AN IMPROVED POLYCOLOUR PRINTING MACHINE
Year: 1877

page_text: LETTERS PATENT to Ambrosius Hugo Schumann and Wilhelm Zelle, of
Leipzig, Germany, for the Invention of "AN IMPROVED POLYCOLOUR
PRINTING MACHINE."
Sealed the 18th April 1878, and dated the 27th October 1877.
PROVISIONAL SPECIFICATION left by the said Ambrosius Hugo Schumann
and Wilhelm Zelle at the Office of the Commissioners of Patents on the 27th
October 1877.
AMBROSIUS HUGO SCHUMANN and WILHELM ZELLE, of Leipzig, Germany.
IMPROVED POLYCOLOUR PRINTING MACHINE."
"AN
This Invention relates to a printing machine by which many-colored pictures
may be produced at a less cost and better than has been practicable heretofore.
No machine hitherto constructed produces a correct print in any variety of colours
and on a large scale. To print pictures with four or five colours it has been necessary
that every sheet should pass from four or five times through a unicolour printing
machine, or two or three times through a bicolour press; therefore, the figures of
different colours very frequently do not precisely fit one in another, the outlines
throw out" or run one in another, and a great many waste prints are produced.
Printed pictures containing more than four or five colors are but rarely met with,
because the printing takes too much time, and such pictures cannot compete with
lithographic printing.
We are aware that attempts have been made to print pictures from two up to
five colours by means of rollers, but scarcely any improvement has been thereby
attained. Circular printing surfaces have great disadvantages. The rollers must be
turned with the utmost precision, otherwise they cannot be used, and it is very
difficult for the steel engraver to work upon round surfaces with the usual tools, and
the calkings must be brought so exactly straight upon the rollers that with delicate
pictures this is a matter of great difficulty. The rollers are so costly, that it is only
with very large editions that roller printing can be made remunerative.
D

page_text: We are also aware that to overcome the difficulties connected with engraving
rollers, it has been attempted to engrave even plates, and to bend them afterwards
into roller form. But the surface of such a roller seldom becomes exactly circular.
A printing machine constructed according to our said Invention will print five
colours in one revolution with straight even plates.
To print a picture containing five colours the sheet has to pass the machine once
only, instead of three or five times, as heretofore; therefore, the colours will be exactly
in the desired position, and undesirable differences of colours can scarcely occur. The
press produces a good print without any waste, and much, more work is done within
a given time than by an unicolour press. The latter prints 7 to 8,000 sheets per day,
in one colour, or if in five colours in five days. Our said machine will deliver the same
number of sheets printed in 5 colours in two days. The difference in our favor will
therefore be about in the proportion of 2 to 5. The unicolour press requires the
register to be made 5 times, and our said machine only once.
The advantage of our said improved machine will be still more apparent if the
sheet is twice passed through the same. If we print two sets of colours each one
upon the other, we receive 25 mixed colours besides the 10 original ones; and every
one of these 35 colours may be still further varied by different shades. By such means
a splendid variety of colours may be obtained. To print 8,000 sheets in 35 colours,
every sheet requires to pass the machine only twice; this work will be done in 2
days, while with a unicolour machine it would take at least 30 days, besides the loss
of time in making the register.
Our said machine offers another considerable advantage, that is so say, all printers
have their plant arranged for even printing plates, and all these plates may be used
with our machine. The plates may be arranged conveniently to make them harmo-
nize. All means for multiplication are at hand. One plate may be made into two
or three.
In addition to all these great improvements our said machine is simple in its
construction, and smaller than the existing bicolour printing machines. It may also
be constructed at a less cost.
Our said machine is constructed as follows, that is to say:-A pentagonal frame
turns around a shaft, and works against a paper cylinder bearing the sheets which
are to receive the picture. The periphery of this cylinder is equal to one side of the
said pentagonal frame. The said cylinder turns excentrically. The pentagonal
frame and the cylinder are geared together. During the rotation of the said frame
the periphery of the said cylinder, owing to the excentricity, is fully pressed against
every side of the frame, and thus the printing plates, which are screwed upon the 5
sides of the frame, print their pictures upon the sheet in one revolution of the
frame, the cylinder in the same time making 5 revolutions.
The pentagonal frame being in gear with the cylinder their speed will be irregular,
because the angles of the pentagon will always be more in gear with the cylinder
than the flat sides, the speed thus will alternately increase and decrease as the angles
approach to or withdraw from the cylinder.
To counteract this irregular speed we have provided in connection with the said
pentagon two excentric toothed wheels, which are in gear in the same irregular
proportion as the speed of the pentagon and cylinder is irregular. The same effect
may also be obtained by placing a second excentric cylinder at the side of and in
gear with the first, and counteracting the irregular speed by the opposite excentricity
of the said second cylinder.
The five printing plates screwed upon the 5 sides of the said frame receive their
inks or colors from as many color boxes by interposition of several rollers, which we
call color rollers, lever rollers, doctor rollers, and rubbing and inking rollers. The
colour rollers take the colour immediately from the box, the lever rollers receive the
colour from the colour rollers, and transfer the same upon the doctor rollers; from
these it is taken away by the inking rollers, which ink the plates. The rubbing
rollers serve to better and equally distribute the color upon the surface of the rollers,
which is essential in all mechanical presses.

page_text: The said colour boxes and rollers may be arranged in any convenient manner.
We propose two arrangements; that is to say, the colour boxes and colour and lever
rollers may be placed underneath the revolving pentagonal frame or above the
same. In the first arrangement the doctor rollers are placed in the 5 corners of the
pentagonal frame, and on its shaft each roller bears a toothed wheel which gears
into another toothed wheel which is placed upon the main shaft, but does not turn
with the same. By this gearing the doctor rollers are turned when the pentagonal
frame turns. The doctor rollers also receive a sidewise to-and-fro motion, in order
that the colour may be equally rubbed upon the rollers by the adjacent rubbing
rollers.
The inking rollers have small wheels upon their shafts; these wheels run upon
rails, which are arranged on both sides of the printing plates. Each rail has a slot,
and the distance between the slots of each pair of rails is different from that of
another printing plate. The wheels of the inking rollers only fit into the slots of
the rails of the corresponding plate. By these means the inking rollers can only
touch the plate provided for their corresponding colour.
The rails bear projections which press the lever rollers down upon the colour
rollers, and by these means the latter get their colour. The lever rollers are then
lifted again by a spring. The colour rollers are kept in a rotary motion by two rods
and an excentric worked by the driving shaft.
In the said second arrangement the doctor rollers are put immediately upon the.
inking rollers, and the lever rollers upon the doctor rollers. The shafts of the two
latter rollers est in a fork, and may be lifted so much that the lever rollers touch
the colour rollers of the colour boxes, which are fixed in an arch-like frame above the
turning pentagonal frame. The colour rollers are operated by mechanism similar to
that herein-before described, by a rod attached to the paper cylinder and dise
bearing lever arms, working upon pawls, and stopping wheels upon the shafts of the
color rollers.
The paper cylinder we use is that known as "Meyer's" cylinder in a printing
press, but with our press it turns excentrically, and the prongs open and close only
after the fifth revolution of the cylinder.
A disc, part of which is cut out, is placed upon the main shaft of the pentagon.
A sheave, placed upon one arm of a lever rod, rises into the opening of the said disc
at every revolution of the pentagon; the other arm of this lever rod will therefore
sink, and the table laid upon that end descends and feeds a new sheet of paper to
the cylinder. One revolution of the pentagon being equal to five revolutions of the
cylinder, the prongs of the latter will open after each revolution of the pentagonal
frame and catch a new sheet. The sheets may be printed on both sides, the points
being dressed as in an ordinary printing machine.
Instead of a pentagonal frame for five colours, the frame may be adapted for any
other number of colours upon the same principle.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Ambrosius Hugo Schumann and Wilhelm Zelle in the Great Seal
Patent Office on the 27th April 1878.
AMBROSIUS HUGO SCHUMANN and WILHELM ZELLE, of Leipzig, Germany.
IMPROVED POLYCOLOUR PRINTING MACHINE."
« AN
This Invention relates to a printing machine by which manycolored pictures
may be produced at a less cost and more perfect than has heretofore been
practicable.
Machines hitherto constructed for this pupose will not produce a correct print or
impression in a variety of colours, and on a large scale. To print pictures with four
or five colours, it has been necessary that every sheet should pass four or five times
through a unicolour printing press, or two or three times through a bicolour press.
Therefore the figures of different colours very frequently do not register or accurately
fit one in another, the outlines "throw out" or run one in another, and a great inany
waste prints are produced.
Printed pictures containing more than four or five colours are but rarely met with,
because the printing takes too much time, and such pictures cannot compete with
lithographs.
We are aware that attempts have been made to print pictures with from two to
five colours by means of rollers, but scarcely any improvement has been thereby
attained. Circular printing surfaces have great disadvantages. The rollers must
be turned with the utmost precision, otherwise they cannot be used, and it is very
difficult for a steel engraver to work upon round surfaces with his ordinary tools,
and the calkings must be brought so exactly straight upon the rollers, that with
delicate pictures this is a matter of great difficulty. The rollers are so costly that
it is only with very large editions that roller printing can be made remunerative.
We are also aware that to overcome the difficulties connected with engraving
rollers, it has been attempted to engrave plates, and to bend them afterwards into
'roller form. But the surface of such a roller seldom becomes exactly circular.
A printing machine constructed according to our said Invention will print fine
colours in one revolution with straight even plates.
To print a picture in five colours, the sheet has to pass through the said machine
once only, instead of five times as heretofore. Therefore the colours will register or
be exactly in the desired position, and undesirable differences of colours can scarcely
occur. The said press produces a good print or impression without any waste, and
much more work may be done by it within a given time than by an unicolour press.
The latter will print 8,000 sheets per day in one colour, or if in five colours in five
days. Our said Invention will deliver the same number of printed sheets in 5
colours in two days. The difference in our favor will therefore be about in the
proportion of 2 to 5. The unicolour press requires the register to be made five
times, and our said machine only once.
The advantage of our improved machine will be still more apparent if the sheet
is twice passed through the same. If we print two sets of five colours, each one
upon the other, we receive twenty-five mixed colours besides the ten original ones;
and every one of these 35 colours may be still further varied by different shades.
By these means a splendid variety of colours may be obtained. To print 8,000
sheets in 35 colours, every sheet requires to pass the machine only twice; this work
will be done in from two to four days, while with a unicolour machine it would
take at least thirty days, besides the loss of time in making the register.
Our said machine offers another important advantage, that is to say, all printers
have their plant arranged for even printing plates, and all these plates may be used
with our machine. The said plates may be arranged conveniently to make them
harmonize, and, means of multiplication being at hand, one plate may be made into
two or three.

page_text: Moreover, our said machine is simple in its construction, and smaller than the
existing bicolour printing machines. It may also be constructed at a moderate cost.
The construction of our said machine is illustrated in Figure 1 of the accom-
panying Drawings. A pentagonal frame P turns on a shaft and works against a
paper cylinder C bearing the sheets which are to receive the picture. The periphery
of this cylinder is equal to one side of the said pentagonal frame. The said cylinder
turns excentrically. The pentagonal frame P and the cylinder C are geared together.
During the rotation of the said frame P, the periphery of the said cylinder C, owing
to its excentricity, is fully pressed against every side of the frame, and thus the
printing plates which are screwed upon the five sides of the frame, print their
pictures upon the sheet in one revolution of the frame, the said cylinder in the same
time making five revolutions.
If we divide one side of the pentagonal frame P and the periphery of the paper
cylinder C into equal parts, we receive the corresponding points 1 and a, 2 and b,
3 and c, and so on. If we then describe circles from A, the centre of the pentagon
through the points 1, 2, 3, and so forth, towards the centre line B, and if we connect
the resulting partition points upon this line with the dividing points a, b, c, d,
and so forth, the centre common to these connecting circles will become the centre of
motion of the paper cylinder C.
The pentagonal frame P being in gear with the cylinder C, the latter will press
against the frame as a straight line up to the point 3, and the following scale will
It will thereby be evident that the paper cylinder C, by reason of its excentricity
will be kept in continuous and equal contact with the sides of the pentagonal frame
The frame P being in gear with the cylinder, the speed of the said frame and
cylinder P, C, must be irregular, because the largest radius of the pentagon will
always coincide with the shortest radius of the cylinder C; the speed of the latter
will thus alternately increase and decrease as the corners of the frame P will approach
or recede from the cylinder C.
To counteract this irregular speed various arrangements of mechanisms may be
employed. A second excentric cylinder may be placed at the side of the paper
cylinder C, and in gear with the same, counteracting the irregular speed by the
opposite excentricity of the said second cylinder.
One arrangement, as shewn in Figures 1, 3, 4, and 5, consists of the two excentric
oval toothed wheels Q, which are in gear in irregular proportion corresponding with
the irregular speed of the cylinder. The lower wheel Q, mounted on the shaft w,
receives motion from a pulley driven by any suitable motor. This lower wheel Q
imparts motion to the upper excentric wheel mounted on the shaft t, the same
shaft bearing the pinion G in gear with the cogged wheel E, mounted on the main
shaft W of the pentagonal frame P.
When the frame P is in the position indicated by Figures 1 and 3, working
against the cylinder C with the middle of a plate, the speed of rotation of the frame
and cylinder P, C, will be as 1 to 3; when, however, the corners of the frame P are in
gear with the cylinder C the speed will be as 1 to 7. This irregular speed is
counteracted by the two excentric gear wheels Q, which are in gear in the pro-
portion of 1 to 4, thus transferring to the frame P the same irregular speed of
inotion (first increasing from 1 to 4, and then falling off by 4 to 1) by means of the
gear wheels G and E, the size of these wheels being in the proportion of 1 to 5.
Another arrangement, shewn in Figure 11, consists of the two gear wheels

page_text: ;
and Q, the former having a pentagonal or five-leaved shape, the other fitting to
the angles of this shape. Motion is imparted to the shaft of the wheel Q', and by
the irregular shape of the wheel X. the pentagonal frame P will turn slower when-
ever the corners approach the cylinder C, and faster when the flat sides are working
against the same. By these means the parts P and C are caused to turn against
each other with a regular average speed of 1 to 3.
Figure 3 of the accompanying Drawings represents a front elevation of our said
manycolored printing machine; Figure is a side elevation of the same; Figure 5
is a vertical section of Figure 4.
Figure 8 is a section of the pentagonal frame P, showing one arrangement of the
doctor rollers D, the rubbing rollers d and k, the inking rollers O, and the color
boxes F with the colour rollers f, and the lever rollers H.
•
Figure 2 shows the other arrangement of the colour boxes and the set of different
rollers, as above specified.
Figure 9 shows the five sides of the pentagonal frame P in one plane, with the
slotted rails L and projections 5.
Figure 10 is a plan of the pentagonal frame P and the paper cylinder C. In
Figures 2 to 11 like letters or numbers indicate the same parts. K is the ground
plate bearing the two standards B. The pentagonal frame is mounted on the main
shaft W, turning in suitable bearings provided in the standards B.
The five printing plates are screwed upon the five sides of the said pentagonal
frame P, and during the rotation of the said frame they print their colored pictures
upon the sheet on the paper cylinder C. The said five plates receive their respective
inks or colours from as many colour boxes F by the interposition of colour rollers f,
lever rollers H, doctor rollers D, rubbing rollers d and k, and inking rollers O.
The said colour boxes F and rollers may be arranged in any convenient manner.
We have devised two arrangements, one being shewn in Figures 3, 4, 5, 8. In each
of the 5 corners of the pentagonal frame P a doctor roller D is placed, the shaft of
cach of these doctor rollers D, bearing at one end a toothed wheel J, which gears
with the stationary wheel Z, this wheel being mounted loosely upon the shaft W
and fixed to the standards B. The cogged crown of the said whee! Z is interrupted
by curves (Figure 4), whereby a horizontal to-and-fro motion is imparted to the
wheels J, and accordingly also to the rollers D). The said rollers D receive a rotary
motion of their own by means of the wheels J in gear with the wheel Z, and by
the rotation of the frame P. The five colour boxes are fixed on convenient stands
below the turning frame P, and arranged in equal proximity to the circle described
by the rollers D in the rotation of the frame P. The color contained in the boxes F
is received by the opposite color roller f, which are kept in a turning motion by the
following mechanism. On one end of the shaft a of each color roller f is fixed a
ratchet wheel b, turned by a pawl e, fixed on the lever arm g. This lever arm g
receives a to-and-fro motion by means of the horizontal rod h and an excentric rod i
attached to the shaft w; above and in close proximity to the colour rollers fare
placed the lever rollers H carried by strong springs. Upon the rails of the
turning pentagon P the projections 5 are arranged to press the lever rollers H down
upon the colour rollers f during the rotation of the frame P. Thus the lever rollers H
take sufficient colour from the rollers f, and then they are lifted again by the sup-
porting springs. On the shafts of the rollers H the sheaves 8' are placed in such
distances as correspond to the slots of the rails L, Figures 4 and 9. Whenever
these sheaves 8¹ enter the corresponding slots in the rails L the rollers H are
brought into contact with their doctor rollers D, to which they impart their colour
while they are running freely over the doctor rollers of different colours, because the
sheaves s do not enter the slots of a non-corresponding distance. The colour thus
having been brought from the colour roller f by the lever roller H to the doctor
roller D it is equally distributed thereon, and rubbed all over the surface by the
adjacent rubbing rollers d and by the horizontal to-and-fro motion of the rollers D.
From the said rollers D the color is taken by the inking rollers O, two, three, or
any suitable number of them being arranged for every plate to be colored. The said

page_text: inking rollers are supported with their shafts in the arched frame R above the
turning pentagonal frame P. The shafts of the said rollers O bear sheaves 8, like
the shafts of the rollers H, fitting into the slots of the rails L. The sheaves S of
every inking roller correspond to the slots of the rail of the corresponding plate,
and by these means each of the five plates can only receive its destined colour, while
all other inking rollers of other colours roll freely above the plate on the rails till
they enter the slots of their own corresponding plate. The colour is distributed and
rubbed upon the inking roller O by the rubbing rollers k placed upon every two
of the rollers O, and receiving a horizontal to-and-fro motion by means of the
rails L being alternately higher and lower on the two sides of the plates.
If our said manycolour or multicolour printing machine is destined to work at a
quick rate, for instance to print illustrated newspapers, the rails L may also be
arranged in the form of a toothed wheel as shewn in Figure 11. The slots remain
the same as in Figure 9. By this arrangement the inking rollers offer but slight
resistance to the turning pentagon, and the machine works very easily and
quietly.
The other arrangement which we have devised for the colour boxes and the different
rollers is shewn in Figure 2. Instead of the doctor rollers D disposed in the 5 corners
of the pentagonal frame P, with their wheels turning upon the stationary wheel Z,
the lever rollers H are placed immediately upon the inking rollers O with or
without the interposition of the doctor rollers D. In this construction the wheel Z
is entirely omitted. The colour boxes F are screwed to the arched frame 6, above
the rotating pentagonal frame, while in the former construction they were arranged
below the saine. The said frame 6 rests upon the pillar 7, supported by the ground
plate K, and besides the said frame 6 is supported by the frame R through the
slotted bars 8. In the slots of the said bars 8 are resting the shafts of the doctor
roller D and of the lever rollers H, the said rollers being laid one upon the other, and
upon the inking rollers O.
The colour rollers f of the boxes F are turned by mechanism similar to that in the
first arrangement herein described. On the shaft of the paper cylinder C is mounted
an excentric rod 4, which imparts a to-and-fro motion to the disc 3. Fixed to this
disc are the lever rods 1 bearing in joints the arms 2. The said arms 2 work the
lever arms g and the pawls e, thereby turning the ratchet wheels b on the shafts of
the colour rollers f.
The colour is transferred from the said colour rollers fupon the lever rollers H in
the following manner, that is to say:-The pentagonal frame lifts in the course of its
rotation the inking and rubbing rollers, and thereby raises the doctor and lever
rollers every time a corner of the part P passes below the said rollers. The rollers
D and H are raised in the slots of the bars 8, but the rollers H only touch the
rollers fif a corresponding projection upon the rails L effects the required additional
lift. The colour of every colour box can only be imparted to the respective lever,
doctor, and inking rollers, because in this construction all these rollers remain
stationary and in close connection with each other.
A section of the paper cylinder C is represented in Figure 7. It is constructed
substantially like the cylinder of any other printing press, but with our press it
turns excentrically as above described, and the prongs open and close only after the
fifth revolution of the cylinder; is a small toothed wheel mounted upon the shaft o,
which carries the prongs p; q is a segment mounted upon the shaft r, on the other
end of which the spiral spring x and the worm wheel u are mounted, the latter
being turned by one tooth in every revolution of the cylinder C. After every fifth
revolution of the cylinder C the pivot v catches into the recess of the wheel u, the
spring presses the shaft r forward, the small roller y works upon the excentric Z
and the prongs open; V is a spring with a strap wound around the shaft o,
which closes the prongs again and keeps them closed. The sheet of paper to be
printed is fed by the table T, which after every fifth revolution of the cylinder C
descends upon the latter. This motion of lowering the table is effected by the
following arrangement:-Upon the main shaft W of the pentagonal frame P is

page_text: mounted a disc S with a segment cut out of the same. A lever arm A balanced
upon a shaft conveniently fixed to the standard B carries at one end a sheave U,
upon which the disc S works. When the opening or cut of the disc meets upon the
sheave, the latter rises into the said opening, and the other end of the lever arm A
is lowered as much; upon this other end of the said arm A the table T is resting.
During the rotation of the frame P the cut of the disc S will only once meet upon
the sheave U; the table T accordingly is lowered once in one revolution of P, or
in five revolutions of C, and in consequence a new paper sheet is fed to the cylinder
when the previous one has received the printed picture of the five sides of the
pentagonal frame.
At
The raising and lowering of the table T and the opening and closing of the
prongs may also be effected by another arrangement shewn in Figure 11. In this
arrangement the table may be adjusted to feed the paper and the prongs to catch it,
convenient
not only after every fifth turn of the paper cylinder C, but also after any
number of turns. A wedge-formed piece Z' is placed below the cylinder C.
one end of the said wedge Z' is fixed the sheave 15 running upon the rails 9, which
are screwed to the frame P. The segment q runs upon the sloping surface of Z¹. A
spring 11 presses against the said wedge Z1, and where at convenient distances the
rail 9 is interrupted, the wedge Z' is pressed forward, the segment q turns the
small wheel and the prongs p open. The spring 12 serves to close the prongs
again.
Fixed to the wedge Z¹ is the rod 10 with a joint at 13, and carrying a roller 14
at its upper end; upon this roller rests the table T. Wherever the rail 9 is inter-
rupted and the wedge Z¹ pressed forward, the table T is pulled down by the arm 10
and at the same time the prongs p open to receive the sheet fed by the table.
The sheets may be printed on both sides, the points being dressed as in an
ordinary printing machine.
Instead of a pentagonal frame for five colours, our said Invention may be adapted
for any other number of colours.
Having thus fully described our said Invention and the manner of performing
the same, we wish it understood that we claim in and forming part of a manycolour,
polycolour, or multicolour printing machine, and for the particular purposes above
specified,-
First. The arrangement of five or more even printing plates upon a revolving
pentagonal or polygonal frame, the said plates printing in one turn or revolution
five or more colours upon an excentrically moving paper cylinder, as above set
forth.
Second. The arrangement for counteracting the irregular speed of the revolving
pentagonal frame and of the excentric paper cylinder by means of the oval excentric
gear wheels in connection with the pentagonal frame, as above set forth.
Third. The arrangement for counteracting the irregular speed of the revolving
pentagonal frame, and of the excentric paper cylinder by means of a pentagonal
or five-leaved wheel, and a correspondingly shaped gear wheel in combination with
the pentagonal frame P, as above set forth.
Fourth. The arrangement of the colour boxes with the colour rollers and the lever
rollers below the turning pentagonal frame, and the disposition of the five doctor
rollers in the corners of the said frame, with the gear wheels and the stationary
wheel operating in combination with the revolving pentagonal frame.
Fifth. The mechanism for turning the colour rollers by means of the rods, the
lever arms and the pawls catching into the ratchet wheels, as above set forth.
Sixth. The arrangement of the rails at the sides of the printing plates, with
slots at different distances from the plates and the projections, for effecting the
contact between the lever rollers and colour rollers, as above set forth.
Seventh. The automatic lifting and lowering of the table after every fifth
revolution of the paper cylinder by means of the disc, the lever arm, and the sheave
in combination with a revolving pentagonal frame, as above set forth.
. Eighth. The combination of the inking rollers and the sheaves corresponding to

page_text: the slots of the rails with a pentagonal or polygonal frame, so that every plate
receives its proper ink or colour, as above described.
Ninth. The arrangement of the colour boxes and colour rollers in an arched frame
above the revolving pentagonal frame, as above set forth.
Tenth. The arrangement of the doctor and lever rollers in the slotted bars, as
above set forth.
Eleventh. In a multicolour printing machine the mechanism for turning the colour
rollers by means of the lever rods, with the arms, the disc, and the excentric
rod in combination with a revolving pentagonal frame and excentric paper cylinder,
as above set forth.
Twelfth. The automatic mechanism for opening and closing the prongs of the
paper cylinder, and for lifting and lowering the table after any convenient number
of revolutions, consisting of the rails, the wedge, the lever arm, and the segment,
as above set forth.
Thirteenth. The parts of the said machine constructed and combined as shewn
in the accompanying Drawings, and so operating as to print multicolored or poly-
colored pictures by passing a sheet once or twice through the printing machine, and
producing a great variety of shades of colours by printing two series of colours one
upon the other, as above set forth.
In witness whereof, we, the said Ambrosius Hugo Schumann and Wilhelm
Zelle, have hereunto set our hands and seals, this Fifteenth day of April, in
the year of our Lord One thousand eight hundred and seventy-eight.
AMBROSIUS HUGO SCHUMANN. (L.S.)
WILHELM ZELLE.
(L.S.)