Figure 3-63.-Principles of operation.
operation, air that is drawn through these holes
a lever. When the lever is operated, a group of
causes a difference in pressure that causes the
original to follow the tracing belt and the print
to follow the printer belt. Thus, the original and
print are separated and directed in different
directions. The original moves out of the machine,
and the print moves into the developing section
where ammonia vapors develop those areas that
were not desensitized. It should be noted that it
is possible, should the need arise, to direct both
the original and the print out of the machine
before they go to the developing section. All that
is necessary to accomplish this is to operate
fingers is extended. These fingers cause the print
to be directed out of the machine, along with the
original. One instance in which it is desirable to
remove the print is when the sensitized paper is
coated on both sides. In this instance, the second
side will be exposed before any developing takes
place.
DEVELOPING SECTION.— The developing
section consists of a perforated stainless steel
developing tank. This tank is continuously
supplied with ammonia from an ammonia supply
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