Patents Assigned to Tetra Pak Developpement Ltd.
  • Patent number: 4439686
    Abstract: This disclosure is concerned with a process of and apparatus for producing relatively low energy electron beams through pulsed cold-cathode beam generation in a mode of operation involving an important intermediate region of a substantially linear depth-dose profile characteristic that reduces the sensitivity to possible voltage variations, and with improved triggering structures that significantly improve reliability and minimize erratic pulse generation and missing pulses, thus particularly adapting the process and apparatus for such stringent applications as production-line sterilization of surfaces, materials or workpieces passed by the apparatus.
    Type: Grant
    Filed: September 28, 1982
    Date of Patent: March 27, 1984
    Assignee: Tetra Pak Developpement Ltd.
    Inventor: Richard N. Cheever
  • Patent number: 4305000
    Abstract: This disclosure is concerned with a process of and apparatus for producing relatively low energy electron beams through pulsed cold-cathode beam generation in a mode of operation involving an important intermediate region of a substantially linear depth-dose profile characteristic that reduces the sensitivity to possible voltage variations, and with improved triggering structures that significantly improve reliability and minimize erratic pulse generation and missing pulses, thus particularly adapting the process and apparatus for such stringent applications as production-line sterilization of surfaces, materials or workpieces passed by the apparatus.
    Type: Grant
    Filed: November 3, 1978
    Date of Patent: December 8, 1981
    Assignee: Tetra Pak Developpement Ltd.
    Inventor: Richard N. Cheever