IMPROVEMENTS ON PLATE PRINTING PRESS WITH APPARATUS FOR LAYING ON AND THROWING OFF THE SHEET, FOR MONOCHROMATIC OR SIMULTANEOUS POLYCHROMATIC PRINT.
Year: 1883

page_text: LETTERS PATENT to Hermann Luetke of Berlin in Kingdom of Prussia,
Empire of Germany for an Invention of IMPROVEMENTS ON PLATE PRINTING
PRESS WITH APPARATUS FOR LAYING ON AND THROWING OFF THE SHEET,
FOR MONOCHROMATIC OR SIMULTANEOUS POLYCHROMATIC PRINT.
PROVISIONAL SPECIFICATION left by the said Hermann Luetke at the
Office of the Commissioners of Patents on the 6th February 1883.
HERMANN LUETKE of Berlin in Kingdom of Prussia, Empire of Germany,
"IMPROVEMENTS ON PLATE PRINTING PRESS WITH APPARATUS FOR LAYING ON
AND THROWING OFF THE SHEET FOR MONOCHROMATIC OR SIMULTANEOUS POLY-
CHROMATIC PRINT
"
This invention relates to platen machines for monochromatic and polychromatic
printing and according thereto the inking rollers travel in a path around a bed
plate fixed to a stationary hollow shaft, and each inking roller is guided to its
appropriate ink duct over an ink distributing disc and over the form in such a
manner that for polychromatic work the respective inking rollers receive only the
proper color of ink intended for them and with this ink, roll over the corresponding
ink distributing disc and form, and the rollers intended for one color do not touch
the duct or the ink distributing disc or the form intended for another color. By
the above stated arrangement either in one machine or by two or more suitably
connected machines, three four or more colours can be printed. The guiding of the
rollers is so effected that the form or forms can be placed above or upon or above
and upon the bed plate and so that the forms can be inked separately or simul-
taneously. When two, three or more such machines are used together according to the
number of colors required they are connected in such a manner that the self acting
apparatus for laying on the sheet belonging to the second machine takes the sheet
from the first machine and so on, each successive machine receiving the sheet from
[Price 6d1

page_text: the preceding machine. The side frames are connected by a top frame and by the
hollow shaft and the base plate. Through the hollow shaft extends another shaft
parallel to which are two short shafts having their bearings in the side frames.
Each of these shafts carries two toothed wheels. One of these shafts on being
rotated by any suitable means drives by one of its wheels the shaft that extends
through the hollow shaft, which in turn through suitable gear drives the other
short shaft.
On the stationary hollow shaft are two toothed wheels each in gear with one of
those on the short shafts so as to be driven thereby. These toothed wheels are
fast to a couple of slotted plates having radial slots that contain the bearings of the
inking rollers as well as cam grooves to actuate levers for working the apparatus
for laying on and throwing off the sheets.
By the above described arrangement the inking rollers are carried around the
bed plate and guided to the ink duct or ducts over the distributing disc spreader or
brayer and over the form. Each of the slotted plates is provided with as many
slots as there are inking rollers. In the said slots the cubiform brasses or bearings
of the rollers are so arranged that they can be moved by radial guide rods operated
by stationary cams or grooves attached to the stationary shaft. The platen is
operated through suitable rods levers and links by a couple of cams on the shaft
already mentioned as extending through the hollow shaft. The sliding carriage
used for laying on and throwing off the sheet is connected by links to levers
pivotted to the side frames and having pins or projections extending into cam
grooves in the slotted plates that carry the printing roller bearings, the arrange-
ment being such that after the rollers have passed, the said levers draw forward
the sliding carriage for printing, hold it, and after the sheet has been thrown off,
move the said carriage back again to its former position.
A machine according to my invention may have only one ink duct and one ink
distributing disc or brayer in which case it will do only monochromatic printing.
Or the machine may be so arranged that some of the inking rollers will ink part of
the form, others other parts, or some one form and some another.
The plates in which are the cam grooves for operating the rods connected to the
roller bearings are both provided with dove-tail holes fitting corresponding pro-
jections on the hollow shaft, thus the said two plates can be firmly secured to the
shaft though in such a manner that they can be easily removed. According to the
variety of colors to be printed and the different movements to be imparted to the
inking rollers, additional cam plates can be provided.
Each roller bearing is provided with a screw whereby it is attached to its
actuating rod in such a manner as to allow of adjustment.
If one machine is to print several colors it must be provided with the appropriate
number of inking rollers, ink ducts, and distributing discs or brayers

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Hermann Luetke in the Great Seal Patent Office on the 3rd
August 1883.
HERMANN LUETKE of Berlin in Kingdom of Prussia, Empire of Germany
IMPROVEMENTS IN PLATE PRINTING PRESS WITH APPARATUS FOR LAYING ON AND
THROWING OFF THE SHEET, FOR MONOCHROMATIC OR SIMULTANEOUS POLYCHRO-
MATIC PRINT
This Invention relates to platen machines for monochromatic and polychromatic
printing and according thereto the inking rollers travel in a path around a bed
plate fixed to a stationary hollow shaft and each inking roller is guided to its
appropriate ink duct over an ink distributing disc and over the form in such a
manner that for polychromatic work the respective inking rollers receive only the
proper color or ink intended for them and with this ink roll over the corresponding
ink distributing disc and form and the rollers intended for one color do not touch
the duct or the ink distributing disc or the form intended for another color. By
the above stated arrangement either in one machine or by two or more suitably
connected machines, three four or more colors can be printed. The guiding of the
rollers is so effected that the form or forms can be placed above or below or above
and below the bed plate and so that the forms can be inked separately or simul-
taneously when two three or more such machines are used together according to
the number of colors required they are connected in such a manner that the self-
acting apparatus for laying on the sheet belonging to the second machine takes the
sheet from the first machine and so on, each successive machine receiving the sheet
from the preceding machine. Figure 1 is an elevation, Figure 2 a side view,
Figure 3 and 4 are details of my improved machine. Figure 5 is the side view of
two machines coupled together.
The side frames a are connected by a top frame b and by the hollow shaft c and
the base plate d. Through the hollow shaft c extends another shaft i parallel to
which are two short shafts ff' having their bearings in the side frames a a¹-Each
of these shafts ƒ f¹ carries two toothed wheels or pinions g g and g¹ g¹.
One of these shafts f on being rotated by any suitable means, drives by one of
its wheels g the wheel on the shaft i that extends through the hollow shaft c which
in turn, through suitable gear h¹ g' drives the other short shaft f¹.
On the stationary hollow shaft c are two toothed wheels m m' each in gear with
one of those on the short shafts f f¹ so as to be driven thereby. These toothed
wheels m m' are arranged on the shaft c and are fastened to a couple of slotted
plates or discs kk having radial slots s contain the bearings of the inking
rollers p as well as cam grooves e to actuate levers xx¹ for operating the slide q.
By the above described arrangement the inking rollers p are carried around the
bed plate d and guided to the ink trough duct or ducts z over the distributing
disc spreader or brayer y and over the form Fig: 2 and 3.
Each of the slotted plates or discs / ² is provided with as many slots & as there
are inking rollers. Ten such said slots and rollers are shown in the accompanying
drawings.
8
In the said slots s the cubiform brasses or bearings of the rollers p (Fig: 4) are
so arranged that they can be moved by radial pins t operated by stationary cams
or discs provided with suitable grooves v v¹ and attached to the stationary shaft c
so that the guide pins t by each revolution of the discs kk' are guided in the said
cam grooves vv in order to assure the correct spreading of the ink and inking of
the rollers (Fig 3). The platen is operated through suitable rods levers and links

page_text: by a couple of cams n n¹ on the shaft i already mentioned as extending through
the hollow shaft. The sliding carriage q is for laying on and throwing off the sheet
connected by links w to levers xx pivotted to the side frames a a¹ and having
pins or projections extending into cam grooves e in the slotted plates kk' that
carry the printing roller bearings, the arrangement being such that after the
rollers P have passed, the said levers draw forward the sliding carriage q for printing,
hold it, and after the sheet has been thrown off, move the said carriage back again
to its former position. A machine according to my invention (Fig: 2) may have
only one ink trough or duct z and one ink distributing disc or brayer y in which
case it will do only monochromatic printing, or the machine may be so arranged
that some of the inking rollers will ink part of the form, others other parts, or
some one form, and some another according to the position of the groove Fig: 3-
The plates or discs in which are the cam grooves vv for operating the pins
connected to the roller bearings are of like form and are both provided with dove-
tail holes or recesses fitting corresponding projections on the hollow shaft c thus the
said two plates can be firmly secured to the shaft c, though in such a manner
that they can be easily removed. According to the variety of colors to be printed
and the different movements to be imparted to the inking rollers, additional cam
plates or discs with corresponding cam groove or longer or shorter guide pins can
be provided Fig 4.-Each roller bearing is provided with a screw whereby it is
attached to its actuating pin or rod t and is arranged in such a manner as to allow
of the adjustment of the said roller. If it is desired to simultaneously print in
several colors, the following arrangements can be made.
A, The same press can be provided with several inking troughs or ducts z z¹³
and spreading plates y y¹ y² or
B, Two or more machines can be coupled together.
In the first case (Fig: 5 A) for instance the first three rollers p are provided with
black ink from the trough or duct and spread the same on y; the next three
rollers pare so guided in a lower or higher groove v¹ that they do not come in
contact with or y but take the second color, for instance red, from the trough or
duct and spread the same on y¹ whereas the last 4 rollers do not come in contact
with the above named ducts or troughs or spreading plates, but take the third
color, for instance blue, from the duct or trough 22 and spread the same on the
plate y²
In order to avoid having to make the machine too large two or more like
machines can be coupled together as shown in Fig: 5 A and B. In this case the
sheet removing device can be omitted and attached to the last machine in place of
which angular wedge like stops q¹ are employed which serve to hold the frame for
the paper to be printed.
If the sheet has now been printed with the first color the levers x x¹ transport
the frame to which the sheet is attached to the right and transfer the same to the
second machine, the second to the third machine in order that the sheet may be
further provided with ink whilst the slide or carriage q of the first machine returns
to its original position so as to begin its operation afresh.
Having now described my said invention and the manner in which the same is
to or may be carried into effect I wish it to be understood that what I claim and
desire to secure by Letters Patent is :-
On Platen printing machines for monochromatic or polychromatic printing.—
1. The arrangement and employment of the base plate d which is let into a fixed
shaft in such manner.
a, that the inking rollers p are carried by the discs or plates k k¹ in a circular
course around the said base plated to the inking troughs or ducts z and also
over the spreading plates or braying surfaces y and above the form in order
to receive their requisite ink and
b, that the upper surface of the base plate & can be employed as platen or form
(Fig : 1, 2, and 3) substantially as described and shown in the accompanying

page_text: 2-The simultaneous employment of the discs or plates kk which serve to carry
the rollers p, for operating the two levers ¹ which are guided in the cam grooves e
of the said discs or plates kk so as to guide the slide q which serves to lay on,
print and remove the paper substantially as described and shown in the accompanying
drawings.
3. The general construction arrangement and employment of the parts of my
improved platen press for monochromatic or polychromatic printing substantially as
described and shown in the accompanying drawings.
In witness whereof I the said Hermann Luetke have hereunto set my hand
and seal this First day of August in the year of Our Lord One thousand eight
hundred and eighty three.
Witnesses
HUGO KNOBLAUCH
KARL ARNOLD.
HERMAN LUETKE (L.S.)