U.S. patent number 3,872,745 [Application Number 05/475,121] was granted by the patent office on 1975-03-25 for opener tool.
This patent grant is currently assigned to Vidriera Monterrey, S.A.. Invention is credited to Roberto Cavazos Garza, John Martin.
United States Patent |
3,872,745 |
Garza , et al. |
March 25, 1975 |
OPENER TOOL
Abstract
An opening tool for use with closures of a modified crown type
is disclosed. This is a hand operated one piece tool formed of flat
stock and having a handle portion and a offset hooked end. The
hooked end engages with a substantial portion (about 30.degree.) of
the under edge of the closure while the junction of the hook and
handle portions engages the top of the closure immediately adjacent
the part engaged by the hooked portion. The handle then extends
completely across the top of the container and is fulcrumed thereon
at the junction of the hooked and handle portions.
Inventors: |
Garza; Roberto Cavazos
(Monterrey, N.L., MX), Martin; John (Monterrey, N.L.,
MX) |
Assignee: |
Vidriera Monterrey, S.A.
(Monterrey, N.L., MX)
|
Family
ID: |
23886291 |
Appl.
No.: |
05/475,121 |
Filed: |
May 31, 1974 |
Current U.S.
Class: |
81/3.55 |
Current CPC
Class: |
B67B
7/16 (20130101) |
Current International
Class: |
B67B
7/00 (20060101); B67B 7/16 (20060101); B67b
007/16 () |
Field of
Search: |
;81/3.34,3.46R,3.4,3.46A |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
143,705 |
|
Jun 1920 |
|
GB |
|
1,062,872 |
|
Dec 1953 |
|
FR |
|
Primary Examiner: Smith; Al Lawrence
Assistant Examiner: Parker, Jr.; Roscoe V.
Attorney, Agent or Firm: Kemon, Palmer & Estabrook
Claims
We claim:
1. An opening tool for closures of the general crown type
comprising:
a first elongated flat handle portion;
a second relatively short flat extension of said handle portion
extending integrally therefrom at an obtuse angle;
a third portion integral with said second and of substantially the
same width, said third portion being U-shaped in cross-section and
terminating in a relatively thin edge, the distance between said
edge and the junction of said first and second portions being such
that said edge can engage under the closure to be removed when the
said junction is positioned on the immediately adjacent portion of
the closure overlying the rim of the container, so that forcing
said flat portion down flush with the upper surface of the closure
stresses the closure in hoop tension to enlarge its internal
diameter sufficiently to permit removal by hand.
2. A tool as defined by claim 1 in which said edge portion is
substantially a section of a circle the radius of which is
substantially equal to the radius of the closures with which the
tool is to be used.
Description
BACKGROUND OF THE INVENTION
In copending application Ser. No. 475,120 filed May 31, 1974 there
is disclosed and claimed a new form of container closure
particularly suited for wide-mouth thin-walled containers such as
blow-molded glass baby food jars. In order to remove such closures
once they have been applied and without distorting the the sealing
area of the closure a special tool is required.
BRIEF SUMMARY OF THE INVENTION
The opening tool in accordance with this invention is similar in
some respects to the conventional crown closure remover tools of
the prior art. It consists of a hand-operated device having an
elongated handle portion formed of flat stock and an offset hook
portion at one end of the handle portion. The latter is of
substantial width in order to engage with perhaps 30.degree. of the
periphery of the closure and is spaced from the offset by an amount
to permit simultaneous engagement of the offset with the top of the
closure immediately adjacent that portion of the edge engaged by
the hook portion. The handle then extends completely across the top
of the container at an angle thereto and is fulcrumed on the top of
the container (through the closure). A downward force is applied to
the handle portion until it lies substantially flush with the
container top which stresses the rim of the closure in hoop
tension. By repeating at adjacent locations around the periphery,
the closure is gradually enlarged in diameter by an amount
permitting it to be manually removed but the configuration of the
sealing portion is undisturbed so that it may be replaced as a
dust-tight cover.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1 and 2 are perspective views of the tool of this
invention;
FIG. 3 shows the placement of the tool on a sealed container
preparatory to opening the container; and
FIG. 4 shows the tool in its end position after applying a downward
force from the position as shown in FIG. 3.
DETAILED DESCRIPTION OF THE DRAWINGS
In referring first to FIGS. 1 and 2 of the drawings, it will be
seen that the tool is formed of flat metal stock and includes an
elongated flat handle portion 10, and an offset portion 12 which
terminates in a hook-shaped portion 14. The point 16 of the hook 14
will be seen to comprise an elongated edge slightly curved to match
the curvature of the containers and closures with which it is to be
used. Preferably, the width of the tool is such that the edge 16
will engage with perhaps 25.degree. to 30.degree. of the periphery
of the closure.
Referring now to FIGS. 3 and 4 for a description of the operation
of the tool, FIG. 3 shows the tool applied to a container sealed
with a closure of the type disclosed and claimed in my
aforementioned application. As disclosed in that application, it is
the rim portion 18 of the closure 20 which had been reduced in
diameter during the closure applying process and which must be
increased in diameter by an equal amount before the closure 20 may
be manually removed from the container. With the tool applied to
the container enclosure as shown in FIG. 3, the hooked edge 16
engages the underside of the rim 18 of the closure 20 and that
portion of the tool which is at the juncture between the handle 10
and the offset 12 is positioned substantially in alignment with the
end of the container wall substantially immediately adjacent the
point of engagement between the edge 16 of the tool and the rim 18
of the closure. This point, therefore, forms the fulcrum for the
tool. By applying a downward force, the handle 10 may be brought
into contact with the opposite side of the closure as shown in FIG.
4 and in so doing the rim 18 is pried outwardly. By repeating this
operation at successive substantially adjacent points, the inside
diameter of the rim 18 of the closure 20 may be enlarged by a
sufficient amount to permit removal of the closure over the bead of
the container end. It should be carefully noted that this is
effected without distorting the top portion of the closure 20 which
means that the closure may be replaced on the container after
partially using the contents thereof and since it is undistorted in
its sealing area it will form at least a dust-tight seal with the
container. This is of a distinct advantage in connection with baby
foods, for example, where only a portion is used at a time and the
remainder replaced in a refrigerator until some time later in the
day. The contents is thus protected against contamination until
such time as the contents are exhausted.
* * * * *