U.S. patent number 3,794,200 [Application Number 05/274,988] was granted by the patent office on 1974-02-26 for safety closure and package.
This patent grant is currently assigned to Anchor Cap & Closure Corporation of Canada, Limited. Invention is credited to Walter J. Marks.
United States Patent |
3,794,200 |
Marks |
February 26, 1974 |
**Please see images for:
( Certificate of Correction ) ** |
SAFETY CLOSURE AND PACKAGE
Abstract
A safety closure is described for use in sealing glass or
similar containers and which may be used as a regular easily
removed twist-on twist-off closure or, alternatively, at the option
of the user as a locked safety closure for preventing removal of
the closure cap be children. The container and the closure cap have
cooperating lugs which engage in the usual manner for permitting
the closure cap to be used in an unlocked or freely removable
manner. A sealing bead is included in the cap for sealing the
package in the unlocked use. A pair of cap engaging grooves are
provided on the container finish in addition to the cap lugs for
engaging the sealing bead and the cap lugs in the locked position
and which act to prevent removal of the cap by children.
Inventors: |
Marks; Walter J. (Mississauga,
Ontario, CA) |
Assignee: |
Anchor Cap & Closure
Corporation of Canada, Limited (Toronto, Ontario, CA)
|
Family
ID: |
4090439 |
Appl.
No.: |
05/274,988 |
Filed: |
July 25, 1972 |
Foreign Application Priority Data
Current U.S.
Class: |
215/201; 215/330;
215/318; 215/344; 215/44; 215/45 |
Current CPC
Class: |
B65D
41/0471 (20130101); B65D 50/06 (20130101) |
Current International
Class: |
B65D
41/04 (20060101); B65D 50/06 (20060101); B65D
50/00 (20060101); A61j 001/00 (); B65d
055/02 () |
Field of
Search: |
;215/9,31,40,41,44 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Hall; George T.
Claims
Having thus described my invention, I claim:
1. A safety closure comprising the combination of a cap shell
having a cover and a depending skirt, container engaging lugs
projecting inwardly from the lower edge of the cap skirt, and an
inwardly projecting sealing bead positioned on the cap skirt
intermediate to and spaced from the cap cover and said lugs and
adapted for alternatively engaging the container rim at vertically
spaced positions.
2. The closure as claimed in claim 1 in which said first position
is on an outwardly and upwardly facing portion of said rim and said
lower position is at an outwardly and downwardly facing portion of
said rim.
3. The closure as claimed in claim 1 which further comprises a
sealing gasket on the underside of said closure cap cover spaced
from said sealing bead.
4. The closure as claimed in claim 1 which further comprises a
resilient sealing gasket ring positioned at said sealing bead.
5. The closure as claimed in claim 1 in which said sealing bead
comprises a plurality of sealing rings each having a pointed edge
for engaging the container.
6. The closure as claimed in claim 3 in which said gasket comprises
a resilient disc.
7. The closure as claimed in claim 3 in which said gasket comprises
a resilient ring.
8. The closure as claimed in claim 3 in which said gasket comprises
a flowed-in plastisol material.
9. The closure as claimed in claim 1 in which said sealing bead
comprises a plurality of spaced arcuate sections.
10. The closure as claimed in claim 1 in which said cap shell
comprises an outer metal shell and an inner plastic insert with
said sealing bead and said lugs being formed on said insert.
11. The closure as claimed in claim 1 in which said cap shell
comprises an outer metal shell and an inner plastic insert with
said sealing bead being formed on said plastic insert and said lugs
being formed on said metal shell.
12. A safety package comprising a container sealed with a closure
cap, said container having a plurality of cap engaging lugs
positioned below the container rim, a circular groove adjacent the
container rim above said lugs, said closure cap having a cap shell
with a cover and a depending skirt, container engaging lugs on said
cap skirt for engaging said container lugs, an inwardly directed
sealing bead on said cap skirt positioned intermediate of and
spaced from said cap lugs and said cover for engaging the container
rim above said groove when the cap and container lugs are engaged
and for engaging the container groove when said cap lugs are moved
below said container lugs.
13. The package as claimed in claim 12 in which said container lugs
have lower bead portions which cooperate to form an interrupted
bead around the container, the bead interruptions forming passages
for the closure cap lugs when the lugs are moved below said
container lugs.
14. The package as claimed in claim 12 in which said container lugs
have an inclined lug camming surface on their tops.
15. The package as claimed in claim 12 which further comprises a
sealing gasket on the underside of said closure cap.
16. The package as claimed in claim 12 which further comprises a
resilient sealing gasket ring positioned at said sealing bead.
17. The package as claimed in claim 12 in which said sealing bead
comprises a plurality of sealing rings each having a pointed edge
for engaging the container.
18. The package as claimed in claim 15 in which said gasket
comprises a resilient disc.
19. The package as claimed in claim 15 in which said gasket
comprises a resilient ring.
20. The package as claimed in claim 15 in which said gasket
comprises a flowed-in plastisol material.
21. The package as claimed in claim 13 in which said cap shell
comprises an outer metal shell and an inner plastic insert with
said sealing bead and said lugs being formed on said insert.
22. The closure as claimed in claim 13 in which said cap shell
comprises an outer metal shell and an inner plastic insert with
said sealing bead being formed on said plastic insert and said lugs
being formed on said metal shell.
23. An improved finish for the container of a safety package
comprising the combination of a circular groove at the container
rim, a plurality of cap engaging lugs below said groove, said lugs
having an elongated bead on their leading edge, said beads
combining to form an interrupted bead around the container with the
interruptions proportioned to pass the cap lugs to a position below
the interrupted bead.
24. The finish as claimed in claim 23 which further comprises an
inclined camming surface on the lug tops.
Description
BACKGROUND OF THE INVENTION
The present invention relates to a closure cap and sealed package
and more particularly to a safety closure cap which may be used
alternatively at the option of the user as a regular twist-on
twist-off closure or as a locked safety closure which prevents the
package from being opened by children as well as other persons
unfamiliar with proper removal technique.
A variety of safety closures have been designed for medicines or
other potentially dangerous products which prevent their being
opened by small children. These prior designs have, in some cases,
been relatively complex requiring additional elements or moving
parts on the closures and in other cases they have been
satisfactory from a sealing standpoint when used in an unlocked
manner without the use of the safety feature. Another problem in
connection with these prior safety closures has been the relative
complexity of the finish required on the glass or other container.
Thus, while there is a demonstrated need for such safety closures
which has engaged the attention of manufacturers and the general
public and the government, there has been no widespread adoption of
such packages.
The closure cap and package, in accordance with the present
invention, overcomes these objections and thereby makes the use of
such a safety closure economical and practical. The closure cap, in
accordance with the present invention, may be applied in its
unlocked position by the original packer with a satisfactory seal
permitting the package to be distributed for use as a regular
package. The consumer may continue to use the package in this
manner or he may optionally apply the closure cap in its locked
position preventing its casual removal by children or unauthorized
persons.
A further alternative permits the original packer to apply the cap,
if desired, in its locked or safety position. These results are
obtained using a unitary cap which may be formed as a unitary
molded article and with a container finish of relatively simple
form which may be provided on glass or other containers by
conventional forming machinery.
Accordingly, an object of the present invention is to provide
improved safety closures.
Another object of the present invention is to provide an improved
closure cap which may be alternatively used as a conventional screw
cap or as a safety cap.
Another object of the present invention is to provide a safety-type
closure cap which is readily formed by conventional cap molding or
other forming techniques.
Another object of the present invention is to provide a safety
closure cap having an effective seal in regular use as an unlocked
screw cap as well as in its locked or safety position.
Another object of the present invention is to provide an improved
safety package having a relatively simple glass finish capable of
being formed on conventional container molding or other forming
machinery.
Other and further objects of the invention will be obvious upon an
understanding of the illustrative embodiment about to be described
or will be indicated in the appended claims and various advantages
not referred to herein will occur to one skilled in the art upon
employment of the invention in practice.
BRIEF DESCRIPTION OF THE DRAWING
A preferred embodiment of the invention has been chosen for
purposes of illustration and description and is shown in the
accompanying drawings, forming a part of the specification,
wherein:
FIG. 1 is an exploded perspective illustrating the closure cap and
glass finish in accordance with the present invention.
FIGS. 2 and 3 are vertical sectional views of the package in
accordance with the invention illustrating the cap applied in its
regular and in its safety or locked position respectively.
FIGS. 4, 5 and 6 are vertical sectional views of additional
embodiments of the closure cap in accordance with the present
invention.
FIG. 7 is a horizontal sectional view of another embodiment of the
closure cap.
FIG. 8 is a vertical sectional view of another embodiment of the
closure cap having a metal outer cover with plastic
container-engaging lugs.
FIG. 9 is a bottom plan view of the closure cap of FIG. 8.
FIG. 10 is a vertical sectional view of another embodiment of the
closure cap having a metal outer cover with metal lugs.
FIG. 11 is a bottom plan view of the closure cap of FIG. 10.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A preferred embodiment of the safety cap and package will first be
described with particular reference to FIGS. 1, 2 and 3.
FIG. 1 is a perspective view showing the preferred embodiment of
the container 1 finish and a preferred embodiment of the safety
closure 2 for use on that finish.
The preferred glass finish is seen to include spaced cap engaging
lugs 3 having a rounded generally downwardly facing camming surface
4 for engaging the cap 2 lugs 5. The lugs 3 terminate in an
inclined stop surface 6. An opposite side of each lug 3 is provided
with a generally upwardly facing inclined cam-off surface 7 to
assist in the removal of the closure cap 2.
In order to provide the safety feature, as will be more fully
described below, the lower portions of the lugs 3 comprise
elongated beads or extensions 8 which cooperate to form an
interrupted bead around the container glass finish. The openings 9
between beads 8 are seen to be positioned immediately beneath the
cap lugs 5 when the cap lugs 5 are in their closed position with
the cap 2 applied in its unlocked or normal position as seen in
FIG. 2. The container 1 has a rounded rim 10 above a shallow groove
11.
The preferred embodiment of the closure cap 2 is seen to comprise a
unitary molded article having a cover 12 and a depending skirt 13
with the spaced container engaging lugs 5 extending inwardly from
the lower edge of the cap skirt 13. The cap skirt 13 is seen to
have an inwardly directed sealing bead 14 spaced downwardly from
the under surface of the cap cover 12 and positioned to form a seal
with the rounded rim 10 of the container 1 when the cap 2 is in its
normal and unlocked position as illustrated in FIG. 2. In this
position, the three cap lugs 5 are each positioned against a stop
surface 6 of one of the three cap engaging lugs 3 on the container
1.
The above described container 1 finish and closure 2 also provide
the safety or locking capability which will now be described with
particular reference to FIGS. 2 and 3.
When the cap 2 is in its unlocked position as shown in FIG. 2, it
is seen that it may be pressed directly downwardly to its locked
position as each of the three lugs 5 passes through an opening 9
between beads 8 and as the sealing bead 14 on the cap skirt 13 is
forced over the rounded and projecting edge of the container rim
10. When the cap 2 is thus pressed downwardly to the position
illustrated in FIG. 3, each of the cap lugs 5 will be positioned in
a groove 15 formed between the beads 8 and the upper portion 16 of
the container body 17 and the sealing bead 14 will be contained in
the groove 11 below the container rim 10.
It is now clear that an attempt to remove the closure cap 2 by
rotation merely causes the lugs 5 to turn in the container groove
15 without any lifting effect and also causes the sealing bead 14
to turn in the groove 11 on the container finish. The tight fit
between the closure sealing bead 14 and the container finish groove
11 will resist any upward movement of the closure. This fit may be
made relatively tight so that adult finger strength is required to
move the sealing bead 14 over the container rim 10 after the
closure lugs 5 have been aligned with the openings 9 between the
beads 8 on the glass finish.
It is thus seen that the closure cap 2 may be used in a normal
twist-on twist-off and unlocked manner when no precautions are
required in connection with the packaged article. In this use of
the closure cap 2, as illustrated in FIG. 1, the cap 2 is dropped
over the glass finish and is rotated approximately 120.degree. to
its closed position with the closure cap lugs 5 engaging the stop
surfaces 6 on the glass lugs 3 and with a tight seal being formed
between the cap bead 14 and the container rim 10. Should it be
desired to deny access to the container to children or other
persons, the cap 2 is pressed down to the position of FIG. 3 where
it will freely rotate but where it may not be removed without
precise positioning of the cap lugs 5 and without a firm vertical
pull which a child cannot perform. Cooperating index marks 18 and
19 may be provided to show when the cap lugs 5 are in their release
positions permitting the cap 2 to be pulled upwardly to its
unlocked position.
FIG. 4 illustrates the closure cap 2 and the container 1 finish, as
described above, with a sealing gasket 20 provided in the closure
cap 2 where a relatively air-tight seal is desired in the locked
position. This use of the gasket 20 in the closure cap provides for
an extremely tight seal for the locked container where the product
may be shipped or carried in the locked position and where the
package should be tightly sealed to protect its contents against
deterioration over longer periods. The gasket 20 illustrated in
FIG. 4 is in the form of a disc which may be precut or flowed in. A
ring gasket which is precut or flowed in may also be used.
FIG. 5 illustrates a container 1 having the glass finish of the
type described above and a closure cap 21 generally similar to that
described above. An additional gasket 22 is mounted on the sealing
bead 23. The gasket 22 is seen to form a portion of a cone so that
it may be resiliently held in place in a cooperating and generally
similarly shaped slot 24 provided in the cap skirt 25. This gasket
22 may be used with or without a secondary gasket on the cap top
such as the ring gasket 26 illustrated.
FIG. 6 illustrates another embodiment of a closure cap of the
general type described above. This closure cap 30 has rib-like
sealing rings having a generally pointed cross-section, as
illustrated, where a first series of sealing rings 31 provide an
initial seal on the container rim 10 in the unlocked mode and where
additional sealing rings 32 provide a tight seal in the safety or
locked position when the cap is pressed downwardly.
While the sealing beads 14 or 23 or 31 on the closure cap may
extend completely around the inner surface of the cap skirt, FIG. 7
illustrates at 33 an alternative embodiment of the cap where a
sealing bead is formed in a number of spaced sections 34 providing
openings 35 between the sections 34. This provides a relatively
flexible sealing bead even when stiffer cap materials are used. The
widths of the openings 35 may be chosen as an additional control of
the lifting force required for the removal of the cap 33 from its
locked or safety position.
FIGS. 8 and 9 illustrate another embodiment where the closure cap
40 has an outer metal shell 41 and a molded inner plastic insert
42. The plastic insert 42 may be preformed and inserted into the
metal shell 41. The inner shape of the plastic insert 42 may take
the forms of those as described above. The embodiments of the
plastic insert and the glass finish on the container 1 illustrated
in FIGS. 8 and 9 corresponds to that illustrated in FIGS. 1, 2 and
3 including a sealing bead 43 and lugs 44.
FIGS. 10 and 11 illustrate a still further embodiment of the
closure cap where the cap 46 has an outer metal shell 47 which
includes inwardly formed container engaging lugs 48 which operate
in the same manner as the plastic lugs 5 described for the
embodiment of FIGS. 1, 2 and 3. The plastic insert 49 includes a
sealing bead 50 to engage the container 1 rim 10 in the manner
already described.
It will be seen that an improved and relatively simple safety
closure has been provided. The closure and finish permit a normal
unlocked sealing mode or a locked safety mode at the option of the
packer as well as the consumer. Effective seals are provided for
both positions to provide a relatively air-tight package. The
improved designs of the closure cap and of the glass finish are
readily incorporated in closure caps and container finishes formed
on conventional closure and package forming machinery. The package
may therefore be supplied as a relatively inexpensive item making
the safety features of the package available for a wide variety of
uses.
As various changes may be made in the form, construction and
arrangement of the parts herein without departing from the spirit
and scope of the invention and without sacrificing any of its
advantages, it is to be understood that all matter herein is to be
interpreted as illustrative and not in a limiting sense.
* * * * *