Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1996-03-07
1998-12-15
Hartary, Joseph
Incremental printing of symbolic information
Ink jet
Ejector mechanism
257378, 438202, 438376, 347209, B41J 205
Patent
active
058502424
ABSTRACT:
The occupied area of a heater drive circuit of a recording head is reduced, and the number of manufacturing steps is decreased. As a circuitry of the heater drive unit, the final stage of the drive unit is constituted of a pnp or npn bipolar transistor, the heater, which is a load, is connected to the emitter side, and the collectors of each transistor are connected commonly to the base itself and grounded. The prestage of the drive unit is formed of the prestage of a MOS type element whose polarities are reversed to those of the final stage, i.e., an n-type MOS transistor with respect to the final stage of a pnp bipolar transistor and a p-type MOS transistor with respect to the final stage of a npn bipolar transistor, and the source of the prestage is grounded.
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Canon Kabushiki Kaisha
Hartary Joseph
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