Figure 1-28.TT-48/UG Model 28 floor-mounted KSR
All teletype Model 28 printers use rolls of paper,
which are inserted into the printer through the top. The
paper may be single copy (single ply) or have three
layers of paper and two layers of carbon (5-ply).
Various colors of paper are also available. Usually,
only single-ply yellow is used in meteorological
Figure 1-29.TT-69/UG Model 28 tabletop KSR teleprinter.
Figure 1-30.AN/UGC-20 Model 28 compact KSR
offices. Paper loading instructions are found inside the
printer when the lid is opened.
These teleprinters use inked cloth ribbons, supplied
on a single metal spool. Ribbon routing instructions are
also listed inside the case. When installing a new
ribbon, you must save one of the two used ribbon spools
to attach to the new ribbon. Never reink and reuse old
ribbons. Always replace them when the printing is very
light or the ribbon shows signs of fraying or tearing,
especially around the small metal eyelets near each end
of the ribbon. These eyelets activate the ribbon-
direction-reverse lever inside the teleprinter. If an
eyelet tears loose from the ribbon, the reverse lever is
not activated, and the ribbon advance gears or the
ribbon mounting assembly may be damaged when the
ribbon pulls taut.
Figure 1-31.AN/UGC-25 Model 28 compact RO teleprinter.