Ink Stack Venting for Stable Nozzle Adsorption Pressure
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Solution Overview
Problem
Ink stacks in printing devices can cause damage to nozzles due to unstable or excessive negative pressure suction, leading to blockages and nozzle deterioration.
Innovation Solution
An ink stack design featuring a maintenance base, ink pad assembly with an adsorption groove, air pump, vent tube, and air-tight member, controlled by a main control board to manage pressure and prevent nozzle damage through pressure relief and adsorption control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the negative pressure device operates to suck away ink or dirt from the nozzle, then the possibility of blockage is reduced, but the nozzle is prone to damage due to unstable negative pressure suction or excessive adsorption force
Solution Approach 1:
The patent introduces an air-tight member as an intermediary component between the negative pressure device and the nozzle. This member can open or close the vent tube to regulate pressure, acting as a mediator that prevents direct excessive negative pressure from damaging the nozzle while still allowing ink removal functionality
Solution Approach 2:
The patent changes the pressure parameter dynamically by controlling the opening and closing of the vent tube through the air-tight member. The main control board adjusts the pressure state based on operational needs, transitioning between closed (negative pressure maintenance) and open (pressure relief) states to prevent nozzle damage
2Object-affected harmful factors
If the vent tube is always open to relieve pressure, then nozzle damage is prevented, but negative pressure suction effectiveness is reduced
Solution Approach 1:
The patent makes the vent tube dynamic rather than static, using the air-tight member to control its opening and closing states. The system transitions from a fixed configuration to a dynamic one where the vent tube can be opened or closed based on real-time operational requirements, optimizing both pressure relief and suction effectiveness
3Object-affected harmful factors
If the air-tight member is added to control pressure, then nozzle damage is reduced, but device complexity increases
Solution Approach 1:
The air-tight member is designed with multi-functionality, serving both as a pressure control mechanism and as part of the sealing system. The main control board integrates pressure monitoring and control functions, making the system more versatile while managing complexity through functional consolidation
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 solution effectively reduces the risk of nozzle damage by stabilizing negative pressure and controlling adsorption force, prolonging nozzle lifespan and preventing blockages.
Implementation Method 1
the negative pressure device may be used to form a negative pressure environment at a preset position of the ink stack. When the nozzle reaches the preset position of the ink stack, the negative pressure device may be configured to suck away ink or other dirt on the nozzle
Implementation Method 2
the vent tube may be used to relieve pressure from the adsorption groove, thereby controlling the force on the nozzle and reducing the possibility of damage to the nozzle due to excessive adsorption pressure
Data Source
AI summary
An ink stack and a printing device are disclosed. The ink stack may comprise an ink pad assembly, a maintenance base, an air pump, and/or a vent tube. The ink pad assembly may have an adsorption groove for adsorbing a nozzle. The ink pad assembly is mounted on the maintenance base. The air pump may be connected to the adsorption groove through an exhaust tube. The vent tube may be connected to the exhaust tube, and the vent tube may be used to connect the exhaust tube with the atmosphere. The ink pad assembly may be used to adsorb the nozzle, and the vent tube may be used to relieve pressure from the adsorption groove, thereby controlling the force on the nozzle and reducing the possibility of damage to the nozzle due to excessive adsorption pressure or pressure changes.