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Патент USA US2136287

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Nov. 8, 1938.
Filed July 6, 1957
Patented Nov. 8, 1938
Niels Jorgen Oluf Jensen Ebbedal, Copenhagen,
Application July 6, 1937, Serial No. 152,242
In Denmark July 9, 1936
1 Claim.
' The present invention relates to an apparatus
for closing a bottle or similar container with a
capsule of metal foil or the like, shaped as a cyl
inder closed at top, such as particularly used for
closing milk bottles by means of a thin aluminium
capsule, the lower part of which is jammed or
pressed ?rmly into an annular groove in the neck
of the bottle, or below a ?ange on the same by a
pressure exerted against the capsule by a so
e\li) called closing head.
Various constructions of such so-called closing
heads are known. One of these heads consists of
a caoutchouc ring which, in that its outer part is
pinched between two metal rings parallel to the
caoutchouc ring bulges inward in such a manner
that the diameter of the opening of the caou
tchouc ring is decreased, and the latter is thereby
caused to press the cylindrical capsule flange in
ward from all sides against the bottle neck. This
20 device, however, causes the caoutchouc ring to
slide against the ?ange of the closing capsule
and, thereby there is produced a rather heavy
wear on the caoutchouc ring and, besides, a cer
tain loosening of the capsule ?xed on the bottle,
25 when the stress in the outer part of the caou
tchouc ring is caused to cease, and the ring, con
sequently, assumes its original shape. By another
known closing-head, the attachment of the cap
sule to the bottle neck is effected by means of
30 ?rm non-resilient jaws pressed from the outside
against the bottle neck, and by still another clos
ing-head the capsule is attached by means of an
annular helical spring which is caused to roll
down over the bottle neck with the capsule in
35 position. Finally, there are various hydraulically
acting closing-heads by means of which the at
tachment of the capsule is effected in that a
membrane laid down over the ?ange of the cap
sule is pressed against the bottle neck by means
40 of water pressure.
Finally a closing head is known to be used for
(Cl. 226—85)
press the peripheral part of the blank ?rmly
against the sperical part of the bottle neck.
According to the present invention the appa
ratus for tightly attaching the capsule on the
bottle neck consists mainly of a caoutchouc body 5
held only along its periphery in an annular holder
and characterized in that it consists of a pref
erably circular disc, the thickness of which is con
siderable as compared with its diameter, and pro
vided at its underside, in known manner, with a 1‘()
central recess for receiving the free end of the
bottle neck and the capsule placed thereon. By
a suitable shaping and dimensioning of such a
caoutchouc disc, the elastic deformation, to which
it is exposed by being arched upward in conse- 15
quence of the bottle neck with the capsule in
position thereon being pressed up into the said
recess and somewhat higher, will have for its
effect that the ?ange of the capsule reaching
down over the bottle neck will be pressed ?rmly, 20
from all sides, towards the neck and into the
groove in the same, or below the ?ange thereof,
without any appreciable sliding motion taking
place between the caoutchouc disc and the cap
sule, so that only a slight wear will take place.
Further, no loosening of the capsule will take
place after it has been pressed into position,
owing to the caoutchouc body being caused to as—
sume its normal shape after having pressed the
capsule into position.
In the case of bottles having a larger neck diam
eter, it may be suitable or necessary to place in
known manner a metallic disc at the bottom of the
recess, in order to prevent the capsule from being
pressed into the bottle in cases in which the cen- 35
tral part of the caoutchouc disc has a tendency to
bend itself inward owing to the stresses to which
it is exposed.
The present apparatus may also be used in cases
when the capsules are not ?nished, i. e. have no 40
?ange bent down, but are directed to the closing
attaching a paper lid or cover on the spherical
machine as ?at blanks. The latter must then be'
open end of a bottle neck, the blank used for this
held in position above the bottle mouth, 1. e. they
purpose being provided with an adhesive along
45 the periphery of its underside. In this arrange
ment a thin membrane made from caoutchouc is
pressed down over the paper blank, when placed
in position on the end of the bottle neck after
moistening of the adhesive on the underside of
50 the blank. By the said operation the blank is
?rmly attached to the bottle neck. The caou
tchouc membrane used in such a device must, of
course, be very thin relatively to its diameter, as,
must be supported against lateral motions during
during the operation, its outer part must be bent
55 downwards for rather a long distance in order to
the forming and closing. For this purpose there 45
may be used in known manner a piston having a
shaft on its top side, which piston is brought into
contact with the top side of the blank. A central
hole for this shaft must then be provided in the
caoutchouc disc, in such a manner that the holder 50
piston can move upward simultaneously with the
The accompanying drawing illustrates a few
constructions of the invention as mentioned
Figs. 1 and 2 showing the most common con
struction, in diametrical section, before the bot
tle has yet been raised toward the caoutchouc
disc and, respectively, during the closing process
Fig. 3 showing a construction of the caoutch
ouc disc with a metal plate inserted therein, and
Figs. 4 and 5 similarly in diametrical section,
showing a construction with a holder piston for
the capsules, before the bottle has yet been raised
towards the caoutchouc disc and, respectively,
during the closing process.
In the construction shown, the caoutchouc
disc I, which is supposed to be circular, is insert
15 ed, along its periphery, in a holder consisting of
two annular members 2 and 3 which for instance,
as shown, may be screwed together.
The caou~
tchouc disc has, on its bottom face, an upward
recess 4 corresponding to the neck of the bottle
5 shown below with the capsule 6 loosely applied.
It is seen that care is taken to give the caou
tchouc disc a su?icient freedom to move upward,
as it is not ?xed or clasped along is periphery,
but is inserted in a groove 1, the height of which
at the inner face of the holder ring 3 is some
what greater than the thickness of the caou
tioned metallic disc l0 inserted at the bottom of
the recess 4, and Figs. 4 and 5 show the holder
piston II with the shaft l2 belonging thereto
and passing up through a central hole in the
caoutchouc disc, which arrangement is used in
the case of non-?nished capsules being applied
to the bottle, i. e. only the stamped blanks I3
serving to form the capsules. The ?anges on the
capsules will then be formed in that the blank is
pressed up into the recess 4 and, at the same 10
time, the capsule will be pressed ?rmly on to the
It is not a condition for a reliable action of
the apparatus that the thickness of the caou
tchouc disc is diminished towards its periphery, 15
as shown.
Having now particularly described and ascer
tained the nature of my invention and in what
manner the same is to be performed I declare
that what I claim is:—
In an apparatus for ?xing sealing capsules
over container necks, the combination of a resil
ient gripping block having a considerable thick
ness compared with its super?cial area and cylin
drically recessed on its underface to receive the 25
in the capsule material at a certain distance from
container neck and the capsule-closure supported
thereon, with a rigid holder provided at its inside
with a groove loosely retaining the edge of the
block therein, and the diameter of the recess be
ing small relative to the diameter of the block, 30
whereby the said holder will arch freely when
pressed onto the container and the walls of the
recess will be contracted by said arching move
ment to force the capsule skirt against the ex
one another, as known from any bottle closed
in this manner. Fig. 3 shows the above men
terior on the container neck.
tchouc disc at the corresponding point. Fig. 2
shows how the caoutchouc disc arches upward
owing to the pressure exerted from below against
30 the same by the bottle, and how the edge 8 of
the recess 4 enters into the groove 9 of the bottle
neck and, thereby, presses the capsule perfectly
?rmly into this groove, small folds being formed
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