DE2004745A1 - Sealed plastic liquid container - Google Patents

Description

PATENT LAWYERS

dr. W.Schalk dipl.-ing. P. Wirth dipl.-ing. G. Dannenberg

DR.V. SCHMIED-KOWARZIK DR. P. WEINHOLD DR. D, GüDEL

6 FRANKFURT AM MAIN

C *. ItCHENHIlMm ITRA (II 1 »

2nd February 1970 There is

Baxter Laboratories, Ino,

6301 Lincoln Avenue Morton Grove, Illinois, USA

Sealed plastic liquid container

Sealed plastic container for! Liquids can be prepared, filled and sealed by the application of heat, so that the content is in a einstüokig sealed bottle or a container which only the like can be opened characterized in that the wall of the container is torn open. The container is usually manufactured by extruding a tube made of molten thermoplastic or resin into a mold and inflating it with air. While the container is kept in the inflated state, a precisely measured amount of liquid is poured into the container, causing the part of the container that comes into contact with the liquid to solidify

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remains in a liquid or soft state after filling in the liquid. A second shape is then made around the open, unsealed end closed around such a sealed neck and head part of the container in a one-piece design with its smart part. The finished product is therefore a plastic container filled with liquid or a plastic bottle in which the amount of liquid is sealed

It is desirable to have such plastic containers for storage and dispensing parenteral solutions to use blood and other sterile substances for which the dispensing is accurate measured amounts is typical, especially because the liquid contents are sterile until the plastic container is torn can be kept and also because the plastic container is cheap and can be thrown away after use.

It is also desirable to accommodate liquids of the type mentioned in collapsible or flat plastic containers, so that the container collapses when the liquid is removed. This allows you to start a higher degree Maintain the sterility of the liquid, since no access of air is required for emptying or for easier emptying which usually contains impurities.

However, there is a problem here in obtaining a suitable aid for the purpose of removing the liquid allows access to the plastic container · This would require the plastic wall of the container in a controlled manner and are torn while maintaining sterility. The invention is therefore based on the object of providing a suitable aid for the sterile removal of the liquid content a sealed plastic container to hold In addition, the invention makes it possible in such

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Plastic containers have the property of collapsing too improve so that the liquid can be easily drained from the container without the need for ventilation were.

The invention relates to a collapsible container in which a liquid is accommodated and the main part of which is made of flexible plastic like a hose. This main part is closed and sealed at one end and narrows at the other end to form a one-piece neck part turn in one piece from the same material art λ a head portion provided, which seals the container. The invention is characterized in that the container has a tubular recess at one of its ends, preferably on the head part, _{which can accommodate a suitable piercing tool, for example a puncturing needle or the} like, for piercing the container and removing the liquid. The recess is delimited by a tubular side wall and a bottom wall, the latter serving as a pierceable membrane through which the needle can be inserted into the liquid. The recess preferably contains a plastic sleeve or the like "pipe socket as a guide for the needle to be inserted"

Next is the hose-like main part of a container of the invention formed with sufficiently thin% ndungen that it has a practically flat shape without liquid and is in a flaccid state «, about the collapse of the tube-like main part when liquid is withdrawn To promote further, the container preferably has a substantially oval cross-section when it is in its, through the liquid content is expanded state · Furthermore, a container according to the invention is preferably on a its ends are provided with a hanger that connects to the container at a single point via a narrowed neck part

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connected is.

An embodiment of the invention is described in more detail below with reference to the drawing, namely show:

Fig. 1 is a plan view of a container according to the invention, partially in section, and with a liquid such as a parenteral solution or the like. filled;

FIG. 2 shows a section along the line 2-2 of FIG. 1;

Fig. 3 is a partial section along line 3-3 of the Pig. 1; and

Fig. 4 is a partial view of the container according to FIG. 1, but compared to FIG. 1 by 90 by Rotated longitudinal axis to the hanger used on this container according to the invention demonstrate.

The drawing shows a sealed, collapsible, liquid-filled container 10 according to the invention, The Container 10 has a tube-shaped main part 12 made of flexible plastic, which seals at one end 14 is. At the same end 14, a hanger 16 is formed in one piece with the main part 1 2 and duroh with this a narrow neck part 18 is connected, which is much more aohmal than the hanger 16, as Fig. 4 clearly shows The hanger 16 is connected to the main part 12 at only one point or one connection point. This results when emptying the Container 10, when it is suspended from the hanger 16, the Advantage that it collapses more easily because the part adjacent to the end of the container is essentially one konisohen shape can coincide, the only vertex at the junction 20 of the shark parts 16 with the

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_ 5 -

Container end 14 is. In this way you will be "on leakage." the liquid brought the walls of the main part 12 closer together than the sail would be if a hanger was attached two places would be connected to the container, as is the case with a misshapen hanger of the pail.

At its other end, the sole tube-shaped main part narrows 12 aich in one piece to a neck part 22, which in turn is in one piece merges into a head part 24. The head part 24 is closed for sealing the container 10. So that is Liquid content 26 'completely in a one-piece art * fabric wall included.

Fig. 2 shows the preferred embodiment of the container with oval cross-section when filled. However, the container is not self-supporting, but falls to a limp, essentially flat shape when not held in its flared, oval shape by the liquid contents will. This oval shape makes it easier to collapse into an essentially flat structure and thus a more extensive one Removal of the liquid content only by the action of gravity, without mechanical aids.

Pig. 3 shows two tubular depressions 26 in the head part 24, the length and width of which is chosen so that a puncturing needle or a similar piercing tool can be received and held therein in order to remove the liquid. Each of the recesses 26 can have any cross-section, although a circular cross-section is shown in the exemplary embodiment. The depressions 26 are formed with a bottom wall 28 which is pierced when the puncturing needle, for example, is inserted into the container. Preferably a beveled needle with a non-axial point is used. When inserting the needle into the recess 26

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it breaks through the bottom wall 28 on their with ease Periphery 29 and peels off the bottom wall 28 around the periphery 29 as it penetrates further.

Each of the recesses 26 may suitably contain a tubular sleeve 30 which serves as a guide for the needle for piercing the bottom wall 28 is used. The sleeve 30 can be inserted into the recess 26 after the container 10 has been pulled and sealed inserted and glued. The bore of the sleeve 30 is preferably dimensioned so that the removal of the Liquid-serving needle fits in tightly and a nucleation of liquid when inverting the container 10 to remove the content is avoided.

In order to keep the wells 26 and sleeves 30 sterile, a conventional closure, such as a (not shown) Rubber cap, to be placed on each sleeve 30. Preferably, two sleeves 30 and recesses 26 are provided to on the one hand to be able to empty the contents of the container and on the other hand to have the possibility of removing the liquid in the container to add any necessary medication or to connect several containers in series one behind the other so that a larger amount of liquid can be withdrawn without interruption, for example administered to a patient.

It therefore needs, according to the invention, to remove the contents of the container Only a needle can be inserted through a sleeve 30 until the bottom wall 28 tears or is pierced. Until then, the interior of the container 10 remains sterile because it is completely sealed off on the outside. After the entrance of one sterile needle, which fits into the sleeve 30, the container is always essentially sealed, eo that contamination can barely penetrate

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The tubular recesses 26 described can also be used with plastic containers with circular or other non-oval cross-sections and of course with other devices for hanging up the container.

Like Pig. 1 shows, the part of the container 10 adjacent to the head part 24 has a substantially conical shape due to it the gradual decrease in cross-section in the direction of the head part 24 ", this prevents when the tank is filled and vice versa Container exhibits excessive bulging due to stretching due to the weight of the fluid contents. “Such stretching could to form undesirable shoulder bags in the Y / and surrounding the neck part 18 and thus to hold back any accumulated there Lead liquid parts "

The Y / and the container 10 need not necessarily of uniform thickness to its example, a container 10 having an oval cross-section of the oval, the wall parts in the manufacture of a blank having a uniform wall thickness in the Uähe of the ends to be thinner than the wall parts in the vicinity of the sides .

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Claims (7)

There / is ϊ February 2, 1970 Baxter Laboratories, Ine, Patent claims: Collapsible container made of flexible plastic that is sealed and contains a liquid, the Container is in the form of a tube sealed at one end and narrowed at the other end Has neck part which merges in one piece into a head part for closing the container, characterized in that that at one (24) of the two ends of the container (10) a suitable for receiving a piercing tool, according to inwardly directed tubular recess (26) is provided. 2. Container according to claim 1, characterized in that the recess (26) is provided in the head part (24). 3. Container according to claim 1 or 2, characterized in that a pipe socket (30) is inserted into the recess (26) is. 4. Container naoh one of the preceding claims, characterized in that the container (10) of oval cross-section and at its end opposite the head part (24) is formed in one piece with a hanger (16) which only has a sohmaleren shark part (18) connected at one point to the container. 5. Container naoh one of the preceding Aneprüohe, characterized in that more than one recess (26) is provided on the head part (24) of the container, each containing a pipe socket (30). 009840/1216 6. Collapsible, liquid-containing, sealed container made of thin-walled, flexible plastic tubing; in particular according to one of the preceding claims, wherein the sole lies essentially flat, if it does not contain any liquid and is sealed at both ends when filled, characterized in that, that a hanger (16) is provided in one piece with the container at one end (H) and at only one point (20) is connected to the container (10) via a narrowed neck part (18). 7. Container according to claim 6, characterized in that the plastic tube (12) has an oval cross-section. Patent attorney: 009840/1216 Blank page