Apparatus for measuring the amount of ink remaining in an ink tank
US6641240B2 · kind B2 · utility
57Cited by
2References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2002 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Feb 28, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/17566
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for measuring the amount of ink remaining in an ink tank using a sensing module and a detecting circuit is disclosed. The sensing module comprises a fixed device connected to the casing of the ink tank and a movable device connected to the bag. As the ink is ejected, the volume of the bag increases so that the movable device moves along with the bag. The detecting circuit, coupled with the sensing module, generates a corresponding detecting signal according to the variation in the relative position of the movable device and the fixed device, and the measurement of the ink amount is thus obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.