Electro-mechanical paper sheet material dispenser with tail sensor
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Solution Overview
Problem
Existing paper towel dispensers often experience 'tabbing' issues, where the paper tears instead of being pulled through the mechanism, especially with low basis weight paper and high water absorbency rates, leading to user frustration and inefficiency.
Innovation Solution
A multi-function paper towel dispenser with an electric motor and sensor system that automatically rotates the toweling support roller and cuts the paper, using infrared sensors to detect the presence of a tail and energize the motor to produce a new tail if needed, reducing the user's pull force and preventing tabbing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a purely mechanical dispenser relies on direct user pulling to transport toweling and actuate cutter blades, then the device complexity is low, but tabbing occurs frequently especially with low basis weight paper
Solution Approach 1:
The patent replaces the purely mechanical pulling and cutting mechanism with an electro-mechanical system. A sensor detects when the toweling tail is pulled, triggering an electric motor to transport the toweling and actuate the cutter blades. This substitution eliminates the tabbing problem by removing direct user contact with the paper during the dispensing process, while accepting increased device complexity through the addition of sensors, motors, and control circuitry.
2Reliability
If electro-mechanical dispensers are used to transport toweling and actuate cutter mechanisms, then tabbing is prevented, but the device complexity increases
Solution Approach 1:
The electro-mechanical dispenser operates autonomously by detecting user intent through the sensor and automatically executing the dispensing sequence. When the sensor detects the toweling tail being pulled, the system self-activates the motor to transport the paper and trigger the cutter without requiring direct manual intervention, thereby preventing tabbing while managing complexity through automation.
Solution Approach 2:
The system incorporates a sensor that provides feedback about the toweling tail position and user interaction. This feedback mechanism allows the control circuitry to determine when activation is needed, creating a closed-loop system that responds to user actions while preventing the tabbing issue through automated control of the dispensing process.
3Quantity of substance
If low basis weight paper with high water absorbency is used, then the paper is more absorbent, but tabbing occurs more frequently
Solution Approach 1:
The electro-mechanical system replaces manual pulling with automated motor-driven transport, eliminating the mechanical stress that causes tabbing in highly absorbent, low basis weight papers. The sensor-triggered motor system gently advances the paper through the dispenser and uses controlled blade actuation to cut the sheet, preventing the tearing that occurs when users directly pull on these delicate papers.
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 system significantly reduces tabbing occurrences by ensuring a consistent and easy dispensing process, even with low basis weight papers, by automatically producing a new tail when needed and assisting the user with minimal manual effort.
Implementation Method 1
sensor structure, such as an infrared sensor, for sensing whether a replacement tail portion of the roll of toweling projects through and beyond said opening
Data Source
AI summary
A paper sheet material dispenser apparatus for dispensing paper sheet material from a roll of paper sheet material having a tail portion includes a sensor structure having a light emitter and a light sensor for sensing the absence of a replacement tail portion projecting from a housing exit opening and for activating an electric motor to rotate a roll support drum and cause the replacement tail portion to project from the exit opening.