Xerox 6180N Generic MICR Fundamentals Guide - Page 83
and endorsing stations. - no scan options
UPC - 095205425307
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Aligner Document processing Within the aligner, a series of wheels drive the bottom edge of the document toward the back side of the reader sorter so that the MICR line is in a predictable location. The wheels have a series of plastic fingers that make contact with the back side of the document and force it against the aligner drum. Read/write heads A wheel with a very short nap bristle brush on its surface presses the document first against the write head, then against the read head. In order to optimize the pressures for handling debossed characters and folded documents, the head may be positioned at a sharp angle. Material can be scraped off the document and spread out by the bristled wheel pressing on the paper. If the wheel is worn, the spreading or scraping processes could be uneven, resulting in a lump of material being redeposited on a later document. NOTE: This process is typical only of IBM 3890 matrix reader heads. Other reader sorters may differ in several details. Item numbering and endorsing stations After the document is read, belts carry it through item numbering and endorsing stations. If certain plates or document guides in these stations are misaligned, document abrasion could occur here. Microfilm or image capture unit Optionally, the document may enter a microfilm or image scanning unit. In the IBM 3890, the document is held to a plate by a vacuum and driven by a toothed belt that is in the center of the plate. The edges of the plate, the belt-slot, or the teeth may be sharp enough to scrape the document surface. Generic MICR Fundamentals Guide 5-9