JPH0454101Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a container sealed by heat sealing, and particularly to a sealed container that can be partially opened.

[Conventional technology and its problems]

There are various ways to open a sealed container with a flexible lid heat-sealed to the opening of the container body.
Some parts are made openable to the bare minimum. There are various structures that allow this kind of partial opening, but for example, if a perforation or cut is made in the lid that surrounds the opening part, and the tab connected to the perforation is pulled, the lid will open along the perforation. The deal broke off,
Some have a partial opening, or a hole is made in the lid in advance and the hole is sealed with something like a label.
Some products remove this label during use.

However, in the former case, perforations or cuts are provided in the lid, which poses a problem with sealing performance, and in the latter case, the process of forming holes in the lid in advance and pasting a label is required, which increases the cost. There's a problem.

The purpose of this invention is to solve the above-mentioned problems and provide a sealed container that has a simple structure and can be partially opened without compromising sealing performance.

[Means of problem solving]

In order to solve the above problem, this invention provides a container in which a lid having a tab is heat-sealed to a flange around the opening of the container body, and the lid is made of a material that is flexible and can be torn by hand. The tab is provided with a pair of substantially opposing cuts whose peripheries are heat-sealed so that a substantially triangular partial opening can be formed in the lid by pulling the tab.

[Effect]

With the above configuration, by pulling the tab when opening the package, the area around the cut is heat-sealed, so the tearing start point is fixed, and the lid begins to break from the tip of the cut, and the tear line starts at both ends. extends toward the center of the lid to form a substantially triangular partial opening.

〔Example〕

Hereinafter, a small sealed container used to store coffee milk or the like, a so-called portion pack, will be explained as an example.

As shown in FIGS. 1 to 3, the container body 1
has a bottom wall 2 and a peripheral wall 3, and around the opening,
A flange 4 is provided. A portion of this flange 4 further protrudes outward to form a protrusion 5 having the same shape as a tab to be described later, and a cut 6 is provided across the lower surface of the protrusion 5.

A lid 10 is heat-sealed to the flange 4 to form a sealed container. This heat seal portion 11 has grooves formed by a sealing method called a so-called ring seal.

The lid 10 is formed with a tab 12 that overlaps the protrusion 5 of the flange 4, and the tab 12 has a cut 1 extending in the direction of the opening of the container body 1.
3 and 13 are provided almost facing each other. Although this cut 13 passes through the lid 10 and the protrusion 5 of the flange 4, it may also pass through only the lid 10.

The pair of cuts 13 are preferably inclined toward the center of the container as shown in the figure, but are not necessarily limited to this, and may include those in which the ends are substantially parallel or in which the ends face each other in a straight line. . The length of this cut 13 may be appropriately selected depending on the size of the partial opening, but the tip should not reach the heat seal portion 11. In order to form such a cut 13, it is most efficient to provide a cutting edge on the heat sealer hot plate and make the cut at the same time as heat sealing. At this time, if the cutting blade is also heated, the periphery 13' of the cut 13 is heat-sealed, as shown in FIG.

Of course, it is not necessary to heat seal the area around the cut 13 at the same time as the ring seal. Separate cut 13
After installing, the surrounding area may be heat-sealed.

To open such a sealed container, first,
By holding the protrusion 5 together with the tab 12 and bending it several times along the cut 6, a part of the protrusion 5 is cut off. When the tab 12 and the lid 10 are pulled upward, the lid 10 is separated at the cuts 13, 13, and the periphery 13' is heat-sealed. As shown in FIG. 4, the break lines 14, 14 converge toward the center of the container body, forming a partial opening 7 in a substantially triangular shape as shown in the figure.

The shape, structure, and material of the container body 1 can be selected from various types. In addition to a round shape, the shape may be oval or polygonal, and the material may be a single synthetic resin or a laminate with metal foil, paper, or the like.

The shape of the lid 10 is determined according to the shape of the opening of the container body 1, but it is necessary to provide a tab 12. The material may be a single piece or a laminate, as long as it is flexible, can be torn by hand, and can be heat-sealed to the container body 1.

〔effect〕

According to this invention, as described above, by making cuts on both sides of the tab and heat-sealing the periphery, the tear starting point is fixed and a substantially triangular partial opening can be formed. Because of this, unlike creating perforations on the lid, there is no risk of compromising sealing performance, and it is extremely simple to process, and can be processed simultaneously with heat sealing, so it is advantageous in terms of cost. It is possible to achieve certain effects.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the sealed container of this invention, Fig. 2 is a plan view of the same, Fig. 3 is a longitudinal sectional view of the same, and Fig. 4 is a plan view showing the sealed container in an unsealed state. . 1... Container body, 2... Bottom wall, 3... Peripheral wall, 4
...Flange, 5...Protrusion, 6...Slit, 7
... Partial opening, 10 ... Lid, 11 ... Heat seal part, 12 ... Tab, 13, 13 ... Cut, 1
4, 14...Broken line.

Claims (1)

[Scope of utility model registration request] A container in which a lid having a tab is heat-sealed to a flange around the opening of the container body, the lid being made of a flexible material that can be torn by hand, and the periphery of the lid being heat-sealed to the tab. A sealed container characterized in that the notches are provided substantially opposite to each other, and by pulling the tab, a substantially triangular partial opening is formed in the lid.