Patents Assigned to PRINTRONIX, LLC
  • Patent number: 12728657
    Abstract: Systems and methods related to adaptive ribbon speed control for a line matrix impact printer are provided. A ribbon cartridge includes a ribbon configured to be driven at a ribbon speed, and a ribbon gear configured to rotate with movement of the ribbon. The ribbon includes a ribbon joint patch detectable via a first sensor to determine a first ribbon speed of the ribbon. Rotation of the ribbon gear is detectable via a second sensor to determine a second ribbon speed of the ribbon. A target ribbon speed is determined based on at least one print job characteristic. A current ribbon speed is determined based on the first ribbon speed and the second ribbon speed. The ribbon speed is adjusted based on a difference between the current ribbon speed and the target ribbon speed. Associated systems and methods are also provided.
    Type: Grant
    Filed: December 16, 2024
    Date of Patent: September 8, 2026
    Assignee: PRINTRONIX, LLC
    Inventors: Yu-Min Grant Chang, Robert Ovcharenko, Lee Fang Chong, Ming Ming Yin
  • Patent number: 12208635
    Abstract: Systems and methods related to adaptive ribbon speed control for a line matrix impact printer are provided. A ribbon cartridge includes a ribbon configured to be driven at a ribbon speed, and a ribbon gear configured to rotate with movement of the ribbon. The ribbon includes a ribbon joint patch detectable via a first sensor to determine a first ribbon speed of the ribbon. Rotation of the ribbon gear is detectable via a second sensor to determine a second ribbon speed of the ribbon. A target ribbon speed is determined based on at least one print job characteristic. A current ribbon speed is determined based on the first ribbon speed and the second ribbon speed. The ribbon speed is adjusted based on a difference between the current ribbon speed and the target ribbon speed. Associated systems and methods are also provided.
    Type: Grant
    Filed: February 27, 2023
    Date of Patent: January 28, 2025
    Assignee: PRINTRONIX, LLC
    Inventors: Yu-Min Grant Chang, Robert Ovcharenko, Lee Fang Chong, Ming Ming Yin