Dispenser with automatic stub roll drop down
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Solution Overview
Problem
Tissue dispensers often leave stub rolls unused, wasting remaining tissue and requiring manual intervention to replace them, especially in scenarios where maintenance is infrequent or restricted.
Innovation Solution
A dispensing system with a sensor and piston mechanism that automatically detects the roll's size and disengages when it reaches a threshold, allowing the stub roll to drop and make space for a fresh roll, while continuing to dispense from the stub roll until exhausted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual replacement of stub rolls is required, then maintenance personnel can control when replacement occurs, but maintenance frequency must be increased and manual intervention is needed
Solution Approach 1:
The dispenser automatically detects when a stub roll is present and triggers a visual indicator to notify maintenance personnel, eliminating the need for manual checking and enabling automatic self-monitoring of replacement needs
Solution Approach 2:
The system provides visual feedback through an indicator that activates when a stub roll is detected, creating a closed-loop communication system that informs maintenance personnel when intervention is needed without requiring continuous manual inspection
2Reliability
If stub rolls are removed early to make space for fresh rolls, then fresh tissue is always available, but remaining tissue on stub rolls is wasted
Solution Approach 1:
The system prepares for future replacement by automatically detecting the presence of a stub roll and activating a visual indicator in advance, allowing maintenance personnel to plan replacement timing optimally without rushing removal or risking exhaustion
Solution Approach 2:
The visual indicator provides timely feedback about stub roll presence, enabling maintenance personnel to make informed decisions about optimal replacement timing that balances fresh tissue availability with maximizing use of remaining stub roll tissue
3Loss of substance
If multiple stub rolls are present in the dispenser, then remaining tissue can be fully utilized, but space for fresh rolls is blocked
Solution Approach 1:
The visual indicator system provides continuous feedback about the number and status of rolls in the dispenser, enabling maintenance personnel to monitor when stub rolls are present and plan timely replacements to maintain optimal capacity for fresh rolls
Solution Approach 2:
The system dynamically adapts its behavior based on roll conditions - the visual indicator activates and deactivates based on the presence or absence of stub rolls, providing real-time information that enables flexible maintenance scheduling
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 the remaining tissue on stub rolls is fully utilized, simplifies the replacement process by automatically making space for new rolls, and provides visual status indicators for maintenance personnel.
Implementation Method 1
The sensor can move as the roll decreases in size (e.g., the outside diameter decreases) and can apply a force to the roll
Implementation Method 2
Due to an operational connection of the sensor and piston, the movement of the sensor can cause the piston to move too
Implementation Method 3
This results in the roll (now a stub roll) automatically dropping, such as at least partly by force of gravity, from a main position to a secondary position
Data Source
AI summary
Various dispensing systems with drop-down features are disclosed. In certain embodiments, the dispensing system includes a roll support with a sensor and a piston. The sensor can move as the roll decreases in size (e.g., the outside diameter decreases) and can apply a force to the roll. The piston can move to become less engaged with the roll, such as becoming less received in a roll plug or the hollow core of the roll. When the roll has decreased to a threshold size, the piston substantially or fully disengages from the roll and/or the sensor applies a force to dislodge the roll from the roll support. This results in the roll automatically dropping off the roll support. The roll support is thus available to receive a fresh roll.