To enhance cost effectiveness by surely reusing an old form plate.
An old form plate-holding part 34 which holds an old form plate 35 rewound from a plate cylinder is formed of a cover member 9 and a guide plate 33 in the inside of a loader 2. When the old form plate 35 comes into the old form plate-holding part 34, a form plate hanger 37 is turned and the bending end 35a of the old form plate 35 is caught by a bending part 37a. When a pulley is rotated in this state, the old form plate 35 is pulled up and thereafter the form plate hanger 37 is turned. Thereby, the old form plate 35 is released from hold and held by the loader 2. A guide member 30 formed of fluororesin is provided in the cover member 9 so as to be projected from the surface of the cover member 9.
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