Aligner; Read/Write Heads; Item Numbering And Endorsing Stations; Microfilm Or Image Capture Unit - Xerox 6100BD - Phaser Color Laser Printer Fundamentals

Aligner

Read/write heads

Item numbering and endorsing stations

Microfilm or image capture unit

Generic MICR Fundamentals Guide
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.
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.
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.
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.
Document processing
5-9