Multi-Pass Printer Print Bar with Movable Beam
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Solution Overview
Problem
In printers, uneven usage of nozzles due to relative movements between the print bar and print target leads to nozzle degradation and visible printing irregularities, as some nozzles are more used than others, resulting in defects and printing artifacts.
Innovation Solution
A multi-pass printer design with a static and movable print bar configuration, where the print bar beam is supported by sliders providing translational and rotational degrees of freedom, allowing for even nozzle usage through controlled movements and adjustments, ensuring consistent printing quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the print bar and print target are moved relative to each other in a multi-pass printing process, then the entire print target can be covered by the print area, but uneven usage of nozzles occurs leading to degradation and printing irregularities
Solution Approach 1:
The patent applies the dynamics principle by making the print bar movable along its longitudinal axis through a moveable part (print bar beam) that can translate relative to the static part. This dynamic adjustment allows the print bar to shift position between passes, distributing nozzle usage more evenly across different sections of the print bar, thereby preventing localized degradation and ensuring consistent printing quality throughout the entire print target area.
2Reliability
If the print bar is made fully movable to distribute nozzle usage, then printing quality consistency improves, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the print bar into two distinct parts: a static part that remains fixed and provides structural stability, and a moveable part (print bar beam) that can translate along the longitudinal axis. This segmentation allows only the necessary portion of the print bar to move, distributing nozzle usage evenly while avoiding the complexity of making the entire print bar movable. The static part maintains structural integrity while the moveable part handles the positioning function.
Data Source
AI summary
A print bar for a for a multi-pass printer, the print bar comprising a static part configured to extend across a print area of a print target and a moveable part comprising a print bar beam and printer comprising such a print bar.