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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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