Patents by Inventor David Purcell

David Purcell 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).

  • Ink jet printer incorporating high volume ink reservoirs
    Patent number: 6565197
    Abstract: An ink jet printer having an inking system that includes an ink jet cartridge, a large ink reservoir mounted inside the housing of the ink jet printer at a location which is remote from the ink jet cartridge and tubing connecting the ink reservoir to the ink jet cartridge. The large ink reservoirs may be pancake shaped, and may be stacked in side by side horizontal manner within the housing. A portion of the reservoir is transparent, and is visible to the operator for operator monitoring of ink level through openings in the printer housing placed in juxtaposition with the transparent portion of the large ink reservoirs.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: May 20, 2003
    Assignee: Encad, Inc.
    Inventors: Richard A. Murray, William M. Fries, David A. Purcell
  • Intelligent printer components and printing system
    Patent number: 6375298
    Abstract: An ink jet printer with intelligent components includes an ink jet cartridge and a roll of print media, each of which incorporate memory elements. Environmental sensors such as temperature and humidity sensors may also be provided. Data from the memory elements and environmental sensors is used to optimize printer operations, and to provide additional information to printer operators.
    Type: Grant
    Filed: February 23, 2001
    Date of Patent: April 23, 2002
    Assignee: Encad, Inc.
    Inventors: David A. Purcell, Richard A. Murray, Dan J. Dull
  • Ink droplet analysis apparatus
    Patent number: 6347857
    Abstract: A droplet deposition analysis system for an ink jet printer including a flexible transparent substrate. The printer may include a light source on one side of the substrate, and an optical detector on the other side of the substrate.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: February 19, 2002
    Assignee: Encad, Inc.
    Inventors: David A. Purcell, David A. Neese, Warren Free
  • Intelligent printer components and printing system
    Publication number: 20010007458
    Abstract: An ink jet printer with intelligent components includes an ink jet cartridge and a roll of print media, each of which incorporate memory elements. Environmental sensors such as temperature and humidity sensors may also be provided. Data from the memory elements and environmental sensors is used to optimize printer operations, and to provide additional information to printer operators.
    Type: Application
    Filed: February 23, 2001
    Publication date: July 12, 2001
    Inventors: David A. Purcell, Richard A. Murray, Dan J. Dull
  • Intelligent printer components and printing system
    Patent number: 6227643
    Abstract: An ink jet printer with intelligent components includes an ink jet cartridge and a roll of print media, each of which incorporate memory elements. Environmental sensors such as temperature and humidity sensors may also be provided. Data from the memory elements and environmental sensors is used to optimize printer operations, and to provide additional information to printer operators.
    Type: Grant
    Filed: February 25, 1998
    Date of Patent: May 8, 2001
    Assignee: ENCAD, Inc.
    Inventors: David A. Purcell, Richard A. Murray, Dan J. Dull
  • System and method for selecting an interrupt system based upon the operating system of a multiprocessor system
    Patent number: 5802350
    Abstract: A system and method for allowing different operating systems to be utilized in a multiprocessing system is provided in which each of the different operating systems requires different types of interrupt controllers. The system and method comprises detecting which of the at least two different types of operating systems is utilized within the multiprocessing system, and then selecting the appropriate interrupt controller from the different types of interrupt controllers.
    Type: Grant
    Filed: January 18, 1996
    Date of Patent: September 1, 1998
    Assignee: International Business Machines Corporation
    Inventors: Keenan Wynn Franz, John David Purcell, Kevin F. Reick
  • Ink jet printer incorporating high volume ink reservoirs
    Patent number: 5686947
    Abstract: An ink jet printer having an inking system that includes an ink jet cartridge, a large ink reservoir mounted inside the housing of the ink jet printer at a location which is remote from the ink jet cartridge and tubing connecting the ink reservoir to the ink jet cartridge. The large ink reservoirs may be pancake shaped, and may be stacked in side by side horizontal manner within the housing. A portion of the reservoir is transparent, and is visible to the operator for operator monitoring of ink level through openings in the printer housing placed in juxtaposition with the transparent portion of the large ink reservoirs.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: November 11, 1997
    Assignee: ENCAD, Inc.
    Inventors: Richard A. Murray, William M. Fries, David A. Purcell