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The monochrome ink jet print head is made up of an interchangeable resin shell
containing 50 print nozzles and an electrical circuitry with 50 resistive heating
elements (see figure 2-1a).
The nozzles are assembled on a nickel and gold compound referred to as being
electroformatted, and have a conical shape as shown in figure 2-1b.
The ink is contained in a disposable cartridge mounted inside the shell hosting
the nozzles. The ink flows to the nozzles through small channels in the print
head's resin layer. This layer is electrically insulated from the resistive heating
elements.
A sponge inside the cartridge prevents the ink from being shaken during print
head movements. This avoids problems during carriage translations, avoids the
ink from leaking out of the bleedholes and the forming of froth.
Each resistive heating element corresponds to a nozzle and is connected to the
head's external electric contacts.
S-2.PM5
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11/7/94, 13:39
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