JPS6020609Y2 - Sealed paper container with easy-open mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sealed paper container with an easy-ovenable mechanism.

A water-resistant paper container whose inside is coated or laminated with a thermoplastic synthetic resin film is filled with a liquid beverage such as milk, soy milk, coffee, alcohol, etc., and a lid member is attached to the upper end of the mouth of the container. Sealed paper containers made by heat-sealing are known.

In order to consume the beverage in the container, it is necessary to push the straw through the container from above the lid member with great force, or to separate a portion of the lid member from the upper end surface of the mouth edge of the container.

However, when sticking a straw into a lid member, if the lid member is thick and has high mechanical strength, the straw will not penetrate the lid member.
There were times when it would break.

Furthermore, when part of the lid member is peeled off from the upper end surface of the container mouth edge, it is extremely difficult to grasp the lid member, and even if the outer periphery of the lid member can be grasped to some extent, the heat sealing strength is high. It was possible to peel off at least a portion of the lid member from the upper end surface of the mouth edge simply by tearing off the outer peripheral edge piece held by fingers.

Therefore, an object of the present invention is to provide a sealed paper container having a structure that allows an opening to be easily opened for ingesting the contents.

The present invention will be explained in more detail below with reference to the drawings.

FIG. 1 is a plan view of a body member blanked from paperboard for constructing a container body of a sealed container according to the present invention.

FIG. 2 is a perspective view of the paper container body assembled from the body member.

FIG. 3 is a sectional view of the sealed paper container according to the present invention in which a suitable lid member is heat-sealed to the upper end surface of the mouth edge of the container after filling the paper container body with contents such as a beverage. be.

FIG. 4 is a perspective view showing the sealed paper container according to the present invention with an opening.

In order to manufacture the sealed paper container according to the present invention, two score lines having a predetermined interval and length must be made from the upper edge of the container body member blank toward the lower edge.

The location on the upper edge where the score line should be placed is not an absolute requirement for the present invention.

Figure 1 shows a cut line 5 of an appropriate length parallel to the right side edge 4 from the upper edge 2 to the lower edge 3, and a cut line 5 on the left side edge, in order to form a nipple piece for opening an opening in the side seam of the container. 6 shows a truncated cone-shaped paper container body member blank 1 in which cut lines 5 of appropriate lengths are arranged parallel to the truncated conical shape.

The length of the cut line 5 provided may be any length as long as it can function as a nipple piece for opening the opening.

The length of the score line 5 also varies depending on the size of the container to be formed.

When assembling a shell member blank having two score lines on the upper edge using a conventional cup forming machine, the conventional method involves winding the blank around a mandrel and performing side seams.
A curling process is performed to form the mouth edge, but
In the present invention, the nipple piece for opening the opening must be bent toward the outside of the container before the curling process.

The thus bent piece remains unrolled during the curling process.

The joining of the members to the bottom plate member (not shown) is accomplished by conventional assembly operations.

To manufacture the container according to the invention, it is preferable to blank the body and base members from paperboard coated or laminated with a thermoplastic synthetic resin film (for example polyethylene) on at least one side.

Furthermore, it is desirable to assemble the body member and the bottom plate member so that the thermoplastic synthetic resin film layer is exposed on the inside of the container.

It is also possible to assemble the container by blanking the body and base members from paperboard coated or laminated with a thermoplastic synthetic resin film on both sides.

When the upper edge of the container body is curled using a conventional cup forming machine, the brim formed has an arc shape.

Therefore, when the lid member is heat-sealed to the upper end of the brim, sufficient sealing strength may not be obtained because the contact area between the lid member and the upper end surface of the brim is too small.

Therefore, in order to obtain high sealing strength, it is preferable to reshape the arcuate brim into a flat brim.

To make an arcuate brim into a flat brim, Japanese Patent Application Laid-open No. 1983
It is possible to effectively utilize the shape-retaining effect of paper shaping by micro-vibration of ultrasonic waves and fusion solidification of a thermoplastic synthetic resin film layer as disclosed in Japanese Patent No. 7638.

FIG. 2 shows a container body 10 manufactured as described above, in which the upper surface of the container mouth rim 7 is formed flat and a nipple piece 9 for opening an opening is present at the upper end portion of the body side seam 8.
shows.

FIG. 3 shows that after filling the container body 10 with a desired liquid content 11, a lid member 12 is heat-sealed to the flat upper surface of the mouth edge 7 of the container body, thereby completing the sealed container according to the present invention. FIG.

The lid member 12 only needs to have a structure that allows it to be heat-sealed to the flat surface of the flat brim of the container body.

Therefore, the bottom layer is a thermoplastic resin film 13 coated or laminated on the inner wall of the container body and a heat-sealable thermoplastic synthetic resin film, and in addition, aluminum foil, paper, synthetic paper, or other types of A lid member having a multilayer structure in which synthetic resin films or the like 14 are laminated can be used.

To open the opening for ingesting the contents of the container, the nipple piece may be pinched between the fingers and, while holding the body of the container with one hand, the nipple piece and the lid member are torn off.

In order to improve the tearability of the nipple piece, it is preferable to provide a cut-off notch as shown in FIG. 2 at the boundary between the nipple piece and the flat brim.

If you tear off the nipple piece along with the lid member as described above, the fourth
As shown in the figure, an opening 18 for taking in the contents of the container can be very easily formed in a part of the lid member.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a body member blanked from paperboard for constructing a container body of a sealed container according to the present invention. FIG. 2 is a perspective view of the paper container body assembled from the body member. FIG. 3 is a sectional view of the sealed paper container according to the present invention in which a suitable lid member is heat-sealed to the upper end surface of the mouth edge of the container after filling the paper container body with contents such as a beverage. be. FIG. 4 is a perspective view showing the sealed paper container according to the present invention with an opening. 1... Body member blank, 2... Upper edge,
3...lower edge, 4...right edge, 5...
... Cut line, 6 ... Left edge, 7 ...
Mouth rim, tail...Side seam, 9...Nipple piece, 10...Container body, 11...
・Filled contents, 12... Lid member, 13...
...Thermoplastic synthetic resin film layer, 14...
Aluminum foil layer, 15...Paper layer, 16...Thermoplastic synthetic resin film layer, 7...
...cutting notch, 18...opening.

Claims (1)

[Scope of utility model registration request] There is a nipple piece 9 that has been cut out from the lid member 12 and the paper container body 10 and that has not been caught in at least a portion of the mouth edge 7 of the container body when forming the mouth edge. provides an easy ovenable mechanism characterized in that when the container body 10 is sealed with the lid member 12, an opening can be opened in a part of the lid member by tearing off the nipple piece together with the lid member. A sealed paper container with