Fluid-Filled Printhead Storage for Preserved Fluid Volume
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Solution Overview
Problem
Air ingestion into printhead fluid chambers during decoupling and recoupling from fluid supplies leads to reduced printing fluid volume, affecting printhead performance and lifespan.
Innovation Solution
Use of printhead storage devices and switching stations that maintain a fluid connection to a receptacle filled with printing fluid, even when printheads are not in operation, using caps to prevent ambient air ingestion and biasing elements to ensure fluid flow only one way.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If printheads are decoupled from fluid lines to enable printhead replacement or storage, then ease of operation is improved, but air ingestion occurs leading to reduced printing fluid volume and worsened reliability
Solution Approach 1:
A storage device acts as an intermediary between the printhead and ambient environment. The storage device includes a receptacle that receives the printhead and a fluid reservoir that maintains fluid connection. This intermediary structure allows easy printhead insertion/removal while preventing air ingestion through the fluid-filled environment.
Solution Approach 2:
The storage device creates a fluid-filled inert environment within the receptacle. The printing fluid in the reservoir and the sealed environment prevent air from contacting the printhead nozzles and fluid chambers, eliminating air ingestion while maintaining operational flexibility.
2Adaptability or versatility
If printheads remain decoupled from fluid supplies to extend operational flexibility, then adaptability is improved, but air ingestion leads to reduced printhead lifespan
Solution Approach 1:
The storage device serves as a mediator that maintains fluid connection during non-operational states. The fluid reservoir and connected fluid path ensure the printhead remains in a fluid-filled environment, preventing air ingestion and extending lifespan while allowing flexible print mode switching and printhead replacement.
Solution Approach 2:
The storage device prepares the printhead for future use by maintaining it in a fluid-filled state during storage. This preliminary action of keeping the printhead filled with printing fluid prevents air ingestion and maintains readiness for subsequent operational use, extending overall lifespan.
3Ease of operation
If ambient air contacts printhead nozzles during storage, then ease of operation is improved, but printing fluid evaporates and image quality deteriorates
Solution Approach 1:
The storage device creates a sealed, fluid-filled inert environment that isolates the printhead from ambient air. The printing fluid in the reservoir and the enclosed receptacle prevent evaporation and contamination, maintaining image quality while providing easy printhead storage and retrieval.
Data Source
AI summary
According to an example, a printhead storage device comprises a printhead pocket to receive a printhead, a receptacle with an interior chamber wherein printing fluid is provided, and a fluid interconnect device comprising a fluid path with the interior chamber. Upon insertion of a printhead to the pocket, the fluid interconnect device is connected to the printhead, thereby providing a fluid connection between the printhead and the interior chamber and wherein the printhead is not operable when inserted in the printhead pocket.