Patents by Inventor Preston D. Seu
Preston D. Seu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20090295848Abstract: A tip to be placed on a fluid-ejection device is filled with fluid. The fluid may be introduced into a substantially hollow body of the tip at a first end of the body. The body of the tip has a second end at which a fluid-ejection mechanism is disposed to eject the fluid as controlled by the fluid-ejection device. The fluid may be introduced into the substantially hollow body of the tip through of the fluid-ejection mechanism disposed at the second end of the body of the tip. The tip may further be identified and/or serviced, and the tip and/or the fluid-ejection device may further be validated.Type: ApplicationFiled: July 12, 2009Publication date: December 3, 2009Inventors: Blair Kent, James P. Axtell, Trudy Benjamin, David J. Lowe, Preston D. Seu
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Patent number: 7284844Abstract: An air-driven delivery assembly for delivering marking material to a print head includes a supply reservoir configured to contain a quantity of marking material, a containment chamber coupled to the supply reservoir, and a low pressure source coupled to the containment chamber wherein activation of the low pressure source draws marking material from the supply reservoir into the containment chamber.Type: GrantFiled: July 30, 2004Date of Patent: October 23, 2007Assignee: Hewlett-Packard Development Comapny, L.P.Inventor: Preston D. Seu
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Method of manufacture for ink-jet hard copy apparatus using a modular approach to ink-jet technology
Patent number: 6493937Abstract: A manufacturing method provides ink-jet writing engine modules for use with a compatible hard copy engine module, a hard copy apparatus based thereon, and methods of manufacturing, operation, and use. Fluidic and electronic partitioning for ink-jet hard copy apparatus is redefined. Modular separation of a hard copy engine from a writing engine allows a replaceable writing module containing all of the key elements of the ink-jet writing system based on writing system technology requirements, particularly for those most likely to age or fail as a result of time, frequency of use, or end-user actions.Type: GrantFiled: March 16, 1998Date of Patent: December 17, 2002Assignee: Hewlett-Packard CompanyInventors: James P Axtell, Trudy L Benjamin, David J Lowe, Preston D. Seu, Blair M. Kent -
Patent number: 6302503Abstract: An inkjet printing system includes a permanent or semi-permanent inkjet pen containing small glass beads for ink containment and to provide backpressure to the ink. The inkjet pen walls are transparent, and the printer has an optical sensor that detects changes in reflectivity in the glass beads. The glass beads change in reflectivity depending on whether or not they are saturated with ink. The change in reflectivity therefore functions as an effective out-of-ink detector. When an out of ink indication is made, the printer executes a refill of the pen. Two embodiments of refill mechanisms are disclosed: a trailing tube design, and a take-a-sip design.Type: GrantFiled: October 28, 1998Date of Patent: October 16, 2001Assignee: Hewlett-Packard CompanyInventor: Preston D. Seu
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Patent number: 6264322Abstract: The present invention provides ink-jet writing engine modules for use with a compatible hard copy engine module, a hard copy apparatus based thereon, and methods of manufacturing, operation, and use. Fluidic and electronic partitioning for ink-jet hard copy apparatus is redefined. Modular separation of a hard copy engine from a writing engine allows a replaceable writing module containing all of the key elements of the ink-jet writing system based on writing system technology requirements, particularly for those most likely to age or fail as a result of time, frequency of use, or end-user actions.Type: GrantFiled: May 10, 2000Date of Patent: July 24, 2001Assignee: Hewlett-Packard CompanyInventors: James P Axtell, Trudy L Benjamin, David J Lowe, Preston D. Seu, Blair M. Kent
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Patent number: 6257717Abstract: The present invention provides ink-jet writing engine modules for use with a compatible hard copy engine module, a hard copy apparatus based thereon, and methods of manufacturing, operation, and use. Fluidic and electronic partitioning for ink-jet hard copy apparatus is redefined. Modular separation of a hard copy engine from a writing engine allows a replaceable writing module containing all of the key elements of the ink-jet writing system based on writing system technology requirements, particularly for those most likely to age or fail as a result of time, frequency of use, or end-user actions.Type: GrantFiled: May 10, 2000Date of Patent: July 10, 2001Assignee: Hewlett-Packard CompanyInventors: James P Axtell, Trudy L Benjamin, David J Lowe, Preston D. Seu, Blair M. Kent
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Patent number: 6234626Abstract: The present invention provides ink-jet writing engine modules for use with a compatible hard copy engine module, a hard copy apparatus based thereon, and methods of manufacturing, operation, and use. Fluidic and electronic partitioning for ink-jet hard copy apparatus is redefined. Modular separation of a hard copy engine from a writing engine allows a replaceable writing module containing all of the key elements of the ink-jet writing system based on writing system technology requirements, particularly for those most likely to age or fail as a result of time, frequency of use, or end-user actions.Type: GrantFiled: May 10, 2000Date of Patent: May 22, 2001Assignee: Hewlett-Packard CompanyInventors: James P Axtell, Trudy L Benjamin, David J Lowe, Preston D. Seu, Blair M. Kent
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Patent number: 6082854Abstract: The present invention provides ink-jet writing engine modules for use with a compatible hard copy engine module, a hard copy apparatus based thereon, and methods of manufacturing, operation, and use. Fluidic and electronic partitioning for ink-jet hard copy apparatus is redefined. Modular separation of a hard copy engine from a writing engine allows a replaceable writing module containing all of the key elements of the ink-jet writing system based on writing system technology requirements, particularly for those most likely to age or fail as a result of time, frequency of use, or end-user actions.Type: GrantFiled: March 16, 1998Date of Patent: July 4, 2000Assignee: Hewlett-Packard CompanyInventors: James P Axtell, Trudy L Benjamin, David J Lowe, Preston D. Seu, Blair M. Kent
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Patent number: 6036296Abstract: A fluid level detection system for determining the volume of fluid in a container, is disclosed. An embodiment includes a fluid container, a reference chamber, a pressure chamber, an air source, an air management system including at least one orifice, a pressure sensor, a time measurement device, and a computing device. The air management system selectively pressurizes the reference chamber or pressure chamber and selectively discharges the reference chamber or pressure chamber via the orifice. The time measurement device determines elapsed time (.DELTA.t.sub.R) for pressure in the reference chamber to drop from pressure (P.sub.R1) to pressure (P.sub.R2) and elapsed time (.DELTA.t.sub.P) for pressure in the pressure chamber to drop from pressure (P.sub.P1) to pressure (P.sub.P2). The computing device determines a volume of air in the pressure chamber based upon the reference chamber volume, elapsed time (.DELTA.t.sub.R), elapsed time (.DELTA.t.sub.P), and pressures (P.sub.R1), (P.sub.R2), (P.sub.P1), and (P.Type: GrantFiled: October 31, 1996Date of Patent: March 14, 2000Assignee: Hewlett-Packard CompanyInventors: James P. Axtell, Preston D. Seu
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Patent number: 5975677Abstract: 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 with the first and second arrays of ink ejection elements contains parameters that relate droplet ejection characteristics of the first and second array of ink ejection elements. The droplet ejection characteristics may contain ink ejection alignment data that enables the calculation of the relative alignment between the first and second arrays of ink ejection elements such that droplets of the first ink can be effectively aligned with droplets of the second ink. Also, ink droplet volume data enables the calculation of the relative drop volume between the first and second arrays of ink ejection elements such that the printing system can provide hue control.Type: GrantFiled: April 30, 1997Date of Patent: November 2, 1999Assignee: Hewlett-Packard Co.Inventors: Jaren D. Marler, Ted Lee, Winthrop D. Childers, Preston D. Seu, Norman E. Pawlowski, Jr.
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Patent number: 5779376Abstract: Disclosed is an improved printer and carriage drive mechanism. The carriage motor is mounted at a first side of the printer chassis, and an idler pulley is mounted at a second side of the chassis. The carriage also has a pair of idler pulleys. A single flat smooth belt is attached to the first side of the chassis. From there, it passes over to and around one of the idler pulleys on the carriage, back to and around the motor pulley, across the print zone and around the idler pulley on the second side of the chassis, back to and around the other carriage idler pulley, and then back to the second side of the chassis, where it is attached. The motor is movably attached to the chassis and is tensioned by a spring. This mechanism provides for substantial mechanical advantage over common simple carriage drive mechanisms. A smaller, less expensive motor and a quieter flat smooth belt can be used. The motor is allowed to run at more optimal speeds and expensive ball bearings can be avoided in the motor and pulleys.Type: GrantFiled: October 31, 1996Date of Patent: July 14, 1998Assignee: Hewlett-Packard CompanyInventor: Preston D. Seu