Method and apparatus for synchronizing charging of droplets of a pressurized conductive liquid stream
US4150384A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1977 |
| Grant date | Apr 17, 1979 |
| Priority date | — |
| Expiry date | Oct 17, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/115
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The application of the voltage on a charge electrode to selectively charge droplets of a pressurized conductive ink stream is synchronized with the break off of the droplets from the stream so that the break off occurs in the third quarter of the time period during which the charge voltage is placed on the charge electrode. To determine in which quarter that break off is occurring, the charge voltage is placed on the charge electrode at the same time for two adjacent quarters of a cycle during each of the two adjacent cycles in which a disturbance is placed on the stream by drive means such as a transducer, for example, to produce two droplets. During the next application of the charge voltage on the charge electrode, the charge voltage is applied for the last of the prior two adjacent quarters and the next adjacent quarter during two adjacent droplet producing cycles. During the third application of the charge voltage on a charge electrode, the voltage is placed on the charge electrode for the last of the prior two adjacent quarters of the second application and the next adjacent quarter during each of two adjacent droplet producing cycles. The final periodic application results i…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.