| 摘要 |
PURPOSE:To prevent flaws an pressure marks on a film, by rotating automatically a film carrying roller freely in accordance with a tensile force when the tensile force which gives a carrying speed higher than the circumferential speed of the film carrying roller is applied. CONSTITUTION:When a band-shaped film 1 to which a tensile force P is given by the enhancement of the speed of a drying rack 5 is drawn out through a developing rack 2, a fixing rack 3, and water washing rack 4, the speed is enhanced beyond requirements in the fixing rack 3 and the water washing rack 4 so as to enhance the speed in the developing rack 2 for the purpose of absorbing the expansion of the band-shaped film 1. For example, a unidirectional automatic clutch is incorporated in a rotation transmitting mechanism; and when the film 1 is carried while the tensile force P which gives a carrying speed higher than the circumferential speed of a roller 6 is applied to the film 1, the roller 6 is rotated freely together with the band-shaped film 1 more fast by components corresponding to the speed enhancement in accordance with the tensile force P, thus transmitting effectively the speed enhancement from the drying rack 5 to the developing rack 2. |
