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Патент USA US3088626

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May 7, 1953
T. FREDA
3,088,616
SEALING JOINT FOR BOTTLE CLOSURE CAPSULES
Filed Nov. 10, 1960
A
_
INVENTOR
TULLIO FREDA
ATTORNEYS
United States Patent 0 "ice
31,088,616.
Patented May 7, 1963
1
2
3,088,616
low, reference being made to the accompanying draw
ings, in which are illustrated two forms of embodiment
of the invention which are given by way of example only
SEALING JOINT FOR BOTTLE CLOS
CAPSULES
Tullio Freda, 113 Rue Saint-Charles, Paris, France
Filed Nov. 10, 1960, Ser. No. 68,392
Claims priority, application France Nov. 13, 1959
1 Claim. (Cl. 215-40)
and not in any sense by way of implied limitation, and
in which:
FIG. 1 is a view in perspective of a joint in accordance
with the invention;
FIG. 2 illustrates a capsule fitted with the joint in ac
cordance with FIG. 1.
FIG. 3 illustrates the same capsule effecting the clo
dustrial product, a sealing joint intended to be placed in 10
sure
of a bottle; and
the bottom of a capsule for closing bottles, ?asks or like
FIG. 4 shows in cross-section a capsule ?tted with a
vessels.
joint in accordance with an alternative form.
Joints of this type have already been produced which
Reference being made to FIG. 1, it can be seen that
are constituted by a convex cup having a suitable diam
eter and placed in position in the bottom of the capsule, 15 a joint in accordance with the present invention is con
The present invention concerns, by way of a new in
the convexity of the said cup being turned towards the
exterior.
Joints of this type are usually made of a
stituted by a cup 1, the bottom of which is convex as
shown in the ?gure and which is limited by a cylindrical
wall 2. In the concave portion of the cup are set four
spurs 3 which are at a slightly oblique angle with respect
to
the axes of symmetry of the cup. In addition to the
20
advantage of being crushed at the moment of screwing
above, a certain number of spurs 4 are disposed radially
down due to the pressure applied at the neck of the bot
on the periphery of the cylindrical wall 2.
tle and that as a result, if a slight opening is accidentally
FIG. 2 illustrates the joint I mounted in a capsule 5
formed in the capsule, for example as a result of vibra
of conventional type. It can be seen that the spurs 3
tions, the sealing is no longer hermetically effected, since
into contact with the bottom 6 of the capsule.
the joint is not endowed with sufficient elasticity to revert 25 come
In FIG. 3, there has been illustrated the capsule 5 which
to its original shape. On the other hand, after opening
is screwed on the neck 7 of a bottle 8. The rim of the
and closing successively for a few times, it is also ob
neck has deformed the joint 1, which has thus caused the
served that, for the same reasons, the air-tightness is de?
spurs 3 to take up a more oblique or slanting position
cient in the case in which the bottle has not been com
such as that shown by the reference 3'. Similarly, the
moulded plastic material, such as polyethylene. It has
been observed, however, that such joints have the dis
pletely stopped.
The present invention has for its object to provide a
remedy for these drawbacks and, with this purpose in
view, is directed to a joint of the type mentioned above,
which is characterized in that said joint is provided with
means intended to restore this latter to its initial shape
after having been ?attened.
It will be understood that such means have the result
that the sealing remains hermetic even if-as is frequent
ly the case-—-the capsule moves out of its position of total
closure or even if the stopping of the bottle has not been
completely e?ected.
spurs 4 are elastically compressed against the cylindrical
wall of the capsule.
It will be understood that, if a
slight unscrewing of the capsule takes place, or if the
capsule is subsequently screwed down to an incomplete
extent, the spurs 3 and 4, by moving back to their original
position, tend to restore to the joint its original convex
shape, with the result that the said joint thus provides a
hermetic seal under all circumstances.
In FIG. 4, there can be seen a capsule 5 which is
40 identical to the previous types, and in which there is ?tted
a joint 9 having the same shape as the joint 1, but on
the concave wall of which is moulded a helicoidal spring
In a form of embodiment of the invention to which it
10 applied against the bottom 6 of said capsule. It is
would appear necessary to give preference, the means in
obvious that the spring 10 plays a part similar to that
tended to restore the capsule to its original shape are con
of the spurs 3 which have been described above.
stituted by spurs set on the concave face at an oblique 45
The present invention is any case in no way limited
angle so as to slant outwards and intended to come into
to the forms of construction which have just been de
contact with the bottom of the capsule. During the de—
scribed; on the contrary, the invention is carried into
formation of said capsule, these spurs take up positions
which are more and more oblique and have a natural
tendency, when the capsule is no longer subjected to
pressure, to revert to their initial position, thereby also
restoring the joint to its initial shape.
practical effect whenever a joint of the type which has
been illustrated comprises means for restoring the joint
elastically to its initial position after deformation of said
joint.
What I claim is:
A
seal for caps for closing the mouth of bottles, ?asks
additionally be provided for the purpose of restoring the
and the like containers, said seal comprising a deformable
joint to its original shape, in the form of a spring dis 55 convex
cup having a suitable diameter for being placed in
posed axially on the concave face and intended to be
position in the bottom of a cap, resilient spurs provided
applied against the bottom of the capsule.
on said cup which are set to slant outwards from the
In accordance with a ‘further alternative form which
concave face of said cup and which are positioned for
is preferably employed in combination with the preced
coming into contact with the bottom of said cap, and
ing forms, the means intended to restore the joint to its 60 further resilient spurs being provided on said cup extend
original shape are constituted by spurs set radially on
ing radially on the external periphery of said joint and
the external periphery of the joint and intended to come
positioned for engaging the lateral wall of said cap.
into contact with the lateral wall of the capsule. These
spurs, which are elastically compressed when the joint is
References Cited in the ?le of this patent
65
deformed, have a tendency to revert to their original
UNITED STATES PATENTS
shape and, by virtue thereof, to restore the joint also
Frydlender ___________ .... Jan. 24, 1956
2,732,089
to its original shape.
The spurs, springs or equivalent members are prefer
OTHER REFERENCES
ably moulded in one piece with the joint.
70
Germany, H 11,085, III/64a, Nov. 10, 1955.
The present invention will in any case be clearly under
Germany, M 13,948, III/64a, Oct. 25, 1956.
stood with reference to the description which follows be
In accordance with an alternative form, means can
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