Adjustable-Height Tissue Dispenser to Reduce Fall-Back Failures
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Solution Overview
Problem
Conventional sheet material dispensers face issues with reliability due to 'fall-back' of partially dispensed sheets as the dispenser height increases and stack height decreases, often requiring inconvenient manipulation or additional openings that can be unsanitary.
Innovation Solution
A dispenser with a movable bottom panel defined by lines of weakness, allowing users to adjust the position of the sheet material by separating and repositioning the bottom and side panels, reducing the internal volume and minimizing 'fall-back' by moving the sheets closer to the dispensing opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the dispenser height increases to accommodate more sheets, then the sheet capacity increases, but the reliability of pop-up dispensing deteriorates due to fall-back
Solution Approach 1:
The dispenser allows dynamic adjustment of its height by enabling the bottom portion to be separated from the top portion along break lines. As sheets are depleted, the user can collapse the dispenser by breaking the bottom portion away, reducing the internal volume and maintaining reliable pop-up dispensing by keeping the sheet stack height appropriate for the dispenser geometry.
2Reliability
If the bottom portion is made movable to adjust dispenser height, then the reliability of dispensing improves, but the device complexity increases
Solution Approach 1:
The dispenser is segmented into a top portion and a bottom portion that can be separated along predetermined break lines. This segmentation allows the bottom portion to be easily broken away and discarded, simplifying the adjustment mechanism while maintaining reliable dispensing by reducing the dispenser height as sheets are depleted.
Solution Approach 2:
The bottom portion of the dispenser is designed as a disposable component that can be broken away and discarded after use. This eliminates the need for complex mechanical adjustment mechanisms, reducing device complexity while allowing the dispenser height to be reduced as sheets are depleted, thereby maintaining reliable pop-up dispensing.
3Ease of operation
If additional openings are added to the dispenser for sheet removal, then the ease of operation improves, but the hygiene deteriorates due to debris accumulation
Solution Approach 1:
Instead of adding additional openings to the dispenser body, the invention extracts the problematic bottom portion entirely by allowing it to be broken away and discarded. This eliminates the need for additional openings while maintaining ease of operation, as users can still access sheets through the original dispensing opening, and prevents debris accumulation by removing the enclosed cavity that would otherwise trap dirt and lint.
Data Source
AI summary
The present invention provides a dispenser for storing and dispensing a stack of sheet material, such as a stack of folded tissue sheets and more particularly a folded stack of facial tissue sheets. The height of the dispenser, particularly the dispensing height of the dispenser, may be adjusted by the user once a portion of the sheets have been dispensed to alleviate one or more problems often associated with dispensing, such as the incidence of dispensing failures due to fall-back. The dispenser includes a bottom panel that is movable from a first position to a second position where the second position places a portion of the bottom panel closer to a dispensing opening disposed opposite the bottom panel.