Phase shifts for two groups of nozzles
US8104878B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2009 |
| Grant date | Jan 31, 2012 |
| Priority date | — |
| Expiry date | Aug 3, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/031
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method includes forming drops of first size by applying drop-forming pulses during unit time period, τ0; forming drops of second size by applying drop-forming pulses during second size drop time period, τm, wherein the second sized drop time period is a multiple, m, of the unit time period, τm=m*τ0, and m≧2; providing timing between drops for printing consecutive pixels is equal to τi=a*τ0 where a is an integer ≧m and is a function of print media speed; forming the corresponding plurality of drop forming pulse sequences so as to form non-print drops and print drops according to the liquid pattern data; delaying the timing of the drop forming pulses sent to the transducers of the second group relative to the drop forming pulses sent to the transducers of the first group by a delay time τL which is approximately equal to τi/2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.