JP2018131209A - Packaging bag and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for easily manufacturing a packaging bag with an inner pocket. SOLUTION: A step of forming a window hole in a base paper constituting a bag main body, a step of attaching a pocket piece for forming an inner pocket from the inside of the base paper to the window hole, and a cylinder making of the base paper into a tubular shape. A pocket is provided in a step, a cutting step of cutting the cylinder at one end side of the window hole to form an inner pocket at the open end of the bag body, and a bottom molding step of molding the bottom of the bag body. By cutting along the end of one piece, an inner pocket can be easily manufactured on the opening edge of the bag body. [Selection diagram] Fig. 3

Description

  The present invention relates to a packaging bag with an inner pocket and a method for producing the same.

  As a packaging bag with an inner pocket, for example, as shown in Patent Document 1, a bag is disclosed in which a pocket is attached to the inside of the bag body near the opening.

  Patent Document 2 discloses a packaging bag in which a window hole is formed in a bag body, and a transparent film that closes the window hole is attached to an inner surface of the bag body.

Japanese Utility Model Publication No. 61-169034 Japanese Patent Laid-Open No. 11-59694

  Recently, fried foods such as French fries have been sold as take-out products in convenience stores and fast food stores, and these cooked foods are sold in paper bags. In such take-out products, sachets containing seasonings etc. are provided at the same time in products such as French fries. However, it is desired that the sachets containing seasonings be provided in the form of packaging bags that can be provided simultaneously with products in paper bags. ing.

  In view of the above, an object of the present invention is to provide a packaging bag with an inner pocket that can accommodate a seasoned sachet as well as a manufacturing method for easily producing such a packaging bag.

  In order to achieve the above object, the present invention includes a step of punching and forming a window hole in the base paper constituting the bag body, and a step of joining an inner pocket forming pocket piece from the inside of the base paper to the window hole, A cylinder making process for forming the base paper into a cylindrical shape, and a cylindrical body obtained by the cylinder making process is cut at one end side of the window hole to form a bag main body, and an inner pocket is formed inside the opening end of the bag main body. The manufacturing method of the packaging bag characterized by having the cutting process of the cylindrical body to form, and the bottom part shaping | molding process which shape | molds the bottom part of the said bag main body is provided.

  According to the present invention, by using a window hole formed in the bag body and a film (pocket piece) attached to the inside of the bag body, a concave window hole whose upper end is opened to the opening edge is formed at the opening edge of the bag body. The film joined to the inside of the window hole also forms an inner pocket by opening the opening edge side of the bag body and using the film as a pocket piece. Therefore, a packaging bag with an inner pocket can be easily manufactured only by devising a cutting process using a conventional manufacturing facility for making a packaging bag with a window hole.

It is a perspective view of the packaging bag which shows embodiment which concerns on this invention. It is sectional drawing which shows the inner pocket of the packaging bag. (A)-(e) is the schematic which shows the manufacturing process of the packaging bag of this invention. (A)-(c) is explanatory drawing which shows a cylinder making process. (A)-(d) is explanatory drawing which shows a bottom folding process. It is a perspective view of a packaging bag showing another embodiment of the present invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the packaging bag 1 of the present embodiment has a concave window hole 4 with an upper end opened to the opening edge 3 at the opening edge 3 of the bag body 2. A pocket piece 5 whose upper end is opened inside the window hole 4 and whose left and right side portions and the bottom portion are joined (glued) is provided, and the pocket piece 5 has an inner pocket 7 in which a seasoning pouch 6 can be accommodated.

  The bag body 2 is a paper material that can accommodate french fries and the like, and is molded from various materials such as a single paper material or a synthetic resin film laminated inside the paper material, and further a synthetic resin material. be able to.

  The bag body 2 of this example is of a horizontal gusset type in which a gusset is formed on the side portion 2a, a vertical fold 10a is formed at the center of the side portion 2a, and the bottom portion of the bag body 2 is It is folded at the bottom of the corner (see FIG. 5).

  Moreover, the window hole 4 of the opening edge 3 of the bag main body 2 is formed using the bag making equipment of the window hole formed in the center of a bag main body, as described in Unexamined-Japanese-Patent No. 11-59694. The Details will be described in the manufacturing method described later. In addition, the window hole 4 may have various shapes such as an elliptical shape, a rectangular shape, a circular shape, or a star shape. However, since the inner pocket serves as an opening edge, a substantially rectangular shape is preferable.

  The pocket piece 5 is a transparent synthetic resin film that closes the window hole 4, but is not limited thereto, and the same material as the bag body 2, or a nonwoven fabric may be used. The upper end of the pocket piece 5 is disposed at a position lower than the opening edge 3 of the bag body 2. This is for providing a folding margin D (see FIG. 1) of the opening edge 3 between the pocket piece 5 and the opening edge 3 of the bag body 2, and the pocket piece 5 is arranged at a position lowered by the folding margin D. The

  Next, the manufacturing method of a packaging bag is demonstrated based on FIGS. The arrows shown in FIG. 3A indicate the direction in which the base paper flows. As shown in FIG. 3 (a), the packaging bag 1 is subjected to a predetermined printing on a roll-shaped bag making base paper 1A having a predetermined width by a bag making machine (not shown) and then as shown in FIG. 3 (a). Next, the window hole portion 4a is punched to form the window hole 4. In FIG. 3A, reference numeral 100 denotes a punched window piece. A pocket piece 5 which is a film for forming a pocket is attached to the punched window hole 4 from the inside of the base paper 1A. The pocket piece 5 cuts a roll-shaped synthetic resin film into a predetermined size and supplies it to the window hole 4 portion one by one. Then, since the film is supplied only to the window hole portion, there is no useless portion of the film.

  At this time, as shown in FIG. 3 (b), the pocket piece 5 does not cover the entire surface of the window hole 4, but leaves the portion of the folding margin D of the opening edge 3 of the bag body 1 from the window hole 4. Shift and join (glue) to the position. Gluing is performed only on the three sides of the left and right sides and the bottom of the pocket piece 5. In FIG. 1, the part shown by the hatching of a broken line is a paste part.

  Next, as shown in FIG. 3 (c), the base paper 1A is mechanically bent to form a horizontal M-shaped horizontal gusset as viewed from the direction of the base paper in the side portion 2a, and the rectangular tube-like cylinder 1B is formed. Mold. The cylinder making process will be described later.

  Next, as shown in FIG. 3D, the cylindrical body 1B is cut into a specified length. This cutting position is a position where the bending margin D of the opening edge 3 of the bag body 2 remains. The cylindrical body 1B is cut into a cylindrical bag body 2 having a predetermined size, the end opposite to the opening edge 3 is the bottom, and the bottom is molded as shown in FIG. The attached packaging bag 1 is molded. As a cutting position, the remaining portion of the window hole 4 remains in a concave shape on the bottom edge side, but this concave portion 18d is reinforced by gluing a rectangular bottom piece 19 as shown in FIG. 5 (d). If it is hidden at the time, or if the bottom piece 18b on the opposite side is used as the front side in the bottom folding process, it will be hidden, so there will be no problem in appearance.

  FIG. 4 shows the cylinder making process. FIG. 4 shows the base paper 1A for one bag for easy understanding. In this cylinder making process, as shown in FIG. 4 (a), three parallel folds 10a and 10b are formed on one edge and the center of the base paper 1A with a molding plate (not shown) in order to make a crease in advance. , 10c. Then, as shown in FIG. 4 (b), the one side edge portion and the substantially central portion of the creased base paper 1A are folded in an M shape, the outer edges of the base paper 1A are bonded together, and a side gusset is attached. The cylinder 1B is manufactured. At the time of pasting, a margin 12 is provided at the end of the base paper 1A. Then, as shown in FIG.4 (c), the cylinder 1B which opens front and back can be shape | molded. This cylindrical body 1B is formed with an M-shaped fold in the left and right side portions 2a.

  Next, the bag body 2 is folded. A bottom folding process can be performed by the well-known method disclosed by the patent 7658 gazette etc., for example. The bottom folding process will be briefly described with reference to FIGS. FIG. 5A shows a state in which the side portion 2a is extended to open the bottom side opening of the bag body 2 for easy understanding. Near the bottom edge 2c of the bag body 2 that has undergone the tube forming process, two parallel folds 13 and 14 for bottom folding are made in parallel with the bottom edge 2c. The first fold 13 is for folding the bottom 18 of the bag body 2 toward the body 2 b of the bag body 2, and is attached over the entire circumference of the bag body 2. The second fold line 14 is for forming the peripheral edge of the bottom 18 and is provided closer to the bottom edge 2 c than the first fold line 13.

  The side 2a of the bag body 2 includes an intersection of the first fold 13 and the center fold 10a of the side 2a, a second fold 14 and the side 2a of the bag 2 and the trunk. An oblique third fold 15 is formed between each of the intersections with the folds 10b and 10c constituting the boundary of the portion 2b. The third fold 15 is formed in a convex shape on the inner surface side of the bag body 2 and is formed at an angle of approximately 45 degrees with respect to the central fold 10a of the side portion 2a.

  In accordance with these folds 13, 14, and 15, as shown in FIG. 5 (b), the bottom edge side is folded from the first fold 13 to about 90 degrees, and the bottom edge 2c of the bag body 2 is widened, 13 and 14 and the diagonal fold 15 are folded, and the bottom edge 2c of the bag body 2 is opened in a square shape. And, between the intersection of the folds 10b, 10c and the second fold 14 at the boundary between the body 2b and the side 2a of the bag body 2 and the bottom edge 2c on the body side, an oblique A fourth fold 16 is provided. The fold 16 is formed in a convex shape on the outer surface side of the bag body 2 and is formed at an angle of approximately 45 degrees with respect to the bottom edge 2c.

  Then, as shown in FIG. 5 (c), it is bent along the fourth fold 16, and the rectangular bottom piece 18a on the side 2a side of the bag body 2 and the trapezoidal bottom pieces 18b and 18c on the body 2b side are formed. Is provided. These bottom pieces 18a, 18b, 18c are folded inward to form the bottom 18 as shown in FIG. 5 (d). The bottom 18 may be reinforced by gluing a rectangular bottom piece 19 as necessary.

  As described above, in the present embodiment, the concave opening hole 4 whose upper end is open to the opening edge 3 is formed in the opening edge 3 of the bag body 2, and the upper end of the pocket piece 5 is opened inside the opening hole 4. The left and right side portions and the bottom portion are joined to form the inner pocket 7. Therefore, a small bag containing seasonings can be accommodated in the inner pocket separately from the packaging bag, and a good-looking bag can be provided when a product such as french fries is provided.

  Further, the upper end of the pocket piece is disposed at a position lower than the opening edge of the bag body, and a bending margin can be formed near the opening edge of the bag body. Since such a bending allowance is formed, seasoning is poured into fried food such as French fries in the bag, the opening edge of the bag body is folded at the bending allowance, the bag is closed, and the seasoning is fried by shaking with the bag. Can be mixed evenly into products such as potatoes.

  And the manufacturing method of such a packaging bag includes a step of punching and forming a window hole in the base paper constituting the bag body, and a step of joining an inner pocket forming pocket piece from the inside of the base paper to the window hole, A cylinder forming process for forming the base paper into a cylindrical shape, and a cylindrical body obtained by the cylinder forming process is cut at one end side of the window hole to form a bag main body and an inner pocket inside the opening end of the bag main body And a bottom part molding step for molding the bottom part of the bag body.

  According to the above manufacturing method, using the window hole formed in the bag body and the film (pocket piece) attached to the inside, a concave window hole whose upper end is open to the opening edge is formed at the opening edge of the bag body And the film joined inside this window hole can also form an inner pocket using the film as a pocket piece by opening the opening edge side of the bag body. Therefore, a packaging bag with an inner pocket can be easily manufactured only by devising a cutting process using a conventional manufacturing facility for making a packaging bag with a window hole.

  When the pocket piece is joined to the window hole, the pocket piece is attached while being shifted from the window hole, and the opening edge position of the bag body is positioned higher than the upper end of the pocket piece in the cylindrical cutting process. The folding margin can be easily manufactured at the opening edge of the bag body.

  In addition, the pocket piece is made of a transparent synthetic resin film, so that a packaging bag with a transparent inner pocket can be provided by using a conventional manufacturing facility for making a packaging bag with a window hole. be able to.

  In addition, this invention is not limited to said embodiment, A change can be suitably added within the scope of the present invention. For example, as shown in FIG. 6, a configuration in which the upper end of the pocket piece 5 is disposed at the same position as the opening edge 3 without forming a bending allowance at the opening edge 3 of the bag body 2 can be adopted. Furthermore, in the said embodiment, although the aspect which glues a pocket piece was illustrated, it can join also by the aspect heat-sealed with a raw material.

D Folding allowance 1 Packaging bag 1A Base paper 1B Cylindrical body 2 Bag body 2a Side 2b Body 2c Bottom edge 3 Open edge 4 Window hole 5 Pocket piece 6 Small bag 7 Inner pockets 10a, 10b, 10c Fold 13 First fold Eye 14 Second crease 15 Third crease 16 Fourth crease 18 Bottom 19 Bottom piece

Claims (5)

A concave window hole whose upper end is open to the opening edge is formed at the opening edge of the bag body, and the upper end of the pocket piece is opened inside the window hole, and the left and right side portions and the bottom portion are joined to form an inner pocket. A packaging bag characterized by The packaging bag according to claim 1, wherein an upper end of the pocket piece is disposed at a position lower than an opening edge of the bag body, and the vicinity of the opening edge of the bag body can be folded back. A step of punching and forming a window hole in the base paper constituting the bag body, a step of joining a pocket piece for forming an inner pocket into the window hole from the inside of the base paper, and a cylinder forming step of forming the base paper into a cylindrical shape A cylindrical body cutting step in which the cylindrical body obtained in the cylinder making process is cut at one end side of the window hole to form a bag main body and an inner pocket is formed inside the opening end of the bag main body, and the bag main body And a bottom molding step for molding the bottom of the packaging bag. When joining the pocket piece to the window hole, the pocket piece is shifted from the window hole and pasted so that the opening edge position of the bag body is positioned higher than the upper end portion of the pocket piece in the cylindrical cutting process. The manufacturing method of the packaging bag of Claim 3 cut | judged. The said pocket piece is a manufacturing method of the packaging bag of Claim 3 or 4 which consists of a film made from a transparent synthetic resin.

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