Improvements in the Construction of Printing Machines.
Year: 1886

page_text: Date of Application, 23rd June, 1886.
Complete Left, 3rd Mar., 1887.
Complete Accepted, 5th Apr., 1887.
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Printing Machines.
Parade
HENRY PATTMAN TRUEMAN and JOHN GEORGE NEW both of 78
Birmingham in the County of Warwick, Engineers and Machinists do hereby declare
the nature of this invention to be as follows:-
The nature of our invention relates to the construction of that class of Printing
Machines known in the trade as Platen Machines, which said machines are calculated
to be worked by manual or mechanical power. Our invention consists in forming
the main casting of a central plate of suitable elevation and cross section, upon
which plate are formed extensions on either side so as to make up the width required
for the proper fixing of the component parts of the machine. There are also some
minor details connected with the position and arrangement of the gear work and
inking mechanism which are comprehended in these improvements. Our object is to
provide a simpler form of construction than hitherto employed so as to reduce first cost
and add to the light running and effectiveness of the machine. Hitherto the main
frame work of Platen Machines has either been built up with frames in pairs connected
by stretcher bars, or the frame has consisted of a single casting formed as a hollow
box. Our improved printing machine body castings differ from these in being a
single plate of which extensions are formed to carry the gear work in proper positions.
There is a main gear wheel, and pinion on fly wheel shaft fixed at the lower part of
the machine. A connecting rod from the main gear wheel proceeds to the roller
gates which are fixed on a shaft passing through extensions on the body at the upper
part of the machine. The revolution of the main gear cause these roller gates and
the rollers affixed thereto to rock backwards and forwards through any space less
than half the diameter of a circle. During this motion they alternately receive ink
from the ink plate and give it off upon the types, which said types, or forme, are by
means of a chase fixed to the main casting of the machine in the usual way. The

page_text: platen also is attached to the extensions on the body and faces the type in the aforesaid
chase. Two draw bars or side arms are affixed to the aforesaid roller gates and are
connected to a casting which carries the platen, passing over trunnions immediately
below the bottom edge of the platen. By this arrangement sheets larger than the
space between the side arms may be printed upon the machine. In some cases the body
casting has a bi-furcated foot formed at the lower part of the same, for the purpose
of providing an extended base without the necessity of adding a seperate base
connected by bolts.
13
1 11-

page_text: Improvements 11 the Construction viriting machines.
HENRY PATTMAN TRUEMAN and JOHN GEORGE NEW both of 78 Parade
Birmingham in the county of Warwick, Engineers and Machinists, 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. :-
The nature of our invention relates to the construction of that class of Printing
Machines known in the trade as Platen Machines, which said machines are calculated
to be worked by manual or mechanical power. Our invention consists in forming.
the main casting of a central plate of suitable elevation and cross section, upon
which plate are formed extensions on either side so as to make up the width required
for the proper fixing of the component parts of the machine. There are also some
minor details connected with the position and arrangement of the gear work and
inking mechanism which are comprehended in these improvements. Our object is
to provide a simpler form of construction than hitherto employed so as to reduce
first cost, and add to the light running and effectiveness of the machine. Hitherto
the main frame work of Platen Machines has either been built up with frames in
pairs connected by stretcher bars, or the frame has consisted of a single casting
formed as a hollow box. Our improved printing machine body castings differ from
these in being a single plate of which extensions are formed to carry the gear work
in proper positions. There is a main gear wheel, and pinion on fly wheel shaft fixed
at the lower part of the machine. A connecting rod from the main gear wheel proceeds
to the roller gates which are fixed on a shaft passing through extensions on the body
at the upper part of the machine. The revolution of the main gear cause these roller
gates and the rollers affixed thereto to rock backwards and forwards through any
space less than half the diameter of a circle. During this motion they alternately
receive ink from the ink-plate and give it off upon the types, which said types, or
forme are by means of a chase fixed to the main casting of the machine in the usual
way. The platen also is attached to the extensions on the body and faces the type
in the aforesaid chase. Two draw bars or side arms are affixed to the aforesaid
roller gates and are connected to a casting which carries the platen, passing over
trunnions immediately below the bottom edge of the platen. By this arrangement
sheets larger than the space between the side arms may be printed upon the
machine. In some cases the body casting has a bi-furcated foot formed at the lower
part of the same, for the purpose of providing an extended base without the necessity
of adding a separate base connected by bolts. That our invention may be fully
understood and carried into operation, we will describe the accompanying sheet of
drawings made to a scale which is shewn on the drawing, and marked with letters
of reference. Fig. 1 is a front elevation of so much of a printing machine as is
required to shew our invention. Fig. 2 is a side clevation of the same with the
gear wheels, connecting rods, roller gates, side arins, and platen shewn in their
relative positions. Fig. 3 is a front elevation of a body casting shewing the bi-
furcated foot. Fig. 4 is a side elevation of the moving parts when "off impression."
Similar letters indicate the same parts of the machine in all the drawings. In Fig. 1
A is the plate strengthened with flanges and provided with extensions or bosses B
on either side of A to make up the width required for the machine. These extensions
or bosses are also more clearly shewn in Fig. 3 and the bi-furcated foot is indicated
at C. C. In Fig. 2 D is the main gear wheel, driven by the pinion E on the fly
wheel shaft. Q. (Figs. 2 and 4) is the path of the centre of crank pin P. F. F' is

page_text: the connecting rod taking on to the crank pin P on the gear wheel D at one end,
and to a stud H on the roller gate H at the other. This connecting rod is in two
parts and is jointed at G². There is a radius rod G₁ connected to the eccentric
strap 1 on the eccentric I. which governs the position of the parts of the jointed
connected rod F. F. This radius rod G¹ works on an eccentric at I the centre of
which is at I see Fig. 4. which eccentric can be moved by the lever J. The
roller gate H swinging on a trunnion H on one side of the machine is actuated by
the connecting rod F. F' and communicates its motion to the roller gate on the
opposite side. Either the right or left hand gate inay be the driven one, or if
desired the gear work and rods may be duplicated or arranged to work on both sides
of the machine at the same time. The side arms O proceed from a stud H² on the
roller gate H to a trunnion on the jaw L marked K. This trunnion is placed below
the bottom edge of the platen N. This jaw L is hinged or pivotted at M. Fig. 2
shews the machine with its parts in position at the moment of impressing a sheet
of paper upon the forme of types H and the dotted lines shew the parts in position
for feeding a sheet of paper into the machine. The usual inking arrangements and
frisket fingers common to printing machines are provided, but they are not shewn in
the drawings. The action the machine is as follows:-The revolution of the D
gear
actuates the connecting rod F. F and the roller gates H move the rollers H3 down
the ink plate H and across the type H, the same action by means of the side arms O
at H2 and K opens the jaw L carrying the platen N. The parts are now in position
shewn by the dotted lines, and it will be seen on referring to the drawings that the
radius rod G¹ has altered the position of the parts of the jointed connecting rod F. F
so as to bring G¹ and the upper half of F. F into, or just beyond, a straight line, and
that this is effected at the same time that the crank pin P of the main gear wheel D is
passing its upper dead centre. This arrangement ensures a pause or rest to the platen,
enabling the operator to fect the sheet to be printed. Again on referring to the closed
position of the machine shewn in full lines Fig. 2. it will be seen that the radius rod Gr
forces the connecting rod F. F1 out of the straight line. This radius rod being
mounted on the eccentric I. can by means of the handle J be turned on its axis, which
will cause the connecting rod F. F to be more or less out of a straight line. This is
more clearly indicated in Fig. 4. which shews the position of the various parts when
the platen is "off impression." This arrangement provides a simple and effective
means of shortening or lengthening the connecting rod for the purpose of altering the
intensity of, or preventing an impression being made on a badly laid sheet. The radius
rod G and the jointed connecting rod F. F may be placed in any other convenient
position, the essential feature according to our invention being, that two of the
members should form a straight line or nearly so, at the moment of the platens greatest
distance from the type.
Having now particularly described and ascertained the nature of our said invention,
and in what manner the same is to be performed, we declare that what we claim is.
First. In a platen printing machine to be driven by treadle or mechanical power,
the body consisting of a plate A with extensions B, as and for the purpose described.
Second. In a platen printing machine for treadle or mechanical power. The jointed
connected rod governed by a radius rod, as and for the purpose described.
Third. In a platen printing machine for treadle or mechanical power, the radius rod
in combination with an eccentric, as and for the purpose described.
יד
2
CMI 1007
HENRY PATTMAN TRUEMAN.
JOHN GEORGE NEW.