Recycled Resin Authentication Using Inflow-Outflow Traceability

The patent introduces a computer system as an intermediary that manages authentication between multiple manufacturing entities. This system stores and verifies information about inflow and outflow amounts of recycled resin, acting as a neutral mediator that ensures authenticity without requiring direct trust relationships between all parties in the supply chain.

The patent implements feedback mechanisms where the computer system continuously monitors and compares inflow amounts (receiving amount) with outflow amounts (sending amount) of recycled resin. Authentication is granted only when the outflow amount does not exceed the inflow amount, creating a closed-loop verification system that ensures traceability and prevents fraud.

The patent performs preliminary actions by having manufacturing entities report their inflow and outflow amounts to the computer system in advance. The system pre-stores this information and pre-establishes authentication conditions, so that when authentication is needed, the verification can be performed quickly by simply checking against pre-stored data rather than calculating from scratch.

The patent changes the authentication approach from verifying individual transactions to verifying cumulative parameters (total inflow amount vs. total outflow amount). By working with aggregated parameters rather than individual transaction details, the system reduces authentication complexity while maintaining reliability through the use of recycling ratios and cumulative balance checks.