Bag Bottom Cover Sheet Segmentation for Tool-Free Opening
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Solution Overview
Problem
Conventional bags for loose materials require tools like knives for opening, which can lead to injuries when tools are not available, due to their high strength and resistance to moisture.
Innovation Solution
A bag design featuring a tubular material with a detachable second cover sheet that allows for opening without tools, where the second cover sheet is welded or glued to the bag bottom to ensure it can be easily removed, while the first cover sheet remains intact for reinforcement, enabling the bag to be opened by detaching the second cover sheet and allowing gravity to separate the sections for material discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the bag fabric is made with high strength and moisture resistance, then the bag can withstand high loads and prevent leakage, but the bag becomes difficult to open without tools
Solution Approach 1:
The bag bottom is divided into multiple regions with different cover sheets: a first cover sheet that remains attached for reinforcement and a second cover sheet that is detachably connected for easy opening. This segmentation allows the bag to maintain strength where needed while providing easy access where required.
Solution Approach 2:
The second cover sheet is extracted as a separate, detachable component from the bag bottom structure. It can be easily removed to create an opening for dispensing material, while the first cover sheet remains in place to maintain the structural integrity and sealing function of the bag bottom.
2Reliability
If the bag bottom is sealed with strong adhesive or welding, then the bag prevents leakage, but the bag cannot be opened easily
Solution Approach 1:
The sealing system is segmented into two functional parts: the first cover sheet with strong adhesive/welding for leakage prevention, and the second cover sheet with weaker attachment for easy removal. This allows the bag to be both sealed reliably and opened easily.
Solution Approach 2:
Different attachment strengths are applied locally to different regions of the bag bottom. The first cover sheet uses strong attachment (adhesive or welding) in areas requiring leak prevention, while the second cover sheet uses weaker attachment in areas requiring easy access for material dispensing.
3Ease of manufacture
If a valve patch is used to seal the bag bottom, then the bag can be sealed automatically during filling, but the bag still requires tools to open
Solution Approach 1:
The valve patch system is combined with the segmented cover sheet design. The valve patch provides automatic sealing during filling, while the detachable second cover sheet provides easy opening for dispensing. This combination maintains both automatic sealing functionality and ease of operation.
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
Enables easy opening and discharge of materials without tools, preventing injuries and allowing for adjustable opening sizes based on material type, while maintaining bag stability and preventing leakage.
Implementation Method 1
the connection between the second cover sheet and the bag bottom is obtained by welding or gluing the second cover sheet to the tubular material of the bag bottom
Implementation Method 2
the connection between the second cover sheet and the bag bottom is obtained by welding or gluing the second cover sheet to the tubular material of the bag bottom
Implementation Method 3
it suffices to rotate the bag such that the loose material will press against the sections as a result of gravity and the adhesion between the sections will be broken by the loose material before loose material pours out of the bag
Data Source
AI summary
A bag for loose material, wherein the bag is formed from a tubular material, which tubular material is a tubular planar assembly or a flat material connected to form a tube, and has a first and a second open end. Sections of the tubular material of one of the ends are shaped by folding to form a bag bottom. The bag bottom exhibits a first cover sheet and a second cover sheet. The first cover sheet is connected to the bag bottom and extends in a first region of the bag bottom. The second cover sheet is connected to the bag bottom and extends in a second region of the bag bottom. Via the cover sheets, the folded sections of the tubular material are held together in such a way that the bag bottom is sealed.