Air-Driven Toner Replenishment for Dual Developing Units

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing electrophotographic image forming apparatuses face challenges in efficiently replenishing developing containers with toner without replacing the entire development unit, leading to inefficiencies and potential exposure of internal components during toner replenishment.

Innovation Solution

The image forming apparatus incorporates a system where toner containers are detachably attached and utilize air pressure to convey toner from the containers to the developing units through dedicated passages, ensuring seamless replenishment without exposing internal components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the entire development unit is replaced to replenish toner, then the developing container is replenished with toner, but the operation becomes inefficient and internal components may be exposed

Engineering Contradiction:

Improvetoner replenishment reliabilityVSAvoidtoner replenishment efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The invention separates the toner container from the development unit, allowing the toner container to be independently replaced while the development unit remains in place. This segmentation enables efficient toner replenishment by only replacing the consumable toner container rather than the entire development unit, thus improving productivity while maintaining reliability.

Inventive Principle:

Principle #1Segmentation

2Reliability

If the development unit is replaced for toner replenishment, then toner is replenished, but internal components are exposed during the process

Engineering Contradiction:

Improvetoner replenishment reliabilityVSAvoidcomponent exposure

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

By segmenting the toner container from the development unit, the invention allows toner replenishment through simple container replacement without exposing the internal components of the development unit. The toner container is designed as a separate replaceable module that interfaces with the development unit, eliminating the need to open or expose sensitive internal components during toner replenishment.

Inventive Principle:

Principle #1Segmentation

3Volume of moving object

If a compact design is implemented, then the apparatus size is reduced, but maintenance access may be limited

Engineering Contradiction:

Improveapparatus volumeVSAvoidmaintenance accessibility

Core Design Contradiction:

Volume of moving objectVSEase of repair

Solution Approach 1:

The invention implements a dynamic maintenance system where the toner container is designed for easy hot-swapping without requiring apparatus disassembly. The container features quick-release mechanisms and guide structures that enable maintenance personnel to access and replace the toner container through a simple front-access operation, maintaining ease of repair despite the compact integrated design.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The invention introduces an intermediary interface mechanism between the toner container and development unit that facilitates easy connection and disconnection. This intermediary structure includes guide rails, positioning features, and quick-release latches that enable maintenance personnel to access and replace the toner container through a compact front-access opening, eliminating the need for large access panels while maintaining ease of repair.

Inventive Principle:

Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach enables efficient toner replenishment, minimizes the need for replacing the development unit, and allows for a compact design while maintaining easy access for maintenance.

Implementation Method 1

a pump unit configured to send out air... the first toner discharged from the first discharge port is passed through the first passage to replenish the first developing container by the air discharged from the first discharge port and flowed into the first passage

Methodology Applied

Scientific EffectAir pressure: Pressure Increase

Data Source

PatentUS20260003301A1Image forming apparatus

Publication Date: 2026.01.01 CANON KK

AI summary

An image forming apparatus includes an apparatus main body that includes first and second developing units, an air pump unit, a first toner container accommodating first toner and including a first intake port and a first discharge port, a second container accommodating second toner and including a second intake port and a second discharge port, a first passage communicating with the first discharge port and extending to the first developing container, and a second passage communicating with the second discharge port and extending to the second developing container. The first toner is passed through the first passage to replenish the first developing container by the air discharged from the first discharge port and flowed into the first passage. The second toner is passed through the second passage to replenish the second developing container by the air discharged from the second discharge port and flowed into the second passage.