| 摘要 |
PURPOSE:To enhance heat efficiency and to save waste of energy, by setting peripheral speed of one of conveying rollers faster than that of the other roller to bring a heat developable diazo photosensitive paper into secure contact with the arc shaped surface of a heater. CONSTITUTION:A heat insulating material 3 is covered on the outside of a sheet- shaped heater 1 having an arciform section in a developing device for a heat- developable diazo photosensitive paper or the like, and a guide plate 4 is arranged opposite to the heater 1 at a space apart, providing this space as a conveying route 5 for a photosensitive paper P. Its paper inlet and outlet are each provided with a pair of conveying rollers 6a, 6b and 7a, 7b. Among them, the roller 6b used for paper feed and arranged near the inside of the conveying route 5 is set faster in peripheral speed than the other rollers 6a, 7a, 7b, thus permitting the paper P to stand up at feed, and then to always keep its photosensitive face in contact with the inside face of the heater 1 by its rigidity. |
