Hewlett-packard Development Company, L.P.

Steve Steinfield

Ronald Albert Askeland

Wayne Richard

David Keller

Winthrop D Childers

Antoni S Murcia

Kenneth J Courian

Mohammad M Samii

Mark Andreas Van Veen

Scott W Hock

David L Berardelli

Victor T Escobedo

Myron A Bezenek

Juan Carles Vives

Mohammad M Samli

James Kelley

A fluid ejection device includes a die having a plurality of nozzles variously configured according to a predetermined intended distribution. The fluid ejection device also includes a controller configured to set a mean drop volume of the die by selectively firing selected nozzles of the die.

Nozzle distribution

A mixing apparatus that includes a drop on demand fluid dispenser for adding an additive fluid to a receiver liquid to produce a composite liquid that includes the receiver liquid and the additive fluid.

Mixing apparatus

A fluid-ejection assembly of one embodiment is disclosed comprising first and second arrays of fluid-ejection mechanisms, first and second service stations, and first and second drive mechanisms. The first array ejects fluid onto media; the first service station is to service the first array. The second array ejects fluid onto the media; the second service station is to service the second array. The first drive mechanism moves the first array between a first position to eject fluid onto the media and a second position at the first service station, while the second array ejects fluid onto the media in place of the first array. The second drive mechanism moves the second array between a third position to eject fluid onto the media and a fourth position at the second service station while the first array ejects fluid onto the media in place of the second array.

Fluid-ejection assembly

A method of an embodiment of the invention is disclosed that outputs a first color calibration target using a first color printing technology onto media that has a second color calibration target already output thereon using a second color printing technology. The color differences between the first and the second color calibration targets are determined. The first color printing technology is calibrated, based on the color differences between the first and the second color calibration targets.

Calibrating a first color printing technology based on color differences with a second color printing technology

Growing community of inventors

San Diego, CA, United States of America

Steve Steinfield