New 3D filter net bag
The three-dimensional filter net bag with adjustable stitching and sealing options addresses the challenge of achieving a spherical structure, offering enhanced aesthetics and practicality for tea infusion and other applications.
Patent Information
- Application Number
- JP2025003119U
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-09-10
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2035-09-10
AI Technical Summary
Existing three-dimensional filter net bags lack the ability to achieve a spherical, three-dimensional structure with a large internal volume, failing to conform to the shape of typical bottle containers and meet modern consumer demands for aesthetics and practicality.
A three-dimensional filter net bag composed of a bag body, bag bottom, and bag top, made of nylon or corn fiber, with adjustable stitching and sealing options, allowing for various shapes, including a concave cup-like structure and floating functionality, and featuring a hanging string for easy handling.
The bag can be directly inserted into a bottle container, providing a large internal space for whole-leaf tea extraction, enhancing aesthetics and practicality, and is versatile for multiple uses such as herbal medicine and seasoning bags.
Smart Images

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Abstract
Description
[Technical Field]
[0001] This invention relates to the technical field of tea infusion equipment, and in particular to a new type of three-dimensional filter net bag. [Background technology]
[0002] Many of the three-dimensional filter net bags currently on the market originate from technology developed in Japan in the 1990s, such as the square-sided bag and triangular bag structures disclosed in patent document JPH05147670A. Chinese patent document CN218705212U further expands the variety of three-dimensional shapes based on this technology, but due to limitations in processing methods and materials, it is still difficult to realize a spherical bag with an arc structure. In actual use, the primary function of the bag is to constrain the spatial configuration of the tea leaves within the container. Ideally, the bag would have a spherical, three-dimensional structure with a large internal volume, easily conform to the shape of a typical bottle, and improve aesthetics and practicality. However, conventional technology has not been able to achieve such a structure, and many of the bags on the market have unnatural shapes and are not very practical. With the rapid development of the new tea beverage market, conventional bags are finding it difficult to meet modern consumer demands. Therefore, there is a strong demand for the development of a new three-dimensional filter net bag that can better conform to the shape of the bottle container. Summary of the Invention
[0003] The purpose of this invention is to solve the problems of the prior art and to provide a three-dimensional filter net bag with a reasonable structure, various shapes, and excellent applicability.
[0004] To achieve the above objectives, the present invention provides the following technical means: The new three-dimensional filter net bag includes a bag body, which is composed of three parts: a bag body, a bag bottom, and a bag top. This three-dimensional filter net bag is made of nylon or corn fiber filter net material. The bag top has a bag opening, and the bag body is located in the center of the bag. It has a ring structure and can be cylindrical or rectangular. It can also be pre-processed into arc-shaped petals or other shapes to create character or geometric shapes. The bag bottom is located at one end of the bag body and is joined to the bag wall to seal the end, forming a concave cup-like structure. The bag top is located at the other end of the bag body and is usually the floating part. A hollow float can be added to provide floating functionality. The bag top also functions as the loading and sealing part, and can be fully sealed, partially sealed, or open-ended. The bag body is the main structure of the bag, and its stitching can be seamless, single stitched, or multiple stitched, and its shape can be adjusted according to the structure of both ends. The bag body and the bag bottom, and the bag top and the bag body are connected by sewing or integral molding, respectively. Furthermore, a sealing part is provided at the top end of the bag to facilitate loading and sealing. Furthermore, the bag bottom can be round, square or plum blossom shaped. Furthermore, a hanging string is provided on the bag body or the upper end of the bag to facilitate hanging and handling. Furthermore, the filter net bag can be used by being placed in a bottle container. Furthermore, a float is provided at the top end of the bag to increase floating stability. Furthermore, the joints can be processed into a lace skirt pattern to improve the aesthetic appearance.
[0005] Compared with conventional technology, the advantages of this invention are as follows: The three-dimensional bag structure allows the bag to be directly inserted into a bottle container, and the large internal space allows for the extraction of whole-leaf tea leaves, fully releasing the tea aroma. The appearance is fashionable and beautiful, meeting modern consumer trends. The bag opening, body, and bottom can be freely combined to create a variety of three-dimensional shapes, adapting to a variety of dim sum occasions. Furthermore, this filter net bag can also be used as a herbal medicine bag, a seasoning bag for stewing, or a filter bag for juice or soy milk, making it versatile and highly practical. [Brief explanation of the drawings]
[0006] [Figure 1] FIG. 1 is a schematic diagram showing the configuration of a three-dimensional filter net bag with a circular bottom according to the present invention from two different viewing angles. [Figure 2] FIG. 2 is a schematic diagram showing the three-dimensional filter net bag with a circular bottom according to the present invention from two different angles. [Figure 3] FIG. 3 is a schematic diagram showing the rectangular bottom three-dimensional filter net bag of the present invention from two different viewing angles. [Figure 4] FIG. 4 is a schematic diagram showing the rectangular bottom three-dimensional filter net bag of the present invention from two different viewing angles. [Figure 5] FIG. 5 is a schematic diagram showing the plum blossom-shaped three-dimensional filter net bag with the bottom according to the present invention from two different viewing angles. [Figure 6] FIG. 6 is a schematic diagram showing the plum blossom-shaped three-dimensional filter net bag with the bottom according to the present invention from two different viewing angles. [Figure 7] Figure 7 is a schematic diagram of a semi-enclosed type bag in which the bag body and bottom are integrally molded. [Figure 8] Figure 8 is a schematic diagram of a semi-enclosed type bag in which the bag body and the bag bottom are sewn together. [Figure 9] FIG. 9 is a schematic diagram of a semi-enclosed type bag with a hanging string attached to the bag body. [Figure 10] FIG. 10 is a schematic diagram of a semi-sealed type bag with a hanging string attached to the upper end of the bag. [Figure 11]Figure 11 is a schematic diagram of a fully enclosed type with a spherical body and a swim bladder. [Figure 12] Figure 12 is a schematic diagram of a fully enclosed type in which the bag body is perfectly spherical. [Figure 13] Figure 13 is a schematic diagram of a fully sealed container with a three-dimensional heart-shaped bag body. DETAILED DESCRIPTION OF THE INVENTION
[0007] The present invention will now be described in more detail with reference to the accompanying drawings. As shown in Figures 1 to 13, the three-dimensional filter net bag of the present invention includes a bag body, which is composed of a bag body 2, a bag bottom 1, and a bag top 3. The three-dimensional filter net bag is made of a filter net material such as nylon or corn fiber. The bag top 3 has a bag opening, and the bag body 2 is the central part of the bag, has a ring shape, and can be processed into various three-dimensional shapes. The bag bottom 1 seals one end of the bag and forms a cup-like structure together with the bag wall. The bag top 3 is the loading and sealing part, and a float can be attached to achieve floating, with flexible sealing methods available. The upper end 3 of the bag can be equipped with a sealing part 4 (such as a drawstring or fastener) to realize the opening and closing function. The bottom 1 of the bag can be formed into a circular, square, or plum blossom shape. A hanging string 5 is attached to the bag body 2 or the upper end 3 of the bag to facilitate hanging operation during use. The pouch can be manufactured by sewing together multiple pieces of filter net material or by one-piece molding. The various sewing methods offer great flexibility in design, allowing it to be adapted to different usage scenarios and aesthetic requirements. [Explanation of symbols]
[0008] 1 bag bottom 2 bags 3 Top end of bag 4 Sealing parts 5 Hanging cord
Claims
1. A new three-dimensional filter net bag, The bag includes a bag body, which is composed of three parts: a bag body 2, a bag bottom 1, and a bag upper end 3, and a bag opening is provided at the bag upper end. The three-dimensional filter net bag is formed of a filter net material made of nylon or corn fiber. The bag body 2 is located in the center of the bag body and has a ring structure, and can be cylindrical or rectangular. In addition, the filter net material that has been processed into an arc-shaped petal shape or the like can be further tailored into a character shape or a geometric shape. The bag bottom 1 is disposed at one end of the bag body 2, and is joined to the bag wall to seal the end, forming a concave cup-like structure together with the bag wall, and is the end of the bag body that is sealed first; The upper end 3 of the bag is located on the side of the bag body 2 opposite the bag bottom 1, and is the floating part of the bag body. An independent floating bag can be provided at the upper end 3 of the bag, which allows the entire bag body to float with the upper end of the bag facing upward. The upper end 3 of the bag is the part where the contents are filled and is also the joint where the bag is finally sealed, and the sealing method is either fully sealed, semi-sealed or open-ended. The bag body 2 is a main part of the bag body, and the bag wall has a three-dimensional spatial structure. The filter net of the bag body 2 is sewn seamlessly, single-stitched or multi-stitched, and its shape is adjusted according to the structure of the bottom and top of the bag. The new three-dimensional filter net bag is characterized in that the bag body 2 and the bag bottom 1, and the bag upper end 3 and the bag body 2 are connected by sewing or integral molding, respectively.
2. The new three-dimensional filter net bag according to claim 1, characterized in that the upper end 3 of the bag is provided with a sealing part 4, which is opened when filling the contents, and the opening of the bag is squeezed closed or closed when sealing, thereby preventing leakage of the contents.
3. 3. The new three-dimensional filter net bag according to claim 2, wherein the bottom part 1 of the bag is circular, square or plum blossom shaped.
4. 2. The new three-dimensional filter net bag according to claim 1, wherein the bag body (2) is provided with a hanging string (5).
5. 2. The new three-dimensional filter net bag according to claim 1, wherein a hanging string is provided at the upper end of the bag.
6. The new three-dimensional filter net bag according to claim 1, characterized in that the three-dimensional filter net bag can be inserted into a bottle container.
7. 2. The new three-dimensional filter net bag according to claim 1, wherein a float is provided above the upper end of the bag.
8. 2. The new three-dimensional filter net bag according to claim 1, wherein the joints of the three-dimensional filter net bag are processed into a lace skirt pattern.