JPS55105257A - Both side image forming device - Google Patents

Abstract

PURPOSE:To prevent the occurrence of double feeding and biasing at the refeeding of paper by letting the shape of a middle plate provided to a copying material holding means after finishing of the copying processing on one side of copying material be the shape which conforms to the curled state of copying paper thereby perfectly matching the end parts. CONSTITUTION:At least the central part 26 of a middle plate 1 is formed to an upward convex shape with respect to, e.g., upper side curled paper to be placed on an intermediate cassette 19. Or in place of forming the central part to a convex shape, a protrusion such as rib is provided to this portion. Then, at least the central part of copying paper conforms to the shape of the middle plate owing to gravity and therefore the angle part 2 of the copying paper lowers relatively. Hence, even if the copying paper increases, the angle part 2 of the copying paper will not go beyond separating claws 4 and its end part 22 makes contact with the front plate 23 of the cassette, in which state it is placed. In addition, a recess is provided to the central part of the middle plate 1 for the lower side curled copying paper. In this way, the double feeding and biasing at the refeeding of paper may be prevented.