IMPROVEMENTS IN PRINTING AND ROLLING MACHINES
Year: 1881

page_text: LETTERS PATENT to Friedrich Hermann Felix Engel, Civil Engineer and
Patent Agent, in the City of Hamburg, Germany, for an Invention of
"IMPROVEMENTS IN PRINTING AND ROLLING MACHINES." A communication
from Ferdinand Schlotke and Louis Hesse, both of Hamburg, in the German
Empire
PROVISIONAL SPECIFICATION left by the said Friedrich Hermann Felix
Engel at the Office of the Commissioners of Patents on the 20th June
1881.
FRIEDRICH HERMANN FELIX ENGEL, Civil Engineer and Patent Agent, in the
City of Hamburg, Germany. IMPROVEMENTS IN PRINTING AND ROLLING
MACHINES." A communication from Ferdinand Schlotke and Louis Hesse, both
of Hamburg, in the German Empire.
This Invention relates to improvements in the construction of printing and
rolling machines constructed for the printing of both sides of a sheet of paper
simultaneously while passing through the rollers of the machine, Letters Patent
for which were granted the 25th day of June 1879, No. 2547. The purpose of
these present improvements is to enable the machine to produce with one
revolution of the rollers two sheets of double printed paper instead of one sheet as
was formerly the case.
The rollers, which must be made of somewhat larger diameter than before, are
each furnished with two longitudinal grooves along the outer surface arranged
opposite each other, and instead of one prepared zinc plate two such plates are
placed on each roller, and are with their ends fastened to attachments arranged
within the grooves of the rollers. Of these zinc plates one plate of the one roller
forms a pair with one plate of the other roller, and such a pair of plates corre-
sponds in position during operation or action of the machine.
To cach pair of these plates the print of the two sides of a sheet of paper is
transferred by passing two sheets of papers, each furnished with the imprint of one
side and placed in axact register one against the other with its unprinted sides
together through the revolving rollers, whilst the imprint on the two sheets is fresh

page_text: or wet. By an analogous manipulation the other pair of prepared zinc plates is
furnished with the print of both sides of another sheet of paper.
Each roller of the machine is furnished with a wetting and printing-ink distri-
buting and inking roller apparatus of common construction for printing machines,
to bring printing-ink on to the prepared surface of the plates during the action of
the machine.
During one revolution of the rollers two sheets of papers must be fed on to the
rollers, which will both be furnished with an imprint on both sides, and will
likewise be rolled or glazed on both sides through the pressing action of the rollers.
Or an endless band of paper may be passed through the rollers, which will receive
imprints on both sides in the required distance, to allow the band to be cut in
sheets of the desired dimensions.
Instead of letter print any other print, as drawings or designs, and so forth,
may be brought on to the prepared printing plates, and be afterwards produced in
double print by this machine.
]

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Friedrich Hermann Felix Engel in the Great Seal Patent Office
on the 20th December 1881.
FRIEDRICH HERMANN FELIX ENGEL, Civil Engineer and Patent Agent, in the
City of Hamburg, Germany. "IMPROVEMENTS IN PRINTING AND ROLLING
MACHINES." A communication from Ferdinand Schlotke and Louis Hesse, both
of Hamburg, in the German Empire.
This Invention relates to improvements in the construction of printing and
rolling machines constructed for the printing of both sides of a sheet of paper
simultaneously while passing through the rollers of the machine, Letters Patent for
which was granted the 25th day of June 1879, No. 2517. The purpose of these
present improvements is to enable the machine to produce with one revolution of
the rollers two sheets of double printed paper instead of one sheet, as was formally
the case.
The rollers, which must be made of somewhat larger diameter than
before, are each furnished with two longitudinal grooves along the outer surface
arranged opposite each other, and instead of one prepared zinc plate two such plates
are placed on each roller, and are fastened by their ends to attachments arranged
within the grooves of the rollers. Of these zinc plates one plato of the one roller
forms a pair with one plate of the other roller, and such a pair of plates corresponds
in position during operation or action of the machine. To each pair of these plates
the print of the two sides of a sheet of paper is transferred by passing two sheets
of paper, each furnished with the imprint of one side and placed in exact register
one against the other, with its unprinted sides together through the revolving
rollers, whilst the imprint on the two sheets is fresh or wet. By an analogous
manipulation the other pair of prepared zinc plates is furnished with the print of
both sides of another sheet of paper. Each roller of the machine is furnished with
a wetting and printing-ink distributing and inking roller apparatus of common
construction for printing machines, to bring printing ink on to the prepared surface
of the plates during the action of the machine.
During one revolution of the rollers two sheets of paper must be fed on to the
rollers, which will both be furnished with an imprint on both sides and will
likewise be rolled or glazed on both sides through the pressing action of the rollers.
Or an endless band of paper may be passed through the rollers, which will receive
imprints on both sides at the required distance to allow the band to be cut in
sheets of the desired dimensions.
Instead of letter print any other print, as drawings or designs, and so forth, may
be brought on to the prepared printing plates, and be afterwards produced in
double print by this machine.
In the accompanying Drawing is represented by vertical section a construction
according to this improved printing and rolling machine. A and B are the rollers
which revolve against each other by means of gearing carried on the axles of the
said rollers and driven from a motor; 8, 8, are the longitudinal grooves reaching
nearly from end to end of each roller, and arranged opposite and relatively to each
other; m, m³, are the prepared zinc plates stretched over or laid on the surface of
each roller, and fastened by means by means of screw-jacks or clamps i and springs h
between grooves 8, 8.
As will be understood from the Drawing printing-plates m, m, and m³, m²,
correspond to each other, and consequently during one revolution both pairs of
plates produce double imprints.
The other parts of the machine are of common construction as for printing

page_text: machines generally; L is the laying on table for the blank paper; G is the
printing-ink mechanism; r, r, the wetting rollers, and D is the taking off roller.
For applying the machine as a rolling or glazing machine, the printing works
and inking rollers are removed, for which purpose these parts are arranged movably
on the machine frame.
Having now described the nature and particulars of the said Invention, I
claim,―
The construction of each roller of double printing and rolling machines with
two longitudinal grooves 8, 8, for the fastening of two plates of prepared sheets of
zinc upon the surface of each roller, for the purpose of producing four imprints
or two double sided imprints during one revolution of the rollers, substantially as
and for the purpose set forth, and as described and explained in reference to and
as shown by the accompanying Drawing.
In witness whereof, I, the said Friedrich Hermann Felix Engel, have hereunto
set my hand and seal, this Twelfth day of December, in the year of our
Lord One thousand eight hundred and eighty-one.