Ink jet printer

Details Ink jet printer Ink jet printer

1997-05-07

2000-07-04

Barlow, John

Incremental printing of symbolic information

Ink jet

Controller

B41J 2195

Patent

active

060846054

ABSTRACT:
An ink jet printer has ink pressure chambers defined by opposed walls formed of a piezoelectric material. The walls distorts in shear mode to eject ink drops from the ink pressure chambers when voltages are applied to the walls in accordance with print data. A row of ink pressure chambers eject ink drops through orifices during printing operation. A second ink pressure chamber is in communication with the other ink pressure chambers. An ink-state detector provides a voltage to the second ink pressure chamber to measure the impedance of the ink between the walls of the second ink pressure chamber. The impedance reflects the remaining amount of remaining ink.

REFERENCES:
patent: 4293867 (1981-10-01), Isayama
patent: 4625220 (1986-11-01), Nagashima
patent: 4695852 (1987-09-01), Scardovi
patent: 5241189 (1993-08-01), Vandagriff et al.
patent: 5414452 (1995-05-01), Accantino et al.
patent: 5432540 (1995-07-01), Hiraishi
patent: 5677718 (1997-10-01), Crawford et al.

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