JPH0439163Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pouring spout used in a sterile packaging container for accommodating liquid foods such as dairy products and juices.

[Prior Art] In recent years, a method of enclosing sterilized food in a sterilized container has been widely used as a packaging form for long-term preservation of food. For example, as shown in Figure 3, the base film (outer bag)
1 and another film (inner bag) 2 are stacked on top of each other, and the periphery 4 is sealed to form a bag-like sealed container (sterile packaging container) 5. A cylindrical spout 6 is attached to a part of the film 3, and the spout 6
A method of aseptically filling cream, juice, etc. into an aseptic packaging container having a spout and a cap 7 that closes the outer end of the container using an aseptic filling machine has been known for some time (Utility Model Application No. -117341).

However, even if the cap 7 is provided at the spout of a sterile packaging container having a spout, the fitting part is exposed to the atmosphere and is vulnerable to bacterial contamination.
Also, the cap may come off easily, so
In order to ensure that bacteria do not enter the container, as shown in Fig. 4, after pouring the contents into the container, seal the top surface of the spout 6 with a membrane (thin film) 8 before fitting the cap 7. There is a need to.

By the way, aseptic packaging containers are sterilized with gamma rays in a capped state before the contents are injected, and after the inner surface of the container is rendered sterile, the container is filled with the contents through the filling port of an aseptic filling machine. After filling, it was necessary to seal the top of the spout with a membrane and then cover it with a cap.

[Problems to be solved by the invention] The invention combines two steps into one: sealing the top surface of the spout with a membrane after filling the aseptic packaging container with the material to be contained, and then covering the container with a cap.
The aim is to simplify the filling operation by making it possible to perform it during the process.

[Means for solving the problem] The present invention uses a cap provided with a membrane coated with a pressure-sensitive adhesive that adheres to the top surface of the spout when the cap is pushed deeply into the bottom of the cap, and the contents are Before filling, cover the cap so that the membrane does not touch the top of the spout, sterilize it with gamma rays in that state, remove the cap in a sterile room, fill the contents, and push the cap firmly after filling. By doing so, the membrane is attached to the top surface of the spout at the same time as the cap is fitted to the spout.

[Function] According to the present invention, after filling, by simply pushing the cap firmly into the spout and fitting it, the two processes of adhesive sealing of the membrane to the top surface of the spout and fitting of the cap can be achieved simultaneously. can.

[Example] Fig. 1 is a sectional view of the spout for a sterile packaging container according to the present invention before the contents are accommodated, and Fig. 2 is a sectional view similar to Fig. 1 after the contents are accommodated.

In FIG. 1, the spout 9 according to the present invention has a fitting convex edge 9a on its upper edge and a similar fitting convex edge 9b slightly below it.
Near the outer end of the inner peripheral surface of the cylindrical fitting portion 10a of the cap 10 into which the cap 10 is fitted, there are fitting convex edges 9a, 9 of the spout 9.
A fitting groove 10b that can be fitted is provided in b, and a similar fitting groove 10c is further provided inside the groove 10b separated by the distance between the fitting convex edges 9a and 9b of the spout 9. There is. And cap 10
A membrane 12 coated with a pressure-sensitive adhesive 11 on the side facing the spout is attached to the bottom. As shown in the figure, the fitting groove 10b located near the tip of the cap 10 fits with the fitting convex edge 9a on the upper edge of the spout 9, which prevents bacteria from entering from the outside after sterilization. It is prevented. In this state, the membrane 12 is located away from the upper edge of the spout 9.

When pouring the container into such a sterile packaging container, the cap 10 is removed in a sterile room, the container is filled into the sterile container through the spout 9, and the cap 10 is placed again. However, in this case, the cap should be pushed down strongly so that the fitting grooves 10b and 10c of the cap fit into the fitting convex edges 9b and 9a of the spout, respectively, and the membrane 12 attached to the bottom of the cap The surface of the pressure sensitive adhesive 11 is strongly pressed against the upper end surface of the spout 9, and the cap fits onto the spout and the membrane 12 seals the spout opening at the same time.

Note that the fitting convex edge 9b provided on the spout may be omitted. As the membrane, for example, Al foil coated with a pressure-sensitive adhesive may be used.

[Effects of the invention] In this invention, the spout cap has a two-stage fitting structure, and a membrane coated with pressure-sensitive adhesive is attached to the inner surface of the cap. After fitting the cap and sterilizing the container with gamma rays to make it sterile, the cap is opened in a sterile room, the storage area is filled, and after filling, the cap is fitted and the container is fitted for a second time. The pressure at the time of fitting activates the pressure-sensitive adhesive applied to the membrane and seals the spout opening with the membrane.

Therefore, according to the present invention, it is possible to close the spout of the membrane in one step of fitting the cap into the spout, thereby simplifying the work.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of the pouring spout for a sterile packaging container according to the present invention before accommodating the contents, Figure 2 is a cross-sectional view similar to Figure 1 after accommodating the contents, and Figure 3 is a cross-sectional view of the pouring spout for a sterile packaging container according to the present invention. FIG. 4 is a cross-sectional view of a conventional example of a sterile packaging container, and FIG. 4 is a cross-sectional view of the spout portion shown in FIG. 3. 3...Package film, 5...Sterile packaging container, 9...Spout spout, 9a, 9b...Fitting convex edge, 1
0... Cap, 10a... Cylindrical fitting part, 10
b, 10c... Fitting groove, 11... Pressure sensitive adhesive,
12... Membrane.

Claims (1)

[Scope of utility model registration request] A cylindrical spout with a fitting convex edge on the outer periphery, and a two-stage fitting concave edge that fits into the fitting convex edge on the inner circumference,
A spout for a sterile packaging container, characterized in that the cap has a membrane coated with a pressure-sensitive adhesive, which is bonded to the top surface of the spout when the cap is deeply pushed in.