Improvements in Double Inking Platen Printing Presses.
Year: 1893

page_text: Date of Application, 20th Dec., 1893
•
Complete Specification Left, 20th Sept., 1894-Accepted, 10th Nov., 1894
PROVISIONAL SPECIFICATION.
Improvements in Double Inking Platen Printing Presses.
I, JOHANN MARTIN HEPPLER of Leer in East Friesland in the Empire of
Germany Lithographer do hereby declare the nature of this invention to be as
follows:-
This invention relates to a printing press in which a sheet may be printed from
two forms with different coloured inks if desired, the paper being in the form of
separate sheets or of a continuous roll. The said press may be modified or duplicated
also to so print both sides of the said sheet.
The bed plate on which the two forms are fixed is movable back and forth in
the plane of its surface upon supporting rollers by means of a lever connected.
thereto by a rod and moved by an excentric, this gear being preferably arranged
in duplicate one at each side. Two sets of inking rollers are arranged one for
each form and these are preferably the same as in ordinary cylinder presses,
comprising an ink feed roller revolved intermittently by ratchet and pawl gear and
taking direct from the ink trough, a carrying roller held in rocking arms to
alternately touch the feed roller and the distributing roller the latter being
movable endwise to equalize and spread the ink on a further roller which again
transfers same to two rollers from which the type is inked.
The platen is moved to and from the form by bars operated by cams, and may
either be fixed rigidly to the bars to move always perpendicularly to the form or
may be hinged to move angularly onto the form. The platen presses the paper
alternately on the one or other form according to the position occupied at the time
by the bed plate at the one or other end of its stroke. Where the paper is supplied
from a roll it is led between two rollers thence over a tension roller, over a roller
at the edge of the platen, across the latter, over a roller at other end of the platen,
over an adjustable distance roll whose purpose, is to adjust the length of the way
which the paper must pass over before reaching the shears, between two other feed
rollers and lastly to the shears which sever it into sheets. The two pairs of feed
rollers are connected by chain gear to move equally and one pair is driven by
ratchet and pawl gear from a rack and pinion gear operated by a cam on the
main shaft so as to shift the paper after each two printings or as otherwise
arranged.
The shears may be operated by gear from an inclined plane on the back of the
bed plate on which the forms are fixed, and returned by a counterweight.
In duplicating the machine two such movable bed plates are arranged, and
preferably suspended by chains one from the other, these chains passing over a
beam with chain wheels in the upper part of the machine. The mechanism moving
one plate thus operates also the other. The same camshaft may operate the two
platens, the four inking devices and the paper feeds, the latter being arranged so
that the face printed by the two forms on the one plate is towards the platen on the
other plate.
Dated this 20th day of December 1893
R. HADDAN,
Agent to Applicant.

page_text: CUBTIELE
DIECIERATIVA.
Improvements in Double Inking Platen Printing Presses.
1 JOHANN MARtin Heppler of Leer, in East Friesland, in the Empire of
Germany, Lithographer, 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 :-
This invention relates to a printing press in which a sheet may be printed from
two forms with different coloured inks if desired, the paper being in the shape of
separate sheets or of a continuous roll. The said press may be modified or
duplicated also to so print both sides of the said sheet.
The bed plate on which the two forms are fixed is movable back and forth in
the plane of its surface upon supporting rollers by means of a lever connected
thereto by a rod and moved by an eccentric, this gear being preferably arranged
in duplicate, one set at each side. Two sets of inking rollers are arranged, one for
each form and these are preferably the same as in ordinary cylinder presses,
comprising an ink feed roller revolved intermittently by ratchet and pawl gear and
taking direct from the ink trough, a carrying roller held in rocking arms to
alternately touch the feed roller and the distributing roller the latter being
movable endwise to equalize and spread the ink on a further roller which again
transfers same to two rollers from which the type is inked.
The platen is moved to and from the form by bars operated by cams and may
either be fixed rigidly to the bars to move always perpendicularly to the form or
may be hinged to move angularly onto the form. The platen presses the paper
alternately on the one or other form according to the position occupied at the time
by the bed plate at the one or other end of its stroke. Where the paper is
supplied from a roll, it is led between two rollers, thence over a tension roller, over
a roller at the edge of the platen, across the latter, over a roller at other end of
the platen, over an adjustable distance roll whose purpose is to adjust the length of
the way which the paper must pass over before reaching the shears, between two
other feed rollers, and lastly to the shears which sever it into sheets. The two
pairs of feed rollers are connected by chain gear to move equally, and one pair is
driven by ratchet and pawl gear from a rack and pinion gear operated by a cam
on the main shaft so as to shift the paper after each two printings or as otherwise
arranged.
The shears may be operated by gear from an inclined plane on the back of the
bed plate on which the forms are fixed, and returned by a counterweight.
In duplicating the machine, two such movable bed plates are arranged and
preferably suspended by chains one from the other, these chains passing over a
beam with chain wheels in the upper part of the machine. The mechanism moving
one plate thus operates also the other. The same camshaft may operate the two
platens, the four inking devices and the paper feeds, the latter being arranged so
that the face printed by the two forms on the one plate is towards the platen on
the other plate.
Referring to the accompanying drawings which serve to explain the invention;
within the two side supports and upon the rollers a the plate bmoves up and down,
this latter carrying the two forms c and c¹. The machine is actuated by the
shaft d, the cog wheel e which gears with the cog wheel e' moving the crank
shaft i, i'.
When the crank wrist i¹ moves round the axis of shaft i, the rod surrounding
the wrist lifts and lowers the lever g. This lever g carries at its end g' the con-
necting rod h, and this latter at ¹ carries the plate causing the same to move up
and down over the rollers a.

page_text: Upon the crank shaft in the side of the disc wheel & a cam path or groove k is
arranged.
The rod / that carries the platen m is partly guided by a loop surrounding the
shaft i and a roller n on the rod / which engages in the cam groove k. Consequently
on every revolution of the crank shaft the cam groove draws the platen twice onto
the plate, once on to the form c once on to the form c'. The curve k, the roller n
and the rod may be made in duplicate and arranged symmetrically between
and near the frame supports.
b
Each of the two forms c and e' on the plate 6 possesses its own inking train.
Both of the inking trains are of the same kind as those used in cylinder-printing
presses. There are two firmly fixed inking rollers o³, to each inking rollers o also
one inking roller o³, one rocking roller o, ink cylinder and ink reservoir_s.
Longitudinally beneath the plate b a rack bar is placed which is not shown on the
drawing.
By the aid of this rack bar two cog wheels firmly fixed on the wheels p and p¹
are moved to and fro. By means of two chain gears the main rollers o of the
inking trains are moved by said wheels.
On the head of each of the inking rollers o a crank is provided on which two
rods and are mounted. The rod q' rotates, by the aid of a pawl and ratchet
wheel, the inking roller which takes ink from the ink troughs. The rod q serves
to impart motion to the rocking roller o*.
The inking rollers o' are journalled in a framing which is kept in position by
means of links on the arms of two shafts, these shafts being placed opposite each
other on each side of the machine and so as to be parallel to the direction in which
the table moves.
To these shafts a to and fro oscillating motion around their axis is imparted by
the connecting rods t which are at one end connected by ball joints arranged
eccentrically on the wheels p and p' and at the other end terminate in spheres held
between parallel radial arms on the arbor t'.
With the exception of the rollers o³ and of all of the inking and other rollers are
journalled at their ends in the two side frames.
The paper is guided over the rollers u fixed on the two ends of the platen and
supplied from the paper roll, the paper entering underneath the platen.
Rollers v, v, guide the paper to the platen, and similar ones draw it off from
the platen. Both systems of rollers are rotated simultaneously by means of a
chain gearing of equal velocity.
which is fixed on the cog
and this latter is on each
Movement of the paper
The system of rollers is actuated by a pawl
wheel wo; this cog wheel to engages a toothed sector
revolution of the machine swung to and fro once.
consequently only takes place when the sector w³ rotates the cog-wheel w³ in that
direction in which the pawl on the cog-wheel takes with it the ratchet wheel w'.
A guide rod is attached to the sector w at a radius of variable length. This
rod has a loop surrounding at its other end the crank shaft i. A cam y arranged
eccentrically to this crank shaft moves the guide rod z and thus actuates the paper
feed mechanism. A lever having a weight r arranged on it causes the return
movement of the toothed sector w³.
The roller u² merely serves to stretch the paper strip or band between the two
feed systems. The roller u is arranged on two arms u which are adjustable in
their length and fixed on to the side frames. By this roller the paper can be
regulated in such way as to register exactly at the place where it is to be cut off by
the shears.
Behind the second system of rollers, on each revolution of the machine, the
shears, consisting of the blades z and ', close and thus cut off a printed portion of
the paper strip.
A roller, arranged at the end of a single armed lever moves over an inclined.
plane. on the under part of the plate 6 as soon as the plate b moves upward,
whereby the guide rod linked to the end of the lever draws the double angular.

page_text: lever 2* out of its resting position, this latter pushing the blade z¹ of the shears over
the cutting edge of the blade z.
The cut off sheet of paper then drops into the tray. On the downward movement
of the plate b the roller on the lever passes underneath the inclined plane b³.
The counterweight on the lever causes the shears z 2¹ to open again.
The platen can be turned over at the front so as to allow access to the form and
type when the machine is to be adjusted.
By exchanging the eccentric y for a double eccentric the paper after each single
printing motion can be advanced, whereby only one printing ink is then applied.
The platen, which, according to Fig. 1 is attached immediately on the looped
rod and which moves vertically up and down toward the forms can, by the
construction shown in Fig. 3, be turned on and off the forms with an angular
movement. The looped rod then engages with and acts on 'a side lever 1. The
platen itself is capable of oscillating on the trunnions m³ which are fixed ou the
side of the frame supports. The side lever is connected with the platen by
the pin m. As the levers and are thus fixed in their movements to a circle
around the trunnion m² and by the curve with the loop over the arbor i, the side
lever embraces the trunnion by means of a loop, this trunnion being surrounded
by a cross head block. The curve k guides the rollern upon the rod into two
positions of a very short radius against the shaft i. These positions correspond to
the two impressing motions of the platen against the two forms c and c.
these two positions there exists another with a medium radius. This latter
corresponds to the slightly turned off position of the platen in which the forms are
changed beneath the platen.
Between
Opposite the middle radius 9 the curve k possesses a track of large radius.
When the roller n stands in this radius the platen is then in its farthest position
from the plate b (Fig. 3). In this position single sheets of paper can be placed
upon it to be printed on.
A sheet holder m³, by spring pressure, is held against the platen surface when
the platen is in its middle position. When the platen is in its farthest position, the
said sheet holder clears the platen surface for laying on and drawing off the sheets.
Over this self turning platen paper taken from rolls may also be passed.
On Sheet 2 of the drawing the inachinery is illustrated built double, rear to rear.
The two plates 6 are suspended at opposite ends of a chain passing over a roller
arranged in the upper part of the framing so that when the one of the plates is
raised, the other will sink and vice versa. Both of the platens are pressed by means
of one cam shaped curve nearly at the same time against the two respective forms
on the plates b.
The two systems of rollers for guiding the paper are arranged one on each of the
sides of the machine, thus leading the paper in such a way that the one side of the
paper will receive the impression of the forms on one side of the machine, and the
other side the impression of the forms on the other side of the machine; there-
upon one pair of shears cuts off the portion or strip of paper printed upon both sides.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A double ink platen printing press having a bed plate for receiving forms
reciprocating in the plane of its surface and operated by lever and crank gear from
a rotary shaft and a platen movable to and from said bed plate at the two limits of the
travel of the latter and operated through guide rods by a cam about said rotary
shaft.
2. In the said double ink printing press the feed rollers u, v, and vol adapted
respectively to feed the paper from a roll over one edge of the platen and draw off
the paper over the other edge of the platen.
3. The combination with the movable bed plate of the fixed inking rollers o³, o³,
and the inking trains substantially as described.

page_text: 4. The construction for operating the shears from and by the movement of the
bed plate substantially as set forth.
5. The construction for operating the platen substantially as described and
illustrated with reference to Fig. 3.
6. A double ink platen printing press having two bed plates counterbalancing
one another and suspended from opposite ends of a chain passing over a roller or by
similarly operating connection, whereby they may be alternately raised and
lowered for the purpose of bringing either of two forms on each respectively into
the pressure field of two platens operated from a shaft between the bed plates.
7. The combination with two bed plates and two platens as described of paper
feed rollers at one side of the machine and draw off rollers at the other side for
passing paper under the platens in the manner specified.
Dated this 20th day of September 1894.
R. HADDAN,
Of the Firm of Herbert Haddan & Co.,
18, Buckingham Street, Strand, London, W.C., Agent for the Applicant.