Bottles and jars – Closures – Self-sealing – piercable-type closure
Patent
1997-07-14
1998-11-10
Cronin, Stephen K.
Bottles and jars
Closures
Self-sealing, piercable-type closure
215307, 215354, 2203661, 220785, B65D 5116
Patent
active
058330887
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a container with closure cap for filling with liquids without gas bubbles. The invention relates in particular to a closure cap by means of which containers can be filled with liquids without gas bubbles.
For numerous applications it is necessary to transfer liquids into containers in such a way that no residual air or gas is included. Such a requirement applies, for example, to containers for pharmaceutical solutions which are used in certain inhalers which meter liquids by means of a measuring chamber (cf. for example WO 91/14468, see FIG. 1). Since the liquid to be metered in this case frequently contains highly effective pharmaceutical substances which have to be accurately metered, the range of fluctuations in the dosage administered must be as small as possible; otherwise, the patient will not receive the quantity of active substance prescribed by the doctor. In view of the tiny amount of liquid administered per dose, even relatively small bubbles lead to high percentage deviations in the above-mentioned inhalers.
The invention now relates to a container and more particularly to a closure cap and a process for filling containers without gas bubbles. The closure cap is constructed so that, when placed on the neck of the container, it displaces some of the contents of the container and at the same time allows any gas enclosed therein to escape and engages in the closure position. The closure may contain means for guiding a cannula for removing liquid from the container.
FIG. 1 shows an axial section through the centre of a closure cap of this kind.
FIG. 2 shows, again in axial section, the neck of a container with the closure cap according to the invention fitted thereon in the closure position, the vents being arranged differently.
FIG. 3 shows the embodiment according to the invention, wherein the vents (at least one) are provided in the form of recesses on the upper part of the container.
FIG. 3a shows an enlarged view of the embodiment according to the invention.
FIG. 4 shows the container according to the invention with the closure cap fitted thereon.
FIG. 5 shows a closure cap according to the invention with guide means for the cannula for removing the liquid.
In FIG. 1, the flexible closure cap (1) has a device (2)--in this case in the form of a dipping nozzle--through which some of the contents of the container (3) are displaced during the closure process. An inner encircling bead (4) (crimped edge) on the lower rim of the closure cap (1) engages in the closure position below a cylindrical ring (5) running around the outside of the neck of the container. Whilst the closure cap (1) is being pushed on, the rim of the closure cap expands and the bead (4) abuts on the ring (5) to form a seal, so that the only communication between the interior (7) of the cap and the exterior is through one or more vents (6). In the closure position the gap between the flat part of the closure cap (1) and the upper edge of the neck of the container, which may optionally be provided with an encircling rib (8) to improve the seal, is filled by a sealing ring (9) and in this way the interior of the container (3) is reliably sealed off from the interior (7) of the cap, which surrounds the sealing ring (9) and the neck of the container (3). The internal diameter of the sealing ring (9) is preferably selected so that it fits tightly against the device (2). The vent or vents (6) may also be located at other points on the exterior of the cap, possibly on the side, in the cylindrical part of the cap.
FIG. 2 shows the neck of the container with the closure cap (1) fitted thereon in the closure position. However, in this case, venting is achieved by the fact that vents (6) in the form of recesses are provided in the encircling bead (4) of the closure cap (1). Alternatively, recesses in the ring (5) may also serve as venting means (see FIG. 3). The dipping nozzle (2) is sealed off by a membrane (10) at the lower end. In order to remove liquid, the membrane is pierced with a cannula.
FIG. 3 shows, again
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Bachtler Wulf
Eicher Joachim
Freund Bernhard
Jaeger Joachim
Kladders Heinrich
Boehringer Ingelheim KG
Cronin Stephen K.
Devlin Mary-Ellen
Newhouse Nathan
Raymond Robert P.
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