Epson 440 Manuale Utente

In the cap mechanism, in order to prevent ink from being thickened on the head surface, it is controlled
that the head surface stays adherent to the rubber frame of the cap surface when the power is off.
The absorber is spread in the cap and can hold a certain amount of ink which is absorbed from the
head without draining it to the waste ink pad. Also, in the bottom of absorber, there are two valves in order
to control adhesion of head and cap surface, and one exit to drain ink to the waste ink pad.

If the carriage is out of HP(in this case, in the printable area or paper feed position), the valves on the
cap mechanism stays in the position A in the figure above and are always closed. In this condition,
the carriage collides with flag, actual ink absorption and slight ink absorption are performed.
Also, by moving the carriage to further right side and colliding the flag for opening the valves with
the frame, negative pressure is released in the state that head surface and cap are adhered. This
makes it possible for ink on the nozzle plate surface to be ready for leaving from the cap in the stable
condition.

A

B

Flag for Carriage

Ink Eject Valve

Negative pressure

release valve

Valve

Close state

Release state

Flag for frame

Head surface and 

cap are adhered 

each other. 

Actual and false

absorptions.

Ink absorption in 

the  cap.

During cleaning, initial ink

charge, and right flushing.etc.

During left flushing and paper

feeding,etc.