1
Alan R Arthur, Robert R Beeson: Printhead having memory element. Hewlett Packard Company, September 17, 1991: US05049898 (376 worldwide citation)

A disposable printing assembly includes a memory element in which data characterizing the assembly can be stored. This data can characterize the identity of the assembly, or one or more of its operational characteristics. Such operational characteristics for an illustrative ink jet printhead assembl ...


2
Bruce Cowger, Donald B Ouchida, Robert R Beeson: Unit print head assembly for ink-jet printing. Hewlett Packard Company, October 15, 1996: US05565900 (238 worldwide citation)

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.


3
Jeffrey A Thoman, David W Swanson, Mindy A Hamlin, Robert R Beeson: Datum formation for improved alignment of multiple nozzle members in a printer. Hewlett Packard Company, April 25, 1995: US05408746 (141 worldwide citation)

Precise alignment between two or more nozzle plates affixed to print cartridges installed in a single carriage of an ink printer is achieved by machining datum projections on each print cartridge after its nozzle plate has been permanently secured to the print cartridge. The machined datum projectio ...


4
Bruce Cowger, Robert R Beeson, Christopher A Schantz, William J West: Back pressure control in ink-jet printing. Hewlett Packard Company, July 8, 1997: US05646666 (33 worldwide citation)

The system for controlling the back pressure in the reservoir of an ink-jet pen includes a pump for removing air from the reservoir and a vacuum regulator to ensure that the back pressure within the reservoir does not exceed a level that would cause the print head to fail.


5
Robert R Beeson: Inkjet page-wide-array printhead cleaning method and apparatus. Hewlett Packard Company, December 31, 1996: US05589865 (25 worldwide citation)

A cleaning media is fed adjacent to a page-wide-array ("PWA") printhead along a paper path. The cleaning media includes a solvent pad and an absorbent pad coupled to a backing material. The backing material defines an opening along a substantial width of the material and has size dimensions approxim ...


6
Robert R Beeson: Controlled heating of solid ink in ink-jet printing. Hewlett Packard Company, April 15, 1997: US05621444 (23 worldwide citation)

The solid ink in an ink-jet printer is melted and solidified in a manner that directs gasses in the ink to a location where those gasses may be collected and removed. Also provided is a corrugated heater that is disposed within the ink to melt the ink without interfering with the gas removal process ...


7
Jeffrey A Thoman, David W Swanson, Mindy A Hamlin, Robert R Beeson, Corrina Hall, James G Salter, W Wistar Rhoads: Alignment of multiple nozzle members in a printer. Hewlett Packard Company, April 1, 1997: US05617128 (18 worldwide citation)

Precise alignment between two or more nozzle plates affixed to print cartridges installed in a single carriage of an ink printer is achieved by machining datum projections on each print cartridge after its nozzle plate has been permanently secured to the print cartridge. The machined datum projectio ...


8
Robert R Beeson, Paul H McClelland, Donald B Ouchida: Self aligning orifice construction for thermal ink-jet printheads. Hewlett Packard Corporation, February 14, 1995: US05388326 (10 worldwide citation)

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) provi ...


9
Lawrence R Plotkin, Bruce Cowger, Donald B Ouchida, Robert R Beeson: Unit print head assembly for an ink-jet printer. Hewlett Packard Company, October 23, 2001: US06305786 (8 worldwide citation)

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.


10
Bruce Cowger, Robert R Beeson, Fred E Tarver: Ink jet printer cartridge refilling method and apparatus. Hewlett Packard Company, April 21, 1998: US05742308 (7 worldwide citation)

An ink jet printer having a travelling ink jet pen with a foam-filled ink chamber. A separate source reservoir includes an ink outlet nozzle connectable to the pen chamber for refilling. A probe on the reservoir partially compresses the foam to decrease its ink capacity during filling. An electrical ...