Phase shifts for printing at two speeds
US8231207B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2009 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | Feb 4, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/033
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The method includes forming first size drops by applying drop forming pulses during a unit time period τ0; forming second size drops by applying drop forming pulses during a second size drop time period, τm, which is a multiple, m, of the unit time period; forming the corresponding plurality of drop forming energy pulse sequences so as to form non-print drops and print drops; delaying the timing of the drop forming energy pulses sent to the transducers of the second group relative to the drop forming energy pulses sent to the transducers of the first group by a delay time τL, characterized by τL being equal to d*τ0 where d is 1½ to 9½, when printing at a first speed and τL is approximately equal to f*τ0 times where f is 1½ to 9½, f is greater than d when printing at a speed slower than the first speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.