Fluid Supply Assembly Quick-Release Printhead Attachment

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Solution Overview

Problem

The challenge lies in seamlessly integrating an off-axis printing fluid supply system with a carriage designed for on-axis fluid supply systems, as existing solutions require reconfiguration, increasing development time and costs, and face issues with maintaining a robust fluidic connection during printhead movement.

Innovation Solution

A fluid supply assembly that includes a printhead assembly with a quick-release, hand-operable attachment mechanism and a rigidly attached fluid conduit interconnect using tool-operable fasteners, allowing for easy service and replacement while maintaining a robust connection between the off-axis fluid supply and printhead assembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If an off-axis printing fluid supply system is integrated with a carriage designed for on-axis fluid supply systems, then the fluid supply compatibility is improved, but the development time and costs increase due to reconfiguration requirements

Engineering Contradiction:
Improvefluid supply compatibilityVSAvoiddevelopment time
Core Design Contradiction:
Adaptability or versatilityVSLoss of time

Solution Approach 1:

The carriage is designed with a universal attachment mechanism that can accommodate both on-axis and off-axis fluid supply systems through the fluid conduit interconnect. This multi-functional design allows the same carriage structure to work with different fluid supply configurations without requiring reconfiguration, thereby improving adaptability while avoiding increased development time.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If reconfiguration is performed to integrate off-axis fluid supply with on-axis carriage design, then fluid supply compatibility is improved, but development costs increase

Engineering Contradiction:
Improvefluid supply compatibilityVSAvoiddevelopment costs
Core Design Contradiction:
Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The carriage incorporates a universal attachment mechanism that works with both on-axis and off-axis fluid supply systems, eliminating the need for separate development programs for different fluid supply configurations. This reduces development costs while maintaining fluid supply compatibility.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The fluid conduit interconnect acts as an intermediary component that bridges the off-axis fluid supply system with the on-axis carriage design. This mediator component enables compatibility between different systems without requiring reconfiguration of the carriage itself, thereby reducing development costs.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Ease of repair

If a quick-release attachment mechanism is used for printhead assembly, then service and replacement ease is improved, but connection robustness may worsen

Engineering Contradiction:
Improveservice and replacement easeVSAvoidconnection robustness
Core Design Contradiction:
Ease of repairVSReliability

Solution Approach 1:

The attachment mechanism transitions between two dynamic states: a locked state during printing operations that ensures robust connection, and an unlocked state that enables quick release for service and replacement. This dynamic design allows the system to adapt to different operational requirements, maintaining both connection robustness and ease of repair.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The fluid conduit interconnect serves as an intermediary that maintains robust fluidic connection even when the printhead assembly is quickly attachable and detachable. This mediator component ensures that the fluid supply connection remains reliable during printing operations while allowing easy service and replacement when needed.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentEP3341202B1Fluid supply assembly and method for removably attaching a printhead to a printing system carriage
Publication Date: 2020.10.14 HEWLETT PACKARD DEVELOPMENT COMPANY LP
  • EP3341202B1 patent drawingFigure 1~3
  • EP3341202B1 patent drawingFigure 4a~4c
  • EP3341202B1 patent drawingFigure 5a

AI summary

In an example implementation, a fluid supply assembly includes a printhead assembly and a carriage comprising a quick-release, hand-operable attachment mechanism to removably attach the printhead assembly to the carriage. A fluid conduit interconnect is rigidly attached to the printhead assembly by a tool-operable fastener. The fluid conduit interconnect is to connect to a fluid conduit to communicate printing fluid from an off-axis printing fluid supply to the printhead assembly.