Web Material Dispenser Roll Authentication by Frequency Shift
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Solution Overview
Problem
Conventional automatic web material dispensers often result in waste due to inconsistent dispensing based on web material characteristics, and existing smart dispensers with RFID or bar code technologies are costly, complex, and can be circumvented by transferring authentication tags to unauthorized rolls.
Innovation Solution
An automatic web material dispenser that uses a frequency-changing device or material on the roll to authenticate authorized products, generating a unique frequency that matches a predetermined range to enable dispensing, while preventing unauthorized use by locking out unapproved rolls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RFID or bar code authentication systems are used to prevent unauthorized rolls, then security against unauthorized use is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent extracts the authentication function from complex RFID or bar code systems and implements it using a simple frequency-changing device attached to the roll core. This device interacts with the dispenser's oscillator to produce a frequency shift, providing authentication through a minimalistic approach that avoids the complexity of electronic identification systems.
Solution Approach 2:
The frequency-changing device is implemented as a simple, inexpensive component that can be attached to or integrated into the roll core. This disposable or single-use authentication element eliminates the need for expensive, reusable RFID tags or bar code readers, significantly reducing both device complexity and cost while maintaining security.
2Device complexity
If fixed feed length settings are used in conventional dispensers, then device complexity is reduced, but manufacturing precision of dispensing amount deteriorates
Solution Approach 1:
The patent transitions from fixed, static feed length settings to dynamic, adjustable feed length control. The system automatically modifies dispensing parameters based on detected web material characteristics such as basis weight and absorbency, allowing the dispenser to adapt in real-time to different material types while maintaining simple overall device architecture.
Solution Approach 2:
The system changes operational parameters (feed length, dispensing speed) based on detected properties of the web material. By measuring characteristics like basis weight and adjusting the feed length accordingly, the system achieves precise dispensing control without requiring complex mechanical adjustment mechanisms, simply by varying the electrical control parameters.
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 reduces waste by tailoring dispensing settings to the specific web material characteristics and prevents unauthorized use without the need for costly RFID or bar code systems, ensuring efficient and secure operation.
Implementation Method 1
uses a frequency-changing device or material on the roll to authenticate authorized products, generating a unique frequency that matches a predetermined range
Data Source
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 contains a feature that alters an electromagnetic field created proximate the core. The alteration of the electromagnetic field may then be used to determine if the core, and thus the roll, is usable with the dispenser. The feature is designed such that it is damaged once product is completely dispensed from the roll thereby preventing replenishment and reuse of a spent roll.