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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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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Packaging bag with high durability and tightness for improved sealing and wear resistance. The bag has a body with internal modules like a portable module, connection module, and sealing component. An outer protection module prevents wear. The body has an observation window, inner sealing layer, and outer sealing component. This provides multiple layers of sealing, isolation, and tear protection. The inner sealing layer has an insulating and sealing layer and an anti-tear protection layer.

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A leak-proof container bottle design to prevent liquid seepage from the bottle mouth when the cap is removed. The bottle has a drainage sealing assembly that inserts into the bottle mouth. The drainage element guides liquid flow and has a sealing component on the upper edge to seal the gap between the drainage member and the bottle mouth. This prevents liquid from the bottle leaking out the gap between the cap and mouth during shaking. The drainage member has features like deflectors and backflow grooves to control liquid flow. The sealing assembly has a compressible gasket on the base body that the cap presses against. The drainage and sealing components are molded together.

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Anti-breakage bulk machine bag with leak detection, sealing, and alarm for preventing dust escape and equipment damage when bags rupture during transportation of powdery materials. The bag has a support with an external leak-proof mechanism that includes a sensor to detect gas leakage from the bag and a sealing component to quickly seal the leak. This allows timely detection of bag damage, sealing of leaks, and alarm to prevent further powder escape and staff injury.

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An aluminum foil bag with improved vacuum sealing and corrosion protection for preventing oxidation and moisture ingress into the bag. The bag has an aluminum foil body and a sealing mechanism that allows resealing after opening. The aluminum foil and PET layers provide high air and moisture tightness. The sealing mechanism uses hinged seals that clamp the bag mouth shut. A push/pull lever drives hooks to separate and open the seals. This allows resealing the bag after use to maintain vacuum and prevent corrosion.

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Sealing device for packaging bottles of imidazolinone herbicides that reduces leakage and spoilage during transportation. The device uses a specific capping process to improve sealing reliability. The bottle cap has layers of elastic sheet, gasket, and aluminum film. The capping machine line has a conveyor belt with sequential stations for capping, sealing, and re-capping. This allows tightening the cap, sealing the aluminum film, and then re-tightening the cap to prevent loosening during sealing. The double capping reduces leakage compared to just one cap.

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Moisture-proof and leak-proof composite container bag for flexible intermediate bulk containers (FIBC) with improved protection against moisture damage to the contents. The bag has a flexible main body with an inner lining, interlayer, and outer lining that are hot-pressed together. The inner lining is attached to the interlayer, the interlayer is attached to the outer lining. This composite construction provides enhanced moisture barrier compared to a single layer bag. The corners are heat-sealed for closure. The bag also has reinforcing ribs on the sides woven from PP threads.

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Online sealing leak test system for packaging containers like vials, bottles, and bags that enables continuous and automated inspection of sealing integrity during production. The system uses a conveyor with separate channels for incoming, qualified, and unqualified containers. Containers are conveyed through a sealing test device to check for leaks. Leaking containers are diverted to a separate channel. This allows continuous testing and sorting of containers without stopping the production line.

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Sealed barrel for chemical products that prevents volatilization during transportation. The barrel has a unique sealing mechanism that allows tight sealing and easy identification of leaks. The barrel has a rotating sealing device with a disc and triangular block that engage when the lid is closed. The lid has a spiral groove that mates with a similar groove on the barrel interior. This allows the lid to rotate and seal tightly against the barrel. An air pressure gauge in the lid lets you check for leaks. A vacuum exhaust hole allows evacuating the barrel for packaging. The barrel also has features like carrying straps, inner sealing shell, telescoping shafts, and spring-loaded blocks for shock absorption.

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Leak-proof container bag with an inner bag inserted inside the outer bag to prevent material leakage if the outer bag gets damaged during transportation. The inner bag has a separate feed and discharge pipe system. When filling the bag, the inner bag is placed inside the outer bag and sealed. Then the material is filled into the inner bag through the outer bag's feed pipe. This double-layer bag construction provides added strength to prevent outer bag damage and the inner bag protects against material leakage if the outer bag gets punctured.

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Reversible manufacturing process to create leak-resistant bags and containers without external fasteners or seals. The process involves molding an elastomeric or plastic container and a leak-resistant seal in a reversible way. The seal is attached to the outer surface of the container before inversion. After inversion, the seal closes the container without external clips or snaps. The seal has protrusions and gaps that engage during inversion. The seal also has a thicker section on the container walls to compress and seal during inversion. The reversible molding and seal design eliminates the need for additional sealing structures.

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Packaging structure for semi-solid food products like vegetable leaf fermented bean curd that addresses the issue of transportation damage and spoilage. The packaging uses a vacuum-sealed bag around an inner sealed container. The outer vacuum bag protects the product during transport while the inner container provides additional sealing and security. This prevents deformation, leaking, and spoilage compared to just using the inner container. The vacuum bag also prevents water seepage from the fermented bean curd. The volume of the vacuum bag is larger than the container to avoid waste and prevent breaking during transport. The vacuum bag can be sealed separately from the container for ease of use.

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Leak-proof organic solvent storage device with improved safety and sealing compared to conventional bottles. The device has an inner bottle nested inside an outer bottle, both sealed together with a cushion. The inner bottle holds the solvent covered by an incompatible sealing fluid. The inner bottle bottom connects to a buffer device and supply pipe. The outer bottle has an activated carbon layer, solvent sensor, and alarm system. This provides double sealing, absorption of leaks, and monitoring/alarm for safer storage of toxic, volatile solvents.

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Integrated heavy-packaging aluminum foil bag with high barrier and strong falling resistance that can be used for automatic packaging. The bag has a unique side seal design with an angled organ structure near the bottom that prevents product spillage when dropped. The side seal is made of a compound heat-seal membrane with a middle layer that allows gas to vent. This prevents bursting when filled with heavy products. The bag also has a check valve to prevent air ingress. The bag is integrally formed from aluminum foil layers in a layered dry compound structure.

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Beverage packaging bag with air tightness detection that provides improved sealing and leak prevention compared to existing bags. The bag has features like sealed edges, cushions, ports, and covers to prevent leaks and gas entry. The bag has a sealed base, sealed edges, a center packing bag, side cushions, a top cover, and an air tightness port. The sealed base and edges prevent squeezing. The cushions absorb pressure. The cover seals the top. The port lets air out. This configuration prevents leakage and detects air ingress.

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A leak-proof packaging carton that can securely contain liquids without spills or leaks. The carton has a movable top cover, a fixed sealing cover on the right side, and sealing strips on the top and bottom of the sealing cover. The carton body has waterproof strips at the corners and waterproof cushions on the inside walls. The sloped front of the sealing cover helps prevent liquids from flowing out. The sealing strips create a tight seal when the top cover is closed. This prevents leakage from the carton even when it is tilted or dropped.

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Vacuum leak detection system for packaging containers like food and pharmaceutical products to improve quality control. The system uses a vacuum pump and tank to create a constant vacuum pressure. A baffle valve allows the vacuum to be connected to the container lid during testing. If the container has a vacuum leak, air will enter and break the vacuum, indicating a faulty seal. The constant vacuum pressure reduces testing time compared to traditional methods that balance vacuum levels. The system can be integrated into packaging lines for automated leak detection.

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Air-tight packaging for chemicals that prevents accidental opening. The packaging has a container and lid that seal together to enclose the chemical. Additional mechanical fasteners secure the lid to the container beyond the sealing mechanism. These anti-misopening fasteners prevent the lid from accidentally coming off. A tool is provided specifically for removing the anti-misopening fasteners, different from the tool for removing the sealing fasteners. This ensures the chemical is not exposed to the environment when the packaging is opened properly.

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Leak-proof plastic container bag with improved sealing at the bottom to prevent material spills. The bag has a leak-proof layer at the bottom that wraps around the inside of the bag body and folds up to securely seal against the sides. A rubber sealing layer between the leak-proof layer and bag bottom further enhances the seal. This prevents leakage when filling the bag with powders or granular materials.

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An anti-counterfeiting and moisture-proof aluminum-plated packaging bag with improved security and sealing compared to conventional aluminum-plated bags. The bag has a multi-layer structure with an inner layer made of a moisture-proof material like EVOH, an aluminum layer sandwiched between two outer layers made of a sealable polymer like LDPE. The outer layers have overlapping seams with heat-sealable adhesive. This provides moisture barrier and seal integrity. The bag also has a security feature of a printed holographic stripe on the outer layer containing hidden images viewable only under certain angles. This adds anti-counterfeiting capability.

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A hermetically sealed food container with improved barrier properties and long-lasting sealing capability. The container has a cellulose base like cardboard, but also has an additional barrier layer made of a material like plastic or aluminum foil. The barrier layer is designed to seal around the folding areas of the cellulose base where folds can create channels for leakage. This prevents contaminants from entering the container. The barrier layer is adhered to the cellulose base using a sealant. The container can be made by forming the cellulose base in a flat shape and then folding it to create the container shape. The barrier layer is added after folding.

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Liquid cargo transportation bag with features to prevent leakage and minimize environmental impact in case of damage. The bag has a sealing liner inside which contains the cargo bag. The liner has a lower port connected to a leak-proof cuff. This allows any cargo leakage to be contained within the liner and cuff instead of escaping into the environment. The cargo bag has upper and lower valve ports for filling and draining. An additional air valve is provided. This allows the cargo bag to be pressurized to counteract any external pressure on the bag during transportation. If the cargo bag is damaged, the pressurized air will prevent further leakage through the holes. The liner and cuff containment system prevents any cargo spillage.

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A leak-proof aluminum foil storage bag for liquids that doesn't require sealing or adhesives. The bag is made of integrated aluminum foil layers for the top, bottom, and middle films. The foil edges are spliced together with overlaps and silicone adhesive. An aluminum strip is inserted in the overlap to provide support. The foil layers are connected at the bottom and sealed with adhesive. The top and bottom have zippers for self-sealing. An observation window with a transparent film allows viewing liquid levels. This integrated, sealed-edge bag eliminates gaps and collapsing for leak-free storage.

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A breakable membrane for sealing containers, like bottles, that provides tamper evidence and prevents leakage. The membrane has a V-shaped outer edge and a platform that allows access to the product inside the container. The membrane seals the container when intact but breaks when opened, providing visual evidence of tampering. The V-shape and small angle prevent leakage by providing a strong seal. The platform prevents obstruction of product access. The membrane can be co-injected with the cap closure for convenience.

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Oxygen indicator vacuum packaging bag for feed that is resistant to puncturing and easy to check for leaks. The bag has an inner bag inside an outer bag with an oxygen indicator between them. The inner bag has an outer buffer layer to prevent particles from puncturing the outer bag. The outer bag can be torn open to easily see if the inner bag has leaked. This allows checking for spoilage and damage without inflating the bag. The clampable outer bag ends let stacking multiple bags without compression.

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Packaging bag with a spout that has a spout member with excellent gas barrier properties and is easy to manufacture. The spout has a separate base and cylindrical dispensing portion that inserts into a through hole in the base. Movement restricting mechanisms prevent relative movement between the base and dispensing portion to securely lock the spout in place. This prevents leakage while still allowing easy assembly. The dispensing portion has lower gas barrier properties than the base, and the dispensing portion protrudes from the base with locks on its outer surface. The base has locks on its inner surface that engage the protruding dispensing portion.

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Integrated liquid packaging system that can detect and recover leaks from packaged bags. The system has a leak detection section with an infrared spectrometer to test bags for leaks without damaging them. If a leak is found, a positioning pusher moves the bag into a recovery section where it's cut open to recover the leaked liquid. This allows automated, safe leak detection and recovery compared to discarding leaking bags.

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Vacuum packaging machine with leak detection to prevent spoilage of packaged products. The machine has a vacuum pump, sealer, roller bed, and detection device. Packaging products are placed on the roller bed and sealed by the sealer. The vacuum pump removes air from the bags. The detection device has sensors to monitor air pressure inside the sealed bags. If leakage is detected, an alarm sounds to alert the user. The detection prevents spoilage by allowing identification of leaky packages before storage.

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Inspecting the seal of flexible containers for fluids, like single-use bags for biopharmaceuticals, to reduce the risk of leaks and contamination. The inspection method involves connecting the container to a pressurized gas source and checking for leakage. This allows detecting smaller leaks that may not be found in conventional two-stage inspection methods. The container has an opening that can be sealed in a gas-tight manner to connect it to the pressurized gas source.

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A container liquid transport bag with improved sealing performance for transporting leaky liquids like oils. The bag has multiple layers of films welded together at edges and sides to provide better sealing and strength compared to stitched bags. The layers are welded using techniques like heat marking, linear or curved patterns, and disc shapes. This provides sealing at bag ends, valve seals, and along sides to prevent leaks. The multi-layer, welded construction improves seal strength and prevents leakage of liquids like oils that are prone to leaking.

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Primary pharmaceutical packaging that improves barrier properties, reduces leaching, and provides better sealing for long-term storage of injectable drugs. The packaging has a collapsible container made of a cycloolefin polymer film in contact with the drug. It also has a rigid closure element with a tapered tube sealing lip. The container can be partially collapsible for filling. The container and closure are both made of cycloolefin polymers to minimize permeation and leaching. The collapsible container reduces packaging size and weight. The tapered tube sealing lip prevents container pressure leakage.

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Liquid packaging container with improved sealing and assembly features for large capacity bottles. The container has a removable outer cover, an inner plug, and a sealing position between them. The cover has a convex abutment against the inner plug. This prevents leakage when the cover is locked onto the container. The inner plug has an inner ring inserted into the bottle mouth and an outer ring connecting to the container. The cover presses against the inner ring to seal. The outer ring engages protrusions on the container to prevent movement. This secure assembly with sealing ensures reliable closure for large bottles.

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