CA2479825C - Crimp top seal for vials - Google Patents

Abstract

A crimp top seal which can be applied to a variety of different containers. Circumferentially displaced points or lines of contact between the crimp top seal and the container at axially displaced positions provide self-alignment and secure retention of the crimp top seal on the container. The resilient crimp top seal includes a top member, angular locking ribs, and a crimp ring or lugs--all of which engage the neck finish on the container. The inner diameter of the skirt of the crimp top seal, the angle of the locking ribs, and the crimp ring or lugs provide the multiple, axially displaced lines of contact and allow the crimp top seal to engage a variety of containers.

Description

v CA 02479825 2005-10-19 ..
CRIMP TOP SEAL FOR VIALS
Fie2d of the Invention The invention relates to vials, particularly laboratory sample via3.s and dispensers for in~ectable pharmaceuticals and medicinal agents. Typically, this type of dispenser requires a securely sealed cap. The required seal is presently accomplished with a standard snap cap,~a~crimp aluminum cap, or a threaded cap and a corresponding bottle neck finish. zn the present invention, the better properties of the snap cap and the crimp aluminum Eap are adopted to provide a more safe and secure crimp top seal.
Background Many conventional conta~.ners have a standard snap cap and neck finish; most aspirin bottles utilize this type of container. In this basic snap cap design, the extended skirt of the cap secures under a protrusion on the neck of the vial such that there is one point of contact between the skirt and vial. upon, sealing the container. In addition, those designs which have more than one point of contact do not generally have tight dimensional tolerances between the cap and container contact points. This type of cap cart only be used on vials which have a snap ring far engagement with the skirt of the snap cap.

The conventional design of the snap cap does not provide for ease of assembling the cap and the vial or for ease of removing the cap from the vial. The snap cap requires the use of downward pressure to apply the cap and upward pressure to remove the cap. Such pressure typically is exerted by the thumb of the user.
Advantageously, a snap is heard or felt when the cap is positioned and the. container is sealed. No tools are required either to apply or to remove the cap.
The cap and container are typically made of plastic. This is advantageous because metal is undesirable in laboratory settings. The seal i.s consistent and provides an adequate short term (about 8 hours? seal against solvent evaporation. Because the materials used to form the cap and container are not very rigid, however, the designs cannot provide a seal able to withstand contents under high pressure or provide for long term storage without leakage--even with multiple points of contact. The protrusion on the neck of conventional vials is of increased mass; therefore, dimensional tolerance is not closely controlled during the molding process. Furthermore, the basic snap cap design does not allow for self-aligning or secure retention of the cap and the vial.
Another common closure for conCainers of this type is a crimp cap, which is securely retained on the _ 3 _ neck finish of the container by crimping a metallic (usually aluminum) skirt under a lip on the neck of the container. One advantage of the aluminum crimp cap is that it works on containers having either a standard crimp seal or a snap ring. A disadvantage is that the aluminum crimp cap requires the use of a crimping tool to form a seal. The seal is subject to the amount of squeeze and alignment given by the user. When properly applied, however, the aluminum crimp cap provides a good J.0 seal against solvent evaporation.
The crimping tool. is made of metal (typically aluminum) to provide the foxce necessary to deform the aluminum crimp cap and, thereby, either 'to apply or remove the aluminum crimp cap to or from the container.
Removal of an aluminum crimp cap from a conCainer is dangerous. If not done properly, the neck finish of the container can break--leaving ragged glass edges.
Moreover, sharp aluminum pieces are exposed as the aluminum crimp cap is literally torn away from the container.
Still another common closure for containers involves a standard screw thread neck finish on the. vial and a corresponding screw thread on the cap. Closure is attained and a seal obtained by twisting_or rotating the cap onto the vial. Thus, screw thread closures require finger torque pressure to apply and remove the cap. The seal is subject to the amount of torque applied by the ~zser. When torqued properly, the threaded cap provides a good seal equivalent to or better than the aluminum crimp.
seal. One drawback is that the threaded cap can lose torque upon relaxation of the plastic material, from which the typical threaded cap is made, which allows the cap to back off the threads. In addition, the threaded cap can only be used on threaded vials.
Finally, conventional containers allow only one type of cap per container. Suppliers must maintain large inventories, therefore, of several types of caps and several types of corresponding containers. These containers also are not conducive to simple industrial automation; the only convenient means of handling the contai~ners~is with complicated and expensive equ~.pment.
Erief Descxipt3on of the Invention In the present invention, there is provided a crimp top seal which can be applied to a variety of different. containers. Circumferentially displaced points or lines of contact between the crimp top seal and the container at axially displaced positions provide self-alignment and secure retention of the crimp top seal on the container. The resilient crimp top seal includes a top member, angular locking ribst and a crimp ring or lugs which engage the neck finish of the container. The inner diameter of the skirt of the crimp top seal, the angle of the locking ribs, and the crimp ring or lugs provide the multiple, axially displaced lines of contact and allow the crimp top seal to engage a variety of containers.
In accordance with a broad aspect, the invention provides a device comprising a container and crimp top seal combination having a vertical axis and adapted to form a securely sealed closure of the container. The combination comprises a container with an upper surface and a neck finish, the neck finish including:
(a) an upper flange, (b) a lower flange having a bottom, (c) an intermediate section disposed between the upper flange and the lower flange, (d) a shoulder disposed beneath the bottom of the lower flange, and (e) a reduced diameter section disposed concentrically with the vertical axis and between the bottom of the lower flange and the shoulder.
The combination further comprises a crimp top seal formed of a resilient material and including:
(a) a diameter, (b) a top member having an underside, (c) a dependent skirt having an inner surface adapted to surround the neck finish and to mate therewith, the skirt extending axially downward from the top member and having a lower end substantially flush laterally with the bottom of the lower flange so that the reduced diameter section of the container provides an exposed vertical section between the crimp top seal and the container when the crimp top seal and the container are combined to permit handling of the container and crimp top seal combination with automated equipment, and -5a-(d) a plurality of flexible locking ribs, each angular in shape to allow tolerance variation and having a top and a bottom, positioned on the inner surface of the skirt at a corresponding plurality of axially intermediate positions and at circumterentially spaced locations around the intermediate section of the neck finish.
The combination further comprises a first line of contact between the inner surface of the skirt of the crimp top seal and the neck finish of the container formed by the ribs engaging the intermediate section, a second line of contact between the inner surface of the skirt of the crimp top seal and the neck finish of the container disposed axially above the first line of contact and forned by the upper flange and the skirt; and a third line of contact between the inner surface of the skirt of the crimp top seal and the neck finish at the container disposed axially below the first line of contact and forned by the lower flange and the skirt, the three lines of contact adapted to align the crimp top seal and the container and to secure a sealing engagement between the underside of the top member of the crimp top seal and the upper surface of the container.
In accordance with a broad aspect, the invention provides another device comprising of a container and cap combination having a vertical axis and adapted to form a securely sealed closure of the container. The combination comprises a container with an upper surface and a neck finish, the neck finish having:
(a) a top flange including a top forming the upper surface of the container, (b) an axially displaced lower flange having a bottom, (c) a ramp having an inwardly slanted top and an outwardly slanted bottom and being disposed between the upper flange and the lower flange, (d) a shoulder disposed beneath the bottom of the lower flange, and a reduced diameter section disposed concentrically with the vertical axis and between the bottom of the lower flange and the shoulder.

-Sb-The combination further comprises a cap formed of a resilient material and including:
(a) a diameter, (b) a top member having an underside, (c) a dependent skirt having an inner surface adapted to surround the flanges and the ramp and to mate therewith.. the skirt extending axially downward to be substantially flush laterally with the bottom of the lower flange so that the reduced diameter section of the container provides an exposed vertical section between the cap and the container when the cap and the container are combined to permit handling of the container and cap combination with automated equipment, and (d) a plurality of flexible locking ribs, each angular in shape to allow tolerance variation and having a top and a bottom, positioned on the inner surface of the skirt at an axially intermediate position and at circumferentially spaced locations around the ramp of the neck finish.
The combination further comprises a first line of contact between the inner surface of the skirt of the cap and the neck finish of the container formed by the ribs engaging the ramp; a second line of contact between the inner surface of the skirt of the cap and the neck finish of the container disposed axially above the first line of contact and formed by the top flange and the skirt; and a third line of contact between the inner surface of the skirt of the cap and the neck finish of the container disposed axially below the first line of contact and formed by the lower flange and the skirt, the three lines of contact adapted to align the cap and the container and to secure a sealing engagement between the underside of the top member of the cap and the upper surface of the container.
In accordance with a further broad aspect, the invention provides another device comprising of a container having a vertical axis and adapted for combination with one of -SC-a snap cap which includes locking ribs and a crimp sealed cap which includes a crimped skin. The container comprises a neck finish with:
(a) a top flange including an outer surface with a diametric dimension and an axial dimension, each dimension having a tolerance;
(b) an axially displaced lower flange including an outer surface with a diametric dimension and an axial dimension, each dimension having a tolerance;
(c) an uninterrupted ramp having an inwardly slanted top and an outwardly slanted bottom and being disposed between the upper flange and the lower flange and defined by an axial height dimension and a lateral width dimension, each with a tolerance, the ramp of substantially V-shaped cross-section adapted to accept the locking ribs of the snap cap while allowing tolerance variation upon downward movement of the snap cap onto the container:
(d) a shoulder disposed beneath the lower flange; and (e) a reduced diameter section disposed concentrically with the vertically axis for about l/8 - 3/16 inches an axial length and between the lower flange and the shoulder, the reduced diameter section exposed upon completed downward movement of the cap onto the container to permit handling of the container with automated equipment.
The dimensional tolerance of the ramp and the flanges adapted to serve as alignment means for the snap cap, the dimensional tolerances of the diametric dimension of the outer surface of the top flange and the lower flange being + 10 thousandths of an inch. The axially displaced lower flange and reduced diameter section adapted to receive the crimped skirt of the crimp cap sealed thereby. The container thereby adapted to receive either of two alternative types of cap, a top sealed snap cap and a crimp sealed cap.

-Sd-Brief Description of the Figures FIG. 1 illustrates a container and cap combination in accordance with the present W vention;
FIG. 2 is an expanded, cross-sectional view of the upper part of the cap-container combination shown in FIG. l, taken along plane 2-2;
FIG. 3 is similar to FIG. 2 with the components dissembled;
FIG. 4 is a top view of the inside of the cap of the combination shown in FIG.
I , taken along plane 4-4 of FIG. 3;
FIG. ~ is an expanded cross-sectional view of the upper part of the container of the present invention with the alternative crimp cap for which it is adapted;
FIG. 6 is an expanded cross-sectional view of the crimp cap prior to assembly;

FIG. 7 is an expanded cross-sectional view of the cap-container combination with collar in accordance with the present invent~.on;
FIG. 8 is an e5rpanded cross-sectional view of the one piece cap with optional collar placed on the container just before assembly therewith to effect sealing of the container;
FIG. 9 is bottom viewr of the one piece cap with collar taken along the plane 9-9 of FIG. 9;

3.0 FIG. 10 is a side. view of a cap-container combination with collar iw accordance with the present invention;
FIG. 11 is an expanded view of a cap with a collax partially slid over the cap;
FIG. 12 is an expanded view of a separate collar;
FIG. 33A is a top_ view of a cap without a collar but with a pull tab;
FTG. ~.3H is a side view the cap shown in FTG.
2a 13A;

FTG. 13C is side view, in partial cross-section, of a cap-container combination with a cap pull tab in accordance with the present invention, taken along plane 13C-13C of FIG. 13A;
. FIG. 14A is a side view of a cap with a pull tab in the closed position;
FIG. 14H is a side view of a cap-container combination with a pull tab in the open position-;
FIG. 14C is a front view of a cap with a pull to tab in the open position;
FTG. 15A is a top view of a cap with both a collar and a pull tab;
FIG. 15H is side view, in partial. cross-section, of a cap-container combination wzth a cap pull tab in accordance with the present invention, taken along plane 15H-15B of FIG. 15A;
FIG. I6 illustrates a second embodiment of a container and cap combination in accordance with the present invention;

FIG. 17 is an expanded, cross-sectional view of the upper part of the cap-container combination shown in FIG. 1&, taken along plane 37-37;
FIG. 1$ is similar to FXG. 17 with the components dissembled;
FIG. 19 is a top view of the inside of the cap of the combination shown in FIG. 16, taken along plane 39-39 of FIG. 38;
FIG. 20 is an expanded cross-sectional view of the crimp top seal, in accordance with another embodiment of the present invention, before assembly;
FTG. 21 is an expanded cross-sectional view of the crimp top seal of FIG. 20 shown as applied to the upper part of the container of the present invention;
FIG. 22 is an expanded cross-sectional view of the cramp top seal of FIG. 20 shown as applied to the upper part of a standard container;
FIG. 23 is an expanded cross-sectional view of the crimp top seal of FIG. 20 with an alternative crimp ring design;

- g _ FIG. 24 is an expanded cross-sectional view of an alternative gimp top seal, in accordance with still another embodiment of the present invention, bef ore assembly;
FIG. 25 is a top view of the inside o~ the crimp top seal shown in ~rG. 24, taken along plane 25-25 of FIG. 24;
FIG. 26 is an expanded cross-sectional view of the crimp top seal of FIG. 24 shown as applied to the upper part of the container of the present invention; and FIG. 27 illustrates a container in accordance with the present invention.

Detailed Description of the Invention As shown in FIGS. 1 and 2, the present invention includes a container and cap combination 20, comprising container 10 and resilient cap 1 having an axis., a. Three Lines of contact 14, 16, and 18 exist between cap 1 and container ~.0 which provide self-al.igning and secure retention of cap 1 and container 10.
Container 10 may be plastic, glass, or other similar material.. Cap 1 is a resilient. material such as plastic.
1Q Now referring to details of this cap-container combination as better seen in FIGS. 2-4, cap 1 includes top member 9.with a center opening ~. Cap 1 has the capacity to retain within itself liner 2 which may be composed of silicone rubber, butyl rubber, natural rubber or the like. Thus, liner 2 z.s resilient and underlies top member 9. It is possible to access the contents of container is without ret~ioval of cap 1 by, for example, inserting a syringe into center opening 4 and through perforatable liner 2. Center opening 4 is sufficiently wide (on the order of 5-6 millimeters) to allow a syringe to be inserted without bending or breaking:
Historically, heavy metals such as cadmium have been used to manufacture liner 2, especially when container and cap combination 20 were designated far certain applications. The industry has moved toward stricter regulations, however, requiring proper disposal of such heavy metals. Compliance with these regulations is made easier by manufacturing linex 2 without heavy metals.
Cap skirt 5, the internal diameter of which corresponds to or is only slightly greater than the outer diameter of the neck of container 10, extends vertically (axially) downward from cap top member.9 to cap lower end 6, to be substantially flush laterally with the bottom of the lower flange l2 of container lo, and facilitates alignment of cap 1 and container 10 as they are assembled. Four angular locking ribs 3 project from skirt 5 and axe located at circumferentially spaced locations around the inside of skirt 5 along contact line 16. Lacking ribs 3 axe placed at an axially intermediate height inside ski-rt 5 to provide, in combination with contact lines 14 and 18, alignment between cap 1 and container 3Ø The angular shape of locking ribs 3 also allows for tolerance variation of liner 2, ~ 0.010 of an inch, thus accommodating thick and thin liners. Locking ribs 3, as shown in FIG. 4, retain liner 2 and provide the pull down and lack mechanism which seals container 10.
Circular ridge 26 extends from the underside of top member 9 of cap 1 and aligns with the neck of container 10. Circular ridge 26 applies a slight pressure to liner 2 urging liner 2 outwaxd, thus more securely sealing container Z0.
To facilitate alignment, as well as retention of cap 1 on container 10, the neck finish of container 10 includes upper flange 11 and lower flange 12, between which is disposed snap groove 13. When cap 3. is mounted on container 1Q and force is applied to top member 9, locking ribs 3 expand past upper flange ~.i and engage snap groove 13. Thus, snap groove 13 provides the~pull down and lock mechanism in con~unetion with locking ribs 3 which seals container 10. Ridge 26 also acts as a fulcrum, when ribs 3 are locked in snap groove 13 between upper flange, and lower f~.ange, 11 and 12, pulling downward on cap skirt 5.
There are three Lines of contact 14, 16, and 18 between skirt 5 of cap 1 and the neck finish of container 10. Locking ribs 3 engage snap groove 33 thus defining line of contact 16, formed between the apex of each rib 3 and the inner surface of groove 13, and the enlarged inner diameter of skirt 5 above and below ribs 3 contacts flanges 11 and 1.2, thus defining lines of -contact 14 and 18. (Although the top angled surface of each-rib 3 may engage under flange 11, depending on the dimensions of the various components and, specifically, of the liner 2, such engagement is viewed as a continuation of contact line 14 and not as a~discrete line of ccintact.) The three lines of contact self-align and securely retain cap 1 and container 1Q.
The snap groove 1.3 has a substantially rectangular cross-section (rectangular with some latitude allowed for tolerance variation?, formed between the top flange 11 and the lower flange 12, to accept locking ribs 3 while allowing tolerance variation upon downward movement of cap l onto container 30. Also, the snap groove 13 between flanges 13. and 12 causes the neck finish of container 3.0 to be of reduced mass as compared to conventional neck finishes for receiving a self-gripping cap. This facilitates tighter dimensional tolerance in the molding of the neck finish (yet permits mating with the self-aligning cap of the present invention and permits better gripping as~well) because thermal expansion.and contraction is controlled in the molding of the.glass or plastic article. Therefore, closer dimensional tolerance is permitted as compared to conventional containers.
More important, the multiple axially displaced alignment features of the mating cap and neck finish of the present invention provide a self alignment, which in turn results in better, i.e. more secure, cap retention, as well as more secure seating and sealing of liner 2 between the mating opposing surfaces of cap 1 and the top of the neck finish of container 10. To best accomplish this, the dimensional tolerances of the opposing surfaces of the inner diameters of skirt 5 and the outer diameters of the container neck flanges 7.1, 12 and groove l3 are all tightly controlled, preferabJ.y to plus or minus 5-10 thousandths of an inch, most preferably 3-7 thousandths of an inch.
A cap with a. crimp seal 53, as shown in FIG. 6, composed of aluminum, for example, may also be used to, seal container 10 by securing the lower end 6 0~ skirt 5, as shown in FTG. 5, under lower flange 12 of container 10. The skirt 5 of the crimp seal 53 provides two,poi.nt,s of contact, 14 and 18, between the skirt 5 and the upper flange 11 and the lower flange 12 of the container 10 in addition to the paint of contact between the Lower end 6 7.5 of the crimp cap skirt 5 and the bottom df lower flange I2 .
Thus, the container of the present invention allows the user a choice of capping, cap 1 or a crimp seal 53, thus minimizing the container inventory required.
FTGS. 7-12 show.the use of a collar 30 in conjunction with a cap 1, where FIGS. 7-9 show a one-piece cap with collar 37 and FxGS. 10-12 show the use of a separate collar 30 or the.use of the collar 30 shown in FIGS. 7-9 once detached from the cap 1.

FIG. 7 is a detailed view of the configuration of the container 10, cap 1, and collar 30 in combination.
As shown in FIG. 7, the use of the collar creates an area of continuous contact 33 around the entire circumference of the cap l, from the upper edge 31 of the collar 30 to the lower edge 32 of the collar 30. The continuous contact 33 provides radial pressure against the cap 1 and from the cap l against the container 1.0 since the inner diameter 35 of the collar 30 is slightly smaller than, but in tight tolerance with, the outer diameter of the cap 1.
In detail, the continuous contact 33 enhances the perpendicular pressure, relative to a~ci.s a, of the three points of contact, 14, 16, and 18, between the cap 1-and the container 10. The additional pressure against the points of contact increases the ability of the container-cap combination 20 to withstand high internal pressure and improves sealability for long term storage.
FIG. 7 shows the upper edge 3I of the collar 3a flush with the top member 9 of the cap l and the lower edge 32 of the collar 30 even with the bottom of the angular locking ribs 3 on the inner diameter of the cap 1. The upper edge 3l,of the collar 30 could be placed in a range of positions along the cap, from the top of the angular locking ribs 3 on the inner diameter of the cap 1 to the top member 9 of the cap Z, and the lower edge 32 of the collar 30 could be placed in a range of positions along the cap, from the bottom of the~angulax 7.ocking ribs 3 on the inner diameter of the cap 1 to the lowex end 6 of the cap 1, while still providing increased perpendicular pressure to the three contact points between the cap 1 and the container 10--although the amount of pressure could vary as a function of the choice of positions chosen for the lower and upper edge of the collar, 31 and 3~.
On the lower edge 32 of the cdllar 30 there can be a tab 36.- The tab.36 is used to allow pulling on. (for easy assembly) or pushing off (for easy removal) of either the cap 1 and collax 30 at one time or just the collar 30 by a user or automated equipment.
FRGS. 8 and 9 illustrate an exemplary farm of a one-piece cap with collar 37. FIG. 8 shows the one-piece cap with collar 37 placed on the container 10 in preparation for sealing the container 10 by snapping the cap 1 over the container 10. FIG: 9 shows an exemplary 20, method of detachably securing the collar 30 to the cap 1.
The collar 30 in FIG. 9 is attached to the cap 1 by tabs 34. 'Ihe collar 30 could also be attached to the cap 1 by a continuous membrane, or a-continuous membrane with a thin score line.

The securing means described.above allows the user or automated equipment, by placing downward axial pressure on the entire upper edge 31 of the collar 30, to: snap the cap 1 onto the container 10, separate the collar 30 from the cap Z, and slide the collar 30 into position alongside the cap 1 with only one, single, downward action. This allows the cap 1 and collar 30 to seal the container 10 with only one operation. The one-piece cap with collar 37 is formed in a single molding operation and, thus, is of the same material.
FIGS. 10-12 show an exemplary use of a separate collar 30, or a collar 30 as shown in FIGS. 7-9 once detached from the cap 1, to enhance the points of contact between the cap I and the container 14. FIG. 10 shows 7.5 the collar 3~ in place over the~cap 1 and is similar to FIG. 7, FIG. ~.l.shows a version of the cap and a separately formed collar, or a co3lar 30 as shown in FIGS. 7-9 once detached from the cap 1, where the ccimbination is preassembled. FIG. 12 shaws an exemplary, separately formed collar 30 or a collar 30 as shown in FIGS. 7-9 once detached from the cap 1.
There are additional advantages to the use of a separately formed collar in conjunction with the cap and container combination 20 described above. The separately foraned collar 30 can be formed of more rigid material than the cap 1, thereby increasing the radial pressure when the collar 30 is in position, thus further enhancing the sealability of the container 7.0 and the long-term storage potential. The separately formed collar 30 may also be a pre-selected color for container content ~.dentification purposes.
1?referably, the cap and conta~.ner combination 20, with or without a collar 30, should have a maximum vertical clearance between lower end 6 of cap 1 and shoulder 8 of container 10 of at least 1/8-3/16 of an inch to allow a point of contact 19, as seen in FTG. 2, for positioning container 10, either manually or by automated equipment (such as robotically).
Turning to FIGS. ~3A-~.SB, the cap-container combination 20 is illustrated with a pull tab 60. The 7.5 reason for providing pull tab 60 is as follows:
To provide an adequate seal between cap 7, anal container 10, especially when highly volatile solvents will be stored, a solvent-resistant material such as polypropylene must be used to form cap 1. Container lfl is formed of glass, plastic, or the like--as described above. The cap-container combination 20 is assembled by aligning cap 1 with the.top surface 7 of container 10 (see FIG. 3)' and applying downward pressure on cap Such downward pressure enables locking ribs 3 to expand past upper flange 11 and to engage snap groove 13. With locking ribs 3 engaging snap groove 13, liner 2 seals against top surface 7 of container 10. The user can accomplish such assembly of the cap-container combination 20 with relative ease using, for example, the .thumb.
Automated equipment could also be used to assemble the cap-container combination 20.
The seal formed between cap 1 and container 10 often is so good, however, that a problem arises: removal of cap 1 from container 10 is difficult. The user may be 1Q unable to push upward (using, for example, the thumb) on the cap lower end 6 with sufficient force to disengage locking ribs 3 from snap groove 13. Consequently, an external tool, such as a bottle opener., pliers, or the like, may be required to generate the force required. Of course, automated equipment would overcome. the removal problem created by the excellent seal.
To facilitate removal of cap 1 from container 10 by the user, a pull tab 60 is provided. Pull tab 60 may be molded integrally with cap 1. Tf so, the preferable molding position of pull tab 60 relative tv cap 1 is shown by the dashed lines in FIG. 13C. Thus, pull tab 60 may be of the same material as cap 1.
Full tab 60 has a central locking ring 62_ When pull tab 60 is in its closed position, as shown in 25. FIGS. 13A, 13C, and 14A, locking ring 62 fractionally fits within opening 4 in cap ~.. The friction fit between locking ring 62 and opening 4 holds pull tab 60 in place over cap-container combination 20.
Pull Cab 60 has an outer rim 64 which extends laterally beyond top member 9 of cap 1. The user can easily push upward on outer rim 64 (using, for example, the thumb? to remove locking ring 62 from opening 4.
Such action will displace pull tab 60.along the path of arrow "A" in FIG. 13C, from its closed position tshown in solid lines) to azi open position (shown in dashed lines).
Once locking ring 62 disengages opening 4, and preferably when pull tab 60 is in a completely vertical position parallel to axis a (as shown in FIGS. 14B and 14C), the user can pull upward on pull tab 60 in the ~.5 direction of arrow "H" in FIG. 148. Pull tab 60 allows the user to generate more upward force than was possible without pull tab 60. Consequently, the user can displace locking ribs 3 from snap groove, l3, thereby disengaging cap 1 from container 10, without the need fvr external tools.
For many applications, cap 1 is removed from container i0 only once; cap 3, is not required to re-seal container l0 after container 3.0 is first opened.
Especially for such applications, cap 1 may be provided with one or more tear grooves 66 defining a tear ring 68.

Tear ring 68 may be integrally formed with pull tab 60.
Once locking ring 62 disengages opening 4, and preferably when pull tab 60 is in a completely-vertical position parallel to axis a (as shown in FTGS. 14B and.l4C), the user can pull downward on pull tab 60 in the direction of arrow "C" iri FIG. 14B. The downward force on pull tab 60 breaks tear-ring 68 along tear grooves 66 (which are weaker than. the remainder of cap 1). Because cap ~. then has a gap~where tear ring 68 has been removed, cap 1, can easily be removed from container 10.
Pull tab 60 on cap 1, described above with reference to FIGS. 13A-14C for a cap=container combination 2o without a collar 30, can also be applied to a cap-container combination 20 with a collar 30--as shown in FIGS. 15A and ~.SB. Collar 30 is preferably made of a relatively rigid material, such as polypropylene, enabling collar 30 to apply circumferential pressure against the softer and more resilient material of cap 1 (which is, for example, low density. polyethylene). Pull tab 60 may be molded integrally with collar 30. Thus, pull tab 60 may be of the same material as collar 30.
Collar 30 can be removed from cap 1 by pushing upward on outer rim 64 of pull tab 60, until locking ring 62 disengages opening 4, and then pulling upward on pull tab 60 until collar 30 is removed from cap 1. Because cap 1 is typically formed of a resilient material when used with collar 30,. slight upward pressure against cap 1 will enable the user t-o remove cap 1 from container 3,0 once cellar 30 is removed from cog 1.
Collar 30 may also be provided with tear grooves 66 defining a tear ring 68, as described above.
Tear grooves 66 and tear ring 68 allow the user to break collar 30 upon exerting~downward pressure on pull tab 60.
Note that, as described above, collar 30 (with or without pull tab 60? may be preassembled with cap 1 or added later.
As stated above, one object of the present invention is. to alleviate the requirement that suppliers maintain large inventories of several types of caps and several. types of corresponding containers. One type of z5 container is illustrated, for example, in FIGS. 2 and 3.
The neck finish of that container 10 has an upper flange 11 and a lower flange 12, between which is disposed a snap groove 13. Another type of container 80 is illustrated in FIGS. L6-18. The container 80 shown in.
24 FTGS. 16-18 has a standard screw thread neck finish 90.
The threads of neck finish 90 form a clockwise helix around container 80.
An alternative embodiment to cap 1 is provided, namely cap 70 as shown in FIGS. x6-19, to sealingly 25 engage screw thread neck finish 90 of container 80 and to farm an alternative container and cap combination 100.
Because most of the elements of cap 70 and container 80 which form container and cap combination 100 are identical to the elements of cap 1 and container 10 which form container and cap combination Z0, like reference numerals have been used to designate like elements throughout the figures.
Cap 70, like cap 1, has a cap skirt 5, the internal diameter of which corresponds to or is only slightly greater than the outer diameter of the screw thread neck finish 90 of container 80. Cap skirt 5 extends vertically (axially) downward from cap top member 9 to cap lower end 6, to be substantially flush laterally with the bottom of the lowest thread 92 of container 80, and facilitates alignment of cap 70 and container 80 as they are assembled.
A number of angular locking ribs 3 project from skirt 5 and are located at circumferentially spaced locations around the inside of skirt 5. Preferably four locking ribs 3 are provided, equidistant from each other, so that they are separated by ninety degrees. Locking ribs 3 are each placed at a different axial height inside skirt 5 to provide a helix around cap 70. The circumferential and axial placement of locking ribs 3 are selected so that locking ribs 3 align with the pitch and angle of screw thread neck finish 90 of container 84 when cap 70 and container 80 are secured.
As shown in FIGS. 1.5 and 17, a small separation may exist between skirt 5 of cap 70 and the outer diameter of the screw thread neck finish 90 of container 80. Despite such separation, however, the angular shape of locking ribs 3 allows locking ribs 3 to engage the threads of screw thread neck finish 90. Preferably, no separation exists between skirt 5 of cap 70 and the outer diameter of the screw thread neck finish 90 of container 80.
Absent separation, the area of skirt 5 surrounding at least two of locking ribs 3 will define three contact points or lines facilitating alignment between cap 70 and container 80. Each of those locking ribs 3 engage the groove formed by the threads of screw thread neck finish 90 of container 80, thus defining a first line of contact formed between the apex of locking rib 3 and the inner surface of the thread groove. The inner diameter of skirt 5 above and below locking rib 3 contacts the outer diameter of adjacent threads of screw thread neck finish 90, thus defining two. additional lines of contact. The Chree lines of contact self-align and securely retain cap 70 and container 80.

Locking ribs 3 thus provide the lock mechanism which seals container 80. Circular ridge 26 extends from the underside of top member 9 of cap 70 and aligns with the neck of container 80. Circular ridge 26 applies a slight pressure to liner 2, urging liner 2 outward and, therefore, more securely sealing container 80. Locking ribs 3, as shown in FIG. 19, retain liner 2 thereby preventing liner 2 from falling out of cap 70 and eliminating the need for adhesive, welds, or the like to affix liner 2 inside cap 70_ Cap 70 and container 80 may be secured using a snap an force, a twisting action, or a combination of bath. When cap 70 is mounted on container 80 and twisted with a clockwise rotational action, locking ribs 3 parallel the action of a conventional cap thread and travel downward along the helical ramp defined by screw thread neck finish 90. Cap 70 is twisted until it fully engages container 80, as shown in FIG. 17.
Alternatively, when cap 70 is mounted on container 80 and force is applied to top member 9, locking ribs 3 expand past the threads of screw thread neck finish 90 and engage the grooves formed between the threads. Once cap 70 has been locked onto container 80, a slight clockwise rotation of cap 70 will finally and most securely seal cap 70 on container 80. A collar 30, as shown in FIGS. 7-12, may be used in conjunction with cap 70 to further improve the seal between cap 70 and Container 80.
Thus, regardless of whether a snap on force, a twisting action, or a combination of both are used, the thread grooves provide the pull down and lock mechanism in conjunction with locking jibs 3 which seals container 80. Ridge 26 also acts as a fulcrum, when ribs 3 are locked in the grooves between the threads, pulling downward on cap skirt 5.
A reverse of the snap on force, twisting action, or combination of both used to mount cap and container combination ~.Oa will remove cap 70 from container 80. Specifically, cap 70 may be twisted in a counter-clockwise direction. Locking ribs 3 will then 1.5 parallel the action of a conventional cap thread and travel upward along the helical ramp defined by screw thread neck finish 90. Cap 74 is twisted until it fully disengages container 80. Alternatively, the user may push upward (using, for example, the thumb) on cap lower end 6 with sufficient force to disengage locking ribs 3 from screw thread neck finish 90. To facilitate removal of cap 70 from container 80 by the user, a pull tab 60 may be provided (as shown in FIGS. 1-3A-15H). Pull tab 60 on cap 70 can also be applied t4 a cap-container combination~l0a with a collar 30.

Cap-container combination 100 offers a unique functional advantage when compared to the conventional combination of a threaded cap and a corresponding threaded container neck finish. The user may' inadvertently overtighten or overtorque the conventional device by rotating the cap even after the cap is fully sealed onto the container. Distortion of the liner inserted between~the cap and container may result.
Consequently, the risk of sample leakage increases. The 7.0 user may also strip the threads on the cap, the container, or both when the conventional device is overtorqued.
In contrast, cap-container combinatian 100 eliminates the possibility that the user may inadvertently overtighten or overtorque cap 70 when placing it on container 80. rf the user continues to twist cap 70 in a clockwise direction after cap 70 is fully sealed onto container 80, cap 70 will simply disengage screw thread neck finish 90 of container 80.
Specifically, at least one flexible locking rib 3 will pop out of engagement with the groove defined by the .screw thread. That action (1) informs the user that overtorquing has occurred, (2) prevents distortion of liner 2 and the consequent risk of sample ~.eakage, (3) assuxes that the threads of screw thread neck finish 90 are not stripped, and (4) maintains the integrity of locking ribs 3. The user can then remove cap 70 and reseat it onto container 80, taking care not to overtighten cap 70 again.
It is preferable to form screw thread neck finish 90 as tightly as possible, wherein the helix requires a minimum axial distance, and to locate screw thread neck finish 90 as close to the top of container 80 as possible. The formation of a tight helix will increase the line of contact between locking ribs 3 and the threads of screw thread neck finish 90.
Consequently, a better seal of cap and container combination 100 is achieved. By locating screw thread neck finish 90 close to the top of container 80, a maximum vertical clearance 94 (see FAG. 16} is achieved between lower end 6 of cap 70 and shoulder S of container 80. That clearance allows a point of contact 19, as seen in FZG. 17, for positioning container 80, either manually or by automated equipment (such as robotically).
Locking ribs 3 allow cap 70 to be molded in an inexpensive manner. Specifically, during the manufacturing process, cap 70 is simply stripped off the mold care using a stripper plate or sleeve. This avoids the need far a rotating core in which drive~gears, bearings, ratchets, and a motor are used~to unscrew the molded cap of conventional design. Because the locking rib9 3 are interrupted (and do not traverse the entire circumference of cap 70), the cap can be expanded during stripping. This allows locking ribs 3 to be formed having a clean definition, especially for cap-container combinations 3.04 with small diameters.
The multiple, circumferentially and axially displaced alignment features of the cap and container combination 100 of the present invention provide a self alignment, which in turn results in better, i.e. more secure, cap retention, as well as more secure seating and sealing of liner 2 between the mating opposing surfaces of cap 70 axed the neck finish of container 80. To best accomplish this, the dimensional tolerances of the opposing surfaces of the inner diameters of skirt 5 and the outer diameters of the screw thread neck finish 90 are all tightly controlled, preferably to plus or minus 5-~0 thousandths of an inch, most preferably 3-7 thousandths o~ an inch.
Cap and container combination 100 provides a secure closuxe which resists sample evaporation losses.
The snap on feature of cap 70 avoids the tedious assembly process, of twisting a threaded cap onto a threaded vial such as container 80, yet provides the tight seal achieved by threaded caps. Those users who are most comfortable w~,th threaded closures, however, can twist cap 70 onto container 80--regardless of whether they use the snap on feature of cap 70. Cap 70 can be removed easily from container 80 to add or remove sample.

The advantageous properties of the resilient snap cap ~. (shown in FIGS. 1 and 2) and the aluminum crimp seal 53 (shown in FIGS. 5 and 6} can be combined in a crimp top seal 200. A first embodiment of crimp top seal. 200 of the present invention is illustrated in FIG.
20: A resilient material such as plastic is suitable for manufacturing crimped top seal 200.
Crimp tap seal 200 includes top member 9 with a center opening 4 and a circular ridge 26. A skirt 5 extends vertically (axially) downward from top member 9 to the lower end 6 of crimp top seal 200. Four angular locking ribs 3 project from skirt 5 and are located at circum~erentially spaced locations around the inside of skirt 5. The angular~shape of locking ribs 3 (formed at an angle, a, of about 120°) allows fox tolerance.
variation of liner 2. Locking ribs 3 retain.liner 2 and provide the pull down and lock mechanism which seals the container to which crimp top seal 200 is secured. In addition, locking ribs.3 provide a tactile "feel" and an audible "click" indicating that crimp top seal 200 i9 secured to the container.
At lower end 6, crimp top seal 200 has a crimp ring 202. Crimp ring 202 extends radially away from skirt 5 and provides the additional material necessary to permit crimp top seal Z00 to be crimp around~the flange or shoulder,of the container to which crimp top seal 200 is secured (see FIG. 21). Crimp ring 202 may extend perpendicularly away from skirt 5, forming a rectangular shape, as shown in FIG.-20. Alternatively, crimp ring 202 may be provided with a radius, R, as shown in FIG.
23. The radius is advantageous because it relieves stress points which otherwise tend to form in crimp top seal 20.0 during the crimping and removal operations.
Unlike snap cap 1, which is preferably made of low density polyethylene, crimp top seal 200 is preferably made of polypropylene. Polypropylene allows crimp top seal 200 to form and hold its crimped seal better than the less rigid polyethylene material. Also unlike snap cap 1, which has a skirt 5 having (except for ribs 3? a substantially constant internal diameter, skirt 5 of crimp top seal 200 may be provided with a variable internal diameter. Specifically, the internal diameter of skirt 5 above ribs 3 is less than that of skirt 5 below ribs 3. This diametric variation enables crimp top seal 200 to better follow the shape of the flange or shoulder of the container to whi-ch it is affixed during the crimping operation.
As shown in FIGS. 21 and 22; crimp top seal 200 allows the user to maintain in inventory a single crimp top seal 200 suitable fox at least twa separate containers. Consequently, the required cap inventory is minimized. One type of container is illustrated, for example, in FIGS. 2, 3, and 21. The neck finish of that container 10 has an upper flange 11 and a lower flange 12, between which is disposed a snap groove 13. Another type of container 250 is illustrated in FIG. 22. The container 250 shown in FIG_ 22 has a standard neck finish 252. Neck finish 252 has an upper flange 11 and a lower flange 12, between which is disposed a straight (vertical? side wall devoid of either threads or a snap groove_ Turning. first to FIG. 21, the present invention includes a container and crimp top seal combination 300, comprising container 10 and resilient crimp top seal 200 having an axis, a. Four lines of contact 14; 16, 18, and 22 exist between crimp top seal 200 and container 10 which provide self-aligning and secure retention of crimp top seal 200 and container 10. Crimp top seal 200 is used to seal container 10 by securing crimp ring 202 of skirt 5, as shown in FIG. 21, under 3ower'flange 12 of container 10.
Skirt 5 of crimp top seal 200 provides two lines of contact, 14 and 18, between skirt 5 and upper flange 11 and lower flange z2 of container 10. Tn addition, there is a line of contact 16 between ribs 3 of skirt 5 and snap groove 13 of container 10. Finally, lower end 6 of skirt 5 forms a line of contact 22 with the bottom of lower flange 12. For some applications, three lines of contact (14, 16, and 18) provide a sufficient seal and crimp top seal 200_need not be crimped to dorm fourth line of contact 22.
When crimp top seal 200 is mounted on container 10 and force is applied to top member 9, locking ribs 3 expand past upper flange 11 and engage snap groove 13.
Thus, snap groove 13 provides the pull down and lock mechanism an conjunction with locking ribs 3 which seals container Z0. Ridge 26 also acts as a fulcrum, when ribs 3 are locked in snap groove 13 between upper flange 11 and lower flange 12, pulling downward on skirt 5.
Turning now to FIG. 22, the present invention includes a container and crimp top seal combination 260, comprising standard container 250 and resilient crimp top seal 200 having an axis, a. Four lines o:~ contact 14, 16, 18, and 22 exist between crimp top seal 200 and container 250 which provide self-aligning and secure retention of crimp top seal. 200 and container 250. Crimp top seal 200 is used to seal Container 250 by securing crimp ring 202 of skirt 5, as shown in FIG. 22, under lower flange 12 of container 250.
Skirt 5 of crimp top seal 200 provides two lines of contact, 14 and 18, between skirt 5 and upper flange 11 and lower flange 12 of container 250. In addition, there is a line of contact 16 between ribs 3 of skirt 5 and the vertical wall of container 250 disposed between flanges ~1 and 12. Finally, lower end 6 of skirt forms a line of contact 22 with the bottom of lower flange 12.
5 When crimp top seal 200 is mounted on container 250-and force is applied to top member 9, locking ribs 3 expand past v.pper flange 11, and engage the vertical wall of container 250 disposed between flanges 17. and 12. The angle, a, of about 120° and the inside diameter of crimp top seal 200 are predetermined to assure that ribs 3 "snap" into position approximately in the middle of the vertical wall. Thus, the user receives a tactile "feel"
assuring that crimp~top seal 200 is correctly aligned and in position before the crimping operation.
Tha angle of ribs 3 and the inside diametex of skirt 5 of crimp top seal 200 are both cxitical, in combination, to permit crimp top seal 200 to seal a variety of container types (e.g., both container.7.0 and container 250). Tn comparison to snap cap 1 (see FIGS. 2 and 3}, ribs 3 of crimp top seal 200 have a more gradual angle--ribs 3 of snap cap 1 have an angle of about 90°--and the inside diameter of skirt 5 of crimp top seal 200 is less than that of snap cap 1. A crimp top seal 200 having t-he dimensions of snap cap 1 would not seal container 250. The sharper angle of ribs 3 and the greater inside diameter of skirt 5 of snap cap 1 prevent such a crimp top seal 200--at least absent extreme force--from seating on the middle.of the vertical wall of container Z50. Instead, after the user removes the downward force, ribs 3 push sk-lrt 5 upward. Lower end 6 of skirt S then is no longer adjacent the bottom of lower flange 12 of container 250 and the crimping operation cannot be .performed.
Two, separate tools are used to apply and to~
remove aluminum crimp seal 53 (FIGS. 5 and ~) from a container. Hoth tools are made of metal to provide the force required to apply and remove the relatively rigid aluminum crimp seal 53. During the removal process, the tool literally tears aluminum crimp seal 53 away fram the container--creating jagged aluminum edges which pose a danger to the user and equip~ient. Sharp pieces of aluminum often-stick to the jaws of the tool and must be removed. Occasionally, the neck finish on the container breaks--Leaving ragged edges which are especially dangerous when the container is glass.
Unlike metal crzmp seal 53., it is possible to apply and remove crimp top seal 200 without any tools.
If desired, the t6ols used to apply and remove crimp top seal 200 can be made of relatively inexpensive plast~.c, rather than metal, because less force is required to apply and remove the.plastic crimp top seal 2Q0 than the metal crimp seal 53. During the removal process, the tool pries flexible crimp top seal 200 away from the container without tearing. Avoided are the dangerousr ragged edges of metal crimp seal 53; a broken container neck finish, or both. Even if plastic crimp top seal 200 were to tear during removal, the ragged plastic edges would pose less risk of injury than their metal counterparts.
An alternative embodiment of the crimp top seal is illustrated in FTGS. 24 and Z5. FIG. 24 is an expanded cross-sectional view of alternative crimp top seal 400 before assembly. FIG. 25 is a top view of the inside of crimp top seal 400 shown in FzG. Z4, taken along plane 25-25 of FIG. 24.
Alternative crimp top seal 400 includes top 15. member 9 with a center opening 4 and a circular ridge 26.
skirt 5 extends vertically (axiallyy downward from top member 9 to the lower end 6 of alternative crimp top seal 400. Four angular locking ribs 3 project from skirt 5 and are located at circumferentially spaced locations around the inside of skirt, 5. The angular shape of locking ribs 3 is very important to assure a tight seal with container 10. As shown in FIG. 24, locking ribs 3 form an: angle, Q, of about l2° from vertical. The angular shape of locking ribs 3 also allows for tolerance variation of liner 2 (as discussed more fully below).
Locking ribs 3 retain liner 2 and provide the pull down and lock mechanism which. seals the container to which alternative cr-imp top seal 400 is secured.
Clearly, alternative crimp top seal 400 differs from crimp top seal 200 with respect to the angle of locking ribs 3. Alternative crimp top seal 400 also differs from crimp top seal 200 at lower end 6. Although crimp top seal 200 has a crimp ring 202, alternative crirnp'top seal 400 has a number of lugs 33.0 positioned at lower end 6 and extending radially inward from skirt 5.
Preferably, lugs 310 are equally spaced around the circumference of alternative crimp top seal 400. As shown in FZG. 25, eight lugs 310 spaced at 45° intervals with a depth of about O.aoa inches are suitable. Lugs 31.0 provide the additional material necessary to permit 7.5 alternative crimp top seal 400 to be crimped around the flange or shoulder of the container to which alternative crimp top seal 400 is secured (see FIG. 26).
Like crimp top seal. 200, alternative crimp top seal 400 is preferably made of polypropylene. Alsv like crimp top~seal 200, skirt 5 of alternative crimp top seal 400 may be provided with a variable internal diameter.
Specifically, for t-he exemplary alternative crimp top seal 400 illustrated in FIG. 24, the internal diameter, B, of skirt 5 above ribs 3 is about 0.425 inches. (The internal diameter, A, of ribs 3 is about 0.409 inches.) The internal diameter, D, of skirt 5 below ribs 3 is about 0.446 inches--somewhat greater than that of skirt 5 above r~.bs 3. This diametric variation enables alternative crimp top seal 400 to better follow the shape of the flange or shoulder of the container to which it is affixed during the crimping operation. The internal diameter, C, of lugs 310 is~about 0.430 inches. Finally, the external diameter, E, of skirt 5 at lower end 6 is about. 0.485 inches.
Alternative crimp top seal 400 allows the user to maintain in inventory a single alternative crimp top seal 400 suitable for a variety of separate containers.
Consequently, the required cap inventory is minimized.
Alternative crimp top seal 400 3s especially adapted, however, for use with the unique container 350 n5 illustrated in FIGS. 26 and 27. The neck finish of container 350 has an upper flange 11 and a lower flange 22, between which is disposed a shallow ramp 340. Ramp 340 has an inwardly slanted top 342 and an outwardly slanted bottom 344 which mate with the correspondingly 2o ang~.ed sides of ribs 3 of alternative crimp top seal 400 to seal. alternative crimp top seal and container combination 360.
Turning to FIG. 26, the present invention includes a3ternative crimp tnp seal and container 25 combination 360 comprising container 350 and alternative crimp top seal 400 having an axis, a. Four lines of contact 14, 16, Z8, and 22 exist between alternative crimp top seal 400 and container 350 which provide self-aligning and secure retention of alternative crimp top seal 400 and container 350. Altex~ative crimp tap seal 400 is used to seal container 350 by securing lugs 310 of skirt 5, as~shown in FIG. 26, under lower flange 12 of container 350.
Skirt 5 of alternative crimp top seal 400 provides two lines of contact, 14 and x8, between skirt 5 and upper flange 11 and lower flange l2 of container 350.
Tn addition, there is a line of contact 16 between ribs 3 of skirt 5 and ramp 340 of container 350. Finally, lower end 6 of skirt 5 forms a line of contact 22 with the bottom of lower flange 12. For some applications, three lines of contact (14, 16, and 18) provide a~suffiCient seal and alternative crimp top seal 400 need not be crimped to form fourth line of contact 22. Fox other applications, three different fines of contact (14,_26, and 22) provide a sufficient seal and ribs 3 need not seat in perfect alignment with ramp 340.
When alternative crimp top seal 400 is mounted on container 350 and force is applied to top member 9, locking ribs 3 expand past upper flange ll and engage ramp 340_ Thus, ramp 340 provides the pull down and lock mechanism in conjunction with locking ribs 3 which seals container.350. Ridge.26 also acts as a fulcrum, when _ 40 _ ribs 3 are locked in ramp 390 between upper flange 11 and lower flange ~,2, pulling downward on sk~.rt 5.
The "head" pressure, or downward force that the user must apply to top member 9 to mount alternative crimp top seal 400 on container 350 is advantageously small. Tests were done comparing the head pressure for a number of different cap (or crimp top seal) and container combinations. Specifically, four tests were repeated for the following caps. and crimp top seal, each in ~0 combination with a container 10 having an outer diameter of about 0.425 inches: (1) a low density polyethylene cap l, (2) a polypropylene cap 1, and (3) a polypropylene alternative crimp rop seal 40D. Tests were also run for the combinations o~ (4) a polypropylene alternative crimp top seal 400 and a container 250 having an outer diameter of about 0.425 inches, and (5) a polypropylene alternative crimp top seal 400 and a container 350 also having an outer diameter of about 0.425 inches. The rest results~are summarized below.
2 0 CONTAINER 10 CONTAINER 2 COivITAINER

LDPE CAP P CAP SEAL SEAL, SEAL

5.5 14.0 4.S 5.0 4.0 6 . 2 5 J.4 . 5 5 . 0 5 . 5 4 . 5 5.75 36.5 5.0 5.0 4.75 6.25 14.5 5.0 5.5 a.0 (All forces in pounds.?

The angle of ribs 3 and the inside diameter of skirt 5 of alternative crimp top seal 400 are both critical,, in combination,. to permit alternative crimp .top seal 900 to seal a variety of container types (e. g., container 7.0, container 250, and container 350?. In comparison to crimp top seal 200, ribs 3 of alternative crimp top seal 400 have a more gradual angle. In addition; alternative crimp top seal 900 replaces crimp ring 202 of crimp top seal 200 with lugs 31,0 at lower end Z0. 6. This replacement provides an advantage.
The crimping tool used to apply and remove a crimp seal, such as either crimp top seal 200 or alternative crimp top seal 900, has atypically) four jaws that compress or release the crimp seal when the user 7.5 squeezes or releases the handles- o-f the crimping tool.
Some crimping tools leave a space or gap between the jaws even in the fu~ly closed position. Such gaps tend to °cateh°' crimp ring 202 of crimp top seal 200 upon application of crimp top sea3 200 to a container using 20 the crimping tool. Consequently, when the jaws of the crimping tool are released, the crimping tool remains caught on crimp top seal 200 and will not release crimp top seal 20o as desired. ''his problem does not occur for lugs 310 of alternative crimp top seal 400 because the 25 crimping tool rolls lugs 310 under the shoulder of the container. In contrast, the crimping tool must bend crimp ring 202 under the shoulder of the container.

Alternative crimp top seal and container combination 360 is extremely versatile. A single crimp top seal 400 of specified dimensions may be applied to a variety of containers 350 having different dimensions.
S Specifically, crimp. top seal 400 having the dimensions illustrated in FTG. 24 will seal containers 350 having outer diameters at flanges 11 and 12 of 0.420, 0.425, and 0.430 inches. Thus, only one alternata.ve crimp top seal 404 need be maintained in inventory for use with a number of containers. The versatility of alternative crimp top seal and container combination 360 is important, too, because it can account for manufacturing tolerances. A
container 350 designed to have an outer diameter at flanges 11 and 12 of 0.425 ~ 0.005 inches, for example, Z5 may yield an actual container having an outer diameter at flanges 11 and 12 of between 0.420 and 0.430 inches.
The matching angles between ribs 3 of alternative crimp top seal 400 and ramp 340 of, container 35U provide both an enhanced seal and increased flexibility. Typically, a number of caps must be provided to accommodate liners 2 of varying thickness.
Liners 2 typically vary between 0.010 and 0.040 inches in thickness. Unless a cap 1 having the proper dimensions is used with a thin liner 2, ribs 3 of cap 1 might move within snap groove 13 of container 10. This movement would permit a cap 1, designed for use with a thicker liner 2, to s ide vertically with respect to container 10.
Alternative crimp tap seal and container combination 360 permits a single crimp top seal 400 of specified dimensions to be used with liners 2 of, varying thicknesses. (In fact, the seal. achieved by alternative crimp tap seal and container combination 360 allows the user to dispense with any liner 2.O A crimp tap seal 440 having dimensions which cause ribs 3 to seat in substanCially perfect alignment with ramp 340 of container 3.50, when a reJ.atively thin liner 2 is used, will also seal container 350 when a relatively thick liner Z is used. Although ribs 3 may "ride up" slanted top 342 of ramp 340 of cozitainer 350 when the thicker liner 2 is used, the seal of alternative crimp top seal and container combination 360 remains satisfactory.
Although this invention has been disclosed with reference to specific embodiments, it is apparent that other embodiments and equivalent variations of this 2D invention may be devised by those skilled in the art without departing from the true spirit and scope of this invention. The appended claims are intended to be construed to include all such embodiments arid equivalent variations.

Claims (8)

What is claimed is:

1. A container and crimp top seal combination having a vertical axis and adapted to form a securely sealed closure of said container, said combination comprising:

a container with an upper surface and a neck finish, said neck finish including:

(a) an upper flange, (b) a lower flange having a bottom, (c) an intermediate section disposed between said upper flange and said lower flange, (d) a shoulder disposed beneath said bottom of said lower flange, and (e) a reduced diameter section disposed concentrically with said vertical axis and between said bottom of said lower flange and said shoulder;

a crimp top seal formed of a resilient material and including:

(a) a diameter, (b) a top member having an underside, (c) a dependent skirt having an inner surface adapted to surround said neck finish and to mate therewith, said skirt extending axially downward from said top member and having a lower end substantially flush laterally with said bottom of said lower flange so that said reduced diameter section of said container provides an exposed vertical section between said crimp top seal and said container when said crimp top seal and said container are combined to permit handling of said container and crimp top seal combination with automated equipment, and (d) a plurality of flexible locking ribs, each angular in shape to allow tolerance variation and having a top and a bottom, positioned on said inner surface of said skirt at a corresponding plurality of axially intermediate positions and at circumterentially spaced locations around said intermediate section of said neck finish;

a first line of contact between said inner surface of said skirt of said crimp top seal and said neck finish of said container formed by said ribs engaging said intermediate section;

a second line of contact between said inner surface of said skirt of said crimp top seal and said neck finish of said container disposed axially above said first line of contact and formed by said upper flange and said skirt; and a third line of contact between said inner surface of said skirt of said crimp top seal and said neck finish at said container disposed axially below said first line of contact and formed by said lower flange and said skirt, said three lines of contact adapted to align said crimp top seal and said container and to secure a sealing engagement between said underside of said top member of said crimp top seal and said upper surface of said container.

2. The crimp top seal and container combination as recited in claim 1 wherein said crimp top seal further includes a crimp ring extending radially away from said lower end of said skirt, said crimp ring adapted to be crimped around said lower flange of said container thereby forming a fourth line of contact with said bottom of said lower flange to further align and seal said crimp top seal on said container.

3. The crimp top seal and container combination as recited in claim 1 wherein said crimp top seal further includes a plurality of lugs extending radially inward from said skirt at said lower end of said skirt and being circumferentially spaced at equidistant locations around said skirt, said lugs adapted to be crimped around the lower flange of the container thereby contacting the bottom of the lower flange to further align and seal said crimp top seal an the container.

4. The container and cap combination of claim 1 wherein said combination is adapted to form a securely sealed closure of said container via a pull down and lock mechanism.

5. The container and cap combination of claim 1 wherein said intermediate section of said neck finish of said container is a ramp having an inwardly slanted top and an outwardly slanted bottom.

6. A container and cap combination having a vertical axis and adapted to form a securely sealed closure of said container, said combination comprising:

a container with an upper surface and a neck finish, said neck finish having:

(a) a top flange including a top forming said upper surface of said container, (b) an axially displaced lower flange having a bottom, (c) a ramp having an inwardly slanted top and an outwardly slanted bottom and being disposed between said upper flange and said lower flange, (d) a shoulder disposed beneath said bottom of said lower flange, and (e) a reduced diameter section disposed concentrically with said vertical axis axed between said bottom of said lower flange and said shoulder; and a cap formed of a resilient material and including:

(a) a diameter, (b) a top member having an underside, (c) a dependent skirt having an inner surface adapted to surround said flanges and said ramp and to mate therewith, said skirt extending axially downward to be substantially flush laterally with said bottom of said lower flange so that said reduced diameter section of said container provides an exposed vertical section between said cap and said container when said cap and said container are combined to permit handling of said container and cap combination with automated equipment, and (d) a plurality of flexible locking ribs, each angular in shape to allow tolerance variation and having a top and a bottom, positioned on said inner surface of said skirt at an axially intermediate position and at circumferentially spaced locations around said ramp of said neck finish;

a first line of contact between said inner surface of said skirt of said cap and said neck finish of said container formed by said ribs engaging said ramp;

a second line of contact between said inner surface of said skirt of said cap and said neck finish of said container disposed axially above said first line of contact and formed by said top flange and said skirt; and a third line of contact between said inner surface of said skirt of said cap and said neck finish of said container disposed axially below said first line of contact and formed by said lower flange and said skirt, said three lines of contact adapted to align said cap and said container and to secure a sealing engagement between said underside of said top member of said cap and said upper surface of said container.

7. The container and cap combination as recited in claim 6 wherein said inwardly slanted top and said outwardly slanted bottom of said ramp each have an angle of about 12 degrees from vertical.

8. A container having a vertical axis and adapted for combination with one of a snap cap which includes locking ribs and a crimp sealed cap which includes a crimped skirt, said container comprising a neck finish with:

(a) a top flange including an outer surface with a diametric dimension and an axial dimension, each dimension having a tolerance;

(b) an axially displaced lower flange including an outer surface with a diametric dimension and an axial dimension, each dimension having a tolerance;

(c) an uninterrupted ramp having an inwardly slanted top and an outwardly slanted bottom and being disposed between said upper flange and said lower flange and defined by an axial height dimension and a lateral width dimension, each with a tolerance, said ramp of substantially V-shaped cross-section adapted to accept said locking ribs of said snap cap while allowing tolerance variation upon downward movement of said snap cap onto said container;

(d) a shoulder disposed beneath sand lower flange; and (e) a reduced diameter section disposed concentrically with said vertical axis for about 1/8 -3/16 inches in axial length and between said lower flange and said shoulder, said reduced diameter section exposed upon completed downward movement of said cap onto said container to permit handling of said container with automated equipment;

said dimensional tolerances of said ramp and said flanges adapted to serve as alignment means for said snap cap, said dimensional tolerances of said diametric dimension of said outer surface of said top flange and said lower flange being ~ 10 thousandths of an inch, said axially displaced lower flange and reduced diameter section adapted to receive said crimped skirt of said crimp cap sealed thereby, said container thereby adapted to receive either of two alternative types of cap, a top sealed snap cap and a crimp sealed cap.