Replaceable Printbar Assembly for Web Press Printhead Maintenance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In web press printers, the maintenance and replacement of printheads are time-consuming and can disrupt the alignment of printheads relative to the media web, as they typically require removal from a support frame and reconnection to external supply sources.
Innovation Solution
A printbar assembly with a connection mechanism at one end for easy removable connection to external supply sources, featuring separate routing lines for power, fluid, or data to each printhead cartridge, and a distribution mechanism that simplifies the inspection and replacement of fuses and fluid conduits, allowing for convenient and efficient removal and replacement of the printbar assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If printheads are removed from support frame for maintenance, then maintenance access is improved, but alignment of printheads relative to media web is compromised and removal time increases
Solution Approach 1:
The system is divided into modular components: printbars that can be independently removed from the support frame while printheads remain attached to the printbars. This segmentation allows maintenance of individual printbars without disturbing the overall printhead array alignment with the media web.
Solution Approach 2:
The patent employs disposable or easily replaceable printbar assemblies that can be quickly swapped out for maintenance or color changes. Rather than maintaining individual printheads, entire printbar assemblies are replaced as units, reducing alignment complexity and maintenance time.
2Adaptability or versatility
If printheads are removed and reconnected to external supply sources, then maintenance flexibility is improved, but maintenance time increases
Solution Approach 1:
The patent merges the printhead, printbar, and fluid supply connections into an integrated assembly. The printbar contains built-in fluid conduits and connection mechanisms that maintain fluid supply to printheads during maintenance operations, eliminating the need to disconnect and reconnect external supply sources.
Solution Approach 2:
The printbar serves as an intermediary component between the external fluid supply sources and the printheads. It includes integrated fluid distribution mechanisms that maintain continuous fluid supply during printhead maintenance, acting as a mediator that eliminates the need for disconnection and reconnection operations.
3Adaptability or versatility
If separate routing lines are used for each printhead cartridge, then individual supply control is improved, but device complexity increases
Solution Approach 1:
The patent transitions from individual external routing lines to a two-dimensional integrated fluid distribution system within the printbar. Fluid conduits are embedded in the printbar structure with distribution points positioned at each printhead location, simplifying the overall routing architecture while maintaining individual supply control.
Data Source
AI summary
A web press printer includes a frame spaced above a media support and at least one printbar removably secured to the frame. The at least one printbar supports an array of printheads extending generally transverse to the media support. The at least one printbar also includes a connector and a routing mechanism. The connector is configured to releasably connect to an element supply that is external to the at least one printbar. The routing mechanism is in communication with the element supply via the connector and configured to separately route the supplied element to each respective printhead.