Image scanner with paper sheet indexing by a scanning carriage actuating a barrel cam mounted on the shaft of an index roll

摘要

A scanner has a frame assembly (15) including a carriage (20) movably mounted in the frame assembly ( 15) for scanning movement in a scanning path in a first direction (33a) along the length of the frame assembly (15), the frame assembly (15) includes at least one sheet transport path with an indexer (35-39, 42, 46, 63-74) to index a sheet ( 13, 14) through the path; the indexer (35-39, 42, 46, 63-74) including at least one index roll (35, 42, 46) mounted on a rotatable shaft (36) having a barrel cam (39) at one end which is actuated by the scanning carriage (20) at the end of the scanning path to rotate the at least one index roll (35, 42, 46) a portion (M, N) of a revolution. IMAGE