JPS638579Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a simple opening container sealed with a lid made of a composite sheet containing metal foil such as aluminum foil or a single layer sheet. To provide an easy-to-open container that can be opened easily without making scores or cuts in the lid or using an opening tool.

[Conventional technology]

Currently, the lids of cans of powdered milk etc. contain 0.2 to 0.35
0.11~0.18mm for aluminum material with a thickness of about mm
A hollow rivet is formed in a part of the lid, a tab for opening the can is caulked to the rivet, and the score line is broken and removed by the lever action of the tab. The format is used.

Another type of lid is one made of metal foil, a synthetic resin sheet, or a composite sheet of these, which is formed to fit over the mouth of the container, and then wrapped or welded with a metal or plastic ring. There is something.

Furthermore, there is a simple opening container as shown in FIG. 1, which was proposed by the present applicant in Utility Application No. 56-63779.

This was developed to solve the problems of aluminum powder contamination, safety, impact resistance, and economy of the first score type lid, and the complicated opening operation of the second type lid. It is something.

[Problems to be solved by the invention] However, the simple opening container proposed in Utility Model Application No. 56-63779 has the following drawbacks. That is, if explained using FIG. 1 and the reference numerals in the figure, the opening tension piece 7
If the pulling direction of the grip part 1 provided at the starting end of the opening is inappropriate, or if there is defective adhesion on the inner guide edge 6, the tearing that guides the inner guide edge 6 may not be smooth. In this case, since the lid 2 does not have enough bending, the stress of tearing along the opening edge 5 is dispersed, and the opening edge 5 and the opening tension piece are 7, the tear is made, and the lid 2 is attached to the opening edge 5 at about 180° from the initial opening, as shown by the imaginary line.
There were cases where uncut parts were left behind.

[Means to try to solve problems]

The structure of the present invention that solves the problems of the conventional technology is as follows:
A lid made of a composite sheet containing metal foil or a single layer sheet of metal foil is wrapped or fused around the mouth edge of the can body together with a ring made of metal or plastic, and on the top surface of the lid, A simple opening container in which an opening tension piece having a grip portion at one end is welded or glued to be stronger than the tear strength of the lid, and the lid is opened by pulling up the opening tension piece with the inner edge of the ring as the opening edge. wherein the opening tension piece is constituted by a spiral strip of at least one circumference and a quarter along the entire circumference of the opening edge of the ring, and has the gripping portion at the inner starting end of the strip;
In addition, at the outer end of the strip, a protrusion toward the opening edge of the ring is provided on the outer edge of the inner strip near the end at a position opposite to the outer end. , the outer circumferential edge of the opening tension piece and the opening edge of the ring are substantially equally spaced apart.

[Effect]

The present invention adopts such a configuration, so that when the opening tension piece is pulled up and the tearing of the lid progresses and reaches the opening edge of the lid, sufficient deflection has occurred, so that all the stress is concentrated on this opening edge. As the tear progresses, a complete opening with no uncut parts can be obtained.

〔Example〕

To explain the details of the embodiment with reference to FIG. 2, 1
Reference numeral 1 denotes a lid that is integrally wound around the upper opening of a can body (not shown) with a metal ring 13 having an opening edge 12. The present invention relates to an improvement of this lid 11.

This lid 11 is formed of a composite sheet in which a thermoplastic synthetic resin layer is laminated on the upper surface of aluminum foil. The opening tension piece 14, which is a spiral band-shaped piece having a double structure, is placed at approximately equal intervals between the outer peripheral edge 14a of the opening tension piece 14 and the opening edge 12 of the ring 13, with respect to the upper surface of the lid 11, The lid 11 is fused or bonded with an adhesive to be stronger than the tear strength of the lid 11. Note that the opening tension piece 14 does not need to be made of the same type of composite sheet as the lid 11, and may be made of any material having a strength slightly higher than the tear strength or tensile strength of the lid. Further, although the lid is made of a composite sheet, it may be made of a single layer or multiple layers as required.

Furthermore, if the opening tension piece 14 is longer than one circumference and a quarter, it will be effective in removing uncut parts, but preferably by making it longer than one and a half circumferences, the uncut parts, especially around 180° from the opening start end, can be completely removed. It will be resolved in

In this embodiment, the open tension piece 14 having a spiral structure is
As shown in the figure, since it is configured in a spiral shape with approximately one turn and three quarters of a turn, the band-like piece on the opposite side of the starting end 14b, that is, around 180 degrees, has double inner and outer sides. Further, a lid 11 is provided at the inner starting end portion 14b.
A grip portion 15 that is weakly adhered or not adhered to the upper surface is continuously provided, and the spiral end portion 14c has an outer edge of the inner opening tension piece 14d adjacent to the end portion 14c. A protrusion 16 facing toward the opening edge 12 of the ring 13 is formed on the ring 13 . In the figure, 17 is an inner opening tension piece 14
18 is the inner guide edge of the outer opening tension piece 14e, 19 is the inner and outer opening tension piece 14d,
14e, and is a connecting piece that can be easily cut. The number of turns of the opening tension piece 14 may be double or triple, and 20 in the figure is the boundary line between the grip portion 15 and the starting end 14b of the opening tension piece 14.

Next, explaining the opening process, when the grip part 15 is pulled up in the usual manner, the inner opening tension piece 14d is torn along the inner guide edge 17, and the outer opening tension piece 14e is torn along the inner guide edge 18. are proceeding at the same time. If the grip part 15 is still pulled up, the inner guide edge 1 of the inner opening tension piece 14d
7, the tearing process is interrupted when the tearing progresses to about half the circumference because the lid 11 bends. Therefore, the outer opening tension piece 14e
Only the tearing along the inner guiding edge 18 of the ring 13 is sustained, and this tearing passes from the outer end 14c through the projection 16 to the opening edge 12 of the ring 13, and at this point it continues at the same time on the inner guiding edge 17. Since there is no rough tearing, all the stress is transferred to this opening edge 1.
2, the tearing of the lid continues smoothly along this opening edge 12 until the end, and a complete opening can be achieved.

In addition, during the above opening process, if the pulling direction of the grip part 15 provided on the opening tension piece 14 is inappropriate, or if there is a defect in adhesion on the inner guide edge 17, the outer opening tension piece 14e inner guide edge 18
In many cases, uncut parts of the lid 11 are left behind, but 2
In the second tearing, the ring 13 is completely removed together with the outer opening tension piece 14e.
A complete opening with no uncut edges can be obtained.

[Effect of the invention] As described above, according to the present invention, the tearing guided by the inner guide edge 17 of the inner opening tension piece configured in a spiral shape is interrupted, so that the stress is transferred to the inner guide edge 17 of the outer opening tension piece. 18, the tear along this inner guide edge 18 causes sufficient deflection of the lid, and the tear along the inner guide edge 18 passes through the protrusion 16 to the opening edge 12 of the ring, absorbing all the stress. Since this concentrates on the opening edge 12, a complete opening with no uncut edges can be achieved, which has great practical effects.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a prior example, and FIG. 2 is a plan view of the present invention. DESCRIPTION OF SYMBOLS 11... Lid, 12... Opening edge, 13... Ring, 14... Opening tension piece, 14a... Outer peripheral edge, 1
4b...Inner starting end, 14c...Outer ending end, 1
4d...Inner opening tension piece, 14e...Outer opening tension piece, 15...Gripping part, 16...Protrusion part, 17,
18...Inner guide edge, 19...Connecting piece.

Claims (1)

[Claims for Utility Model Registration] (1) A lid made of a composite sheet containing metal foil or a single layer sheet of metal foil is wrapped around the mouth edge of a can body together with a ring made of metal or plastic, or , an open tension piece having a grip at one end is welded or adhered to the upper surface of the lid with a strength stronger than the tear strength of the lid, and the inner edge of the ring is pulled up by pulling up the opening tension piece. In the simple opening container in which the lid is opened as the opening edge, the opening tension piece is constituted by a spiral strip of at least one circumference and a quarter along the entire circumference of the opening edge of the ring, and The inner starting end has the above-mentioned gripping part, and at the outer end of the strip, a protrusion toward the opening edge of the ring is provided on the outer edge of the inner strip near the terminal end. 1. A simple opening container, characterized in that the outer peripheral edge of the opening tension piece and the opening edge of the ring are substantially equally spaced apart from each other. (2) The easy-to-open container according to claim 1, wherein the gripping portion is temporarily fixed to the lid so that it can be easily peeled off.