JPH0156964B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for packaging butter, margarine, etc. in containers using a multilayer container.

(Prior Art) Generally, a multilayer container used as a container for butter, etc. consists of three layers: plastic/paper/plastic.

Of both the inner and outer plastic layers, the outer plastic layer is designed to prevent the paper layer from coming into contact with the inner surfaces of other containers when the containers are stacked, thereby preventing germs from adhering thereto.

This is because paper contains many bacteria, and if the contents are filled with the bacteria still attached to the inner surface of the container, the contents may spoil.

In the conventional packaging method, a multilayer container as described above is first completed, and then the container is filled with contents such as butter, sealed, and packaged.

(Problems to be Solved by the Invention) For this reason, in the conventional method, it is necessary to prevent contamination of the inner surface during container manufacturing, or to prevent contamination during transportation when the container needs to be transported, or to prevent the contents from entering the container. Many points had to be paid attention to, including how to handle the product when filling and sealing it.

(Means for Solving the Problems) The present invention has been made in view of the above points, and instead of filling the multilayer container with the contents after completing the multilayer container, the outer container is filled with the contents in an aseptic environment. After filling the inner container, which is molded separately, with butter or other contents and sealing it, the sterilized and sealed contents are loaded into the outer container, and the inner container and the outer container are joined at the flange to form a multi-layered container. By forming the container into a container, then covering it with a lid and packaging it, sanitary precautions in filling and packaging the contents are reduced and the work is simplified.

(Example) Hereinafter, an apparatus for carrying out the method of the present invention will be described with reference to the drawings.

First, the multilayer container used in the present invention will be explained.

The multilayer container is composed of an outer container and an inner container, and FIG. 1 shows an embodiment of the multilayer container together with a lid.

FIG. 2 is an enlarged view of the multilayer container. Reference numeral 1 denotes an outer container, which is made of, for example, a laminate of polypropylene 1a and polystyrene 1b.

A flange 1d is formed at the opening of the outer container 1, and a step 1c is formed next to the flange 1d.

2 is an inner container made of polypropylene.

The inner container 2 is formed with a stepped portion 2c and a flange 2d so as to fit with the outer container 1.

3 is a paper body interposed between the outer container 1 and the inner container 2.

Further, although the inner container 2 needs to be an integrally molded product made of plastic, the outer container does not necessarily have to be made of plastic and may be made of paper.

Reference numeral 4 denotes a lid, which is made of polyethylene terephthalate, for example, and has an engaging portion 4a that engages with the flanges 1d and 2d of the inner container 2 and outer container 1.

There are two embodiments of the packaging method of the present invention using the multilayer container as described above, as described below.

FIG. 3 is an explanatory diagram of the first embodiment of the method of the present invention, and also shows an outline of the apparatus used therein.

Reference numeral 5 denotes a winding film for an outer container, and the film F fed out from this is molded into the outer container 1 in a forming section 6.

For forming, use hot plate forming, pressure forming, or vacuum forming.

When the outer container 1 formed into the film F is conveyed together with the film F and comes under the paper hopper 7,
The paper body 3 is supplied by a suction and reversal type supply device 8 .

Next, the outer container 1 supplied with the paper material 3 is loaded with the inner container 2 at the inner container loading section 9 .

Although not shown, the inner container 2 is formed in advance in a sterile environment, and is already filled and sealed with contents such as butter.

The inner container 2 and the outer container 1 are joined together by sealing their flanges 2d and 1d using a flange sealing device to form a multilayer container.

The heater 10 of the flange seal device moves up and down, and 10a is a receiving part that moves up and down opposite to this. Note that ultrasonic waves can also be used for sealing.

The inner container 2 and the outer container 1, which have become a multilayer container with the flanges 2d and 1d sealed, are then conveyed to a trimming device 11, where trimming is performed from around the sealed flanges.

The trimming device 11 uses a die set to cut the outer container 1.

The multilayer container with the outer container 1 cut off falls and passes to the suction receiving device 12 waiting below.

On the other hand, the dust film F′ with the container cut out is
It is wound onto the dust reel 13.

The multilayer container is conveyed from the suction receiving device 12 by a bucket conveyor 14, and the lid body 4 is supplied from a hopper 15 by a lid supply device 16, pressed onto the multilayer container, and then discharged from a discharge device 17 to a conveyor 18.

FIG. 4 is an explanatory diagram of a second embodiment of the method of the present invention, and also shows an outline of the apparatus used therein.

In this embodiment, the outer container 1 and the paper body 3 are integrally molded in advance.

1 is the outer container, which is formed integrally with the paper body 3 in advance.

The outer container 1 is connected to the supply device 2 from its hopper 19.
0 onto the bucket conveyor 21.

The outer container 1 conveyed by the bucket conveyor 21 is then loaded with an inner container 22 in the inner container loading section 9 as in the first embodiment. As in the first embodiment, the inner container 2 is already filled with contents and sealed.

Next, the flange is sealed by the heater 10 and the receiving part 10a in the flange sealing device, and the outer container 1 and the inner container 2, which have become a multilayer container, are lifted by the guide plate 22 and covered with the lid 4 in the lifted state. , and then discharged onto the conveyor 18 by the discharge device 17.

In this embodiment, the number of steps is reduced by the outer container forming step and the trimming step, compared to the first embodiment.

(Effects of the Invention) In the method of the present invention, an inner container that is molded in a sterile environment separately from an outer container is filled with contents such as butter and sealed, and then the sterilized and sealed contents are transferred to the outer container. After loading, the inner container and outer container are joined at the flange to form a multilayer container, and then a lid is placed on this, so when packaging butter, etc. in a container, the filling process with butter, etc. is easy. It is hygienic because it is separated from the molding of the outer container, and the work can be simplified compared to conventional methods.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an example of a multilayer container together with its lid, Fig. 2 is a partially enlarged view thereof, Fig. 3 is an explanatory diagram of the first embodiment of the method of the present invention, and Fig. 4 is the same as above. It is an explanatory view of a second example. 1...Outer container, 2...Inner container, 3...Paper body, 4
... Lid body, 6 ... Molding section, 9 ... Inner container loading section.

Claims (1)

[Claims] 1. Fill the inner container, which is formed separately from the outer container, with butter or other contents in a sterile environment and seal it, then load the sterile and sealed inner container into the outer container, and then separate the inner container and the outer container. A method for packaging butter, etc. in a container, characterized in that the containers are joined at their flange portions to form a multilayer container, and then a lid is placed on the container.