JPS6133945A - Can-shaped vessel cover - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an easy-to-open lid for a can-like container, and more particularly to a lid for a container that can be used as various beverage cans and is intended for easy-to-open containers.

Conventionally, such container lids have been made by post-bonding aluminum foil, which has a heat-fusible resin layer on both sides, and a resin sheet that has been previously made by injection molding using an adhesive. However, this method increases the number of steps and costs, causes the molded product to peel due to heat history such as retort treatment, and decreases the drop strength of the product. There were various disadvantages such as food hygiene issues due to the use of adhesives.

The inventors of the present invention previously conducted intensive studies to obtain can lids that do not have the drawbacks of container lids obtained by conventional post-adhesion methods, and as a result of encountering numerous difficulties, the injection molding By inserting and fixing an insert made of aluminum foil as described above into the mold of the machine, injecting resin into it, and simultaneously molding (integral molding), it is possible to avoid positional displacement. Cam No. 58-90749) succeeded in obtaining a high-precision injection molded product and filed a patent application.

As a result, the number of steps is shortened, ■ the molded product has high adhesion strength, so it does not peel off during retort processing, etc., and ■ the product has high drop strength, and also has excellent food hygiene properties. I succeeded in getting the lid.

However, in this case, when using an insert material made of aluminum foil that has heat-meltable resin layers on both sides, the resin layer laminated on top of the aluminum foil, especially when opening the lid of the stipend container, is Since the handle part (pull top part) to be used is also in close contact, a problem arises in that the handle part cannot be peeled off from the lid body (insert material).

For can-like containers, it is an important issue how to provide an opening that can be easily opened. They succeeded in obtaining an easy-to-open lid for a stipend container that could be easily peeled off from the material, and filed a patent application (Japanese Patent Application No. 124756/1983).

An example of the container lid will be explained with reference to FIGS. 1 and 2. In these figures, 1 is a multilayer base material, and this multilayer base material is made of a metal impermeable to oxygen, water, etc. (hereinafter referred to as gas barrier property). A resin layer (
The base material 2 is typically made of aluminum foil, and the resin constituting the first resin layers 3 and 4 is, for example, A thermoplastic synthetic resin is used. Incidentally, FIG. 2 shows a cross section taken from FIG. 1-19.

As shown in FIG. 2, the container lid is made by laminating a resin similar to the resin of the first injection molded resin layer on the surface of the multilayer base material 1.

The resin layer (hereinafter referred to as the second resin layer) 5 laminated on the multilayer base material 1 has a handle portion (pull top portion) 6, an opening portion 7, and a cutout portion 8. It is composed of an outer peripheral part 9 completely separated from the outer peripheral part 9.

As shown in FIGS. 1 and 2, a groove 10 for opening the handle 6 is provided between the handle 6 and the opening 7, as shown in FIGS. 1 and 2.

The container lid is treated to make the handle part 6 easier to open from the multilayer base material 1.

For example, a typical example of this treatment is to apply printing ink to the surface of the multilayer substrate 1 to form a treated layer 11 as shown in FIG. 2.

The lid 12 of the stipend container thus constructed is attached to the body 13 of a can-like container, as shown in FIG. 2, and heat-sealed to form a can-like container as shown in FIG. 3. ,
They are filled with various beverages, foodstuffs, and other contents, undergo retort processing, and then served as coffee cans, canned goods, etc.

In addition, in FIG. 3, the bottom of a 14-sized can-like container is shown.

To open the lid of the container (open the can), insert your fingertip into the groove 10 of the container lid and lift the handle part 6, and the handle part 6 will be peeled off from the multilayer base material 1, as shown in FIGS. 1 and 2. Code 150 shown in
At this point, the tip of the handle part 6 is wedged inside the multilayer base material 1, the multilayer base material 1 is cut, and the handle part 6 is pulled as it is.
The multilayer substrate 1 is cut into the notch 8, and the package is opened (
Can opening) will be held. Figure 4 shows a plan view of the lid of the stipend container after opening, and Figure 5 shows a sectional view taken along the line 1-11 in Figure 4. can be done.

As mentioned above, the lid of the stipend container is provided with a treated layer 11 by printing or the like for the purpose of making the multilayer base material of the handle part 6 easy to open, and the opening part 7 and the opening part 7 are provided so that the handle part 6 can be easily opened. A notch 8 is provided to completely separate the outer circumferential portion 9.

The present invention was developed as part of such easy-open technology, and aims to provide an easy-to-open stipend container lid.

By the way, various designs are possible for the handle.
There are various types.

The handle part 6 shown in FIG. 1 above has a design in which a circular recess 17 is provided inside the peripheral wall 16 of the handle part 6, as shown in the same figure. The handle part 1 is designed so that the inside of the peripheral wall 12 formed in the shape of a pool is formed into a wavy shape with peaks (protrusions) 20 and troughs 21 (recesses) like a screw. Furthermore, Figure 7 is the same as Figure 6 1.
A sectional view of the main part taken along line -1 is shown.

The present inventors were studying the ease of opening of such a handle part 18, and removed a part of the peripheral wall 19,
Both ends of the mountain portion 20 in the direction perpendicular to the can opening direction,
It was found that by forming the mountain portion by extending it to the top of the peripheral wall removed above, the end portion of the handle portion 18 could be raised during retort processing, making it easy to open.

The handle part 6 is easy to grasp because it floats up during processing. I learned that the handle part 6 makes it easy to lift.

The present invention was completed based on the above findings, and includes oxygen,
A base material (hereinafter referred to as a multilayer base material) in which a heat-meltable resin layer is formed on both sides or one side of a water-impermeable base material such as gold foil, sheet, or film, is coated with the compound necessary for opening the can. In a can-like container lid formed with a handle made of resin, the handle has one or more ridges extending from the -@ edge to the other edge of the handle. The present invention provides an easy-to-open lid for a stipend container.

Next, an embodiment of the present invention will be described based on FIGS. 8 to 10.

Figure 8 is a plan view of the stipend container lid of the present invention, and Figure 9 is Figure 81.
10 is a sectional view taken along the line 11 of FIG. 8.

As shown in these figures, in the stipend container lid of the present invention, a portion of the peripheral wall is removed at an appropriate location, and both ends of the crest 220 are extended to the position of the removed peripheral wall.

In the embodiment shown in FIG. 8, the peak portion 22 has one strip, or may have two or more strips.

Further, the shape of the crest may be arbitrary, such as triangular, trapezoidal, or serrated.

[Brief explanation of the drawing]

Figure 1 is a plan view of the can-like container lid, Figure 2 is Figure 1-1-II.
II sectional view, FIG. 3 is a perspective view of the can-like container, FIG. 4 is a plan view of the can-like container lid after opening, FIG. 5 is a sectional view taken along the line 1-1 in FIG. 4, and FIG. 6 is a conventional A plan view of an example can-like container lid, Fig. 7 is the 6th
Figure 8 is a plan view showing an embodiment of the present invention, Figure 9 is a sectional view taken along line 8 and 11, Figure 10 is Figure 8 V.
-V@ cross-sectional view. 1... Multilayer base material 2... Base material 6.4... Heat-meltable resin layer 5... Resin layer 6... Handle part 22... Mountain part

Claims (1)

[Claims] A base material (hereinafter referred to as a multilayer base material) in which a heat-meltable resin layer is formed on both or one side of a base material such as a metal foil, sheet, or film that is impermeable to oxygen, water, etc., is coated with the necessary materials for opening the can. In a can-like container lid having a handle made of synthetic resin, the handle is provided with one or more ridges extending from one edge of the handle to the other edge of the handle. An easy-to-open can-like container lid characterized by: