Ink jet purging arrangement
US5557305A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1994 |
| Grant date | Sep 17, 1996 |
| Priority date | — |
| Expiry date | Feb 24, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/17593
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink jet head has a reservoir containing hot melt ink and an orifice plate with orifices, along with passages leading from the reservoir to the orifices to conduct ink thereto. The ink jet head includes a heater to melt the ink in the reservoir, along with a further heater to heat air in the airspace above the ink in the reservoir, and the reservoir has a sealable vent which is sealed by a sealing element at a maintenance station so that heating of the air increases the pressure in the reservoir to cause purging, an absorbent member being provided at the maintenance station adjacent to the orifice plate to trap ink ejected during purging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.