Static Elimination Control for Multi-Sheet Printing

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Solution Overview

Problem

Existing printing technologies face challenges in effectively eliminating static charges on sheets during the printing process, particularly with different types of paper, leading to sheet sticking and quality issues, which can cause jams and damage to the device.

Innovation Solution

A printing apparatus equipped with a static elimination apparatus that adjusts static elimination settings based on sheet type and environmental conditions, using both hardware and software controls to optimize static elimination for various paper types, including a static elimination roller and ionizer to cancel out charges.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a voltage is applied to conveyance rollers to eliminate static, then static elimination is achieved, but it is difficult to handle multiple sheet types and environmental conditions

Engineering Contradiction:

Improveability to handle multiple sheet typesVSAvoidcomplexity of adjustment mechanism

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements dynamic adjustment of the static elimination apparatus voltage based on detected sheet charge levels. The control unit modifies operating parameters in real-time according to environmental conditions and sheet type, transforming a static system into a dynamic one that adapts to varying requirements without hardware changes

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the voltage parameter of the static elimination apparatus based on detected charge levels on different sheet types. By adjusting the voltage magnitude according to sheet material properties and environmental conditions, the system achieves versatile static elimination across multiple sheet types using a single apparatus

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If hardware adjustment is used for static elimination, then direct adjustment is easy, but it cannot handle multiple sheet types effectively

Engineering Contradiction:

Improveease of static elimination adjustmentVSAvoidability to handle multiple sheet types

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The system performs self-adjustment by automatically detecting the charge level on sheets and controlling the static elimination apparatus voltage accordingly. The control unit acts as an autonomous regulator that monitors sheet conditions and modifies operating parameters without manual intervention, achieving both ease of operation and multi-sheet-type capability

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent implements a feedback mechanism where the charge level detection unit continuously monitors sheet charge and feeds this information to the control unit. The control unit then adjusts the static elimination apparatus voltage based on this feedback, creating a closed-loop system that maintains optimal operation across varying conditions

Inventive Principle:

Principle #23Feedback

3Adaptability or versatility

If software adjustment is used for static elimination, then multiple sheet types can be handled, but frequent adjustment is troublesome for environmentally sensitive sheets

Engineering Contradiction:

Improveability to handle multiple sheet typesVSAvoidconvenience of adjustment

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The system eliminates the need for manual software adjustment by implementing automatic detection and control. The charge level detection unit continuously monitors sheet conditions and the control unit automatically adjusts the static elimination apparatus, making the system self-sufficient and removing the burden of frequent manual adjustments from the user

Inventive Principle:

Principle #25Self-service

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

The solution ensures effective static elimination across diverse paper types and environmental conditions, preventing sheet sticking and ensuring smooth printing operations while maintaining print quality.

Implementation Method 1

charges opposite to charges charged in a sheet are applied to the sheet via the static elimination rollers, thereby canceling out charged static

Methodology Applied

Scientific EffectElectrostatic charge cancellation: Electrostatic Induction

Implementation Method 2

one or more ionizers configured to eliminate static from the sheet

Methodology Applied

Scientific EffectIon generation: Ionisation

Data Source

PatentUS12535759B2Printing apparatus capable of controlling a static electricity elimination apparatus, control method for controlling printing apparatus, and storage medium

Publication Date: 2026.01.27 CANON KK

AI summary

A control method for controlling a printing apparatus includes storing a static elimination setting value with respect to each sheet, printing an image on a sheet, and in a case where the static elimination setting value stored for the sheet is a numerical value, performing control to eliminate static from the sheet based on the numerical value by using a static elimination apparatus, and in a case where the setting value stored for the sheet is a setting value indicating that a setting value of a hardware setting unit of the static elimination apparatus is used, performing control to eliminate static from the sheet based on a setting value set by using the hardware setting unit.