Retractable Printhead Wiper for Compact Maintenance
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Solution Overview
Problem
Current printhead maintenance systems for inkjet printers are bulky and inefficient, particularly when dealing with print bars that have many printheads, as they require a large footprint to accommodate the movement of wiper blades and purge receptacles, which hinders space efficiency and maintenance accessibility.
Innovation Solution
A retractable wiper blade mechanism that moves independently along guide tracks, allowing for orthogonal movement across the printhead face, reducing the required space for maintenance and enabling simultaneous cleaning of multiple printheads without increasing the overall system size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional non-retractable wiper blades are used in printhead maintenance systems, then the wiper blades can effectively clean the printhead faceplates, but the maintenance system requires a large footprint and bulky structure
Solution Approach 1:
The wiper blade is made retractable, transitioning from a static to a dynamic configuration. The blade can extend to contact the printhead faceplate during cleaning operations and retract to a stored position when not in use, allowing the maintenance system to have a compact footprint while maintaining full cleaning capability.
Solution Approach 2:
The wiper blade moves along guide tracks that provide orthogonal movement across the printhead faceplate, utilizing a different spatial dimension for the cleaning action. This orthogonal movement allows effective cleaning without requiring the maintenance system to occupy proportional space in all directions.
2Ease of operation
If traditional maintenance systems accommodate movement of wiper blades and purge receptacles, then cleaning function is provided, but the system becomes bulky and maintenance accessibility is hindered
Solution Approach 1:
The maintenance system is segmented into independent functional modules: the retractable wiper blade assembly that moves independently along guide tracks, and the purge receptacle assembly that can be positioned separately. This segmentation allows each component to perform its function without requiring the entire system to be bulky, improving both simplicity and accessibility.
3Productivity
If the maintenance system is designed to handle multiple printheads, then cleaning coverage is improved, but the required space increases
Solution Approach 1:
The retractable wiper blade moves in a direction orthogonal to the printhead array arrangement, allowing a single wiper to service multiple printheads in sequence. This orthogonal movement dimension enables extended cleaning coverage without proportionally increasing the system's footprint, as the wiper traverses across rather than alongside the printhead array.
Data Source
AI summary
A printhead maintenance system for a printing machine having at least one printhead, the system includes a body, at least one guide track supporting the body for movement along the at least one guide track in proximity to the face of the printhead, and a drive mechanism in engagement with the body and operable to move the body along the guide track. A wiper blade is movably mounted on said body for movement between a retracted position in which the wiper blade cannot contact the face of the printhead and an operative position in which the wiper blade can contact the face of the printhead. A biasing mechanism is provided between the wiper blade and the body that is configured to bias the wiper blade to the operative position. The system includes a retraction mechanism that is operable to move the wiper blade to the retracted position upon movement of the body along the guide track.