Ink jet printer capable of detecting lack of ink

Details Ink jet printer capable of detecting lack of ink Ink jet printer capable of detecting lack of ink

1995-03-23

1996-11-05

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Controller

347 19, 347 44, B41J 2195

Patent

active

055722415

ABSTRACT:
An ink jet printer having an ink tank and nozzle passages for jetting ink therefrom. A through hole communicates with the ink tank and has a diameter which is sufficiently greater than the diameter of the nozzle passages so that air is introduced in the through hole when the pressure in the ink tank becomes negative due to a lack of ink therein and when the nozzle passages are still filled with ink. The air introduced into the through hole is detected so as to indicate a lack of ink in the ink tank.

REFERENCES:
patent: 3708798 (1973-01-01), Hildenbrand et al.
patent: 4910529 (1990-03-01), Regnault
patent: 5051759 (1991-09-01), Karita et al.
Patent Abstracts of Japan Publication No. JP5008407, Publication Date: Jan. 19, 1993.
Vol. 11 No. 250 (M-616) (2697) Aug. 14, 1987.
Vol. 12 No. 424 (M-761) (3271) Nov. 10, 1988.
"Partioned Drop-On-Demand Generator", IBM Technical Disclosure Bulletin, vol. 26 No. 9, Feb. 1984.

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