1
Steve O Rasmussen, Paul D Gast: Large inkjet print swath media support system. Hewlett Packard Company, Flory L Martin, November 30, 1999: US05992994 (188 worldwide citation)

To maintain a uniform spacing between the print media, such as paper, and an inkjet printhead having a large print swath, for instance about 25 millimeters (one inch) wide, a new media support system is provided for inkjet printing mechanisms, such as printers or plotters. The support system employs ...


2
Paul D Gast, Walter Uebelacker, J P Harmon: Method and apparatus for cleaning ink-jet printheads. Hewlett Packard Company, April 7, 1992: US05103244 (114 worldwide citation)

A method and apparatus for cleaning the orifice plates of multiple printheads of an ink-jet printer. The apparatus includes a multi-blade wiper which is indexed automatically to permit each printhead to be wiped in sequence by a selected blade. The desired cleaning is produced by dragging a printhea ...


3
Paul D Gast, James L McCullough, Albert Serra, Xavier Gros, Jose J Doval, Stefano Schiaffino, Ronald A Askeland, Clayton L Holstun, Scott Norum: Alignment of ink dots in an inkjet printer. Hewlett Packard Company, Brian D Ogonowsky, Skjerven Morrill MacPherson, April 9, 2002: US06367903 (96 worldwide citation)

A misalignment compensation technique for a dot printer is disclosed. This technique first supplies printing instructions to a printhead for energizing printing elements in various groups (primitives) to print a pattern on a medium. The printed pattern is then detected by optical sensors in the prin ...


4
Paul D Gast, Alan Shibata, James O Beehler, Thomas A Pearo: Printhead servicing station for printers. Hewlett Packard Company, October 3, 1995: US05455609 (52 worldwide citation)

Methogology and apparatus are described which employ an improved modular service station design wherein a printhead-servicing sled is selectively vertically driven to effect execution of servicing tasks. In keeping with its desired modularity, the sled is made readily removable using an improved cla ...


5
Norman E Pawlowski Jr, Mark Hauck, Bruce Cowger, Steven B Elgee, Paul D Gast: Ink level detection in a pressure regulated pen. Hewlett Packard Company, December 10, 1996: US05583545 (48 worldwide citation)

The present invention relates to Ink Level Detection in a Pressure Regulated Pen. A liquid level detector for a liquid containment device, such as an ink-jet pen, provides a signal indicative of a lowering level of liquid in the containment device. In exemplary embodiments, a refillable or replaceab ...


6
Winthrop D Childers, Michael L Bullock, Bruce Cowger, John A Underwood, Susan M Hmelar, James E Clark, Paul D Gast, John A Barinaga, David O Merrill: Ink container having electronic and mechanical features enabling plug compatibility between multiple supply sizes. Hewlett Packard Company, Winthrop D Childers, Kevin B Sillivan, September 21, 1999: US05956057 (42 worldwide citation)

The present invention is an ink container for use in an ink jet printing system. The printing system has a printhead under control of printing system electronics and an ink container receiving station for providing ink to the printhead. The replaceable ink container includes a plurality of container ...


7
Bruce Cowger, Ronald W Hall, Paul D Gast, Alan Shibata: Ink delivery system for a printer. Hewlett Packard Company, May 12, 1998: US05751300 (30 worldwide citation)

In a method and system for delivering ink within a printer, a reservoir and a portion of a tube are accelerated so as to generate an inertial flow of ink in the tube, where the tube is connected to the reservoir and in fluid communication with an ink supply. A valve is provided between the tube and ...


8
Paul D Gast, Eva Maria Moon, Steven B Elgee: Drop count-based ink-jet pen servicing method. Hewlett Packard Company, December 10, 1996: US05583547 (23 worldwide citation)

Automatic print rate-controlling and pen-servicing method and apparatus are described for power management and for determining appropriate servicing intervals for plural-pen ink-jet printers. The preferred method involves counting the number of drops of ink that are fired from each of plural pens in ...


9
Paul D Gast, Alan Shibata, Eva Maria Moon: Synchronized carriage and wiper motion method and apparatus for ink-jet printers. Hewlett Packard Company, March 7, 1995: US05396277 (19 worldwide citation)

A synchronized wiper and pen motion solution for ink-jet printers is described. The invented method and apparatus synchronize the motion of the pen and wiper throughout the wipe stroke, and provide for controlled, simultaneous movement therebetween that avoids pole vaulting, excess interference and ...


10
Norman E Pawlowski Jr, Paul D Gast: Off-axis ink supply with pressurized ink tube for preventing air ingestion. Hewlett Packard Company, November 23, 1999: US05988802 (17 worldwide citation)

In the preferred embodiment, an inkjet printer includes a replaceable print cartridge which is inserted into a scanning carriage. The print cartridge contains a regulator valve. An ink tube extends from the scanning carriage to a separate, disposable ink supply cartridge located within the printer. ...



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