Droplet charge condition detection in an ink jet system printer

Details Droplet charge condition detection in an ink jet system printer Droplet charge condition detection in an ink jet system printer

1981-04-29

1983-02-08

Hartary, Joseph W.

Recorders

Record receiver deforming

G01D 1800

Patent

active

043731643

ABSTRACT:
A charge condition detection system is provided in an ink jet system printer of the charge amplitude controlling type in order to synchronize the application of the charging signal with the droplet formation timing. The charge condition detection system includes a metal member physically connected to the ink liquid to be supplied to an ink droplet issuance unit, and a capacitor electrically connected to the metal member. When the ink droplet is properly charged, the charge amount corresponding to the charge carried by the ink droplet is accumulated on the capacitor. By measuring the voltage appearing across the capacitor, the charge condition of the ink droplet is detected.

REFERENCES:
patent: 3893126 (1975-07-01), Ascoli
patent: 3953860 (1976-04-01), Fujimoto
patent: 4288796 (1981-09-01), Aiba
patent: 4329695 (1982-05-01), Aiba

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