Material dispenser with material level indicator
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Solution Overview
Problem
Existing paper towel dispensers lack an effective material level indicator that accurately signals when the roll is depleted, leading to unnecessary downtime as users are unaware of the remaining paper web, and existing solutions suffer from jamming issues due to insufficient roll support.
Innovation Solution
A material dispenser with a housing, a mounting for a roll, and a material level indicator featuring a rotatable arm with a visual indicator member and a lateral abutment that moves between positions as the roll depletes, providing a visual indication of the paper web's status through a resiliently biased mechanism, preventing jamming and ensuring accurate depletion detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a material level indicator is added to the dispenser, then the ability to detect material depletion is improved, but the device complexity increases
Solution Approach 1:
The indicator arm utilizes the roll's own weight and position to trigger the indication mechanism. As the roll depletes and drops, its weight directly actuates the arm to move between positions, eliminating the need for external sensors or power sources.
Solution Approach 2:
The indicator arm serves as a mechanical intermediary between the roll's position and the visual indicator. It translates the physical state of the roll (full or depleted) into a visible signal through its movement between two distinct positions.
2Measurement precision
If the roll is placed on a support drum as in US 3896691, then material level detection is enabled, but the roll support becomes insufficient leading to jamming
Solution Approach 1:
The support structure is divided into two separate support members instead of a single drum. This segmentation provides distributed support across the roll, preventing the jamming issues associated with insufficient support while maintaining the material level detection capability.
Solution Approach 2:
Instead of using a drum to support the roll from below, the invention uses support members that engage the roll from the sides, allowing the roll to rest on them. This inverted support approach provides better stability and prevents jamming while still enabling the roll to drop when depleted.
3Illumination intensity
If the visual indicator member is positioned far from the roll, then the indication is more visible, but the arm length and device complexity increase
Solution Approach 1:
The visual indicator member is positioned in a different spatial dimension relative to the roll, allowing it to be laterally displaced without requiring excessive arm length. The indicator can be viewed through an aperture in the housing, providing visibility without increasing mechanical complexity.
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 solution provides a reliable and compact mechanism for indicating the paper web's status, preventing unnecessary downtime by signaling when the roll needs replacement, while minimizing the risk of jamming and ensuring accurate depletion detection.
Implementation Method 1
The material level indicator may comprise a resilient element which biases the arm into the first position
Data Source
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AI summary
A material dispenser comprising a housing, a mounting for a roll of material to be dispensed, and a material level indicator, in which said mounting comprises a first support member for rotationally supporting a first side of a roll of material to be dispensed in a plane, in which said material level indicator comprises an arm rotationally mounted to said dispenser at a pivot point, said arm comprising a visual indicator member at a first end thereof and a lateral abutment axially displaced from said visual indicator member for engaging with said first side of said roll of material, in which said arm is rotatable about said pivot point between a first position in which said arm is substantially parallel with said plane and said lateral abutment traverses said plane, and a second position in which said arm is arranged at an angle to said plane, and said lateral abutment and said visual indicator member are laterally displaced.