Year: 1897

page_text: Date of Application, 1st Sept., 1897-Accepted, 29th Jan., 1898
Figure 5 is a view of the lever-handle and the connections to the belt-fork.
Figure 6 is a view of one of the adjustable plates for raising and lowering the
printing rollers.
Figure 7 is a broken view of one of the printing rollers, and the runner and
pinion.
Figure 8 is a broken view of the rack.
A is the feeding board which consists of a flat piece of wood plated with brass
at either end, with a central slot A also plated with brass, this board is hollowed
out between the central slot and the sides as shewn in the drawing, thus allowing
the operator standing in front to see the work on the stone and also allowing free
access to the damping rollers H, situated immediately behind the board; the lower
edge of the board is bevelled off as shewn at A3, this allows for the introduction
of a thick tympan B₁ upon the printing cylinder B, to suit any class of work, and
enables the operator to print cards without rubbing and envelopes without mark-
ing. The cylinder B revolves in journals and presses on the paper to be printed,
when placed on the stone, as it is propelled forward. Where the lower edge of
[Price 8d1

page_text: the board is not bevelled off a thick tympan cannot be used and in printing
envelopes they are liable to get marked by the unyielding pressure of the
cylinder B. A¹ is a metal feeding lay preferably made of brass, secured in the
central slot by a thumb-screw and adjustable to the desired position required by
the size of the paper used: A is a metal screw pointed at
and provided with a thumb-screw at the other end for adjusting the
same, which is fixed to the feeding board and acts as a guide for placing the
paper on the feeding board according to the size of the sheets used.
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one end
In machines of this description, as heretofore constructed a bearing roller is
employed in front of the machine, revolving in journals at either side, which
receives the end of the stone carriage as it travels forward and prevents the same
from tipping up by the pressure of the printing cylinder B. In lieu of this
roller, which we dispense with, we employ one. or more small rollers and fixed
bearers D and D₁, secured to the side frames by any suitable means, which
receive the stone carriage.
Suspended in the bearings on the side frames, which in the machines as hitherto
constructed, are used for the bearing roller above mentioned, is a metal shield C,
to which is rivetted a metal bar the ends of which rest in the said bearings (or
the same may be formed of one sheet of metal). This shield is for the purpose of
keeping the work clean as it comes from the machine.
E is the lever-handle connected to the fork-rod for throwing the machine in
and out of gear and so fixed that it can be manipulated by the operator at the
front of the machine.
1..
F is a foot-brake also in front of the machine and under the immediate control
of the operator. G is the inking slab, G¹ the distributing rollers and G2 the
printing rollers; N is the stone-carriage; H indicates the damping rollers, there
being two on the same level as the printing rollers and an extra one resting upon
the two lower ones, supported by small brackets H¹; this extra roller obviates the
necessity of damping so frequently as when only two are employed. K and K¹
are the adjustable plates secured to the sides of the stone-carriage; the litho-
graphic stone being fixed in the carriage between these plates, as the carriage
travels forward and backwards, the runners M on the ends of the rollers ride over
these plates, thus lifting the rollers free from the edge of the stone and allowing the
same to smoothly glide on to the top of the stone, minimizing the friction and
facilitating the machine being run at a greater speed with less wear and tear to
the work on the stone.
The runners M are fitted on to the ends of the rollers with a stud and parallel
slot, (as shewn in Figure 7 which represents one of the printing rollers), and can
be immediately removed when necessary for renewal or repairs.
Figure 8 shows a rack which is secured on one side of the stone-carriage
between the printing rollers and inking rollers preferably made of cast brass, the
casting extending at each end beyond the teeth as shewn; O is a pinion pre-
ferably of cast iron, one of which is fixed on one end of the spindle of each
printing roller; these pinions engage with the rack, but at each succeeding stroke of
the machine, the pinions are released at each end of the rack, thus ensuring that
the rollers shall not impinge with the lithographic stone at the same spot on the
surface of the roller.
The object of the pinions is to ensure the printing rollers revolving and to pre-
vent their possibly sliding, which they occasionally do in the machines as heretofore
constructed, thereby causing the work to wear out and fine lines to disappear. As
the rack wears out it can easily be removed and replaced by a new one.
At the back of the machine are the rollers G¹, termed distributing rollers,
which distribute the ink on the inking slab; and at the front of the machine are
the rollers G², termed printing rollers, which pick up the ink from the inking
slab and transfer it on to the stone; the printing cylinder B with its tympan Bi
presses the paper to be printed on to the stone and the transfer from the stone to
the paper is thus effected.

page_text: Our improvements consist, firstly, in the feeding board A which differs from the
present feeding board in so far that it is hollowed out at the top instead of being
straight and thus obscuring the work from the view of the operator, also that it
is further bevelled on the lower edge to allow of a thick tympan being used.
Secondly, that we employ a shield C in the front of the machine. Thirdly, that
the adjustable plates K and K¹ lift the rollers free from the edge of the stone,
which not only saves the wear of the roller skins by preventing the rollers from
striking the edge of the stone, but also prevents the edge of the stone getting
inked and minimizes the friction in working the machine, and accelerates the
working speed. Fourthly, the brake F and lever E being fitted to the front of the
machine are controlled by the one operator standing at the front. Fifthly, the
pinions on the spindles of the printing rollers, engaging with the rack on to
the stone carriage, ensure the printing rollers revolving, thus preventing any
possibility of their sliding and wearing the work out.
The combination of these improvements dispenses with an assistant, now
absolutely necessary for the efficient working of machines of the same class as
heretofore constructed, and allows the machines to be worked by the one operator
standing in front; the whole being under complete control.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
1. In a lithographic machine, the feeding board A constructed in the form
shewn and arranged as described and illustrated by the drawings, for the purpose
set forth.
2. In a lithographic machine, the metal shield. C as described and illustrated
by the drawings, for the purpose set forth.
3. In a lithographic machine, the adjustable plates K and K' as described and
illustrated by the drawings, for the purpose set forth.
4. In a lithographic machine, the foot-brake F and the lever E fitted to the
front of the machine as described and illustrated by the drawings, for the purpose
set forth.
5. In a lithographic machine, the rollers or bearers D and D' as described
and illustrated by the drawings, for the purpose set forth.
6. In a lithographic machine, a rack, such as in Figure 8, the casting extending
at each end beyond the teeth, in combination with a pinion O secured to one end
of the printing rollers, as described and illustrated by the drawings, for the
purpose set forth.
7. The improved lithographic machine constructed substantially as described
with reference to the accompanying drawing and operating as and for the purposes
above specified.
Dated the 1st day of Sentember 1897
D. YOUNG & Co.,
11 and 12, Southampton Buildings, London, W.C.,
Agents for the Applicants.