Pneumatic Integrated Valve for Heated Ink Reservoirs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing melter devices in liquid ink printing systems face challenges with valves that require direct human interaction, have a large footprint, are expensive, or introduce contaminants, and struggle to operate in high-temperature, pressurized environments.
Innovation Solution
A pneumatic integrated multi-valve structure that combines multiple shut-off functions into a single, pneumatically driven valve, using a monolithic shaft with seals and a piston to control ink flow and prevent backpressure, allowing for a large filter surface area and operation in heated conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional shut-off valves are used in melter devices, then ink flow can be stopped, but the valves have a large footprint and require direct human interaction
Solution Approach 1:
The patent combines multiple valve functions (inlet shut-off and outlet shut-off) into a single integrated valve assembly that is automatically actuated by a pneumatic cylinder. This merging eliminates the need for separate manually-operated valves, reducing the overall footprint while enabling automated control through the pneumatic actuation system.
Solution Approach 2:
The valve system is designed to automatically open and close based on pneumatic pressure signals from the control system. The pneumatic cylinder self-actuates the valve mechanism without requiring direct human interaction, allowing the system to service itself through automated pneumatic control that responds to ink level and pressure conditions.
2Reliability
If multiple separate shut-off valves are used to control inlet and outlet, then ink flow control is achieved, but device complexity and cost increase
Solution Approach 1:
The patent integrates both inlet and outlet shut-off functions into a single valve assembly that is simultaneously actuated by one pneumatic cylinder. This unified structure reduces the number of separate components, simplifies the overall device complexity, and lowers cost while maintaining reliable ink flow control through the combined valve mechanism.
Solution Approach 2:
The single valve assembly performs multiple functions: it controls both the inlet and outlet of the melter tank, and can operate in different positions (fully open, fully closed, or partially open) to regulate ink flow in both directions. This multi-functionality eliminates the need for separate specialized valves for each function.
3Reliability
If traditional valves are used in heated environments, then ink flow control is possible, but contaminants may be introduced and material compatibility becomes problematic
Solution Approach 1:
The valve incorporates disposable ink-compatible seals that can be easily replaced. These seals are designed to be cost-effective and can withstand the heated environment temporarily before being replaced, eliminating the need for expensive, complex, high-temperature-resistant permanent seals while preventing contaminant introduction through regular replacement of clean seals.
Solution Approach 2:
The valve system is designed to operate within specific temperature and pressure parameters that are compatible with ink-compatible materials. By controlling the thermal and pressure parameters within acceptable ranges, the system maintains material compatibility and prevents contaminant introduction while still achieving reliable ink flow control in the heated melter environment.
4Reliability
If separate shut-off valves are used for inlet and outlet, then ink flow control is achieved, but manufacturing cost increases
Solution Approach 1:
The patent combines inlet and outlet shut-off functions into a single integrated valve assembly, reducing the total number of components that need to be manufactured and assembled. This merging simplifies the manufacturing process, reduces part counts, and lowers overall manufacturing cost while maintaining reliable ink flow control through the unified valve mechanism.
Solution Approach 2:
The single valve assembly is designed to perform multiple shut-off functions (inlet and outlet control) within one manufactured component. This multi-functional design eliminates the need to manufacture and assemble multiple separate valves, reducing manufacturing complexity and cost while achieving the same level of ink flow control reliability.
Data Source
AI summary
An inlet seal, an outlet seal, and a piston are connected to a shaft. The inlet seal seals an ink inlet of an ink reservoir. The outlet seal seals an ink outlet of the ink reservoir. Also, the piston is within a cylinder. The inlet seal, the outlet seal, and the piston all move with the shaft. A biasing member contacts the piston to bias the piston in a first direction. Pressurized air simultaneously provided to the cylinder and to the ink reservoir biases the piston in a second direction, opposite the first direction, and pressurizes ink within the ink reservoir. Moving the shaft in the first direction does not seal the ink inlet but does seal the ink outlet. Moving the shaft in the second direction seals the ink inlet but does not seal the ink outlet, thus allowing the pressurized ink out from the ink reservoir.