Toner Resupply Path Layout for Continuous Image Forming

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Solution Overview

Problem

Existing electrophotographic image forming apparatuses require frequent replacement of developer containers, which is inconvenient and inefficient.

Innovation Solution

The image forming apparatus is equipped with multiple developer containers and mount sections for resupply packages, allowing toner to be replenished without detaching the containers, using conveyance passages and conveying means to transfer toner from resupply packages to the developer containers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If developer containers are replaced frequently to maintain image quality, then image forming reliability is improved, but user convenience deteriorates and maintenance time increases

Engineering Contradiction:
Improveimage forming reliabilityVSAvoiduser convenience
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The system is divided into a fixed image forming apparatus and a detachable resupply package. The resupply package contains the developer container and can be easily attached and detached, allowing users to replenish developer without replacing entire containers or components, thus maintaining reliability while improving convenience

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

A resupply package serves as an intermediary component between the user and the developer container. The package includes a container shutter that controls developer flow, acting as a mediator that automates the refilling process and eliminates the need for users to manually handle developer material

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If developer containers are replaced frequently, then image forming reliability is improved, but maintenance time increases

Engineering Contradiction:
Improveimage forming reliabilityVSAvoidmaintenance time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The resupply package is prepared in advance with the developer container already filled and sealed. The container shutter is pre-configured to control developer flow automatically upon attachment, eliminating the time-consuming manual refilling process and reducing maintenance time while ensuring reliable operation

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The container shutter automatically controls the flow of developer from the resupply package to the developer container upon attachment, without requiring manual intervention. The system performs the refilling operation autonomously, significantly reducing maintenance time while maintaining image forming reliability

Inventive Principle:
Principle #25Self-service

3Adaptability or versatility

If multiple developer containers are installed for different colors, then image forming versatility is improved, but device complexity increases

Engineering Contradiction:
Improveimage forming versatilityVSAvoiddevice complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The resupply package design is universal and can be used with different colored developers (yellow, magenta, cyan, black). The same package structure and container shutter mechanism work for all color types, allowing the system to handle multiple colors without increasing operational complexity, thus improving versatility while maintaining simplicity

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS20260064042A1Image forming apparatus
Publication Date: 2026.03.05 CANON KK
  • US20260064042A1 patent drawing
  • US20260064042A1 patent drawing
  • US20260064042A1 patent drawing

AI summary

An image forming apparatus includes: a first unit having a first container and a first roller; a second unit having a second container and a second roller; a first section to which a first container is attachable and having a first frame with a first inlet; a second section to which a second container is attachable and having a second frame with a second inlet; a first receptacle provided below the first mount section and communicating with the first inlet; a second receptacle provided below the second mount section and communicating with the second inlet; a first passage extending from the first receptacle to the first container; first means for conveying toner through the first passage; a second passage extending from the second receptacle to the second container; and second means for conveying toner through the second passage.