Three-layer paper hemming fruit and vegetable container
By setting strip-shaped perforations and ventilation holes in paper fruit and vegetable containers, the problems of water accumulation and poor air circulation inside the containers are solved, enabling rapid drainage and air circulation, thus improving food safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANTOU KEDE ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-21
AI Technical Summary
Existing paper fruit and vegetable containers can easily lead to the inability of liquid to drain when used to hold fresh fruits and vegetables, resulting in moisture accumulation and bacterial growth. Furthermore, the sealed bottom can hinder air circulation, creating a humid and stuffy environment that affects food safety.
Design a three-layer paper rolled-edge fruit and vegetable container with strip-shaped through holes and ventilation holes. The through holes form a three-dimensional breathable and drainage system to promote air circulation and convection, quickly remove residual moisture and reduce humidity.
It enables natural drainage of moisture and effective air circulation within the container, preventing bacterial growth and mold, keeping food dry, and improving food safety.
Smart Images
Figure CN224146479U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a paper container, and more particularly to a three-layer paper rolled-edge fruit and vegetable container. Background Technology
[0002] Currently, in order to reduce the cost and manpower of cleaning food containers, and for reasons of convenience and hygiene, many food producers use disposable paper containers to hold food.
[0003] In the production of disposable paper containers, cardboard is typically used to make them, considering their recyclability and environmental friendliness. Current paper containers typically consist of a bottom and four sides. The bottom is quadrilateral, and the lower edges of each side are connected to the corresponding side edge of the bottom via a first fold line. For adjacent sides, one side has an outer sheath integrally connected to it, and the other side has an inner sheath integrally connected to it via a second fold line. One side of the outer sheath is connected to one side of the inner sheath via a third fold line. Each side has a rolled edge on its upper edge. The paper container is formed by folding along the fold lines. This type of sealed bottom can prevent liquid from draining when used to hold fresh fruits and vegetables, leading to moisture buildup and bacterial growth. Furthermore, the sealed bottom hinders airflow, creating a humid and stuffy environment. The condensation on the inner walls accelerates the spoilage of fresh fruits and vegetables, compromising food safety. Summary of the Invention
[0004] The technical problem to be solved by this utility model is to provide a three-layer paper rolled edge fruit and vegetable container, which can allow residual water in the container to drain naturally and enhance the air circulation and convection at the bottom and sides of the container.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] A three-layer paper rolled-edge fruit and vegetable container includes a bottom surface and four sides. The bottom surface is quadrilateral in shape. The lower side of each side is connected to the corresponding side of the bottom surface through a corresponding first fold line. For two adjacent sides, one side has an outer wrapping sheet integrally connected to the side, and the other side has an inner wrapping sheet integrally connected to the side through a second fold line. One side of the outer wrapping sheet is connected to one side of the inner wrapping sheet through a third fold line. The upper side of each side has a rolled-edge portion. The three-layer paper rolled-edge fruit and vegetable container is formed by folding along each fold line. The container is characterized in that at least one pair of opposite sides are provided with at least one strip-shaped through hole, which extends from the side through the corresponding first fold line to the bottom surface.
[0007] Typically, the bottom, sides, outer wrapping, and inner wrapping are all die-cut from rigid cardboard into the required shape of a three-layer paper rolled-edge fruit and vegetable container and the first fold line, second fold line, and third fold line are molded out. A waterproof membrane layer is laminated on the inner surface of the rigid cardboard; the outer surface of the rigid cardboard is ordinary paper and is not laminated with a waterproof membrane layer, which facilitates the application of adhesive to the outer surfaces of each cardboard.
[0008] When folding a three-layer paper rolled-edge fruit and vegetable container, first cut out the required shape from a rigid cardboard. Then, crease the bottom, sides, outer wrapping, and inner wrapping. Next, fold along the creases, attaching the outer surface of the inner wrapping to the outer surface of the adjacent side. Fold the inner and outer wrappings along the third crease, attaching the inner surface of the inner wrapping to the inner surface of the outer wrapping. This forms a three-layer folded and attached structure consisting of one side, inner wrapping, and outer wrapping, resulting in a semi-finished three-layer paper rolled-edge fruit and vegetable container. Finally, roll or fold the rolled edges of each side of the three-layer paper rolled-edge fruit and vegetable container outwards to complete the process.
[0009] At least one strip-shaped through-hole is provided on each of the opposite sides. The strip-shaped through-hole extends from the side through the corresponding first fold line to the bottom surface, so that the upper part of the strip-shaped through-hole is on the corresponding side and the lower part of the strip-shaped through-hole extends to the bottom surface. If it is used to hold fresh fruits and vegetables, the residual water in the container can be naturally drained through the strip-shaped through-hole on the bottom surface, quickly draining the water in the container and avoiding liquid accumulation at the bottom of the container. This can keep the food dry and reduce the risk of bacterial growth. The upper part of the strip-shaped through-hole on the side provides an airflow channel between the inside and outside of the container, promoting air circulation and convection between the bottom and sides of the container and reducing the humidity inside the container.
[0010] In a preferred embodiment, at least one ventilation hole is provided on each of the pair of opposing sides, and the ventilation holes are positioned higher than the bottom surface. The ventilation holes, located on the sides and higher than the bottom surface, form a convection path of "high-level air intake and low-level exhaust," effectively expelling hot and humid air from the container and preventing food from becoming moldy or softened due to moisture.
[0011] In a further preferred embodiment, the ventilation hole is a round hole, a quadrilateral hole, an elliptical hole, or a strip-shaped hole. Of course, the shape of the ventilation hole can also be other irregular shapes.
[0012] In a further preferred embodiment, the ventilation holes are strip-shaped holes that extend from top to bottom along the height of the side surface. This arrangement creates vertical airflow channels on the other two sides of the container, ensuring uniform ventilation on all four sides.
[0013] In a preferred embodiment, each of the four corners of the bottom surface has a through-hole. The through-hole design eliminates sharp edges at the corners, preventing finger injuries during handling. The through-holes also assist the strip-shaped openings in accelerating the drainage of liquid from corners, while simultaneously reducing container weight and saving raw material consumption.
[0014] In a preferred embodiment, the upper side of the outer packaging sheet is provided with a reinforcing connecting piece integrally connected to the outer packaging sheet. This arrangement allows the inner surface of the reinforcing connecting piece to adhere to the outer surface of the adjacent side via an adhesive layer during bonding, enhancing the adhesion between the outer packaging sheet and the outer surface of the adjacent side. At this time, the reinforcing connecting piece is located outside the folded edge of the adjacent side. During edge rolling, the reinforcing connecting piece, along with the folded edge of the adjacent side, rolls outward, improving the compressive strength of the edge rolling of the three-layer paper-lined fruit and vegetable container opening.
[0015] In a further preferred embodiment, the reinforcing connecting piece is quadrilateral or triangular in shape. Of course, the reinforcing connecting piece can also be other irregular shapes.
[0016] In a preferred embodiment, the rolled edge portion includes a strip rolled edge, the lower side of which is connected to the upper side of the side via a fourth crease line. During the rolling process, the strip rolled edge is rolled outwards sequentially to form the rolled edge portion of the three-layer paper rolled fruit and vegetable container, thereby improving the compressive strength of the opening rolled edge of the three-layer paper rolled fruit and vegetable container.
[0017] In the preferred embodiment, both the outer and inner packaging sheets are fan-shaped.
[0018] Compared with the prior art, this utility model has the following advantages:
[0019] This three-layer paper rolled-edge fruit and vegetable container features strip-shaped perforations and ventilation holes, forming a three-dimensional breathable and drainage system. Residual water inside the container can naturally drain out along the strip-shaped perforations on the bottom, quickly drying the water inside the container and preventing liquid accumulation at the bottom. This keeps food dry and reduces the risk of bacterial growth. Meanwhile, the upper section of the strip-shaped perforations on the side provides airflow channels between the inside and outside of the container, promoting air circulation and convection between the bottom and sides of the container and reducing humidity inside. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure in the unfolded state of a specific embodiment of this utility model;
[0021] Figure 2 This is a schematic diagram of the structure of this utility model in a folded state according to a specific embodiment;
[0022] Figure 3 This is a schematic diagram of the structure of a specific embodiment of the present invention, showing the strip-shaped through hole on another pair of opposite sides. Detailed Implementation
[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.
[0024] like Figure 1-2 As shown, the three-layer paper rolled-edge fruit and vegetable container in this embodiment includes a bottom surface 1 and four sides 2. The bottom surface 1 is quadrilateral in shape. The lower side of each side 2 is connected to the corresponding side of the bottom surface 1 through a corresponding first fold line 11. For two adjacent sides 2, one side of the ...
[0025] like Figure 3 As shown, two strip-shaped through holes 22 are disposed on another pair of opposite side surfaces 2.
[0026] Typically, the bottom surface 1, side surface 2, outer wrapping sheet 3, and inner wrapping sheet 4 are all die-cut from rigid cardboard into the required shape of a three-layer paper rolled-edge fruit and vegetable container and the first fold line 11, the second fold line 12, and the third fold line 13 are molded out. A waterproof membrane layer is laminated on the inner surface of the rigid cardboard. The outer surface of the rigid cardboard is ordinary paper and is not laminated with a waterproof membrane layer, which facilitates the application of adhesive to the outer surfaces of each cardboard.
[0027] When folding a three-layer paper rolled-edge fruit and vegetable container, first cut out the required shape of the three-layer paper rolled-edge fruit and vegetable container on a hard cardboard. Then, crease the bottom surface 1, side surface 2, outer wrapping sheet 3, and inner wrapping sheet 4. Next, fold along the crease line, and attach the outer surface of the inner wrapping sheet 4 to the outer surface of the adjacent side surface 2. Fold the inner wrapping sheet 4 and the outer wrapping sheet 3 along the third crease line 13, so that the inner surface of the inner wrapping sheet 4 is attached to the inner surface of the outer wrapping sheet 3. This forms a three-layer folded and attached structure of side surface 2, inner wrapping sheet 4, and outer wrapping sheet 3, resulting in a semi-finished state of the three-layer paper rolled-edge fruit and vegetable container. Finally, roll or fold the rolled edges 21 of each side surface 2 of the three-layer paper rolled-edge fruit and vegetable container outward to complete the process.
[0028] Two strip-shaped through holes 22 are provided on opposite sides 2. The strip-shaped through holes 22 extend from the side 2 through the corresponding first crease line 11 to the bottom surface 1, so that the upper part of the strip-shaped through hole 22 is on the corresponding side 2, and the lower part of the strip-shaped through hole 22 extends to the bottom surface 1. If it is used to hold fresh fruits and vegetables, the residual water in the container can be naturally drained along the strip-shaped through hole 22 on the bottom surface 1, quickly draining the water in the container, avoiding liquid accumulation on the bottom surface 1 of the container, keeping the food dry, and reducing the risk of bacterial growth. The upper part of the strip-shaped through hole 22 on the side 2 provides an airflow channel between the inside and outside of the container, promoting air circulation and convection between the bottom of the container and the side 2, and reducing the humidity inside the container.
[0029] Two ventilation holes 23 are provided on each of the two opposing sides 2, and the ventilation holes 23 are positioned higher than the bottom surface 1. The ventilation holes 23 are located on the side 2 and higher than the bottom surface 1, forming a convection path of "high-level air intake and low-level exhaust", which effectively removes the hot and humid air in the container and prevents the food from becoming moldy or softened due to moisture.
[0030] The ventilation hole 23 is a strip-shaped hole that extends from top to bottom along the height of the side 2. This arrangement creates vertical airflow channels on the other pair of side 2 of the container, allowing for uniform ventilation on all four sides of the container.
[0031] The bottom surface 1 has four through-holes 5 at its four corners. The design of the through-holes 5 eliminates the sharp edges of the four corners of the bottom surface 1, preventing fingers from being cut when handling the container. The through-holes 5, which run vertically through the bottom surface 1, help the strip-shaped through-holes 22 to accelerate the drainage of liquid accumulated in the corners, while also reducing the weight of the container and saving raw material consumption.
[0032] The upper side of the outer packaging sheet 3 is provided with a reinforcing connecting piece 6 integrally connected to the outer packaging sheet 3. With this arrangement, when the outer packaging sheet 3 is bonded, the inner surface of the reinforcing connecting piece 6 is bonded to the outer surface of the adjacent side 2 through the adhesive layer, which can enhance the bonding ability between the outer packaging sheet 3 and the outer surface of the adjacent side 2. At this time, the reinforcing connecting piece 6 is located outside the rolled edge 21 of the adjacent side 2. When rolling the edge, the reinforcing connecting piece 6 together with the rolled edge 21 of the adjacent side 2 rolls outward, which improves the compressive strength of the opening rolled edge of the three-layer paper rolled fruit and vegetable container.
[0033] The reinforcing connecting piece 6 is quadrilateral in shape. Of course, the shape of the reinforcing connecting piece 6 can also be other irregular shapes.
[0034] The rolled edge portion 21 includes a strip rolled edge 211, the lower side of which is connected to the upper side of the side surface 2 via a fourth crease line 14. During the rolling process, the strip rolled edge 211 is rolled outward in sequence to form the rolled edge portion 21 of the three-layer paper rolled edge fruit and vegetable container, thereby improving the compressive strength of the rolled edge of the opening of the three-layer paper rolled edge fruit and vegetable container.
[0035] Both the outer sheath 3 and the inner sheath 4 are fan-shaped.
[0036] Furthermore, it should be noted that the names of the various parts of the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this utility model patent concept are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, they should all fall within the protection scope of this utility model.
Claims
1. A three-layer paper rolled-edge fruit and vegetable container, comprising a bottom surface and four sides, the bottom surface being quadrilateral in shape, the lower sides of each side surface being connected to the corresponding side surface of the bottom surface via corresponding first fold lines; for adjacent sides, one side surface has an outer wrapping sheet integrally connected to that side surface, and the other side surface has an inner wrapping sheet integrally connected to that side surface via a second fold line, one side of the outer wrapping sheet being connected to one side of the inner wrapping sheet via a third fold line; each side surface has a rolled-edge portion on its upper side surface; the three-layer paper rolled-edge fruit and vegetable container is formed by folding along each fold line; characterized in that: At least one strip-shaped through hole is provided on each of at least one pair of opposite sides, and the strip-shaped through hole extends from the side through the corresponding first crease line to the bottom surface.
2. The three-ply paper-based gusseted fruit and vegetable container of claim 1, wherein: At least one ventilation hole is provided on each of the pair of opposite sides, and the ventilation holes are positioned higher than the bottom surface.
3. The three-ply paper-based gable-top fruit and vegetable container of claim 2, wherein: The ventilation holes can be round, quadrilateral, elliptical, or strip-shaped.
4. The three-ply paper-based gable-top fruit and vegetable container of claim 3, wherein: The ventilation hole is a strip-shaped hole that extends from top to bottom along the height of the side surface.
5. The three-layer paper-based gable-top fruit and vegetable container of claim 1 wherein: The bottom surface has four through-holes at its four corners.
6. The three-ply paper-based gusseted fruit and vegetable container of claim 1 wherein: The upper side of the outer packaging sheet is provided with a reinforcing connecting piece that is integrally connected to the outer packaging sheet.
7. The three-ply paper-based gusseted fruit and vegetable container of claim 6, wherein: The reinforcing connecting piece is in the shape of a quadrilateral or a triangle.
8. The three-ply paper-based gusseted fruit and vegetable container of claim 1 wherein: The rolled edge includes a strip rolled edge, and the lower side of the strip rolled edge is connected to the upper side of the side surface through a fourth crease line.
9. The three-ply paper-based gusseted fruit and vegetable container of claim 1 wherein: Both the outer and inner packaging sheets are fan-shaped.