Ink level sensing
US10378946B2 · kind B2 · utility
1Cited by
29References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2017 |
| Grant date | Aug 13, 2019 |
| Priority date | — |
| Expiry date | Feb 13, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/17579
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In some examples, a method of sensing an ink level includes applying a pre-charge voltage to a sense capacitor to charge the sense capacitor with a charge, sharing the charge between the sense capacitor and a reference capacitor, causing a reference voltage at a gate of an evaluation transistor, and determining a resistance from a drain to a source of the evaluation transistor that results from the reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.