Dual Authorization Codes for Printing Consumables
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Solution Overview
Problem
Unauthorized consumable items, such as refilled or remanufactured toner cartridges, can be used in printing devices, leading to degraded print quality and potential device damage, as these items often lack or have mismatched authorization codes.
Innovation Solution
Incorporating both an optically scannable and an electrically readable authorization code on consumable items for printing devices, ensuring that both codes must match for the item to be authorized for use, thereby preventing unauthorized reuse or refilling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single authorization code is used on consumable items, then the authorization process is simple, but unauthorized consumable items can still be used by removing or replacing the code
Solution Approach 1:
The authorization code is divided into two separate codes: an optically scannable code and an electrically readable code. Each code is stored in a different location on the consumable item, making it difficult for unauthorized parties to remove or replace both codes simultaneously. The printing device requires both codes to match for authorization, thereby improving security without requiring a single complex code system.
Solution Approach 2:
The patent introduces an intermediary verification process where the printing device compares the optically scannable code with the electrically readable code. This intermediary comparison step ensures that both codes must match for the consumable item to be authorized, adding a layer of verification that prevents unauthorized use while maintaining system manageability.
2Ease of operation
If only an optically scannable authorization code is used, then the consumable item is easy to authorize, but the code can be easily removed or replaced
Solution Approach 1:
The authorization system is segmented into two independent codes with different access methods. The optically scannable code remains easy to read and process, while the electrically readable code provides an additional security layer that is more difficult to remove or replace. Both codes must be present and matching for authorization to occur.
Solution Approach 2:
The patent adds another dimension to the authorization code system by introducing a second code that can be read electrically rather than optically. This dimensional addition to the authorization mechanism increases security without complicating the basic authorization process, as the printing device simply needs to read both codes and compare them.
3Reliability
If both optically scannable and electrically readable authorization codes are required, then unauthorized consumable items are prevented from being used, but the authorization verification process becomes more complex
Solution Approach 1:
The verification process is segmented into distinct steps: first reading the optically scannable code, then reading the electrically readable code, and finally comparing the two codes for a match. This segmentation of the verification process makes the complexity manageable and ensures that both security measures are applied without requiring a single overly complex verification system.
Solution Approach 2:
The system uses a copy-comparison approach where the optically scannable code serves as a reference copy that must match the electrically readable code. This copying mechanism simplifies the verification logic, as the printing device only needs to compare the two codes for equality rather than perform complex validation procedures.
Data Source
AI summary
A first authorization code on a consumable item for a printing device is optically scanned. A second authorization code on the consumable item is electrically read by the printing device upon the insertion of the consumable item into the printing device. In response to determining that the first and second authorization codes match, the printing device is authorized to use the consumable item for printing.