Patent Number: 6,254,213

Title: Ink droplet ejecting method and apparatus

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.

Inventors: Ishikawa; Hiroyuki (Nisshin, JP)

Assignee: Brother Kogyo Kabushiki Kaisha

International Classification: B41J 2/045 (20060101); B41J 029/38 (); B41J 002/045 ()

Expiration Date: 07/03/2018