PRESSURIZING WELDING STRUCTURE AND METHOD FOR WELDING TONER IMAGE AT SUPPORTING LAYER

PROBLEM TO BE SOLVED: To provide a dissociation agent control system constituted so that dissociation agent is not exposed to excessive heat. SOLUTION: The dissociation agent control system 28 using a heating, pressurizing and welding device is constituted so that a toner image 22 on the supporting layer 20 of a plain paper and the like is coated with the dissociation agent 24. The system 28 is provided with a hard metering roll 26 and a pressure roll 14 for forming a nip 18 where the layer 20 carrying the image 22 by pressure contact is passed so that the roll 26 and the image 22 are brought into contact with each other. Then, the roll 26 is coated with the agent 24 from a dissociation agent reservoir 30 and the agent 22 is carried to the image 22 on the layer 20 besides.