Synchronous driving apparatus for a scanning exposure type reproducing apparatus.

摘要

A synchronous driving apparatus for a scanning exposure type reproducing apparatus comprises: a feeding roller formed of rubber for feeding an image recording sheet; a pressing roller (16, 17) formed of rubber for pressing the image recording sheet onto the feeding roller; a first steel belt (6) for rotating the feeding roller through a pulley; an input roller (3) formed of rubber rotated by the first steel belt through the pulley; an output roller (10) formed of stainless steel provided rotatably so as to be in contact with the input roller (3); a second steel belt moving in synchronization with the rotation of the output roller through a pulley fixed on the same axis as the output roller; and an original holding frame (8) fixed on the second steel belt (7) for holding the original, moved in a prescribed direction for scanning. The ratio of the change of the frictional force due to the change of the temperature between the input roller formed of rubber and the output roller formed of stainless steel is the same as the ratio of the change of the frictional force between the image recording sheet and the feeding roller formed of rubber.