FIELD OF THE INVENTION
The present invention pertains to an insulated, stainless-steel lunchbox designed to enhance the cooling performance and food safety of packed lunchboxes. Specifically, this invention is intended for school-aged children and working individuals who pack lunches to carry to school or work. Additionally, it caters to environmentally conscious consumers seeking long-lasting, plastic-free lunchbox alternatives with a retro aesthetic.
BACKGROUND OF THE INVENTION
Lunchboxes have been an integral part of human culture for generations and are known. These portable containers have evolved over the years, serving as a means to transport and store meals, snacks, and sustenance. While their primary purpose remains the same, the designs, materials, and features of lunchboxes have evolved to cater to the diverse needs and preferences of users. The concept of carrying food in portable containers dates back to ancient civilizations. In Egypt, for instance, workers would carry their midday meals in reed baskets or pottery jars. Similarly, ancient Romans used metal containers to carry their food on long journeys. However, the lunchbox as we know it today began to take shape in the late 19th century. The first recognizable lunchboxes were made of metal, often tin or steel, and were introduced in the United States in the 1880s. They were initially designed for workmen and laborers who needed a convenient way to bring their meals to job sites. These early lunchboxes were plain and functional, lacking the decorative features that would become synonymous with lunchboxes in the years to come. The mid-20th century saw the emergence of what is now referred to as the “Golden Era” of lunchboxes. During this time, lunchboxes became a popular accessory for children heading to school. They often featured colorful designs with popular cartoon characters, superheroes, and celebrities. Some of the most iconic lunchboxes from this era include the Mickey Mouse, Superman, and The Beatles lunchboxes. Manufacturers embraced creativity and innovation, introducing new materials and shapes. One of the most significant developments was the shift from metal to plastic lunchboxes, which were lighter and more affordable. Plastic also allowed for a broader range of shapes and designs, fueling the collectible craze among children and adults alike. Beyond their practical use, lunchboxes became a cultural phenomenon and a reflection of popular trends and interests. They were a form of self-expression, allowing individuals to showcase their favorite characters, hobbies, or affiliations. Lunchboxes served as a status symbol, with some children eagerly comparing their lunchbox designs with their peers.
Several prior attempts to deal with such problems have been utilized as set forth below.
U.S. Pat. No. 8,328,034B2 to Miros et al. discloses a lunchbox for storing and transporting food in such a manner that it will not spill or comingle. The lunch box has attachable elements that allow the lunch box to be customized to the individual owner. The lunch box can be made of a durable material and used repeatedly, for example reducing waste associated with disposable food containers. The lunch box may be used on a daily basis for taking food to school, work, and other destinations.
United States Patent Publication No. 20060201950A1 to Wen-Tao Liu discloses a lunch box comprising: a receptacle and a cover able to cover the receptacle. The receptacle is provided therein with partitions to divide the receptacle into a plurality of receiving spaces; in which a receiving space is used to store therein soup, and the remaining spaces are used to store therein cooked rice or repast. And in which the cover is formed thereon downwardly recessed areas in corresponding to and in opposition respectively to the receiving spaces of the receptacle; the bottoms or peripheries of the receiving spaces of the cover and the partitions of the receiving spaces of the receptacle at the positions opposite respectively to those of the bottoms or peripheries are provided with engaging means for mutual engaging, so that the cover and the receptacle can be tightly engaging with each other to prevent spilling of soup or food juices.
U.S. Pat. No. 10,271,672B1 to Yen et al. discloses a food storage container that has one or more water tight compartments. The food storage container can have an insulated component that can maintain food at substantially constant temperature over a relatively long period of time. The insulated component from moving or rotating when in use. The insulated component can be removed. The insulated component can have a lid with an opening lever feature that makes it easy for users to open the lid. The food storage container can have a removable divider that can be used to create a plurality of smaller compartments. The food storage container can have a latch and hinge assembly to close the lid and tray. The food storage container can have an integral handle to provide a carrying solution.
While lunchboxes have evolved over the years, there have always been inherent challenges—chiefly, the struggle to maintain food safety and ideal temperatures for our meals. Traditional lunchboxes, whether made of plastic or metal, have often fallen short in several areas. That's where the Insulated Stainless-Steel Lunchbox enters the scene, offering a groundbreaking solution that revolutionizes the lunchbox experience. Most traditional lunchboxes rely on basic insulation materials, such as foam or plastic walls, and occasionally include ice packs. While they might keep food relatively cool for a short time, they typically fail to maintain consistent temperatures throughout the day. This poses a significant food safety risk as perishable items can quickly reach unsafe temperatures. Lunchboxes endure daily wear and tear, including drops, impacts, and rough handling due to which traditional plastic lunchboxes can crack, break, or lose their seals over time, compromising their longevity. Many plastic lunchboxes are porous and can absorb odors and stains over time. Cleaning them thoroughly can be challenging, potentially leading to hygiene concerns. As the world becomes increasingly environmentally conscious, the use of single-use plastics in lunchboxes has come under scrutiny. Disposing of disposable plastic containers contributes to plastic waste, which has detrimental effects on the environment.
The Insulated Stainless-Steel Lunchbox disclosed below represents a paradigm shift in addressing these longstanding issues. None of the previous inventions and patents, taken either singly or in combination, describe the invention as claimed. Hence, the inventor of the present invention proposes to resolve and surmount existent technical difficulties to eliminate the aforementioned shortcomings of prior art. Here's how the current invention stands out:
- Superior Insulation with Vacuum Insulated Panels (VIPs): The innovation that sets this lunchbox apart is its use of Vacuum Insulated Panels (VIPs). These panels are strategically placed between the dual layers of food-grade stainless steel that make up the lunchbox's base, sides, and lid. VIPs are renowned for their exceptional thermal insulation properties, allowing this lunchbox to maintain lower and more stable temperatures throughout the day. This, in turn, ensures food safety, preventing perishable items from reaching room temperature.
- Unparalleled Durability: Stainless steel is known for its exceptional durability. The dual-shell design of the Insulated Stainless-Steel Lunchbox enhances its robustness, making it a reliable companion for daily use. It can withstand the rigors of school or work life, from accidental drops to rough handling.
- Hygienic and Easy to Clean: Stainless steel is non-porous and easy to clean, making it a hygienic choice for food storage. It doesn't absorb odors or stains, and a quick wipe down is all it takes to keep it looking and smelling fresh.
- Environmental Friendliness: As the world moves towards sustainability, the Insulated Stainless-Steel Lunchbox stands out as an eco-friendly alternative. It is reusable and eliminates the need for disposable plastic containers, reducing plastic waste and contributing to environmental conservation efforts.
The Insulated Stainless-Steel Lunchbox doesn't just solve existing problems, it reimagines the lunchbox concept. With its exceptional insulation, durability, hygiene, and eco-friendliness, it caters to the needs of school-aged children and adults who rely on packed meals. It combines functionality with aesthetics, featuring a pleasing retro design and customizable artwork. In an era where food safety, environmental consciousness, and convenience are paramount, the Insulated Stainless-Steel Lunchbox paves the way for a lunchbox revolution. It ensures that our packed meals remain safe, fresh, and environmentally responsible-a true game-changer in the world of lunchboxes.
SUMMARY OF THE INVENTION
The present invention is an Insulated Stainless-Steel Lunchbox designed to address common challenges associated with traditional lunchboxes, particularly in terms of maintaining food safety and temperature control. Both the base and the lid of the lunchbox are meticulously molded from stainless steel. This material choice ensures the lunchbox's durability, resistance to wear and tear, and, most importantly, its safety for storing food. Unlike many traditional lunchboxes, which consist of single-layer constructions, this invention features a dual-shell design for both the base and the lid. Each shell is molded separately and then securely fused. This not only enhances the lunchbox's structural integrity but also contributes to its robustness, making it capable of withstanding everyday use.
The standout feature of this lunchbox is the incorporation of Vacuum Insulated Panels (VIPs). These panels are precisely sized and placed between the two layers of stainless steel in the base, sides, and lid. VIPs are renowned for their exceptional thermal insulation properties, far surpassing traditional insulation materials. By utilizing VIPs, the lunchbox can maintain stable and lower temperatures throughout the day, which is crucial for ensuring food safety. To further enhance its insulation capabilities, the lunchbox incorporates a silicone beading or gasket around the perimeter of both the lid and the base. This sealing mechanism creates an airtight closure, minimizing heat exchange with the external environment.
In an embodiment of the present invention, the lunchbox has a retro rounded-square design, which not only contributes to its aesthetic appeal but also provides practicality in terms of storage and portability. Some embodiments of the lunchbox feature customizable internal compartments, allowing users to organize their meals conveniently. These compartments can be adapted to different meal types and portion sizes.
In certain embodiments of the present invention, the lunchbox may include a retractable or foldable handle for ease of carrying, making it a convenient companion for school-aged children and working individuals.
In some embodiments of the present invention, the advanced versions of the lunchbox may incorporate a built-in temperature indicator or digital thermometer on the lid's interior surface. This feature allows users to monitor the internal temperature of their lunchbox.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The aforesaid as well as other objects and advantages of the invention will appear hereinafter from the following description taken in connection with the accompanying drawings in which:
FIG. 1 illustrates an exemplary perspective view embodiment of the insulated stainless steel lunchbox;
FIG. 2 illustrates an exemplary front view embodiment of the insulated stainless steel lunchbox;
FIG. 3 illustrates top view embodiment of the insulated stainless steel lunchbox;
FIG. 4 illustrates an exemplary view embodiment of the inner view of the insulated stainless steel lunchbox showing compartments;
FIG. 5 illustrates side view of the bottom part of the insulated stainless steel lunchbox;
FIG. 6 illustrates an exemplary embodiment illustrating various sizes of insulated stainless steel lunchbox;
FIG. 7 illustrates an exemplary embodiment illustrating various views of the bottom part of insulated stainless steel lunchbox; and
FIG. 8 illustrates an exemplary embodiment illustrating various views of the lid or top part of insulated stainless steel lunchbox;
DETAILED DESCRIPTION OF THE INVENTION
Additional features and advantages of the invention will be outlined in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. These and other features of the present invention will become more fully apparent from the following description or may be learned by the practice of the invention as set forth hereinafter.
With reference from FIG. 1 to FIG. 3 thereof, embodiment 100, 200 and 300 of the insulated stainless steel lunchbox are disclosed wherein the lunchbox is designed with a strong emphasis on environmental consciousness and practicality, catering to individuals who lead an active lifestyle and are committed to reducing their carbon footprint. The primary material used in this embodiment is a specially sourced, sustainably produced stainless steel (SS304 or equivalent) which ensures the lunchbox's safety for food storage but also aligns with the values of eco-conscious consumers. The Vacuum Insulated Panel (VIPs) integrated into the lunchbox's structure are made from recyclable materials, reinforcing its eco-friendliness. The top of the lunchbox features artwork inspired by nature, such as forests, oceans, or wildlife. This design choice serves as a reminder of the importance of environmental conservation. The lunchbox boasts an earth-toned exterior finish, further highlighting its eco-friendly identity and harmonizing with its natural artwork. Instead of using adhesives or stickers for branding, the logo is embossed directly into the stainless steel, reducing the need for additional materials. The lunchbox is composed of two main components: the base and the lid, which are either separately molded and fused or manufactured as a single unit. The lid features a recessed groove to support an effective sealing mechanism. For insulation Vacuum Insulated Panels (VIPs) are integrated into the lunchbox's design. These VIPs are strategically placed within the lunchbox's structure. They line the base, sides, and interior of the lid, as well as the base surface and inner lid surface. When the lunchbox is closed, the VIPs create a thermal barrier that prevents the transfer of heat between the interior and exterior of the lunchbox. The VIPs act as a barrier against external temperature fluctuations. In hot weather, they prevent heat from entering the lunchbox, ensuring that the contents remain cool. Conversely, in cold conditions, they help retain warmth, keeping hot meals at an optimal temperature. Compared to traditional insulation materials like foam or plastic, VIPs offer superior insulation. They maintain the desired temperature for a longer period, which is especially crucial for keeping food safe and appetizing, whether it's for school lunches or workday meals. The recessed groove in the lid, combined with silicone beading, establishes an airtight seal when the lunchbox is closed. This sealing mechanism is essential for temperature maintenance and ensures that the contents remain at the desired temperature throughout the day. The primary novelty of this embodiment lies in its use of Vacuum Insulated Panels (VIPs) within a stainless-steel lunchbox. This design significantly enhances insulation, surpassing traditional lunch storage methods and maintaining food safety. By addressing food safety concerns through superior insulation and eliminating the need for disposable plastic containers, this embodiment aligns with the dual objectives of food safety and environmental sustainability. The stainless-steel construction ensures durability, resisting wear and tear. Additionally, the incorporation of customizable artwork and a retro design adds aesthetic appeal, making this lunchbox appealing to a wide range of users.
The insulated stainless steel lunchbox is equipped with a durable, ergonomically designed handle 102. This handle 102 is securely attached to the top of the lunchbox allowing for comfortable carrying and transport. The handle, 102, is thoughtfully designed to ensure a comfortable grip, making it easy for users, including school-aged children and adults, to carry their lunchboxes without straining their hands or fingers. In some embodiments, the handle, 102, may be made from the same high-quality stainless steel as the rest of the lunchbox, ensuring durability and a cohesive aesthetic. It is firmly attached to the lunchbox's lid for stability and longevity. The Insulated Stainless-Steel Lunchbox features a robust and reliable locking mechanism 104 that ensures that the lunchbox remains securely closed during transport, preventing accidental spills or temperature loss. The locking mechanism 104 consists of a clasp or latch, often made from stainless steel or a similarly durable material strategically placed on the front or side of the lunchbox, within easy reach. To close the lunchbox securely, users simply engage the clasp or latch creating an airtight seal, similar to the primary sealing mechanism, ensuring that the interior temperature remains stable. It minimizes the risk of accidental spills or the lunchbox unexpectedly opening during transit.
With reference from FIG. 4 to FIG. 6 thereof, embodiment 400, 500, and 600 of the compartments of insulated stainless steel lunchbox is disclosed revealing a well-organized layout, optimizing space for food storage while maintaining temperature control. It consists of two primary compartments, the main compartment is spacious and capable of holding a variety of food items, including sandwiches, fruits, and containers of various sizes. This area is where the primary temperature control is maintained with the help of vacuum insulated panels (VIPs). Located beneath the main compartment, the secondary compartment, is designed to hold smaller items such as utensils, napkins, or condiment packets. This compartment is thoughtfully divided with removable dividers, allowing users to customize the space as needed. The interior compartments of the Insulated Stainless-Steel Lunchbox are meticulously designed to accommodate a variety of food items while maintaining organization and temperature control. The lunchbox is available in different size variations, offering medium and large options for the bottom part allowing users to choose the lunchbox that best suits their needs, whether for a child's lunch or an adult's meal. The medium-sized lunchbox provides a compact yet spacious interior for school-aged children, while the large-sized lunchbox offers more storage capacity for adults or individuals with larger appetites. The interior of the lunchbox is arranged with compartments of varying sizes and arrangements to accommodate different types of food items. In an alternative embodiment of the present invention, users can customize the arrangement of compartments based on their specific needs. Removable dividers allow for flexibility in organizing food items. For example, a larger compartment may be used for sandwiches, while smaller sections can hold snacks, fruits, or condiments. The compartments are strategically designed to hold specific types of food items securely. For example, a dedicated section may be included for utensils, ensuring they don't come into contact with food. The interior compartments may be made from various materials to suit different food items and facilitate easy cleaning. Some compartments may be constructed from stainless steel, ensuring food-grade safety and durability. Stainless steel compartments are ideal for holding items that need to be kept cool or warm. Other compartments, particularly those used for items like fruit slices or moist snacks, may be made from food-safe plastic or silicone. These materials are easy to clean and prevent flavor transfer. Some compartments within the lunchbox may be designed with sealable lids or covers. These lids provide an additional layer of protection against spills and help maintain the freshness of certain food items. Compartments with sealable lids ensure that liquids like soups or yogurt remain securely sealed within the compartment, preventing spills and leaks. These lids also contribute to temperature control by preventing temperature exchange between compartments, ensuring that hot foods stay hot and cold foods stay cold. A ledge or lip is included in the bottom part of the lunchbox to support the interior compartments, including the stainless steel food tray. The ledge or lip ensures that the compartments and trays remain securely in place, preventing shifting or tilting of food items during transit. It also facilitates organization within the lunchbox, helping users keep their meals neatly arranged and separated.
With reference to the FIG. 7 thereof, an exemplary embodiment 700 of the bottom part of the insulated stainless-steel lunchbox is illustrated, that is carefully designed to maximize insulation, durability, and user friendliness. The bottom part of the lunch box consists of two stainless steel layers forming the foundation of the lunchbox, providing structural integrity, durability, and the base for insulation. The stainless steel used is of food-grade quality (typically SS304 or equivalent) to ensure safety and hygiene in food storage. The use of two layers enhances the lunchbox's strength and thermal resistance, contributing to its long lifespan. Sandwiched between the two stainless steel layers is a Vacuum Insulated Panel (VIP) 704. The VIP 704 serves as an insulating barrier, minimizing the transfer of heat between the interior and exterior of the lunchbox. The VIP 704 is adhesively attached to inner surface of one of the stainless steel layers ensuring it remains securely in place. The base and sides of the lunchbox are seamlessly joined by welding, chemical adhesion, or other suitable methods to form a sturdy and watertight connection. Welding the base to the sides creates a robust bond that is both durable and hermetic ensuring that there are no gaps through which heat or moisture can penetrate. Alternatively, chemical adhesion methods may be used, employing food-safe adhesives to create a secure and moisture-resistant bond between the base and sides. At the top of the lunchbox base, a recess or groove 702 is pressed into the stainless steel to support the sealing mechanism. This groove is integral to maintaining an airtight seal when the lunchbox is closed. The recess or groove provides a designated space for the sealing mechanism, such as silicone beading, to fit snugly ensuring that when the lunchbox is closed, a secure seal is established, preventing temperature fluctuations and leaks. A ledge or lip is incorporated into the bottom part of the lunchbox to support the interior compartments, specifically the stainless steel food tray. The ledge or lip acts as structural support for the food tray, preventing it from shifting or tilting when the lunchbox is in transit. It ensures that the interior compartments remain well-organized, with the food tray securely in place. This is particularly important for keeping different food items separated and preventing them from coming into contact during transport.
With reference to the FIG. 8 thereof, an exemplary embodiment 800 of the lid or top part of the insulated stainless-steel lunchbox is illustrated wherein the lid/top consists of two stainless steel layers, just like the base providing structural integrity, insulation, and a base for the lid's design features. Within the lid/top, a Vacuum Insulated Panel (VIP) 806 is sandwiched between the two stainless steel layers acting as a highly efficient insulating material. The VIP serves as a thermal barrier, minimizing heat transfer between the interior and exterior of the lunchbox. The VIP 806 is adhesively attached to the inner surface of one of the stainless steel layers within the lid/top. This ensures the VIP 806 remains securely in place. In the central part of the lid/top, a recessed is incorporated to hold artwork as a decorative feature. This area allows for customization and personalization of the lunchbox's exterior. The recessed area 802 is designed to perfectly accommodate artwork, which can be attached using various methods, such as magnets, vinyl or woodcut stickers, or other viable options. This feature adds a personal touch to the lunchbox's design. The recessed area 802 protects the artwork from external elements and physical damage while maintaining a flush and smooth surface for the rest of the lid/top. On the underside of the lid/top, a protrusion or channel 804 is designed to facilitate leak-proof sealing to the bottom of the lunchbox ensuring that when the lunchbox is closed, it creates an airtight and watertight seal, preventing spills and temperature fluctuations. The protrusion or channel houses a sealing feature, such as a silicon bead or gasket, which is in direct contact with the top edge of the base of the lunchbox. When the lunchbox is closed, the sealing feature engages with the recessed groove on the top of the lunchbox base. This creates an airtight and leak-proof seal, ensuring that the interior temperature remains stable and preventing any liquid or food from leaking out.
The Insulated Stainless-Steel Lunchbox offers a range of advantages that make it a highly desirable lunch storage solution for school-aged children and environmentally conscious adults. Here's a detailed breakdown of its key advantages:
- Superior Insulation: The integration of Vacuum Insulated Panels (VIPs) within the lunchbox ensures outstanding thermal insulation. It effectively maintains the desired temperature of packed meals, keeping food either hot or cold for extended periods.
- Food Safety: The lunchbox addresses food safety concerns by preventing temperature fluctuations that could lead to spoilage or bacterial growth. This feature is particularly crucial for school lunches and workday meals.
- Stainless Steel Construction: The use of high-quality stainless steel for both the base and lid ensures durability. Stainless steel is resistant to dents, scratches, and corrosion, making the lunchbox a long-lasting investment.
- Plastic-Free: In an era of environmental consciousness, the absence of plastic components contributes to the lunchbox's longevity, as it is less prone to wear and tear compared to plastic alternatives.
- Reduction of Plastic Waste: By eliminating the need for disposable plastic containers, the lunchbox aligns with eco-friendly principles and reduces personal environmental impact. It encourages a shift away from single-use plastics.
- Sustainable Materials: The use of stainless steel, which is recyclable, further enhances the eco-friendliness of the lunchbox. Stainless steel is known for its recyclability and minimal environmental impact.
- Artwork Options: The lunchbox's customizable artwork feature allows users, especially children, to express their individuality and personal preferences by decorating the top of the lunchbox with magnets, stickers, or other attachments.
- Retro Aesthetic: The lunchbox's retro rounded-square design adds a touch of nostalgia and style, appealing to users of all ages.
- Handle and Locking Mechanism: The addition of a handle and a secure locking mechanism enhances the lunchbox's usability. The handle makes it easy to transport, while the locking mechanism prevents accidental spills and ensures food remains secure during transit.
- Interior Organization: The interior compartments, with various sizes and customizable arrangements, provide convenience and organization for packing a variety of meal components. They prevent food items from mixing or shifting during transport.
- Compact Design: Despite its robust insulation, the lunchbox maintains a sleek and space-efficient design. It maximizes interior storage space while minimizing bulk, making it easy to carry and store.
- Food-Grade Materials: The use of food-grade stainless steel ensures that the lunchbox is safe for storing and transporting food. It doesn't leach harmful chemicals or flavors into the contents.
- Easy to Clean: Stainless steel and certain compartment materials, like plastic or silicone, are easy to clean and maintain hygiene, ensuring the lunchbox is suitable for daily use.
While the exemplary embodiments of the present invention are described and illustrated herein, it will be appreciated that they are merely illustrative. It will be understood by those skilled in the art that various modifications in form and detail may be made therein without departing from or offending the spirit and scope of the invention as defined by the appended claims. Additionally, the invention illustratively disclosed herein suitably may be practiced in the absence of any element which is not specifically disclosed herein—and in particular, embodiment specifically contemplated, is intended to be practiced in the absence of any element which is not specifically disclosed herein.
Patent Application
20240308753
