| 摘要 |
PURPOSE:To prevent photographic paper from being exposed even when the device is left without being operated for a long time by providing a means to detect temperature inside a device and a controlling means which controls a varying means responding to the detected output of a temperature detecting means. CONSTITUTION:Means 22, 24, and 25 which vary the opening amount of an air exhausting hole, a means 27 which detects the temperature inside the device, and a controlling means 28 which controls the varying means 22, 24, and 25 responding to this detected output are provided. Therefore, when the device is not operated, the operation of a heat generating source is stopped, and since there is no rising in temperature, when the fact that the temperature inside the device is not high is detected by the temperature detecting means 27, the opened amount of the exhausting holes are decreased to prevent entering of light. Thus, even when the device is left without being activated for a long period of time, the photographic paper is rarely exposed. |
