Toner Refill Authentication and Error History for Overflow Prevention

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Solution Overview

Problem

Existing image forming apparatuses face challenges in accurately determining the availability of toner refill and managing errors during the toner refill process, leading to potential toner overflow and inefficiencies.

Innovation Solution

The system includes a toner refill apparatus with a memory chip that stores information about its usage history and authenticity, allowing the image forming apparatus to authenticate and manage toner refills, detect errors, and prevent overflow by adjusting refill criteria based on error history and toner levels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of moving object

If the image forming apparatus performs toner refill using a toner refill apparatus, then the toner level is restored and operational continuity is improved, but errors may occur during the refill process leading to toner overflow and system reliability degradation

Engineering Contradiction:
Improvetoner refill availabilityVSAvoidrefill process reliability
Core Design Contradiction:
Duration of action of moving objectVSReliability

Solution Approach 1:

The system performs preliminary authentication of the toner refill apparatus using a memory chip before initiating the refill process. Error history is pre-checked and refill criteria are pre-adjusted based on previous error patterns, preventing potential overflow before it occurs

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system implements feedback mechanisms by storing error history in the memory chip of the toner refill apparatus and using this information to dynamically adjust refill criteria. The controller monitors the refill process and uses feedback from error patterns to modify authentication and control parameters for subsequent refills

Inventive Principle:
Principle #23Feedback

2Reliability

If the system implements strict error handling and authentication protocols, then toner overflow is prevented and system reliability is improved, but the complexity of the refill management system increases

Engineering Contradiction:
Improvetoner refill management reliabilityVSAvoidrefill management complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The toner refill apparatus carries its own memory chip that stores authentication data and error history self-contained within the refill cartridge. This self-service approach allows the system to perform authentication and error checking without requiring complex external verification systems

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The memory chip acts as an intermediary carrier that holds authentication information and error history between the toner refill apparatus and the controller. This intermediary simplifies the interface by consolidating verification data in a single accessible component

Inventive Principle:
Principle #24Intermediary (Mediator)

3Measurement precision

If error information is stored in the memory chip of the toner refill apparatus, then error tracking accuracy is improved and overflow prevention is enhanced, but the difficulty of detecting and measuring error states increases

Engineering Contradiction:
Improveerror detection accuracyVSAvoiderror state detection difficulty
Core Design Contradiction:
Measurement precisionVSDifficulty of detecting and measuring

Solution Approach 1:

The system merges error history, authentication data, and refill criteria into a single integrated memory chip within the toner refill apparatus. This consolidation simplifies detection by providing all error-related information in one accessible location rather than分散 across multiple systems

Inventive Principle:
Principle #5Merging (Combining)

Data Source

PatentEP3765915B1Method for error handling in the toner refill process
Publication Date: 2026.04.01 HEWLETT PACKARD DEVELOPMENT COMPANY LP
  • EP3765915B1 patent drawingFigure 1
  • EP3765915B1 patent drawingFigure 2
  • EP3765915B1 patent drawingFigure 3

AI summary

An image forming apparatus is provided. The image forming apparatus includes a print engine to perform a print job by using a toner filled in a toner cartridge, a communication apparatus to communicate with a memory chip attached to a toner refill apparatus refilling the toner in the toner cartridge, and a processor to, based on an error being found in a toner injection process for the toner cartridge by using the toner refill apparatus, store information related to the error in the toner cartridge.