Capping Mechanism - Epson Stylus COLOR 670 Service Manual

EPSON Stylus COLOR 670

2.1.7 Capping Mechanism

The Capping mechanism covers the Printheads with the cap holder to prevent
the ink around the nozzles from increasing viscosity when the printer is in
stand-by mode or when the printer is off.
Capping mechanism moves up when the CR unit moves to the right end of
the CR guide shaft and covers the printhead nozzle plate.
Negative pressure
Closed state
Operating Principles
Stylus COLOR 660
Flag for Carriage
Ink Eject Valve
Valve
Released state
The absorbing
power is low.
Flags for
Frame
Figure 2-10. Valveless Capping Mechanism
Overview
Stylus COLOR 660 has built-in air valves in the capping unit but Stylus
COLOR 670 uses valveless system.
Air valve function used for the previous models pumps and ejects ink only
inside the cap by sucking ink with the valve open. Valveless system is
developed by changing the ink sequence.
When sucking ink only inside the cap (false absorption), this printer moves
printhead to the left from the cap unit (out of the cap) and drives pump to
perform false absorption.
EPSON Stylus COLOR 670
Flag for Carriage
Ink Eject Valve
Negative pressure
Air valve is not assembled
in this portion.
Revision A
41