| 摘要 |
PURPOSE:To prevent the exposure of a sensitive material by an operator's careless mistake by making a stopper for releasing a lock turnable only in a state in which the opening and closing plate of a sensitive material box is closed. CONSTITUTION:A sensitive material box 1 set in an exposing device may be detached from the exposing device by an operator's mistake in a state in which the opening and closing plate 3 of the box 1 is open. In this case, a stopper 18 for releasing a lock hits a slide shaft 4 on the box 1 and can not turn because the shaft 4 has been moved to the position of the stopper 18. Accordingly, a knob for releasing the lock can not be turned, the lock is not released and the box 1 can not be detached. Thus, the box 1 is not detached in a state in which the plate 3 is open, so the careless exposure of an unused sensitive material in the box 1 is prevented. |
