Apparatus for refilling ink cartridges
US5621445A · kind A · utility
115Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1994 |
| Grant date | Apr 15, 1997 |
| Priority date | — |
| Expiry date | Oct 13, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/17586
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention generally relates to refillable ink cartridges for computer controlled ink jet printers and, more specifically, to apparatus for refilling collapsible ink bags which are maintained at sub-atmospheric pressure within such equipment. The refilling apparatus includes a fluid bridge located between the reservoir holding replenishment ink and the ink cartridge. The fluid bridge may contain either a purge valve and/or a priming valve that prevent air bubbles from being introduced into the ink bag and from obstructing the flow of replenishment ink.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.