JPS6050657B2 - container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to containers, and particularly to packaging containers formed from flexible laminated packaging materials.

BACKGROUND OF THE INVENTION The present invention is an improvement on the invention described in British Patent Application No. 26540/77.

Said document describes a container with a tear strip for opening the outlet 06. The area to be opened by the tear strip is closed by an inner mask seal, and some areas of the inner mask seal are connected to the tear strip. In addition, in the specification of Patent Application No. 80501 filed in 1972 by the applicant of the present application,
A reinforcing layer is disclosed between the above-described inner mask seal and the laminate material of the container.

The reinforcing layer is provided with a spout opening at which the inner mask seal is coupled to the tear strip. C. Problems to be Solved by the Invention In the technique disclosed in the aforementioned 1930 Detailed Patent Application No. 80501, the liquid J in the container may spill out at the moment the tear strip is lifted to open the container. be.

That is, a portion of the inner mask seal, ie, the portion to be opened, is bonded to the tear strip, while other portions of the inner mask seal are secured to the container body by the reinforcing layer. Therefore, the moment the inner mask seal is torn, the container may shake and the liquid inside the container may spill. 2. Means for Solving the Problems In order to solve the above-mentioned problems, in the container of the present invention, (a) the tear opening area is covered with an inner mask seal, and (b) the tear opening area is covered with the inner mask seal. (c) the line of weakness for the tear opening is bonded to the material forming the container such that when the areas are torn open, only a portion of the corresponding area of the inner mask seal is torn together; (d) the non-tear area of the inner mask seal has a short cut extending completely through the inner mask seal but not into the inner mask seal to facilitate initiation of the tear opening operation; (e) a portion of the reinforcing layer is not bonded to the inner mask seal at the location where the tear opening region is initially torn open.

E. When the tear opening area formed by the weakening line for the tear opening is pulled up, the part of the inner mask seal that is coupled to the tear opening area is pulled up together with the tear opening area, and the inner mask seal is pulled up together with the tear opening area. The part of the seal covered by the reinforcing layer remains fixed to the container body.

However, during the initial stage of pulling up the tear-opening area, the inner mask seal is lifted slightly in areas where the reinforcing layer is not bonded to the inner mask seal, and the shaking of the container at the moment of rupture of the inner mask seal is eased. Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In order to carry out the invention in a convenient form as shown in the drawings, a material of packaging material is provided, which material is formed from an outer layer of paper or cardboard bonded to an inner layer of plastic material. Of course, the inner layer must be liquid-tight if the container is to contain a liquid.

The packaging material can, if desired, include other layers, such as an outer plastic layer and a metal foil layer.
This material has pre-formed bending lines to facilitate bending it into a parallelepiped shape when forming a container. The material can be part of a web of packaging material that is formed into a tube by seam welding opposite longitudinal ends together, and after seam welding the tube is transversely The packaging containers are sealed and formed into a plurality of connected packaging containers which are then filled with a content, such as milk, which are then separated into individual containers by cutting the seal area. A method for filling, forming, sealing and separating such packaging containers is disclosed in British Patent No.
No. 12867 and No. 1462956. Referring to the drawings, FIG. 1 shows an external view of the portion of the packaging material that will become the upper end of a container made according to the method described above. When the web is folded around the line, the opposing regions and ends of the web are brought together and the opposing ends are sealed in overlapping relationship, so that the unoebu is filled with a filling, such as milk. can be formed into a tube. When the web is folded around a line, the transverse strips are visible and visible? Are these strips after their inner surfaces are joined and the tube is filled? 4th and E
Individual packaging containers are defined by heat sealing the inner surfaces of the bfs together. The containers are separated by cutting through these seal areas. The container can be formed into a parallelepiped shape by appropriate relative folding of the panels defined by the fold lines of the material. The drawing shows an end panel 1, a front wall panel 2, a rear wall panel 3 and opposing side wall panels 4, 5,
Each of the sidewall panels is formed with a seal fin that folds flat against the panel. When the half panel 4 or 5 forming the side wall of the container is folded into the position shown in FIGS. A triangular projection that is folded under the central isosceles triangular portion 7 and projects outward (Fig. 2)
is formed, and this protrusion is formed on the side walls 4 and 5 in the finished container.
It is folded down and joined (Figure 3). To facilitate the opening of such filled containers, a tear strip is provided, which strip can be manipulated with a finger to open the outlet hole. The tear strip is defined by a line of weakness, such as a perforation line in the container top panel. This line connects to a loop 9 in the portion 7 of the triangular projection 2 in the top panel 1.
It can have two substantially parallel leg portions 8. Said perforation can also penetrate the panel 1 and the triangular projection and the layer of side wall 5 to which it is connected, so that the looped portion of the tear strip is pried out from its periphery;
When the strip is pulled upwardly and torn open along the perforation line 8, a substantial hole is opened in the wall of the container. To prevent the contents of the container from escaping through this large hole, a mask seal 10 of plastic material is affixed to the inside surface of the container around and over the hole (FIG. 5). The inner surface of the tear strip is aligned with the leg 8 of the perforation line in order to form an exit hole for the contents of the container when the tear strip is lifted.
It is attached to the mask seal 10 in a predetermined area between. This region is preferably a tongue-shaped region 11 (FIG. 5). All other inner areas of the tear strip are prevented from adhering to the mask seal 10, for example via an anti-adhesion agent. Therefore, as shown in FIG.
Although the gap is torn apart, other areas of the mask seal 10 remain intact so that the container obtains an exit hole 12 for the contents. The tongue-shaped region of the outlet hole can be defined by a plastic U-shaped reinforcing layer 13 affixed to the mask seal 10 between the perforation lines 8 .

The lip portion 14 at the outer end of this reinforcing layer 13 is
When the tear-off piece is lifted, it projects freely beyond the edge of the container, and the reinforcing layer 13, with this projecting lip 14, provides a barrier for the contents of the container when it is poured through the hole 12. Provides a clean flow surface. A reinforcing strip 15 made of plastic material is attached to the tear strip and the mask seal 1 to which it is attached.
It is fixed between the tongue-shaped area of 0 and the tongue-shaped area of 0. When the user attempts to open the container by separating the looped portion of the tear strip from its surroundings, for example using his fingers,
A certain degree of difficulty arises.

In order to reduce this difficulty, a portion of the perforation line 9 is cut into the packaging material. Preferably, the cut is such that it defines a protrusion at the end of the loop region of the tear strip. In the tear strip of the form illustrated in the accompanying figures, the loop line 9 has two short score lines so as to form a triangular protrusion 16 projecting from the loop portion of the tear strip at substantially right angles to each other. are doing. As shown in FIG. 1, these cuts preferably extend across and beyond the fold line between panel sections 6 and 7, so that when the panel sections are folded together, projections 16 protrudes from the triangular protruding end of the container (Fig. 3), making it easy to grasp. The user uses a fingernail to lift this protrusion 16 and tear open the loop portion and then the entire inner length of the tear strip, exposing the hole 12 by tearing the tongue-shaped area 11 of the mask seal 10. , the contents of the container can be poured from the hole 12 onto the substantially sterile surfaces 13,14. Arrow 17 formed on protrusion 16
Markings such as or arrows 18 on the container wall may be provided to draw the user's attention to how to open the container. The shape of the tear strip, the shape of the protrusion 16, or the shape of the hole 12 can be changed as desired;
Furthermore, it is also possible to vary the shape and dimensions of the containers in which they are contained.

) When the tear strip is lifted, it is necessary to ensure that the liquid contents of the container (completely filled and no air is included) spill out at the initial opening of the hole 12.

To that end, one or several subareas 5 of the plastic reinforcing layer 13 are not bonded to the mask seal 10 near the end of the hole 12 that is first torn. That is, two small areas 20 of the reinforcing layer 13, shown as rectangles (FIGS. 4 and 5), are not attached to the mask seal 10. O the sides of the tear strip are slightly sloped from the inner folded end of the strip;
This shape provides a stuffing effect (when the strip is folded down again after opening) and the strip is closed again.

When a further reclosable retention means is desired, a medium pressure sensitive adhesive can be applied to the inner surface of the loop portion 9 of the tear strip so that the strip can be pressed against the mask seal 10 when the strip is reclosed. Can be held in place. If desired, remove the crescent-shaped strip from the adjacent container wall along a predetermined length of line of weakness to facilitate grasping the ends of the loops 9 of the tear strip (with the exception of mask seals). leave it as it is)
I can do it.

This means can be used instead of the protrusion 16 or in addition to the protrusion 16. Constructions are known in which the sealing fins in parallelepiped containers, instead of extending along the sides of the container (as shown in FIGS. 2 and 3), extend across the ends of the container between the vertices of the triangular side flaps. There is.

When the invention is applied to containers of this type, the tear strip between the perforation lines 8 is placed on one side of the center line of the top surface of the container, so that the strip does not interfere with the folded-down fins. 2, the loop portion 9 of the tear-open flap can be of smaller dimensions or of a different shape for the same reason.

Effects of the Invention In the present invention, in particular, a portion of the reinforcing layer covering the inner mask seal is not bonded to the inner mask seal in the tear-opening area or the position where the tear-opening is first performed. This has the effect of preventing the liquid inside the container from spilling out at the moment of tearing.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a part of the material of the packaging material from which the container according to the present invention is formed, and FIGS. 2 and 3 are perspective views of a part of the container formed from the material shown in FIG. 1. , FIG. 4 is a perspective view of the container of FIG. 3 after the outlet hole is exposed, and FIG. 5 is a perspective view of the container of FIG.
The figure is an inside surface view of a portion of the material of FIG. 1. 8, 9... Weakening line, 10... Inner mask seal, 11... Tongue-shaped area, 12...
...Outlet hole, 13...Reinforcement layer, 16...
...Protrusion, 20...Rectangular small area.

Claims (1)

[Claims] 1. A container with a line of weakness forming a region adapted to be torn open to provide an exit hole, wherein (a) said tear-opening region is covered by an inner mask seal, and (b) the tear-open region is coupled to the inner mask seal such that when the region is torn open, only a portion of the corresponding region of the inner mask seal is torn together; (c) the line of weakness is
(d) having a short cut extending completely through the material forming the container but not into the inner mask seal to facilitate the initiation of a tear-open operation; the tear region is covered by a reinforcing layer, and (e) a portion of the reinforcing layer is not bonded to the inner mask seal at the location where the tear opening region is initially torn open; A container featuring: