|
Crude
wooden hand presses allowed the printer
to transfer ink to paper. These old
slow presses could only print 300 to
500 printed sheets per day. Over time,
power-driven machines could produce
the same number of printed sheets in
a few minutes (in newspaper printing,
a few seconds). The old wooded presses
used a torsion screw for making the
impression and was provided with a clever
mechanical arrangement devised to provide
the proper pressure on the form. Further
changes in press construction came about
slowly until the first all-metal press
was built by the Earl of Stanhope early
in the 19th century. This press still
used a screw device, but less exertion
was required to force the impres sion
on the sheet. Application of the principle
of the lever to the iron press resulted
in several presses which came into common
use.
The
idea of the printing press, as conceived
by Gutenberg, reached its highest development
by the late 1700's. The job, or platen,
press is the direct descendant of a
machine perfected in 1858 by George
P. Gordon of New York. In this machine
the platen and form are turned on edge.
In other presses, both the platen and
the bed move with a sort of clamshell
action.
The
cylinder press was first conceived by
William Nicholson of London who secured
patents in 1790 but was unable to perfect
a working model. Within time, however;
the design for a steam-powered cylinder
press was perfected and was capable
of printing 1,100 sheets per hour.
Shortly
after the development of the cylinder
press, D. Napier, an Englishman, invented
a press using grippers for picking up
the sheet from the paper table and holding
it while the sheet received the impression.
While numerous other improvements have
been added throughout the years, the
flatbed cylinder press, except for the
vertical press, is practically obsolete.
In
1847, Richard Hoe perfected the first
rotary press with the type actually
carried on the cylinder. An American,
William Bullock developed the first
web press, in 1856. These early web
presses could deliver 15,000 signatures
per hour and printed both sides. The
name Hoe Press is synonymous among the
newspaper industry.
Since
that time, newspaper presses have been
developed to a high state of efficiency
which, by duplicating plate and units,
has allowed newspapers to be printed
and delivered at the rate of 160,000
per hour.
|