JPH0427780Y2 - - Google Patents

Description

[Detailed description of the invention] Conventionally, folded pieces are formed on the top and bottom of a cylindrical body constituting a bag, projecting in a step-like manner from one side of the front and rear walls to the other side with steps on both side edges in a vertically symmetrical manner. Bags made by pasting these folded pieces with adhesive to close the opening and bottom have been widely developed. To take out the items stored in this type of bag, it is common to open the upper folded piece that forms the opening where the stored items are poured into the bag, and let the items flow out. Since it takes time to use the bag, the body of the bag is torn open and taken out immediately at the site, requiring a knife, and the bag cannot be recycled. For this reason, many ideas have been made to open the bottom by inserting strings into the bottom and pulling the strings, but depending on the position where the strings are inserted, an extremely large amount of force is required and it is not easy to do so. It is difficult to pull it up, and the bottom is constructed by simply folding it without applying glue, and only the decorative paper is glued, and strings are inserted to make it easier to remove the decorative paper. Although some of them have this structure, there is a problem with the strength of the bottom because no glue is used to form the bottom.

The present invention has pleats on both sides to facilitate opening without these various defects, and the top and bottom of the cylindrical body protrude in a step-like manner with steps on both sides symmetrically from one side of the front and back walls to the other. This is a multi-layered paper bag in which two folded pieces are arranged in a row, and the two folded pieces are pasted symmetrically to the front and rear walls to close the opening and the bottom. An adhesive is applied to the lower folded piece to be formed, and a release agent is applied to one of the front and rear walls to which the lower folded piece is bonded to form an overlapping folded bottom part, and a release material for opening is applied between the bottom part and the bag wall. This is a paper bag made by pasting decorative paper with

An example of its implementation will now be described in detail in conjunction with the drawings.

The outer layer paper 1 has a bottom protrusion b and a mouth cutout c formed approximately in the center, and step portions 5, 5, . . . Inner layer paper 2
The outer layer has a bottom protrusion b' and a corresponding opening cutout c' in the same shape as the outer layer, and is connected to this on the left and right, and staircase parts 5', 5', etc. are connected thereto. It is set up. The combination of the outer layer paper 1 and the inner layer paper 2 is stacked on top of each other in the front, back, right and left directions as a whole as shown in the developed view of FIG. , 3 and the triangular folding line d forming the air inlet 4 are provided. Therefore, to form the bag of the present invention, the folding lines 3a, 3b, and 3c of the developed view shown in FIG. Fold inward of the cylindrical body from the folding line d to form the air inlet 4, and then fold the upper and lower bent pieces 6, 7 of the cylindrical body.
are vertically and symmetrically pasted together from the E-I wire and the Ro-Ro wire to form a bag body with a mouth and a bottom.

The above is a conventionally widely used bag form. The present invention is characterized by its structure based on subsequent steps. In the perspective view shown in FIG. 4, adhesive 8 is applied to the inner surface of the bent piece 7 that forms the bottom part, and the bent piece is folded over the front wall 9 of the cylindrical body from the roller wire at the point where it is to be pasted. A release agent 10 is applied across the tube width of the cylindrical body with the same width as the bending width of the folded pieces, and the folded pieces are folded over and over to form the bottom part, and a decorative paper 1 with the same width as the tube width is applied.
1, glue an opening peeling material 12 made of a thin flat string or thick paper with the same length, and cut the decorative paper at positions corresponding to both sides of the peeling piece at the end of the decorative paper.
3 and 13, fold the ends 14 inward to form a double part 15, and then glue only the parts other than the peelable material so that the peelable material 12 touches the bent piece and the front wall. Step 16 is performed to form the laminated bottom portion 17. As the adhesive 8, a hot melt adhesive, a rubber adhesive, a polyvinyl acetate adhesive, etc. are used, and as the release agent 10, a silicone-containing phenolic resin, paraffin, wax, etc. are used. According to the present invention, the bottom is formed, a folded piece is folded back to the side wall of the bag, and a decorative paper is stuck over the folded piece and the side wall.

Therefore, in order to drain the stored items out of the bag, pinch the release material 12 of the double part 15 at the end of the decorative paper and pull it up in the direction of the arrow in FIG. The side to be peeled is not glued, and the decorative paper itself has score lines 13, 13 along both outer sides of the peeling material, so the entire bottom length of the decorative paper increases as the peeling material is pulled out. It will be broken. However, at this time, since the bottom portion of the folded piece is closed, tear debris from the decorative paper 11 will not get mixed into the bag. Furthermore, since the folded portion of the folded piece is coated with a release agent 10, it will not tear open.

Therefore, according to the present invention, the opening can be easily opened without using a knife, and compared to the case where the bottom is formed with conventional adhesive, there is less chance of paper dust etc. scattering into the stored items at the opening. do not have. Although the bottom part is coated with a release agent, the strength in the horizontal direction is sufficient, so the strength of the bottom part is maintained due to the synergistic effect with makeup, and the bag is free from any practical problems.

[Brief explanation of the drawing]

Fig. 1 is a developed view of the inner and outer paper layers of the present invention, Fig. 2 is a plan view of the developed view of Fig. 1 as a cylindrical body, and Fig. 3 is a plan view of the cylindrical body of Fig. 2. - A plan view of the opening and the bottom formed by bending the bent pieces symmetrically from the B line; FIG. 4 is a perspective view of forming the bottom of the present invention;
Figure 5 is a vertical cross-sectional view of the folded piece taken along line A--A in Figure 4, Figure 6 is a plan view of the decorative paper with the side to be pasted to the bottom of the bag facing upward, and Figure 7 is the finished product. Figure 8 is a plan view of the present invention in which the decorative paper is pasted to the bottom of the bag, Figure 9 is a perspective view showing the opening at the bottom, and Figure 10 is the bottom of Figure 9. - It is a longitudinal cross-sectional view taken along line B. In addition, each code in the figure is 1 for outer layer paper, 2 for inner layer paper,
3, 3 are fold parts, 3a, 3b, 3c are folding lines, 4 is an air inlet, 5, 5, 5, 5', 5', 5' are staircase parts,
6 and 7 are the upper and lower bent pieces, 8 is the adhesive, 9 is the front wall, 1
0 is a release agent, 11 is decorative paper, 12 is a release material for opening, 13, 13 is a cut line, 14 is an edge, 15 is a double part, 16 is glue, b, b' are bottom protrusions, c , c indicate the mouth defect, d indicates the folding line, and E-I and Rollo lines indicate the folding lines, respectively.

Claims (1)

[Scope of utility model registration request] A cylindrical body having pleats on both sides, and vertically symmetrical bent pieces protruding in a step-like manner with steps on both side edges from one side of the front and back walls to the other on the top and bottom of the cylindrical body, and forming an upper corner. An adhesive layer is formed on the inner surface of the folded piece forming the bottom in a multilayer paper bag which is folded inward to form an inlet and both folded pieces are pasted symmetrically to the front and rear walls to close the mouth and bottom. Add a layer of release agent to the wall of the bag at the target position, fold the folded pieces over and over to form the bottom, and glue only the area other than the release material so that the release material is in contact with the bottom of the bag and attach the decorative paper. An easy-to-open paper bag that is attached to the bottom of the bag.