Dunnage Bag Inflation Stripes for Safe Cargo Gap Sizing
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Solution Overview
Problem
Users face difficulties in selecting the appropriate size of dunnage bags for cargo gaps, leading to reduced contact between the bag and cargo, which can compromise the bag's ability to stabilize and restrain cargo, especially when using inflatable air bags with limited visual indicators that are expensive and language-dependent.
Innovation Solution
Dunnage bags with graduated inflation stripes that provide visual cues indicating the bag's width and gap width, using stripes of varying widths and colors to signal safe and unsafe inflation limits, allowing users to determine the appropriate bag size and gap width without language barriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a single marking line is used to indicate acceptable inflation range, then the manufacturing cost is reduced, but the information provided to users is limited and not clearly conveyable across language barriers
Solution Approach 1:
The single marking line is segmented into multiple graduated stripes of varying widths. Each stripe represents a different inflation level or gap width category, allowing users to obtain detailed information about bag expansion and gap coverage without requiring complex language-based indicators.
Solution Approach 2:
Different stripes are assigned different colors or patterns to indicate various inflation levels or gap width ranges. This visual coding system provides intuitive, language-independent information about whether the bag is properly inflated and whether the gap size is appropriate, eliminating the need for text-based instructions.
2Ease of operation
If users select an incorrect bag size for the gap, then the bag cannot be properly selected, but this leads to reduced contact between bag and cargo
Solution Approach 1:
The graduated stripes are pre-marked on the bag to indicate different gap width ranges and appropriate bag sizes. Users can visually assess the gap size and select the correct bag before insertion, ensuring proper fit and contact with cargo from the outset, thereby maintaining reliable stabilization.
Solution Approach 2:
The complex decision-making process for bag selection is replaced by a simple visual indication system. Instead of requiring users to measure, calculate, and determine appropriate bag sizes through text-based guides, the graduated stripes provide immediate visual feedback about gap width and suitable bag selection, making the process intuitive and error-free.
3Area of stationary object
If the gap between cargo is too large for the bag, then contact between bag and cargo is reduced, but this compromises the ability to restrain or stabilize cargo
Solution Approach 1:
The graduated stripes provide real-time visual feedback about the relationship between bag size and gap width. Users can observe which stripes are visible or obscured to determine whether the bag is appropriately sized for the gap, ensuring sufficient contact area and reliable cargo restraint before inflation occurs.
Data Source
AI summary
A dunnage bag may have stripes on its sides that extend from a top edge to a bottom edge of the bag. When the bag is inflated, one or more of the stripes may be visible to a user viewing an end of the bag. A number and width of stripes visible to a user may indicate a width of the dunnage bag, a corresponding width of the gap within which the bag is positioned, and an amount the bag that is in contact with surfaces of adjacent cargo. The user may note an outermost visible and determine that the bag has a width within a range of widths associated with such outermost visible stripe, and whether such width allows for the bag to be used safely. If a stop stripe is visible, the gap is too wide for the bag.