Ink near-end detecting device

Details Ink near-end detecting device Ink near-end detecting device

1991-08-07

1993-10-19

Fuller, Benjamin R.

Recorders

Markers and/or driving means therefor

With ink supply to marker

73304R, 101364, B41J 2175, G01D 1800

Patent

active

052550192

ABSTRACT:
In an ink near-end detecting device, a pair of electrodes are arranged in the porous material in the ink tank and in the ink pool provided below the ink tank, respectively, so that the time instant the ink in the porous material has been nearly used up is detected from the variation of the electrical resistance between the electrodes with the consumption of the ink in the porous material.

REFERENCES:
patent: 4202267 (1980-05-01), Heinzl et al.
patent: 4511906 (1985-04-01), Hara
patent: 4626874 (1986-12-01), Murai et al.
patent: 4782754 (1988-11-01), Pohlig
patent: 4788861 (1988-12-01), Lichti
patent: 4977413 (1990-12-01), Yamanaka et al.
patent: 5051759 (1991-09-01), Karita et al.
patent: 5070346 (1991-12-01), Mochizuki et al.
"Plotter Print Module" IBM Technical Disclosure Bulletin, vol. 32, No. 2, Jul. 1989, p. 439.

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