Improvements in Lithographic or Zincographic Cylinder Printing Machines.
Year: 1887

page_text: Date of Application, 8th Jan., 1887.
Specification Accepted, 8th Mar., 1887.
Improvements in Lithographic or Zincographic Cylinder
Printing Machines.
I, AUGUSTE PARRIZY, of No. 6 rue Taylor, Paris, in the Republic of France,
Engineer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement:-
My invention for improvements in lithographic or zincographic cylinder printing
machines has for object the construction of an improved machine in which litho-
graphic impressions can be produced of any desired size on paper unwound from
a continuous sheet wound upon a roller and cut after impression and in which the
register "of the two sides of the sheet shall correspond in the two directions,
horizontal and vertical. The impressions may be printed in one or in several colours
and the paper may be printed upon one side only or upon both sides.
In the accompanying sheet of drawings
Fig. 1 is an elevation of a cylinder printing machine constructed according to this
invention.
Fig. 2 shows the machine for cutting the continuous sheet of paper into sheets of
the proper size after it leaves the printing machine; and
Figs. 3 & 4 are respectively longitudinal and transverse sections of a printing
cylinder constructed according to this invention.
The main frame of the machine comprises the parallel similar standards A which
are conveniently stayed and support the inechanism. The sheet of paper to be printed
upon is in the form of a continuous sheet wound upon a roller to form the bobbin B.
The roller B over which the continuous sheet passes before it reaches the printing
and impression cylinders D, E is placed sufficiently above them to increase the
resistance to unrolling.
The printing cylinders D D¹ are placed vertically under the impression cylinders E E'
and are supported in bearings adjustable in a horizontal plane on the levers a a' by
means of the screws r, v, r², . Each lever a is pivotted at one end to the standard A
and its other end is connected by the link c-whose length can be varied by means of

page_text: C
the right and left hand screw nuts to regulate the pressure and the position of the
printing cylinder-to the end of a lever weighted at its other end. This latter end
can be raised or lowered by means of the hand lever e whose army is connected by a
link to the crank arm which is secured to the cam d acting on the weighted end of
the lever b. The levers band the parts operating them may be replaced by
springs N acting on the ends of the links c c. The standards A. are recessed at 00¹
as shown so that the printing cylinders D D¹ can readily be removed, they being
perfectly open in front. The ink for inking the printing cylinders is supplied from
the ink pots mm to the rollers P, thence to the large roller H on which the ink is
spread by the rollers i,j, i,j, and transmitted by the distributing rollers k, k, k¹, k¹,
to the printing cylinders DD¹. The rollers o, p, q, o', p', ', serve to damp and also
to clean the surface of the printing cylinders DD after they have effected the
impressions.
The impression cylinders EE are mounted in bearings capable of sliding in
grooves XX in the standards A and are geared to the printing cylinders so as to
have the same circumferential speed. The grooves XX are terminated by caps ZZ
pivotted to the standards A at Y Y and forming nuts for the screws K which secure
the bearings firmly in position. When required to raise the impression cylinders E E',
the screws K. Kare loosened and the cylinders raised by means of straps encircling
the shafts of the cylinder and connected by chains with the levers u, ul. Endless
sheets FF run over pulleys a, al and round the lower parts of the impression
cymers EE which drive them at their own speed. The tension of the said sheets
is regulated by means of screws acting on the bearings of the rollers
endless sheets serve to equalise the pressure of the cylinders EE¹ upon the
cylinders D D¹.
c. These
When the printing machine is in operation, the continuous sheet of paper from the
bobbin B unwinds in the direction indicated by the arrows and passes over the roller B
which slightly increases the resistance of the paper to unwinding and then passes
downwards and between the endless sheet F and the printing cylinder D where it is
printed on the underside and then rises in the direction of the arrows with its printed
side outside and passes close to the gas flame G and over the rollers yy which serve
to guide the sheet and partially dry the freshly made impression. The sheet then
passes downwards and between the endless sheet F and the printing cylinder D¹
where its other side is printed on and finally passes upwards close to the gas flame G¹,
which dries the freshly made impression, and over the rollers t to the cutting
machine which is of any ordinary construction except that it is arranged to be
driven from the printing machine in such manner that the drum carrying the cutter
makes one revolution for every revolution of the type cylinders.
The sheet F in addition to equalising the pressure of the cylinder E¹ upon the
cylinder D also drys and blots the first made impression. The said sheet F in passing
the gas flame G¹ is heated and dried and in its turn heats and dries the first made
impression. The rollers y y¹tt are arranged and constructed so that they can be
heated interiorly by a hot fluid.
Each printing cylinder D D' comprises the central cylinder or base J carried by the
shaft 1 and on which is mounted a cover R made in one or two pieces and of a
diameter corresponding to the desired size of the printed sheet. The cover R is itself
covered by the zine sheet L having the required impression on it and secured in place
by means of a longitudinal groove in the cover R, one edge being forced down into
the groove and the other edge being screwed over it. The size of the printed sheet
being determined by one revolution of the cylinders DD, these cylinders must
correspond exactly with the size chosen and must vary with it. The diameter of the
impression cylinders EE' may be made equal to that of the printing cylinders or may
be different therefrom but the tangent point of the pitch circles of the gearing which
drives these cylinders ought to be in the prolongation of the line of contact of these
cylinders. The gearing must thus be changed with the printing cylinders or with the
covers R.
When required to print in several colours, the diameter of the impression cylinders E E'

page_text: is increased and the printing cylinders are arranged around the lower part of the
impression cylinders and are forced against the impression cylinders by springs acting
upon their bearings which slide in grooves similar to the grooves X X'; the said type
cylinders having a diameter corresponding to the size of the printed sheet. Each
type cylinder is inked independently by its own colour.
If desired to print on one side of the paper only, one side only of the machine is
used-viz. the side containing the cylinders DE and the cutting machine C is
arranged on the opposite side of the machine, the sheet passing over the rollers y y¹
to it.
It will readily be seen that the above described arrangement of the printing and
impression cylinders permits (1) of the use of printing cylinders of different sizes
upon the same machine so that the size of the printed sheet can be varied, (2) of the
ready removal and insertion of the printing cylinders to facilitate the fixing of
the forms (3) of ready inspection of the printing and impression cylinders and
(4) of the regulation of the pressure between the printing and impression cylinders.
The course of the continuous sheet M also is such that the printed side of the paper
does not come in contact with anything liable to injure it until it is dried.
The register can be adjusted for the vertical lines by means of the screws and
for the horizontal lines by means of the rollers-y y' which can be raised and lowered
by the gearing shown.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is :-
In cylinder printing machines which print in any desired size on a continuous
sheet of paper cut into sheets after receiving the impression, the construction and
arrangement of the printing cylinders D surrounded by the variable sized covers R
whose peripheries are entirely covered by the zinc sheets L having a development
equal to the size of sheet into which the paper is to be cut and engraved with the
required design, the said cylinders having their shafts supported in bearings sliding
in slots in the standards and being forced by springs against the impression cylinder E
and each said printing cylinder being separately supplied with ink of the desired
colour substantially as described.
WHEATLEY & MACKENZIE,
156, Strand, London, W.C.,
Agents for the Applicant.