Masakazu Okuda

US Patent:

8393702, Mar 12, 2013

Filed:

Dec 10, 2009

Appl. No.:

12/635567

Inventors:

Christoph Menzel - New London NH, US
Masakazu Okuda - San Jose CA, US
Steven H. Barss - Wilmot Flat NH, US

Assignee:

FUJIFILM Corporation - Tokyo

International Classification:

B41J 2/01
B41J 2/045
B41J 2/05
B41J 2/055

US Classification:

347 11

Abstract:

A method for causing fluid to be ejected from a fluid chamber of a jet in a printhead. An actuator is actuated with a first energy imparting pulse to push fluid away from the actuator and toward a nozzle. Following a lapse of a first interval, the actuator is actuated with second energy imparting pulse to push fluid away from the actuator and toward the nozzle. Following a lapse of a second interval as measured from the second energy imparting pulse, the actuator is actuated with a break-off pulse to cause fluid extending out of an orifice of the nozzle to break off from fluid within the nozzle, wherein the second lapse is longer than the first lapse and is an inverse of the meniscus-jet mass frequency.

US Patent:

8403452, Mar 26, 2013

Filed:

Nov 16, 2011

Appl. No.:

13/297433

Inventors:

Christoph Menzel - New London NH, US
Masakazu Okuda - San Jose CA, US
Steven H. Barss - Wilmot Flat NH, US

Assignee:

FUJIFILM Corporation - Tokyo

International Classification:

B41J 29/393
B41J 29/38

US Classification:

347 19, 347 11

Abstract:

A method for causing fluid to be ejected from a fluid chamber of a jet in a printhead. An actuator is actuated with a first energy imparting pulse to push fluid away from the actuator and toward a nozzle. Following a lapse of a first interval, the actuator is actuated with second energy imparting pulse to push fluid away from the actuator and toward the nozzle. Following a lapse of a second interval as measured from the second energy imparting pulse, the actuator is actuated with a break-off pulse to cause fluid extending out of an orifice of the nozzle to break off from fluid within the nozzle, wherein the second lapse is longer than the first lapse and is an inverse of the meniscus-jet mass frequency.