JPS60183306A - Manufacture of packaging bag - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a packaging bag that is easy to open, has a unique appearance, and is excellent in display.

BACKGROUND OF THE INVENTION Various types of packaging bags have been known for packaging articles, particularly confectionery and light miscellaneous goods, such as pillow packaging, three-side seal packaging, and four-side seal packaging. With the recent changes in the diversification of consumer needs, packaging bags have not only their original function of enveloping and protecting the packaged goods.
Products are required to have additional functions, such as being easy to open for use, being resealable, and having a more discreet design on the exterior to stimulate people's desire to purchase the product.

The present invention was devised in view of the need for a packaging bag with such diversified functions, and is capable of efficiently manufacturing a packaging bag having an outwardly folded band on the surface of the bag. The purpose is to provide a method that can be manufactured at low cost.

In order to achieve the above-mentioned object, the packaging method according to the present invention involves laminating web-like packaging materials to each other at portions separated by a predetermined width from both ends of the web in the longitudinal direction, so that the strip-shaped portion consisting of the strips extends from the laminated portion. The present invention is characterized in that an extended cylindrical body is formed, and then the strip is folded back to the outside of the cylindrical body, and the cylindrical body is laterally sealed at predetermined intervals.

Next, the packaging method according to the present invention will be described in detail below with reference to preferred embodiments and the accompanying drawings.

FIG. 1 is a perspective view showing a schematic configuration of an apparatus for suitably implementing the method according to the present invention, FIG. 2 is a schematic process diagram when implementing the method according to the present invention using the apparatus shown in FIG. 1, FIG. 3 is a perspective view of a packaging bag obtained by the method according to the present invention, and FIG. 4 is a sectional view taken along the -TV line in FIG. 3.

To explain the configuration of an example of an apparatus for carrying out the method of the present invention, in FIG. 1, reference numeral 32 indicates a strip-shaped packaging material, for example, a packaging material made of an integral web such as a plastic film 11 or a sheet, or a packaging material made of plastic, metal foil, paper, etc. Packaging materials are used that are made of composite webs that are selectively bonded together and subjected to lamination or other coating processing. Reference numerals 36 and 36 indicate a pair of delivery rollers that feed the packaging material 32 wound around the roll 30 to the bag making device P738, and 34, 34, . The installed guide rollers are shown. Covered item W is
The bags are pressed by pushers 28 provided at appropriate intervals on the supply conveyor 26, and are sequentially supplied into the bag making device 1138. A tension roller designated 40.40 is used to pull the ends 14 of the packaging material 32, as shown in FIG. 2(a).
, 1.4, a pair of strips (described later) separated by a predetermined width are held and pulled and sent downstream. A longitudinal sealing device w42 is provided downstream of the tension rollers 40, 40, which device consists of a pair of heated sealing rollers 44.44. Note that the code 46 is
instructing a folding device to fold the strip outward;
Further, reference numeral 48 indicates a lateral (width direction) sealing device that is disposed below "1" in the feeding direction of the cylindrical body F2 and applies lateral seals at predetermined intervals to the cylindrical body F2.

A method for manufacturing a packaging bag according to the present invention will be described below using the apparatus configured as described above.

In FIG. 1, the rear ends of the objects W to be packaged are pushed by the pushing piece 28 of the supply conveyor 26, and the objects W are fed into the bag making device 38 one after another at regular intervals.

Further, the packaging material 32 made of a belt-like web wound around the roll 30 is pinched by a pair of rollers 36, 36 and fed out in one direction, and guided by a series of guide rollers 34 to a bag making device 383-. Head over. In this bag-making device 38, the packaging material 32 is overlapped in a longitudinal direction part separated by a predetermined width from both end edges 14, 14, so that the overlapping part is formed by a pair of strips 16, 16. A hollow cylindrical body F1 is formed. The object to be packaged W is wrapped in this cylindrical body F1.

A pair of tension rollers 40.40 disposed on the downstream side of the bag-making device 38 pull the strip section 17 made up of the strips 1.6.16 toward the downstream side while pinching the strip section 17. 2(a) figure), this tension roller/10,4
．． 0, a pair of left and right heated seal rollers 4, 4. , 44 is applied to the base of the strip 17. Strips 16, 16 extending with a predetermined width are formed between the linearly sealed bonded portion 20 and each edge portion 14, and eventually a strip-like structure is formed by these strips 16, 16. Part 1
7 in the longitudinal direction is obtained (second (b)
)figure). The folding device 46 is then inserted into the strip 16,1.
6, the pair of strips 16,
16-4~ are expanded from the bonding part 20 forming the base toward the outer surface of the cylindrical body F2 and folded back (FIG. 2(c)). Next, the cylindrical body F2 in which the items to be packaged W are individually housed is
A pair of upper and lower heated seal members 50, 50 (lateral seal device 48) disposed downstream of the bending device 46 sequentially seals 22, 22 in the lateral direction at predetermined intervals (cutting may be performed at the same time as sealing). As a result, as shown in FIG. 3, a packaging bag 10 is obtained, which has a strip 17 consisting of a pair of strips 16, 16 in the longitudinal direction on the outer surface of the bag, and in which the article to be packaged W is sealed. The packaging bag 10 manufactured in this manner is transported to a predetermined collection point by the transport conveyor 52.

FIG. 5 shows another embodiment of the method according to the present invention, in which the packaging material 32 is overlapped at a portion separated by a predetermined width from one longitudinal edge 14 to form a cylindrical body Fl. 6(a)), then linearly sealed in the longitudinal direction by a vertical sealing device 43 by blowing hot air, and a cylinder having a strip 16 of a predetermined width extending at the bonded portion 20 obtained by the sealing. Forming the shaped body F2 (6th (1)
)figure). Then, the strip 1 is folded by the folding device 46.
6 is bent from the pasted part 20 toward the outer surface of the cylindrical body F2 (FIG. 6(c)), and then horizontal seals 20 are applied at predetermined intervals by a horizontal sealing device 48, thereby creating a shape as shown in FIG. A packaging bag 1° having the strip 16 shown in FIG. 8 is obtained.

Note that the seal in the longitudinal direction may be either a continuous seal or a discontinuous seal (also referred to as a point seal), and this sealing method may be an adhesive method using a pressure-sensitive adhesive other than a heat sealing method.

The method for manufacturing packaging bags using this adhesive method will be briefly explained based on FIG. A device 54 applies a continuous line of pressure sensitive adhesive to the longitudinal edge 14 . After applying the pressure-sensitive adhesive in this way, the packaging material is fed to the bag-making device [38 to form a cylindrical body F1, and a suitable pressure-adhesive bag W58, for example, a pair of pressure rollers 60. Pressure is clamped to glue the longitudinal direction in a linear manner. In this way, a cylindrical body F2 is formed which has a strip 16 extending a predetermined width from the bonded portion 2o at the bonding site. Thereafter, as explained in FIGS. 1 and 5, the strip 16 is folded back outwardly by the folding device 46, and further sealed in the lateral direction at appropriate intervals by the lateral sealing device 48, so that the strip 16 is sealed in the longitudinal direction. A packaging bag having a form as shown in FIG. 3 or FIG. 7, which is laminated with a pressure-sensitive adhesive, is obtained.

The packaging bag obtained by the manufacturing method according to the present invention can be easily opened by simply picking the strip 17 made up of the strips 16, 1.6 with your fingers and pulling them in the direction of separating them from each other. I can do it. In addition, when making a resealable bag, the pasting means in the pasting section 20 is
Any means that can be opened and closed repeatedly may be selected, such as an adhesive method, an interlocking method, or a one-way zipper method.

According to the method for manufacturing a packaging bag according to the present invention, packaging bags with additional functions such as ease of opening and resealability can be manufactured continuously at low cost by appropriately selecting the laminating means. Moreover, since this packaging bag has a unique external shape, it has the advantage of enhancing the display effect and significantly improving the image of the product. Note that as a method for applying the pressure-sensitive adhesive, a nozzle method, a roll method, etc. are suitably used.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a perspective view showing a schematic configuration of an apparatus as a preferred embodiment for implementing the method according to the present invention, and FIG. 2 is a perspective view showing the schematic configuration of an apparatus for implementing the method according to FIG. 1. FIG. 3 is a perspective view of a packaging bag obtained by the method according to the present invention, FIG. 4 is a sectional view taken along the line TV-TV in FIG. 3,
FIG. 5 is a perspective view showing a schematic configuration of another apparatus for implementing the method according to the present invention, FIG. 6 is an explanatory diagram schematically showing the steps in implementing the method according to FIG. 5, and FIG. Figure 8 is a perspective view of a packaging bag obtained by the method shown in Figure 5.
The figure is a sectional view taken along the line ■--■ in FIG. 7, and FIG. 9 is a perspective view showing the schematic structure of yet another embodiment of the apparatus-8 for carrying out the method of the present invention. 10... Packaging bag + 4, 14... Edge 16.
... Strip 2o ... Pasting section 32 ... Packaging material 42 ... Vertical sealing device 46 ... Folding device 48 ... Horizontal sealing device 54 ... Adhesive Coating device 58... Pressure adhesion device Fl, F2... Cylindrical body W... Item to be packaged JP-A-Sho GO-183306 (
4) FIG, 2 FIG. 3 FIG, 4 FIG, 6 FIG, 7 FIG, 8

Claims (1)

[Claims] Web-shaped packaging materials are laminated to each other at portions separated by a predetermined width from both ends of the web in the longitudinal direction to form a cylindrical body with a strip-like portion extending from the laminated portion, and then the strip 1. A method for manufacturing a packaging bag, which comprises folding back the cylindrical body to the outside thereof and applying seals in the lateral direction to the cylindrical body at predetermined intervals.