Black Bj Cartridge Structure - Canon BJC-1000 Service Manual

Part 4: Technical Reference
3.2 BJ Cartridge

3.2.1 Black BJ cartridge structure

The black BJ cartridge has a printing head equipped with 64 nozzles. The printing
head and ink cartridge are built-in.
1) Side cover
This plastic cover is fixed to the cartridge body to prevent ink leaking from the ink
sponge.
2) Ink sponge
This sponge is soaked with black ink. It is compressed and stored in the cartridge
body.
3) Cartridge body
This is a plastic case which links the ink sponge with the bubble jet head unit via
the ink filter.
4) Air Hole with Pressure Regulation Cap
As the ink is consumed, the pressure inside the cartridge decreases compared to the
atmospheric pressure. This makes it more difficult for the ink to be supplied to the
head. To prevent this, the ink cartridge has an air intake for maintaining a constant
pressure inside the cartridge body.
5) Bubble jet head unit
As dictated by the printing signals received through the signal contact, ink is ejected
through the 64 bubble jet nozzles.
6) Head cover
The plastic head cover protects the bubble jet head unit.
Side Cover
Ink Sponge
Head Joint Hole
Joint Pipe with Meshed Ink Filter
64 Bubble Jet Nozzles
Faceplate
Figure 4-7 Black BJ Cartridge Structure
4-10
Cartridge Body
Label
Air Hole with Pressure Regulation Cap
Bubble Jet Head Unit
Signal Contacts
Head Cover
BJC-1000