Automatic document conveyer

An automatic document conveyer comprising a moving frame arranged to move between a closed position where it covers a transparent plate arranged on the upper surface of a machine housing and an open position where it permits the transparent plate to be exposed, and a conveyer belt mechanism which conveys the document when said moving frame is brought to the closed position, said moving frame being turnably mounted on said machine housing via a hinge mechanism;

• wherein
• said conveyer belt mechanism includes a support frame, a drive roller and a driven roller arranged apart from each other in said support frame in parallel in the direction of conveying the document, and a conveyer belt wrapped round said drive roller and said driven roller, said conveyer belt mechanism being supported on said moving frame by a first support means that supports said support frame on the side of said hinge mechanism and by a second support means that supports said support frame at an end on the side opposite to said hinge mechanism;
• said first support means moves said conveyer belt mechanism by a predetermined amount toward the side opposite to said hinge mechanism while the end of said conveyer belt on the side of said hinge mechanism reaches to said closed position after having come in contact with said transparent plate, at the time when said moving frame is turned toward said closed position;
• and
• said second support means permits the motion of said conveyer belt mechanism.