Ink cartridge with separate magnets
US6623092B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2002 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Mar 29, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/17579
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink cartridge using separate magnets is provided. The ink cartridge includes an ink container, which includes first and second chambers separated by a vertical partition formed therewithin for containing ink, and a head for ejecting the ink in the ink container onto a printing medium in the form of droplets. The first chamber includes a sponge filling most of the inside of the first chamber, a filter provided on a bottom portion of the sponge, and an ink supply pipe for supplying the ink which has passed through the filter to the head. The second chamber includes a magnet float floating on the ink in the second chamber and including a first magnet in its inside, and a second magnet provided in the bottom surface of the second chamber. The ink cartridge includes a magnet sensor for detecting a magnetic flux having at least a predetermined level when the magnet float contacts the second magnet. Accordingly, the ink cartridge with separate magnets does not require a cartridge container to be formed of a transparent material. By using the separate magnets, a magnetic flux having a strength necessary for detection can be induced while preventing magnetic interference between ink cont…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.