U.S. patent number 3,712,498 [Application Number 05/193,129] was granted by the patent office on 1973-01-23 for container closure.
This patent grant is currently assigned to Aluminum Company of America. Invention is credited to Kenneth C. Lawrence.
United States Patent |
3,712,498 |
Lawrence |
January 23, 1973 |
**Please see images for:
( Certificate of Correction ) ** |
CONTAINER CLOSURE
Abstract
A container assembly for providing a sterile sealed container
including a container having a neck provided with an annular mouth
defining bead and a multipiece closure having a sealing member, a
locking member and a cover secured thereto. The mouth defining bead
has an upper surface, an exteriorly disposed downwardly and
inwardly inclined closure anchoring shoulder defining surface and
an outer surface connecting the upper surface with the shoulder
defining surface. The locking member has a top panel with an
opening therein and a depending skirt which has a lower surface
radially inwardly deformed into locking engagement with the
anchoring shoulder. At least two radially outstruck lugs formed
within the locking member skirt. A portion of the sealing member
compressively secured between the locking member and the container
neck. The cover having a top panel and a skirt having a lower
portion deformed radially inwardly to a diameter less than the
diameter of the locking member taken at the position of at least
one outstruck lug. At least one radially inwardly directed
embossment formed in the cover skirt at a height generally the same
as the lugs. Rotation of the cover with respect to the locking
member causes the embossment to permanently inwardly reform the
outstruck lugs and permit relative axial separation of the closure
and locking member.
Inventors: |
Lawrence; Kenneth C. (Richmond,
IN) |
Assignee: |
Aluminum Company of America
(Pittsburgh, PA)
|
Family
ID: |
22712376 |
Appl.
No.: |
05/193,129 |
Filed: |
October 27, 1971 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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155731 |
Jun 23, 1971 |
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Current U.S.
Class: |
215/247;
215/277 |
Current CPC
Class: |
B65D
51/002 (20130101) |
Current International
Class: |
B65D
51/00 (20060101); B65d 041/42 () |
Field of
Search: |
;215/38R,40,7 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Hall; George T.
Parent Case Text
This application is a continuation-in-part of U.S. application Ser.
No. 155,731, filed June 23, 1971, entitled "Container Closure".
Claims
I claim:
1. A closure assembly comprising
a sealing member having a continuous upper panel portion and
composed of a resilient material,
a locking member having a top panel provided with an opening and a
depending skirt which is adapted to be anchored to a container
neck,
a cover having a top panel and a depending skirt,
said sealing member disposed within said locking member,
said locking member disposed at least in part within said
cover,
said locking member skirt having at least two integrally formed
radially outstruck lugs,
said cover skirt having a radially restricted lower portion with a
diameter less than the external diameter of said locking member
taken at the location of at least one said lug,
said cover portion having at least one radially inwardly directed
embossment disposed at generally the same height as said lugs,
and
the minimum diameter of said cover skirt at said radially
restricted skirt portion is less than the diameter of said locking
member at said lug, whereby relative axial separation of said
locking member and said cover is prevented until relative
rotational movement of said cover with respect to said locking
member has caused said embossments to permanently deform said lugs
radially inwardly.
2. The closure assembly of claim 1 including
said cover skirt extends downwardly beyond said lugs and terminates
short of the lower extremity of said locking member skirt, and
said embossment projects inwardly a distance substantially equal to
the outward projection of said lugs.
3. The closure assembly of claim 2 including
said cover skirt lower extremity having a radially inwardly
projecting hollow bead.
4. The closure assembly of claim 2 including
said locking member having at least three said lugs, and
each said lug having a radially outwardly projecting lower edge
defined at least in part by a generally horizontally disposed
slit.
5. The closure assembly of claim 2 including
said locking member has at least three said lugs,
said cover member has the same number of embossments as said
locking member has lugs,
said lugs are defined by a pair of generally horizontal slits and a
connecting vertical slit, and
said lugs are connected to said locking member skirt by a generally
vertically disposed hinge portion.
6. The closure assembly of claim 2 including
said cover top panel having a hollow depressed section,
said sealing member being composed of a resiliently compressible
material,
said hollow depressed section in overlying downwardly directed
resilient deforming contact with said sealing member, whereby
said sealing member exerts on upward resiliently established force
in said cover.
7. The closure assembly of claim 5 including
said lugs all have their free ends projecting in the same
circumferential direction,
said embossments have a generally convex inward curvature,
said lugs originate at a position closely adjacent said locking
member top panel,
said embossments originate at a position closely adjacent said
cover top panel, and
the mean diameter of said cover skirt apart from said embossments
is greater than the mean diameter of said locking member skirt
apart from said lugs.
8. A container assembly comprising
a container having a neck provided with an annular mouth defining
bead,
said mouth defining bead having an upper surface, an exteriorly
disposed inwardly inclined closure anchoring shoulder surface and
an outer annular surface connecting said upper surface with said
shoulder surface,
a multipiece closure having a sealing member, a locking member and
a cover,
said locking member having a top panel with an opening therein and
a depending skirt which has a lower portion directed generally
radially inwardly into locking engagement with said shoulder
surface,
at least two radially outstruck lugs formed within said locking
member skirt,
a portion of said sealing member compressively secured between said
locking member and said container neck,
said cover having a top panel and a skirt having a lower portion
directed generally radially inwardly to a diameter less than the
mean diameter of said locking member taken across at least one said
outstruck lug, and
at least one radially inwardly directed embossment formed in said
cover skirt at such a height as to mechanically engage and reform
said outstruck lugs when relative rotational movement is effected
between said locking member and said skirt.
9. The container assembly of claim 8 including
said cover skirt having a diameter at its lower extremity which is
greater than the mean diameter of said locking member skirt,
and
said sealing member having a continuous top panel of larger
diameter than said container mouth.
10. The container assembly of claim 8 including
each said lug has a radially outwardly projecting lower edge
defined by a substantially horizontal slit.
11. The container assembly of claim 8 including
said lugs are defined by a pair of substantially horizontal slits
which are connected by a vertical slit,
said locking member has three said lugs, and
said cover member has three said radially inwardly directed
embossments.
12. The container assembly of claim 9 including
said cover skirt lower portion terminating in a radially inwardly
projecting hollow bead.
13. The container assembly of claim 9 including
said sealing member composed of a resiliently compressible
material,
said cover top panel having a depressed portion which is generally
centrally disposed, and
said depressed top panel portion in overlying contacting
relationship with respect to said sealing member top panel.
14. The container assembly of claim 9 including
said cover member having the same number of radially inwardly
directed embossments as said locking member has lugs, and
the circumferential spacing between adjacent radially inwardly
directed embossments is generally equal to the circumferential
spacing between adjacent lugs, whereby all of said lugs will be
radially inwardly reformed responsive to the establishment of
relative rotation of said cover with respect to said locking member
through an arc of not greater than 180.degree. to permit relative
axial separation between said cover and the remainder of said
closure assembly.
15. The container assembly of claim 9 including
at least a major portion of each of said lugs disposed at a level
higher than said outer surface of said container bead, and
said cover skirt terminating at a position lower than and closely
adjacent to the lower extremities of said lugs.
16. The container assembly of claim 15 including
said cover and locking member composed of a substantially rigid
deformable material,
said sealing member composed of a resiliently compressible
material,
said outstruck lugs disposed at a level beneath the plane of said
locking member top panel, and
said radially inwardly directed embossments disposed beneath the
plane of said cover top panel.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to multipiece tamperproof closures to be
employed with sterile containers. More specifically, this invention
relates to such closures which may readily be opened without the
need to exert a force sufficient to physically destroy the
integrity of the cover member. Description of the Prior Art
Sterile containers for use with pharmaceuticals and similar
materials must not only maintain their sterile internal condition,
but must also be adapted for ready removal at the time the user
requires access to the container contents. In addition, as the
materials provided in such containers are frequently vital to human
health, it is essential that the container provide a reliable
indication of any prior use or access to the container contents as
such exposure will generally have a potentially serious
contaminating effect.
Various forms of sterile containers for such end uses have been
known. These generally consist of multipiece closures with the
innermost closure portion consisting of a resiliently compressible
sealing member having a top panel portion which is adapted to rest
upon the upper sealing surface of the container mouth defining
neck. In addition, such sealing members frequently have portions
extending downwardly into the container mouth in order to establish
an inner side seal in addition to the top seal.
Another component generally employed is a locking element which has
a top panel provided with an opening of sufficient size to permit
access to the underlying sealing member by means of the needle
portion of a syringe. The locking member is generally secured to
the container by having a skirt portion which depends from the
outer periphery of the panel portion deformed generally inwardly
into locking engagement with a container bead. Frequently there is
also provided an outer disc-like member which rests on the sealing
member and not only serves to prevent access to the sealing member,
but also serves as a dust cover to prevent accumulations of dirt
and other foreign matter on the upper surface of the sealing member
panel. Such accumulations could result in some of the materials
entering the container interior when the needle portion of a
syringe is inserted through the sealing member. The final component
in such structures is generally an overlying closure element. The
closure element is adapted to hold the disc-like member in place
and prevent access to the resiliently compressible sealing member
without first requiring that the user physically alter the
structural characteristics of the outer member in such an
irreversible fashion as to provide a clear indication of use.
Frequently, the locking element, the disc-like member and overlying
closure are eliminated and a unitary element, having a locking
skirt portion and a generally continuous top panel provided with a
removable sector defined by weakened lines, is substituted. Several
forms of such closures are illustrated in U. S. Pat. Nos.
2,387,955, 2,387,956, 3,013,687, 3,193,128, 3,480,171 and
3,358,865.
As a result of the seriousness of risk involved were undetected
tampering to occur, the above-described forms of closures have
generally been designed so as to provide not only an indication of
tampering, but also sufficient physical distortion of the overlying
closure element to preclude restoration of the closure to its
original condition. In connection with threaded closures, numerous
forms of tamperproof devices have been suggested. As these closures
generally provide a visual indication of tampering, but do not
preclude restoration of threaded engagement between the threaded
closure and container, such closures have not been used for sterile
containers for pharmaceuticals and the like. Examples of such
threaded closures are shown in U. S. Pat. Nos. 2,066,708,
2,414,420, 2,162,713, 3,106,808, 2,470,557 and 2,214,255. Not only
do these structures present the serious risk of a second user not
being provided with an effective indication that the closure has
been used, but also many of the structures require the use of
unconventional, unsymmetrical irregularly configurated glass
finishes and unorthodox filling techniques which are cumbersome and
relatively expensive.
There remains, therefore, the need for a tamperproof closure for
use with sterile containers which will reliably leave visual as
well as mechanical evidence of prior tampering. In addition, there
remains a need for such a closure wherein the closure may be
employed with conventional glass finishes and may be sealingly
affixed to the container. Finally, ease of opening characteristics
which will facilitate removal of the cover cap with one hand while
a physician or nurse or other user is holding a syringe in the
other hand is needed.
SUMMARY OF THE INVENTION
The closure assembly of this invention has solved the
above-described problems. It will effectively retain sterility and
possess great ease of opening characteristics, while being adapted
to be economically employed with existing glassware and sealing
equipment.
The assembly of this invention provides a sealing closure, which
may take the form of a headed rubber stopper, a locking member and
a cover. The sealing member is secured to the container in normal
fashion and the locking member is permanently anchored to the
container neck in a conventional manner to provide a permanently
sealed container with access to the container contents being
permitted by means of the needle portion of a syringe or similar
equipment, which is adapted to be extended through the resilient
sealing member to establish communication with the container
interior. The cover member overlies the locking member and has a
continuous panel portion and a depending skirt which is preferably
shorter than the skirt of the locking member. The locking member
skirt is provided with at least two integrally formed outstruck
lugs. The cover skirt is provided with at least one inwardly
directed embossment which is disposed generally at the same height
as the lugs. The lower portion of the cover skirt is directed
generally radially inwardly and has a diameter which is less than
the diameter of the locking member taken at a position of at least
one lug. In this fashion access to the sealing member cannot be
obtained without removing the cover and leaving irreversible
physical evidence of such removal. The dimensions of the outstruck
lugs and restricted lower cover skirt portion are such that
mechanical resistance to relative axial separation of the locking
member and cover is provided.
In effecting opening of the container one need merely establish
relative rotational movement between the cover and the locking
member. This movement causes the embossment to engage one or more
lugs and permanently deform the same radially inwardly, thereby
establishing clearance for relative axial separation of the cover
from the locking member. As the lugs cannot be returned to the
precise position which would permit locking of the cover onto the
closure assembly while resisting relative separation, irreversible
tangible evidence of prior use is presented.
In a preferred form, at least two to four circumferentially spaced
integral lugs would be provided and an equal number of embossments
having the same circumferential spacing between adjacent
embossments as between adjacent lugs would be provided. This
facilitates increased ease of opening as the user need only rotate
the cover through an angle which is not greater than 180.degree. in
order to permanently deform all of the lugs to a noninterfering
position.
It is an object of this invention to provide a closure assembly
which is adapted to effectively maintain the sterile condition of a
sealed container while possessing improved ease of opening
characteristics and providing tangible evidence of any effort to
gain access to the container contents.
It is another object of this invention to provide such an assembly
wherein there is positive mechanical interference to separation of
the cover portion from the remainder of the assembly and such
interference cannot be eliminated without permanently deforming a
portion of the closure assembly.
It is another object of this invention to provide such a closure
assembly which is adapted to be employed with conventional glass
finishes, conventional sealing techniques and is adapted to
function in the same manner as conventional containers of this type
after the cover has been removed.
It is yet another object of this invention to provide such a
closure assembly wherein the tamperproof closure can be opened with
one hand in rapid fashion while providing a positive indication
that the container has not been previously used.
These and other objects of the invention will be more fully
understood from the following description of the invention, on
reference to the illustrations appended hereto.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a partially broken away illustration of a type of sealed
container contemplated by this invention.
FIG. 2 is a partially broken away plan view of a form of closure
assembly contemplated by this invention.
FIG. 3 is a sectional illustration showing the respective closure
assembly components in position taken through 3--3 of FIG. 1.
FIG. 4 is an elevational view of the locking member of the closure
assembly of this invention.
FIG. 5 is an elevational view of the cover member of the closure
assembly of this invention.
FIG. 6 is a plan view of a modified form of cover member for a
closure assembly of this invention.
FIG. 7 is an elevational cross sectional illustration of the cover
member of FIG. 6 taken through 6--6 of FIG. 6.
FIG. 8 is a cross sectional illustration generally similar to FIG.
3 but showing the cover member of FIG. 6 in a closure assembly.
FIG. 9 is an elevational cross sectional illustration of the form
of stopper of FIG. 8.
FIG. 10 is an elevational view of a locking member of this
invention showing a modified form of a lug structure.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now more specifically to FIG. 1, it is seen that there is
shown a container 2 which has been illustrated as a small mouth
bottle. A closure assembly 4 which has a locking member 6 and a
cover member 8 is secured to container 2. As is shown in FIGS. 2
and 3, the container has a conventional form of container neck 10
which is provided with a mouth defining bead 14. The bead has an
inner surface 16, an upper surface 18, an exteriorly disposed
inwardly directed closure anchoring shoulder defining surface 20
and an annular outer surface 22 connecting upper surface 18 and
anchoring shoulder surface 20. The anchoring shoulder surface 20
preferably is generally horizontally disposed or is disposed in a
downward direction at an angle of less than about 15.degree. with
respect to the horizontal. The bead 14 serves to define the
container mouth indicated generally by the reference numeral
24.
The closure assembly 4 has a resilient sealing member 30 which is
provided with a top panel 32 and a depending annular sealing
portion 34. It will be seen that the undersurface of the outer
portion of top panel 32 is in sealing engagement with upper surface
18. The outer part of sealing portion 34 is in sealing engagement
with inner surface 16.
Referring now to FIGS. 3 and 4, and considering the locking element
40, it is seen that the locking element has a top panel 42 which
contains a generally centrally disposed opening 44. The locking
element 40 also has a depending skirt 46 which extends downwardly
and has a lower sector 48 which is deformed generally radially
inwardly and downwardly into locking engagement with anchoring
shoulder surface 20. In securing the closure 4 to the container 2
prior to establishment of lower sector 48, top pressure is applied
in order to compress portions of top panel 32 of sealing member 30.
In this fashion, forming sector 48 results in the gasket being
secured and retained in its compressed sealing condition by locking
element 40. When the cover 50 is removed, access to the container
contents may be had by means of the needle of a syringe by passing
the same through opening 44 and through the center portion of top
panel 32 of sealing member 30. The material out of which the
sealing member 30 is composed is generally such that withdrawal of
the needle will result in reclosure of the opening previously
established thereby.
Referring now to FIGS. 2, 3 and 5, the structure of the cover 50
will be considered. The cover 50 has a top panel 52 and a skirt 56.
The top panel 52 is in overlying surface to surface contact with
top panel 42 of locking element 40. It is noted that in the
preferred form which has been illustrated, skirt 56 is
substantially shorter than the skirt 46 of locking element 40.
As is shown in FIG. 4, the skirt 46 of locking element 40 is
provided with several radially outstruck integrally formed lugs 60.
The lugs are defined by slit 64 and bends or slits 62, 66. They are
connected to the skirt 46 by means of vertically disposed hinge 68.
It is noted that the lugs 60 are disposed in the upper portion of
the skirt 46 in a position closely adjacent to the top panel 42 but
below the plane thereof.
Referring now to FIG. 5, it is seen that the cover skirt 56 is
provided with a number of radially inwardly directed embossments 70
which originate at a position closely adjacent to top panel 52, but
below the plane thereof and extend downwardly toward the lower
skirt portion 72. The embossment 70 have an inwardly convexly
curved configuration. In the preferred form the outward projection
of the lugs 60 is generally equal to the amount of inward
projection of embossments 70.
As will be appreciated from FIG. 3, the lower portion 72 of cover
skirt 56 has a diameter which is less than the diameter of the
locking element 40 taken at the position of one of the lugs 60. As
a result, any effort to effect relative axial separation between
locking element 40 and cover 50 will result in interengagement
between lower cover skirt portion 72 and lugs 60 and thereby
prevent such separation. In operation of the closure shown in FIG.
2, the cover is subjected to relative rotational movement in a
clockwise direction. This causes the embossments 70 to engage the
outstruck lugs 60 and permanently deform the same radially
inwardly. In FIG. 2 the embossment 70 will first engage lugs 60 at
hinge 68 and progressively move toward slit 64. After this has been
accomplished, the cover 50 may be axially separated from the
locking element 40 without the interference which previously was
present as a result of the original configuration of lugs 60.
While it is only necessary to provide two lugs 60 and a single
embossment 70, it is preferred to provide additional lugs 60 and
embossments 70. It will be appreciated that as the number of lugs
is increased the resistance to relative axial separation of locking
element 40 and cover 50 is increased. It will further be
appreciated that as the number of embossments 70 is increased the
amount of rotation required to effect deformation of the lugs 60 is
reduced. In the example shown in FIG. 2, there will be four
outstruck lugs 60 and four embossments 70. As a result, rotation of
the cover 50 through a quarter turn or 90.degree. will cause each
embossment 70 to permanently deform a lug 60 and thereby establish
the desired clearance. If a single embossment 70 were to be
employed, it would be necessary to rotate that embossment through
at least 270.degree. in order for the embossment to permanently
deform all four of the lugs 60. It will also be noted that for ease
of rotation it is desirable to have all of the free ends 64 of lugs
60 directed in the same circumferential direction. In addition, it
is preferred where the number of lugs 60 equal the number of
embossments 70 to provide substantially identical circumferential
spacing for them on their respective closure assembly elements.
By way of further explanation of the characteristics of the
respective closure assembly elements, it will be noted that the
cover skirt 56 has a mean diameter at its lower extremity 72 which
is greater than the mean diameter of the locking member skirt 46.
Also, it will be noted that at least a major portion of the
outstruck lugs 60 will be disposed at a level higher than the outer
surface 22 of the container bead 14.
While for convenience of reference the lugs 60 have been discussed
as being defined by two generally horizontally disposed slits 62,
66 connected by vertical slit 64 and hinged to the locking element
40 by vertical hinge 68, and this is the preferred orientation of
the lugs 60, it will be appreciated that various lug configurations
and orientations may be employed effectively. For example, vertical
slit 64 could be deleted and the lug 60 could be provided with a
more triangular orientation. Similarly, embossment 70 is shown as
having a generally vertical orientation with a generally inwardly
convexly curved profile. Other proportions and configurations may
be employed in the embossment so long as it is dimensionally
suitable for effecting the desired permanent deformation of the
lugs 60.
It is preferred that the sealing member 30 be composed of a
resilient material suitable for purposes of effecting the desired
seal and permitting penetration of the needle while remaining inert
with respect to the container contents. A suitable material for
such use is rubber. The locking element 40 and cover 50 are
preferably composed of substantially rigid materials such as
aluminum and steel. While certain plastics might be employed
effectively in the cover 50, use of the same in the locking element
40 would result in the need to fracture the lug 60 as opposed to
permanently deforming the same.
Referring now to FIGS. 6 through 10 several modified structural
embodiments of this invention will be considered. In FIGS. 6 and 7
there is shown a cover cap which has a top panel 80 and an annular
depending skirt 82. The top panel 80 is provided with a generally
downwardly directed hollow depression 84 which defines upwardly
open recess 86. In the form shown, the depression 84 is provided
with a generally circular configuration and is generally centrally
disposed with respect to top panel 80.
Another feature of the cover member shown in FIGS. 6 and 7 is that
the lower terminus of skirt 82 is provided with a hollow inwardly
projecting, substantially continuous annular bead 90 which serves
to provide increased rigidity for the cover skirt and facilities
improved retention in the closure assembly when it is sealed to a
container.
It is also noted that the embossment 94 shown in FIGS. 6 and 7 is
generally similar to embossment 70 shown in FIGS. 2 and 5. The
embossment 70 extends over at least a major portion of the skirt
section disposed between the hollow bead 90 and the top panel 80.
The skirt portions disposed between the circumferentially spaced
embossments 94 are preferably substantially straight as viewed in
vertical section, as is shown in the righthand portion of FIG.
7.
Referring now to FIG. 10, the locking element shown therein is
generally similar to that shown in FIGS. 3 and 4. The locking
element has a top panel 104 and a depending skirt 106 and is
generally proportioned the same as that shown in FIG. 4. The lugs
100 are substantially horizontally oriented and are defined by
substantially horizontal lanced lines 102. The lugs 100 each have a
lower edge 110 which projects radially outwardly. This lug
structure is preferred as it provides improved cover cap retention
as a result of the lower edge 110 of the lugs 100 engaging the
lower portion of cover skirt 82 such as the curled bead 90 of the
cover cap. As a result it resists relative axial separation of the
cover and locking element until radially inwardly directed
deformation of the lugs 100 has been effected.
Referring now to FIGS. 8 and 9 there is shown a closure assembly
secured to neck 112 of a bottle. The closure assembly consists of a
stopper element 114, a locking element 116 and a cover 118. The
locking element 116 and cover 118 are of the type shown in FIGS. 10
and 7, respectively. The stopper element 114 has a substantially
flat upper surface 122, a pair of depending legs 126, 128. The legs
126, 128 cooperate with the stopper upper portion 130 to define a
downwardly open recess 132.
The depression 84 serves a double purpose in the closure assembly.
First of all, as is shown in FIG. 8, it distorts upper surface 122
of the stopper 114 and urges the same resiliently downwardly. This
establishes a positive upwardly directed resiliently maintained
force upon top panel 80 of the cover 118. As a result, when
relative rotation is established between the locking element 116
and the cover 118 to radially inwardly deform lugs 100 the
resilient action of the deformed stopper upper section 130 tends to
separate the cover 118 from the remainder of the closure assembly.
This facilitates removal of the obstructing cover and permits
access to the stopper member 114 by means of a syringe (not shown).
In addition, the presence of this resiliently downwardly directed
displacement of the stopper member upper portion 130 prevents
effective replacement of the cover 118 on the container after
deformation of the lugs 100, as the stopper 114 will tend to
displace the cover member 118 upwardly and resist seating of the
cover member 118 in its original position.
It will, therefore, be appreciated that the sterile container
assembly of this invention provides for effective maintenance of
the sterile environment during storage while providing definite
physical evidence of tampering without the need to exert sufficient
opening force to fracture a portion of the closure assembly. In
addition, the closure assembly is adapted to be readily opened
while held in one hand without the use of any substantial amount of
force, while preserving sufficient resistance to opening to clearly
indicate whether there has been a prior use of the container. Also,
the closure assembly of this invention is adapted to be employed
with conventional glass and sealing equipment, while remaining
economical to manufacture.
Whereas particular embodiments of the invention have been described
above for purposes of illustration, it will be evident to those
skilled in the art that numerous variations of the details may be
made without departing from the invention as defined in the
appended claims.
* * * * *