Leak Prevention in Package Design

Vacuum packaging machine with integrated sealing detection to improve reliability and efficiency. The machine has a vacuum chamber, heat sealing unit, and sealing detection unit all located inside the chamber. After vacuuming to a certain level, the chamber pressure is reduced further. During the pressure hold period, changes are monitored to determine if the sealed bag is leak-free. This ensures reliable sealing quality beyond just vacuum levels. The integrated design improves efficiency compared to separate vacuum, sealing, and inspection steps.

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An aluminum foil bag with improved sealing properties to preserve food and medicines. The bag has an inner layer of food-grade plastic film and an outer layer of aluminum foil. The unique sealing feature is the use of a desiccant material, like silica gel, between the inner and outer layers. This absorbs moisture and prevents air and bacteria from entering the bag, maintaining the quality and freshness of the contents.

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Leak-proof packaging box with improved protection against spills compared to conventional boxes. The box has a removable top cover, a waterproof bottom section with drainage holes, and an intermediate waterproof plate above the holes. This allows liquid to drain out if the bottom leaks but prevents it from spilling onto the contents inside. The bottom section is longer than the main box to provide extra leakage prevention. A waterproof gasket can also be used between the top cover and bottom plate.

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Packaging container for foods like prepared dishes that has a unique design to prevent bending, leaking, and lid coming loose. The container has an inner fitting part to securely hold the lid. Legs extending from the bottom and sides provide rigidity and prevent bending when lifting. The legs also have walls to prevent liquid flow to the inner fitting. The side wall is higher than the flange to prevent contents from protruding. This configuration ensures a secure, leak-proof fit and prevents container distortion.

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Quick-frozen food packaging device that allows quick and automated leakage detection of packaged frozen food. The device uses a cylinder-driven detection box with a sealed inner chamber and a rubber-covered opening at the bottom. When the cylinder pushes the box down, the rubber indents and changes the internal air pressure. An air pressure gauge measures this pressure to determine if the packaging leaks. This replaces manual inspection and allows fast leakage detection on all packaged frozen food.

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A packaging bag for liquid products like drinks that has a sealing mechanism and a detection mechanism to prevent leakage and contamination. The bag has a fixed connection between the top of the bag and the sealing mechanism. The sealing mechanism has a threaded cover, movable seal block, and inner mounting column. The seal block moves up when squeezed to let liquid flow through. When not in use, gravity pulls the seal block down to block the hole. This prevents external contaminants from entering or false products from being added. The bag also has a protective layer between the inner membrane and outer bag to prevent punctures. Nitrogen is filled between the layers. An iodized starch zone on the bag can detect leaks.

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Container design to prevent leaks and maintain tightness over long-term use, especially in temperature extremes. The container has a protective layer, like HDPE, on the inside walls and bottom to prevent leakage. But instead of the protective layer directly contacting the walls, there are sealing membranes between them. These membranes have a lower coefficient of thermal expansion than the protective layer, like polyester, to prevent distortion and separation when the protective layer expands/contracts with temperature changes. This ensures the seals remain tight over time. The container bottom may also have a thermal insulation layer covered by a membrane to prevent wetting and detachment.

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A vacuum detection device for packaging systems that allows comprehensive vacuum leak testing without immersion. It uses a vacuum-sealed indicator inside the package that shortens when vacuum sealed. If air leaks, the indicator extends due to pressure equalization. The device detects the indicator extension to determine if the package has leaks. It can be integrated into the packaging line after sealing and before discharge. This provides real-time leak detection without immersion.

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Self-supporting packaging bag that can prevent contents leakage when dropped compared to conventional bags. The bag has inner seals (bottom and side) that partially adhere the main body sections to the tape. This absorbs impact forces and prevents peeling of the overlapping seals that can cause leakage. The inner seals are close to the main seals (5 mm or less) to maintain internal volume. The bag can also have easy-opening sections above the inner seals.

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Corrosion-resistant chemical container bag with multiple layers to prevent seepage, leakage, and corrosion. The bag has a polypropylene body with inner waterproof, corrosion-resistant, anti-seepage, wear-resistant, and waterproof layers. A feeding structure and lifting rings enable handling. The layers include: 1) inner waterproof layer, 2) corrosion-resistant layer, 3) anti-seepage layer, 4) wear-resistant layer, 5) outer waterproof layer, and 6) sunscreen layer. The inner layers protect contents, outer layers prevent seepage, and the sunscreen layer blocks UV. A leakage observation structure with a circular groove and glass plate allows visual inspection. The lifting structure has a wear-resistant cloth, mesh cover, connecting belts, and hoisting rings.

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Metal packaging containers with warning and protection features to prevent leakage and provide timely leakage detection. The containers have a window installed in a groove on the outer wall. When the contents leak, it seals against the groove wall to prevent further leakage. This creates a visible warning of the leak. The window is supported at each end by protrusions. A sealing adhesive surrounds the window groove. The filling port has a sealing plug that fits like a trumpet shape into the port. This allows pressure equalization during filling/sealing. The window and groove are in a vertical strip on the outer wall.

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Leak-proof aluminum pesticide bottle with a recovery mechanism to prevent spillage and enable reuse if the main bottle leaks. The bottle has an inner medicine storage bottle, a leak-proof top component with a sponge, and a sealing assembly. When the inner bottle leaks, the sponge absorbs the spillage and compresses a rod to seal the top. This forces the spill back into the inner bottle through a hole.

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A packaging box for pesticides that allows easy detection of pesticide leakage to improve safety. The box has features like limiting holes, fixing holes, a plastic film, a cushion pad, and a fixing plate. The limiting holes in the box body and fixing plate allow pesticide to seep out when leaking occurs. The plastic film covers the limiting holes. If pesticide leaks, it will seep through the film and be visible through the limiting holes. The cushion pad prevents direct contact between the pesticide container and the box interior. This prevents further leakage. The fixing holes allow the fixing plate to secure the container in place. The box design enables early detection of pesticide leaks by making them visible.

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Container device with leak detection and cleaning features to prevent spills and facilitate maintenance. The device has an inner cylinder that can be detached and cleaned separately. A detection component between the inner and outer cylinders detects leakage through a hole in the inner cylinder bottom. An opening in the inner cylinder side allows easy bag removal. When the inner cylinder is cleaned, liquid flows through the hole into the detection component to also clean it.

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A mechanism to detect if packaged products have damaged or leaking bags without damaging the products themselves. The mechanism involves a rotatable sealed box connected to a door. Inside the box is a lifting mechanism with a push rod, balance bar, and top cover. The bottom plate and partition can be lifted out to place products. The box can be sealed, pressurized, and vacuumed to test for leaks. If the air pressure changes during testing, it indicates a damaged or leaking bag.

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Leak-proof container bag for transporting powders and granular materials that prevents leakage and damage to internal contents during transportation and handling. The bag has features like rubber strips around the outer surface, a leak-proof inner film, reinforced slings, and tightening rings on the bottom discharge port. These elements provide cushioning to prevent bag edges from tearing, seal against internal material leakage, and secure the discharge port. The bag also has a base layer with a wear-resistant spirally wound layer and an anti-corrosion layer for durability.

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A cardboard food packaging with a gas-tight and liquid-tight seal using a framed edge flange. The packaging has a cardboard container with foldable corner flaps, an edge flange protruding from the container, and a sealed lid. The edge flange has a framed cardboard component connected by adhesive along its entire length. The frame encompasses the container's protruding edge and seals to the lid. This framed edge provides a gas-tight and liquid-tight seal around the container opening.

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Leak-proof liquid packaging carton that prevents spills from inside the carton when transported. The carton has an anti-leakage assembly consisting of an anti-leakage film, a frame, and an anti-leakage cover. The frame has two groups of adjustable leak-proof racks at the ends. This allows the racks to be adjusted to fit tightly against the container being packaged, sealing against any protrusions or deformities. The adjustable racks ensure a snug fit to prevent leaks through gaps or wrinkles in the carton itself.

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Fully sealed anti-counterfeiting plastic packaging barrel that prevents leakage and provides tamper evidence. The barrel has a multi-layer sealing configuration with a sealing assembly between the barrel and the cover. This provides redundant sealing compared to traditional barrels with a single sealing ring. The barrel also has a detection discharge assembly on the bottom. The multiple sealing layers and bottom detection feature prevent leakage and enable tamper evidence.

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Plastic bag vacuum packaging machine with improved features for easier operation, better sealing, and detection of leaks. The machine has a bottom device, sealing device, and vacuum packaging device. The sealing device has a movable column that pushes to seal and retracts for opening. The vacuum device has a rotating threaded rod for lifting bags. The sealing detection device has a mechanism with a seal, T-shaped plate, and strip for sealing and positioning. This allows precise sealing, prevents air leaks, and facilitates installation.

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