Measuring apparatus for the ink-level in ink-jet printing unit
US5623291A · kind A · utility
26Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1994 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Dec 6, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/17566
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In an ink-jet printing unit comprising a printing head mounted on the container, a measuring circuit comprising a pair of electrodes which substantially enclose the volume of ink within the container, allows hysteresis- free linear mode measurement of variations in the ink volume within the container and the signalling of at least one of the ends of the variation interval to indicate the most suitable moment for recharging ink in the container by means of a cartridge inserted into the container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.