U.S. patent number 3,842,790 [Application Number 05/270,905] was granted by the patent office on 1974-10-22 for container closure.
This patent grant is currently assigned to Bausch & Lomb Incorporated. Invention is credited to James A. Clark.
United States Patent |
3,842,790 |
Clark |
October 22, 1974 |
**Please see images for:
( Certificate of Correction ) ** |
CONTAINER CLOSURE
Abstract
An elastic closure member or stopper for a container which forms
a positive fluid tight seal with the container in which it is
received to thereby prevent fluid from passing inwardly or
outwardly under a wide variation of pressure and temperature. The
elastic closure member which includes cap portion and an integral
neck portion, has a before installation configuration which is
different from the configuration which is when received within the
container. This is due to the fact that the closure member is in
both tension and compression when it is received in the container.
The integral cap portion includes a bead or lip engaging portion
for engaging an uppermost edge proximate the mouth of the container
to best seal the inside of the container from outside
contamination. The lip engaging portion is spaced from a
circumferentially extending bead provided on the neck portion a
distance which is less in length than the neck length of the
container. To provide further assurance of a fluid tight engagement
between the closure member and the inner surface of the neck of the
container a second bead may be provided. The closure member may
also include a cylindrically shaped insert for providing a uniform
and constant radial sealing force between the central body of the
closure member and the neck of the container. Finally, a tool is
provided to aid insertion and extraction of the closure member.
Inventors: |
Clark; James A. (Mendon,
NY) |
Assignee: |
Bausch & Lomb Incorporated
(Rochester, NY)
|
Family
ID: |
23033330 |
Appl.
No.: |
05/270,905 |
Filed: |
July 12, 1972 |
Current U.S.
Class: |
215/228; 215/296;
215/355; 215/304; 215/364 |
Current CPC
Class: |
B67B
1/04 (20130101); B65D 39/04 (20130101); B67B
7/02 (20130101) |
Current International
Class: |
B65D
39/00 (20060101); B65D 39/04 (20060101); B67B
7/02 (20060101); B67B 1/04 (20060101); B67B
1/00 (20060101); B67B 7/00 (20060101); B65d
039/04 (); B65d 039/16 () |
Field of
Search: |
;215/47,48,52
;220/24.5,60 ;217/78,108,110,111 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
741,448 |
|
Dec 1955 |
|
GB |
|
1,133,724 |
|
Nov 1956 |
|
FR |
|
1,229,823 |
|
Mar 1960 |
|
FR |
|
Primary Examiner: Norton; Donald F.
Attorney, Agent or Firm: Parker; Frank C. Bogdon; Bernard D.
Morgan; DeWitt M.
Claims
I claim:
1. An article having a generally cylindrically shaped opening
extending from a lip to an internal shoulder and a closure member
formed of material having elastic properties for sealing said
opening, said closure member having an axis and including a cap
portion having a first diameter and an integral neck portion having
a second diameter, said first diameter being greater than said
second diameter, said cap portion including a top surface and a lip
engaging portion, said top surface being axially spaced from said
lip engaging portion, said neck portion extending along said axis
from said lip engaging portion to a bottom surface, said closure
member further including an outwardly extending endless bead and an
open ended cavity, said bead located on said neck portion between
said lip engaging portion and said bottom surface, wherein said
improvement comprises:
said bead being axially spaced from said lip engaging portion a
distance which is less than the distance from said lip to said
shoulder, said cavity extending from said top surface into said
neck portion to the approximate axial position of said bead to
thereby provide said closure member with a closed bottom extending
from the approximate axial position of said bead to said bottom
surface, the relationship between said bead and said closed bottom
permitting, when said closure member is properly received within
said opening, at least a portion of said neck portion to be in
tension to thereby hold said bead in engagement with said shoulder
and said lip engaging portion in engagement with said lip.
2. The article and closure member as set forth in claim 1 further
including an undercut where said neck portion merges with said lip
engaging portion.
3. An article having a generally cylindrically shaped opening
extending from a lip to an internal shoulder and a closure member
formed of material having elastic properties for sealing said
opening, said closure member having an axis and including a cap
portion having a first diameter and an integral neck portion having
a second diameter, said first diameter being greater than said
second diameter, said cap portion including a top surface and a lip
engaging portion, said top surface being axially spaced from said
lip engaging portion, said neck portion extending along said axis
from said lip engaging portion to a bottom surface, said closure
member further including an outwardly projecting endless bead and
an open ended cavity, said bead located between said lip engaging
portion and said bottom surface, wherein said improvement
comprises:
an additional outwardly extending endless bead, said endless bead
being axially spaced from said lip engaging portion a distance
which is less than the distance from said lip to said shoulder,
said additional bead disposed between said lip engaging portion and
said bead, said cavity extending from said top surface into said
neck portion to the approximate axial position of said bead to
thereby provide said closure member with a closed bottom extending
from the approximate axial position of said bead to said bottom
surface, the relationship between said bead and said closed bottom
permitting, when said closure member is properly received within
said opening at least a portion of said neck portion to be held in
tension to thereby hold said bead in engagement with said shoulder
and said lip engaging portion in engagement with said lip.
4. An article having a generally cylindrically shaped opening
extending from a lip to an internal shoulder and a closure member
formed of material having elastic properties for sealing said
opening, said closure member having an axis and including a cap
portion having a first diameter and an integral neck portion having
a second diameter, said first diameter being greater than said
second diameter, said cap portion including a top surface and a lip
engaging portion, said top surface being axially spaced from said
lip engaging portion, said neck portion extending along said axis
from said lip engaging portion to a bottom surface, said closure
member further including an outwardly projecting endless bead and
an open ended cavity, said bead located between said lip engaging
portion and said bottom surface, wherein said improvement
comprises:
an additional outwardly extending endless bead and an insert, said
endless bead being axially spaced from said lip engaging portion a
distance which is less than the distance from said lip to said
shoulder, said additional bead disposed between said lip engaging
portion and said bead, said cavity extending from said top surface
into said neck portion to the approximate axial position of said
bead to thereby provide said closure member with a closed bottom
extending from the approximate axial position of said bead to said
bottom surface, said cavity having an inner wall, the relationship
between said bead and said closed bottom permitting, when said
closure member is properly received within said opening, said bead
to be held in engagement with said shoulder, said lip engaging
means in engagement with said lip and said additional bead in
engagement with an intermediate portion of said opening, said
insert received within said cavity and contacting said inner wall
at least at the position of said additional bead to reinforce the
engagement of said additional bead with said intermediate portion
of said opening.
5. The article and closure member as set forth in claim 4 wherein
said insert is provided with a central opening for receiving a
tool.
6. An article having a generally cylindrically shaped opening
extending from a lip to an internal shoulder, a closure member
formed of material having elastic properties for sealing said
opening and a tool for inserting and removing said closure member
from said opening, said closure member having an axis and
comprising a cap portion having a first diameter and an integral
neck portion having a second diameter, said first diameter being
greater than said second diameter, said cap portion including a top
surface and a lip engaging portion, said top surface being axially
spaced from said lip engaging portion, said neck portion extending
along said axis from said lip engaging portion to a bottom surface,
said closure member further including an outwardly extending
endless bead and an open ended cavity, said bead located on said
neck portion between said lip engaging portion and said bottom
surface and axially spaced from said lip engaging portion a
distance which is less than the distance from said lip to said
shoulder, said cavity extending from said top surface into said
neck portion to the approximate axial position of said bead to
thereby provide said closure member with a closed bottom extending
from the approximate axial position of said bead to said bottom
surface, the relationship between said bead and said closed bottom
permitting, when said closure member is properly received within
said opening, at least a portion of said neck portion to be in
tension to thereby hold said bead in engagement with said shoulder
and said lip engaging portion in engagement with said lip, said
tool including a dowel portion and a U-shaped cutout portion, said
dowel portion configured so as to be receivable within said cavity
to facilitate insertion of said closure member into said opening,
said cutout portion configured so as to closely engage said neck
portion and including a ramp to permit easy insertion of said
cutout portion between said lip engaging means and said lip when
said closure member is received within said opening to thereby
facilitate removal of said closure member from said opening.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a closure member for a container, and
more particularly for a closure member for a container subject to a
wide variation of temperatures and pressures.
2. Brief Description of the Prior Art
A study of the prior art relating to closures for containers
reveals that the design of closures had progressed on the basis of
solving closure problems as they arise. Each field of use has
different problems the solutions to which, in many instances, do
not apply to other fields of use. A great deal of prior art exists
in the field relating to the capping of wine bottles, particularly
where the contents are to be under pressure. In addition, in the
beverage and food industries, a great number of closure devices
have been designed which are expendable. Other closures are
intended to have a very short life, since many of the containers
for which they are intended carry expandable or perishable
merchandise which is usually quickly consumed or disposed of in
some fashion. Those closure devices which are used for beverages,
for example, generally are physically touched by the consumer and
are only intended to make what might be considered to be a
satisfactory seal for general consumer use, but in most instances
would be an entirely unsatisfactory seal for other commercial
considerations where the containers are used in a generally "clean"
environment, particularly sensitive to contamination.
In French Patent No. 1,229,823, published Sept. 9, 1960, there is
disclosed an invention which relates to a shut-off device intended
to close an orifice of a tank under internal pressure. In the
French patent it states that prior art devices include plugs which
may be screwed into container walls to close holes or plugs of
compressible materials generally known as stoppers. Additionally,
it states that most of the prior known devices present the same
inconvenience in that they require a tool in order to be put into
place while those plugs which cannot be applied without a tool do
not resist high pressure. To remedy the foregoing problems the
French patent discloses a removable closing device for use on a
container which is subject to internal pressure. The disclosed
device includes a generally elastic stopper which has an internal
opening for receiving a plunger which basically acts as a tool for
inserting the device into a selected container and for remaining
engaged therewith as long as the stopper is in place in order that
the stopper resist high pressure. The plunger has an annular groove
circumferentially extending about it to receive deformed elastic
stopper material which is subjected to the internal pressure of the
container. With stopper material being urged into the annular
groove of the plunger, it is particularly difficult to remove the
plunger therefore it is especially difficult to remove the stopper
since the stopper most probably could not be removed unless the
plunger was removed firstly. This is a two part plunger stopper
arrangement and even though it is useful, it is more costly and
less convenient to use than the hereafter disclosed invention.
It should be appreciated from this that a satisfactory closure
which is relatively inexpensive is needed for example, for
adequately pathologically sealing pharmaceutical apparatus which
might possibly include such things as contact lenses.
SUMMARY OF THE INVENTION
This invention provides an improved closure which overcomes the
hereinbefore mentioned shortcomings and offers a sealing device for
a container which is very reliable and provides strong assurance
that articles sealed within the container will not be contaminated
from outside sources providing the closure is properly in place. In
addition, under other pressure influences, materials sealed within
a container can not leak out to adversely affect an outside
environment. A closure formed of elastic material which is
dimensioned to be both in tension and compression when engaged with
a container provides a seal which overcomes a great number of the
major shortcomings of the prior art devices particularly when they
are subjected to varying temperatures and pressures. The closure is
such that once inserted in the container any built-up internal
pressure continually causes the seal to improve. The built-up force
exerted on the closure surface within the container would for other
devices tend to expell the closure from the container, but in the
case of this invention the force actually acts to better seal
between the closure and the container. In one embodiment of the
invention a cylindrical sleeve is incorporated for use with the
closure in order to provide an improved positive fluid tight seal
at the neck of the container .
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded view of one embodiment of the closure device
according to the present invention and tool for inserting such
closure into a bottle; the closure member being illustrated in
partial cross-section.
FIG. 2 is a cross-sectional view of the closure of FIG. 1.
FIG. 3 is a partial cross-sectional view of the closure of FIGS. 1
and 2 engaged with the container.
FIG. 4 is an illustration of the closure member of FIG. 1 being
removed from the container with the aid of the tool.
FIG. 5 is an exploded view of elements according to the principles
of the invention wherein a modified closure is illustrated for
engagement with a container and a closure sleeve insert is further
illustrated for improving the seal of the closure to the
container.
FIG. 6 is a partial cross-sectional view of the embodiments
according to FIG. 5 in position for being engaged with each other
with the aid of the tool.
FIG. 7 is a partial cross-sectional view of the elements of FIG. 5
in their final assembled relation.
FIG. 8 is an illustration of the embodiment of FIG. 5, being
removed from the container with the aid of the tool.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIGS. 1-3 illustrates the first embodiment according to the
principles of the present invention, with FIG. 1 depicting a
typical container or bottle 10 disposed for receiving a stopper 12
with the use of a tool 14. The stopper 12 is shown in FIG. 2 in a
before installation configuration and in FIG. 3 in an installed
configuration. The stopper 12 is best adapted to provide a fluid
tight seal engagement with a container of the type identified as
glass bottle 10. The bottle 10 has an internal shoulder 16 which is
generally of a rounded circular configuration and is formed by the
merging between an inner neck 18 of the bottle 10 and a major inner
conical wall 20.
Since it is highly desirable that there be a very tight engagement
between the stopper 12 and the inner neck 18 of the bottle 10, it
will be appreciated that the stopper is ideally constructed of an
elastic material such as one having a silicone rubber base.
Further, it is desirable to have the length of the stopper 12, when
it seals with the bottle 10, slightly shorter than the opening to
be closed and the diameter of the stopper 12 at the sealing portion
slightly greater in size than the opening to be closed. The stopper
12, which is symmetrical about axis 13, includes a top or upper
surface 22 and a bottom surface 21. From FIG. 2, it is readily seen
that before installation the upper surface 22, which is a part of a
cap or top portion 23 of the stopper 12, is at a different aspect
with respect to other lines of the stopper's configuration than
when engaged with the bottle 10, as viewed in FIG. 3. Further, the
proportions of the stopper 12, as illustrated in FIG. 2, fairly
well define the wall thickness of the stopper 12 relative to its
overall width and length. Additionally and in particular, it should
be noted that a central opening 24 in the stopper 12 extends to a
bottom surface 25 to provide a closed bottom 27. Surface 25 which
is disposed in a plane B--B', which plane is substantially in the
plane of a circumferentially disposed endless bead 26 extending
about the stopper 12. The approximate even level of surface 25 with
the endless bead 26 provides a particularly significant feature of
this invention, one which will be more fully discussed hereinafter
as being a configuration which enables significant internal
pressures to be maintained in the bottle 10 without expelling or
explosion of the stopper 12 from the bottle 10.
In order to provide a stopper capable of overcoming the
deficiencies of the prior art devices, it will be appreciated that
a tool may be particularly helpful for insertion of a suitably
provided stopper. Although a stopper according to the principles of
the present invention can be inserted without the aid of a tool,
the tool 14 is a significant contribution to the invention and
greatly enhances the versatility and usefulness of the stopper 12.
To best illustrate the tool 14, it is shown in FIG. 1 in an
inverted aspect with respect to the position it assumes when being
used to insert the stopper 12 into the bottle 10. The construction
line A--A' of FIG. 1 points out the inversion of the tool 14. The
tool 14 may be of any suitable material including one of those in
the metal families such as stainless steel or any of the generally
inexpensive materials which are available in the plastic
family.
When inserting the stopper 12 into the bottle 10, a dowel extension
28 of the tool 14 is fully seated into the opening 24 for the dowel
tip to engage and contact the bottom 25 of the opening 24.
Initially, the stopper 12 is placed in intimate contact with the
uppermost lip 29 of the bottle 10 to an extent where the
circumferential bead 26 is disposed above the lip 29 and is just
short of engagement with it. A sufficient force exerted on that
side of the tool 14 opposite the dowel 28 stretches the stopper 12
to an extent that the bead 26 slips into and down through the inner
neck portion 18 of the bottle 10 to fully seat and tightly engage
with the internal shoulder 16 of the bottle 10, as best seen in
FIG. 3. In addition, a central neck portion 30 of the stopper 12
tightly engages the inner neck 18 of the bottle 10. During
insertion of the stopper 12, the bead 26 stretches and relatively
easily passes into the bottle 10. Since the diameter of the dowel
extension 28 is less than the diameter of the opening 24 in the
stopper 12, any material of the bead 26 which does not stretch
sufficiently to enter the neck 18 of the bottle 10 is temporarily
forced inward toward the dowel extension 28 until the bead 26 is
totally through the neck 18 of the bottle 10. This inward movement
of the elastic material of bead 12 is facilitated by the downward
movement of bottom 25 below the level of plane B--B' as dowel 28
stretches stopper 12. An example of this condition is present
hereinafter with reference to FIG. 6.
Since the stopper 12 is intended to be used repeatedly, there may
be a concern that the elastic material of the stopper 12 may be
overstretched to a point of separation when the dowel 28 forces the
stopper 12 into the container of the bottle 10. To preclude
overstretching the elastic material of the stopper 12, the dowel 28
may be of a predetermined length to enable easy insertion of the
stopper 12 and to safely limit the stretching of the elastic
material. Accordingly, a top circular area 31 of a frustum shaped
base 32 of the dowel 28 contacts the upper surface 22 of the
stopper top portion 23 when the dowel 28 is fully inserted to
preclude overly stretching the stopper 12.
When the stopper 12 is fully engaged with the bottle 10, it is
easily appreciated that an integrally formed elastic bead or lip 33
extending about the undersurface of cap portion 23 is tightly
engaged with the bottle 10 at the uppermost lip 29. This tight
engagement is obtainable, at least in part, due to the undercut
configuration generally at that circular portion 34 where the
central neck portion 30 and the underside of cap portion 23 merge
together. Due to the length of the stopper 12 being slightly
shorter than the length of the opening to be closed, the stopper
12, when engaged with the bottle 10, stretches and causes the
stopper lip 33 at the uppermost bottle edge 29 to tightly seal the
bottle 10. This is best seen in FIG. 3, where the stopper 12 is
engaged with the bottle 10 and the elastic lip 33 is deformed from
its before installation configuration as illustrated in FIG. 2. It
will be appreciated from FIG. 3 that the engagement of the stopper
12 with the bottle 10 provides fluid tight engagement from the
circumferential bead 26 upward throughout the inner neck 18 of the
bottle 10 to the uppermost edge 29 at the mouth of the bottle 10.
In addition as before stated, the engagement is fluid tight at the
elastic lip 33 of the stopper 12 bearing against the uppermost edge
29 of the bottle outward from the mouth of the bottle 10. With the
engagement and configurations as typically illustrated in FIG. 3,
pressures internal to the bottle can substantially exceed 65 p.s.i.
and temperatures can exceed 240.degree.F without forcing the
stopper 12 out of engagement with the bottle 10. With this
configuration it will be appreciated that the higher the internal
pressure is in the bottle, the tighter will bead 26 be pressed
against the bottle thereby effecting a tighter seal. This tighter
seal with increased pressure is accomplished without the aid of an
insert plunger as hereinbefore mentioned as being necessary with
regard to the aforementioned French Patent No. 1,229,823. In
addition, the greater the ambient pressure the tighter is the seal
accomplished at the lip 33 of the stopper 12 and the uppermost edge
29 of the bottle 10. These tighter seals, respectively, preclude
leakage from inside outward and outside inward.
Even though the stopper 12 tightly engages the bottle 10 it can
easily be removed with the aid of the tool 14. FIG. 4 illustrates,
in part, the tool 14 engaged with the stopper 12 under the
stopper's top portion 23 so that elastic bead 33 bears against a
U-shaped land portion 35 of the tool 14. A U-shaped cutout 36 of
the tool 14 at its innermost semicircular portion 38 closely
engages the central neck 30 of the stopper 12. For easily inserting
the tool 14 around the central neck 30, ramps 40 and 42 are
provided at the open end of the U-shaped land portion 35. After the
tool 14 is fully engaged with the stopper 12, the tool 14 is
pivoted about the uppermost edge 29 of the bottle in the direction
indicated by arrow 44 of FIG. 4. Due to the elastic configuration
of the stopper 12 it can be removed with relative ease since the
lower bead 26 is tipped sideways so that it can become oblong to
easily pass through the neck 18 of the bottle 10 and will stretch,
as is generally illustrated in FIG. 4, until bead 26 is turned
partially sideways for easy extraction above the inner neck 18 of
the bottle 10.
It is emphasized that removal of the stopper 12 from the bottle 10
is relatively simple and can be done without great effort since the
pivoting action of the tool 14 allows the lower bead 26 to exit
through the neck 18 by only slightly deforming that part of the
bead 26 on the side opposite the pivot area of the tool 14 until
that part of the bead 26 is in the opening of the bottle 10. Once
that part of the bead 26 is in the opening and clear of the
internal shoulder 16 of the bottle 10 it generally takes on its non
deformed configuration and the remaining part of the bead 26 is
forced upward by means of the pivoting tool 14 until substantially
half of the circular bead 26 is forced past the internal shoulder
16 onto the inner neck 18 up to the uppermost lip 29 of the bottle
10. When half or slightly over half of the bead 26 is past the
uppermost lip 29, the stopper 12, due to its elastic strength,
forces the remaining portion of the stopper 12 engaged with the
bottle 10 from the bottle 10 to totally disengage the stopper 12
from the bottle 10. During the process of disengagement, it can
easily be seen that the plane B--B' through bead 26 changes from
being substantially at right angle to a longitudinal axis of the
bottle 10 when fully engaged therewith, to curve upward until the
plane B--B' is practically parallel to the longitudinal axis of the
bottle 10.
Removal of the stopper 12 is convenient and without mess for an
operator generally would hold the bottle in one hand while
actuating the tool 14 in his other hand. The design of the tool 14
is such that the stopper 12 once removed from the bottle 10,
remains in contact with the tool 14 and can easily be slid from the
U-shaped cut out 36 and be set aside for further use, including
being reinserted into the bottle 10 as need be. The materials and
configurations are such that the stopper and tool are not expected
to be expendable or destroyed even after being used repeatedly in
insertions and removals.
Embodiment illustrated in FIGS. 5-8 are similar in many respects to
the embodiment illustrated in FIGS. 1-4 and like reference
characters refer to like parts. This alternate embodiment includes
a stopper 50 for use with an insert 52 to cooperatively provide a
positive fluid tight seal between neck portion 30 and bottle neck
18. The stopper 50 differs from the stopper 12 in at least two
ways, as hereinafter mentioned. The stopper 50 includes a circular
bead 54 encompassing the stopper centrally about the neck portion
30 of the stopper 50. Ideally, the bead 54 protrudes outwardly from
the stopper central neck portion 30 less than a second bead 56
located substantially toward that end of the stopper farthest from
the top portion 23 of the stopper 50. The centrally disposed bead
54 provides further assurance of a fluid tight engagement between
the stopper 50 and the inner neck 18 of the bottle 10.
To insure tight engagement between the central bead 54 and the
inner neck 18 of the bottle a tubular sleeve insert 52 is provided.
The insert 52 seats within an annular recess 58 within the top
portion 23 of the stopper 50, as best seen in FIGS. 6 and 7. The
insert 52 has a central opening 60 for receiving the dowel 28 of
the tool 14 and is generally cylindrical for snug engagement with a
central opening 62 of the stopper 50. In addition, a cap portion 64
of the insert 52 is configured to closely fit within the annular
recess 58 of the stopper 50 to substantially provide a plane
defined by the top of the cap 64 and the upper surface 22 of the
stopper 50. The stopper 50 with the insert 52 is urged into tight
engagement with the bottle 10 in a means similar to that discussed
for FIGS. 1-4. It will be appreciated that the sleeve 52 may be of
other simple configuration, such as being completely cylindrically
shaped.
FIG. 6 best illustrates the insertion of the stopper 50 into the
bottle 10. It should be noted that because the bead 54 extends
outwardly from the central neck portion 30 of the stopper 50 that
during insertion, as partially shown by FIG. 6, the elastic
material is forced inward, as illustrated by the bulbous
configuration 66 which extends inwardly about the opening 62 in the
stopper 50. However, it will be appreciated that after insertion of
the stopper 50 into the bottle 10, as shown in FIG. 7, the insert
52 extends sufficiently down into the neck of the bottle 10 to
force the elastic material in all directions particularly toward
the inner neck 18 of the bottle 10 and thereby provides a uniform
force to insure a positive fluid tight seal of the stopper 50 with
the bottle 10.
The circular bead 68 may be included at the under surface of the
top portion 23 of the stopper 50 to more positively seal the bottle
10 at uppermost edge 29 in a manner similar to the seal provided by
stopper lip 33 as hereinbefore explained. In addition, as a measure
of sealing for control purposes, an expendable cap 70 formed, for
example, of aluminum may be crimped about the insert-stopper
configuration engaged with the bottle 10, as shown in FIG. 7.
Removal of stopper 50 is equally as easy as the removal of the
stopper 12, as earlier discussed in conjunction with FIG. 4. In
FIG. 8 it is readily seen that the tool 14 may be pivoted against
the edge of the bottle 10 to remove the stopper 50 from the bottle
10 by urging the sealing beads 54 and 56 upward in a tilting manner
so that the beads appear substantially oblong in the neck of the
bottle and are lifted until they are no longer in contact with the
bottle 10.
* * * * *