Patents by Inventor Charles R. Headrick

Charles R. Headrick 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).

  • Patent number: 7467862
    Abstract: A printing apparatus includes one of a first cartridge or a second cartridge. The first cartridge has a first contact array including a plurality of contact areas. The second cartridge has a second contact array including a plurality of contact areas. The locations of the contact areas of the first contact array are different from locations of the contact areas of the second contact array. The printing apparatus further includes a carriage that interchangeably receives the first cartridge and the second cartridge. A controller identifies whether the first cartridge or the second cartridge is installed in the carriage.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: December 23, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Naoto Kawamura, Erik D. Ness, William S. Eaton, Charles R. Headrick
  • Patent number: 7137690
    Abstract: A print cartridge includes a cartridge body having a lower portion and a vertical wall. A printhead is coupled with the lower portion of the cartridge body. A contact array including a plurality of contact areas is disposed on the vertical wall. The contact array is one of at least two contact arrays. Each contact array has a different pattern of contact area locations. A portion of the contact areas of each contact array are capable of providing identity information for the print cartridge.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: November 21, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Naoto Kawamura, Erik D. Ness, William S. Eaton, Charles R. Headrick
  • Patent number: 7101029
    Abstract: A printing apparatus includes one of a first cartridge or a second cartridge. The first cartridge has a first contact array including a plurality of contact areas. The second cartridge has a second contact array including a plurality of contact areas. The locations of the contact areas of the first contact array are different from locations of the contact areas of the second contact array. The printing apparatus further includes a carriage that interchangeably receives the first cartridge and the second cartridge. A controller identifies whether the first cartridge or the second cartridge is installed in the carriage.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: September 5, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Naoto Kawamura, Erik D. Ness, William S. Eaton, Charles R. Headrick
  • Patent number: 6621676
    Abstract: An apparatus and method of use opposes a short circuit failure mode in a printer having a printhead controller circuit driving an address bus connected to two or more printheads. A failure protection circuit associates one resistor group with each address line within the address bus that extends into at least two printheads. In particular, one address line resistor is placed in series between the address lead extending from a head driver IC within the printhead controller circuit and each printhead into which the address line extends. Where an address line shorts, the associated address line resistor protects the head driver IC from the short, allowing it to control the voltage potential of that address line in any printhead that has not failed. The user is then able to identify and replace the non-functioning printhead.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: September 16, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: E. Lewis Barton, Charles R. Headrick
  • Publication number: 20030081367
    Abstract: An apparatus and method of use opposes a short circuit failure mode in a printer having a printhead controller circuit driving an address bus connected to two or more printheads. A failure protection circuit associates one resistor group with each address line within the address bus that extends into at least two printheads. In particular, one address line resistor is placed in series between the address lead extending from a head driver IC within the printhead controller circuit and each printhead into which the address line extends. Where an address line shorts, the associated address line resistor protects the head driver IC from the short, allowing it to control the voltage potential of that address line in any printhead that has not failed. The user is then able to identify and replace the non-functioning printhead.
    Type: Application
    Filed: October 30, 2001
    Publication date: May 1, 2003
    Inventors: E. Lewis Barton, Charles R. Headrick
  • Patent number: 6347868
    Abstract: A painting tool with a carriage having a control switch, control circuitry, and an ink jet pen connected to the carriage and control circuitry. An ink jet pen may be included in the carriage, and more than one switch may be provided, with one switch controlling hue, and the other controlling flow rate. An on-board power source may be included to provide cordless operation.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: February 19, 2002
    Assignee: Hewlett-Packard Company
    Inventors: Charles R. Headrick, Eric T. Martin