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In a machine for sorting documents a very simple method is provided for identifying these documents provided they have given fixed widths different from each other.
English (United States)
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In a machine for sorting documents a very simple method is provided for
identifying these documents provided they have given fixed widths different from
Let's assume three different types of rectangular documents are provided: a
check having a width 1, a stub having a width L, and a stub with an m over n
removed portion (see figure). These documents are first stacked and then
automatically picked one at a time and transported over a fixed path to be
processed differently depending upon their specific identity.
An arrangement of four sensors, e.g., photoelectric cells C1,
C2, C3 and C4, located as shown in the figure, is provided along the
document transport path. Their respective positions are based on the
relative dimensions of the documents, with the following assumptions:
Additional logic is also provided which detects any cell coverage by a
document through the logic, wherein C=1 is used to indicate that a given cell C is
As soon as a document leading edge reaches and hides C4, then C1 and C2
are under consideration. If C1.C2=1, then the document is a stub. If C1+C2=1,
then the document is a check.
If a stub has just been identified, then as soon as C3=1, C1 is considered. If
C1=1, the stub is complete; if C1=0 then the stub m times n portion has been
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