paper bags

Abstract

We can provide paper bags that offer enhanced durability and convenience. [Solution] The paper bag 1 of this invention comprises a paper bag body 10, a pair of handles 31 attached to the paper bag body 10, and a pocket 40 provided inside the paper bag body 10. The paper bag body 10 has a cylindrical body portion 16 having a front portion 11, a rear portion 12, and left and right gusset portions 13, 14, and a bottom portion 17 that closes the lower end of the body portion 16. The handles 31 are attached to the upper part of the body portion 16. The paper material constituting the body portion 16 has a resin layer formed on its surface. The pocket 40 is located on the inner surface of the body portion 16 and is made of the same material as the paper material constituting the body portion 16.

Description

Technical Field

[0001] This invention relates to a paper bag for containing contents.

Background Art

[0002] Conventionally, paper bags with various structures have been proposed. For example, a paper bag has been proposed that includes a bottom portion, a front portion and a back portion that are continuously provided at the front edge and the rear edge of the bottom portion, and left and right side portions that are continuously provided at the left and right edges of the bottom portion and can be folded inward or outward, and can be folded compactly (see, for example, Patent Document 1). In the paper bag described in this Patent Document 1, a carrying hole for hand carrying is formed in the bag body of the paper bag. Also, as another form, a paper bag has been proposed that includes a separate handle instead of a carrying hole, and the handle is adhesively fixed to the upper portion of the bag body via a bonding member or an adhesive member.

[0003] Such conventional paper bags are basically premised on single use, that is, disposable use. Since they have a configuration with a carrying hole formed in the bag body or a configuration in which the handle is fixed by paper bonding, when containing relatively heavy objects or when used repeatedly for a long period of time, the paper is likely to tear from the carrying hole or the root portion of the handle, and there is a problem from the viewpoint of durability.

[0004] In recent lifestyles, small information terminals such as smartphones have become carry-on items. However, there is no dedicated storage space for storing small information terminals inside conventional paper bags, and they are mixed with other contents, making it difficult to quickly take them out of the paper bag.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] This invention was made to solve the above-mentioned problems and aims to provide a paper bag with improved durability and convenience. [Means for solving the problem]

[0007] This invention relates to a paper bag comprising a cylindrical main body having a front portion, a rear portion, and left and right gusset portions, a bottom portion that closes the lower end of the main body, and a handle attached to the upper part of the main body, wherein the paper material constituting the main body has a resin layer formed on its surface, and a pocket made of the same material as the paper material constituting the main body is provided on the inner surface of the main body. [Effects of the Invention]

[0008] This invention makes it possible to provide paper bags with enhanced durability and convenience. [Brief explanation of the drawing]

[0009] [Figure 1] A perspective view showing the structure of the paper bag according to this invention. [Figure 2] This diagram shows the paper bag body of the present invention in its unfolded state. [Figure 3] A perspective view showing the configuration of the pockets. [Figure 4] A diagram showing the pocket in its unfolded state. [Figure 5] A schematic cross-sectional view showing the structure of the bag opening. [Figure 6] A schematic cross-sectional view showing the bag opening in a closed state. [Modes for carrying out the invention]

[0010] Figure 1 is a perspective view showing the configuration of the paper bag 1 of the present invention. Figure 2 is an unfolded view showing the paper bag body 10 of the present invention in an unfolded state. Hereinafter, one embodiment of the present invention will be described in detail based on the drawings. As shown in Figure 1, the paper bag 1 of the present invention comprises a paper bag body 10 and a pair of handles 31 attached to the paper bag body 10.

[0011] The paper bag body 10 is composed of a front section 11, a rear section 12, a left gusset section 13, and a right gusset section 14, and has a rectangular tubular body section 16 and a bottom section 17 that closes the lower end opening of the body section 16. The upper end opening of the body section 16 (paper bag body 10) is open, and the upper end opening of the body section 16 (paper bag body 10) serves as the bag opening 18 for putting in and taking out the contents.

[0012] The paper bag body 10 is configured to stably hold the contents by receiving the contents through the opening 18, sandwiching the contents between the front portion 11 and the rear portion 12, and supporting the contents from below with the bottom portion 17.

[0013] The dimensions of each part of the paper bag body 10 can be arbitrarily set according to how the paper bag 1 is used. For example, the width and height dimensions of the front part 11, the width and height dimensions of the rear part 12, and the folding depth dimensions of the left and right gusset parts 13 and 14 can be arbitrarily set.

[0014] The paper bag body 10 is constructed using a rectangular paper material as shown in the unfolded diagram in Figure 2. The paper material (base material) for forming the paper bag body 10 is divided into a front section 11, a rear section 12, and left and right gusset sections 13 and 14, which constitute the main body section 16, and a bottom section 17 which is provided connected to the lower ends of the front section 11, the rear section 12, and the left and right gusset sections 13 and 14 of the main body section 16.

[0015] The portion for forming the bottom 17 in the paper material (base material) for forming the paper bag body 10 is formed by a plurality of portions extending from the lower ends of the front surface portion 11, the rear surface portion 12, and the left and right gusset portions 13, 14 of the main body portion 16 being folded over each other. Therefore, a plurality of cut portions are provided at predetermined positions.

[0016] Also, the dotted line shown in FIG. 2 indicates a folding line (valley fold line). Specifically, folding lines are provided at the lower parts of the gusset portions 13, 14 and the rear surface portion 12. By valley-folding this folding line, the paper bag body 10 can be folded flat when not in use (non-use time). Also, when accommodating contents such as articles (during use), the bag opening 18 can be opened so that the front surface portion 11 and the rear surface portion 12 are separated from each other.

[0017] As the paper material constituting the paper bag body 10, a paper material having a predetermined rigidity and tear strength that can withstand repeated use can be used. For example, as the paper material, art paper with a basis weight (weight per unit area) of 190 g / m 2 can be used. In addition to art paper with a basis weight of 190 g / m 2 it is also possible to adopt other paper materials having the same strength and texture. For example, as the paper material, art paper or coated paper in the range of a basis weight of 150 g / m 2 or more and 250 g / m 2 or less can be used. Also, as the paper material, single-sided kraft paper, bleached kraft paper, or unbleached kraft paper in the range of a basis weight of 120 g / m 2 or more and 180 g / m 2 or less can be used. Since these have long fibers as the main component, they particularly contribute to an improvement in tear strength. Furthermore, as the paper material, fancy paper having a design texture and high rigidity in the material itself can be adopted. Furthermore, as the paper material, it is also possible to adopt synthetic paper that has the same printing and processing suitability as paper while using a synthetic resin such as polypropylene as the main raw material.

[0018] In addition, on the surface of the paper material of the present embodiment, a resin layer formed by various resin treatments is formed as a protective layer for improving the durability of the paper bag body 10 (paper bag 1). As the resin layer, for example, a polypropylene layer can be used. Further, as the configuration of the resin layer, a non-glossy polypropylene layer can be used. More specifically, as the configuration of the resin layer, it can be a matte (mat-like) polypropylene layer (mat PP laminate layer) having a thickness in the range of 15 μm or more and 30 μm or less and having a fine diffuse reflection structure on the surface.

[0019] Note that the resin layer is not limited to the above, and a resin layer using a known resin material can be adopted. For example, a polypropylene layer having a smooth glossy surface can be adopted on the surface of the paper material. Also, it is possible to use a polyethylene terephthalate layer having higher hardness and transparency than polypropylene. It is also possible to adopt a water-resistant cured resin film closely fixed to the surface of the paper material. This resin film is formed, for example, by a UV-cured resin or the like.

[0020] In addition, the surface of the paper material may not be flat, and regular or irregular fine concavo-convexities (concavo-convex structure: emboss structure) may be formed. As the form of the specific concavo-convex pattern, there is no need to limit it to a specific one, and leather-like, linen / canvas-like, silk-like, sand-like, stripe-like, or lattice-like three-dimensional shapes can be used.

[0021] As a specific example, as the concavo-convex structure, it can be a sappiano-like embossed structure in which fine stripe patterns intersect in a lattice pattern. This sappiano-like structure is composed of a plurality of inclined convex ridges intersecting each other and fine concave portions surrounded by them. These concavo-convex structures are not merely patterns by printing but are configured as physical undulations on the sheet surface. Therefore, a unique texture can be felt when touched by hand, and it also has a visual effect of dispersing light reflection.

[0022] As shown in Figures 1 and 2, a pair of through holes 110 and 120 are drilled horizontally along the edge of the bag opening 18 near the top of the front portion 11 and the rear portion 12, respectively. Each pair of through holes 110 and 120 is positioned opposite to the other. An annular eyelet 32 ​​is fitted into each of these four through holes 110 and 120. The eyelet 32 ​​is an annular member made of metal or hard resin and is fixed to the periphery of the through holes 110 and 120 from both the front and back surfaces of the front portion 11 and the rear portion 12.

[0023] The handle 31 is made of a flexible cloth string (linear or strip-shaped member). Both ends of this cloth string are inserted from the outside to the inside of the front 11 and rear 12 into a pair of eyelets 32 (through holes 110, 120) provided on the front 11 and rear 12. A knot (not shown) larger than the inner diameter of the eyelets 32 is formed at both ends of the cloth string. Therefore, the knots at both ends of the cloth string are locked inside the eyelets 32, thereby locking the handle 31 to the paper bag body 10. With this configuration, the paper bag body 10 can be lifted by lifting the handle 31.

[0024] The fabric cord that makes up the handle 31 is a flexible fiber aggregate made of woven or knitted natural or synthetic fibers. For example, a cotton ribbon formed into a strip by plain weave or twill weave can be used as a component of the handle 31. This cotton ribbon is suitable as a component of the handle 31 because it has a moderate thickness and flexibility, and also has excellent tensile strength in the longitudinal direction.

[0025] Furthermore, magnetic member attachment areas 111 and 121 are provided near the upper parts of the front portion 11 and the rear portion 12. Magnetic member attachment area 111 is located between a pair of through holes 110, and magnetic member attachment area 121 is located between a pair of through holes 120. Magnetic member attachment areas 111 and 121 are located opposite each other.

[0026] As shown in Figures 3 and 4, a pocket 40 is provided inside the paper bag body 10. The pocket 40 is located on the inner surface of the main body 16, and in this embodiment, on the upper inner surface of the rear section 12.

[0027] The pocket 40 is made of the same paper material as the main body 16. The pocket 40 has valley fold lines 41 formed on the left and right gussets and adhesive surfaces 42 formed on both the left and right side edges and the bottom edge. The adhesive surfaces 42 provided on both the left and right side edges and the bottom edge are attached to the inner surface of the rear part 12 (main body 16) via appropriate adhesive members. As a result, a storage space with an open top is formed between the inner wall surface of the rear part 12 and the pocket 40.

[0028] Pocket 40 is designed to have a width and depth slightly larger than the external dimensions of a typical smartphone. For example, Pocket 40 is designed to have a height (top to bottom) in the range of 160mm to 200mm, a width (left to right) in the range of 80mm to 120mm, and a depth (front to back) in the range of 15mm to 30mm. A pocket of this size can accommodate various items in addition to small information terminals such as smartphones, such as business card holders, notebooks, and card cases.

[0029] Furthermore, as shown in Figures 1 and 3, magnetic members 50 that can be attracted to each other by magnetic force are provided on the upper part of the front portion 11 and the rear portion 12 (near the opening of the bag 18).

[0030] The magnetic member 50 includes a first magnetic member 51 provided on the front portion 11, a second magnetic member 52 provided on the rear portion 12, and a third magnetic member 53 which is a separate member from the first magnetic member 51 and the second magnetic member 52 and is provided on either the front portion 11 or the rear portion 12.

[0031] Figure 5 is a schematic cross-sectional view showing the configuration of the bag opening 18. Figure 6 is a schematic cross-sectional view showing the bag opening 18 in a closed state. As shown in Figures 5 and 6, in this embodiment, the upper ends of the front portion 11 and the rear portion 12 are folded inward toward the inside of the bag, thereby forming folded portions 112 and 122 with a substantially U-shaped cross-section. The first magnetic member 51 is positioned on the folded portion 112 of the front portion 11. Similarly, the second magnetic member 52 is positioned on the folded portion 122 of the rear portion 12. The third magnetic member 53 is attached to the surface facing the inner cavity of the paper bag 1 at the folded portion 122 of the rear portion 12. That is, the third magnetic member 53 is positioned on top of the folded portion 122 that encloses the second magnetic member 52, and is exposed to the inside of the paper bag 1.

[0032] Furthermore, the first magnetic member 51, the second magnetic member 52, and the third magnetic member 53 are each positioned opposite to each other (magnetic member attachment areas 111, 121), the second magnetic member 52 and the third magnetic member 53 are positioned in a direction that attracts each other, and the first magnetic member 51 and the third magnetic member 53 are positioned in a direction that attracts each other.

[0033] Therefore, the bag opening 18 can be closed by the mutual magnetic force between the first magnetic member 51, the second magnetic member 52, and the third magnetic member 53.

[0034] As described above, according to this invention, the paper material constituting the paper bag body 10 has a resin layer formed on its surface. Therefore, the durability of the paper bag body 10 (body portion 16) and, consequently, the entire paper bag 1 can be increased. Furthermore, according to this invention, a pocket 40 made of the same paper material as the paper material constituting the body portion 16 is provided on the inner surface of the body portion 16. Therefore, it is convenient to store specific items in the paper bag 1 without mixing them with other items. For example, by storing a small information terminal such as a smartphone in the pocket 40, specific items can be stored separately from other items, and specific items can be quickly removed from the paper bag 1. As described above, according to this invention, it is possible to provide a paper bag 1 with enhanced durability and convenience.

[0035] Furthermore, according to this invention, annular eyelets 32 are fitted into through holes 110 and 120 drilled near the upper part of the front portion 11 and the rear portion 12, respectively, and the handle 31 is made of a cloth string inserted through the eyelets 32. Therefore, compared to conventional configurations with handle holes formed in the bag body or configurations in which the handle is fixed by laminating paper, the strength and durability can be improved.

[0036] Furthermore, according to this invention, by using a synthetic resin layer such as a mat-shaped polypropylene layer for the resin layer, softening due to moisture absorption of the main body 16 is prevented, and frictional deterioration due to repeated use is suppressed. In addition, because this synthetic resin layer is integrated with the paper material, the bending rigidity of the main body 16 is improved. As a result, even when relatively heavy items such as smartphones are stored in the pocket 40, the shape of the main body 16 (paper bag 1) is maintained.

[0037] Furthermore, according to this invention, since an uneven structure is formed on the surface of the paper material, fine scratches that occur during use are visually concealed. In addition, when all or part of the main body 16 is folded, this uneven structure has the function of dispersing and absorbing the distortion. As a result, tearing of the main body 16 at the fold is suppressed, and durability that can withstand long-term reuse is achieved.

[0038] Furthermore, according to this invention, the basis weight is 190 g / m². 2 By employing art paper or similar high-basis-weight paper as the paper material, sufficient rigidity is ensured around the through-holes 110 and 120 where the eyelets 32 are attached, allowing the crimped portion of the eyelets 32 to be firmly held in place. As a result, even when relatively heavy items are placed inside the paper bag 1, the eyelets 32 are prevented from falling off or tearing from the surrounding area. This is the rigidity-enhancing effect achieved by the unique combination of paper material thickness and eyelet structure of this invention.

[0039] Furthermore, according to this invention, since magnetic members 50 that can attract each other by magnetic force are provided on the upper parts of the front portion 11 and the rear portion 12, the bag opening 18 can be easily closed by the action of magnetism, which is superior in terms of convenience.

[0040] Furthermore, according to the present invention, the magnetic member 50 has a first magnetic member 51 provided on the front portion 11, a second magnetic member 52 provided on the rear portion 12, and a third magnetic member 53 which is a separate member from the first magnetic member 51 and the second magnetic member 52 and is provided on either the front portion 11 or the rear portion 12. As a result, the magnetic force when closing the bag opening 18 can be increased, and even when relatively heavy contents are stored, the bag opening 18 can be kept closed.

[0041] The paper bag of this invention corresponds to the paper bag 1 of the above embodiment, and similarly, the front part corresponds to the front part 11, the rear part corresponds to the rear part 12, the left and right gussets correspond to the left and right gussets 13 and 14, the main body corresponds to the main body 16, the bottom part corresponds to the bottom part 17, the handle corresponds to the handle 31, the pocket corresponds to the pocket 40, the through holes correspond to the through holes 110 and 120, the eyelets correspond to the eyelets 32, the magnetic members correspond to the magnetic members 50, the first magnetic member corresponds to the first magnetic member 51, the second magnetic member corresponds to the second magnetic member 52, and the third magnetic member corresponds to the third magnetic member 53. However, this invention is not limited to this embodiment and can take various other forms. Furthermore, the specific configurations and other details listed in the above embodiment are just examples and can be modified as appropriate according to the actual product. [Industrial applicability]

[0042] This invention can be used in the paper bag manufacturing industry. [Explanation of symbols]

[0043] 1...Paper bag 10...Bag body 11...Front part 110…Through hole 111... Area for attaching magnetic material 12...Rear section 120... Through hole 121… Area for attaching magnetic material 13, 14... Town section 16...Main body 17...bottom 18… Upper opening 31...Handle 32… Eyelet 40…Pocket 50...Occluded part 51…First magnetic member 52…Second magnetic element 53…Third magnetic element

Claims

1. A paper bag comprising a cylindrical main body having a front section, a rear section, and left and right gusset sections, a bottom section that closes the lower end of the main body, and a handle attached to the upper part of the main body, The paper material constituting the main body has a resin layer formed on its surface. The inner surface of the main body is provided with a pocket made of the same material as the paper material that constitutes the main body. paper bag.

2. The upper parts of the front and rear portions are provided with a pair of through holes and eyelets fitted into the through holes, respectively. The handle is characterized by being made of a cloth string inserted through the eyelet. The paper bag according to claim 1.

3. The aforementioned paper material is characterized in that an uneven surface structure is formed on its surface. The paper bag according to claim 1 or 2.

4. The resin layer is characterized by being a polypropylene layer. The paper bag according to claim 3.

5. The aforementioned paper material has a basis weight of 190 g / m². ２ The above materials are characterized by The paper bag according to claim 4.

6. A magnetic member capable of attracting each other by magnetic force is provided on the upper part of both the front and rear portions. The paper bag according to claim 5.

7. The magnetic member is characterized by comprising a first magnetic member provided on the front portion, a second magnetic member provided on the rear portion, and a third magnetic member, which is a member separate from the first and second magnetic members and provided on either the front portion or the rear portion. The paper bag according to claim 6.

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