Static Eliminator Mode Switching for Consistent Charge Settings

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Solution Overview

Problem

Inconsistent settings for sheet neutralization and electric charge adjustment between the operating unit on the image forming apparatus and the static eliminator lead to user confusion and decreased usability.

Innovation Solution

An image forming system with a static eliminator and electric charge adjustment apparatus that allows settings to be made via both the operating unit on the image forming apparatus and the static eliminator, ensuring consistency through a mode setting unit to prioritize settings from either source.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If settings for neutralization and electric charge adjustment can be made via both the operating unit on the image forming apparatus and the operating unit on the static eliminator, then user convenience and accessibility are improved, but setting consistency deteriorates leading to user confusion

Engineering Contradiction:
Improvesettings accessibilityVSAvoidsettings consistency
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

A mode setting unit is introduced as an intermediary between the two operating units. This mode setting unit receives mode setting operations and controls the selection of which operating unit's settings are reflected, thereby mediating the conflict between multiple setting access points and ensuring setting consistency.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The system dynamically switches between two modes: a first mode where the static eliminator's operating unit settings are reflected, and a second mode where the image forming apparatus's operating unit settings are reflected. This dynamic mode switching allows the system to adapt to different user preferences while maintaining consistency within each mode.

Inventive Principle:
Principle #15Dynamics

2Reliability

If a mode setting unit is introduced to prioritize settings from one source, then settings consistency is improved, but device complexity increases

Engineering Contradiction:
Improvesettings consistencyVSAvoidcontrol system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The mode setting unit serves multiple functions: it receives mode setting operations, determines which operating unit's settings to reflect, and controls the selection between first mode and second mode. By consolidating these control functions into a single multi-functional unit, the increase in complexity is minimized while achieving setting consistency.

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

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

Enhances usability by ensuring consistent and user-friendly settings for neutralization and charge adjustment, reducing confusion and improving the overall operation of the system.

Implementation Method 1

applies voltage to every other sheet being fed to electrostatically charge the surfaces of the stacked sheets to have the same polarity

Methodology Applied
Scientific EffectElectrostatic charge: Electrostatics

Data Source

PatentEP4711856A1Static eliminator, image forming system, and electric charge adjustment apparatus
Publication Date: 2026.03.18 CANON KK
  • EP4711856A1 patent drawingFigure 1
  • EP4711856A1 patent drawingFigure 2
  • EP4711856A1 patent drawingFigure 3

AI summary

An image forming system (400) includes an image forming apparatus (100) configured to form an image on a sheet (S), and a static eliminator (300) having a charge eliminating component (51b) configured to neutralize a sheet (S) having an image formed by the image forming apparatus. The static eliminator includes a first setting unit (54a) configured to set a voltage to be applied to the charge eliminating component. The image forming apparatus includes a second setting unit (157) configured to set a voltage to be applied to the charge eliminating component. The image forming system includes a third setting unit (153; 54c) configured to set which voltage is applied as a voltage to be applied to the charge eliminating component, the voltage set by the first setting unit or the voltage set by the second setting unit.