Buffer Reservoir for Print Fluid Leak Containment
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Solution Overview
Problem
In printing devices, leaks in print fluid cartridges can cause print fluid to mix with pressure fluid, leading to costly repairs and malfunctions, as the fluid can flow into the pressure system and interface with other components, resulting in undesired operations and service calls.
Innovation Solution
A buffer reservoir is integrated into the pressure system to limit the flow of ink before a leak is detected and repaired, physically separating the pressure system from the print fluid delivery system and using a fluid movement device to apply pressure on the print fluid bag, with a valve to adjust pressure and a sensor to detect ink levels, allowing for containment of leaked fluid within the buffer reservoir.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a pressure system is used to apply pressure on the print fluid bag, then print fluid delivery is improved, but the risk of fluid mixing and system contamination increases
Solution Approach 1:
The system is divided into separate fluid pathways: a first fluid pathway for print fluid from the print fluid container to the print head, and a second fluid pathway for pressure fluid from the fluid movement device to the pressure chamber. This segmentation prevents mixing between print fluid and pressure fluid under normal operating conditions, while still allowing the pressure system to effectively deliver print fluid.
Solution Approach 2:
A common interface is introduced as an intermediary component that connects both the print fluid pathway and the pressure fluid pathway. This interface includes a pressure chamber that receives both print fluid and pressure fluid, allowing the pressure system to apply pressure to the print fluid bag while maintaining separate fluid sources and pathways, thus preventing contamination.
2Power
If the pressure system is directly connected to the print fluid container, then pressure application is efficient, but leak detection and containment become difficult
Solution Approach 1:
The common interface acts as an intermediary between the pressure system and the print fluid container, providing a connection point that allows pressure application while enabling leak detection. The interface design allows the system to maintain efficient pressure transmission to the print fluid bag while providing access points for detecting fluid leaks before they can contaminate other system components.
3Reliability
If print fluid leaks into the pressure system, then fluid mixing occurs causing malfunctions, but adding containment components increases device complexity
Solution Approach 1:
The fluid delivery system is segmented into distinct pathways with clear separation between print fluid and pressure fluid. The print fluid container, pressure chamber, and fluid movement device are configured with separate connection points and pathways, ensuring that even if a leak occurs in one pathway, it cannot easily contaminate the other pathway or system components.
Solution Approach 2:
The common interface serves as a mediator that connects both fluid systems while maintaining their separation. This interface design allows the pressure system to efficiently apply pressure to the print fluid bag while providing inherent containment features that prevent leaked fluid from mixing between systems or reaching other sensitive components.
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
The buffer reservoir effectively contains misappropriated print fluid, preventing it from contaminating other components and reducing the need for costly repairs by isolating the fluid flow within the pressure system, thus maintaining the printing device's functionality until a leak can be serviced.
Implementation Method 1
A print fluid container including a print fluid bag and a pressure chamber surrounding a portion of the bag are coupled to a common interface. A fluid movement device provides a pressure force to the pressure chamber that forces print fluid out of the container.
Implementation Method 2
modifying the pressure system to include a buffer reservoir which may, for example, limit the flow of ink in the pressure system components before a leak is detected and able to be repaired
Data Source
AI summary
In an example, a pressure system includes a fluid movement device, a buffer reservoir coupled to the fluid movement device, and a first fluid interface coupled to the buffer reservoir. In that example, the first fluid interface is able to couple to a pressurizable chamber of a print fluid container (that can apply force on a print fluid bag of the print fluid container).