Reusable paper cup with an airtight ultrasonically sealed premix preservation system

Abstract

The disclosed invention comprises a reusable paper cup (1) with an airtight ultrasonically sealed premix preservation system, comprising a polypropylene (PP) bucket (3) securely placed at the base of the paper cup (2). The polypropylene (PP) bucket (3) houses a hygroscopic premix (4) and is ultrasonically sealed to the paper cup base (2) using an ultrasonic sealing anode (6), ensuring an airtight and moisture-proof compartment. The hygroscopic premix (4) is dispensed into the polypropylene (PP) bucket (3) using a weighmetric filling machine. An aluminum foil covering (5) is placed over the polypropylene (PP) bucket (3) and fused using a heat sealer, providing an additional protective barrier. Therefore, the present invention ensures prolonged freshness and protection of the hygroscopic premix (4), withstanding high temperatures during use. The invention overcomes the limitations of conventional paper cups by offering superior moisture resistance, airtight sealing, and sustainable reusability.

Description

[0001] “REUSABLE PAPER CUP WITH AN AIRTIGHT ULTRASONICALLY SEALED PREMIX PRESERVATION SYSTEM”

[0002] TECHNICAL FIELD

[0003]

[0001] This invention relates to a reusable paper cup with an airtight ultrasonically sealed premix preservation system. More specifically, the present invention relates to a reusable paper cup incorporating a polypropylene (PP) insert at its base, ultrasonically sealed to create an airtight and moisture-proof compartment for storing hygroscopic premixes, ensuring long-term freshness and preserving the quality of the premix by preventing air and moisture ingress while also maintaining heat resistance and food safety during use.

[0004] BACKGROUND OF INVENTION

[0005]

[0002] The development of beverage cups has evolved significantly over the years, driven by the need for convenience, durability, and sustainability in packaging. Traditionally, beverage cups were crafted from materials such as clay, wood, and metal, but with the advent of mass production and increasing consumer demands, paper and plastic became the dominant materials in modern beverage cup design.

[0006]

[0003] Paper cups, widely used for hot and cold beverages, have long been valued for their biodegradability and ability to provide an environmentally friendly alternative to plastic. However, despite their eco-friendly nature, paper cups face several challenges, particularly in terms of moisture resistance and preserving the freshness of the beverage content. The inability of paper alone to create an airtight seal has led to the use of plastic liners or coatings, which complicates recycling and raises concerns about the environmental impact of non-biodegradable components. The use of plastic cups, on the other hand, has grown due to their superior moisture resistance and structural durability. Plastic materials, such as polypropylene (PP), have been commonly used in packaging due to their resistance to heat, moisture, and their ability to provide a barrier to contaminants. Despite these benefits, the environmental concerns associated with single-use plastics have prompted the development of alternative solutions aimed at reducing waste and improving recyclability.

[0004] Throughout the 20th century, various innovations in beverage cup design have focused on improving both functionality and sustainability. For example, advancements in sealing technologies, such as heat-sealing and adhesive bonding, allowed for the creation of moistureresistant cups. Additionally, the development of layered materials, including the use of laminated plastics or coatings, helped provide better protection against moisture while maintaining the structural integrity of the cup.

[0007]

[0005] The growing demand for sustainable packaging solutions, coupled with increased awareness of environmental issues, has led to significant research into alternative materials and processes. The rise of composite materials, which combine the benefits of both paper and plastic, has sparked innovations in hybrid designs that aim to address the limitations of traditional single-material cups. These hybrid designs attempt to combine the natural biodegradability of paper with the moisture resistance and durability of plastic.

[0008]

[0006] As environmental concerns about single-use plastics continue to rise, the beverage industry has seen an increasing shift toward recyclable and reusable alternatives. The exploration of ultrasonic sealing techniques has gained traction as a method for creating secure, moisture-resistant seals in various food and beverage products, offering a promising solution for improving the shelf life and quality of packaged beverages. However, various apparatus and methods for the development of beverage preparation cups with advancements in materials, sealing techniques, and design are available in the prior art. For example, the following patents are referenced for their relevant teachings and are incorporated herein by reference.

[0009]

[0007] Korean Patent No. KR101100783B1 discloses a reusable paper cup comprising a paper layer with multiple coating layers designed to enhance durability and resistance to liquid penetration. The cup features a first coating layer on the inner surface that includes silver nanoparticles for antimicrobial properties, a second coating layer with A12O3 for enhanced heat resistance, and a third coating layer on the upper outer surface for additional strength. While the invention addresses durability and heat resistance, it primarily focuses on improving the structural integrity of the paper cup rather than preserving the freshness of the beverage content itself.Furthermore, it does not provide a moisture-proof solution for the contents over extended periods, as it lacks a specific mechanism to ensure long-term preservation.

[0010]

[0008] Chinese Patent No. CN220616515U discloses a novel anti-scald reusable Tibetan tea cup, which features a heat insulation layer and waterproof properties, along with a filter screen for tea leaves. However, it lacks an airtight and moisture-proof system for preserving the freshness of the contents, limiting its ability to store premixed ingredients for extended periods. Additionally, it does not incorporate advanced sealing techniques or eco-friendly materials, unlike the present invention, which ensures long-term freshness and reusability.

[0011]

[0009] Chinese Patent No. CN219858053U discloses a moisture-proof double-layer paper cup with a heat insulation sleeve and foldable design to save space during transportation. While the cup offers some insulation and protection, the reliance on foldable components and external insulation may reduce the overall durability compared to the more robust, moisture-proof design of the present invention.

[0012]

[0010] Indian Patent No. 202317085584 discloses a disposable cup with a hermetic film dividing the cup into two chambers to store ingredients separately until mixing. While the invention offers convenience in compartmentalizing ingredients, it lacks a focus on preserving the freshness of the contents or the ability to be reused. The cup is designed for single use and does not incorporate any advanced sealing methods or moisture-proof mechanisms like the present invention.

[0013]

[0011] Chinese patent publication no. CN107640394A discloses a reusable paper cup with a replaceable cup rim. The invention features an inner cup body in the shape of a hollow circular truncated cone and a detachable cup rim cover connected to the upper end of the inner cup body via a convex-concave groove. The outer cup body is spaced from the inner cup body, and the bottom portion of the inner cup body is glued to the lower end of the outer cup body. This design allows for convenient replacement of the cup rim cover and includes a thermal insulation layer to prevent scalding when drinking hot beverages. However, the invention does not address the issue of preserving beverage ingredients inside the cup or offer a mechanism to prevent moisture contamination. Unlike the present invention, which incorporates a sealed premix preservationsystem within the cup body, the cited prior art focuses primarily on user safety and ease of maintenance for the cup structure.

[0014]

[0009] There are disadvantages associated with the prior art. One of the disadvantages is that the durability of the paper cup is enhanced through multiple coating layers, which improves liquid penetration resistance and heat resistance, but it does not address long-term freshness preservation or airtight sealing, making it unsuitable for storing sensitive premix ingredients.

[0015]

[0010] Another disadvantage associated with the prior art is that the cup includes heat insulation and waterproof properties, but it does not integrate an airtight sealing mechanism to prevent moisture contamination, making it unsuitable for long-term premix storage.

[0016] [Oil] Still another disadvantage associated with the prior art is that a double-layer design prioritizes transport efficiency but compromises durability, making it unsuitable for withstanding high temperatures or securely storing premix ingredients over an extended period.

[0017]

[0012] Another disadvantage associated with the prior art is that the dual-chamber system is limited to separating ingredients, but its disposable nature creates unnecessary waste and does not address sustainability or reusability, which are increasingly demanded in eco-friendly products.

[0018]

[0013] Yet another disadvantage associated with the prior art is that replaceable rim design improves user convenience, but it complicates structural integrity and cleaning while failing to provide any functional benefit for storing or protecting sensitive beverage ingredients.

[0019]

[0014] Still another disadvantage associated with the prior art is that the inclusion of a filter screen for tea leaves limits its use to specific beverages, lacking versatility for storing premixes of varying compositions such as powdered milk-tea blends or coffee.

[0020]

[0015] A further disadvantage associated with the prior art is that the reliance on external insulation sleeves creates unnecessary components that are not integrated into the cup’s design, leading to increased waste and reduced efficiency in production and disposal.

[0016] Another disadvantage associated with the prior art is that the hermetic film separation is a temporary solution that cannot withstand prolonged storage periods, thereby making it unsuitable for premixes with strict moisture or freshness requirements.

[0021]

[0017] Yet another disadvantage associated with the prior art is that the glue-bonded dual-layer design introduces risks of delamination or structural failure when exposed to high temperatures, rendering the cup unreliable for use with hot liquids or boiling water.

[0022]

[0018] The present application addresses the above-mentioned concerns and shortcomings with regard to a reusable paper cup with an airtight ultrasonically sealed premix preservation system.

[0023] OBJECT OF THE INVENTION

[0024]

[0019] Therefore, the object of the present invention is to provide a reusable paper cup with an airtight ultrasonically sealed premix preservation system that obviates the disadvantages associated with the prior art.

[0025]

[0020] Another object of the present invention is to provide a reusable paper cup with an airtight ultrasonically sealed premix preservation system that ensures long-term freshness of hygroscopic premix ingredients by preventing air and moisture ingress.

[0026]

[0021] Yet another object of the present invention is to provide a reusable paper cup with an airtight ultrasonically sealed premix preservation system that has a durable and heat-resistant design capable of withstanding exposure to boiling water temperatures up to 180-200°C without compromising its structural integrity.

[0027]

[0022] Still another object of the present invention is to provide a reusable paper cup with an airtight ultrasonically sealed premix preservation system with an integrated, moisture-proof storage compartment for premixes, that may be powdered coffee, tea, or sugar blends, ensuring they remain fresh and unspoiled even in humid or high-temperature environments.

[0023] Yet another object of the present invention is to provide a reusable paper cup with an airtight ultrasonically sealed premix preservation system that has a polypropylene (PP) bucket placed at its base, ultrasonically sealed to create a tamper-proof airtight compartment, ensuring that stored premixes are preserved for extended periods.

[0028]

[0024] The further object of the present invention is to provide a reusable paper cup with an airtight ultrasonically sealed premix preservation system that eliminates the need for external moisture barriers or additional packaging by integrating a fully sealed and heat-resistant compartment directly into its design, thereby enhancing convenience and reducing waste.

[0029]

[0025] Yet another object of the present invention is to provide a reusable paper cup with an airtight ultrasonically sealed premix preservation system with an ergonomic and lightweight design that allows for easy handling, stacking, and transportation while also maintaining an airtight seal for the stored contents.

[0030]

[0026] Another object of the present invention is to provide a reusable paper cup with an airtight ultrasonically sealed premix preservation system that uses ultrasonic sealing technology to eliminate the need for adhesives, ensuring premix safety while reducing environmental impact.

[0031]

[0027] Still another object of the present invention is to provide a reusable paper cup with an airtight ultrasonically sealed premix preservation system with a tamper-proof airtight compartment to ensure the hygiene and safety of premixes, preventing accidental contamination or spillage during use.

[0032]

[0028] The further object of the present invention is to provide a reusable paper cup with an airtight ultrasonically sealed premix preservation system with an innovative design that maintains the quality of hygroscopic ingredients in challenging storage conditions, such as high humidity or temperature fluctuations, ensuring consistent flavor and performance during beverage preparation.

[0033]

[0029] Still another object of the present invention is to provide a reusable paper cup with an airtight ultrasonically sealed premix preservation system that offers longevity, affordability, and an eco-friendly manufacturing process contributing to a more sustainable lifestyle choice for consumers, aligning with growing environmental concerns and ethical consumerism trends.

[0034]

[0030] The further object of the present invention is to provide a reusable paper cup with an airtight ultrasonically sealed premix preservation system that does not require training for use and can be used easily.

[0035]

[0031] Another object of the present invention is to provide a reusable paper cup with an airtight ultrasonically sealed premix preservation system that can be manufactured on a large scale for public use.

[0036] SUMMARY OF THE INVENTION

[0037]

[0032] According to the present invention, there is a reusable paper cup with an airtight ultrasonically sealed premix preservation system that is structured to preserve the freshness and quality of hygroscopic premix ingredients while offering heat resistance, durability, and reusability. The reusable paper cup comprises a primary paper cup body and an integrated polypropylene (PP) bucket positioned at the base of the paper cup. The PP bucket is ultrasonically sealed to the base of the paper cup, forming an airtight and moisture-proof compartment for storing the premix. The ultrasonic sealing process utilizes high-frequency sound waves to securely fuse the PP bucket to the paper cup base, preventing any ingress of air or moisture into the compartment. Following the integration of the PP bucket, a precise quantity of hygroscopic premix ingredients, that may be tea, coffee, milk powder, or sugar, is dispensed into the PP bucket using a weighmetric filling machine. An aluminum foil layer is then placed over the opening of the PP bucket and fused using heat-sealing technology to ensure an additional layer of airtightness and protection. The heat-sealed aluminum foil acts as a safeguard, preventing contamination and extending the shelf life of the premix for up to 9 months. The present invention is a novel upgrade on the existing state of the art as it addresses the shortcomings of conventional paper cups, including moisture penetration, lack of airtight sealing, and limited durability while ensuring the freshness, safety, and usability of stored premixes. The reusable design further contributes to sustainability and aligns with the growing consumer demand for eco-friendly packaging solutions.BRIEF DESCRIPTION OF THE DRAWINGS

[0038]

[0033] A reusable paper cup with an airtight ultrasonically sealed premix preservation system, according to a preferred embodiment of the present invention, as herein described and illustrated in the accompanying drawings,

[0039] FIG. 1- illustrates a perspective view of a reusable paper cup with an airtight ultrasonically sealed premix preservation system,

[0040] FIG. 2- illustrates a sectional isometric view of the ultrasonic fusing process of a reusable paper cup with an airtight ultrasonically sealed premix preservation system,

[0041] FIG.3- illustrates a side perspective view of the premix dispensing process of a reusable paper cup with an airtight ultrasonically sealed premix preservation system,

[0042] FIG.4- illustrates a rear view of a reusable paper cup with an airtight ultrasonically sealed premix preservation system, and

[0043] FIG.5- illustrates a front sectional view of a reusable paper cup with an airtight ultrasonically sealed premix preservation system.

[0044] DETAILED DESCRIPTION OF THE INVENTION

[0045]

[0034] A reusable paper cup with an airtight ultrasonically sealed premix preservation system of the present invention is described with numerous specific details so as to provide a complete understanding of the invention. However, these specific details are exemplary details and should not be treated as a limitation to the scope of the invention. Throughout this specification, the word “comprise” or variations such as “comprises or comprising”, will be understood to imply the inclusions of a stated element, integer or step, or group of elements, integers, or steps, but not the exclusions of any other element, integer or step or group of elements, integers or steps.

[0046]

[0035] Referring to the drawing, particularly Fig. 1, a perspective view of a reusable paper cup with an airtight ultrasonically sealed premix preservation system is shown. The reusable paper cup (1)comprises a paper cup base (2) and an internal polypropylene (PP) bucket (3), which together form an airtight and moisture-proof storage system designed for hygroscopic premix (4) preservation. The paper cup (1) functions as the outer structural support, providing the appearance, usability, and portability of a standard recyclable cup while internally incorporating a sealed storage compartment for beverage premixes. The polypropylene (PP) bucket (3) is securely positioned at the bottom interior of the paper cup (1), resting on the paper cup base (2). This PP bucket (3) is made of food-grade, high-temperature-resistant polypropylene, ensuring durability and safety when exposed to boiling water temperatures ranging from 180°C to 200°C. Further, the PP bucket (3) is permanently ultrasonically sealed to the paper cup base (2) using an ultrasonic sealing anode (6). This ultrasonic fusion process generates high-frequency sound waves, which cause localized heat and pressure at the interface of the PP bucket (3) and paper cup base (2). As a result, the materials are melted and bonded, creating an airtight, leak-proof seal that prevents moisture ingress and external contamination. Inside the PP bucket (3), a hygroscopic premix (4) is stored. This premix (4) may include powdered tea, coffee, milk powder, sugar, or other beverage formulations, all of which are highly sensitive to moisture and air exposure. The airtight and moisture-resistant nature of the PP bucket (3) ensures that the premix remains fresh, clump-free, and ready for consumption over an extended shelflife. To provide an additional protective barrier, an aluminum foil (5) covering is placed over the PP bucket (3). This aluminum foil (5) covering is heat-sealed onto the PP bucket (3) using a heat sealer, ensuring that the stored premix (4) remains completely isolated from environmental humidity and oxidation. The aluminum foil (5) also functions as a tamper-evident seal, preventing premature exposure of the premix (4) before intended use. Therefore, the present invention introduces a novel and practical solution for on-the-go beverage preparation. Unlike conventional disposable cups, which fail to provide long-term storage for moisture-sensitive premixes, the present invention integrates a dedicated storage chamber that preserves beverage freshness, enhances convenience, and ensures durability under high-temperature conditions.

[0047]

[0036] Referring to Fig. 2, a sectional isometric view of the ultrasonic fusing process of a reusable paper cup with an airtight ultrasonically sealed premix preservation system is shown. This figure illustrates the ultrasonic bonding between the polypropylene (PP) bucket (3) and the paper cup base (2) using an ultrasonic sealing anode (6) to create an airtight and moisture-resistantcompartment within the paper cup (1). The ultrasonic fusing process is a high-precision welding method that utilizes high-frequency sound waves to generate localized heat, causing the PP bucket (3) to bond seamlessly with the paper cup base (2). This fusion process eliminates the need for adhesives and ensures a strong, leak-proof connection that protects the contents of the cup from moisture, air exposure, and contamination. The ultrasonic sealing anode (6) applies high-frequency vibrations at the interface where the PP bucket (3) contacts the paper cup base (2). These mechanical vibrations create intense frictional heat at a microscopic level, softening the PP material without burning or degrading it. The localized melting of the PP bucket (3) and the inner surface of the paper cup base (2) allows them to fuse together, forming a homogeneous and durable seal. Once the required fusion temperature is reached, controlled pressure is applied, ensuring a uniform bond across the interface.

[0048]

[0037] Referring to Fig. 3, a side perspective view of the premix dispensing process of a reusable paper cup with an airtight ultrasonically sealed premix preservation system is shown. In this embodiment, a hygroscopic premix (4) is dispensed into the polypropylene (PP) bucket (3) housed within the paper cup (1) using a weighmetric filling machine. The hygroscopic premix (4) may comprise powdered formulations such as tea, coffee, sugar, milk powder, or other beverage-based compositions. Optionally, the premix may include flavored additives, plant-based substitutes, herbal extracts, or functional ingredients such as protein powders, vitamins, or probiotics, depending on the intended application. The dispensing process utilizes a weighmetric filling machine, which ensures precise and consistent filling based on load cell technology. The system detects the weight of the dispensed premix in real-time, ensuring that each cup (1) receives an accurate and predetermined quantity of ingredients. This process prevents underfilling or overfilling, maintaining quality control and uniformity across multiple units. Optionally, an alternative filling mechanism such as auger-based dispensing, volumetric filling, or vacuum-assisted dosing may be employed to accommodate different types of powders or granulated mixtures. Since the hygroscopic premix (4) is highly sensitive to moisture, humidity, and environmental contaminants, the weighmetric filling machine may be configured to operate in a dehumidified, temperature-controlled environment to prevent premature clumping or degradation of the premix. Additionally, a nitrogen flushing mechanism may optionally be integrated into the dispensing process to displace oxygen, further enhancing the shelf life of oxygen-sensitiveingredients. The dispensing nozzle of the weighmetric filling machine minimizes dust formation and static charge buildup, ensuring clean and efficient filling. Once the hygroscopic premix (4) is accurately dispensed into the polypropylene (PP) bucket (3), an aluminum foil (5) covering is carefully placed to create an airtight seal, as illustrated in Fig. 4.

[0049]

[0038] Referring to Fig. 4 and Fig. 5, a rear view and front sectional view of the reusable paper cup with an airtight ultrasonically sealed premix preservation system are shown, respectively. Fig. 4 illustrates the rear alignment of the aluminum foil (5) covering, which is placed securely over the polypropylene (PP) bucket (3). The aluminum foil (5) acts as a critical protective layer, ensuring that the hygroscopic premix (4) contained within the PP bucket (3) remains shielded from moisture, air, and external contaminants. This layer is precisely positioned to cover the entire opening of the PP bucket, forming a protective seal that guarantees the freshness of the premix inside, maintaining its quality until the moment of use. This aluminum foil (5) is then subjected to the heat sealing process via the heat sealer. The application of controlled heat and pressure creates a tight, secure bond between the foil (5) and the rim of the PP bucket (3). As a result, the foil (5) becomes fused to the PP bucket (3), forming a completely airtight and moisture-proof compartment. This seal ensures that no external moisture or air can penetrate the cup's interior, thereby maintaining the hygroscopic premix (4) in its optimal state, free from contamination. The fusion process guarantees that the cup retains its structural integrity and that the hygroscopic premix (4) remains stable for extended periods of time, even under varying storage conditions. Additionally, Fig. 5 illustrates a front-sectional view wherein the PP bucket (3) is securely placed at the bottom of the paper cup (1) and the hygroscopic premix (4) inside it. The aluminum foil (5) is clearly shown as a secure lid, tightly sealed around the PP bucket (3). The precise sealing of the foil over the PP bucket’s opening ensures that the premix remains completely protected from environmental factors such as humidity, air, or dirt. This guarantees that the premix retains its freshness and effectiveness, is free from moisture-related degradation, and preserves its long shelf life until it is ready for use. The PP bucket (3), being an integral part of the paper cup’s (1) design, also offers added structural strength, providing a robust barrier against external pressure during handling and transportation. The airtight nature of the seal created by the aluminum foil (5), in combination with the secure fusing of the PP bucket (3) to the paper cup base (2) via ultrasonicsealing (6), ensures that the cup remains durable, reliable, and perfectly suited for packaging a wide variety of premixes, that may be instant tea, coffee, or other flavoured beverage powders.

[0050]

[0039] In another embodiment, the aluminum foil covering (5) could be replaced by other sealing materials, such as biodegradable films or polymer-based barrier materials, that offer equivalent protection against moisture and air infiltration. Such materials could align with sustainable product design practices, providing additional environmental benefits while still maintaining the cup's integrity.

[0051]

[0040] The present invention is designed to offer the ultimate convenience and preservation. It features a lightweight structure, with the paper cup (1) secured with PP bucket (3) thereby providing the necessary strength to hold the premix securely while ensuring ease of handling. The airtight seal provided by the aluminum foil (5) and ultrasonic sealing (6) maintains the stability and freshness of the contents for extended periods, making the product ideal for on-the-go consumption or long-term storage. Moreover, the invention is reusable and is designed for sustainability. The materials used in its construction, including the paper cup (1), PP bucket (3), and aluminum foil (5), are all recyclable, ensuring that the cup can be disposed of in an environmentally responsible manner once it has been used.

[0052]

[0041] The functioning of the present device is understood in the following steps. The paper cup (1) acts as the outer structural component, designed to hold a polypropylene (PP) bucket (3) securely at its base (2). This PP bucket (3) serves as the dedicated storage compartment for the hygroscopic premix (4), protecting it from external moisture and contaminants. The premix is dispensed into the PP bucket (3) using a weighmetric filling machine (7) to ensure precise and consistent portioning. To create an airtight enclosure, the ultrasonic sealing anode (6) applies high-frequency ultrasonic waves, fusing the PP bucket (3) to the paper cup base (2) at a molecular level, forming a secure and moisture-resistant bond. This advanced sealing process ensures that the hygroscopic premix (4) remains dry and uncontaminated over an extended period. Once sealed, the aluminum foil covering (5) is carefully placed over the PP bucket (3) and firmly fused using a heat sealer (8). This secondary protective barrier not only prevents air and moisture infiltration but also ensures the integrity of the premix until it is ready for use. The PP bucket (3) is designed towithstand high temperatures, ensuring that when hot water is poured into the cup, the premix dissolves efficiently without compromising the structure of the cup. This innovative system offers a reusable, sustainable, and user-friendly solution, eliminating the need for separate sachets or additional storage containers. The present invention effectively enhances convenience, preserves freshness, and ensures hygiene, addressing the challenges of conventional premix packaging while promoting environmental sustainability through its reusable design.

[0053]

[0042] Thus, a reusable paper cup with an airtight ultrasonically sealed premix preservation system that is the present invention has the following advantages:

[0054] 1. The present invention ensures long-term freshness of hygroscopic premix ingredients by preventing air and moisture ingress through an airtight ultrasonically sealed polypropylene (PP) bucket, preserving flavor and quality.

[0055] 2. The present invention is designed to withstand high temperatures (up to 180-200°C) without structural degradation, ensuring safe use for hot beverage preparation.

[0056] 3. The disclosed invention enhances user convenience by integrating a pre-measured premix directly within the cup, eliminating the need for separate storage sachets or additional preparation steps.

[0057] 4. The present invention eliminates the need for adhesives or synthetic chemical binders by employing ultrasonic sealing technology, ensuring safe, non-toxic, and eco-friendly storage.

[0058] 5. The present invention is lightweight, stackable, and easy to handle, making it ideal for large-scale commercial use while maintaining the integrity of the stored premix.

[0059] 6. The present invention promotes eco-friendliness by offering a reusable and recyclable solution, reducing single-use plastic waste commonly associated with traditional premix packaging.

[0060] 7. The present invention is versatile and adaptable, allowing for various premix formulations, including tea, coffee, soup powders, energy drinks, and nutritional supplements, ensuring wide-ranging applications.

[0061] 8. The dislocated invention involves lower manufacturing costs and, thus is more accessible and affordable to end users.

[0062] 9. The present invention requires less manual effort and less time for the user to operate.10. The system is cost-effective to manufacture and hence can be easily produced on a large scale for public use.

[0063]

[0045] Certain features of the invention have been described with reference to the example embodiments. However, the description is not intended to be construed in a limiting sense. Various modifications of the example embodiments as well as other embodiments of the invention, which are apparent to the persons skilled in the art to which the invention pertains, are deemed to he within the spirit and scope of the invention.

Claims

CLAIM1. A reusable paper cup with an airtight ultrasonically sealed premix preservation system, comprising:a paper cup (1) having a paper cup base (2) so as to contain liquid beverages; a polypropylene (PP) bucket (3) secured at the base (2) of the paper cup (1) so as to form an airtight compartment for storing a hygroscopic premix (4); andan ultrasonic sealing mechanism securing the PP bucket (3) to the base (2) so as to ensure a moisture-resistant and tamper-proof seal; anda dispensing mechanism configured to allow controlled release of the premix (4) upon user activation.

2. A reusable paper cup with an airtight ultrasonically sealed premix preservation system as claimed in claim 1, wherein the PP bucket (3) comprise a food-grade, heat-resistant material that withstands temperatures up to 200°C without deformation or compromise of the airtight seal.

3. A reusable paper cup with an airtight ultrasonically sealed premix preservation system as claimed in claim 1 , wherein the ultrasonic sealing mechanism is configured to form a hermetic bond by molecular fusion of the PP bucket (3) to the base (2), eliminating the need for adhesives or additional sealing agents.

4. A reusable paper cup with an airtight ultrasonically sealed premix preservation system as claimed in claim 1 , wherein the premix (4) may be tea, coffee, sugar, flavored beverage powders, nutritional supplements, herbal infusions, electrolyte mixes, protein-based formulations, dehydrated milk, plant-based drink powders, medicinal formulations, or any combination thereof.A reusable paper cup with an airtight ultrasonically sealed premix preservation system as claimed in claim 1 , wherein the airtight seal comprises an aluminum foil (5) covering, that may be optionally replaced with a biodegradable polymer film, food-grade plastic laminate, wax-coated paper, or a composite multilayer barrier to provide equivalent moisture resistance and structural integrity.

Images