VACUUM-SEALED CANNING LID WITH SPOILAGE INDICATOR AND ACTIVE PROTECTIVE LAYER.

Abstract

This invention enables food products to be preserved safely for extended periods and prevents spoilage. It involves a multi-layered canning lid system that visually informs the user. The cover, which is the subject of the invention, is integrated onto a metal body (1); resistant to oxygen or pH changes. responsive degradation indicator layer (2), antioxidant or gas trap in microcapsule structure active protective layer containing components (3) which changes color and shape when vacuum pressure is reduced vacuum indicator (4), protective liner layer (5) preventing contact between metal and food It contains a structure that absorbs spoilage gases such as oxygen and ethylene from the food. It also alerts the user with a color change. In case of vacuum loss, both mechanical deformation occurs. Both a color and a color signal are generated. The system operates passively without requiring any power source. It works and can be easily integrated into existing canning lid production lines. Additionally, the lid itself... Digital traceability can be ensured thanks to the integrated QR code or NFC tag (6). This allows food spoilage to be detected at an early stage, extending shelf life and increasing consumer safety.

Description

1 TARIFF 5 VACUUM-SEALED CONTAINER WITH DETERIORATION INDICATOR AND ACTIVE PROTECTIVE LAYER. CAN LID International Patent Classification (IPC): B65D 41 / 04; B65D 81 / 20; G01N 33 / 12; G06K 19 / 07 10 Technological Field: This invention is a metal vacuum container used for the long-term preservation of food products. It relates to an improved version of the serve covers. Especially in home-based or small-scale production (e.g., tomato paste, jam, pickles, tomato sauce, etc.) 15 The lids used have a deterioration indicator, a vacuum indicator, and an active protective layer, especially. It enables the integration of the two within the same structure. State of the Art: The classic canning lids used today consist only of a metal body and a vacuum seal that closes inwards. It consists of a collapsed central region. As the air inside the jar cools, a vacuum forms, creating a leak-proof seal. This is ensured. However, small air leaks, gas accumulation due to fermentation, oxygen or ethylene can cause problems. Increased levels lead to food spoilage. In these systems, spoilage is usually manifested as lid bulging or It is noticeable if there is no "click" sound; in this case, the product is already defective. With current technology... A visual sensor that detects oxygen or pH changes, synchronized with a vacuum gauge. There is no active protective layer on the system or inner surface. Therefore, the existing covers... It cannot provide early warning and cannot actively extend shelf life. Purpose of the Invention: The aim of this invention is to add a spoilage indicator, a vacuum indicator, and 30 to the classic canning lid design. by integrating an active protective layer: 1. To visually detect spoilage in food at an early stage. 2. Monitoring oxygen, ethylene, and pH changes using passive sensors. 3. Actively absorbing harmful gases formed in food to extend its shelf life. 2 4. A passive, energy-efficient, and easily adaptable ka-5 The goal is to offer a package structure. Summary and Structural Components of the Invention: The invention, a canning lid, is a multi-layered system comprising the following essential components: 1. Metal Lid Body (1): Heat-resistant metal material compatible with the classic “twist-off” system. It is. 2. Deterioration Indicator Layer (2): A color-changing film sensitive to oxygen or pH changes. It consists of (for example, anthocyanin or bromthymol blue-based). Normally it is purple / green in color. It turns red or yellow when deterioration begins. The outer surface has low UV transmittance. 15 It is located under a transparent window. 3. Active Protective Layer (3): Microencapsulated anti- It is a polymer film containing oxidant or oxygen / ethylene scavenging components. Microcapsules are approximately 1– It is in the micrometer (µm) size range and provides controlled release. 4. Vacuum Indicator (4): Colored gel, pressure-sensitive film or thin 20 located in the center of the cap It has a metallic diaphragm structure. It changes color or shape when the vacuum pressure decreases. Deterioration. The indicator (2) and the vacuum indicator (4) work in sync. 5. Protective Liner Layer (5): Prevents contact between the metal body and food, made of epoxy or It is a PET-based, food-grade material. 6. QR or NFC Tag (6): Integrated onto the lid to indicate production date, vacuum status or 25 It provides digital access and traceability to degradation information. Working Principle: This structure monitors both mechanical (vacuum) and chemical (oxygen / pH) changes simultaneously. It signals the deterioration with an early warning signal. In lid production, the metal body is manufactured using the classic press method in 30... It is shaped. An active protective layer (3) is applied to the inner surface by film lamination or spray coating method. It is applied with heat. The deterioration indicator (2) is placed under the heat-resistant transparent window on the outer surface. After the jar filling and sealing process is complete, the internal pressure is reduced during the cooling process. The pressure decreases and the lid is pulled inward. When deterioration begins during the storage process, the gas pressure increases; a vacuum is created. 3 The indicator bulges, the deterioration indicator changes color. Simultaneously, the active protective layer 5 (3) absorbs free oxygen or ethylene. This delays spoilage, extends shelf life and benefits the user. receives a visual alert. Technical Effects and Benefits: - Shelf life is extended by approximately 20–30%. 10 - The spoilage status of the food is communicated to the user as an early warning through a color change. - Vacuum leaks are detected by a colored visual signal. - The system operates completely without energy and at low cost. - Easily integrated into production lines without requiring additional equipment. The combination of these features in a single cover makes a clear difference in current technology. 15 The invention is suitable for household, small-scale, and industrial use. For consumers, it offers visual safety, while for producers, it provides an economical solution that reduces food waste. Industrial Applicability: This invention relates to metal or polymer-based canning materials commonly used in food packaging production. The lids can be integrated into production lines without requiring additional equipment. The invention co- Nusu covers are produced in series using existing industrial methods such as pressing, lamination, and coating. It can be produced. The post-production cap can be used directly in packaging food products, saving additional energy. or operates passively without requiring an electronic system. Therefore, the invention is suitable for both household and 25 It is applicable in industrial-scale production and is practical, economical, and suitable for the packaging industry. It offers a sustainable solution. Explanation of the Figures: Figure 1: Layered structure diagram 30 Figure 2: Normal (vacuum) condition Figure 3: Situation where the malfunction indicator is active. Figure 4: The vacuum gauge bulging. 4 Figure 5: Deterioration indicator and vacuum indicator active status. Figure 6: Final breakdown and vacuum loss condition. Reference Numbers: 1. Metal cover body 2. Deterioration indicator layer 10 3. Active protective layer 4. Vacuum indicator 5. Protective liner layer 6. QR or NFC tag

Claims

REQUIREMENTS 5 1. It is a vacuum canning lid used for long-term preservation of food products. Its feature is a metal cover body (1), active integrated into the inner surface of the said body. protective layer (3), deterioration on the lid reacting to oxygen or pH changes indicator layer (2), vacuum that creates a color or shape change when vacuum pressure is reduced indicator (4), protective liner layer that prevents direct contact between the metal body and the food 10 (5) containing; single cover structure of active protective layer (3) and deterioration indicator layer (2) integrated within, it both visually indicates deterioration and detects substances like oxygen and ethylene. It involves creating a multi-layered, passively operating system that absorbs disruptive gases.

2. The canning lid specified in Claim 1, its characteristic; spoilage indicator layer (2) anthocyanin, 15 a polymer containing a pH indicator that changes color, such as bromthymol blue or methyl red It consists of a film.

3. The canning lid specified in Claim 1, its characteristic; active preservative layer (3) microcapsules contains natural antioxidants (e.g., ascorbic acid, green tea extract) or ethylene / oxygen scavengers 20 It contains components (e.g., zeolite-KMnO₄, iron oxide).

4. The canning lid specified in Claim 1 has the characteristic of being heat-resistant (3) of its active protective layer. Polymer film is applied to the inner surface of the lid by lamination or spray coating. It is the implementation. 25 5. The canning lid specified in Claim 1 has the feature that the vacuum indicator (4) is located in the center of the lid. The colored gel located beneath the domed region is a pressure-sensitive film or metal diaphragm structure. It is the presence of a vacuum and the resulting change in color and shape.

6. The canning lid specified in Claim 1 has the characteristic of being in contact with food; the protective liner layer (5) It contains compatible epoxy or PET-based material and provides complete insulation between the metal surface and the food. It is a verification.

7. The characteristic of the can lid specified in Claim 1 is that the spoilage indicator layer (2) is 35 on the outer surface. It is positioned so that it will be visible under a transparent window with low UV transmittance. 6 8. The canning lid specified in Claim 1 has the characteristic of; its active protective layer (3) is in the food environment 5 It provides controlled release of active ingredients in response to changes in humidity or temperature.

9. The canning lid specified in Claim 1 shall have the characteristic of being made of biodegradable polymer or composite. The same layer structure can be applied to alternative versions made from the same material.

10. The canning lid specified in Claim 1 has the following features: a QR code integrated onto the lid or Digital access to production date, vacuum status or spoilage information via NFC tag (6) and ensuring traceability.

11. The canning lid specified in Claim 1, with its feature; spoilage indicator (2) and vacuum 15 The indicator (4) works synchronously to provide simultaneous color changes.

12. The characteristic of the canning lid specified in Claim 1 is that the active preservative layer contains microcapsules. approximately 1–10 micrometers (µm) in diameter to provide time-controlled release. It is produced in a size of 20.