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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.
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