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Publication numberUS3834579 A
Publication typeGrant
Publication dateSep 10, 1974
Filing dateMar 27, 1973
Priority dateMar 27, 1973
Also published asUS3875651
Publication numberUS 3834579 A, US 3834579A, US-A-3834579, US3834579 A, US3834579A
InventorsLa Croce L
Original AssigneeAmerican Can Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Container having a metal overcap-thermoplastic lid closure assembly
US 3834579 A
Abstract
A container is provided having a no-tool, easy-open thermoplastic lid-metal overcap closure assembly thereon. The lid and overcap are secured together to form the assembly by the engagement of overcap tongues in an upwardly-protruding annular retaining bead in the lid in one embodiment wherein the overcap is a retaining ring, and by the engagement of a radially inwardly-extending curl at the base of the overcap skirt with a lower portion of the lid skirt in another emboidment wherein the overcap has a substantially full central panel. The assembly lid and overcap skirts are spaced radially from each other to enable the lid skirt to bow outwardly as it passes over the bead on the container throat when the assembly is being placed on the container. The assembly is removably secured to the container by seating and abuttingly engaging an undercut adjacent the junction of the lid rim and skirt with the container throat bead and by crimping the lower portion of the overcap skirt against a corresponding portion of the lid skirt.
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United States Patent 1191 LaCroce Sept. 10, 1974 CONTAINER HAVING A METAL Primary Examiner-Willliam I. Price OVERCAP-THERMOPLASTIC LID Assistant Examiner-R. E. Hart CLOSURE ASSEMBLY Attorney, Agent, or Firm-Robert P. Auber; Paul R. [75] Inventor: Leonard Thomas LaCroce, Paramus, Audet Hames Mumma [73] Assignee: American Can Company, [57] ABSTRACT Greenwlch, A container is provided having a no-tool, easy-open 22 Filed; 27, 1973 thermoplastic lid-metal overcap closure assembly thereon. The lid and overcap are secured together to [21] Appl- N04 345,262 form the assembly by the engagement of overcap tongues in an upwardly-protruding annular retaining 52 us. or 220/60 R, 220/54, 220/66 head in the lid in one embodiment wherein the Over- [5 1] Int. Cl B65d 43/10 p is a retaining ring and y the engagement of a [528] Field of Search 220/42, 54, 55, 59, 60, dially inwardly-extending curl at the base of the Over- 220/ 7 215/4 cap skirt with a lower portion of the lid skirt in another emboidment wherein the overcap has a substan- 5 References Cited tially full central panel. The assembly lid and overcap UNITED STATES PATENTS skirts are spaced radially from each other to enable the lid skirt to bow outwardly as it passes over the g fi ig bead 0n the container throat when the assembly is 2202222 21262 23112335 ..3:'i:::::::: 31111226220 being Placed on the comahetassembly is remov- 3:392:873 7/1968 Old 220/42 ably Cured the Container by Seating and abuttingly 3,438,537 4/1969 Hendrickson 220/60 engaging an undercut adjacent the junction of the lid 3,441,163 4/1969 LaBarge 220 54 im and skirt ith th ntain r throat ead and y 3,556,336 1/1971 Coop 215/46 crimping the lower portion of the overcap skirt against 3,696,963 10/1972 Saunder 220/ 2 a corresponding portion of the lid skirt. 3,734,333 5/1973- Foss 220/54 15 Claims, 19 Drawing Figures CONTAINER HAVING A METAL OVERCAP-THERMOPLASTIC LID CLOSURE ASSEMBLY BACKGROUND OF THE INVENTION This invention relates to containers and container closures, and has particular reference to container closure assemblies which include a metal overcap and a reclosable thermoplastic lid.

In conventional container closure assemblies, the metal overcap usually secures the plastic lid to the container during shipment and until the container is opened by first removing the metal overcap and then the plastic lid. Thereafter, the lid alone usually provides the reclosure.

Such conventional assemblies have had shortcomings. For example, in one assembly, a cold-formed lid having an annular, essentially vertically depending skirt is placed over and around the mouth of a container. The seal between the lid and container is effected by pressure of an outward curl bead clinched radially inward at the base of the overcap skirt. This has not proven effective since once the metal overcap is removed, the cold-formed lid skirt which had taken the inwardly protruding shape of and relied on the pressure of the clinched curl bead, tends to regain its original substantially vertical profile and tends not to provide sufiicient pressure to effect a satisfactory reclosure seal, especially when the lid is subjected to high temperatures for long periods.

Another shortcoming is that such cold-formed lids tend to stress crack from curl bead pressure, especially when contacted by corrosive products such as certain paints.

It is an object of this invention to overcome the above and other shortcomings. Accordingly, an object is to provide a container having a thermoplastic lid-metal overcap closure assembly which provides an effective reclosure seal between the lid and container after the overcap is removed from the container.

Another object of this invention is to provide a container having such an assembly wherein stress cracking of the lid is eliminated.

Another object of this invention is to provide a container having such an assembly wherein the closure assembly is easily opened and closed without use of tools.

Still another object of this invention is to provide for such an assembly a thermoplastic lid that is easy to remove and replace on the container, that provides effective reclosure seals and, in one embodiment, tends to protect the metal overcap from accidentally being removed from the lid and/or container.

Another object of this invention is to provide such an assembly that is economical to manufacture and easy to initially assemble and secure to a container.

These and other objects and advantages will be apparent as'it is better understood from the description which follows, which, taken in conjunction with the drawings, discloses preferred embodiments thereof.

SUMMARY OF THE INVENTION a thermoplastic lid-metal overcap assembly in the form of l) a reclosable thermoplastic lid having: a top portion including a peripheral raised rim, a portion of which abuttingly overlies the bead, an upwardlyprotruding retaining member, a recessed central panel radially inward of the rim, and an annular sloping panel connecting the rim and the recessed central panel; a peripheral molded skirt, such skirt having an undercut molded into its interior surface adjacent the junction of the rim of the skirt, the undercut being in abutting engagement with the bead to removably secure the lid to the throat; and, (2) a removable metal overcap overlyingly engaging the lid and having a raised rim overlying the lid rim, a peripheral skirt having engaging means thereon for engaging the lid skirt, a recessed interior panel portion radially inward of the overcap rim, and a sloping connecting panel connecting the rim with the overcap skirt. The overcap skirt, except at its engaging means, is spaced from the lid skirt and effects a substantially fixed radial positional relationship between the overcap and lid and maintains the lid skirt in secured engagement with the throat bead until the overcap is removed from the lid and container. The overcap recessed interior panel portion has retainer means which engage the lid retaining member and thereby removably secure the overcap to the lid. The overcap recessed interior panel portion also has an integral pull ring appended to the overcap rim by a segment of the interior panel portion. The overcap skirt rim and recessed interior panel portion have radial cutouts therein which cooperate with the pull ring to facilitate removal of the overcap from the lid.

The recessed interior panel portion can be an annular shelf or a substantially full and substantially horizontal central panel. When it is an annular shelf, the lid retaining member is an annular retaining bead preferably having a groove in its radial outer wall, and the overcap retainer means preferably include a plurality of circumferentially spaced tongues whose terminal edge portions are in locked engagement with the lid retaining bead.

The overcap skirt engaging means include an annular radially inwardly-sloping lower skirt portion whose lower edge portion engages a lower portion of the lid skirt. The engaging means of the overcap skirt preferably also include at least three integral radially inwardlyprojecting darts. Preferably, the lid also includes grasping means which can be a peripheral substantially horizontal flange integral with and extending radially and horizontally outwardly from the lower end of the lid skirt to a point beyond the overcap skirt lower edge portion.

When the recessed interior panel portion of the metal overcap is a substantially full central panel, it has an integral pull ring at the beginning of the tear strip defined by scoring dividing the central panel and terminating in the overcap rim, a U-shaped cutout encompassing the pull ring and an adjoining portion of the tear strip adjacent the pull ring, cutouts along the scoring and in the rum tenninating the scoring, and a slit running radially from the U-shaped cutout to the rim.

This invention also is in a method of forming the aforementioned container, which comprises: separately forming the thermoplastic lid and the metal overcap, said forming of the lid and overcap including the step of providing a space between the overcap and lid skirt sufiicient to allow the lid skirt to bow outwardly when it passes over the throat bead as the lid and overcap are placed on the container,

overlying engaging the overcap and the lid so that the darts engage the outer surface of the lid skirt to thereby place the lid in a substantially fixed, centralized, spatial radial positional relationship with the overcap,

engaging the overcap tongue terminal edge portions in the lid annular retaining bead thereby removably securing the overcap to the lid and forming a thermoplastic lid-metal overcap container closure assembly,

removably securing the assembly to the throat bead by pressing the assembly over the throat and allowing the lid skirt to bow outwardly into the space between the overcaps and lid skirts as the lid skirt passes over the bead, and,

engaging the lower edge portion of the overcap skirt with a lower portion of the lid skirt to prevent the lid skirt to the secured assembly from bowing outwardly and from accidentally coming out of abutting engagement with the throat bead.

BRIEF DESCRIPTION OF THE DRAWING FIG. I is a top plan view of a thermoplastic lid-metal overcap assembly on a container.

FIG. 2 is a fragmentary side elevation of the assembly and container of FIG. 1.

FIG. 3 is a side elevation showing the metal overcap and thermoplastic lid separated from each other prior to being assembled and placed on a container.

FIG. 4 is a side elevation of the thermoplastic lidmetal overcap assembly prior to its being assembled to a container.

FIG. 5 is a reduced cross section taken substantially along line 5of FIG. 4.

F IG. 6 is an enlarged fragmentary cross section taken substantially along line 6-6 of FIG. 3 showing the overcap overlyingly engaging the lid.

FIG. 7 is an enlarged fragmentary cross section taken substantially along line 7-7 of FIG. 3 showing the position of the overcap tongues prior to the overcap and lid (dashed) components being secured together.

FIG. 8 is an enlarged fragmentary cross section taken substantially along lines 8-8 of FIG. 4, showing the overcap and lid being secured together.

FIG. 9 is an enlarged cross section showing the assembly of FIG. 8 being placed on a container throat.

FIG. 10 is an enlarged cross section showing the assembly of FIG. 9 being removably secured to a container.

FIG. 11 is an enlarged cross section showing the overcap skirt being crimped to the lid skirt to removably secure the assembly in the container.

FIG. 12 is an enlarged cross section taken through the overcap pull ring substantially along line 12-12 of FIG. 1.

FIG. 13 is an enlarged cross section taken through another embodiment of the overcap and lid of this invention prior to their being assembled.

FIG. 14 is an enlarged cross section showing the overcap and lid of FIG. 13 secured together by means of the overcap curl engaging a lower portion of the lid skirt.

FIG. 15 is an enlarged cross section showing the overcap and lid of FIG. 14 on a container, the overcap skirt being crimped to the lid skirt to removably secure the assembly to the container.

FIG. 16 is a top plan view of a modified version of this invention wherein the metal overcap has a substantially full central panel.

FIG. 17 is a side elevation of the assembly of FIG. 16.

FIG. 18 is an enlarged partial section of a modified version as would be taken of the tongue area adjacent the 3-oclock position on the overcap of FIG. 1.

FIG. 19 is a top plan view of an overcap modified as in FIG. 18 being removed from a lid and container.

DETAILED DESCRIFT ION OF THE INVENTION Referring to the drawings in detail, FIGS. 1 and 2 show a closure assembly generally designated 20 which includes a metal overcap here shown as a retaining ring, generally designated 22, secured to an underlying thermoplastic lid, generally designated 24. Assembly 20 is removably secured to a container 26. Metal overcap 22 has a raised rim 28, a peripheral skirt 30' which adjoins and depends downwardly from the rim and has a hem 32, and a recessed interior panel portion, here shown as a ledge 34, radially inward of and connected to the rim by a sloping connecting panel 36 (FIGS. 6 12). Ledge 34 has a plurality of spaced retainer means, here shown as tongues 38 which engage a lid retaining member to an annular retaining bead 40 to removably secure overcap 22 to lid 24. Ledge 34 also has a segment 42 which appends an integral pull ring 43 to overcap rim 28.

Lid 24 has a peripheral, substantially horizontal flange 46 extending radially outwardly over double seam 48 which secures an annular ring 50 to container body 52. On either side of ledge segment 42, there are opening cutouts 44 radially aligned with narrow cuts 45 in overcap rim 28 and extending outwardly into overcap skirt 30.

Overcap skirt 30 includes engaging means which include darts 31 cut in and spaced from each other around the circumference of skirt 30'. Darts .31 project radially inwardly so that their respective radially innermost edges contact an adjacent thermoplastic lid skirt in a manner to be explained.

FIG. 3 is a side elevation of the components of the container closure assembly of this invention, prior to their being secured to container 26. As shown in FIGS. 3 and 4, in the method of forming the thermoplastic lidmetal overcap container closure assembly 20 of this invention, overcap 22 and lid 24 are separately formed, and overcap 22 is brought into vertical align-merit with lid 24. When the overcap and lid are brought together (FIG. 4), overcap 22 overlyingly engages lid 24 and encompasses that portion of lid 24 radially interior of lid skirt 54.

As shown in FIG. 5, a cross section taken substantially along line 5-5 of FIG. 4 through overlyingly engaging overcap 22 and lid 24, when the overcap and lid are first brought together overcap skirt is substantially vertical and not crimped (30) as in FIG. 2. Darts 31, integral with and projecting radially inwardly from overcap skirt 30, have their innermost edges engaging the exterior wall of thermoplastic lid skirt 54. FIG. 5 shows that the engaging means, here referring to darts 31, effect and maintain substantially fixed radial positional relationship between the overcap and lid so that lid 24 is centralized within overcap 24 and there is a space provided between the exterior of lid skirt wall 54 and the interior wall of overcap skirt 30.

FIG. 6 is an enlarged cross section taken substantially along line 6-6 of FIG. 3 and shows the profile of overcap 22 (solid line) and shows that it remains substantially the same before and after it is placed on but not yet secured to lid-24 (dashed lines). Overcap skirt depends downwardly and substantially vertically from rim 28 and need not have but is shown having a radially outwardly extending hern 32. Recessed radially interior panel portion, shown as ledge 34, also need not but preferably has a hem 35. Connecting panel 36 slopes between and connects overcap rim 28 with ledge 34. FIG. 6 shows that thermoplastic lid 24 is comprised of a top portion which includes a peripheral raised lid rim generally designated 58 having a first substantially planar portion 60 between annular retaining bead 40 and annular upwardly-protruding stacking ring 62. Lid 24 also includes a peripheral molded skirt 54 which depends substantially downwardly from'rim 58 and preferably has an adjoining integral, peripheral flange 46. Lid skirt 54 has 'an undercut generally designated 64 molded into its interior surface adjacent the junction of rim 58-and skirt 54. Radially inward of retaining head 40 is an annular sloping panel 66 connecting raised rim 58 with a full, substantially planar, recessed central panel 68. FIG. 6 shows that ledge hem canrest-on lid rim 'planar portion 58 and preferable the hems radial inner edge is spatially removed fromgroove 41 so that overcap 22 can be easily placed over lid-24 without interference between ledge hem 35 and retaining head 40.

FIG. 7, a cross section of overcap 22 taken substantially along lines 7-7 of FIG. 3, shows the profile of an overcap dart and tongue. It shows that the tip of dart 31 engages the exterior wall of lid skirt 54, and that tongues 38 have a bead therein before overcap 22 and lid 24 are secured together. Bead 39 permits tongue tip T to be in a withdrawn position, radially away from the head of annular retaining bead 40, as is hem 25 in FIG. 6 so that overcap 22 can easily. be placed on lid 24.

FIG. 8, a cross section taken substantially along lines 8-8 in FIG. 4, shows that when overcap 22 and lid 24 are brought together in an overlyingly engaging relationship, head 39 is spanked or bumped and substantially flattened or removed by a suitable tool such as bumper B. This drives and engages the terminal edge portion or tongue tip T within bead groove 41 and into the thermoplastic material of annular lid retaining bead 40. Driving tongue tip T into bead 40 removably se cures overcap 22 to lid 24 to form the container closure assembly 20 of thisv invention. It is to be noted that in container closure assembly 20, there still exists the spatial relationship provided between overcap skirt 30 and the outer surface of lid skirt 54. This spatial relationship, as shown in FIG. 9, is important since it allows lid skirt 54 to bow outwardly as assembly 20 is pushed downwardly over a radially outwardly protruding annuover curl bead 70, has regained its substantially vertical profile as lid skirt 64 is seated on'and juxtaposingly and abuttingly engages curl'bead' adjacent the junction of lid rim 58 and lid skirt 54 to removably secure assembly 20 to the container. Dart 31 has likewise tended to regain its initial profile. Its outermost edge still engages the exterior wall of lid skirt 54.

As shown in FIG. 11, once container closure assembly 20 is removably secured to the container, as in FIG. 10, suitable means such as jaws J, or a roller, are used to crimp, clinch, roll or otherwise bring the lower portion of overcap skirt 30 substantially into engagement with a lower portion of lid skirt 54 so that the lower portion of overcap skirt 30 acts as part of the engaging means which efiects a substantially fixed radially positional relationship between overcap 22 and lid 24 and which prevents lid skirt 54 from bowing outwardly and lid undercut 64 from coming out of abutting engagement or securement with curl bead 70. Thus, overcap skirt 30 initially is substantially vertically downwardly depended, but when crimped (30'), angles radially inward toward lid skirt 54 when the closure assembly is finally removably secured to the container. Crimping overcap skirt inwardly 30' often causes the lower inner portion 56 of lid skirt 54 to engage throat 72 of annular ring 50 so that skirt 54 is held more securely between hem 32 and throat 50.

FIG. 12, a cross section taken substantially along line 1-212 of FIG. 1, shows that overcap 22 has an integral pull ring generally designated 43, appended to overcap rim 28 by ledge segment 42. FIG. 12 also shows that annular ring 50 can be joined to container body 52 in any suitable manner such as by a conventional double seam 73.

FIG. 13 is an enlarged fragmentary sectional view of a modified version' of a metal overcap, here designated 222, vertically aligned over thermoplastic lid 240. As shown in FIG. 13, overcap skirt 300 has darts 310 therein and is nothemmed, and lid skirt 540 does not have a flange but terminates in a downward direction.

FIG. 14 shows that when overcap 222 and lid 240 are initially assembled and brought into an overlyingly engaging relationship, the lower terminal edge .320 of overcap skirt 300 has a curl 330 which is curled substantially horizontally and radially inward under lid skirt 540 to act as an engaging means and engage the bottom edge thereof, to thereby effect a substantially fixed radial positional relationship between the overcap and lid until the container closure assembly 200 is secured to a container. Darts 310 again centralize lid 240 within overcap 222 and maintain a spatial relationship between overcap skirt 300 and lid skirt 540. As previously explained, the spatial relationship allows lid skirt 540 to bow outwardly when the initially-assembled assembly is removably secured to a container- In FIG. 15, assembly 200 is shown removably secured to throat 720 of the annular ring 500 of the container. The lower portion of overcap skirt 300' is shown crimped radially inward by jaw J so that the lower inner edge of lid skirt 540 tends to partially engage the outer surface of container throat 720. In this embodiment, the crimped lower portion of overcap skirt 300' and curl 330 are included within the overcap skirt engaging means which effects the substantially fixed radial positional relationship between the overcap and lid and prevents the lid skirt from bowing outwardly and undercut 640 from coming out of abutting engagement with curl bead 700. When the engaging means includes .curl 330, overcap 222 need not include tongues or other retaining means and lid 240 need not contain upwardly protruding retaining members such as retaining head 40. Overcap rim 280 is shown broken away but it can be hemmed or can have a connecting panel and a substantially full central panel as shown below.

FIG. 16 is a top plan view of another embodiment of the container closure assembly of this invention. More 10 particularly, FIG. 16 shows a metal overcap generally designated 222 having a top portion which includes peripheral raised rim 280, a recessed interior panel portion, here, a substantially full and substantially horizontal central panel, 340, and a substantially triangular tear strip 420 defined by score lines 802, 804 dividing the central panel, and having score cutouts 820 in the score lines which terminate in respective terminating cutouts 822 in rim 280, and 824 in the rim and extending partway into overcap skirt 300. Tear strip 420 has, 2

Cutout CO has, running from its periphery, opposite tear strip 420, a slit 826 running radially outwardly from cutout CO to and terminating in cutout 828 in raised rim 280. Thermoplastic lid 240 underlying overcap 222 has grasping means in the form of a pull tab 460 extending radially and horizontally outward from the lower end of its lid skirt.

FIG. 17, a side elevation of container closure assembly 200 of FIG. 16, shows full overcap 222 having been brought together with and being in overlying engagement with thermoplastic lid 240 (dashed lines), the

overcap having a gate 304 cut in its skirt 300 for accomodating pull tab 460 which extends radially and horizontally outwardly from lid skirt 540, as did flange 46 in the previous embodiment. Overcap 222 has darts 310 in its skirt 300 which centralize lid 240 within overcap 222 and maintain a substantially fixed spatial relationship between the lid skirt and overcap skirts. This spatial relationship allows lid skirt 540 (not shown) to bow outwardly as previously explained when assembly 220 is removably secured to a container. Full overcap skirt 300 then is crimped to obtain a profile substantially as shown in FIG. 15.

FIG. 18 is an enlarged fragmentary top plan view of another embodiment of closure assembly 20 as would be taken adjacent the tongues 38 located at about the twelve and three oclock positions on overcap 22 of FIG. 1. More particularly, FIG. 18 shows that overcap 22 can have cutouts 29 adjacent the junction of overcap rim 28 and overcap skirt 30' (or 30), and ledge 34 can have a cutout 37 adjacent one side of each tongue 38, extending into rim 28 and aligned with and cooperans vrncusus an"; nn'rifissaersnned, for

facilitating removal of overcap 22 from lid 24 and container 26, especially when the engaging means for engaging the overcap with the lid is a curl 330, as shown in FIGS. 14 and 15. When the engaging means includes a lower crimped portion of the overcap skirt such as .30'as in FIGS. 1, 2, 11 and 12, or 300'in l4 and 15, cutouts 29 are not needed since the force resulting from pulling pull ring 43 or 430 upward and tearing through the bridges between for example cutouts 44 and 4 5 FIG. 1) and severing hem 32, causes an out- .ward springing action sufficient to disengage tongue tips T from within retaining bead and to clear the tongues radially outwardly of the reatining bead head ;so that overcap 22 can be lifted upwardly and easily removed from lid 24 without interference by retaining :bead 40. When the engaging means adjacent the lower portion of crimped overcap skirt 30' or 300 'include an annular curl 330 (FIGS. 14,15) which can employed with any overcap, it has been found desirable to provide overcap 22 with cutouts 29. As shown in FIG. 19, as pull ring 43 is manipulated to sever overcap 22 to either side of the pull ring, the aforementioned pair of aligned cutouts provide bend or flex points adjacent the cutouts and divide the overcap into arcuate segments which are easily swung outwardly at the flex points to clear some of the tongue tips T from retaining bead 40 and curls 33 or 330 fromskirts 54 or 540 to thereby allow the severed overcap to be easily removed from lid 24, 240 and container 52. Similarly, when pull ring 430 is lifted, score lines 802 and 804 are conventionally gradually torn away from ring 430 toward rim 280, the bridge in skirt 330 adjacent cutout 824 is severed and overcap 22 is divided into essentially two halves which can be separated along severed score 804 and slit 826 due to bending action occuring adjacent cutout 828 in rim 280, until curl 330 clears skirt S40. Overcap 222 can thus be easily removed from lid 240 and its container (not shown).

The removal of thermoplastic lids 24, 240 is easily effected by grasping peripheral flange 46 or lift'tab 460 and exerting sufficient upward force to bow lid skirt 54, S40 outwardly and to disengage and clear undercut 64, 640 and skirt 54, 540 of curl bead 70, 700, on container throat 50, 500. Reclosure of thermoplastic lid 24, 240 is effected by downward pressure of the lid on the container throat.

That the container closure assembly of this invention provides effective initial and reclosure seals is shown in TABLE I below wherein one gallon metal paint cans containing DePont white Lucite ceiling paint and having the aluminum overcap-thermoplastic lid of FIGS. 1 12 were tested for failure. Results show that the assembly or its components did not come off, leak or otherwise fail.

TABLE I CLOSURE NO. OF TEST ASSEMBLY NO. CANS TESTS PRESSURE CON- OR COMPONENT TESTED CONDUCTED TIME (PSI) RESULTS DUCTED TIP ASSEMBLY l2 10 TIPS NO FAILURE LID ONLY I2 l0 TIPS do. DROP ASSEMBLY 6 1 DROP do. L L 6 1 DRO .r,. v. do.

TABLE I Continued CLOSURE NO. OF TEST ASSEMBLY NO. CANS TESTS PRESSURE CON- OR COMPONENT TESTED CONDUCTED TIME (PSI) RESULTS DUCTED SHAKER ASSEMBLY 6 5(Min) do. LID ONLY do. do. do. do. BLOWOUT ASSEMBLY 6 22 do. LID ONLY do. do. do. do.

' Each can was rolled off another upright can whose top surface was 8 inches from the ground.

* Cans were held in the clamp of and shaken by a Red Devil" horizontal shaker. Empty cans were submitted to air pressure. Each can was shaken once.

It has been found that container closure assemblies of this invention provide better seals than conventional metal plugs for paint cans, since during the example drop tests, when metal plugs failed, they came off the container in their entirety and the entire contents spilled therefrom, but when, under extreme test conditions, the container closure assemblies of this invention fail, there is only slight spitting or spurting of paint contents perhaps due to localized deformation of bead 70, 700 or flexing of the thermoplastic lid and localized temporary release of internal pressure.

The container closure assemblies of this inveuit ion can have any suitable configuration sufficient to obtain effective initial and reclosure seals given the configuration of the beaded throats of the particular container employed. The metal overcap is formed of sheet metal or other permanently deformable material and is preferably formed from a thin sheet of aluminum or aluminum alloy. The recessed interior panel portion of the overcap can be full, ledge or intermediary in size so long as it has retainer means thereon which cooperate with and engage a retaining member on the thermo- I plastic lid. When the retainer means are tongues 38, they can be of any suitable configuration and spaced in any suitable manner so long as they retain the overcap on the lid and can be disengaged therefrom when the overcap is removed by use of its pull ring from the lid and container. For example, when the recessed interior panel is full, the lid can have an integral boss or rivet protruding upwardly therefrom and the overcap can have an aperture therein encompassing the boss or rivet to removably secure the overcap to the lid. Cooperation of the lid retaining member and overcap retainer means should be sufficient to prevent inadvertent openings during for example shipment, but not intended openings by manipulation of the overcap pull ring. The engaging means of the overcap preferably include darts but any other suitable means for centralizing lid 24 within overcap 22 during initial assembly, for providing a spatial relationship between both the overcap and lid skirts and for maintaining the overcap and lids in a substantially fixed radial positional relationship can be employed. Likewise, the engaging means preferably comprising the crimped lower portion of lid skirt 30', 300 'can be any suitable means which restrains lid skirt 54, 540 from bowing outwardly when the assembly is on a container. Such engaging means do not permanently deform the lid skirt. Any indentation or temporary deformation of the lid skirt due to pressure of the crimped overcap skirt does not remain in the lid when the overcap is removed therefrom. It is to be noted that although the pressure from the crimped overcap skirt has restraining effect and provides an effective initial seal, the thermoplastic lid by itself is sufficient to provide an effective seal with or without overcap 22. Once the overcap is removed, the lids, on standing do not lose their original profile and will maintain their original sealing abilities. While undercut 64, 640 is shown profiled to provide an effective seal for a deep for containers of contents of lighter weight and pressure such as powder materials, or deeper for example for liquid contents heavier than paint. Retaining member 40 need not have a groove therein but can .be

with the overcap retainer means to maintain the overcap and lid assembly in removably secured engagement and to allow retainer means such as tongues 38 to be disengaged when pull ring 43 is manipulated to remove overcap 22 from lid 24. Thermoplastic lid 24 can be of any suitable thermoplastic material such as polyethylene, polypropylene polyvinyl chloride, etc. which can be suitably molded, which has suitable flexibility, and which provides effective initial and reclosure seals according to this invention.

It is thought that the invention and many of its attendant advantages will be understood from the foregoing description and it will be apparent that various changes may be made in the form, construction and arrangement of the parts of the assembly and container and that changes may be made in the steps of the method I described and their order of accomplishment without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the forms hereinbefore described being merely preferred embodiments thereof.

I claim: 1. A container comprising: a container body; a substantially rigid, upwardly extending throat joined to one end of the container body, said throat having at its uppermost enda radially outwardly protruding bead, a reclosable thermoplastic lid, said lid having a top portion including a peripheral raisedrim a portion of which abuttingly overlies said head, an upwardly-protruding retaining member, a recessed central panel radially inward of said rim, and an annular sloping panel connecting said rim and said recessed central panel, I

a peripheral molded skirt adjoining and depending downwardly from said rim, said skirt having an undercut molded into its interior surface adjacent the junction of said rim and said skirt,'said' undercut being in abutting engagement with said a removable metal overcapoverlyingly engaging said paint can having a curl bead, the undercut could be less solid so long as the member is sufiicient to cooperate said overcap rim, said recessed interior panel' portion having retainer means engaging said lid retaining member thereby removably securing said overcap to said lid, and having an integral pull ring appended to said overcap rim by a segment of said recessed interior panel portion, and

a sloping connecting panel connecting said overcap rim with said overcap skirt, said overcap having radial cutouts therein which cooperate with said pull ring when said pull ring is manipulated to remove said overcap from said lid and container.

2. The container of claim 1 wherein said retaining member of said lid top portion is an annular retaining bead, said recessed interior panel is an annular ledge, said retainer means includes a plurality of circumferentially spaced tongues formed of said ledge, and the terminal edge portions of said tongues are in removably secured engagement with said lid retaining head.

3. The container of claim 2 wherein said overcap skirt engaging means includes an annular radially inwardly-sloping lower skirt portion whose lower edge portion engages the outer wall of said lid skirt.

4. The container of claim 3 wherein said overcap skirt engaging means also includes at least three integral darts in and projecting radially-inwardly from said overcap skirt.

5. The container of claim 4 wherein said lid also comprises grasping means for facilitating removal and reclosure of said lid, said grasping means being integral with and extending radially and horizontally outwardly from the lower end of said lid skirt through a gate in said overcap skirt to a point beyond said overcap skirt lower edge portion.

6. The container of claim 5 wherein said grasping means is a peripheral flange.

7. The container of claim 5 wherein said grasping means is a lift tab.

8. The container of claim 6 wherein said overcap skirt engaging means also includes an annular hem about the lower terminal edge of said overcap skirt, said hem engaging a portion of thebottorn of said lid skirt.

9. The container of claim 8 wherein said overcap includes cutouts at the junction of said overcap rim and skirt for facilitating removal of said overcap from said lid.

10. The container of claim 9 wherein said retaining bead has an annular groove in its radial outer wall and said tongue terminal edges are engaged in said retaining head through said groove.

11. The container of claim 1 wherein said recessed interior panel portion of said metal overcap is a substantially full and substantially flat central panel, said central panel having a tear strip defined by scoring dividing said central panel and terminating in said overcap rim, an integral pull ring at the beginning of said tear strip, a U-shaped cutout encompassing said pull ring and an adjoining portion of said tear strip, cutouts both in said scoring and in said rim terminating said scoring, and, a slit running radially from said U-shaped cutout to said rim.

12. The container of claim 11 wherein said engaging means of said overcap skirt includes an annular radially inwardly-sloping lower skirt portion engaging a lower portion of the outer wall of said lid skirt, and, an annular radially inwardly projecting curl at the lower terminal edge of said lid skirt, said curl engaging a portion of the bottom of said lid skirt.

13. The container of claim 12 wherein said lid also comprises a lift tab, said lift tab being integral with and extending radially and horizontally outwardly from the lower end of said lid skirt through a gate in said overcap skirt to a point beyond said overcap skirt lower edge portion.

14. The container of claim 12 wherein said engaging means of said overcap skirt also includes at least three integral darts in and projecting radially inwardly from said overcap skirt.

15. The container of claim 14 wherein said lid also comprises a peripheral substantially horizontal flange integral with and extending radially outwardly from the lower end of said lid skirt to a point beyond said lower terminal edge of said overcap skirt.

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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4074825 *Nov 16, 1976Feb 21, 1978Gsw Limited/LimiteeEnd cap assembly for an appliance control panel
US5174464 *Jan 14, 1992Dec 29, 1992All-Pak, Inc.Paint or similar can with overcap
US5261551 *Jun 30, 1992Nov 16, 1993All-Pak, Inc.Paint or similar can with overcap having a central opening
US5711447 *Aug 9, 1996Jan 27, 1998The Coca-Cola CompanyEasy-open resealable can-end and closure therefor
US8827096 *Sep 6, 2012Sep 9, 2014Donald E. MacphersonCombination paint can and non-splash lid which eliminates the sump area at the top of the paint can and provides a mating recess on the bottom of the paint can to facilitate stacking one paint can on top of another paint can
US20110186578 *Feb 3, 2010Aug 4, 2011Tomoya KawakamiMultipurpose elastic loop gasket
US20110315566 *Jun 29, 2010Dec 29, 2011Clever Girl Concepts, LLCCustomizable storage container system
US20110315567 *Dec 29, 2011Clever Girl Concepts, LLCCustomizable Storage Container System
Classifications
U.S. Classification220/319, 220/257.2
International ClassificationB65D45/28, B65D45/00, B21D51/38, B65D45/32, B65D17/00
Cooperative ClassificationB65D45/32, B65D17/163, B21D51/383
European ClassificationB65D17/16B1, B65D45/32, B21D51/38B
Legal Events
DateCodeEventDescription
Aug 14, 1987ASAssignment
Owner name: AMERICAN CAN PACKAGING INC., AMERICAN LANE, GREENW
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AMERICAN CAN COMPANY, A NJ CORP.;REEL/FRAME:004835/0338
Effective date: 19861107
Owner name: AMERICAN NATIONAL CAN COMPANY
Free format text: MERGER;ASSIGNORS:AMERICAN CAN PACKAGING INC.;TRAFALGAR INDUSTRIES, INC. (MERGED INTO);NATIONAL CAN CORPORATION (CHANGED TO);REEL/FRAME:004835/0354
Effective date: 19870430
Owner name: AMERICAN NATIONAL CAN COMPANY,STATELESS
Free format text: MERGER;ASSIGNORS:AMERICAN CAN PACKAGING INC.;TRAFALGAR INDUSTRIES, INC. (MERGED INTO);NATIONAL CAN CORPORATION (CHANGED TO);REEL/FRAME:4835/354
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AMERICAN CAN COMPANY, A NJ CORP.;REEL/FRAME:4835/338
Owner name: AMERICAN CAN PACKAGING INC.,CONNECTICUT
Owner name: AMERICAN NATIONAL CAN COMPANY, STATELESS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AMERICAN CAN COMPANY, A NJ CORP.;REEL/FRAME:004835/0338
Owner name: AMERICAN CAN PACKAGING INC., CONNECTICUT