Axial droplet aspirator
US4097872A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1976 |
| Grant date | Jun 27, 1978 |
| Priority date | — |
| Expiry date | Dec 20, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
There is described a droplet aspirator for an ink jet printer. The aspirator includes a housing having a tunnel therein, which is spaced from an ink jet nozzle which emits an ink jet stream which passes through the tunnel. A gas stream is also directed through the tunnel at substantially the same velocity as the ink jet stream for reducing the aerodynamic effects on adjacent ink droplets. The tunnels cross-sectional area is substantially constant from one plane to the next when measured in any given plane transverse to the longitudinal axis, for maintaining the velocity of the gas stream constant. The tunnel has a circular cross-section when used in a nozzle per spot system, and when used in an analog deflected system, has an entrance of one geometry, with the tunnel changing in geometry along its longitudinal axis to a different geometry at its exit. Preferably, in the analog deflected system, the entrance geometry is circular and the exit geometry is elliptical or rectangular.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.