Patent ID: 6923325

Claim:
A cassette for holding a plurality of film frames or wafers, the cassette comprising an enclosure portion having a closed top, a closed bottom, opposing closed sidewalls, a closed backside, and an open front, the enclosure portion further comprising: zone of insertion and removal of film frames or wafers, a plurality of horizontal shelves for holding the plurality of film frames or wafers horizontally and in a spaced and vertically stacked arrangement, and a pair of rotatable C-shaped retention members comprising a shaft portion and a retention portion, the retention members having a vertical axis of rotation passing through the zone of insertion and removal and pivotally positioned adjacent the sidewalls of the enclosure portion and pivotal between a retention position to retain the film frames or wafers on the shelves and a retracted position to allow the film frames or wafers to be inserted and removed from the enclosure portion.