Abstract: A light weight x-ray cassette formed from Hylite which is an metal/polymer/metal material. The cassette comprises: a front panel and a back panel formed from the Hylite composite material with the front and the back panels being operatively hinged together by a hinging element attached to the panels so as to form a cavity between the panels; an x-ray film contained within the cavity between the first panel and the second panel; at least one intensifying screen held in contact with the x-ray film; and a latching element to open and close the cassette.

Abstract: A coating apparatus (10) for coating a radiation-sensitive emulsion (30) on a photographic support (24) is fabricated from hopper bars (12) having a ceramic coating surface (20). An initial surface finish treatment is first applied to the ceramic coating surface, after which the coating surface is polished, to decrease the roughness of the coating surface sufficiently to prevent the formation of streaks in the emulsion coating layer or layers on the support.

Abstract: An optical disc assembly includes a flexible disc-shaped support carrying a record layer. The support has an information storage region. A pair of annular retaining ring members engage opposite sides of an annular peripheral region of the support as the ring members close together to clamp the support therebetween. The peripheral region of the support is wrapped about an annular reference surface of one ring member and is pushed into an annular recess in that ring member. Cooperative surfaces on the ring members provide a locking interfit therebetween with the peripheral region of the support interleaved between the ring members.