Device and method for measuring ink levels in a container
US7959245B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2007 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | Jun 26, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/2927
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ink level sensing device and associated method. The ink level sensing device includes a near infrared illumination source that emits near infrared light, and a container configured to accommodate a supply of ink containing light absorption material. The device further includes a protruding chamber adjacent to the container. The protruding chamber is configured to accommodate a portion of the supply of ink accommodated by the container. The device also includes a sensor that is configured to receive a signal based on an amount of the light that passes through the protruding chamber. The method includes emitting a light from a near infrared illumination source and directing the light toward a protruding chamber of the ink supply. The method further includes sensing an amount of the light that passes through the protruding chamber in the ink supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.