Printer Check Valve Piston Sealing Ink Leakage

The patent extracts the ink supply path into separate sealed chambers using a piston structure. The piston divides the ink tank into two isolated chambers, allowing the ink supply path to be sealed off from the external environment during non-use periods, preventing evaporation and backflow while preserving ink quantity.

The patent applies preliminary anti-action by using elastic members and sealing rings to preemptively prevent backflow and evaporation before they occur. The sealing mechanism is pre-configured to close automatically when the printer is not in use, counteracting the natural tendency of ink to evaporate or flow backward.

The patent extracts the ink supply path into a sealed, isolated chamber using the piston structure. This separation creates a self-contained system that prevents ink leakage during movement, as the ink is confined within the sealed chamber and cannot escape even when the printer is carried or lifted.

The patent uses elastic members to provide beforehand cushioning against pressure changes during movement. The elastic components absorb and compensate for pressure variations that occur when the printer is moved, preventing ink leakage by maintaining pressure balance before leakage can occur.

The patent implements self-service through an automatic piston mechanism that responds to pressure changes without external control. The elastic members automatically drive the piston to open or close the ink supply path based on pressure differential, eliminating the need for complex external control systems while maintaining reliable ink flow management.

The patent uses pneumatic principles by leveraging pressure differential to drive the piston mechanism. The elastic members convert pressure changes into mechanical motion, automatically controlling the ink supply path opening and closing based on the pressure state, thereby achieving reliable control with a relatively simple structure.