Ink jet printing apparatus and method using a pressure generating device to induce surface waves in an ink meniscus
US6450615B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1998 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Feb 19, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/11
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Characteristics of a droplet ejection apparatus are change depending on the shape or cone angle of the main ink ejection chamber of the apparatus, or on the diameter of the ejection aperture of main ink ejection chamber. Accordingly, operation of the droplet ejection apparatus varies with the shape, angle, or diameter of main ink ejection chamber. The shape of the aperture according to the present invention is circular or regular polygonal so that surface waves are synthesized at the central portion of the ejection aperture. Moreover, the cone angle of the main chamber is set to 65° or less from the plane vertical to the droplet ejecting direction and the diameter of the ejection aperture is set to a value 1.25 times or more larger than a desired droplet diameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.