ejection the ov~:rc~ap 1U from an associated mold. These puuli-block: 26 also help prevent distortion and bre:akagc: of thi: bridc3e area when the associated edge of thu tamf.~s:r indicating band 18 is being pushed during, ujuction of the ovc:rcap 1U from the injection mold.
At this time it is pointed out that it is kc~ow~n to provide a tamper indicating band with a de:yendinc3 f langc; which is continuous and which is falcf4<,1 u~~ for r:ngac~umc:nt beneath a retaining bead of an '~~a'..~y-~~r f ;i ;;~ S: t:a :., ,;:3 ;~,, _Q_ ast3ociatud container neck finish. It is also known to town C1» band in the form of individual flaps. j In accordance witO this invention, in order that ti~u t~ampur indicating band 18 may be locked on a contdiwr b~:n~:ath a retaining bead of a container neck finish (to be described in detail hereinafter), there is intergrally molded with the lower edge of the tamper indicating band 18 a plurality of individual flaps 28.
Each of the flaps 28 is generally of a triangular cross uQCtion and has a narrow hinged connection 30 with the j tamper indicating band while terminating in a relatively thick tip 32. The flaps 28 are distinguish~:d in that they are arranged in groups with the flapu 28 of each cJroup being joined together by connecting bridges 34. It is preferred that the flnpb 34 in each group be at least three in number.
As is best shown in Fig. 2, each flap 28 has its hingi:d connection 30 with the tamper indicating band at tha lower inside of the tamper indicating band 18.
Referring now most specifically to Fig. 2, it will bu 5cen that the overcap 10 is applied to a clo:rure cap generally identified by the numeral 40.
The closure cap 40 is of a conventional type and includes a metal shell 42. The metal shell 42 includes an end panel 44 of which a radially outer portion is in the form of a downwardly opening channel 4t~.. 'ftr~: tsirell 42 also includes a depending skirt 48 whirr is of a generally stepped configuration so that the lower Nortior~ thereof is of a greater diameter than the upper portion. The skirt 48 terminates in an outwmrdly <md upwardly conf ic3uratud curl S0. -r As best shown in fig. 3, thG end panel 44 is pruv~dzd with a central vacuum loss indicating button r -~
J a. a ::' ~aa ~~ "~-3 ? 7 td ~~J
~5-Referring once again to Fig. 2, it will be aL~n that the shell 42 is provided with a suitable scaling co~apound 54, such as plastisol, which fills the channel 46 and also lines the skirt 48. The sealing com~>ound 5d which lines the skirt 48 serves to form threads to facilitate the removal of the closure cap 40 in a wanner to be described hereinafter.
In order to provide clearance for the curl S0, the lower portion of the skirt 19 is provided on thr~ radially inner surface thereof with an annular c~roovu 56. While it is preferred that there be an inte~rfcorunce fit between the overcap 10 and the shell 42, and the steeped configuration of the skirt 48 as well as the cannection of the curl 50 with the skirt 14 facilitating this, in certain instances it may be necessary to band the overcap 10 to the shall 42 by way of an adhesive. It will be readily apparent that when the overcap 10 is forced down over the shell 42, any excess adhesive will be extruded towards the curl 50. 33y making the groove 56 of a greater height than the curl 50, there is provided a well 58 for the excess adhesive.
Referring now to Fig. 3, it will be seen that trsu closure cap 90 has been applied to a container 60 drh.ich includes an end sealing surface 62 and has external upper threads 64. Spaced below the threads 6A, the neck finish of the container 60 includes a retaining bead 66.
With thc~ flaps 28 in their upwardly folded positions, the closure cap 40 is pressed down onto to flue: ruck finish of the container 60. As a result, the dealing surface 62 will become embedded within the sealing compound 54 generally within the channel 46.
1~'urthur, the seali~ag compound which lines the skirt 48 glows es.round the threads 64 and forms in that sealing F ~,~ ~d ~ t . Ey ' f'c,l ~:' ',. .:' <~~I ~ul Y
conyound matching threads.
As the closure cap 40, together with the ovurcap 10, is pressed down onto the container 60, th.e flaps 28 will engage and ride over the retaining bead GG. Thud t3~e flaps 28 serve to lock the tamper lndicating band 18 onto the container neck finish against removal.
Referring now to Figs. 9 and 5, it will be smen that the tamper indicating band 18 is provided with circumferentially spaced, radially inwardly dir~cta~d nibs 68. The nibs 68 are disposed below the retaining bead 66 and are positioned to engage clrcumferentially behind radially autwardly projecting ' ribs 70 formed on the neck finish of the container 60 below the. retaining bead 66. This is best shown in Fig. 5~
It will b~ readily apparent from Fig. 5 that When the closure cap 40 and the overcap 10 are twisted or rotated to effect removal of the closure cap 40 from the: container 60, the tamper indicating band 18 will be prevented from rotating with the thought that the rupturable bridges 20 will rupture to indicate cap rotatian before the seal between the end finish 62 and the: sealing compound 54 is broken. In any event, the tam~~c~r indicating band 18 may be released no later than the time at which the vacuum within the container 60 is released so as to permit the eversion of the bubble 52 to indicate loss of vacuum.
It is to be understood that the groups of flaps 28 joined together by the bridges 39 are spaced a6~art as dt 72. Further, it is to be understood that aact~ nib 68 is aligned with a space 72. Tt is ;
further to bL understood that the space 72 is axagg~:rated in fig. 5 and that the space 72 need not provide e:luarwnca~ for the: ribs 7U although this has (;J ~t.: :J ?.i ",~ ~J
w been so illustrated.
In any event, the engagement of the flaps 28 under the retaining bead 66 prevents removal of the tancpur indicating band 18 with the closure cap.
Tha: linked group of flaps provides a dofinitc~ advantage. The connecting bridges 34 perform two functions. The first is increased ability of the flu's 28 to stay folded up in their working position.
Onca: groupa~d by the connecting bridges 34, the tendency of the flaps 28 to stay up is .greatly increased over i thtat of individual flaps. Further, as the flaps 28 mru folded from the their as molded position to their operative positions, the connecting bridges 34 can stretch and as the flaps 28 of each group reaches an over center position, a snap action is provided by the connecting bridyoa 34 to urc~~: tl~L flaps of the group to the.ix upstanding positions.
A second advantage of the flaps 28 being ~oiaud in groups by till. COnII~Cting bridges 34 is that the connecting bridges 34 are small enough to allow water sprays to still have access to the area between the tamper indicating band and the neck finish of the container 60. In many applications, this area can collect food products or like products squeezed down as excess from the upper finish area of the container.
The lack of water access to a drainage from this area, as is in the case of a continuous flap, could result in mold growth and undesirable conditions. Cleansing water is free to enter and drain tram between the overcap tU and the tamper indicating band 18 between tl~u f rtrcturablu bridges 20 and also between the ' ruraaining gaps between individual flap segments. ;
Drying eir flow is also enhanced. Finally, the open ccin:rtruction resulting from lightly bridging the flaps .
2!~ lrrtu yruuhez allows much les3 opportunity for i:~~ (~-ij '.o I1,J °~
1 I ' ~ ~ : I ~_.;I
."~[ v.i ':7 ~ f ,..
_g_ entrapment of a product or water.
Anoth~ar advantage of the flaps 28 being s connected into groups by the connecting bridges 34 is that the easy pivotal action of the flap groups allows .
for ll~~htLr capping pressures since dimensional fits botw~xen the tawpar band and the container need not be as tight as they would be if a solid or continuous flap. .
replaced the individual flaps. It will be readily apparent tint the tamper band 18 need not expand during application of the closure cap. The flaps 28 flex out i of the way and then lock under the corresponding retaining bead 66. The connecting bridges 34 linking the flaps 28 era sufficiently thin and the connecting bridges 34 can stretch while the flaps 28 are flexed rardially outwardly during capping since at this time the flap tips are moving slightly further apart.
Thin freedom of movement allowed by the stretching, or avc~n brdaking, of the connecting bridges 38 decreases thv structural rigidity of the flap groups, especially in longer lengths. _ The decreased rigidity of the flap groups during application of the closure cap further lowers required application pressures and distortion of the tnmpur indicating band 18 and the rupturable bridges 20. This is ben~ficial in sensitive applications such as whop the overcap is applied as an after step following the closing of the container utilizing the clc~uuru cala 40 per so or when the tamper indicating band 18 is utilized as an integral part of a one-piece plaautic continuous thread closure (not shown) where capta.ing bucoiues note difficult when the tamper iaidicntiny band resists the easy thread-on motion nuo~dud by many cappers. Extra resistance here can c~ausu the closure cap to misalign and crass thread or cause the tamper indicating band to collapse and fold :; f ~ ~~ .t~ ~3 ~ .~
f4) ~~ !:.) ~; v°,~ ~:) under the ovurcap skirt. ).ty forming the connecting bsid~3uu 34 with a thickness of .005-.012 inch, the connecting t~ridgc~s 34 are sturdy enough to withstand domolding and folding upwaxrd to hold the groups in position during capping. Stretching or breaking during capping under these conditions is not only harmless, but can even be. beneficial.
Reference is now made to Fig. 6 wherein the manner of integrally attaching the tamper indicating band 18 to the overcap skirt 16 is illustrated. In lieu of thc~ necessity of providing the mold with blades far forming the openings adjacent the bridges 20, the tamlae~r indicating band 18 can initially be directly integral with tl~e skirt 16 of the overcap 10 and there can be provided at circumferentially spaced integrals projections 72 which overlap the line of connection between the tamper indicating band 18 and the skirt 16.
'Phun, a slat 74 rnuy bc: sawed or otherwise formed separating the tamper indicating band 18 from the skirt 16 ~xcnpt tar the projections 72 which now function as rupturable bridges.
Althoygh only a preferred embodiment of the closure cap, and most particularly the tamper indicating band thereof Tiave been specifically illustrated and described herein, it is to be underrttaad that minor variations may be made in the tamper band construction and the associated overcap without departing from the spirit and scope of the invention as defined by the appended claims.
Although a preferred utilization of the tamper indicating band is in connection with an overcap, it is to be understood that the tamper indicating band construction could be utilized as an integral part of a molded plastic closure cap.
In particular, the invention provides a tamper indicting band for a closure, said band being provided with a plurality of circumferentially spaced adjacent fingers extending radially inwardly and axially upwardly for engagement below a retaining bead of a container, said band being improved by said fingers being joined in groups by connecting bridges.
Moreover, the invention provides a closure for a container, said closure including a cap of the push-on twist-off type including a metal shell including an end panel and a depending skirt terminating in a curl, a sealing compound lining a radially outer part of said end panel to form a seal and said skirt to form thread means, a molded plastic overcap telescoped over said shell and having radially inwardly opening groove receiving said curl, said groove extending above said curl and forming a well for receiving excess of adhesive bonding said overcap to said skirt, and a tamper indicating band depending from said overcap and releasably connected to said overcap by rupturable bridges.
Fig. 1 is an elevational view of a closure cap as molded and shows generally the details of the connections between the fingers.
Fig. 2 is a vertical sectional view taken through the as molded over cap and applied to a metal shell of a closure cap, the view being taken generally along the line 2-2 of Fig. 1.
Fig. 3 is a view similar to Fig. 2 but shows the closure cap, including the overcap, applied to a container.
d Fig. 4 is a vertical sectional view similar to Fig. 3, but rotated circumferentially so as to illustrate the circumferential interlock of a nib on the tamper indicating band and a rib on the container neck finish.
Fig. 5 is a fragmentary horizontal sectional view taken generally along the line 5-5 of Fig. 4 and shows the specific relationship of the interlock but~ac:m thu nib and the rib. I
I'ic~~ 6 is a fragmentary vertical sectional view showing a modified form of connection between the tamper indicating band and the overcap. _ Referring now to the drawings in detail, it will be seen that there is illustrated in Figs. 1 and 2 a,n overcap formed in accordance with this invention and utilizing thu tampon indicating band which is the aub,ect of this invention. The overcap is generally ide~ntifia~d by the numeral 10 and, as is best shown in kig. 2, includes an upper.annular f).ange 12 from which an integsal skirt 14 depends. '1°he upper portion of the skirt 74 is provided with knurling 16. r 'Pho skirt 14 has integrally formed therewith a tarnp~:r indicating band 18 which is removably secured to the lower edge of the skirt 14 by a plurality of circurnferentially spaced, rupturable bridges 20. It is to be understood that the tamper indicating band 18 is otherwise separate from the skirt 14 and is spaced thereform by way of a groove 22. Each of the rupturable bridges 20 is located within an opening 24 having a lower boundary 26. Each opening 24, as well as the associated rupturable bridge 20, is defined by rutractablc blades (not shown) forming part of the mold in which the ov~rcap 10 is formed. The surfaces 26 function as push-blocks to aid in the ejection the ov~:rc~ap 1U from an associated mold. These puuli-block: 26 also help prevent distortion and bre:akagc: of thi: bridc3e area when the associated edge of thu tamf.~s:r indicating band 18 is being pushed during, ujuction of the ovc:rcap 1U from the injection mold.
At this time it is pointed out that it is kc~ow~n to provide a tamper indicating band with a de:yendinc3 f langc; which is continuous and which is falcf4<,1 u~~ for r:ngac~umc:nt beneath a retaining bead of an '~~a'..~y-~~r f ;i ;;~ S: t:a :., ,;:3 ;~,, _Q_ ast3ociatud container neck finish. It is also known to town C1» band in the form of individual flaps. j In accordance witO this invention, in order that ti~u t~ampur indicating band 18 may be locked on a contdiwr b~:n~:ath a retaining bead of a container neck finish (to be described in detail hereinafter), there is intergrally molded with the lower edge of the tamper indicating band 18 a plurality of individual flaps 28.
Each of the flaps 28 is generally of a triangular cross uQCtion and has a narrow hinged connection 30 with the j tamper indicating band while terminating in a relatively thick tip 32. The flaps 28 are distinguish~:d in that they are arranged in groups with the flapu 28 of each cJroup being joined together by connecting bridges 34. It is preferred that the flnpb 34 in each group be at least three in number.
As is best shown in Fig. 2, each flap 28 has its hingi:d connection 30 with the tamper indicating band at tha lower inside of the tamper indicating band 18.
Referring now most specifically to Fig. 2, it will bu 5cen that the overcap 10 is applied to a clo:rure cap generally identified by the numeral 40.
The closure cap 40 is of a conventional type and includes a metal shell 42. The metal shell 42 includes an end panel 44 of which a radially outer portion is in the form of a downwardly opening channel 4t~.. 'ftr~: tsirell 42 also includes a depending skirt 48 whirr is of a generally stepped configuration so that the lower Nortior~ thereof is of a greater diameter than the upper portion. The skirt 48 terminates in an outwmrdly <md upwardly conf ic3uratud curl S0. -r As best shown in fig. 3, thG end panel 44 is pruv~dzd with a central vacuum loss indicating button r -~
J a. a ::' ~aa ~~ "~-3 ? 7 td ~~J
~5-Referring once again to Fig. 2, it will be aL~n that the shell 42 is provided with a suitable scaling co~apound 54, such as plastisol, which fills the channel 46 and also lines the skirt 48. The sealing com~>ound 5d which lines the skirt 48 serves to form threads to facilitate the removal of the closure cap 40 in a wanner to be described hereinafter.
In order to provide clearance for the curl S0, the lower portion of the skirt 19 is provided on thr~ radially inner surface thereof with an annular c~roovu 56. While it is preferred that there be an inte~rfcorunce fit between the overcap 10 and the shell 42, and the steeped configuration of the skirt 48 as well as the cannection of the curl 50 with the skirt 14 facilitating this, in certain instances it may be necessary to band the overcap 10 to the shall 42 by way of an adhesive. It will be readily apparent that when the overcap 10 is forced down over the shell 42, any excess adhesive will be extruded towards the curl 50. 33y making the groove 56 of a greater height than the curl 50, there is provided a well 58 for the excess adhesive.
Referring now to Fig. 3, it will be seen that trsu closure cap 90 has been applied to a container 60 drh.ich includes an end sealing surface 62 and has external upper threads 64. Spaced below the threads 6A, the neck finish of the container 60 includes a retaining bead 66.
With thc~ flaps 28 in their upwardly folded positions, the closure cap 40 is pressed down onto to flue: ruck finish of the container 60. As a result, the dealing surface 62 will become embedded within the sealing compound 54 generally within the channel 46.
1~'urthur, the seali~ag compound which lines the skirt 48 glows es.round the threads 64 and forms in that sealing F ~,~ ~d ~ t . Ey ' f'c,l ~:' ',. .:' <~~I ~ul Y
conyound matching threads.
As the closure cap 40, together with the ovurcap 10, is pressed down onto the container 60, th.e flaps 28 will engage and ride over the retaining bead GG. Thud t3~e flaps 28 serve to lock the tamper lndicating band 18 onto the container neck finish against removal.
Referring now to Figs. 9 and 5, it will be smen that the tamper indicating band 18 is provided with circumferentially spaced, radially inwardly dir~cta~d nibs 68. The nibs 68 are disposed below the retaining bead 66 and are positioned to engage clrcumferentially behind radially autwardly projecting ' ribs 70 formed on the neck finish of the container 60 below the. retaining bead 66. This is best shown in Fig. 5~
It will b~ readily apparent from Fig. 5 that When the closure cap 40 and the overcap 10 are twisted or rotated to effect removal of the closure cap 40 from the: container 60, the tamper indicating band 18 will be prevented from rotating with the thought that the rupturable bridges 20 will rupture to indicate cap rotatian before the seal between the end finish 62 and the: sealing compound 54 is broken. In any event, the tam~~c~r indicating band 18 may be released no later than the time at which the vacuum within the container 60 is released so as to permit the eversion of the bubble 52 to indicate loss of vacuum.
It is to be understood that the groups of flaps 28 joined together by the bridges 39 are spaced a6~art as dt 72. Further, it is to be understood that aact~ nib 68 is aligned with a space 72. Tt is ;
further to bL understood that the space 72 is axagg~:rated in fig. 5 and that the space 72 need not provide e:luarwnca~ for the: ribs 7U although this has (;J ~t.: :J ?.i ",~ ~J
w been so illustrated.
In any event, the engagement of the flaps 28 under the retaining bead 66 prevents removal of the tancpur indicating band 18 with the closure cap.
Tha: linked group of flaps provides a dofinitc~ advantage. The connecting bridges 34 perform two functions. The first is increased ability of the flu's 28 to stay folded up in their working position.
Onca: groupa~d by the connecting bridges 34, the tendency of the flaps 28 to stay up is .greatly increased over i thtat of individual flaps. Further, as the flaps 28 mru folded from the their as molded position to their operative positions, the connecting bridges 34 can stretch and as the flaps 28 of each group reaches an over center position, a snap action is provided by the connecting bridyoa 34 to urc~~: tl~L flaps of the group to the.ix upstanding positions.
A second advantage of the flaps 28 being ~oiaud in groups by till. COnII~Cting bridges 34 is that the connecting bridges 34 are small enough to allow water sprays to still have access to the area between the tamper indicating band and the neck finish of the container 60. In many applications, this area can collect food products or like products squeezed down as excess from the upper finish area of the container.
The lack of water access to a drainage from this area, as is in the case of a continuous flap, could result in mold growth and undesirable conditions. Cleansing water is free to enter and drain tram between the overcap tU and the tamper indicating band 18 between tl~u f rtrcturablu bridges 20 and also between the ' ruraaining gaps between individual flap segments. ;
Drying eir flow is also enhanced. Finally, the open ccin:rtruction resulting from lightly bridging the flaps .
2!~ lrrtu yruuhez allows much les3 opportunity for i:~~ (~-ij '.o I1,J °~
1 I ' ~ ~ : I ~_.;I
."~[ v.i ':7 ~ f ,..
_g_ entrapment of a product or water.
Anoth~ar advantage of the flaps 28 being s connected into groups by the connecting bridges 34 is that the easy pivotal action of the flap groups allows .
for ll~~htLr capping pressures since dimensional fits botw~xen the tawpar band and the container need not be as tight as they would be if a solid or continuous flap. .
replaced the individual flaps. It will be readily apparent tint the tamper band 18 need not expand during application of the closure cap. The flaps 28 flex out i of the way and then lock under the corresponding retaining bead 66. The connecting bridges 34 linking the flaps 28 era sufficiently thin and the connecting bridges 34 can stretch while the flaps 28 are flexed rardially outwardly during capping since at this time the flap tips are moving slightly further apart.
Thin freedom of movement allowed by the stretching, or avc~n brdaking, of the connecting bridges 38 decreases thv structural rigidity of the flap groups, especially in longer lengths. _ The decreased rigidity of the flap groups during application of the closure cap further lowers required application pressures and distortion of the tnmpur indicating band 18 and the rupturable bridges 20. This is ben~ficial in sensitive applications such as whop the overcap is applied as an after step following the closing of the container utilizing the clc~uuru cala 40 per so or when the tamper indicating band 18 is utilized as an integral part of a one-piece plaautic continuous thread closure (not shown) where capta.ing bucoiues note difficult when the tamper iaidicntiny band resists the easy thread-on motion nuo~dud by many cappers. Extra resistance here can c~ausu the closure cap to misalign and crass thread or cause the tamper indicating band to collapse and fold :; f ~ ~~ .t~ ~3 ~ .~
f4) ~~ !:.) ~; v°,~ ~:) under the ovurcap skirt. ).ty forming the connecting bsid~3uu 34 with a thickness of .005-.012 inch, the connecting t~ridgc~s 34 are sturdy enough to withstand domolding and folding upwaxrd to hold the groups in position during capping. Stretching or breaking during capping under these conditions is not only harmless, but can even be. beneficial.
Reference is now made to Fig. 6 wherein the manner of integrally attaching the tamper indicating band 18 to the overcap skirt 16 is illustrated. In lieu of thc~ necessity of providing the mold with blades far forming the openings adjacent the bridges 20, the tamlae~r indicating band 18 can initially be directly integral with tl~e skirt 16 of the overcap 10 and there can be provided at circumferentially spaced integrals projections 72 which overlap the line of connection between the tamper indicating band 18 and the skirt 16.
'Phun, a slat 74 rnuy bc: sawed or otherwise formed separating the tamper indicating band 18 from the skirt 16 ~xcnpt tar the projections 72 which now function as rupturable bridges.
Althoygh only a preferred embodiment of the closure cap, and most particularly the tamper indicating band thereof Tiave been specifically illustrated and described herein, it is to be underrttaad that minor variations may be made in the tamper band construction and the associated overcap without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (17)
1. A tamper indicating band for a closure, said band being provided with a plurality of circumferentially spaced adjacent fingers extending radially inwardly and axially upwardly for engagement below a retaining bead of a container, said band being improved by said fingers being joined in groups by connecting bridges.
2. A tamper indicating band according to claim 1 wherein there are at least three of said fingers in each of said groups.
3. A tamper indicating band according to claim 1 wherein said connecting bridges are stretchable to permit individual flexing of fingers in each group.
4. A tamper indicating band according to claim 1 wherein said fingers have free tips for engaging a retaining bead, and said connecting bridges are located adjacent said tips.
5. A tamper indicating band according to claim 1 wherein said groups of fingers have spaces therebetween, and said tamper indicating band has radially inwardly directed nibs radially aligned with said spaces for engaging radially directed ribs on a container to restrict rotation of said tamper indicating band relative to a container.
6. A tamper indicating band according to claim 1 wherein said band is of a molded construction and as molded said fingers extend radially inwardly and axially downwardly, and said connecting bridges form over center resilient snapping means for retaining said fingers in said radially inwardly and axially upwardly directed position once said fingers are moved to said radially inwardly and axially upwardly directed position.
7. A tamper indicating band according to claim 1 wherein said fingers have hinged connections with said band, and said fingers are spaced apart adjacent said hinged connections for facilitating washing of a filled container to remove excess product.
8. A tamper indicating band according to claim 1, wherein an upper edge of said band has rupturable bridges for connection to a closure cap member.
9. A tamper indicating band according to claim 1, wherein an upper edge of said band has rupturable bridges for connection to an overcap.
10. A closure for a container, said closure including a cap of the push-on twist-off type including a metal shell including an end panel and a depending skirt terminating in a curl, a sealing compound lining a radially outer part of said end panel to form a seal and said skirt to form thread means, a molded plastic overcap telescoped over said shell and having radially inwardly opening groove receiving said curl, said groove extending above said curl and forming a well for receiving excess of adhesive bonding said overcap to said skirt, and a tamper indicating band depending from said overcap and releasably connected to said overcap by rupturable bridges.
11. A closure according to claim 10 with said band being provided with a plurality of circumferentially spaced adjacent fingers extending radially inwardly and axially upwardly for engagement below a retaining bead of a container, said band being improved by said fingers being joined in groups by connecting bridges.
12. A closure according to claim 11 wherein there are at least three of said fingers in each of said groups.
13. A closure according to claim 11 wherein said connecting bridges are stretchable to permit individual flexing of fingers in each group.
14. A closure according to claim 11 wherein said fingers have free tips for engaging a retaining bead, and said connecting bridges are located adjacent said tips.
15. A closure according to claim 11 wherein said groups of fingers have spaces therebetween, and said tamper indicating band has radially inwardly directed nibs radially aligned with said spaces for engaging radially directed ribs on a container to restrict rotation of said tamper indicating band relative to a container.
16. A closure according to claim 11 wherein said band is of a molded construction and as molded said fingers extend radially inwardly and axially downwardly, and said connecting bridges form over center resilient snapping means for retaining said fingers in said radially inwardly and axially upwardly directed position once said fingers are moved to said radially inwardly and axially upwardly directed position.
17. A closure according to claim 11 wherein said fingers have hinged connections with said band, and said fingers are spaced apart adjacent said hinged connections for facilitating washing of a filled container to remove excess product.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/493,745 US4981230A (en) | 1990-03-15 | 1990-03-15 | Composite cap including tamper indicating band |
| US493,745 | 1990-03-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2036320A1 CA2036320A1 (en) | 1991-09-16 |
| CA2036320C true CA2036320C (en) | 2002-04-16 |
Family
ID=23961526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002036320A Expired - Lifetime CA2036320C (en) | 1990-03-15 | 1991-02-14 | Improved composite cap including tamper indicating band |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4981230A (en) |
| EP (1) | EP0447021B1 (en) |
| JP (1) | JP2915588B2 (en) |
| KR (1) | KR100188618B1 (en) |
| AT (1) | ATE110676T1 (en) |
| AU (1) | AU648537B2 (en) |
| CA (1) | CA2036320C (en) |
| DE (1) | DE69103653T2 (en) |
| ES (1) | ES2059046T3 (en) |
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| DE8700722U1 (en) * | 1987-01-18 | 1987-02-26 | Eberhardt, Heinrich, 2210 Itzehoe, De | |
| US4801030A (en) * | 1987-05-28 | 1989-01-31 | Owens-Illinois Closure Inc. | Tamper-indicating closure and package |
| JPH0786020B2 (en) * | 1987-08-05 | 1995-09-20 | 日本クラウンコルク株式会社 | Composite container lid |
| US4807771A (en) * | 1987-09-11 | 1989-02-28 | Kerr Glass Manufacturing Corporation | Tamper-evident closure |
| US4848614A (en) * | 1987-11-13 | 1989-07-18 | General Kap Corporation | Tamper-evident plastic closure |
| JPH0513735Y2 (en) * | 1987-12-31 | 1993-04-12 | ||
| US4813561A (en) * | 1988-02-29 | 1989-03-21 | Anchor Hocking Corporation | Composite retortable closure |
| US4863030A (en) * | 1988-08-01 | 1989-09-05 | Anchor Hocking Corporation | Press-on, twist-off plastisol-lined metal closure |
| US4856665A (en) * | 1988-12-15 | 1989-08-15 | Continental Plastics, Inc. | Tamper evident closure with hook-like locking tabs |
| US4875594A (en) * | 1988-12-16 | 1989-10-24 | Anchor Hocking Corporation | Closure cap |
-
1990
- 1990-03-15 US US07/493,745 patent/US4981230A/en not_active Expired - Lifetime
-
1991
- 1991-01-21 DE DE69103653T patent/DE69103653T2/en not_active Expired - Fee Related
- 1991-01-21 AT AT91300443T patent/ATE110676T1/en not_active IP Right Cessation
- 1991-01-21 ES ES91300443T patent/ES2059046T3/en not_active Expired - Lifetime
- 1991-01-21 EP EP91300443A patent/EP0447021B1/en not_active Expired - Lifetime
- 1991-02-13 KR KR1019910002548A patent/KR100188618B1/en not_active IP Right Cessation
- 1991-02-14 CA CA002036320A patent/CA2036320C/en not_active Expired - Lifetime
- 1991-02-14 AU AU71046/91A patent/AU648537B2/en not_active Ceased
- 1991-02-15 JP JP3021332A patent/JP2915588B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0447021B1 (en) | 1994-08-31 |
| CA2036320A1 (en) | 1991-09-16 |
| JPH04215964A (en) | 1992-08-06 |
| AU648537B2 (en) | 1994-04-28 |
| ATE110676T1 (en) | 1994-09-15 |
| EP0447021A3 (en) | 1991-12-27 |
| KR910016581A (en) | 1991-11-05 |
| EP0447021A2 (en) | 1991-09-18 |
| ES2059046T3 (en) | 1994-11-01 |
| DE69103653T2 (en) | 1994-12-22 |
| KR100188618B1 (en) | 1999-06-01 |
| JP2915588B2 (en) | 1999-07-05 |
| DE69103653D1 (en) | 1994-10-06 |
| AU7104691A (en) | 1991-10-10 |
| US4981230A (en) | 1991-01-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed | ||
| MKEC | Expiry (correction) |
Effective date: 20121202 |