Method and device for determining the quantity of product present in a reservoir, notably that of ink present in an image forming device
US6254212A · kind A · utility
16Cited by
9References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1997 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Jul 2, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/268
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device determines a quantity of product present in a reservoir, particularly a quantity of ink in the reservoir (112) of an image forming device, such as a printer (10). The device includes an electrode (120) disposed in contact with the product in the reservoir, a circuit (117) for supplying the electrode with an excitation signal (SE) causing an electromagnetic signal radiated by the product, a receiving antenna (116) for sensing the electromagnetic signal, and a circuit (115) for processing the electromagnetic signal sensed into a signal representing the quantity of product present in the reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.