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BJC-5000
3.2 BJ Cartridge
3.2.1 Black BJ cartridge structure
The black BJ cartridge has a 128-nozzle printhead. The printhead and ink cartridge
are assembled in a single cartridge body.
1) Cartridge cover
A plastic cover is attached to the cartridge body to prevent ink from leaking inside
the cartridge.
As the ink is consumed, the pressure inside the cartridge decreases relative to the
atmospheric pressure. This makes it harder for the ink to be supplied to the head.
To prevent this, the cartridge cover is provided with a pressure adjusting hole for
maintaining constant pressure inside the cartridge body.
2) Ink sponge
The sponge is soaked with black ink. It is compressed and stored in the cartridge
body.
3) Cartridge body
The plastic case connects the ink sponge with the bubble jet head unit via the ink
filter.
4) Bubble jet head unit
Ink is discharged through 128 bubble jet nozzles in accordance with the print
signals received through the signal contact.
Cartridge Body
128 Bubble Jet Nozzles
Ink Sponge
Ink Filter
Label
Joint Pipe
Faceplate
Bubble Jet Head Unit
Figure 4-12 Black BJ Cartridge Structure
Cartridge Cover
Pressure Adjusting Hole
Aluminum Plate
Signal Contact
4-17
Part 4: Technical Reference
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