Patent ID: 7575373

Claim:
A cassette tray configured to regulate and hold an X-ray film cassette by four sides, said cassette tray comprising: a front clamp, a rear clamp, and opposing side clamps, each of said front clamp, rear clamp, and said side clamps configured to clamp a front side, a rear side, and two opposing sides of the X-ray film cassette; a front clamp supporting unit configured to support said front clamp such that said front clamp is capable of being withdrawn and returned in a direction vertical to a surface of the X-ray film cassette; a rear clamp supporting unit configured to support said rear clamp such that said rear clamp is capable of being advanced and retreated in a direction parallel to the surface of the X-ray film cassette; a side clamp supporting unit configured to support said side clamps such that said side clamps are movable in a direction in which said side clamps are positioned apart from each other and in a direction in which said side clamps are positioned close to each other; and a driving unit configured to drive a spring in the direction in which said side clamps are positioned apart from each other and in the direction in which said side clamps are positioned close to each other according to the advance and retreat of said rear clamp.