Air vent for an ink supply cartridge in a thermal ink-jet printer
US5289212A · kind A · utility
51Cited by
10References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 19, 1992 |
| Grant date | Feb 22, 1994 |
| Priority date | — |
| Expiry date | May 19, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/175
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A cartridge for supplying liquid ink to a thermal ink-jet printing apparatus includes a chamber having a ventilation port and an outlet port. A medium occupies at least a portion of the chamber, for retaining liquid ink therein at a predetermined back pressure. An open-ended conduit defines a passageway extending from the ventilation port to a portion of the chamber substantially devoid of liquid ink, to prevent leakage of liquid ink from the cartridge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.