| 摘要 |
It is an object of the present invention to provide a heating apparatus that eliminates the poor heating due to thermal expansion and thereby assures satisfactory thermal developing performance without unevenness and which, in addition, is capable of processing printing plates wider than 400 mm, as well as a thermal developing system equipped with said heating apparatus. The heating apparatus 1 having a pressure contact zone P, in which the length lo of the pressure contact zone P in the direction of travel is set by calculation from the relation (1): lo = dl/( alpha .dT), where lo is the length of the pressure contact area in the direction of travel, dT is an incremental temperature elevation, alpha is the coefficient of thermal expansion of the metal support of an original printing plate lo, and dl is the thermal expansion in millimeters of the metal support in the pressure contact zone P in the direction of travel, such that dl satisfies dl < 0.13/D, where D is the thickness in millimeters of the metal support. <IMAGE> |
