Abstract: An image forming apparatus includes an exposure portion having a light source, for forming a latent image on a photothermographic imaging material by exposing a light beam, a thermal development portion having a heating portion for thermally developing by heating the photothermographic imaging material on which the latent image is formed, and a cooling and conveying portion for conveying and cooling the thermally developed photothermographic imaging material, a temperature detecting member for detecting at least one of a temperature of a predetermined portion concerning the cooling and conveying portion, and a temperature in a vicinity of the exposure portion, and a control unit for controlling a factor relating to thermal development on a basis of the temperature detected by the temperature detecting member.

Abstract: There is described a thermal development apparatus, which makes it possible to prevent generation of density variations caused by changes of the processing temperature during the thermal developing operation when the thermal developing photosensitive material is continuously processed, without increasing the cost of the apparatus so much. The thermal development apparatus includes a thermal developing processor to apply a thermal development processing to the thermal developing photosensitive material, a detector to detect the thermal developing photosensitive material to be conveyed into the thermal developing processor and a controller to control the thermal developing processor in a feed forward controlling mode based on a processing condition of the thermal developing processor. The processing condition is established in advance, corresponding to a load of processing the thermal developing photosensitive material detected in advance by the detector.

Abstract: There is described a thermal development apparatus, which makes it possible to prevent generation of density variations caused by changes of the processing temperature during the thermal developing operation when the thermal developing photosensitive material is continuously processed, without increasing the cost of the apparatus so much. The thermal development apparatus includes a thermal developing processor to apply a thermal development processing to the thermal developing photosensitive material, a detector to detect the thermal developing photosensitive material to be conveyed into the thermal developing processor and a controller to control the thermal developing processor in a feed forward controlling mode based on a processing condition of the thermal developing processor. The processing condition is established in advance, corresponding to a load of processing the thermal developing photosensitive material detected in advance by the detector.

Abstract: An image forming apparatus comprising: an exposure portion having a light source, for forming a latent image on a photothermographic imaging material by exposing a light beam to the photothermographic imaging material from the light source; a thermal development portion having a heating portion for thermally developing by heating the photothermographic imaging material on which the latent image is formed, and a cooling and conveying portion for conveying and cooling the thermally developed photothermographic imaging material; a temperature detecting member for detecting at least one of a temperature of a predetermined portion in the thermal development portion and a temperature in a vicinity of the exposure portion; and a control unit for controlling a factor relating to thermal development on a basis of the temperature detected by the temperature detecting member.