Paper Feed Mechanism; Ink System - Epson Stylus COLOR 440 Service Manual

EPSON Stylus COLOR 440, 640, and 740

Paper Feed Mechanism

When the ASF loads paper into the printer, the PF and pinch rollers
receive it. These rollers in turn move the paper across the platen,
where printing takes place, and feed it out through the eject rollers. The
top eject roller is notched and set back from the lower eject roller at a 5-
degree angle toward the platen. This compensates for paper curl and
allows the trailing (top) edge of the paper to pass under the printhead
without bending.
Figure 2-9. Paper Feed Mechanism

2.1.7 Ink System

The ink system consists of the following:


ink cartridge


printhead capping mechanism


carriage lock


cleaning blade


ink pump


waste ink drain pad
Although the PF motor drives both the paper feed mechanism and the
ink pump, the gear linkage contains no special mechanism to
disengage these systems. However, this does not mean the pump is
always pumping ink. For the ink pump to operate, the printhead must
be capped by the capping mechanism (to create a vacuum seal) and
the PF motor must turn the pump in the appropriate direction (to engage
the pump drive rollers).
Figure 2-10. Ink System Mechanism
Chapter 2 Operating Principles
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