JPS6226345Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a paper container with a straw insertion hole that can be used primarily for roof-shaped paper containers that have been commonly used in recent years as containers for liquids such as milk and juice.

Conventionally, liquid containers with straw insertion holes have been prepared by drilling a straw insertion hole in a liquid paper container in advance and sealing the hole with paper or aluminum foil, etc. Generally, a straw insertion hole is formed with a cut that is more than half the thickness of the paper, and the hole can be opened by pushing the inside of the cut with a finger or the tip of a straw, but these are time-consuming and expensive to manufacture. It had various drawbacks, such as a high risk of producing defective products and being unsanitary.

In order to eliminate these drawbacks, in recent years, as shown in Figs. By pinching the tip of the part and pulling it upward, the part surrounded by the half-cut line 3 is delaminated, and the part surrounded by the half-cut line 1 within the half-cut line 3 is completely opened. In other words, since the part surrounded by the half-cut line 1 has already been cut from the peeled surface where the layer has been delaminated to the inner surface of the container body, the part surrounded by the half-cut line 1 has been cut by the half-cut line 1 without delamination. It adheres to the broken and delaminated portion 3' and is pulled. Therefore, in this invention, it is an absolute requirement that the layers be accurately peeled off before the tip of the part surrounded by the half-section line 3 starts to be pulled; however, in this invention, it is not possible to satisfy this condition. The drawback is that it is not always easy.
Therefore, one way to eliminate this drawback is to form the tip of the half-cut line 3 so that it overlaps with the fold line 5 of the container body, so that there is some delamination between the layers, so that the tip of a finger is likely to get caught on the tip of the half-cut line 3. Some ideas have been proposed to do this, but they have not always been sufficient. The present invention eliminates this drawback.

To explain one embodiment of the present invention using figures, the third
4 and 4 are a developed view and a perspective view after assembly of the paper container with a straw insertion hole according to the present invention,
Half-cut lines 1 and 3 are provided on the roof plate of an ordinary roof-shaped liquid paper container. A half-cut line 1 is formed from the inner surface of the container at a depth approximately half the thickness of the paper in a circular shape slightly larger than the cross-sectional outer circumference of the straw to define a straw insertion hole 2. It is formed into a U-shape at a depth approximately half the thickness of the paper from the outer surface of the body. The tip 4 of the U-shaped half-cut line 3 is carved close to the boundary line between the roof plate of the liquid paper container and the body plate portion following it. Therefore, the present invention is characterized in that the fold line 5 of the container body is carved along the boundary line except for the area near the tip 5. With this configuration, the present invention has the following remarkable effects compared to those shown in FIGS. 1 and 2.

(1) When assembled as shown in Figure 4, the part A near the part where the fold line 5 is not provided has a straight line as in the case of Figures 1 and 2, which are bent along the fold line 5. It does not bend sharply, but is curved into a gentle curved surface over a relatively wide area, and there is a tendency for delamination to occur at the half-section line 3 over the entire curved surface. Therefore, in the case of FIGS. 1 and 2, the area where the tip of the half-cut line 3 and the fold line 5 overlap, that is, the area where the two are in contact, is a so-called point where there is a slight delamination between the layers. However, in contrast, in the present invention, a relatively wide part of the tip 4 of the half-cut line 3 has a small area, and it is extremely difficult to hook your fingertip onto that part to initiate delamination. Because of this, it is extremely easy to hook your fingertips and start delamination.

(2) In the case of Figures 1 and 2, the tip of the half-cut line 3 and the fold line 5 overlap, so the tip of the half-cut line 3 is affected by the pressing force when cutting the fold line 5. As a result, it becomes embedded in the thickness of the paper, making it extremely difficult to hook the fingertip and begin delamination.
On the other hand, in the present invention, such a problem does not occur at all because the fold line 5 is carved except in the vicinity of the half-cut line 3.

The shape of the half-section line 3 of the present invention is not limited to that shown in FIGS. 3 and 4, but may be, for example, as shown in FIGS. 5A and 5B.

[Brief explanation of the drawing]

1 and 2 are a perspective view showing a conventional liquid container in use and an enlarged end view, partly cut away, showing the container after assembly, respectively.
The figures show one embodiment of the present invention, with Fig. 3 being an exploded view seen from the outside, Fig. 4 being a perspective view showing the state after assembly is completed, and Figs. 5A and 5B being partially exploded views showing other embodiments of the present invention. Explanation of the symbols representing the main parts of the figures: 1, 3...
...half-cut line, 2...straw insertion hole, 4...tip, 5...fold line.

Claims (1)

[Scope of utility model registration request] A straw insertion hole 2 is provided in the roof plate of the roof-type paper container, and the straw insertion hole 2 is defined by a half-cut line 1 carved from the inner surface side and has a depth approximately half the thickness of the paper. The U-shaped half-cut line 3 is located at a depth of approximately half the paper thickness from the outer surface of the roof board, and the U-shaped tip 4 is the boundary line between the roof board and the body board that continues below it. A paper container with a straw insertion hole, characterized in that the fold line 5 of the container body is cut along the boundary line except for a portion near the tip portion 4.