Xerox 6180N Generic MICR Fundamentals Guide  - Page 82

Document processing Medium speed: Process 1,000 to 1,500 documents per minute. These machines usually use waveform recognition, frequently with dual or hybrid read. High speed: Process 2,000 or more documents per minute. These machines are typically found in larger banks, clearinghouses, processing centers, etc. They generally use matrix or dual read technology. Paper handling by reader sorters Reader sorters are designed to handle batches of check documents of mixed sizes, weights, and conditions (pieces torn away, creased, etc.), at high speed. This may result in reader sorters handling documents somewhat roughly. Documents may undergo from 10 to 20 separate passes through reader sorters. If the leading edge of a check is damaged slightly in one of these passes, repeated sorting can increase the damage until the document no longer feeds properly. Because of the high cost of handling misfeeds, check processors limit the types of paper that can be used to print MICR documents. Reader sorters typically use the following mechanisms to handle MICR documents. Hopper jogger The hopper jogger is usually least stressful to documents. It vibrates the documents to aid in aligning and separating them. Separator A picker belt forces the first document forward, while a restraint system retards the remainder of the documents. The initial shearing force and acceleration applied to the document is generally followed by a deceleration as the document is fed into a multiple-document detection station. If the forces are too extreme, or the document is too weak, the document could collapse, causing wrinkles. Wrinkles normally appear in the Amount field. 5-8 Generic MICR Fundamentals Guide