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RECORDING SECTION
4.13 BJ Cartridge
4.13.1 Structure of bj cartridge
Fig. 4-65 shows the structure of the BJ cartridge.
• Cartridge cover
This plastic cover is bonded to the cartridge body to prevent ink leakage
from inside the cartridge. As ink is consumed, the pressure inside the car-
tridge body falls below atmospheric pressure, and supply of ink to the head
is prevented. The ventilation holes on the cartridge cover maintain the
inside of the cartridge body at a fixed pressure to prevent this phenomenon.
• Ink sponge
This sponge is soaked with ink, and is contained inside the cartridge body
in a compressed state.
• Cartridge body
This plastic case couples the BJ print head unit to the ink sponge.
4–58
Ink sponge
Ink filter
Cartridge body
Joint pipe
BJ nozzle
Face plate
Fig. 4-65 Structure of BJ Cartridge
Cartridge cover
Ventilation holes
Aluminum plate
Signal contact pad
BJ print head unit
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