Improvements in or relating to Printing Machines for Printing in Two or More Colours at One Impression or Operation.
Year: 1891

page_text: Date of Application, 21st Mar., 1891
Complete Specification Left, 14th Dec., 1891-Accepted, 16th Jan., 1892
PROVISIONAL SPECIFICATION.
Improvements in or relating to Printing Machines for Printing in
Two or More Colours at One Impression or Operation.
I THOMAS JOHNSON of Nantwich in the County of Chester Printer and
Stationer do hereby declare the nature of this invention to be as follows:-
The object of this invention is to provide for the printing on an ordinary cylinder
printing machine of a number of colors from the same forme at one impression with
as little alteration of the existing parts of the machine as possible.
It consists essentially in the addition to the present ink distributing rollers of one
two or more sectional rollers or rollers composed of adjustable bobbins provided with
a reciprocating motion to distribute the ink and mounted on top of two ordinary
composition rollers which run in contact with the ink slab.
In carrying out the invention I construct the type carriage ink slab and inking
rollers in the usual way and I apply to the machine a divided ink trough of any
well known construction whereby any required number of inks of different colors
may be applied to the ink slab.
I remove the ordinary vibrating or reciprocating distributing rollers which are
placed at an inclination across the machine to come in contact with the ink slab
and instead thereof I place two rollers without any longitudinal movement
preferably square with the longitudinal axis of the machine. Above these rollers
and in rolling contact with them I mount one or two rollers consisting of a number
of narrow pieces or bobbins each of which must be narrower than the corre
sponding stripe of color required. Above the sectional roller may if desired be
placed another roller of composition.
To the sectional roller I give a longitudinal reciprocating movement by means of
a fixed cam or cam groove on the reciprocating carriage in which a bowl or runner
on a lever at the end of the roller works. The length of travel of the roller may
be regulated and adjusted by altering the length or fulcrum of the lever.
The ink will be applied to the slab in a narrow stream and will be picked up by
the composition rollers in contact with it. The ink will thus be supplied in stripes
much narrower than the type to be inked therewith. The adjustable pieces of the
sectional rolls are also narrower than the type but the difference between the width
of stripe required and the width of the adjustable bobbins or pieces is equivalent to
the distance which the roller reciprocates. By this means I get a perfect distribution
of the ink in stripes upon the slab of any required width without one running
into the other which is taken up in the usual way by the ordinary inking rollers
and transferred to the type and by this arrangement I am able on an ordinary
machine with but slight alteration to print any required number of colors at the
same time.
Dated this 20th day of March 1901
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.

page_text: .
COMPLETE SPECIFICATION.
Improvements in or relating to Printing Machines for Printing in
Two or More Colours at One Impression or Operation.
I, THOMAS JOHNSON, of Nantwich, in the County of Chester, Printer and
Stationer, do hereby declare the nature of this invention und in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement:―
The object of this invention is to provide for the printing on an ordinary cylinder
printing machine of a number of colours from the same forme at one impression
with as little alteration of the existing parts of the machine as possible.
It consists essentially in the addition to the present ink distributing rollers of a
sectional roller composed of a number of sectional bobbins-each narrower than
the line of type to be inked-having a reciprocating movement to distribute the ink
and mounted on top of two ordinary composition distributing rollers which run in
contact with the ink slab.
It will be fully described with reference to the accompanying drawings.
Fig. 1. side elevation of part of frame of printing machine with my invention
applied thereto.
Fig. 2. longitudinal sectional elevation of same.
Fig. 3. end elevation.
The type carriage A, ink slab B, and type inking rollers C, are all constructed
in the usual way, and I also apply to the machine in place of the ordinary knife of
the ink duct, a number of divided ink troughs of any convenient construction,
whereby any required number of inks of different colours may be applied to the
surface of the ink slad B by the vibrator.
I dispense with, or remove from the machine, the ordinary vibrating or recipro-
cating ink distributing rollers, such as are commonly used with printing machines,
and which are placed at an inclination across the machine to travel longitudinally
across the ink slab when they come in contact with it.
Instead of these ordinary distributing rollers, I employ two distributing
rollers D, D', which have no longitudinal movement across the ink slab B, and are
placed preferably square with the longitudinal axis of the machine. And in con-
junction with the rollers D, D' above them, and in rolling contact with them, I
mount a roller E consisting of or composed of a number of narrow sectional rolls or
discs e, one for each stripe of colour required, and each narrower than the stripe of
colour to which it corresponds. Above the sectional roller E, I prefer to place
another roller F.
To the sectional roller E while rotating, I give a continual longitudinal recipro-
cating movement by an eccentric G, or by a crank or other convenient mechanism.
As the ink slab B moves to and fro, the rollers D, D' are rotated by it, and also
the sectional roller E, which is in rolling contact with the two former, the roller F
being in the same way rotated by its contact with the sectional roller E. Spur
wheels on the ends of the shafts of the rollers D D', gear with a carrier wheel don
a stud d. Attached to and rotating with the spur wheel d is a bevel wheel g which
gears with and drives the wheel g' connected to the eccentric G. The eccentric G
is connected to the sectional roller E, by a fork H through a jointed connecting
rod h and the fork H is provided with guiding tongue h¹ which slides to and fro in
a hole in the frame I.
The distributing rollers D D₁ are made of composition in the usual way, the
discs e of the sectional roller E are metal, and the top roller F is composition.
The ink is divided on the duct cylinder by a number of adjustable dividers
which are made different widths to suit the lines of type to be worked, the ink is
supplied to the ink slab B from the duct cylinder by the ordinary vibrating
composition roller L.

page_text: The dividers J which constitute the ink supply or trough as shown in Fig. 2
are constructed to fit close round the duct roller K and provided with a sliding
bottom k between the sides j. The sliding bottom k is drawn to and from the
roller K, and the distance between them regulated and adjusted by the screw j¹.
These are in place of the ordinary knife adjuster which is entirely dispensed with.
The ink is supplied to the slab B by the vibrator L in narrow streams from the
several divisions of the ink duct, each stream being narrower than the width of
type to be inked by it, and the distributing rollers D D'- as the slab B comes in
contact with them and rotates them, pick up the ink which has been deposited on
the slab, the ink being thus carried in stripes of different colours round the
rollers D D and at the same time distributed in stripes throughout the length of
the slab B. The adjustable removable discs e which are of variable widths, are set
in position on the roller E to correspond with the line of type each being narrower
than the line of type to be inked, the difference between the width of stripe required
and the width of the adjustable discs e is equivalent to the distance which the roller
reciprocates. By this means I get a perfect distribution of the ink in stripes upon.
the slab, of any required width, without one running into the other.
Thus if the ink issues from the ink duct in a stream of one inch wide, and the
roller E moves to and fro longitudinally through a distance of one inch, the ink
when taken up by the rollers D, D', is distributed upon their surfaces in stripes two
inches wide, and by the rollers D, D', the ink is then distributed or laid upon the
slab B in parallel stripes of the same width. And the ink when thus distributed in
stripes upon the ink slab B is taken up in the usual way by the ordinary type
inking rollers C, and transferred to the type, and by this arrangement I am able on
an ordinary machine with but slight alteration, to print any required number of
colours at the same time.
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 :-
.
In a printing machine, the combination of the sectional roller E with the dis-
tributing rollers D, D¹, arranged to operate with the travelling ink slab B to
distribute the ink in stripes after it is delivered to the ink slab for the purpose of
printing two or more colours at one operation, substantially as described.
Dated this 1941 1. Desember 1901.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.