X-Ray film-holding device with convex cushion members

Abstract

Swingable front and back plates are supported by a hinge. Cushion members are pasted individually on the inner surfaces of the front and back plates. The cushion members individually have two-dimensional curved surfaces with the same radius of curvature, and are arranged so that the directions of curvature of their curved surfaces cross substantially at right angles. Intensifying screens curved to match the surfaces of the cushion members are pasted thereon. An X-ray film is sandwiched between the intensifying screens, and the front and back plates are joined together. Thereupon, the region of each cushion member, pressing the X-ray film through its corresponding intensifying screens, extends gradually, moving its center from the hinge side to the free-end side. When the front and back plates are joined together, the X-ray film receives a maximum pressing force from the center of each cushion member. The pressing force decreases with radial distance from the center.

Dependencies are inferred from the claim text.