Patents Assigned to Spectrum Technologies Limited
  • Laser marking apparatus and methods
    Patent number: 6144011
    Abstract: A method and apparatus for laser marking a moving workpiece such as a wire or cable directs a substantially constant rapidly pulsed laser beam at a frequency of at least 15 Hz towards a low inertia, low mass rotatable mask with character apertures disposed around its periphery. The mask is driven asynchronously to present successive characters with each pulse to form a composite image.
    Type: Grant
    Filed: August 24, 1998
    Date of Patent: November 7, 2000
    Assignee: Spectrum Technologies Limited
    Inventors: John Moss, Simon Lau, David Keston Phillips