Method and device for determining a quantity of consumable product present in a reservoir and a document printing device implementing this method
US6247363A · kind A · utility
2Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1998 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Mar 24, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/268
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Determination of the quantity of consumable product present in a reservoir, for example the quantity of ink present in the reservoir of an inkjet printing device. According to the invention, the movable reservoir can be engaged in the dielectric space of a capacitor consisting of two plates, a signal generator applies a signal to the capacitor and the reservoir is moved, a comparator changes state when a threshold is reached and the distance travelled by the reservoir makes it possible to determine the quantity of product situated therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.