Exhaust structure of coffee packaging container

Abstract

The utility model provides a kind of exhaust structure of coffee packaging container, belong to packaging technical field.It solves the problem of unstable one-way exhaust performance when existing coffee packaging container is used to package coffee powder.This coffee packaging container's exhaust structure includes one or more exhaust holes opened in sealing film and the one-way exhaust valve corresponding with exhaust hole installed on the outer side of sealing film;Exhaust hole is long strip, and the sealing film includes flat sealing area, trapezoidal hole wall area and triangular hole wall area, trapezoidal hole wall area and triangular hole wall area are inclined to the inner cavity side of container body relative to flat sealing area, every exhaust hole is constituted by two trapezoidal hole wall areas and two triangular hole wall areas, and exhaust narrow slit is formed between two oppositely arranged trapezoidal hole wall areas.This coffee packaging container's exhaust structure reduces the possibility of coffee powder blocking exhaust hole, guarantees exhaust smooth and prolongs the service life of one-way exhaust valve inner membrane.

Description

Technical Field

[0001] This utility model belongs to the field of packaging technology, and relates to a coffee packaging container, particularly a venting structure for a coffee packaging container. Background Technology

[0002] Coffee packaging containers refer to containers used to package roasted coffee beans (hereinafter referred to as coffee beans) or roasted and ground coffee beans (coffee powder). Coffee beans and coffee powder continuously release carbon dioxide. If the packaging is completely sealed, the internal pressure will gradually increase, which may cause the packaging to bulge or even rupture. Therefore, people have come up with the idea of ​​setting up a venting structure on coffee packaging containers. The function of the venting structure is to expel gases (mainly carbon dioxide) in one direction while preventing outside air (mainly oxygen and water vapor) from entering, thereby maintaining the freshness of the coffee.

[0003] To address this, various venting structures have been proposed, such as the one-way venting sealing film described in Chinese patent literature (application number 201120154766.7), which has through holes and a one-way venting valve covering the through holes. Currently, most one-way venting valves used in the market are based on the Oil-less pressure relief valves (US9187229B2) technology described in US patent literature.

[0004] In existing coffee packaging containers, the venting structure uses holes formed by punching away a portion of the surface area. While these holes are small enough for coffee beans to pass through, they are typically larger than coffee grounds. This causes the coffee grounds to come into contact with the diaphragm inside the one-way venting valve, significantly increasing the likelihood of diaphragm damage and coffee grounds accumulating at the venting point. In short, existing coffee packaging containers suffer from unstable one-way venting performance when used for packaging coffee grounds. Summary of the Invention

[0005] This invention proposes a venting structure for a coffee packaging container. The technical problem this invention aims to solve is how to improve the smoothness of venting when the coffee packaging container is used to package coffee powder and reduce the possibility of coffee powder coming into contact with the inner diaphragm of the one-way venting valve.

[0006] The technical problem to be solved by this utility model can be achieved through the following technical solution: a coffee packaging container includes a container body and a sealing film with an aluminum foil layer. The venting structure of the coffee packaging container includes one or more venting holes opened on the sealing film and a one-way venting valve installed on the outer surface of the sealing film corresponding to the venting hole. The venting hole is elongated. The sealing film includes a flat sealing area, a trapezoidal hole wall area and a triangular hole wall area. The trapezoidal hole wall area and the triangular hole wall area are inclined towards the inner cavity of the container body relative to the flat sealing area. Each venting hole is composed of two trapezoidal hole wall areas and two triangular hole wall areas. A narrow venting slit is formed between the two opposite trapezoidal hole wall areas.

[0007] In the venting structure, the width of the venting slit can be smaller than the coffee powder, significantly reducing the possibility of coffee powder escaping. The venting slit is strip-shaped, and controlling its length effectively ensures the venting area and reduces the possibility of coffee powder clogging the slit. The inclined trapezoidal and triangular orifice wall areas not only allow the venting slit to be extruded, making it suitable for industrial production, but also create a sliding slope between the venting slit and the inner surface of the flat sealing area, allowing coffee powder to move towards the periphery of the venting slit, further reducing the possibility of coffee powder escaping and clogging the slit.

[0008] Compared with existing technologies, the venting structure of this coffee packaging container significantly reduces the possibility of coffee powder being discharged through the venting hole and significantly reduces the possibility of coffee powder clogging the venting hole, thereby ensuring smooth venting and extending the service life of the inner diaphragm of the one-way venting valve.

[0009] In the above-mentioned venting structure of the coffee packaging container, the multiple venting holes are of the same length; or the multiple venting holes are divided into one or more long venting holes and one or more short venting holes.

[0010] In the above-mentioned venting structure of the coffee packaging container, the vent has two trapezoidal sides and two triangular sides arranged opposite to each other; the inner end of the vent is a venting slit, and the cross-sectional area of ​​the vent gradually increases from the inside to the outside.

[0011] In the above-mentioned venting structure of the coffee packaging container, the vent is formed by the sealing film being locally squeezed and deformed towards the inner cavity of the container body; the area of ​​the sealing film that is not squeezed and deformed is a flat sealing area, and the area that is squeezed is deformed into a trapezoidal hole wall area and a triangular hole wall area.

[0012] In the venting structure of the coffee packaging container described above, the trapezoidal hole wall regions arranged on two opposite sides have one or more connection points at the venting slit. Attached Figure Description

[0013] Figure 1 This is a 3D structural diagram of a coffee packaging container.

[0014] Figure 2 This is a three-dimensional structural diagram showing the sealing film and one-way vent valve in a disassembled state.

[0015] Figure 3 This is a partial frontal view of the sealing film in Example 1.

[0016] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure of AA.

[0017] Figure 5 This is a partial frontal view of the sealing film in Example 2.

[0018] In the diagram, 1 is the container body; 2 is the sealing film; 2a is the flat sealing area; 2b is the trapezoidal hole wall area; 2c is the triangular hole wall area; 2d is the material sliding slope; 3 is the one-way vent valve; 4 is the vent hole; 41 is the long vent hole; 42 is the short vent hole; and 4a is the vent slit. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0024] Example 1: As Figure 1 As shown, the coffee packaging container includes a container body 1 and a sealing film 2 having an aluminum foil layer and a resin layer. Figures 1 to 4 As shown, the venting structure of the coffee packaging container includes multiple vent holes 4 formed on the sealing film 2 and one-way vent valves 3 installed on the outer surface of the sealing film 2 corresponding to the vent holes 4. The accompanying drawings show that there are six vent holes 4, all of the same length, arranged in a 3x2 grid. The number of vent holes 4 and their arrangement can be adjusted as needed.

[0025] The exhaust port 4 is elongated, and each exhaust port 4 has two trapezoidal sides and two triangular sides arranged opposite each other. Both the trapezoidal sides and the triangular sides are inclined. The inner end of the exhaust port 4 is an exhaust slit 4a. The cross-sectional area of ​​the exhaust port 4 gradually increases from the inside to the outside, and the effective exhaust area is the area of ​​the exhaust slit 4a.

[0026] The vent 4 is formed by locally pressing and deforming the sealing film 2 towards the inner cavity of the container body 1. The undeformed area of ​​the sealing film 2 is the flat sealing area 2a. The aluminum foil layer has excellent ductility, ensuring that the compressed area deforms into trapezoidal hole wall area 2b and triangular hole wall area 2c. The trapezoidal hole wall area 2b corresponds to the trapezoidal side of the vent 4, and the triangular hole wall area 2c corresponds to the triangular side of the vent 4. The aluminum foil layer has rigidity, reducing the possibility of deformation after the vent 4 is formed. The trapezoidal hole wall area 2b and the triangular hole wall area 2c are inclined towards the inner cavity of the container body 1 relative to the flat sealing area 2a. Each vent 4 is composed of two trapezoidal hole wall areas 2b and two triangular hole wall areas 2c, and a narrow vent slit 4a is formed between the two opposite trapezoidal hole wall areas 2b. The venting slit 4a is located on one side of the inner cavity of the container body 1 relative to the flat sealing area 2a. The trapezoidal hole wall area 2b and the triangular hole wall area 2c form a sliding slope 2d between the venting slit 4a and the inner side of the flat sealing area 2a.

[0027] Example 2: This example is basically the same as Example 1 in structure and principle. The similarities will not be repeated here; only the differences will be described. The differences are as follows: Figure 5 As shown in the attached diagram of the instruction manual, there are 7 vent holes 4: 2 short vent holes 42 and 5 long vent holes 41, arranged in 3 rows. The number of short vent holes 42 and long vent holes 41, as well as the arrangement, can be adjusted according to actual needs.

[0028] Example 3: This example is basically the same in structure and principle as Example 1. The similarities will not be repeated here; only the differences will be described. The difference lies in the fact that the two opposing trapezoidal hole wall regions 2b have one or more connection points at the venting slit 4a. After the sealing film 2 is processed, the connection points can significantly reduce the possibility of the venting slit 4a expanding.

Claims

1. A venting structure for a coffee packaging container, the coffee packaging container comprising a container body (1) and a sealing film (2) having an aluminum foil layer, the venting structure comprising one or more vent holes (4) formed on the sealing film (2) and a one-way vent valve (3) installed on the outer surface of the sealing film (2) corresponding to the vent holes (4); characterized in that, The vent (4) is elongated. The sealing film (2) includes a flat sealing area (2a), a trapezoidal hole wall area (2b), and a triangular hole wall area (2c). The trapezoidal hole wall area (2b) and the triangular hole wall area (2c) are inclined towards the inner cavity of the container body (1) relative to the flat sealing area (2a). Each vent (4) is composed of two trapezoidal hole wall areas (2b) and two triangular hole wall areas (2c). A venting slit (4a) is formed between the two opposite trapezoidal hole wall areas (2b).

2. The deaeration structure of a coffee packaging container according to claim 1, characterized by, The venting slit (4a) is located on one side of the inner cavity of the container body (1) relative to the flat sealing area (2a), and there is a material sliding slope (2d) between the venting slit (4a) and the inner side of the flat sealing area (2a).

3. The deaeration structure of a coffee packaging container according to claim 1, characterized by, The multiple exhaust holes (4) are of the same length; or the multiple exhaust holes (4) are divided into one or more long exhaust holes (41) and one or more short exhaust holes (42).

4. The venting structure of the coffee packaging container according to claim 1, characterized in that, The exhaust hole (4) has two trapezoidal sides and two triangular sides arranged opposite each other; the inner end of the exhaust hole (4) is an exhaust slit (4a), and the cross-sectional area of ​​the exhaust hole (4) gradually increases from the inside to the outside.

5. The deaeration structure of a coffee packaging container according to claim 1 or 2 or 3 or 4, characterized in that, The vent (4) is formed by the local compression deformation of the sealing film (2) towards the inner cavity of the container body (1); the area of ​​the sealing film (2) that is not compressed and deformed is the flat sealing area (2a), and the compressed area is deformed into the trapezoidal hole wall area (2b) and the triangular hole wall area (2c).

6. The deaeration structure of a coffee packaging container according to claim 1 or 2 or 3 or 4, characterized in that, The trapezoidal hole wall region (2b) arranged on two opposite sides has one or more connection points at the venting slit (4a).

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