Patents Examined by David J. Serverin
  • Shutter spring for disk cartridge
    Patent number: 4935834
    Abstract: A disk cartridge for a rotatable recording disk includes a slidable shutter for providing access to the recording disk through the disk cartridge. A unique mounting for a return spring for the shutter allows the return spring to be of a maximum length which allows increased control of the forces generated by the return spring. The disk cartridge is further provided with a locking mechanism for preventing movement of the recording disk within the disk cartridge during storage.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: June 19, 1990
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert A. Muehlhausen