Blade Replacement Controller for Digital Printing Systems

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing digital printing systems using intermediate transfer members face challenges in efficiently applying and regulating liquid treatment formulations, leading to issues with image quality and blade maintenance.

Innovation Solution

A printing system with a blade-replacement controller that coordinates the replacement of blades in a coating thickness-regulation assembly, ensuring that blade replacements occur only when specific pre-determined sections of the intermediate transfer member traverse the excess-removal location.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If doctor blades are frequently replaced to maintain proper liquid solution application, then image quality is improved, but device complexity and maintenance time increase

Engineering Contradiction:

Improveimage qualityVSAvoidblade replacement complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The blade replacement controller automatically monitors blade condition and executes replacement operations without manual intervention, allowing the system to service itself and maintain optimal image quality continuously

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system incorporates sensors and controllers that monitor blade condition and liquid solution application quality, providing feedback that triggers automated blade replacement when degradation is detected, ensuring consistent image quality

Inventive Principle:

Principle #23Feedback

2Manufacturing precision

If blade replacement is performed continuously to maintain liquid solution application, then coating uniformity is improved, but productivity decreases due to operational interruptions

Engineering Contradiction:

Improvecoating uniformityVSAvoidprinting press productivity

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The blade replacement controller predicts blade degradation and schedules replacements in advance during planned maintenance windows, preventing unexpected interruptions and maintaining continuous printing operations

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system maintains continuous liquid solution application and printing operations by implementing predictive blade replacement scheduling that prevents degradation-induced interruptions while minimizing downtime through advance planning

Inventive Principle:

Principle #20Continuity of useful action

3Adaptability or versatility

If manual blade replacement is used to maintain liquid solution application, then blade replacement flexibility is improved, but labor requirements and operational time increase

Engineering Contradiction:

Improveblade replacement flexibilityVSAvoidblade replacement time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The system replaces manual mechanical blade replacement operations with an automated blade replacement controller that uses sensors, actuators, and control algorithms to execute replacements, eliminating labor time while maintaining operational flexibility

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The automated blade replacement system monitors its own operational conditions and executes replacements autonomously, reducing dependency on manual labor while maintaining the flexibility to adapt to different printing requirements

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

This solution ensures continuous and efficient removal of excess liquid treatment formulation, maintaining image quality and reducing the need for frequent blade replacements.

Implementation Method 1

a blade, the tip of which removes an excess of liquid treatment formulation from a surface of a portion of the intermediate transfer member traversing the treatment station to leave a layer of treatment formulation on the surface of the intermediate transfer member of a pre-determined thickness

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Data Source

PatentUS20250153482A1Digital printing system

Publication Date: 2025.05.15 LANDA

AI summary

A printing system comprises an intermediate transfer member (ITM), an image forming station, a conveyer for driving rotation of the ITM, and a treatment station disposed downstream of the impression station and upstream of the image forming station configured for coating the ITM surface with a layer of a liquid treatment formulation, the treatment station comprising an applicator for applying the liquid treatment formulation to the ITM, a coating thickness-regulation assembly comprising a plurality of blades, a blade-replacement mechanism, and a blade-replacement controller for controlling the blade-replacement mechanism.