Ink level sensor and method of use
US7556326B2 · kind B2 · utility
11Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2005 |
| Grant date | Jul 7, 2009 |
| Priority date | — |
| Expiry date | Sep 26, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ink level sensing system and method of sensing that includes a lower probe positioned in a lower portion of an ink reservoir, an upper probe positioned above the lower probe and extending upward to an upper portion of the ink reservoir, and an electrode positioned next to the lower and upper probes. An electrical signal is driven to the electrode and current flows are detected from the electrode to the lower and upper probes. The current flows to the lower and upper probes are compared to determine a level of ink in the ink reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.