Operation - Canon BJC-55 Service Bulletin

BJC-50

3.3.2 Operation

The purge section is driven by the paper feed motor.
The paper feed motor drives the paper feed gear through the paper feed double gear.
When the carriage moves to the right from the home position, the trigger gear rotates
along with the paper feed gear, which rotates the pump gear and cylinder gear. At
this time while the ink is stored in the cap, the cylinder gear rotates so as to move the
piston shaft to the right. After that, the piston shaft is moved to the left so that the
ink in the cap is absorbed into the waste ink absorber.
The cap moves up and down as the pump arm moves along the pump gear cam.
(Capping)
Cap
Wiper
Waste Ink Absorber
Figure 4-22 Purge Operation
4-29
Part 4: Technical Reference
Paper Feed Double Gear
Trigger Gear
Paper Feed Gear
Pump Gear
Pump Arm
Cylinder Gear
Pump
Piston Shaft
Piston Rings