Method and device for monitoring the consumption of a product, s

Details Method and device for monitoring the consumption of a product, s Method and device for monitoring the consumption of a product, s

1998-06-25

2000-07-18

Smith, Matthew S.

Incremental printing of symbolic information

Ink jet

Controller

399 27, 73304C, B41J 2195, G03G 1500

Patent

active

060896884

ABSTRACT:
In order to monitor the consumption of a normally electrically conductive product contained in a reservoir made of electrically insulating material, a measurement procedure is defined according to which there is taken off a measurement signal in response to an excitation signal applied to a storage cavity in this reservoir, this signal being such that a characteristic, such as the voltage, of the measurement signal varies substantially with the quantity of product contained in the cavity, and with a utilisation parameter of this product. A procedure for determining this utilisation parameter and a processing procedure giving an item of information on the quantity of product remaining in the reservoir as a function not only of the said characteristic but also of the instantaneous value of the utilisation parameter, are also defined. In the field of printing, this parameter can be the density of printing of the printed pages, or the temperature.

REFERENCES:
patent: 4788861 (1988-12-01), Lichti
patent: 5198860 (1993-03-01), Yamanaka et al.
patent: 5465619 (1995-11-01), Sotack et al.
patent: 5682184 (1997-10-01), Stephany et al.
patent: 5802419 (1998-09-01), Sakurai et al.
patent: 5923917 (1999-07-01), Sakurai et al.
patent: 5946522 (1999-08-01), Inami

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