JP3323930B2 - Liquid filled paper carton and sealing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-filled paper carton for fixing and sealing a side wall joint and a bottom and a sealing method thereof, and is used for filling milk, juice, liquor, liquid seasonings and the like.

[0002]

2. Description of the Related Art As this type of paper carton, a backing sheet provided with a thermoplastic resin film layer on the back side is folded along a fold on a side wall, and a joint portion is heat-sealed, and then a bottom flap is folded. There is known a structure in which a container is formed by heat sealing in a flat state, a liquid is filled therein, and a flap extending to an upper portion of a side wall is folded into a roof shape, and a top portion is heat-sealed and sealed. ing. However, when the liquid is poured, the carton 1 can be used regardless of whether the top of the roof is opened or the nozzle 3 attached to the center of the roof 2 is used. Since the fingertip of the holding hand grips the weakest part of the side wall 5, the injection operation was extremely unstable (see FIG. 1). In a large container filled with juice or liquor, the weight is considerable, the side wall area is large, and it is soft. it was a disadvantage you often occurs <br/> the liquid would be poured. When pouring while grasping the corner of the side wall of the carton, stable pouring can be done, but with the conventional structure where the flap is folded into a roof type and sealed, the seal portion is orthogonal to the side wall that is gripped Yes,
It was not possible to provide a spout at the corner of the roof due to the location of the folding overlap at the corner of the roof.

[0003]

The object of the present invention is to allow a liquid to be stably poured from a corner of a carton 10 in a liquid-filled paper carton 10 in which a side wall joint 6 and a bottom 7 are fixedly sealed. Things.

The technical means for solving this technical problem is as follows: (a) Left and right side walls 1 divided into two sets.
Triangular flaps 15, 16 integrally formed from 1, 12, 13 and 14 are extended, and (b) their hypotenuses 21, 2
The seal portions 23 and 24 are connected to each other through a fold line outside of 2,
(C) flaps 15, 16 and side walls 11, 12, and 13,
14 and the mountain fold lines 8 and 9 on the side walls are extended to the flaps 15 and 16 side. (D) The flaps 17 and 17 on the left or right side wall are connected to the mountain fold lines 25 and 26, respectively. (E) When the flap is bent by forming pleat fold lines 27 and 28 which intersect perpendicularly with the oblique sides 21 and 22 of the flap starting from the intersection of the mountain fold lines 8 and 9 on the left and right side walls.
The fold-sealed seal and the other fold-free seal
Face each other diagonally, and (f) the flap of the lid
That is, a nozzle with a cap was attached to the surface .

FIG. 2 is a perspective view of a sealed cart han, FIG. 3 is a surface development view of the carton, and FIG. 4 is a perspective view of the carton during sealing. The mountain fold line shown by the two-dot chain line and the valley fold line shown by the solid line in FIG. 3 are all viewed from the surface of the developed view. Carton 10
Since the triangular flaps 15, 16 integrally formed from the left and right side walls 11, 12, 13, and 14 divided into two sets extend at the upper part of the side wall, the side wall and the bottom are joined. In this state, the triangular flaps 15 and 16 extending from the left and right side walls of the respective sets are opposed to each other with the diagonal line of the rectangular tube opening as a boundary.

The flaps 15 and 16 have side walls 11 and 12
And 13, 14 are provided with mountain fold lines 25, 26, and the valley fold lines 8, 9 on the side walls are flaps 15, 16
Flap 1 on one side wall
7 and 17, the oblique sides 21 and 22 of the flap starting from the intersections of the mountain fold lines 25 and 26 and the mountain fold lines 8 and 9 on the left and right side walls.
When the flaps 15 and 16 are to be bent inward, the surfaces of the flaps 17 are superimposed and folded inward, and the side walls 11, 12 and Triangular lids 30, 31 will be formed on the corners surrounded by the side walls 13, 14. Since the seals 23 and 24 are connected to the outer sides of the oblique sides 21 and 22 of the flaps 15 and 16 via folding lines , when the flaps 15 and 16 are bent, they are folded .
Seal portion and the other pleated non pairs and a seal portion to each other
The carton can be hermetically sealed by sealing and sealing the sealing surfaces 23, 24 .

[0007] across the physique lines lid of the triangle is formed, a lid
A nozzle with a cap is attached to the flap surface of the body
Because there can be a spout by positioning the corners of the carton 10 pouring the liquid. In addition, it is necessary to form a liquid blocking layer on the back surface of the mount for forming the carton 10. This barrier layer is formed by appropriately combining a resin film, a metal foil, and the like.If the innermost layer is formed of a thermoplastic resin film, a seal can be easily formed by a heat sealing method when forming a seal portion of a carton. Can be applied to seal the carton.

[0008]

As a result of pouring the liquid from the corner of the carton 10, the fingers of the hand gripping the carton put a point of emphasis on the corner of the side wall when pouring (see FIG. 5), and the liquid is extremely stable from the nozzle . Has the advantage of pouring liquid.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Mountain fold lines 25, 2 between flaps and side walls
When 6 is formed in a horizontal state, the lid surface formed by the flaps 15 and 16 becomes a horizontal plane. As shown in FIGS. 2 to 5, the outer sides of the base ends of the flaps 15 and 16 of the mountain fold lines 25 and 26 are increased, and the intersections with the mountain fold lines 8 and 9 between the left and right side walls are reduced. When the surfaces 25 and 26 are inclined, the triangular lids 30 and 31 are formed with inclined surfaces, and have an advantage that the design is unique and the liquid can be poured more easily.

In this carton 10, a nozzle 35 with a cap is attached to a hole 34 on the flap surface constituting the outside of the lid. The nozzle 35 fills the carton 10 with liquid.
Before inserting it into the hole 34 and tighten the flange at the base end (not shown).
It will be fixed to the flap 15 . Since the lid surface is a triangle having a diagonal line on one side, the nozzle can be positioned at the corner of the carton . Although the case of increasing the hole 34 for Roh nozzle mounting portion of the pleated portion will cover the part of the hole 34, it does not occur trouble in work of pouring a liquid.

When the above-mentioned paper carton is filled with the liquid and the carton is sealed by folding the flap extending above the side wall, the two sides are integrally formed from two sets of right and left side walls opposed to each other via a diagonal line. A seal in which a triangular flap is bent inward and a flap on one of the right and left side walls is folded inward starting from an intersection of a bending line and a bent portion of the left and right side walls, and is connected to the outside of the flap. Part is bent upwards and the folded seal part
The other unfolded seal portion may be faced diagonally with the other to form a lid, and the seal portions of the left and right sets of flaps may be fixed from outside and sealed. When folding this paper carton,
It is desirable to make a fold in each bent portion in advance. When the back surface of the backing of the carton is made of a thermoplastic film, the sealing portion can be sealed by applying heat and pressure.

[Brief description of the drawings]

FIG. 1 is a perspective view when a liquid is poured from a conventional paper carton.

FIG. 2 is a perspective view of a paper carton according to the present invention.

FIG. 3 is a developed surface view of the paper carton according to the present invention.

FIG. 4 is a perspective view of the paper carton according to the present invention during assembly.

FIG. 5 is a perspective view when pouring a liquid from a paper carton according to the present invention.

[Explanation of symbols]

6 side wall joint, 7 bottom seal, 10 carton, 1
1, 12, 13, 14 Side wall, 15, 16 Triangular flap, 23, 24
Seal part of flap, 25, 16 Fold line between side wall and flap, 27, 28 Fold line, 35 nozzle

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65D 5/08 B65D 5/40 B65D 5/74

Claims (3)

(57) [Claims] 1. A liquid-filled paper carton in which a side wall joining portion and a bottom portion are fixedly sealed to each other, a triangular flap integrally formed from each of two left and right side walls divided into two sets is provided, and an outer side of an oblique side thereof is provided. The seal portion is connected via a fold line, a mountain fold line is provided between the flap and the side wall, and the mountain fold line of the side wall is extended to the flap side. A fold line that intersects perpendicularly with the hypotenuse of the flap starting from the intersection with the mountain fold line, and the fold seal when the flap is folded
Part and the other unfolded seal part are diagonal to each other.
With a nozzle with a cap on the flap surface of the lid.
Liquid filled paper carton installed . 2. The liquid filling according to claim 1, wherein the mountain fold line between the flap and the side wall is constituted by an inclined line in which the outside of the base end of the flap is high and the intersection with the mountain fold line between the left and right side walls is low. Paper carton. 3. A method for sealing a carton according to claim 1 or 2 , wherein the carton is sealed by folding a flap extended on an upper side wall after filling the paper carton with a liquid. A triangular flap integrally formed from the side wall is bent inward, and the flap on one of the right and left side walls is folded inward starting from an intersection of a bending line and a bent portion of the left and right side walls, thereby forming a flap. The seal part connected to the outside of the flap is bent upward to form a lid body that is diagonally contacted with the seal part, and the seal part of the left and right sets of flaps is folded with the seal part folded and the other
A method of sealing a carton in which a seal portion not to be folded is fixed to face each other and sealed.