Patent Number: 6,310,635

Title: Device for determining a quantity of consumable product present in a reservoir and corresponding device for printing documents

Abstract: Determination of the quantity of consumable product, notably of ink, remaining in a reservoir. A capacitor (36) is formed on each side of the reservoir (24) and a resonant circuit including this capacitor is formed with a circuit forming a notional inductor (74), such as a gyrator, and another capacitor (68), the capacitor (36) being integrated into the circuit forming a notional inductor.

Inventors: Coudray; Pascal (La Chapelle des Fougeretz, FR), Froger; Marie-Helene (Chateaugiron, FR), Lorgeoux; Mickael (Rennes, FR)

Assignee: Canon Kabushiki Kaisha

International Classification: B41J 2/175 (20060101); G01D 5/24 (20060101); G01F 23/26 (20060101); G01D 5/12 (20060101); G01F 23/22 (20060101); B41J 002/195 ()

Expiration Date: 10/30/2018