U.S. patent number 3,717,274 [Application Number 05/073,298] was granted by the patent office on 1973-02-20 for container with lid for liquids.
This patent grant is currently assigned to Sprinter Pack AB. Invention is credited to Uno Wingardh.
United States Patent |
3,717,274 |
Wingardh |
February 20, 1973 |
CONTAINER WITH LID FOR LIQUIDS
Abstract
A liquid container, particularly containing carbonized drinks,
comprising a conical thin-walled plastic container with a bottom
formed substantially as part of a sphere having its central portion
selectively deformable, and a plane metal sheet lid secured by a
folded edge or seal to the edge of the container and provided with
a tear-away tongue to provide a pouring opening when tearing off
the tongue.
Inventors: |
Wingardh; Uno (Morarp,
SW) |
Assignee: |
Sprinter Pack AB (Halmstad,
SW)
|
Family
ID: |
20297421 |
Appl.
No.: |
05/073,298 |
Filed: |
September 18, 1970 |
Foreign Application Priority Data
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|
|
|
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Sep 30, 1969 [SW] |
|
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13453/69 |
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Current U.S.
Class: |
215/373; 220/611;
215/DIG.7; 220/619 |
Current CPC
Class: |
B65D
15/18 (20130101); B65D 17/4012 (20180101); B65D
77/0486 (20130101); Y10S 215/07 (20130101) |
Current International
Class: |
B65D
77/04 (20060101); B65d 023/00 () |
Field of
Search: |
;215/1C,42 ;150/.5
;220/66,67,54,63 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Hall; George T.
Claims
What I claim is:
1. A container assembly for carbonated beverages comprising:
A thin walled plastic cup-like portion having a conically tapered
side wall open at its upper wide end and integrally joined to a
hemispherical shaped thin walled closure portion to define a convex
outer surface at its bottom narrow end;
the upper end of said side wall having a continuous edge extending
outwardly and downwardly from the upper end thereof to form a
sealing lip;
a flat circular shaped metallic cover positioned upon said upper
end and having its marginal portion folded over and around said
sealing lip to provide an air-tightly sealed container
assembly;
said cover having a tear-away tongue portion for forming an outlet
for the container assembly when the tongue is removed;
a gripping ring secured to the tongue portion of said cover to
facilitate removal of said tongue portion;
said hemispherical closure portion having a circular shaped
deformation surrounding a center portion of said closure
portion;
said center portion being collapsible either prior to closure of
the container assembly or subsequent to the opening of said
container assembly to form a concave outer surface enabling said
circular shaped deformation to serve as a surface for supporting
said container assembly;
said center portion being further deformable upon closure of said
container assembly to bulge outwardly and collectively define said
convex outer surface with the remainder of the hemispherical
closure portion surrounding said circular shaped deformation to
provide increased volume for the carbonated contents when the
container assembly is filled and sealed to reduce the gas pressure
in said assembly.
2. The container assembly of claim 1 wherein the upper end of said
side wall is abruptly enlarged just below said lip to form an
annular collar for supporting said cup-like portion during filling
or use.
Description
The present invention relates to a liquid container which is
provided with a lid, and is primarily intended for carbonized
drinks such as beer or the like.
Such a liquid container shall, to the greatest possible extent,
fulfill a number of desiderata with regard to manufacturing,
filling, sealing, transporting, storing, use and destruction. The
question of costs is, in all these cases, a decisive factor.
According to the invention, the desiderata in question could be
fulfilled to a high degree with a liquid container which is
characterized by a thin-walled plastic container conically tapered
at its bottom end which, when the container is filled, constitutes
a part of an essentially spherical surface, and an essentially
plane metal sheet lid being secured at the edge of the container's
open end by means of a folded edge or seam, and provided with a
tear-away tongue or the like to form an outlet opening in the lid
after the tongue has been torn away.
The invention is based on the principle that by using a special
selection of known per se details in the large number of already
known liquid containers, a new and satisfactory liquid container
can be obtained less expensively.
Making of the thin-walled plastic container does not give rise to
any difficulties, because it can be effected with conventional heat
forming methods to form plastic foils. The container consists
preferably of PVC which can possible be coated with PVdC to
increase, in a known way, the barrier properties of the plastic and
thereby prevent pressure gas from diffusing through the plastic
wall of the container. The conical containers are stacked fitting
into each other and are delivered first for filling with a liquid,
such as carbonized drink, and then for affixing of the lid. This
procedure can take place e.g. in a brewery.
Breweries already have machines for affixing metal sheet lids on
tin cans. Thus, in order to seal the containers according to the
present invention, simple supports in the shape of vertical
supporting sleeves are all that is needed to support the plastic
containers during filling and to absorb the forces exerted when the
lid is set on and sealed. The metal sheet lid is preferably in the
standard design used in cans for beer and similar drinks.
During transport, the filled containers can preferably lie in
cartons. The metal sheet lid assumes a position whereby it stands
on edge thus forming a rigid element which can absorb considerable
compressive forces that can arise when a large number of cartons
with filled containers are stacked on top of each other.
If so desired, each container can be detachably placed in a
drinking cup into which the drink in the container can be poured
after the container has been opened. This drinking cup forms a
protection for the container during the container's transportation
and storage.
The plastic wall of the container is so thin that after the
container has been emptied, it can be easily crushed by hand to a
relatively small object which takes up little space in waste paper
baskets, garbage bags, or the like. Because the container has such
a thin wall, only a small amount of plastic is used. This results
in a decrease of the amount of harmful substances formed when the
used container is burned, e.g. in a garbage incinerator.
These and other characteristic details and advantages of the
present invention are explained further with reference to an
enclosed drawing illustrating a preferred embodiment of a liquid
holding container according to the invention.
FIG. 1 shows partly in section a container according to the
invention filled with liquid.
FIG. 2 is a view from above showing a lid with the tear-away
tongue.
FIG. 3 is an enlarged section of the edge part of the container in
FIG. 1.
FIG. 4 schematically shows a container according to the invention
placed in a drinking cup.
The liquid holding container consists of the container itself 10
and an essentially plane lid 11 made of aluminum sheet. The sheet
lid 11 is of the standard design used in e.g. beer cans and is
provided with a fracturable impression which demarcates a tongue 12
indicated by broken lines. A ring 13 is fastened at the inner end
of the tongue 12. By bending up the ring 13 and pulling it inwards,
the tongue is torn away in such a manner that an outlet is formed
in the lid.
The lid is secured at the edge of the container 10 by means of
folding 14 in the manner shown in FIG. 3.
In the vicinity of the lid, the container has an annular collar
with a supporting surface 15 facing from the lid. This collar has
served as a support against a supporting sleeve 16 in which the
container rests while being filled with liquid, and while the lid
is sealed to the container's edge. The supporting sleeve is
indicated by the broken lines in FIG. 3. This collar can also serve
as a support to bear against the edge of a drinking cup 17 in which
the container can be placed in the manner shown schematically in
FIG. 4 where the container does not, however, have any collar but
is instead provided with an edge flange as support.
As is evident from FIG. 1, the container tapers conically at its
bottom end 18 in order to facilitate the stacking of the containers
inside of each other during the conveying to the filling station.
The thickness of the wall is made as little as possible and has
about the same wall thickness common for plastic foil drinking cups
which are designed to be used only once. However, the thickness of
the wall in the container according to the invention may
advantageously be considerably smaller.
To reduce the deformation of the container during the influence of
the inner overpressure present in carbonized drinks, it is
preferable to make the bottom end 19 of the container so that it
assumes a semi-spherical shape as shown in FIG. 1, or with another
cupped shape constituting a part of an essentially spherical
surface.
In certain applications the container may advantageously be
provided with a substantially flat or concave bottom portion as
indicated by curved dotted lines 20 in FIG. 1. This concave bottom
portion has an outer edge which is defined by a small permanent
deformation 20a in the wall of the container and which forms a
circular ring concentric with the center axis of the container. The
concave bottom portion 20 is thus accurately defined and may
readily be pressed to bulge outwardly to the shape shown in solid
lines in FIG. 1 when the container is sealed and the gas pressure
is acting on the bottom portion 20. If the gas pressure for some
reason should sink below its predetermined value, this will enable
the bottom portion 20 to be pressed inwardly as an indication of
the low gas pressure in the container. In some instances, the
bottom will automatically return to this shape. Thus it will be
possible, for instance after some time of storing the container, to
check in a simple manner whether the gas pressure in the container
is satisfactory. When the container has been opened by tearing off
the tongue 12, the convex bottom portion 20 may be returned to its
original concave shape for placing the container in a standing
position on a flat horizontal supporting surface which is indicated
by a straight dotted line in FIG. 1. When the bottom portion 20 is
slightly pressed against the flat supporting surface, the convex
bottom portion 20 will snap over to form the concave bottom portion
20.
Due to the fact that the bottom portion 20 is concave upon filling
the container with a carbonized liquid and will expand to the
convex form not until the container has been sealed with the lid,
an increase of the volume of the container will be obtained after
its sealing. This is of particular importance in connection with
the filling which may be carried out so that the liquid level will
lie adjacent the upper edge of the container to obtain a small free
space between the liquid level and the lid when sealed. Thus there
will be a little amount of air enclosed in the container. This air
may alternatively be removed by conventional methods. However,
there is also a desire to have a sufficiently free space for
receiving some of the gas contained in the liquid. This required
free space will be obtained automatically when the lid has been
sealed, because the gas pressure will press out the bottom portion
20 to its convex form, thereby increasing the volume of the
container and the free space above the liquid level. This increased
space will reduce the gas pressure in the container and thus the
gas pressure load on the walls of the container.
* * * * *