1
Michael L Bullock, Winthrop D Childers, B Mark Hirst, Ronald D Stephens Jr, Antoni Gil Miquel: Replaceable part with integral memory for usage, calibration and other data. Hewlett Packard Company, Dennis G Stenstrom, December 16, 1997: US05699091 (193 worldwide citation)

A printer/copier apparatus is adapted to receive a replacement ink cartridge that is employed during the printing/copying operation. The apparatus includes a receptacle with a first connector that is coupled to a processor which controls operation of the apparatus. The cartridge includes a second co ...


2
Alexander Perumal Jr, Paul H Dillinger: Color digital halftoning using black and secondary color replacement and color vector dithering. Hewlett Packard Company, Dennis G Stenstrom, December 5, 1995: US05473446 (45 worldwide citation)

Provided is a system and method for selectively enabling a printer to deposit on a sheet cyan, magenta, yellow and black (C,M,Y and K) primary or black color dots at each of the plurality of pixel locations to produce a color image. The system comprises a memory for storing C, M, Y and K values for ...


3
Jaren D Marler, Ted Lee, Winthrop D Childers, Preston D Seu, Norman E Pawlowski Jr: Multiple cartridge printhead assembly for use in an inkjet printing system. Hewlett Packard Co, Dennis G Stenstrom, November 2, 1999: US05975677 (43 worldwide citation)

Described is a printing system including a first array of ink ejection elements formed on a first substrate surface for ejecting droplets of a first ink, a second array of ink ejection elements formed on a second substrate surface for ejecting droplets of a second ink, a memory element associated wi ...


4
Brian J Keefe, May F Ho, Kenneth J Courian, Steven W Steinfield, Winthrop D Childers, Ellen R Tappon, Kenneth E Trueba, Terri I Chapman, William R Knight, Jules G Moritz III: Ink channel structure for inkjet printhead. Hewlett Packard Company, Dennis G Stenstrom, January 14, 1997: US05594481 (42 worldwide citation)

Disclosed is an inkjet print cartridge including an ink reservoir; a substrate having a plurality of individual ink firing chambers with an ink firing element in each chamber along a top surface of said substrate and having a first outer edge along a periphery of substrate; the first outer edge bein ...


5
Winthrop D Childers, Brian J Keefe, John Paul Harmon: Ink delivery system for an inkjet pen having an automatic pressure regulation system. Hewlett Packard Company, Dennis G Stenstrom, March 9, 1999: US05880748 (41 worldwide citation)

An ink delivery system for an ink jet printing system having a printhead for ejecting droplets of ink, the printhead receiving ink at a controlled pressure, the controlled pressure having a specified pressure range that assures stable printhead operation which includes a replaceable ink supply remov ...


6
Hai Q Tran, Steven W Steinfield, Ali Emamjomeh, Joseph E Scheffelin: Inkjet print cartridge design for decreasing ink shorts by using an elevated substrate support surface to increase adhesive sealing of the printhead from ink penetration. Hewlett Packard Company, Dennis G Stenstrom, June 12, 2001: US06244696 (41 worldwide citation)

Disclosed is a flexible circuit that has a nozzle member formed therein with the nozzle member including a plurality of ink orifices and the flexible circuit having electrical leads. A substrate containing a plurality of heating elements and associated ink ejection chambers and having electrodes to ...


7
Scott W Hock, David A Johnson, Niels J Nielsen: Determining the operating energy of a thermal ink jet printhead using an onboard thermal sense resistor. Hewlett Packard Company, Dennis G Stenstrom, May 23, 1995: US05418558 (40 worldwide citation)

A method for operating a thermal ink jet printer including a printhead having ink firing heater resistors responsive to pulses provided to the printhead. A sequence of pulse bursts of respective increasing or decreasing pulse energies that span a predetermined pulse energy range is applied to the pr ...


8
Michael P Caren, Max Stephen Gunther, John C Nadworny: Inkjet cartridge design for facilitating the adhesive sealing of a printhead to an ink reservoir. Hewlett Packard Company, Dennis G Stenstrom, April 7, 1998: US05736998 (39 worldwide citation)

This disclosure describes an improved ink seal between a print cartridge body and an inkjet printhead. In a preferred embodiment, a nozzle member containing an array of orifices has a substrate, having heater elements formed thereon, affixed to a back surface of the nozzle member. Each orifice in th ...


9
Christopher A Schantz, Eric G Hanson, Si Ty, Paul H McClelland, William J Lloyd, Winthrop D Childers: Integrated nozzle member and tab circuit for inkjet printhead. Hewlett Packard Company, Dennis G Stenstrom, August 15, 1995: US05442384 (36 worldwide citation)

In one of the preferred embodiments, an inkjet printhead includes a nozzle member formed of a polymer material that has been laser-ablated to form inkjet orifices. The nozzle member also has formed on it conductive traces for supplying electrical signals to heating elements on a substrate mounted to ...


10
Matthew D Giere, Ronald A Askeland, Clayton L Holstun: Print mode for improved leading and trailing edges and text print quality. Hewlett Packard Company, Dennis G Stenstrom, June 19, 2001: US06247787 (36 worldwide citation)

Described is a method for incremental printing with an inkjet swath printer by depositing multiple drops of an ink from a printhead in each column of an image, in each scanning pass of the printhead over a print medium by obtaining the image, analyzing the image to determine which drops of ink will ...