Multipulsing method for operating an ink jet apparatus for printing at high transport speeds
US4686539A · kind A · utility
Inventors
Key dates
| Filing date | Jun 6, 1986 |
| Grant date | Aug 11, 1987 |
| Priority date | — |
| Expiry date | Jun 6, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for both reducing the ligament length and satellite droplet problems associated with producing high velocity ink droplets from an ink jet head printing at relatively high ink jet head transport speeds, comprises driving the ink jet head with a composite waveform including independent and successive first, second, and third electrical pulses, each having an exponential leading edge and a step-like trailing edge, the pulses being constructed to have amplitudes, pulse widths, and dead times between pulses, for causing the ink jet head to eject three successive ink droplets, each of increased velocity relative to the preceding droplet, for causing the droplets to merge in flight fo form a single or ultimate droplet having a predetermined velocity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.