Dispenser having a plug and a bobbin
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Solution Overview
Problem
Conventional automatic dispensers face issues with waste due to inconsistent dispensing of web materials, as they do not adapt to the characteristics of the material, and existing smart dispensers with RFID or bar code technologies are costly, complex, and can be circumvented by removing identification tags.
Innovation Solution
An automatic web material dispenser that determines if the roll is approved by comparing a baseline electromagnetic field frequency to the frequency after loading, using a plug with a metallic feature to discourage removal and ensure proper authorization, and adjusts dispensing settings based on the material's characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RFID smart chips or bar code readers are used to determine roll authorization, then the lockout feature can prevent unauthorized rolls, but the cost and complexity of the dispenser significantly increase
Solution Approach 1:
The patent extracts the identification function from complex electronic systems (RFID readers, bar code scanners, microcontrollers) and implements it through a simple passive metallic tag that interacts with the existing electromagnetic field of the drive roller motor. This eliminates the need for separate readers and complex processing circuitry while maintaining authorization verification capability.
Solution Approach 2:
The metallic tag embedded in the roll core serves itself as the identification medium without requiring active components, power sources, or complex communication protocols. The tag passively interacts with the electromagnetic field generated by the motor, allowing the motor itself to function as both the actuator and the reader, thereby simplifying the overall system.
2Reliability
If RFID smart chips or bar code readers are used to determine roll authorization, then the lockout feature can prevent unauthorized rolls, but the overall cost of the dispenser significantly increases
Solution Approach 1:
The patent employs an inexpensive metallic tag embedded in the roll core that can be easily manufactured and integrated during the roll production process. This disposable tag replaces expensive electronic identification components, making the authorization system cost-effective while maintaining its lockout functionality.
3Device complexity
If the web material dispenser uses conventional fixed dispensing settings, then the dispenser structure is simple, but waste increases due to inconsistent dispensing regardless of material characteristics
Solution Approach 1:
The patent incorporates a sensor system that detects the presence and characteristics of the web material roll, providing feedback to the control system. This feedback enables the dispenser to adjust dispensing parameters such as feed length and speed based on the actual roll characteristics, optimizing material usage and reducing waste while maintaining a relatively simple overall structure.
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
This solution effectively prevents unauthorized use and optimizes dispensing by ensuring only approved rolls are used, reducing waste and operational costs while maintaining the advantages of smart dispensers.
Implementation Method 1
determines if the roll is approved for use with the dispenser by comparing a baseline electromagnetic field frequency to the frequency after the roll has been loaded into the dispenser
Data Source
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AI summary
An automatic product dispenser determines if the roll loaded into the dispenser is approved for use with the dispenser. The core of a roll receives a plug that engages a hub within the dispenser. The plug has a feature that alters an electromagnetic field created proximate the hub. The alteration of the electromagnetic field may then be used to determine if the plug, and thus the roll, is usable with the dispenser.