Toner Refill Error Tracking for Overflow-Safe Reuse

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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 previous connections and errors, allowing the image forming apparatus to authenticate and manage toner refill operations, including error detection and prevention of toner overflow by adjusting refill criteria based on stored data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the image forming apparatus performs toner refill without error detection, then the refill process is simple and fast, but toner overflow may occur and refill accuracy deteriorates

Engineering Contradiction:
Improvetoner refill accuracyVSAvoidrefill management system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The toner refill apparatus performs self-authentication by storing its own identification information in an authentication database within the image forming apparatus. The system automatically verifies whether the refill apparatus is authorized and determines appropriate refill quantities based on stored error history, eliminating the need for manual intervention or complex external verification systems.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The system stores error occurrence information from previous refill operations in the authentication database and uses this feedback to adjust subsequent refill decisions. When the same refill apparatus is used again, the system retrieves its error history and modifies refill parameters accordingly, creating a closed-loop control system that improves accuracy based on past performance.

Inventive Principle:
Principle #23Feedback

2Reliability

If the system discards toner refill apparatus after error occurrence, then reliability is improved by preventing future errors, but productivity deteriorates due to loss of reusable refill apparatus

Engineering Contradiction:
Improverefill operation reliabilityVSAvoidrefill operation efficiency
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

Instead of discarding the refill apparatus after error, the system changes operational parameters such as the refill quantity or speed for subsequent operations. The authentication database stores error history and uses it to modify refill parameters, allowing the same apparatus to be reused with adjusted settings that prevent error recurrence while maintaining productivity.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The system recovers the value of error-prone refill apparatus by continuing to use them with modified parameters rather than discarding them. The authentication database enables the system to track and recover value from previously erroneous operations by adjusting future refill parameters based on stored error information.

Inventive Principle:
Principle #34Discarding and recovering

3Measurement precision

If the system performs authentication and error checking during toner refill, then refill accuracy is improved, but the refill process time increases

Engineering Contradiction:
Improverefill quantity accuracyVSAvoidrefill process time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

Authentication information and error history are stored in advance in the authentication database within the image forming apparatus. When a refill operation is initiated, the system quickly retrieves pre-stored authentication data and error history rather than performing lengthy verification processes, significantly reducing the time required for authentication while maintaining accuracy.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentEP4730047A2Method for error handling in the toner refill process
Publication Date: 2026.04.22 HEWLETT PACKARD DEVELOPMENT COMPANY LP
  • EP4730047A2 patent drawingFigure 1
  • EP4730047A2 patent drawingFigure 2
  • EP4730047A2 patent drawingFigure 3

AI summary

A toner refill apparatus is provided. The apparatus includes a memory chip to store information of the toner refill apparatus and error information of an injection process. The error information includes a number of dockings of the toner refill apparatus and/or information indicating whether an error has occurred in the injection process. The memory chip is to store completion information indicating that an injection using the toner refill apparatus has been completed.