Carriage Unit
J007/J010/J011 6-8 SM
Plastic bellows. A spring forces out the flexible, thin plastic film on the left side of the
ink tank.
Ink level lever. When the ink tank is mounted in the printer, this lever pushes the
bellows down to increase pressure in the ink reservoir. The ink level sensor mounted
on the carriage detects the position of these arms to determine the amount of ink
remaining in a tank. (The actuator spreads outward when the bellows gradually
collapses as ink is consumed.)
Air release valve. Purges air periodically to keep the ink inside the ink tank unit under
the prescribed pressure and the amount of air in the tank low.
The basic operation of the print head tank is identical in both printer models. However, the
configuration of the tanks is slightly different.
On the J007/J010 there are two combined units.
Two print head tanks are mounted on one print head.
Each print head tank unit feeds to its own nozzle array and (one for each color.
Each print head tank holds 4.3 ml of ink.
On the J011 there are four independent units.
Each print head tank has an independent print head with a nozzle array.
Each print head tank holds 4.6 ml of ink.
6.3.4 INK EJECTION DEVICE
Each print head uses a piezo-electric element (PZT) . This forces ink from the ink
reservoirs out of the ink nozzles and onto the paper.
This is done with pressure. At the prescribed time, an electric charge is applied to the PZT.
This makes the PZT expand. The expansion of the PZT puts pressure on the ink below.
This makes the ink move in both directions. The ink on the right is forced out the ejection
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