Paper bag

Abstract

The utility model discloses a paper bag, which belongs to the technical field of packaging bags and comprises a bag body and two handles connected to an opening of the bag body, the bag body is provided with a containing cavity, a folding edge folded towards the inside of the containing cavity is formed on the periphery of the opening of the bag body, and an inward folding indentation is formed on the bottom surface of the bag body. And the bottom surface of the bag body in the folded state is inwards folded towards the accommodating cavity along the inwards-folding indentation. Moreover, notches are formed in the positions, corresponding to the two free ends of each handle, of the folded edges on the two opposite sides of the paper bag respectively, and the free ends of the handles extend into the notches from the inner side of the opening of the bag body, extend to the positions between the folded edges and the side walls of the bag body and are fixedly connected with the inner surfaces of the folded edges and the inner surfaces of the side walls of the bag body. The free ends of the handles of the paper bag extend from the notches to the positions between the folded edges and the bag body, so that the free ends of the handles are fixedly connected with the inner surfaces of the folded edges and the inner surfaces of the side walls of the bag body, and the connection strength between the bag body and the handles is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging bags, and particularly relates to a paper bag. Background Art

[0002] A shopping bag is a common packaging container, usually having two handles for easy carrying by hand. With the improvement of environmental awareness, more and more enterprises and consumers have started to pay attention to the environmental performance of shopping bags. Paper shopping bags are favored because of their recyclable characteristics. Paper shopping bags are widely used in various fields, including retail, gift packaging, business activities, etc. In the retail industry, shopping bags are indispensable shopping aids; in the field of gift packaging, exquisite shopping bags can enhance the grade and sense of value of gifts; in business activities, customized shopping bags have become an important means for enterprises to promote their brand images.

[0003] The handle of the paper bag, as the main part for carrying, the connection strength between it and the bag body directly determines the load-bearing capacity of the paper bag. High-strength connection can ensure that the paper bag is not easily broken or detached when loading heavy objects, thus meeting the requirements in various usage scenarios. Therefore, the connection strength between the handle and the bag body of the paper bag is directly related to the usage performance, safety and user experience of the paper bag. In the prior art, the handle and the bag body of the paper bag are generally fixedly connected by means such as perforating and knotting, glue pasting, hot melt adhesive fixing, etc. For example, the Chinese patent document (patent number: CN211996875U) discloses a double-sided middle-sealed M-bottom three-dimensional paper bag. The handle of this paper bag is first fixed at the free end on a sheet-shaped handle piece, and then the sheet-shaped handle piece is adhered to the inner side of the bag body, so as to enhance the connection strength between the handle and the bag body of the paper bag by using the handle piece.

[0004] However, in order to increase the connection strength between the bag body and the handle, this kind of bag body needs to additionally provide a handle piece adapted to the free end of the handle, which not only increases the production cost of the paper bag, but also may generate redundant paper waste for cutting the handle piece, resulting in waste of paper. Further, the production process of the above-mentioned prior art paper bag is relatively complex, the process of making the paper bag is cumbersome, the production efficiency is very low, and the rejection rate is relatively high. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the technical problems in the prior art that in order to increase the connection strength between the bag body and the handle, the bag body needs to additionally provide a handle piece adapted to the free end of the handle, thereby increasing the production cost of the paper bag, and for cutting the handle piece, redundant paper waste may be generated, resulting in waste of paper, as well as the complex production process and low production efficiency.

[0006] To solve the above technical problems, an embodiment of the present utility model discloses a paper bag. This paper bag includes a bag body having an accommodating cavity. A hem is formed at the peripheral edge of the opening of the bag body, which is folded inwardly towards the inside of the accommodating cavity. And an inner folding crease is formed at the bottom surface of the bag body. The bottom surface of the bag body in the folded state is folded inwardly towards the accommodating cavity along the inner folding crease.

[0007] Moreover, a pair of handles are provided on opposite sides of the opening of the bag body. Cuts are respectively formed at positions on the hems on opposite sides of the opening of the bag body corresponding to the free ends of the handles. The free end of each handle extends into the corresponding cut from the inside of the opening of the bag body, extends between the hem and the side wall of the bag body, and is fixedly connected to the inner surface of the hem and the inner surface of the side wall of the bag body.

[0008] With the above technical solution, this paper bag forms a hem that is folded inwardly towards the accommodating cavity at the peripheral edge of the opening of the bag body, thereby increasing the structural strength at the opening of the bag body. Further, the cuts formed on the hem of this paper bag ingeniously enable the free end of the handle to extend from the cut between the hem and the bag body, so that the free end of the handle is not only fixedly connected to the inner surface of the hem but also fixedly connected to the inner surface of the side wall of the bag body, thus ensuring the connection strength between the bag body and the handle. Compared with the handle in the prior art that is connected between the outer surface of the hem and the fixed paper, this paper bag does not require an additional fixed paper, reducing the production cost and not causing waste of paper. At the same time, compared with the cumbersome steps of first fixing the free end on a sheet-shaped handle and then pasting the sheet-shaped handle to the inner side of the bag body, this paper bag only needs to pass the handle through the cut and fix it on the hem, then fold the hem and fix the free end of the handle together on the bag body, simplifying the forming process of the paper bag, reducing the process difficulty, and thus improving the yield.

[0009] Moreover, the bottom surface of this bag body can be folded inwardly towards the accommodating cavity along the inner folding crease so that the bag body is in a folded state, thus facilitating the storage of the paper bag.

[0010] An embodiment of the present utility model also discloses a paper bag. The cut includes a main cut and auxiliary cuts connected to both ends of the main cut. The length of the main cut is adapted to the width of the cross-section of the handle. And the auxiliary cuts on both sides of the main cut extend respectively along an inclined direction relative to the extending direction of the main cut.

[0011] With the above technical solution, the length of the main cut is adapted to the width of the cross-section of the handle, enabling the free end of the handle to extend into the cut and be more firmly assembled with the main cut. And the auxiliary cuts on both sides of the main cut extend respectively along an inclined direction relative to the extending direction of the main cut, so that the cut can open a certain degree on the surface of the hem, facilitating the free end of the handle to extend between the hem and the side wall of the bag body and reducing the difficulty of the production process.

[0012] An embodiment of the present utility model also discloses a paper bag, wherein the extending direction of the auxiliary incision is inclined outward away from the opening of the bag body relative to the extending direction of the main incision, and the inclination angle of the extending direction of the auxiliary incision relative to the extending direction of the main incision is in the range of 100° to 145°.

[0013] Adopting the above technical solution, the inclination angle of the extending direction of the auxiliary incision relative to the extending direction of the main incision is within the above range. On the one hand, it is beneficial for the incision to open a larger opening on the surface of the folded edge, thereby forming a through hole. Not only can the free end of the handle extend into the through hole, but also the tooling for pulling the free end of the handle can extend into the through hole, further reducing the difficulty of the production process. On the other hand, it avoids the risk of shaking when the free end of the handle extends into the incision, ensuring the assembly accuracy between the free end of the handle and the incision.

[0014] An embodiment of the present utility model also discloses a paper bag, wherein the incision as a whole is in the shape of "︹", and the incision as a whole is symmetrical with respect to the midline of the main incision.

[0015] Adopting the above technical solution, for the incision in the shape of "︹", when the free end of the handle passes through the through hole opened by the incision, the opening degree of the main incision in the length direction is the same, which is beneficial for the accurate assembly of the free end of the handle and the main incision.

[0016] An embodiment of the present utility model also discloses a paper bag, wherein the extending direction of the main incision is parallel to the extending direction of the crease of the folded edge.

[0017] Adopting the above technical solution, the extending direction of the free end of the handle extending into the main incision is perpendicular to the extending direction of the main incision, and the extending direction of the main incision is parallel to the extending direction of the crease of the folded edge, so that the extending direction of the free end of the handle extending into the main incision is perpendicular to the extending direction of the crease of the folded edge. Thus, when the handle bears the weight from the bag body, the acting force on the handle is transmitted along the axial direction of the handle to the holding part, reducing the risk of the free end of the handle moving along the length direction of the incision and reducing the risk of the end of the incision being torn by the handle.

[0018] An embodiment of the present utility model also discloses a paper bag, wherein the distance between the main incision and the crease of the folded edge is in the range of 0 mm to 5 mm.

[0019] Adopting the above technical solution, the distance between the main incision and the crease of the folded edge is within the above range, so that when the paper bag is loaded with heavy objects, the handle receives uniform acting forces from the bag body and the folded edge, reducing the acting force of the handle pulling the folded edge in the direction close to the accommodating cavity, ensuring the connection stability between the folded edge and the bag body, and extending the service life of the paper bag.

[0020] An embodiment of the present utility model also discloses a paper bag, and the free end of each handle extends into the corresponding cut from the inner side of the opening of the bag body and extends in a direction away from the opening of the bag body.

[0021] Alternatively, the free end of each handle extends into the corresponding cut from the inner side of the opening of the bag body and is folded and extends towards the opening of the bag body.

[0022] By adopting the above technical solution, the part of the free end of the handle extending between the side and the bag body can be better connected to the inner surface of the side wall of the bag body and the inner surface of the hem, thereby increasing the connection strength between the handle and the bag body.

[0023] An embodiment of the present utility model also discloses a paper bag, and the free end of the handle is adhesively fixed to the inner surface of the hem through a first bonding part, and the inner surface of the hem and the inner surface of the side wall of the bag body are adhesively fixed through a second bonding part.

[0024] By adopting the above technical solution, both between the paper bag and the free end of the handle and between the free end of the handle and the hem are adhesively fixed by bonding parts, ensuring the connection strength between the bag body and the handle, and the connection method of adhesive bonding by the bonding parts will not damage the self-structures of the bag body and the handle, thereby ensuring the structural strength at the connection part of the bag body and the handle.

[0025] An embodiment of the present utility model also discloses a paper bag, and the paper bag further includes a fastener penetrating through the bag body, the free end of the handle and the hem.

[0026] By adopting the above technical solution, the fastener penetrating through the bag body, the free end of the handle and the hem can increase the connection strength between the free end of the handle and the hem and the bag body, and further improve the load-bearing capacity of the paper bag.

[0027] An embodiment of the present utility model also discloses a paper bag, and one end of the fastener has an end cap, and the end cap abuts against the outer surface of the side wall of the bag body.

[0028] By adopting the above technical solution, the end cap at one end of the fastener, on the one hand, can press the bag body, the free end of the handle and the hem to ensure the assembly stability among the three; on the other hand, the outer surface of the end cap can also be coated with a pattern to increase the aesthetics of the paper bag.

[0029] An embodiment of the present utility model also discloses a paper bag, and the handle is set to be an arc-shaped structure with a sheet-like or flat cross-section at least at the free end.

[0030] Moreover, the handle is made of any one of woven fabric, paper material or paper-like material.

[0031] With the above technical solution, the handle of the arc structure is beneficial to the holding of the hand. Moreover, the cross-section of the handle is sheet-like or flat at least at the free end, which is beneficial for the free end of the handle to extend into the incision on the hem. In addition, the handle made of woven fabric, paper material or paper-like material has high structural strength, which can ensure that the handle of the paper bag is not easily broken or detached when loading heavy objects.

[0032] An embodiment of the present invention also discloses a paper bag, in which a pair of opposite sides are arranged in the thickness direction of the accommodating cavity, and a pair of connecting surfaces are arranged between the pair of sides.

[0033] Wherein, connecting parts extending outwards are respectively arranged on both sides of each side, creases are formed at the parts where the edge of the side is connected to the connecting part on each side, and the connecting parts of the two side edges of the pair of sides are respectively overlapped and bonded together to form a pair of connecting surfaces.

[0034] Creases are formed at the parts where the bottom ends of the pair of sides are connected to the bottom surface.

[0035] The bottom ends of the pair of connecting surfaces are respectively connected to the bottom surface through a pair of bottom flanges. The bottom flanges are formed at the two side edges of the bottom surface and are folded towards the inside of the accommodating cavity, and the outer wall surface of the bottom flange is bonded to the inner wall surface of the corresponding connecting surface.

[0036] Moreover, each connecting surface is provided with a crease that is folded towards the inside of the accommodating cavity in the middle of the thickness direction of the accommodating cavity.

[0037] The inner folding indentation of the bottom surface includes a main indentation that is parallel to the side surface in the middle of the thickness direction of the accommodating cavity, and auxiliary indentations that respectively extend obliquely from the corner parts of the bottom surface towards the main indentation.

[0038] With the above technical solution, the bag body has high structural strength. When squeezing the two sides along the width direction, the two sides of the bag body are folded from the connection part of the connecting surface, and the bottom surface of the bag body is folded towards the inside of the accommodating cavity from the main indentation and the auxiliary indentation, so that the paper bag is in a folded state. There are no folding marks on the two sides of the paper bag, which will not affect the printing of various patterns on the side, and the side of the paper bag can meet various pattern designs.

[0039] The beneficial effects of the present invention are as follows:

[0040] The present utility model discloses a paper bag, which comprises a bag body and two handles connected to the opening of the bag body. The bag body has a receiving cavity. A hem is formed on the periphery of the opening of the bag body, which is turned inwardly towards the receiving cavity. An inner folding crease is formed on the bottom surface of the bag body. The bottom surface of the bag body in the folded state is folded inwardly towards the receiving cavity along the inner folding crease. Moreover, on the hems located on the opposite sides of the paper bag, cuts are respectively formed at positions corresponding to the two free ends of each handle. The free end of each handle extends into the cut from the inner side of the opening of the bag body, and extends to between the hem and the side wall of the bag body, and is fixedly connected to the inner surface of the hem and the inner surface of the side wall of the bag body. The cuts formed on the hems of this paper bag ingeniously enable the free ends of the handles to extend from the cuts to between the hem and the bag body, so that the free ends of the handles are not only fixedly connected to the inner surface of the hem, but also fixedly connected to the inner surface of the side wall of the bag body, thereby ensuring the connection strength between the bag body and the handles. Description of the Drawings

[0041] Figure 1 Fig. is a schematic structural view of the paper bag provided by the embodiment of the present utility model in the unfolded state;

[0042] Figure 2 Fig. is a schematic structural view of the paper bag provided by the embodiment of the present utility model in the folded state;

[0043] Figure 3 Fig. is a schematic structural view of the handle of the paper bag provided by the embodiment of the present utility model at the cut of the hem;

[0044] Figure 4 Fig. is another schematic structural view of the handle of the paper bag provided by the embodiment of the present utility model at the cut of the hem;

[0045] Figure 5 Fig. is still another schematic structural view of the handle of the paper bag provided by the embodiment of the present utility model at the cut of the hem;

[0046] Figure 6 Fig. is a cross-sectional view of the handle of the paper bag provided by the embodiment of the present utility model at the cut of the hem;

[0047] Figure 7 Fig. is a schematic structural view of the paper bag provided by the embodiment of the present utility model provided with a fastener;

[0048] Figure 8 Fig. is a cross-sectional view of the handle of the paper bag provided by the embodiment of the present utility model provided with a fastener at the cut of the hem;

[0049] Figure 9 Fig. is a schematic structural view of the unformed paper of the paper bag provided by the embodiment of the present utility model.

[0050] Reference Signs

[0051] 10. Paper bag;

[0052] 100. Bag body;

[0053] 110. Hem; 111. Cut; 112. Main cut; 113. Auxiliary cut; 114. Opening crease;

[0054] 120. Bottom surface; 121. Inner folding indentation; 122. Main indentation; 123. Auxiliary indentation; 124. Bottom flanging;

[0055] 130. Side surface; 131. Connecting surface; 132. Connecting part; 133. Bottom edge crease; 134. Side edge crease;

[0056] 135. Connecting surface crease;

[0057] 200. Handle; 210. Free end;

[0058] 300. Fastener; 310. End cap. Detailed implementation manner

[0059] A shopping bag is a common packaging container, usually having two handles for easy carrying by hand. The connection strength between the handle of the shopping bag and the bag body plays a crucial role in the overall performance and service life of the shopping bag.

[0060] A high-strength connection can ensure that the shopping bag remains stable when loaded with heavy objects, avoiding the scattering of items or damage to the bag body due to the breakage of the connection. This is particularly important for consumers who need to carry heavy objects (such as books, documents, shopping items, etc.). A shopping bag with insufficient connection strength is prone to handle detachment or breakage during frequent use, which not only affects the appearance but also greatly reduces the service life of the shopping bag. In addition, a high-strength connection enables the shopping bag to maintain good integrity after experiencing multiple external forces such as lifting and squeezing, thereby enhancing the durability of the shopping bag.

[0061] In the prior art, in order to ensure the connection strength between the handle of the paper bag and the bag body, the handle of the paper bag and the bag body are generally fixed and connected by means such as perforation and knotting, glue pasting, and hot melt adhesive fixation. When the handle is fixed by glue pasting, usually the free end of the handle is first fixed on the handle piece, and then the sheet-shaped handle piece is fixed to the bag body, so as to ensure the connection strength between the handle of the paper bag and the bag body. However, in order to increase the connection strength between the bag body and the handle, this kind of bag body needs to additionally provide a handle piece adapted to the free end of the handle, thereby increasing the production cost of the paper bag, and in order to cut the handle piece, there may be excess paper waste, resulting in waste of paper. Further, the production process of the above-mentioned paper bag in the prior art is relatively complex, the process of making the paper bag is cumbersome, the production efficiency is very low, and the rejection rate is relatively high.

[0062] To this end, the present utility model provides a paper bag. At the edge of the opening of the bag body of this paper bag, a hem is formed that folds inward towards the accommodating cavity to increase the structural strength of the opening. Further, a cut is formed on the hem so that the free end of each handle extends into the cut from the inner side of the opening of the bag body, and extends between the hem and the side wall of the bag body, and is fixedly connected to the inner surface of the hem and the inner surface of the side wall of the bag body, thereby increasing the connection strength between the bag body and the handle. Moreover, an inner folding crease is formed on the bottom surface of the bag body. The bottom surface of the bag body in the unfolded state folds inward along the inner folding crease towards the accommodating cavity so that the bag body is in a folded state, which is conducive to the storage of the paper bag.

[0063] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will further describe the embodiments of the present utility model in detail with reference to the accompanying drawings.

[0064] As Figures 1 - 2 、 Figure 9 shown, an embodiment of the present utility model discloses a paper bag 10. This paper bag 10 includes a bag body 100 having an accommodating cavity. A hem 110 that folds inward towards the inner side of the accommodating cavity is formed on the peripheral edge of the opening of the bag body 100. Moreover, an inner folding crease 121 is formed on the bottom surface 120 of the bag body 100. The bottom surface 120 of the bag body 100 in the folded state folds inward along the inner folding crease 121 towards the accommodating cavity.

[0065] In addition, a pair of handles 200 are provided on opposite sides of the opening of the bag body 100. Cuts 111 are respectively formed at positions on the hems 110 on opposite sides of the opening of the bag body 100 corresponding to the free ends 210 of the handles 200. The free end 210 of each handle 200 extends into the corresponding cut 111 from the inner side of the opening of the bag body 100, extends between the hem 110 and the side wall of the bag body 100, and is fixedly connected to the inner surface of the hem 110 and the inner surface of the side wall of the bag body 100.

[0066] This paper bag 10 forms a hem 110 that folds inward towards the accommodating cavity at the peripheral edge of the opening of the bag body 100, thereby increasing the structural strength of the opening of the bag body 100. Further, this paper bag 10 cleverly forms a cut 111 on the hem 110, enabling the free end 210 of the handle 200 to extend from the cut 111 between the hem 110 and the bag body 100, so that the free end 210 of the handle 200 is not only fixedly connected to the inner surface of the hem 110 but also fixedly connected to the inner surface of the side wall of the bag body 100, thereby ensuring the connection strength between the bag body 100 and the handle 200. Compared with the prior art where the paper bag 10 is connected to the handle between the outer surface of the hem 110 and the fixed paper, this paper bag 10 does not require an additional fixed paper, reducing the production cost and not causing waste of paper.

[0067] And, as Figure 1 shown, the accommodation cavity formed within the bag body 100 in the unfolded state is for storing items. The bottom surface 120 of such a bag body 100 can be folded inwardly towards the accommodation cavity along the inner folding crease 121, so that the bag body 100 is in the folded state as Figure 2 shown, thus facilitating the storage of the paper bag 10.

[0068] Next, the connection structure between the bag body 100 and the handle 200 will be described.

[0069] It should be noted that the connection structure of each handle 200 on the paper bag 10 to the bag body 100 is the same. For the sake of easy understanding, taking one handle 200 as an example, the function of the handle 200 is to facilitate the user to hold or hang by hand. When the shopping bag contains heavy items, the design of the handle 200 can provide a stable holding point. Therefore, the connection strength between the handle 200 and the bag body 100 directly determines the load-bearing capacity of the paper bag 10.

[0070] As Figure 1 and Figure 2 shown, in this embodiment, the handle 200 is set as an arc-shaped structure with a sheet-like or flat cross-section. The arc-shaped handle 200 is beneficial for the hand to hold. Moreover, the cross-section of the handle 200 is sheet-like or flat, which is conducive to the free end 210 of the handle 200 extending into the cut 111 on the folded edge 110. And, the handle 200 is made of any one of woven fabric, paper material or paper-like material, so that the handle 200 has a high structural strength and can ensure that the handle 200 is not easily broken or detached when the paper bag 10 is loaded with heavy objects.

[0071] Of course, the handle 200 can also only have a connecting piece with a sheet-like or flat cross-section at the free end 210, while the main body of the handle 200 adopts an arc-shaped structure with a cylindrical or elliptical cross-section. The main body of such a handle 200 adopts a cord-like structure and has a high structural strength, while the connecting piece at the free end 210 is convenient for extending into the cut 111 of the folded edge 110 to ensure the connection strength between the handle 200 and the bag body 100.

[0072] In this embodiment, the incision 111 on the hem 110 includes a main incision 112. The length of the main incision 112 is adapted to the width of the cross-section of the handle 200, so that the free end 210 of the handle 200 extends into the incision 111 and can be more firmly assembled with the main incision 112. Moreover, at both ends of the main incision 112, auxiliary incisions 113 are respectively formed and extend along an inclined direction with respect to the extending direction of the main incision 112, so that the incision 111 can be opened to a certain extent along the auxiliary incisions 113 on both sides of the surface of the hem 110, so as to form a through hole at the incision 111, facilitating the insertion of the free end 210 of the handle 200 between the hem 110 and the side wall of the bag body 100. Compared with inserting the free end 210 of the handle 200 into the gap of the incision 111, the difficulty of the production process can be greatly reduced.

[0073] In this embodiment, the extending direction of the auxiliary incision 113 is inclined and extends away from the opening with respect to the extending direction of the main incision 112, and the inclination angle of the extending direction of the auxiliary incision 113 with respect to the extending direction of the main incision 112 is within the range of 100° to 145°. Specifically, the inclination angle of the extending direction of the auxiliary incision 113 with respect to the extending direction of the main incision 112 can be 100°, 110°, 125°, 140°, 145° or any inclination angle within the above angle range. This embodiment does not make specific limitations on this.

[0074] The inclination angle of the extending direction of the auxiliary incision 113 with respect to the extending direction of the main incision 112 is within the above range. On the one hand, it is beneficial for the incision 111 to be opened to a larger extent on the surface of the hem 110, thereby forming a through hole, which can not only enable the free end 210 of the handle 200 to extend into the through hole, but also enable the tooling for pulling the free end 210 of the handle 200 to extend into the through hole, further reducing the difficulty of the production process; on the other hand, it avoids the risk of shaking when the free end 210 of the handle 200 extends into the incision 111 and ensures the assembly accuracy between the free end 210 of the handle 200 and the incision 111. If the inclination angle of the extending direction of the auxiliary incision 113 with respect to the extending direction of the main incision 112 is less than 100°, the through hole formed by the incision 111 opening along the auxiliary incision 112 is small, which is not conducive to the free end 210 of the handle 200 passing through the incision 111. If the inclination angle of the extending direction of the auxiliary incision 113 with respect to the extending direction of the main incision 112 is greater than 145°, when the free end 210 of the handle 200 passes through the incision 111, the free end 210 of the handle 200 is prone to shake along the length direction of the main incision 112, thereby reducing the assembly accuracy between the handle 200 and the bag body 100.

[0075] Specifically, as Figure 3As shown, in this embodiment, the incision 111 is in a "︹" shape as a whole, and the incision 111 is symmetrical relative to the midline of the main incision 112. When the folded edge 110 is turned over along the edge of the incision 111, an isosceles trapezoidal through hole is formed on the surface of the folded edge 110, so that when the free end 210 of the handle 200 passes through the through hole opened by the incision 111, the opening of the main incision 112 along the length direction is the same, which is conducive to the accurate assembly of the free end 210 of the handle 200 and the main incision 112.

[0076] like Figure 4 As shown, in another embodiment, the extension direction of the auxiliary incision 113 is orthogonal to the extension direction of the main incision 112, so that the incision 111 is in a "冖" shape. When the folded edge 110 is turned over along the edge of the incision 111, a rectangular through hole is formed on the surface of the folded edge 110, so that when the free end 210 of the handle 200 passes through the through hole opened by the incision 111, the opening of the main incision 112 along the length direction is the same, thereby completing the assembly of the free end 210 of the handle 200 and the main incision 112. It should be noted that, with respect to the specific shape of the incision 111, those skilled in the art can design it according to actual conditions and specific needs, and this embodiment does not specifically limit this.

[0077] like Figure 5 As shown, in another alternative embodiment, the extension direction of the auxiliary cutout 113 is inclined relative to the extension direction of the main cutout 112 toward the direction close to the opening, so that the cutout 111 is in a "冖" shape, and this auxiliary cutout 113 is also conducive to the free end 210 of the handle 200 passing through the cutout 111. Regarding the specific contour shape of the cutout 111, the present invention does not make a sole limitation on this, provided that the free end 210 of the handle 200 can extend between the folded edge 110 and the bag body 100.

[0078] Furthermore, if Figures 3 - 5 As shown, the extension direction of the main incision 112 is parallel to the extension direction of the opening fold 114 of the folded edge 110, and the extension direction of the free end 210 of the handle 200 extending into the main incision 112 is perpendicular to the extension direction of the main incision 112, while the extension direction of the main incision 112 is parallel to the extension direction of the opening fold 114 of the folded edge 110, so that the extension direction of the free end 210 of the handle 200 extending into the main incision 112 is perpendicular to the extension direction of the opening fold 114 of the folded edge 110, so that when the handle 200 bears the weight from the bag body 100, the force on the handle 200 is transmitted to the gripping part along the axial direction of the handle 200, thereby reducing the movement of the free end 210 of the handle 200 along the length direction of the incision 111, and reducing the risk of the end of the incision 111 being pulled and torn by the handle 200.

[0079] Moreover, the distance between the main incision 112 and the opening crease 114 of the hem 110 is in the range of 0 mm to 5 mm. Specifically, the distance between the main incision 112 and the opening crease 114 of the hem 110 can be 0 mm, 3 mm, 4 mm, 4.5 mm, 5 mm, or other distances within the above range. Since the distance between the main incision 112 and the opening crease 114 of the hem 110 is small, when the paper bag 10 is loaded with heavy objects, the handle 200 receives uniform forces from the bag body 100 and the hem 110, reducing the force of the handle 200 pulling the hem 110 in the direction close to the accommodating cavity, ensuring the connection stability between the hem 110 and the bag body 100, and extending the service life of the paper bag 10.

[0080] Specifically, in one embodiment, the distance between the main incision 112 and the opening crease 114 of the hem 110 is 3 mm. Since there is a distance between the main incision 112 and the opening crease 114 of the hem 110, the influence of the free end 210 of the handle 200 on the opening crease 114 of the hem 110 when it extends into the incision 111 is reduced, ensuring the flatness of the edge at the opening of the bag body 100. And because the distance between the main incision 112 and the opening crease 114 of the hem 110 is small, the pulling force acting on the handle 200 is decomposed, the component force pulling the hem 110 in the direction close to the accommodating cavity is small, and the component force in the vertical direction is large, thereby reducing the pulling force of the handle 200 on the hem 110 when lifting the bag body 100.

[0081] In another embodiment, the main incision 112 is flush with the opening crease 114 of the hem 110, that is, the distance between the main incision 112 and the opening crease 114 of the hem 110 is 0 mm. At this time, when the bag body 100 is lifted by the handle 200, the free end 210 of the handle 200 receives the pulling forces from the bag body 100 and the hem 110 both vertically downward. The handle 200 can better bear the weight from the bag body 100, and the handle 200 hardly generates a pulling force on the hem 110, thereby ensuring the connection stability between the hem 110 and the bag body 100.

[0082] As Figure 1 and Figure 6 shown, in one embodiment, the free end 210 of each handle 200 extends into the corresponding incision 111 from the inner side of the opening of the bag body 100 and extends in the direction away from the opening of the bag body 100. The part of the free end 210 of the handle 200 extending between the hem and the bag body 100 can be better fixedly connected to the inner surface of the side wall of the bag body 100 and the inner surface of the hem 110, thereby increasing the connection strength between the handle 200 and the bag body 100.

[0083] In another embodiment, the free end 210 of each handle 200 extends into the corresponding cut 111 from the inner side of the opening of the bag body 100 and is folded towards the opening of the bag body 100 and extends. When lifting the bag body 100 through the handle 200, the free end 210 of the handle 200 is in a "V" shape and surrounds the hem 110, so that there is a high connection strength between the handle 200 and the hem 110, ensuring that the connection between the handle 200 and the bag body 100 is not easily broken or detached when loading heavy objects.

[0084] The free end 210 of the handle 200 and the inner surface of the hem 110 are bonded and fixed through the first bonding part, and the inner surface of the hem 110 and the inner surface of the side wall of the bag body 100 are bonded and fixed through the second bonding part. Therefore, both between the paper bag 10 and the free end 210 of the handle 200 and between the free end 210 of the handle 200 and the hem 110 are bonded and fixed by the bonding parts, ensuring the connection strength between the bag body 100 and the handle 200, and the bonding connection method using the bonding parts will not damage the own structures of the bag body 100 and the handle 200, thus ensuring the structural strength at the connection part of the bag body 100 and the handle 200.

[0085] It should be noted that the first bonding part between the free end 210 of the handle 200 and the inner surface of the hem 110 can be connected in the form of array dotting, coating or hot-melting and fixing the film, and the second bonding part between the inner surface of the hem 110 and the inner surface of the side wall of the bag body 100 can be connected by hot pressing, coating or dotting. The present invention does not make a unique limitation on this.

[0086] As Figure 7 shown, in another embodiment, in order to increase the connection strength between the free end 210 of the handle 200 and the hem 110 and the bag body 100, the paper bag 10 further includes a fastener 300 penetrating through the bag body 100, the free end 210 of the handle 200 and the hem 110, and further fixedly connecting the bag body 100, the free end 210 of the handle 200 and the hem 110 through the fastener 300, thereby improving the load-bearing capacity of the paper bag 10.

[0087] And, as Figure 8 shown, one end of the fastener 300 has an end cap 310, and the end cap 310 abuts against the outer surface of the side wall of the bag body 100. On the one hand, it can press the bag body 100, the free end 210 of the handle 200 and the hem 110 to ensure the assembly stability among the three; on the other hand, the outer surface of the end cap 310 can also be coated with a pattern to increase the aesthetics of the paper bag 10.

[0088] It should be noted that the fastener 300 can be set as a solid rivet. By applying an axial force on the end cap 310 of the rivet, the rivet penetrates through the bag body 100, the free end 210 of the handle 200, and the hem 110, and the solid rivet passes through the bag body 100, the free end 210 of the handle 200, and the hem 110. The end located on the outer surface of the hem 110 is upset to form a nail head, thereby firmly connecting the bag body 100, the free end 210 of the handle 200, and the hem 110 together. Of course, the fastener 300 can be set as a rivet with a hollow structure, and the present utility model does not make a unique limitation on this.

[0089] Furthermore, as Figures 1 - 2 , Figure 9 shown, in this paper bag 10 disclosed in this embodiment, a pair of side surfaces 130 opposite to each other are provided in the thickness direction of the accommodation cavity, and a pair of connecting surfaces 131 are provided between the pair of side surfaces 130.

[0090] Wherein, connecting parts 132 extending outward are respectively provided on both sides of each side surface 130, side edge creases 134 are formed at the parts where the edge of the side surface 130 is connected to the connecting parts 132 on each side, and the connecting parts 132 at the two side edges of the pair of side surfaces 130 are respectively overlapped and bonded together to form a pair of connecting surfaces 131.

[0091] The bottom ends of the pair of connecting surfaces 131 and the bottom surface 120 are respectively connected together through a pair of bottom flanges 124. The bottom flanges 124 are formed at the two side edges of the bottom surface 120 and are folded towards the inside of the accommodation cavity, and the outer wall surface of the bottom flange 124 is bonded to the inner wall surface of the corresponding connecting surface 131.

[0092] Moreover, bottom edge creases 133 are formed at the parts where the bottom ends of the pair of side surfaces 130 are connected to the bottom surface 120, and connecting surface creases 135 that are folded towards the inside of the accommodation cavity are provided in the middle of each connecting surface 131 in the thickness direction of the accommodation cavity.

[0093] The inner folding indentation 121 of the bottom surface 120 includes a main indentation 122 in the middle of the thickness direction of the accommodation cavity and extending parallel to the side surface 130, and auxiliary indentations 123 that respectively extend obliquely from the corner parts of the bottom surface 120 towards the main indentation 122.

[0094] The bag body 100 has a high structural strength. When the side surfaces 130 on both sides are squeezed along the width direction, the two sides of the bag body 100 are folded toward the containing cavity from the connecting surface fold 135 of the connecting surface 131, and the bottom surface 120 of the bag body 100 is folded toward the containing cavity from the main indentation 122 and the auxiliary indentation 123, so that the paper bag 10 is in a folded state. The side surfaces 130 on both sides of the paper bag 10 have no folding marks, which will not affect the printing of various patterns on the side surfaces 130, so that the side surfaces 130 of the paper bag 10 can meet various pattern designs.

[0095] In summary, the utility model discloses a paper bag 10 , and the structure of the paper bag 10 is described below in conjunction with the forming process of the paper bag 10 .

[0096] like Figure 9 As shown, the bottom ends of a pair of side surfaces 130 of the paper bag 10 are connected through the bottom surface 120, and the edges of the pair of side surfaces 130 that are away from each other are formed with unfolded folded edges 110, and the connecting parts 132 of the two side edges of the pair of side surfaces 130 and the two side edges of the bottom surface 120 are formed with bottom flanges 124, and the bottom surface 120 is formed with a main indentation 122 extending parallel to the side surface 130, and auxiliary indentations 123 extending obliquely from the corners of the bottom surface 120 toward the main indentation 122. During the forming process, first, the two free ends 210 of the handle 200 are passed through the cutouts 111 on the corresponding folded edge 110, and fixed to the inner surface of the folded edge 110 through the first bonding portion. Further, the handle 200 on the other side is fixed to the folded edge 110 in the same way, and then the folded edge 110 is folded along the opening fold 114, and the free end 210 of the handle 200 is fixedly connected to the inner surface of the side 130 through the second bonding portion, and the inner surface of the folded edge 110 is connected to the inner surface of the side 130 by gluing. At this time, the handles 200 on both sides are respectively located away from the bag body 100. Then, the two side surfaces 130 are folded in half along the bottom edge fold 133, so that the side surfaces 130 on both sides form a "concave" shape with the ground. Finally, the bottom flange 124 of the bottom surface 120 is folded upward, and the connecting portion 132 of the edge of the side surface 130 is folded along the side fold 134, so that the connecting portions 132 of the two side edges of a pair of side surfaces 130 are overlapped and bonded together to form a pair of connecting surfaces 131, and the outer wall surface of the bottom flange 124 is bonded to the inner wall surface of the corresponding connecting surface 131, thereby completing the molding process of the paper bag 10.

[0097] Compared with the cumbersome steps in the prior art of first fixing the free end on a sheet-shaped handle and then pasting the sheet-shaped handle to the inner side of the bag, this paper bag 10 only needs to pass the handle 200 through the incision 111 and fix it on the hem 110, and then fold the hem 110 and fix it together with the free end 210 of the handle 200 on the bag body 100, which simplifies the forming process of the paper bag 10, reduces the process difficulty, and thus improves the yield rate.

[0098] It should be noted that, in addition to the implementation manners of the present invention described in the above specific embodiments, those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is introduced in conjunction with the preferred embodiments, this does not mean that the features of this invention are limited to this implementation manner. On the contrary, the purpose of introducing the invention in conjunction with the implementation manner is to cover other alternatives or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, many specific details are included in the above description, and the present invention can also be implemented without these details. In addition, in order to avoid confusing or obscuring the key points of the present invention, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0099] It should be noted that, in this specification, similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0100] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0101] The terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0102] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific situations.

[0103] Although the present invention has been illustrated and described by referring to some preferred embodiments of the present invention, those of ordinary skill in the art should understand that the above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. Those skilled in the art can make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A paper bag, characterized in that: The invention comprises a bag body having a containing cavity, wherein the opening periphery of the bag body is formed with a folded edge folded toward the inside of the containing cavity, and the bottom surface of the bag body is formed with an inward folding indentation, and the bottom surface of the bag body in a folded state is folded inward toward the containing cavity along the inward folding indentation; and A pair of handles are provided on opposite sides of the bag opening, and cutouts are respectively formed on the folded edges on opposite sides of the bag opening at positions corresponding to the free ends of the handles. The free end of each handle extends from the inner side of the bag opening into the corresponding cutout, extends to between the folded edge and the side wall of the bag body, and is fixedly connected to the inner surface of the folded edge and the inner surface of the side wall of the bag body.

2. The paper bag according to claim 1, characterized in that: The incision includes a main incision and auxiliary incisions connected to both ends of the main incision. The length of the main incision is adapted to the width of the cross section of the handle, and the auxiliary incisions located on both sides of the main incision extend in an inclined direction relative to the extension direction of the main incision.

3. The paper bag according to claim 2, characterized in that: The extension direction of the auxiliary incision extends outwardly in an inclined direction away from the bag opening relative to the extension direction of the main incision, and the inclination angle of the extension direction of the auxiliary incision relative to the extension direction of the main incision is in the range of 100° to 145°.

4. The paper bag according to claim 2, characterized in that: The incision is in the shape of "︹" as a whole, and the incision is symmetrical relative to the midline of the main incision as a whole.

5. The paper bag according to any one of claims 2 to 4, characterized in that: The extension direction of the main incision is parallel to the extension direction of the fold of the folded edge.

6. The paper bag according to claim 5, characterized in that: The distance between the main incision and the fold of the folded edge is in the range of 0 mm to 5 mm.

7. The paper bag according to claim 5, characterized in that: The free end of each handle extends from the inner side of the bag opening into the corresponding cutout and extends in a direction away from the bag opening; or The free end of each handle extends from the inner side of the bag opening into the corresponding cutout, and is folded over and extends toward the bag opening.

8. The paper bag according to claim 1, characterized in that: The free end of the handle is bonded and fixed to the inner surface of the folded edge via a first bonding portion, and the inner surface of the folded edge is bonded and fixed to the inner surface of the side wall of the bag body via a second bonding portion.

9. The paper bag according to claim 8, characterized in that: The paper bag further comprises a fastener penetrating the bag body, the free end of the handle and the folded edge.

10. The paper bag according to claim 9, characterized in that: One end of the fastener is provided with an end cap, and the end cap abuts against the outer surface of the side wall of the bag body.

11. The paper bag according to claim 1, characterized in that: The handle is configured to have a sheet-like or flat arc-shaped cross-section at least at the free end; and The handle is made of any one of woven cloth, paper material or paper-like material.

12. The paper bag according to claim 1, characterized in that: The accommodating cavity is provided with a pair of side surfaces opposite to each other in the thickness direction, and a pair of connecting surfaces is provided between the pair of side surfaces; wherein Both sides of each of the side surfaces are respectively provided with connecting parts extending outwards, a fold is formed at the portion where the edge of the side surface and the connecting part of each side meet, and the connecting parts of the two side edges of the pair of side surfaces are overlapped and bonded together to form the pair of connecting surfaces; A fold is formed at the position where the bottom ends of the pair of side surfaces meet the bottom surface; The bottom ends of the pair of connecting surfaces are connected to the bottom surface through a pair of bottom flanges, respectively. The bottom flanges are formed on both side edges of the bottom surface and folded inward toward the accommodating cavity. The outer wall surfaces of the bottom flanges are bonded to the inner wall surfaces of the corresponding connecting surfaces. Each of the connecting surfaces is provided with a fold toward the inner side of the accommodating cavity in the middle of the thickness direction of the accommodating cavity; The inward folding indentation of the bottom surface includes a main indentation located in the middle of the accommodating cavity in the thickness direction and extending parallel to the side surface, and auxiliary indentations extending obliquely from the corners of the bottom surface toward the main indentation.

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