Canon BJC-55 Service Bulletin

Also see for BJC-55 Series: Service manual User manual Start here User manual Specification

3.3 Purge Section Structure3.3.1 Configurationa) Cap sectionWhen the carriage is at the home position, the cap is pressed against the print headfaceplate to cap the head. The rubber cap connects to the pump, and ink is suckedfrom the head by the pump during cleaning. The sucked ink is absorbed by the inkabsorber in the pump and finally collected in the waste-ink absorber. The cap ismoved by the p pump arm, which is driven by the pump gear. Therefore, theb) Wiper sectionThe wiper wipes excess ink off the print head faceplate when the carriage movesfrom 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 thepump gear.c) Pump sectionThe pump contains a rubber piston, whose piston shaft is linked with the cylindergear. The cylinder gear is rotated by the pump gear. Then the pump is opened toabsorb the ink collected in the cap into the waste ink absorber. The ink in the capflows into the absorber in the pump, and then into the waste ink absorber.d) Waste ink absorberThe ink sucked from the cap and the ink collected in the pump are sucked into theabsorber in the pump, and absorbed into the waste-ink absorber.Part 4: Technical Reference BJC-504-28Paper Feed W-gearTrigger GearPaper Feed GearPump GearPump ArmCylinder GearWaste Ink AbsorberPumpCapWiperPiston ShaftFigure 4-21 Purge Section Structure