Ink jet head with testing resistors

Details Ink jet head with testing resistors Ink jet head with testing resistors

1990-12-31

1992-11-17

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

29593, 324537, 346 11, B41J 205

Patent

active

051647478

ABSTRACT:
An ink jet head is provided with testing or inspection to facilitate efficient testing of the circuitry to determine whether any short-circuit or open circuits exist.
The ink jet head includes plural ejection outlets for ejecting ink; a corresponding number of heat generating resistors disposed corresponding to the ejection outlets; heat generating resistors corresponding to the ejection outlets; electrodes connected to the respective heat generating resistors. The inspection resistors connect adjacent electrodes to permit inspection of electric connections.

REFERENCES:
patent: 2493524 (1950-01-01), Bruns
patent: 3345262 (1982-08-01), Shirato et al.
patent: 4313124 (1982-01-01), Hara
patent: 4459600 (1984-07-01), Sato et al.
patent: 4463359 (1984-07-01), Ayata et al.
patent: 4558333 (1985-12-01), Sugitani et al.
patent: 4723129 (1988-02-01), Endo et al.
patent: 4740796 (1988-04-01), Endo et al.
patent: 4835466 (1989-05-01), Maly
patent: 4996487 (1991-02-01), McSparran

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