DE1786388A1 - Plastic bags for sterile items - Google Patents

Description

Plastic bags for sterile items

The invention relates to a new type of plastic bag and a new type of method for packaging sterile items

stands.

When packing sterile items intended for medical bandages and similar applications, the inside of the packaging and the contents of the packaging are placed in steam autoclaves or autoclaves with ethylene oxide sterilized. Are used as packaging plastic wrappings used, ethylene oxide is generally used «

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In such a packaging, the plastic sleeve must loaded, evacuated and then exposed to the sterilization gas to sterilize the contents and pouch will. In addition, the packaging should be able to be opened as easily as possible and the contents removed without Risk of contamination from touching the external, non-sterile parts of the packaging.

According to the invention, a novel bag is made from a material that has a tendency to curl, see above that the upper part of the opened bag is outward bulges, creating the possibility of touching the outer surface of the bag when removing the sterile contents the bag decreases. The top of the bag has perforations and after the bag is loaded it becomes sealed above the perforations and then the interior evacuated and then with the sterilizing Purged gas. Then the bag is sealed just below the perforations and thus the sterilized one The contents of the bag are permanently protected. The bag is through Tearing below the second seal across the film open, with Biakerbungni to facilitate tearing are appropriate

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The main purpose of the invention is to develop one novel plastic bag for holding a sterile Contents that can easily be put in and taken out of the bag.

The invention also provides a simple and economical method of packaging and sterilizing objects specified. In addition, according to the invention, the danger should be avoided contamination of removing the sterilized item from its packaging can be reduced. According to the invention a bag for sterile contents is made from a tubular, seamless plastic tube. In the end the invention teaches the use of multiple film Made of plastic for sterile packaging, which form a hole-free envelope and curl to open.

The various features of the invention are set out below outlined on the basis of an exemplary embodiment; the accompanying drawings show:

Fig. 1 is a front view of the bag according to the invention before the contents are introduced;

FIG. 2 shows a cross section through the bag according to FIG. 1,

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sectioned along the line 2-2 in Fig. 1;

3 shows a cross section through the bag according to FIG. ₉ cut along the line 3-3 in FIG. 1;

Fig. 4 is a sectional view on a larger scale of one

Cut through the plastic film for the bag Figures 1, 2 and 3;

FIG. 5 shows a cross section as in FIG. 3, after the introduction the contents and the establishment of a first seal above the perforations in the bag walls;

FIG. 6 shows a view of the first weld closure according to FIG on a larger scale;

FIG. 7 shows the bag according to FIG. 5 after flushing with sterilizing gas and the production of the second pre-welded seal below the perforations;

Fig. 8 is a front view of the bag of Fig. 7 with the Tear notches below the second closure;

FIG. 9 shows the bag according to FIG. 8 after the tears, wherein

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the bag walls are bent away from each other.

Fig. 1 shows a typical bag as it can be produced continuously from a continuously injected hose made of thermoplastic film, for example according to the procedure described in the pending US patent application 35o 22o of March 9, 1964 (inventor: HO Corbett, title: "Layered products and processes and apparatus for their manufacture"). In particular, a tube consisting of two layers 2o and 21 (FIG. 4) is produced by hose injection molding; 2o is the outer and 21 the inner tube layer, 2o can be made from heavier and 21 from lighter polyethylene. o, lo ma) lies. These . Combination of films causes the film to ^flex about the heavier layer as shown in FIG. The plastic tube from the injection molding machine can be fed to a suitable bag machine, from which ¹ angles 22 and 23 are formed into the tube (Fig. 2), and the bags are cut to length, with a lower Schwelevers chluß 24 is formed, which over the in the angles · folded bag runs. A series of perforations is then made along the upper edge of the opposing walls 26 and 27 of the laid tube;

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Figures 1 and 3 show perforations 28 in wall 26 and perforations 29 in wall 27. The upper ends of walls 26 and 27 have a tendency to roll away from each other (Figure 3); this property has previously been used to make a plastic bag that can be easily opened. The "transverse direction" of the fila is parallel to the bottom and the top of the bag; in this direction the fiIa is preferably torn.

The bag shown in FIGS. 1, 2 and 3 is provided with a » sterile object 3o loaded through its upper opening, and across the top of walls 26 and 27, above aligned perforations 28 and 29 a first heat seal 31 set (Figures 5 and 6)

\ Then the bag is placed in a suitable Sterilisierraue, which is first evacuated, in order to evacuate the bag through the openings 28 and 29, and the flushed through the same perforations 28 and 29 Xtliylenoxyd.

After sterilization of the interior of the bag and its contents to the bag is across the upper Teilcbs below or directly to the perforations 28 and 29, a second heat seal 32 vorgonoamen (Fig. 7 and 8) · When

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Production of the heat seal 31 are also the lateral notches 33 and 33, which are at the same level as one another 34 sealed to prevent foreign gases from entering the bag. The finished bag is complete sealed and secured against injuries due to the layered structure of the bag. The contents of the bag and the interior of the bag are therefore even after a very long time Storage and completely sterile despite careless handling.

To open the bag, the user simply tears the top of the bag along a line extending from the Notch 33 runs to notch 34. FIG. 9 shows how the fresh ones formed after the upper part of the bag was torn off upper edges of the bag are curved outwards and present the user with a sterile edge of the bag when that in grasping the pouch to retrieve the sterile item 3o; the danger that the user or the object touches the outer, non-sterile wall of the bag is reduced.

In the description, the preferred embodiment is the Invention explained; the possible modifications of this fora are readily familiar to the person skilled in the art. The basic ideas of the invention are defined in the claims.

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Claims (1)

L 55 345 ° September 27th 1968 Patent claims: 1. Plastic bag for sterile objects, characterized »that the bag consists of stacked first and second layers (2o _t 21) of different plastic material that it has interconnected front and rear walls (26, 27) on the sides, that a heat seal (24) runs over the bottom of the front and rear walls, which run up to an open end of the bag that openings (28) are provided on the upper edge of the front wall (26), which allow a gas flow through the front wall, if The front and rear walls above the opening (28) are welded together, and that furthermore the front and rear walls at the open end bend away from one another outwards. 2. Plastic bag according to claim 1, characterized in that the bag consists of a hose-sprayed tube 109882/0683 L 55 SAS There is plastic film and that the heat seal (24) perpendicular to the axis of the tube and parallel to the Cross direction of the pipe 3 _e plastic bag according to claim 1 or 2, characterized in that the openings are designed as a row of openings in the front wall 4. Plastic bag according to one of the preceding claims, characterized in that a second heat seal (32) below the openings over the front and the Back wall runs. 5. Plastic bag according to claim 4, characterized in that a first and a second tear notch (33, 34) are provided in the sides of the bag below the second heat seal (32). 6. A method for packaging and sterilizing objects, characterized in that an object (3o) in a plastic bag with a heat-sealed (24) -9-1O9882 / Ö $ I1 ^BAD original L 55 345 AO Near the bottom and an opening in the upper end of the bag the open end of the bag is given that then a kiss seal (31) above the opening transversely ztm Bag upper part is made that thereupon the inside of the bag is flushed with a sterile gas that flows through the opening and that a second heat seal (32) over the opposing walls of the bag and between the opening and the interior area of the bag is made. 7. The method according to claim 6, characterized in that also »tear notches (33, 34) in the bag sides cut below the second heat seal (32). 8. The method according to claim 6 or 7, characterized in that the opening consists of a plurality of perforations (28, 29), which run parallel to the first heat seal treatment (31) over the full width of the bag. -lo- BATH ORIGINAL A4 Blank page