| 摘要 |
PURPOSE:To permit sure fixing of photosensitive sheet films between a base part and flexible cover member by providing a protective cover which brings the flexible cover member into pressurized contact with the photosensitive sheet films to a light shieldable tray base provided with the flexible cover member. CONSTITUTION:The flexible cover member 2 is heat-sealed to flange parts 6 of the light shieldable tray base 2 and radioactive films 12 are hermetically sealed therein. Engaging pieces 13 bend downward are formed to the flange parts 6 on both sides of the tray base 1. The cover member 2 is clad by the protective cover member 14. This member 14 is formed to the outside shape slightly larger than the flange parts 6 and is formed with projecting parts 15 projecting downward at 3 points. The projecting parts 15 press the cover member 2 to bring said member into pressurized contact with the films 12. The sheet films are thereby prevented from slipping even during transportation, etc., and the infiltration of external light to the films and the influence of an external pressure are prevented. |
