Hewlett-packard Development Company, L.p.

Hewlett-packard Company

Hewlett-packard Corporation

Donald B Ouchida

Bruce Cowger

Robert R Beeson

Robert Matthew Sesek

Steve Orrin Rasmussen

Paul H McClelland

Daniel D Dowell

William R Wagner

John Liebeskind

Ronald W Hall

Lawrence R Plotkin

Kevin J Urlaub

David A Bradley, Jr

Daniel L Briley

Daniel S Kuehler

Roger W Squire

Clay C Higgins

A fluid ejection cartridge for a fluid ejection device includes a print head, having a plurality of fluid ejection nozzles, a fluid reservoir, configured to hold a fluid to be ejected from the print head, and a selectively breachable isolator mechanism, separating the fluid reservoir and the print head.

Fluid ejection cartridge

A print cartridge identification system includes a housing, a family key provided on one side of the housing to identify an associated printer of the print cartridge, a fluid key provided on the one side of the housing to identify a property of fluid in the print cartridge, and a location datum provided on the one side of the housing to position the print cartridge in the associated printer.

Print cartridge identification system and method

A postage meter indicia verification apparatus and method includes, in a postage meter system for printing postage indicia, a postage meter device with a print head for printing postage indicia on media. A sensor is connected to the postage meter device for determining the presence of postage indicia printed on the media by the print head. A control device is connected to the postage meter device for controlling the operation of the postage meter device in accordance with the results of the sensor determination.

Postage meter indicia verification apparatus and method

Disclosed is a printing system having a plurality of print heads for printing an image on a print receiving medium, print head actuators operable for individually repositioning the print heads to optimal locations for each print job, and software operable while a current print job is active for determining the optimal print head locations for a next anticipated print job.

System and method for positioning print heads based on print job

A print head assembly that is removably mounted to a carriage. The print head assembly fits within a socket defined by the carriage. Exposed electrical leads in the socket and the print head assembly body are brought into contact when the assembly is inserted into the carriage socket.

Unit print head assembly for an ink-jet printer

An ink delivery system for an ink-jet pen having a print head with ink nozzles and a cartridge with an internal reservoir divided into a capillary material filled volume and a free standpipe volume. The print head is mounted on the cartridge adjacent the standpipe volume. The ink delivery system further includes a circulation conduit removably connected to the standpipe volume and the capillary material filled volume to permit fluid flow from the standpipe volume to the capillary material filled volume. A supply conduit connects an ink supply to the circulation conduit. A pump connected to the circulation conduit pumps ink from the ink supply through the circulation conduit to the capillary material filled volume. The pump further operates to pump fluid from the standpipe volume through the circulation conduit and to the capillary material-filled volume thereby filling the cartridge with ink, removing gas bubbles from the cartridge, priming the print head nozzles, and dissipating heat generated by the print head.

Ink delivery system for ink-jet pens

Ink-jet pens having multiple print heads are manufactured with readily replaceable unit print head assemblies that facilitate testing of print head performance prior to complete assembly of the pen.

Unit print head assembly for ink-jet printing

A method is provided for assembling thermal ink-jet printheads. The method comprises: (a) providing a circuit layout comprising a first substrate, a plurality of conductive traces thereon in a pre-selected pattern, and a plurality of openings through the substrate defining ink-jet nozzles; (b) providing a die layout comprising (1) a plurality of resistors, each resistor formed on a second substrate and matched to an opening and (2) a plurality of channels formed in a barrier material and matched to a portion of the plurality of conductive traces; (c) interlocking plurality of conductive traces with the plurality of channels to align each resistor with a respective one of the openings; and (d) laminating those portions of the first substrate that contact the barrier to the barrier so as to bond the two layouts together. In one embodiment, the resistors are each formed in a well defined in a layer of the barrier material already on the substrate, which is extended to encompass the resistors. In a second embodiment, the barrier material is omitted, and the resistors are simply formed on the substrate. In either case, the barrier material comprises a photopolymerizable material and each resistor matched to a nozzle forms a firing chamber. The advantage of the invention over what has been done before is the ability to utilize photodefinable features on the two primary components so as to provide both performance and cost advantages.

Growing community of inventors

Corvallis, OR, United States of America

Donald B Ouchida