Year: 1889

page_text: A communication to me from abroad by GUSTAV HEINSIUS, of Dresden, in the Empire
of Germany, Merchant.
L, EDMUND EDWARDS, of the firm of Edwards and Co., Patent Agents and
Engineers, of 35, Southampton Buildings, Chancery Lane, in the County of Middlesex,
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 and accompanying drawings (that is to say):
:-
This invention relates to new and useful improvements in lithographic pressos and
it has for its object to obtain not only a self acting pressure, in printing, but also to
provide a self acting inking mechanism.
1
The accompanying drawings are in illustration of the invention and the manner in
which the same is to be performed.
"
Figure 1 is a side olevation of a lithographic press embodying the improvements of
the invention, the slide or table in this figure being fully drawn out to the left.
Figure 2 is a plan of figure 1.
Figure 3 is a side elevation of the press, with the slide or table in its midway
position and the inking-roller with its supporting frame elevated.
Figure 4 is a front view of the press, corresponding to Figure 3.
The automatic pressure is worked by an elastic roller i of india rubber, turning
in bearings in the stationary frame, and the inking roller S of india rabber
is provided in a rocking frame U, R.
The two lateral standards A of the main frame are connected by cross bars B and
firinly united by screw bolts so as to form a strong frame supporting the working
mechanism. Within the slots of the side frames A, a slide or table. D.is arranged
to travel to and fro in the direction of the length of the frame.
To the lower side of the said slide D, two toothed racks E are secured, gearing with
the toothed wheels G, which are mounted upon a common shaft to which motion is

page_text: imparted in both directions by the winch handle H. By means of the said handle
and shaft the slide or table D which carries the lithographic printing stone F, is
worked in either direction.
To the lower surface of the slide D, a long flat bar K is pivotted as shewn at I;
and to the said bar K a round cross bar I is secured, which, at the front of the
press, bears against the stops or pins M, while, at the rear of the press, the said
cross bar bears against the stops or pins N on the cross bar B.
By means of the said stops M and N the travel of the slide D is limited in either
direction.
The crossbar L is guided by and slides upon the two guide bars O made integral
with the crossbar B.
At the front the said guide bars O are slightly lowered or bent down, towards the
stops M; at O' they have an upward crank or curve, and at 02 they are lowered
again towards the back horizontal part, where the stops N are provided.
On the lower side of the flat bar K, near the cross bar L, a stud B projects down-
wards, which when the slide D moves inwards, bears against a stud projecting
from the crossbar R' of a lever frame R, Figure 2; the said lever frame R, is
thereby carried a short distance to the rear and, working against the elbow lever U,
lifts the same and the inking roller S which is carried by the said lever U, as
shown in figure 3. When the stud P then sli:les upward with the crossbar I on
the inclined surface O¹, it comes off the stud Q and the slide moves freely on.
The two corresponding levers R, connected by the crossbar R' are arranged at
the sides of the frame A; the stud Q projects from about the middle of the
crossbar R. Both levers R are pivotted to the lower end of an elbow lever U,
the fulcrum of which at V is arranged in brackets m carried by the main frame A. The
levers R are adjustable with reference to the levers U, by means of slots and screw
bolts. A spring W and guide W' provided for each of the levers R tend to hold the
said levers down. Each of the levers R is provided with a fork X engaging with one
of the studs a b c projecting from a plate T secured to either side of the slido D, the
said studs a b c serve to lift the fork, as will bo further described.
To each of the levers R a heel or stud Y is formed or secured, projecting inwards
and sliding in guide grooves Z in the standards A, to steady the movements of
the levers and to stop the same in certain positions.
The working of this improved lithographic press is as follows:-On turning the
bandle H in the direction of the arrow, Figure 1, the slide D moves inwards, the
studs c which had been inside the fork X, and also the studs b, slide out of their
respective forks, while the studs a engage with and carry the upper prong of the
fork X, Figure 1, so as to lift the said fork from its position of rost and make the
heel Y enter into the curve of the groove Z.
At the same time the stud P bears against the stud Q of the crossbar R³ and pushes
the lever frame R R a short distance back; and the heel Y slides up to the end
of the groove Z. In the meantime the crossbar L has run up the inclined
surface O' of the guides O, whereby the stud P comes off the stud the slide D
Doves on, and the heel Y through the pressure upon the lever R by the spring W
comes down into the recess of the groove Z Figure 3, whereby the levers are
stopped and held in their position as shown in figure 3.
The slide D has reached the end of its course when the crossbar L bears against
the stops N.
On turning the handle H in the opposite direction the stud bon plate T will,
near the end of the slide-race, engage with the lower prong of the fork X
Figure 4, so as to lift the said fork and with it the heel Y until the latter
enters into the curve of the groove Z, when the stud e will bear against the lower
prong of the said fork X and carry the same further on.
The lever frame R R is thereby again forced towards the front part of the
press and the inking roller S. d is lowered down with the elbow lever U; and the
hool Y finally, enters into its original position of rest within the groove Z.
The inking of the stone F, on the surface of which the characters, or designs, to be'

page_text: printed are prepared is effected in the following manner. The ink is applied to the
stone by the india rubber inking roller S, to which ink is supplied by the feed roller d.
The roller S, while inking, keeps the position shown in Figure 1, to which position
the lever frame U had been brought down, as before described, by the return motion
of the slide D. On causing the slide D to travel again below the said inking roller,
the flat bar K is lifted by hand sufficiently to make the stud P pass freely over the
stud Q. Accordingly, the lever frames R R₁ U will remain in their lowered position
as shown in Figure 1, and the inking roller S will bear upon the surface of the stone
as the latter travels below the said roller.
The slide D may be made to travel backward and forward below the roller S until
the stone has been sufficiently inked.
The pressure roller i of india rubber is arranged to turn in fixed bearings on the
brackets m; this roller does not touch the stone as it travels to and fro; while, for
printing, a couch of cardboard is laid upon the paper, sufficient in height to make
the roller i give a suitable pressure, as the stone passes below.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a lithographic press an automatic mechanism for applying the inking roller,
the said mechanism consisting of a lever frame with forks X and heels Y working
in curved grooves Z, in combination with a bar K pivotted to the slide D, the said
bar K having a stud P which works against a stud Q of the lever frame R R¹ so as to
push the same back and lift the inking roller S, as the slide moves on, substantially as
and for the purpose set forth.
2. In a lithographic press of the kind described and claimed in claim 1, the com-
bination with the slide D, of a plate T having projecting studs or pins a, b, c, which
during the travelling motion of the slide D, engage with the prongs of the fork X of
the lever-frame R R so as to lift and guide the said frame and to lower the inking
roller S, substantially as and for the purpose set forth.
Dated this 14th day of March 1889.
EDWARDS & Co.,
35, Southampton Buildings, London,
Agents for tho Applicant.