JP2004083046A - Heat-sealing method for opening face in packaging machine, and tight-finishing device using the heat-sealing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a finishing device for realizing tight packaging when both ends of a substantially rectangular film overlap in an envelope shape or a palm-folding shape, and heat-sealed in a cylinder, and an opening surface is heat-sealed. <P>SOLUTION: A packaging machine heat-seals a substantially rectangular article (20) by a substantially rectangular film (10). Both ends of the substantially rectangular film (10) overlap and are heat-sealed in a cylinder, and a pair of films (11 and 12) facing an opening surface are pushed and expanded in the transverse direction along the center line. Another facing pair of films (13 and 14) overlap so that the film (10) is brought into contact with the article (20) by folding plates (21 and 21) from upper and lower parts, and pressed diagonally by seal plates (22 and 22) and heat-sealed. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for heat sealing an opening surface in a packaging machine and a tight finishing device in a packaging machine using the heat sealing method.
[0002]
[Prior art]
Recently, as a method of heat sealing an opening surface in a multi-packaging of candy, chocolate, or the like, for example, as shown in FIG. 2, a pair of films (11, 12) facing the opening surface is laterally triangulated along a center line. While expanding in a shape, the other pair of opposite films (13, 14) is pressed from above and below to heat seal, and the sealed portion (15) is folded down to form triangular ears (16, 17) at both ends. ) Is folded inward and thermocompression-bonded to the opening surface to increase the hermeticity of the package.
[0003]
However, in this packaging form, after the pair of films (11, 12) on the side surface is spread out, the other pair of films (13, 14) in the vertical direction is immediately heat-sealed, so that it is difficult to form a tight package. Also, there is a problem that the packaging film needs a dimension (s) with a margin (see FIG. 3).
[0004]
[Problems to be solved by the invention]
The present invention has been made in order to eliminate the above-mentioned problems relating to a packaging form in which both ends of a substantially rectangular film are overlapped in an envelope shape or a palm shape and heat sealed in a cylindrical shape, and the opening surface thereof is heat sealed. It is an object of the present invention to provide a finishing device capable of tight packaging in a packaging machine.
[0005]
[Means for Solving the Problems]
The invention according to claim 1 of the present invention is a packaging form in which a substantially rectangular parallelepiped article is heat-sealed with a substantially rectangular film. The substantially square opening surface is folded so as to push a pair of opposing films in a horizontal direction along a center line, and is pressed from above and below so that the other pair of opposing films contact an article. A heat sealing method for an opening surface in a packaging machine, wherein the inner surfaces of the packing materials are overlapped and heat sealed.
[0006]
As described above, according to the first aspect of the present invention, both ends of the substantially rectangular film are overlapped in an envelope shape or a palm shape and heat sealed in a cylindrical shape, and the substantially square opening surface is centered on a pair of films facing each other. Along the line, it is folded so that it can be pushed and spread laterally, and the other pair of opposing films is pressed from above and below so as to come into contact with the article, and the inner surfaces of the films are overlapped and heat-sealed. Enables tighter heat sealing packaging.
[0007]
The invention of claim 2 is a packaging machine for thermally sealing a substantially rectangular parallelepiped article with a substantially rectangular film, wherein both ends of the substantially rectangular film are overlapped in an envelope shape or a palm-shape shape and thermally sealed in a tubular shape. A pair of films facing each other were spread laterally along the center line along the substantially square opening surface, and another pair of the facing films were overlapped from above and below by folding plates so that the films contacted the article. A tight finishing device in a packaging machine, characterized in that the sealing is performed by pressing from a diagonal direction by a sealing plate and then heat sealing.
[0008]
As described above, according to the second aspect of the present invention, both ends of the substantially rectangular film are overlapped in an envelope shape or a palm shape and heat sealed in a cylindrical shape. After spreading the film in the horizontal direction along the line and laying the other pair of opposing films from above and below with a folding plate so that the films come into contact with the article, the sheet is pressed obliquely by a sealing plate and heat sealed. Therefore, the opening surface is a device capable of tighter heat sealing and packaging.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
A method for heat sealing an opening surface in a packaging machine of the present invention and a tight finishing device using the heat sealing method will be described below in detail based on one embodiment.
The tight finishing device in the packaging machine of the present invention is, for example, a packaging machine for thermally sealing a substantially rectangular parallelepiped article (20) with a substantially rectangular film (10) as shown in FIGS. 1 (a) and 1 (b). Then, both ends of the substantially rectangular film (10) are overlapped in an envelope shape or a palm shape and heat sealed in a cylindrical shape, and the substantially square opening surfaces of the pair of opposite films (11, 12) are aligned along the center line. Then, the other pair of films (13, 14) is overlapped from above and below with a folding plate (21) so that the films come into contact with the articles, and then sealed with a sealing plate (22). This is a tight finishing device in a packaging machine characterized in that heat sealing is performed by pressing from an oblique direction.
[0010]
The mechanism in which both ends of the substantially rectangular film (10) are overlapped in an envelope shape or a palm shape and heat sealed in a cylindrical shape, and then the substantially square opening surface is heat sealed with a film will be described in further detail.
[0011]
Generally, a film is supplied to a packaging machine in a wound state, and the film is cut into a rectangle on the packaging machine.
First, a substantially rectangular parallelepiped article (20) is placed substantially at the center of a substantially rectangular film (10).
Then, both ends of the substantially rectangular film (10) on which the article is placed are overlapped in an envelope shape or a palm-shape shape so as to wrap the article, and are sealed in a tubular shape.
[0012]
A pair of films (11, 12) opposed to each other on the opening surface of the cylindrical film are spread laterally along the center line.
At the same time, another pair of opposite films (13, 14) is overlapped from above and below with a folding plate (21) so that the films come into contact with the article (20), and then obliquely by a sealing plate (22). Press and heat seal (see FIG. 2).
[0013]
When the pair of films (13, 14) are brought into contact with the article (20) using the folding plates (21) from above and below, and the pair of films are heat-sealed (15), the sealing plate (22) is used. ) Is pressed obliquely outward toward the center of the opening, so that the opening can be tightly sealed.
[0014]
That is, in sealing the opening, not only the sealing is performed by pushing and spreading in the lateral direction, but also a pair of films (13, 14) is folded from above and below using the folding plate (21) before the sealing, before the article (20). By providing a tight finishing device for contacting the package, a tightly packaged product having a tight finish can be obtained.
[0015]
【The invention's effect】
As described above, by using the heat sealing method for the opening surface and the tight finishing device using the heat sealing method in the packaging machine of the present invention, a tightly packaged sealed package can be obtained.
[Brief description of the drawings]
FIG. 1 shows an embodiment of a method for heat sealing an opening surface in a packaging machine of the present invention and a tight finishing device using the heat sealing method. FIG. 1 (a) is a schematic explanatory view, and FIG. FIG. 2 is an enlarged explanatory view showing a heat-sealed state of an opening surface of FIG.
FIG. 2 is a process explanatory view showing a method of heat sealing an opening surface in a packaging machine.
FIG. 3 is an explanatory view showing a heat sealing state of an opening surface in a conventional packaging machine.
[Explanation of symbols]
10} Film 11, 12} A pair of opposing films 13, 14 {Another pair of films 15} Heat sealing portions 16, 17 {Triangular ears 20} Rectangular object 21> Fold plate 22 ‥‥ seal plate s ‥‥ extra dimension

Claims (2)

In a packaging form in which a substantially rectangular parallelepiped article is heat-sealed with a substantially rectangular film, both ends of the substantially rectangular film are overlapped in an envelope shape or a palm-shape shape and heat-sealed in a tubular shape, and a pair of substantially square openings facing each other is formed. The film is pressed and spread from above and below so as to contact the other pair of films with the article, and the inner surfaces of the films are overlapped and heat sealed. Heat sealing method of the opening surface in the packaging machine. A packaging machine for heat sealing a substantially rectangular parallelepiped article with a substantially rectangular film, wherein both ends of the substantially rectangular film are overlapped in an envelope shape or a palm shape and heat sealed in a cylindrical shape, and the substantially square opening surfaces thereof are opposed to each other. After spreading a pair of films in the horizontal direction along the center line, another pair of films facing each other are overlapped from above and below with a folding plate so that the films come into contact with the article, and then the sheet is inclined by a seal plate. A tight finishing device in a packaging machine characterized by further pressing and heat sealing.

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