Purge Section Structure; Configuration - Canon BJC 50 - Color Inkjet Printer Service Manual

Part 4: Technical Reference

3.3 Purge Section Structure

3.3.1 Configuration

a) Cap section
When the carriage is at the home position, the cap is pressed against the print head
faceplate to cap the head. The rubber cap connects to the pump, and ink is sucked
from the head by the pump during cleaning. The sucked ink is absorbed by the ink
absorber in the pump and finally collected in the waste-ink absorber. The cap is
moved by the p pump arm, which is driven by the pump gear. Therefore, the
b) Wiper section
The wiper wipes excess ink off the print head faceplate when the carriage moves
from left to right. The wiper is moved up or down by the projections on the carriage.
The ink attached to the wiper is removed by the aluminum plate on the head.
Moreover when the wiper comes down, the ink remaining on it is splashed on the
pump gear.
c) Pump section
The pump contains a rubber piston, whose piston shaft is linked with the cylinder
gear. The cylinder gear is rotated by the pump gear. Then the pump is opened to
absorb the ink collected in the cap into the waste ink absorber. The ink in the cap
flows into the absorber in the pump, and then into the waste ink absorber.
d) Waste ink absorber
The ink sucked from the cap and the ink collected in the pump are sucked into the
absorber in the pump, and absorbed into the waste-ink absorber.
Waste Ink Absorber
Figure 4-21 Purge Section Structure
4-28
Cap
Wiper
Paper Feed W-gear
Trigger Gear
Paper Feed Gear
Pump Gear
Pump Arm
Cylinder Gear
Pump
Piston Shaft
BJC-50