Operation of droplet deposition apparatus
US6281913A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1999 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Nov 15, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/2128
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of operating an inkjet printhead for printing on a substrate, the printhead having an array of channels; a series of nozzles which communicate respectively with said channels for ejection of droplets therefrom; connection means for connecting the channels with a source of ink; and electrically actuable means associated with each channel and actuable a plurality of times in accordance with print tone data, thereby to eject a corresponding number of droplets to form a printed dot of appropriate tone on the substrate, the method comprising the steps of: applying one or a plurality of electrical signals to the electrically actuable means associated with a channel in accordance with the print tone data, the duration of each signal being chosen such that the velocity of the corresponding ejected droplet is substantially independent of (a) whether or not channels in the vicinity of said selected channel are similarly actuated to effect drop ejection simultaneously with drop ejection from said selected channel, and (b) the number of droplets to be ejected in accordance with the print tone data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.