Elastic Drawstring Trash Bag Inner Seal Design
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Solution Overview
Problem
Existing drawstring trash bags struggle to securely fit over trash receptacles with larger rims due to fixed opening widths and non-elastic drawstrings, which can lead to the drawstrings dislodging when stretched.
Innovation Solution
The improved drawstring trash bag features an elastic drawstring with inner seals that reduce the upper opening width, allowing it to stretch over receptacles and contract for a snug fit, utilizing elastomers in the drawstring composition for controlled stretching properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the opening width of the trash bag is reduced to fit tightly over the trash receptacle, then the fit security is improved, but the bag cannot be stretched over receptacles with larger rims
Solution Approach 1:
The drawstring is made elastic so that its length can dynamically adjust. When the bag is placed over the receptacle, the elastic drawstring stretches to accommodate larger rims, then contracts to provide a tight fit, resolving the contradiction between fixed opening width and adaptability to different sizes
Solution Approach 2:
The elastic properties of the drawstring allow the opening width parameter to change. The drawstring can be stretched to increase the opening width for placement over the receptacle rim, then contracts to reduce the opening width for a secure fit, enabling both tight fitting and adaptability
2Adaptability or versatility
If the drawstring is stretched to fit over larger receptacle rims, then the adaptability is improved, but the drawstring may dislodge from the seals
Solution Approach 1:
Inner seals are positioned inward from the outer seals to create a redundant sealing system. When the elastic drawstring stretches over large receptacles, the inner seals provide additional anchoring points that prevent dislodgement, cushioning against the potential failure of the outer seals alone
Solution Approach 2:
Different regions of the seal system have different functions: outer seals provide the primary sealing interface, while inner seals positioned inward provide additional retention and anchoring. This local differentiation of seal functions ensures both adaptability and reliability
3Reliability
If inner seals are added to reduce the upper opening width, then the fit tightness is improved, but the device complexity increases
Solution Approach 1:
The inner and outer seals are integrated into a single hem structure, combining multiple sealing functions into one unified component. This merging approach provides tight fit through dual seals while minimizing the increase in device complexity by using a integrated design rather than separate attached components
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
The elastic drawstring trash bag provides a secure, snug fit around trash receptacles, ensuring the contents remain contained and the bag can be easily carried, offering improved convenience and functionality compared to prior art designs.
Implementation Method 1
Certain embodiments of the present invention include elastomers in the composition of the drawstring providing both the ability for the drawstring to stretch, but more importantly to allow the drawstring contract after it expands.
Data Source
AI summary
The present invention relates to polymeric bags, particularly polymeric drawstring trash bags. The present invention comprises a trash bag having an elastic drawstring. The elastic drawstring trash bag features a short seal and an inner seal at each upper corner of the drawstring trash bag. The short seal and inner seal are separated by a small unsealed area. The inner seal serves to reduce the upper opening of the drawstring trash bag, while the elastic drawstring utilized with the bag provides a bag that allows the bag to fit snugly on many common trash receptacles.