Ink droplet ejecting method and apparatus
US6254213A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1998 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Nov 30, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In an ink drop let jetting method and an apparatus therefor, by setting a printing frequency used when continuous dots are printed to a predetermined value, a stable jetting becomes possible, and jetting speeds and volumes of second ink droplets and subsequent droplets may be prevented from being fluctuated. A frequency of a jet pulse signal applied to an actuator in accordance with a printing command of a plurality of consecutive dots is set to be a reciprocal of the product of a sum (integer +0.5) and the time T in which a pressure wave propagates within an ink chamber in one propagation direction. Thus, it is possible to prevent speeds and volumes of the second ink droplets and subsequent ink droplets from being fluctuated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.