Pivoting Opposed Inkjet Modules for Compact Print Zones
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Solution Overview
Problem
Existing inkjet printing systems face challenges in minimizing the print zone width, optimizing print quality, and simplifying printhead alignment and replacement processes, particularly in high-speed digital inkjet presses with multiple redundancy in each ink color.
Innovation Solution
A printing unit with a pair of opposed inkjet modules pivotally mounted on a chassis, allowing for clamshell configurations for printing and printhead access, and a mechanism for adjusting printhead skew and spacing, enabling facile alignment and replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If inkjet modules are arranged closely for minimal print zone width, then the width of print zone is minimized, but access to printheads for maintenance becomes difficult
Solution Approach 1:
The inkjet modules are designed to pivot between a closed printing configuration and an open maintenance configuration. This dynamic movement allows the modules to occupy minimal space during printing while providing easy access to printheads when opened, resolving the contradiction between compact size and maintenance accessibility
Solution Approach 2:
The printing system is divided into separate pivotable inkjet modules that can be independently accessed. This segmentation allows maintenance personnel to open individual modules to reach printheads without disrupting the entire printing system, maintaining both compact arrangement and ease of maintenance
2Reliability
If multiple inkjet modules are arranged for full-color printing with redundancy, then print quality and reliability are improved, but alignment complexity and setup costs increase
Solution Approach 1:
Multiple inkjet modules are designed with identical universal mounting interfaces and pivot mechanisms. This standardization simplifies alignment procedures and reduces setup complexity while maintaining the redundancy needed for reliable full-color printing, as each module functions identically and can be easily replaced or adjusted
Solution Approach 2:
The pivotable module design incorporates self-aligning features that reduce the need for complex manual alignment during setup and maintenance. The modules can be independently positioned and secured, simplifying the overall alignment process while maintaining printing reliability
Data Source
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AI summary
A printing unit includes: a unit chassis and a pair of opposed inkjet modules mounted on the unit chassis, each inkjet module having a respective printhead. The inkjet modules are each pivotally mounted on the unit chassis for pivotally moving the inkjet modules towards and away from each other.