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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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