Double-layer paper hemming fruit and vegetable container
By setting strip-shaped through-holes and raised strips to form a self-flowing system in the paper container, combined with side ventilation holes, the problems of liquid accumulation and moisture in the paper container are solved, achieving rapid drainage and air circulation, and 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 containers make it difficult for liquids to drain when used to hold fresh fruits and vegetables, which can easily lead to bacterial growth. Furthermore, the sealed bottom can obstruct air circulation, creating a humid and stuffy environment that can compromise food safety.
Design a double-layered paper rolled-edge fruit and vegetable container. By setting strip-shaped through holes on opposite sides and bottom protrusions to form a self-flow system, and combining it with side ventilation holes to construct a three-dimensional breathable drainage system, promote air circulation and convection, and ensure liquid discharge and dryness inside the container.
It enables rapid drainage of liquid from the container, reduces the risk of bacterial growth, keeps food dry, lowers humidity, and improves food safety.
Smart Images
Figure CN224146480U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a paper container, and more particularly to a double-layered 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 of the bottom via first fold lines. For adjacent sides, one side has an integrally connected outer sheath. Each side has a rolled edge on its upper edge. The container is formed by folding along the first 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. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a double-layered 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 double-layered 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 surface is connected to the corresponding side of the bottom surface through a corresponding first fold line. For adjacent two sides, one side surface has an outer cover piece integrally connected to that side surface. The upper side of each side surface has a rolled-edge portion. The double-layered paper rolled-edge fruit and vegetable container is formed by folding along each first fold line. The container is characterized in that: at least one strip-shaped through hole is provided on at least one pair of opposite sides, and the strip-shaped through hole extends from the side surface through the corresponding first fold line to the bottom surface. At least one upwardly protruding ridge is provided on the bottom surface, the ridge is located between two opposite strip-shaped through holes, and the two ends of the ridge extend to the edge of the corresponding strip-shaped through hole.
[0007] Typically, the bottom, sides, and outer sheath are all made of rigid cardboard, which is die-cut into the shape required for a double-layered paper rolled-edge fruit and vegetable container and the first crease line is molded out. The inner surface of the rigid cardboard is laminated with a waterproof membrane layer; 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 double-layered paper rolled-edge fruit and vegetable container, first cut out the required shape from a rigid cardboard. Then, crease the bottom, sides, and outer wrapping. Next, fold along the first crease line and attach the inner surface of the outer wrapping to the outer surface of the adjacent side. This forms a double-layered folded and attached structure between the sides and the outer wrapping, resulting in a semi-finished double-layered paper rolled-edge fruit and vegetable container. Finally, roll or fold the rolled edges of each side of the double-layered 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. The bottom surface protrudes upward to form a raised ridge, forming a "high ridge and low hole" self-flow system on the bottom surface. Even if the liquid volume in the container is small, it can flow to the strip-shaped through-hole on the bottom surface due to gravity, ensuring that the liquid in the container can be drained relatively thoroughly. If it is used to hold fresh fruits and vegetables, the residual water in the container can be drained naturally along 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, which 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] The aforementioned raised strips are formed through molding, causing the bottom surface to bulge upwards, significantly increasing the rigidity of the bottom surface. This effect is particularly noticeable for double-layered paper-based rolled-edge fruit and vegetable containers with large bottom surfaces. The two ends of the raised strips seamlessly connect to the edges of the strip-shaped through-holes, preventing liquid from accumulating at the entrance of the through-holes and creating dead zones.
[0011] 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 "high-level air intake - low-level exhaust" convection path, effectively expelling hot and humid air from the container and preventing food from becoming moldy or softened due to moisture.
[0012] 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.
[0013] 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.
[0014] In a preferred embodiment, the height of the protrusion is 0.5mm-3.0mm.
[0015] In a further preferred embodiment, the upper surface of the convex strip is an arc surface.
[0016] 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.
[0017] 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 second crease line. During the rolling process, the strip rolled edge is rolled outwards sequentially to form the rolled edge portion of the double-layer paper rolled-edge fruit and vegetable container, thereby improving the compressive strength of the opening rolled edge of the double-layer paper rolled-edge fruit and vegetable container.
[0018] Compared with the prior art, this utility model has the following advantages:
[0019] This double-layered 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, thus keeping food dry and reducing 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 the container. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model in a folded state according to a specific embodiment;
[0021] Figure 2 This is a schematic diagram of the structure in the unfolded state of a specific embodiment of this utility model;
[0022] Figure 3 yes Figure 2 Cross-sectional view of AA in the middle;
[0023] Figure 4 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
[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.
[0025] like Figure 1-3 As shown, the double-layer paper rolled-edge fruit and vegetable container in this embodiment includes a bottom surface 1 and four side surfaces 2. The bottom surface 1 is quadrilateral in shape. The lower side surface of each side surface 2 is connected to the corresponding side surface of the bottom surface 1 through a corresponding first fold line 11. For two adjacent side surfaces 2, one side surface 2 is provided with an outer cover 3 integrally connected to the side surface 2. The upper side surface of each side surface 2 is provided with a rolled edge portion 21. The double-layer paper rolled-edge fruit and vegetable container is formed by folding along each first fold line 11. Two strip-shaped through holes 22 are provided on a pair of opposite side surfaces 2. The strip-shaped through holes 22 extend from the side surface 2 through the corresponding first fold line 11 to the bottom surface 1. At least one upwardly protruding ridge 4 is provided on the bottom surface 1. The ridge 4 is located between two opposite strip-shaped through holes 22, and the two ends of the ridge 4 extend to the edge of the corresponding strip-shaped through hole 22.
[0026] like Figure 4 As shown, two strip-shaped through holes 22 are disposed on another pair of opposite side surfaces 2.
[0027] Typically, the bottom surface 1, side surface 2, and outer wrapping sheet 3 are all made of rigid cardboard, which is die-cut into the shape required for a double-layered paper rolled-edge fruit and vegetable container and the first crease line 11 is molded out. The inner surface of the rigid cardboard is laminated with a waterproof membrane layer; 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.
[0028] When folding a double-layered paper rolled-edge fruit and vegetable container, first cut out the required shape of the double-layered paper rolled-edge fruit and vegetable container on a hard cardboard. Then, crease the bottom surface 1, side surface 2, and outer wrapping 3. Next, fold along the first crease line 11 and attach the inner surface of the outer wrapping 3 to the outer surface of the adjacent side surface 2 to form a double-layered folded and attached structure of side surface 2 and outer wrapping 3, thus obtaining a semi-finished state of the double-layered paper rolled-edge fruit and vegetable container. Finally, roll or fold the rolled edges 21 of each side surface 2 of the double-layered paper rolled-edge fruit and vegetable container outward to complete the process.
[0029] 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. The convex strip 4 formed by the upward protrusion of the bottom surface 1 forms a "high ridge and low hole" self-flow system on the bottom surface 1. Even if the liquid volume in the container is small, it can flow to the strip-shaped through hole 22 on the bottom surface 1 due to gravity, ensuring that the liquid in the container can be drained relatively thoroughly. 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 and avoiding liquid accumulation on the bottom surface 1 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 22 on the side 2 provides an airflow channel between the inside and outside of the container, promotes air circulation and convection between the bottom of the container and the side 2, and reduces the humidity in the container.
[0030] The aforementioned raised strip 4 is formed by molding, causing the bottom surface 1 to bulge upwards to form the raised strip 4, which greatly increases the rigidity of the bottom surface 1, especially for double-layered paper rolled-edge fruit and vegetable containers with a large bottom surface 1. The two ends of the aforementioned raised strip 4 are seamlessly connected to the edge of the strip-shaped through hole 22, preventing liquid from accumulating at the entrance of the strip-shaped through hole 22 and forming dead corners.
[0031] The height of the convex strip 4 is 1.5mm.
[0032] The upper surface of the convex strip 4 is curved.
[0033] Two ventilation holes 23 are provided on the other pair of opposite 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 are 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.
[0034] 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.
[0035] 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.
[0036] 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 second crease line 12. During the rolling process, the strip rolled edge 211 is rolled outward in sequence to form the rolled edge portion 21 of the double-layer paper rolled edge fruit and vegetable container, thereby improving the compressive strength of the rolled edge of the opening of the double-layer paper rolled edge fruit and vegetable container.
[0037] 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 double-layered paper rolled-edge fruit and vegetable container, comprising a bottom surface and four sides, the bottom surface being quadrilateral in shape, and the lower side edge of each side surface being connected to the corresponding side edge of the bottom surface via a corresponding first fold line; for adjacent sides, one side edge is provided with an outer covering piece integrally connected to that side edge; each side edge is provided with a rolled-edge portion on its upper edge; the double-layered paper rolled-edge fruit and vegetable container is formed by folding along each first fold line; characterized in that: At least one strip-shaped through hole is provided on at least one pair of opposite sides, the strip-shaped through hole extending from the side through the corresponding first crease line to the bottom surface; at least one upwardly protruding ridge is provided on the bottom surface, the ridge is located between two opposite strip-shaped through holes, and the two ends of the ridge extend to the edge of the corresponding strip-shaped through hole.
2. The double-ply paper-based fluted 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 double-ply paper-based fluted fruit and vegetable container of claim 2, wherein: The ventilation holes can be round, quadrilateral, elliptical, or strip-shaped.
4. The double-ply paper-based fluted 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 double-layered paper rolled-edge fruit and vegetable container as described in claim 1, characterized in that: The height of the protrusion is 0.5mm-3.0mm.
6. The double-ply paper-based fluted fruit and vegetable container of claim 5, wherein: The upper surface of the convex strip is an arc surface.
7. The double-ply paper-based fluted fruit and vegetable container of claim 1 wherein: The bottom surface has four through-holes at its four corners.
8. The double-ply paper-based fluted fruit and vegetable container of claim 1 wherein: The rolled edge includes a strip rolled edge, the lower side of which is connected to the upper side of the side surface through a second crease line.