Narrow Journal Paper Option in a 4680 Point-of-Sale Printer

Narrow Journal Paper Option in a 4680 Point-of-Sale Printer

       The 4680 Point-of-Sale printer has a journal station
which consists of a take-up spool (to wind up the journal receipt
after printing) driven by a stepper motor, and an emitter system
which measures the linear motion of the paper (to ensure that the
paper is feeding - a security requirement - and to measure when to
turn the stepper motor off).

      The design width of the paper path is 2.75", but could be
reduced to a lesser dimension by replacing the anti-friction pad in
the bottom of the journal paper bucket with a new pad incorporating a
guide surface to keep the paper supply justified to the left edge of
the existing paper bucket.  The take-up spool is based upon the left
edge of the paper, and could accommodate a narrower paper supply. The
emitter system to measure paper movement uses a small O-ring in the
center of an emitter shaft to insure positive contact between the
paper and the emitter shaft, effectively limiting the minimum width
of the paper to approximately 1.5".

      With a narrow paper supply, the system would need to know the
actual width of the paper to prevent printing on the platen and
losing information.  Two methods of controlling the print width are
offered below.

      Electronics: By the use of a specific print command unique to
the narrow paper, the 4680 Store Controller would send only the
information that could be printed on the narrow paper.  The
control...