Dummy Cartridge Fluid Bridge for Ink Circulation
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Solution Overview
Problem
Printing fluids with heavy pigments or particles tend to precipitate when not in motion, leading to clogging issues in printers, especially when printhead cartridges are removed or not in use, disrupting fluid recirculation systems.
Innovation Solution
A dummy cartridge with an accessory device forming a fluid interconnect bridge, allowing ink circulation even when a printhead cartridge is removed, using hollow needles connected by a bridge channel to maintain a closed loop and prevent precipitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a printhead cartridge is removed from the printer, then the risk of clogging is reduced, but fluid circulation is interrupted causing pigment precipitation
Solution Approach 1:
A dummy cartridge is introduced as an intermediary component that replaces the removed printhead cartridge. This dummy cartridge contains internal fluid channels that allow printing fluid to circulate through it, maintaining the closed loop circulation system and preventing pigment precipitation while the actual printhead is removed or not in use.
Solution Approach 2:
The fluid circulation system is segmented into separate functional components: the dummy cartridge contains fluid channels for circulation, while the actual printhead cartridge can be independently removed. This segmentation allows the circulation function to be maintained separately from the printing function.
2Stability of the object's composition
If printing fluid circulates continuously, then pigment dispersion is maintained, but device complexity increases
Solution Approach 1:
The dummy cartridge serves multiple functions: it maintains fluid circulation through internal channels, provides a physical placeholder in the cartridge slot, and enables the printer to operate with removed or depleted printheads. This multi-functionality reduces the need for additional separate components.
3Stability of the object's composition
If a dummy cartridge is used to maintain circulation, then fluid homogeneity is preserved, but device complexity increases
Solution Approach 1:
The dummy cartridge is designed as a simplified copy or replica of the actual printhead cartridge, containing only the essential fluid circulation channels without the complex printhead assembly. This copying approach maintains the circulation function while using a simpler, more economical structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents ink precipitation and clogging by maintaining fluid circulation, ensuring the homogeneity of printing fluids and reducing waste, even during idle or standby modes.
Implementation Method 1
A fluid recirculation system can be used for circulating the fluid in the printer to keep the heavy pigments or heavy particles dispersed in the fluid
Implementation Method 2
A dummy cartridge with an accessory device forming a fluid interconnect bridge, allowing ink circulation even when a printhead cartridge is removed, using hollow needles connected by a bridge channel to maintain a closed loop
Data Source
AI summary
A device includes a fluid channel connecting a pair of ports and an attachment feature to attach the device at a dummy cartridge; wherein the pair of ports is dimensioned to mate with fluid feed ports of a printer when the device is attached to the dummy cartridge and the dummy cartridge is inserted in the printer.