Patents by Inventor Jack B. MacDonald

Jack B. MacDonald 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).

  • Hot melt ink supply unit
    Patent number: 5172135
    Abstract: In the embodiment of the hot melt ink supply unit described in the specification, a block of solid hot melt ink has a peripheral surface formed with a key configuration and a handle is removably connected to the block by a threaded projection. After insertion of the block into a correspondingly keyed opening in a heated reservoir, the handle is turned to separate the handle portion from the block of solid ink. A container provided with a removable seal encloses the block of solid ink and handle to protect the ink from contamination.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: December 15, 1992
    Assignee: Spectra, Inc.
    Inventors: Linda T. Creagh, Charles W. Spehrley, Jr., Nathan P. Hine, Dean H. Cranston, Jack B. MacDonald
  • Holt melt ink supply unit
    Patent number: 5003322
    Abstract: In the embodiment of the hot melt ink supply unit described in the specification, a block of solid hot melt ink has a peripheral surface formed with a key configuration and a handle is removably connected to the block by a threaded projection. After insertion of the block into a correspondingly keyed opening in a heated reservoir, the handle is turned to separate the handle portion from the block of solid ink. A container provided with a removable seal encloses the block of solid ink and handle to protect the ink from contamination.
    Type: Grant
    Filed: July 14, 1989
    Date of Patent: March 26, 1991
    Assignee: Spectra, Inc.
    Inventors: Linda T. Creagh, Charles W. Spehrley, Jr., Nathan P. Hine, Dean H. Cranston, Jack B. MacDonald
  • Method of forming a hot melt ink unit
    Patent number: 4864330
    Abstract: In the embodiment of the hot melt ink supply unit described in the specification, a block of solid hot melt ink has a peripheral surface formed with a key configuration and a handle is removably connected to the block by a threaded projection. After insertion of the block into a correspondingly keyed opening in a heated reservoir, the handle is turned to separate the handle portion from the block of solid ink. A container provided with a removable seal encloses the block of solid ink and handle to protect the ink from contamination.
    Type: Grant
    Filed: February 1, 1989
    Date of Patent: September 5, 1989
    Assignee: Spectra, Inc.
    Inventors: Linda T. Creagh, Charles W. Spehrley, Jr., Nathan P. Hine, Dean H. Cranston, Jack B. MacDonald