Minnesota Mining and Manufacturing Company

Paul D Rumpza

James J Wulfing

A disk cartridge including a rotatable disk, a cartridge case for housing the disk, and a U-shaped shutter slidably disposed on the front wall of the cartridge case is disclosed. The cartridge case includes upper and lower walls, and a head access opening formed in both walls between a central axis and the front wall to access the disk. The access opening is opened and closed by the shutter which is biased closed. An indented portion is formed on the walls for receiving the shutter. Two tabs are formed in one shutter arm portion and are received in a slot formed in the cartridge case.

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Roseville, MN, United States of America

Paul D Rumpza