TYPOGRAPHIC AND LITHOGRAPHIC PRINTING MACHINES
Year: 1878

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IMPROVEMENTS IN
LETTERS PATENT to Alexander Melville Clark, of Chancery Lane, in the
County of Middlesex, Patent Agent, for the Invention of
TYPOGRAPHIC AND LITHOGRAPHIC PRINTING MACHINES."
from abroad by Auguste Hippolyte Marinoni, of Paris, France.
A communication
Sealed the 28th December 1878, and dated the 25th July 1878.
PROVISIONAL SPECIFICATION left by the said Alexander Melville Clark
at the Office of the Commissioners of Patents on the 25th July 1878.
ALEXANDER MELVILLE CLARK, of Chancery Lane, in the County of Middlesex,
Patent Agent. "IMPROVEMENTS IN TYPOGRAPHIC AND LITHOGRAPHIC PRINTING
MACHINES." [A communication from abroad by Auguste Hippolyte Marinoni, of
Paris, France.]
This Invention relates to an improvement in the inking apparatus of typographic
and lithographic printing machines, and consists in the employment in addition to
the ordinary inking rollers of "riders" mounted upon and receiving rotary motion
from said rollers, as well as a positive endway motion imparted by the mechanism
herein-after described.
Many attempts have been made to produce this endwise movement, which is
indispensable to obtain a perfect distribution of the ink, but none have given
practical results, and the endless screws and other gearing employed have been
abandoned, as in such cases it was generally necessary that the slab or table should
be brought to a certain position to put the riders in place.
The present improvement consists in imparting a positive endwise movement to
the riders by a lever arrangement provided with forks in which the rider journals
are received. This lever may be arranged either in the manner shown in the
accompanying Drawing or otherwise, according to the kind of machine, the great
advantage consisting in the facility with which the riders may be removed from or
replaced in the fork whatever may be the position of the slab.

page_text: The Drawing shows the improvement applied to a Marinoni typographic machine
printing on one side only, but it will be understood that the improvement may be
applied to any other typographic machine printing either on one or both sides, as
also to lithographic machines.
Figure 1 shows a face view of the arrangement of the riders and the forked lever
for operating them, and Figure 2 an end view of same.
a, riders; b, vertical arm of lever having forks at the upper end in which the
journals of the riders are received; c, horizontal arm of lever b, furnished with a
friction roller e running between the inclined guides d; f, wheels of carriage;
g, pivot of lever b. The wheels fare caused to run to and fro by a crank and
connecting rod.
The inclined guide d is attached to the frame in which the wheels are mounted,
and partake in its to-and-fro movement; and the said guide d by its inclined
position causes the arm c engaged therein to work up and down and so oscillate
lever b on its pivot g, and the riders a whose journals are grooved or have
shoulders engaging with the forks of the lever b thus receive a positive endway
movement.
As will be seen from the Drawing a similar oscillating lever is placed at each side
of the machine in order that all the riders may be operated by the same lever
arrangement, or only one set, the other set being worked by the opposite lever. By
this arrangement the distribution of the ink and the inking of the form or stone is
much improved.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Alexander Melville Clark in the Great Seal Patent Office on the
23rd January 1879.
ALEXANDER MELVILLE CLARK, of Chancery Lane, in the County of Middlesex,
Patent Agent. "IMPROVEMENTS IN TYPOGRAPHIC AND LITHOGRAPHIC PRINTING
MACHINES." A communication from abroad by Auguste Hippolyte Marinoni, of
Paris, France..
The inking of the forms and stones in typographic and lithographic printing
machines is ordinarily effected by rollers mounted in racks upon the machine
framing which roll alternately upon the inking table to take up the ink and upon
the form or stone to transfer the ink thereto. With this arrangement it is extremely
difficult to obtain a uniform distribution of the ink and a perfect inking even
by using a large number of rollers, which have the disadvantage of necessitating a
longer traverse of the carriage and consequently diminish the production of the
machine.
The ink remains on the inking rollers just as it was taken up from the table until
it is transferred to the form or stone, and when, as always happens, the same portion
of the roller which inked a part of the form or stone at its first revolution is required
to ink another part of the form or stone at its second revolution, it necessarily follows
that at this second inking the form or stone is inked much more lightly than at the
first. This irregular inking is especially apparent in printing illustrations, borders,
and vignettes. It has been sought to remedy this defect, but with very imperfect
results, by using a large number of inking rollers, or as hitherto practised by the
use of "rider" rollers receiving a movement of rotation only by contact with the
inking rollers.
In order to obtain a perfect distribution of the ink it is however necessary that
these riders should have an endway motion, and many attempts have been made to
effect this object, but none have given practical results, and the endless screws and
other gearing employed have been abandoned, as in such cases it was generally
necessary that the inking slab or table should be brought to a certain position to
admit of putting the riders in place.
The present improvement consists in imparting a positive endwise movement to
the riders by an arrangement of lever provided with forks in which the rider journals
are received. This lever may be arranged either in the manner shown in the
accompanying Drawing or otherwise, according to the kind of machine. The great
advantages of this Invention are the regularity of motion obtained and the facility
with which the riders may be removed from or replaced in the forks whatever may
be the position of the inking table.
In order that the Invention may be more readily understood I will proceed to
describe it in detail with reference to the accompanying Drawing, which shows the
improvement applied to a Marinoni typographic machine printing on one side only,
but it will be understood that the improvement may be applied to any other typo-
graphic machine, perfecting or otherwise, as also to lithographic machines.
Figure 1 is a cross section of the machine framing showing a longitudinal view of
the riders and the fork levers for operating them, and Figure 2 is an elevation
showing an end view of said rollers.
The same letters of reference indicate the same parts in both Figures.
a are the riders, b is the vertical arm of a crank lever pivoted at g to the machine
framing; it is furnished with forks, at the upper end of which the journals of the
riders a are received. c is the horizontal arm of the same lever, furnished at its
extremity with a friction roller e, received between inclined guides d; f, wheels of
carriage traversed to and fro by a crank and connecting rod.
The inclined guides d are attached to the carriage frame and partake in its to-and-
fro movement, and the said guides d by their inclined position cause the arm c

page_text: engaged therein to work up and down and so oscillate the lever arm b, whereby the
riders a, whose journals are grooved or have shoulders in order to engage with the
forks of the lever arm b; thus receive a positive endway movement.
As will be seen in the Drawing there are two of these oscillating levers, one at
each side of the machine, in order to enable either all the riders to be operated by
the same lever arrangement, or certain only of them by the one and the remainder
by. the opposite lever.
-
This arrangement has also the advantage of producing: alternate or cross move-
ments which still further greatly improves the distribution of the ink and the inking
of the form or stone.
1!
.., Having described, the nature of the said Invention, and the manner of performing
the same, I declare that what I claim as the Invention to be protected by the
herein-before in part recited Letters Patent is, the employment in typographic and
lithographic printing machines, having riders mounted upon the inking rollers of one or
two oscillating levers, operated by the carriage and provided with forks engaging with
the rider journals, substantially as shown and described, for imparting to the riders
a positive endway motion in addition to their ordinary rotary motion as specified.
In witness whereof, I, the said Alexander Melville Clark, have hereunto set my
hand and seal, this Twenty-third day of January, in the year of our Lord
One thousand eight hundred and seventy-nine.