Heat-Activated Lid Mechanism for Hermetic Medical Waste Container
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Solution Overview
Problem
Current containers for biomedical waste cannot be opened for pressurized steam sterilization without external robotic or human intervention, risking hazardous spills and failing to effectively sterilize contents due to lack of steam penetration, and existing double-layered bags do not compress waste or prevent liquid/solid leakage.
Innovation Solution
A hermetically sealed metal container with a double-layered plastic bag and a heat-activated mechanism that uses metal rods and a spring to open the lid only when exposed to high temperatures, allowing steam sterilization while preventing accidental opening and maintaining container cleanliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the container is hermetically sealed for transportation, then the waste is contained securely, but steam cannot penetrate to sterilize the contents effectively
Solution Approach 1:
The container is hermetically sealed in advance for secure transportation, but the lid is designed with a heat-activated opening mechanism that automatically opens when exposed to autoclave temperatures, allowing steam penetration for effective sterilization without requiring manual intervention
2Ease of operation
If the lid is opened manually or by robot before sterilization, then the container can be accessed, but hazardous waste may spill into the environment
Solution Approach 1:
The lid opening mechanism is self-activating through a heat-sensitive component that automatically triggers lid opening when the container is placed in the autoclave and exposed to sterilization temperatures, eliminating the need for manual or robotic intervention and preventing hazardous spills
Solution Approach 2:
The lid opening mechanism utilizes temperature parameter change as the trigger condition - the heat-sensitive component expands or changes state at autoclave temperatures, automatically initiating the lid opening sequence only under the specific thermal conditions of sterilization
3Reliability
If double-layered bags are used for waste containment, then leakage is prevented, but waste compression is not achieved
Solution Approach 1:
The bag system uses composite construction with an inner bag made of heat-shrinkable material and an outer bag made of different material properties, where the inner bag provides compression through heat shrinkage while the outer bag maintains structural integrity and prevents leakage
4Manufacturing precision
If heat sealing is used on double-layered bags with different materials, then sealing is achieved, but production time increases due to prolonged heat contact requirement
Solution Approach 1:
The sealing process merges the sealing of both bag layers into a single simultaneous operation using a dual-heating plate system, where both the inner and outer bags are sealed at the same time through coordinated heating elements, reducing total sealing time while maintaining quality
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures effective sterilization of medical waste by allowing steam penetration and preventing spills, with a production machine that prolongs heat contact for improved sealing without reducing production speed.
Implementation Method 1
a heat-sealing machine on a conveyor belt... seal the bag by means of heat contact
Implementation Method 2
the inner sub-bag being made of LDPE heat-shrink material
Implementation Method 3
sterilized by pressurized steam in an autoclave
Data Source
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AI summary
The invention relates to a system for containing medical waste with a bag and a machine for producing said bag. It relates to a reusable, hermetically sealed, metal container for medical waste, with a bag and locks or latches, which prevent the lid from being opened until the waste inside the same has been sterilized by the pressurized steam of an autoclave. It also relates to said plastic bag made up of two or more layers of different physical properties, configured into a single body. Said bag is housed inside the aforementioned hermetically sealed container. It also relates to a machine for producing these bags with a winder, folder and several sealers using heat resistance inserted into conveyer belts.