CERTAIN IMPROVEMENTS IN "
Year: 1881

page_text: LETTERS PATENT to Alfred Godfrey, of 44, Beech-holme Road, Clapton, in the
County of Middlesex, for an Invention of "CERTAIN IMPROVEMENTS
IN
"
"
PROVISIONAL SPECIFICATION left by the said Arthur Godfrey at the
Office of the Commissioners of Patents on the 23rd December 1881.
ALFRED GODFREY of 44 Beech-holme Road Clapton in the County of Middlesex.
CERTAIN IMPROVEMENTS IN LITHOGRAPHIC OR LETTER PRESS PRINTING
MACHINES."
This Invention relates more particularly to improvements in that class of printing
machines employed for taking lithographic or letter press impressions from a stone
or type surface travelling underneath an impression cylinder known as the cylinder
machine certain portion of such improvements hereinafter described being also
applicable to the printing machine known as the platen.
Firstly The object of this Invention relates to improvements in the means
employed for propelling the travelling bed supporting the lithographic stone or type
from which the printed impressions are taken. According to the method now
adopted the tables or beds of printing machines of the description herein referred
to are usually propelled by a crank and connecting rod or by the old well known
mangle motion" videlicet a double rack driven by a pinion the said rack being
arranged to move from one side of the pinion to the other, at the termination of
each traverse (so as to allow the pinion to gear with its teeth on its opposite surface
for reversing the traverse) or remain stationary in which case the pinion driven
through the medium of an universal joint is caused to adjust its position so as to
gear either with the under or upper teeth of the rack, the objections to the first
of these motions videlicet the crank and connecting rod is that the table or bed does
not move at an even and uniform speed throughout its traverse by reason of the
rectilinear motion being obtained by means of the uniform revolution of a crank
the result is that the table is travelling at its quickest speed during the time it is
passing under the impression cylinder videlicet when the crank is passing over its top
or bottom centre and its slowest when reversing its motion when passing its hori-
zontal centres. It is well understood in the trade that when printing, the type and
paper receiving the impressions require to remain in contact a certain length of
101

page_text: time in order that the ink from the type shall be properly transferred to the paper
it therefore follows that a machine cannot be run above a certain speed to do good
work when the crank and connecting rod are employed; it is therefore obvious that
if the bed or table by other mechanical means is caused to travel at one uniform
speed throughout its entire motion, the machine will produce more work, and at the
same time never attain a higher speed than that which is given to it when driven
by the said crank and connecting rod.
The mangle, or rack motion herein referred to overcomes the difficulty of uneven
or irregular traverse but such motion as at present constructed is very lumberous,
noisy in operation liable to get out of order and subject to breakages.
According to this portion of my improvements I employ a rack and pinion so
arranged that instead of a pinion moving on an universal joint or a heavy rack
moving from side to side of the pinion at the time the motion of the table is
reversed I employ for example a radial arm mounted on a shaft supporting the
driving wheel the opposite or vibrating end of this arm supports in suitable
bearings the pinion driving the rack through the medium of the driving wheel
the effect of which is that through the mechanical action of the vibrating arm
and pinion an easy uniform and silent motion is transmitted to the rack and
table.
Secondly These improvements relate to an arrangement of apparatus which I
employ for automatically removing the sheets of paper, as they are printed imme-
diately the impression cylinder has stopped for the return motion of the bed and
placing such sheets with their printed sides uppermost or exposed for inspection on
the-usual-taking-off-board-without-interfering-with-the-feeder,-this-I-accomplish-in-
either of two ways.
According to the first arrangement the "grippers" employed for taking hold of and
releasing the sheets of paper I construct with a spring and a projecting tappet, the
spring keeps the gripper closed whilst holding the paper, and the tappet when
acted upon by fixed curves suitably placed first opens the grippers preparatory for
taking hold of the sheet of paper when passing from the cylinder and secondly
when the paper is being laid on the taking off board. The grippers taking hold of
and releasing the sheets of printed paper secure to one end of an arm which I
call the gripper arm this arin is supported on a stud or pin carried by a bracket
running on an inverted path or bed dovetailed or otherwise this bracket carrying
the gripper armn is caused to traverse to and fro along the said inverted path by
means of a connecting rod and radial arm which receives motion from a crank or
other equivalent. The said gripper arm is provided at its shorter end on the opposite
side of its supporting pin from the grippers with a friction roller, this roller by
reason of the opposite length of arm being heavier is kept during the traverse of
the sliding bracket constantly in contact with a fixed cam surface, so that when the
slide supporting the gripper arm is receeding or falling back from the cylinder, the
curved surface of the fixed cam causes the said grippers, to describe whilst traversing
the segment of a circle, this motion combined with the opening and closing of the
grippers herein described carries the sheet taken off the cylinder right over the
taking off board, at which time whilst the grippers are returning and whilst making
their semi-circular motion towards the cylinder the jaws of the grippers are open
at a time which allows the sheet of paper to be released and laid on to the said
board with its printed side exposed for inspection; or in lieu of the foregoing
arrangement I employ a modification of the same in which the grippers after
having taken hold of the paper and drawn it from the cylinder do whilst per-
forming their downward segmental motion give a twist or half turn to the paper,
and then release it so as to fall on the taking off board with its printed side up or
exposed, this is accomplished by providing the sliding bracket herein referred to in
the first arrangement with a quadrant rack and the gripper arm with a pinion
which when the said arm is swinging round gears into the teeth of the fixed rack
and so gives the shaft or ariu supporting the grippers a half turn in the manner and
for the purpose described,

page_text: Thirdly these improvements relate to a new method of inking the type
whereby large or small formes are equally covered with ink without the employ-
ment of extra inkers and riders and also obviating generally the necessity of
double inking.
In carrying out this portion of my Invention I proceed as follows. I dispense
with the usual flat inking table or slab and use in lieu thereof a cylinder placed in
direct contact with the forme rollers the said cylinder I provide with a wheel
which gears into other gearing receiving motion from and driven by the rack of
the table or bed, the wheel so driven being of such a diameter that it travels exactly
at the same surface speed as the type the advantage thereby secured is that the
distribution of the ink is going on all the time the machine is moving. Whereas
when the flat inking table or slab is used the distribution is only effected whilst
the table is passing under the rollers, further the forme rollers being in contact
with the ink cylinder which is revolving at the right surface speed prevents all
dragging, and jumping of the rollers over the forme as they do when they depend
only on the friction of the runner wheels on the runner rails which is one reason
why the speed of the machine is limited and cannot perform the amount of work
it otherwise could I provide for a variable transverse motion or vibration of the
distributors through the medium of a cam which keyed on the shaft or spindle
of the ink cylinder, and a slotted lever with an adjustable fulcrum. The relative
position of the lever and cam are such when arranged for working, that the
vibration of the distributors can be altered at will, as also can the vibration of the
riders on the forme rollers. When it is desired to run the machine without inking
the forme I proceed as follows. The inking cylinder and forme rollers are carried
in one frame and hinge on the shaft which carries the pinion driving the inking
cylinder; the whole of which I raise through the medium of a snail cam and lever
out of contact with and clear of the type.
Fourthly. The object of this Invention is to enable the printer to regulate the
supply of ink in any quantity required to any part of the forme surface according
to the job in hand.
According to the practice now adopted it is usual to cut away the surface of the
composition feeding roller at those places where blanks or a reduced amount of
ink is required to be fed to the forme. The said cutting away of the roller as
mentioned is in consequence of the printer not having sufficient control over the
supply of ink issuing from the duct.
In order to obviate the above mentioned objection I proceed as follows: I
construct the blade or knife of the said ink duct regulating the supply of ink on
the ink roller, passing to the inking cylinder in sections each section being operated
or acted upon by three set screws the arrangement of which are such that one will
exert a pressure which will hold the section of knife it is in contact with back
from the ink roller, and the other two will press it forward, I also provide a series
of supplementary knives which are made to fit and rest upon the inclined surface
of the lower or ordinary knife, these supplementary knives are movable and can be
placed in any situation required on the lower knife their position when adjusted
being maintained by a second set of set screws. By the employment of the said
supplementary knives the ink supply can be regulated or cut off where required
independently of the ordinary duct knife. The uses of the said supplementary knives
will be more clearly understood by the description herein after contained. The
duct I also construct for enabling the machine to print in several colors at one and
the same time, this I accomplish by means of movable division plates which are
kept in position by the same arrangement of set screws employed in connection
with the supplementary knives the said knives being used when the multi-color
divisions interfere with the proper use of the ordinary duet knives or when required
to cut off the supply at points where the duct knife proper is not applicable. The
duct roller I place at a suitable distance from the inking cylinder hercin described
and place in the space intervening a composition roller supported in slides which
will allow it to travel so as to carry the ink from the duct to the ink cylinder.

page_text: This travelling of the composition roller between the duct and ink cylinder for the
purpose mentioned is accomplished by means of a tappet cam acting upon the
composition roller as follows. The said cam is provided with a finger which is
acted upon by a projecting piece secured to the travelling bed, the action of this
projection when passing under the cam finger in one direction raises the cam out of
contact and allows the composition roller through the action of a spring to come
into contact with the ink cylinder and then as the motion is reversed the
projecting piece on the bed acts upon the cam finger in a manner which forces the
composition roller back in its slides into contact with the duct roller where it
receives its next supply of ink for transferring to the ink cylinder; it is evident
that the projecting piece acting on the cam finger if long or short will determine
the time the composition roller is kept in contact with the duct and so offer a
further means for regulating the supply of ink:
In order that the printer may be enabled to dispose the colors side by side in
distinct lines or to blend them one with the other in widths as required I employ
rollers of different widths adjustable on a spindle and give them a traverse for
distributing their several colored inks as required the said rollers being actuated
and regulated in their traverse by the cam and lever giving the differentential
throw herein described.
Fifthly The invention relates to the method adopted for damping the stone in
lithographic printing machines and consists in placing a box or trough containing.
water at the rear of the machine. In this box so as to be partly immersed in the
water are two rollers one at either end over and around which is extended an
endless-band-or-apron-composed of absorbent material. I also place in the same
trough and in a line with the horizontal axes of the before-mentioned-rollers-a-
third roller supported in sliding bearings connected with a screw which enables
the said third roller to exert an adjustable pressure against the absorbent endless
apron the effect of which regulates the amount of moisture transmitted to the
stone motion being transmitted to the said rollers by means of a pawl and ratchet
wheel the endless band occupies the same place as the ordinary damping board
and the usual rollers supply the water to the stone, or in lieu of the roller
regulating supply plates or slabs independently acted upon may be employed.
Sixthly. The Invention relates to a means I employ for easing the strain on the
teeth of the rack and driving mechanism giving the traverse to the table or bed
and also to deaden or ease the shock which inevitably takes places when a heavy
mass of metal moving in one direction requires to be suddenly reversed such as
the table or bed of a printing machine. In carrying out this portion of my
invention I support one or more iron rods or bars in a line with the traverse of
the table or bed and in a position which will adinit of a boss or projection from
such bed sliding freely on the said rods in a space intermediate to the ends thereof.
These rods at their opposite ends are provided with coiled springs of different
tensions the weaker springs taking thein positions near to the sliding boss
projecting from the table, and the stronger ones at the outside or opposite ends of
the said bars or rods, the separation between the weaker and stronger springs being
effected by means of a sliding collar; thus it will be seen that when the table is at
work moving in one direction will before completing its traverse bring its projecting
boss encircling the said bars first into contact with the weaker or smaller springs
and then as it advances to the termination of its throw (being then checked) it will
meet the resistance offered by the stronger springs and will thus be fully checked
and so prevent any undue strain on the mechanism whilst being reversed. The said
bars at their extremity are provided with a screw thread and lock nuts which act
against a collar abutting against the springs so that when the said nuts are screwed
up against such collars the tension of resistance given by the springs can be
regulated according to the different speeds at which the table is caused to travel.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Arthur Godfrey in the Great Seal Patent Office on the 22nd June
1882.
ALFRED GODFREY of 44 Beechholme Road Clapton in the County of Middlesex
"CERTAIN IMPROVEMENTS IN LITHOGRAPHIC OR LETTER PRESS PRINTING
MACHINES."
This Invention relates more particularly to improvements in that class of
printing machines employed for taking lithographic or letter press impressions
from a stone or type travelling underneath a rotating impression cylinder known
as the cylinder machine. Certain portions of such improvements hereinafter
described being also applicable to the printing machine known as the "Platen."
First The Invention relates to improvements in the means employed for
propelling the travelling bed supporting the lithographic stone or type from which
the printed impressions are taken.
:
Second to improvements in the arrangement of apparatus employed for
automatically removing or taking off the sheets of paper as they are printed from
the machine immediately the impression cylinder has stopped for the return motion
of the table or bed supporting the lithographic stones or type.
Third to improvements in the method of inking the type whereby large or
small forms are equally covered with ink without the employment of extra ink '
rollers and riders and also obviating in most cases the necessity of double inking.
Fourthly To improvements which will enable the printer to regulate the supply
of ink in any quantity required to any part of the forme according to the job in
hand.
Fifthly To improvements in the method adopted for damping the stones in
lithographic printing machines, and
Sixthly to improvements in the means employed for easing the strain on the
teeth of the rack, and driving mechanism giving the traverse to the table or bed
supporting the lithographic stone or type, and also to deaden or ease the shock
which inevitably takes place when a heavy weight of metal moving in one
direction requires to be suddenly reversed such as the table or bed of a printing
machine.
In order that the several improvements in printing and lithographic machines
above mentioned may be well understood and explained in detail I have hereunto
annexed three Sheets of Drawings which represent separately each improvement
applied to a printing machine in a manner which will enable them to carry out
the object of their design, letters of reference being marked on corresponding parta
on all the Figs, alike.
DESCRIPTION OF DRAWINGS.
Sheet. 1. Fig. 1, represents a detached elevation and Fig 2 a plan view of
the first portion of these improvements relating to the mechanisın employed for
propelling the travelling table or bed supporting the lithographic stone or type
from which the printed impressions are taken.
According to the method now adopted the tables or beds of printing machines of
the description herein referred to are usually propelled by a crank and connecting
rod or by the old well known mangle motion videlicet, a double rack driven by a
pinion the said rack being arranged to move bodily in narallal divection Gam
A

page_text: allow the pinion to gear with its teeth on its opposite surface for reversing the
traverse) or remain stationary in which case the pinion driven through the
medium of an universal joint is caused to adjust its position so as to gear either
with the under or upper teeth of the rack. The objection to the first of these
motions videlicet, the crank and connecting rod is that the table or bed does not
move at an even and uniform speed throughout its traverse by reason of the
rectilinear motion being obtained by means of the uniform revolution of a crank
the result is that the table is travelling at its quickest speed during the time it
is passing under the impression cylinder videlicet when the crank is passing over
its top or bottom centre, and its slowest when reversing its motion when passing
its horizontal centres. It is well understood in the trade that when printing, the
type and paper receiving the impression require to remain in contact a certain
length of time in order that the ink from the type shall be properly transferred to
the paper, it therefore follows that a machine cannot be run, above a certain speed
to do good work when the crank and connecting rod are employed it is therefore
obvious that if the bed or table by other mechanical means is caused to travel at
one uniform speed throughout its entire motion the machine will produce more
work and at the same time never attain a higher speed than that which is given
to it when driven by the said crank and connecting rod. The mangle and rack
motion herein referred to overcomes the difficulty of uneven or irregular traverse
but such motion as at present constructed is very lumberous, noisy in operation,
liable to get out of order and subject to breakages.
According to this the first part of my improvements as represented at Figs. 1
and 2,1-employ-a-rack-A vibrating on the pivot a and a pinion a' so arranged
that instead of the pinion moving on a universal joint-or-the-rack-moving in a
parallel line from side to side of the pinion at the time the motion of the table is
reversed I employ for example the radial arm a mounted on the shaft a³
supporting the driving wheel at The opposite or vibrating end of the radial
arm a supports in suitable bearings the pinion a' and wheel a driving the rack
through the medium of the driving wheel a the effect of which is that through the
mechanical action of the vibrating arm a² and pinion a¹ in conjunction with the
vibrating movement of the rack A an easy uniform and silent motion is transmitted
to the rack and table.
<
Secondly These improvements relating to the automatic take-off" of the
sheets from lithographic or letter press machines are shewn on Sheet 2 at Figs: 3,
4 and 5. Fig. 3, represents in part elevation that portion of a lithographic machine
to which one arrangement of my improved taking off apparatus is applied. Fig. 4
represents a modification of the arrangement shewn at Fig 3, and Fig: 5
represents a further inodification of the same as applied to letter press printing
machines.
In these Figs b is a wheel provided with a tyre of india-rubber or other suitable
material. This wheel b turns free on its axis and is held in such contact with
the impression cylinder C that when such cylinder is revolving it drives or causes
the wheel to revolve 613 613 are curved pieces of steel or other material secured
to the feed board 6 in Fig, 3 and to the framing din Fig. 5, or these curved
pieces are so held that their points will just clear the cylinder C. The usual form
of grippers travelling with the cylinder are shewn at 62 Fig 3, When the printed
sheet is travelling with the cylinder towards the grippers and just as its edge is
approaching the point where the wheel 6" is in contact with the cylinder C the
curved piece b opens the grippers 612 and so releases the printed sheet at which
time the loose printed sheet is passed by the action of the wheel 6" up the curved
steel piece s into the jaws of the taking off grippers b which are employed for
taking hold of and releasing the printed sheets of paper in the following manner.
The grippers bare constructed with a spring and projecting tappet b¹ the spring
keeps the grippers closed whilst holding the paper and the tappet b' when acted
on by the fixed curve piece 63 suitably placed first opens the grippers preparatory
for taking hold of the sheet of paper when passing from the cylinder C and,

page_text: secondly when the paper is being laid on the taking off board B. The grippers b
taking hold of and releasing the sheets of printed paper I secure to one end of the
arm which I call the gripper arm, this arm b' is supported on the stud or pin 65
secured to and carried by the sliding bracket be running on the inverted path or
bed which is dovetailed or otherwise formed for supporting the said slide 6º.
This sliding bracket carrying the gripper arm is caused to slide to and fro
along the said inverted path by means of the connecting rod 63 and radial arm b
which receives motion from the crank 10 or other equivalent. The gripper arm b
is provided at its shorter end on the opposite side of its supporting pin b with
the friction roller 2 this roller by reason of the opposite and longer length of
the arm being heavier is during the traverse of the sliding bracket kept
constantly in contact with the fixed cam surface b* so that when the bracket
supporting the gripper arm is receding or falling back from the cylinder C into the
position shewn in dots the fixed curved cam surface 6x causes the said grippers b
to describe whilst traversing the segment of a circle, this motion combined with
the opening and closing of the grippers in the manner as herein before described
carries the sheet taken off the cylinder C right over the taking off board Bat
which time whilst the grippers are returning during their semi-circular motion
towards the cylinder are through the medium of the tappet 63 and suitablo
abutment 16 again opened at a time which will allow the sheet of paper held by
them to be released and laid on to the receiving board B with its printed side
exposed for inspection.
A modification of this arrangement is shown at Fig 4 in which the grippers b
after having taken hold of the paper and drawn it from the cylinder C do whilst
performing their downward segmental motion give a twist or half turn to the paper
and then releases it so as to fall free on the taking off board with its printed side
uppermost or exposed, this method of taking off is accomplished by providing the
sliding bracket 6 herein referred to with a quadrant rack c and the gripper arm b
with a shaft and pinion C which when the said arin is swinging round gears into
the teeth of the fixed rack c and transmits to the arm band grippers 6 a half turn,
which by the time the traverse of the gripper slide is completing its throw as
shewn in dots the sheet of printed paper taken off the cylinder has been turned
and placed over the taking off board B with its printed side up or exposed, the
complete traverse of the gripper slide now brings its tappet b' into contact with
the abutment e2 which opens the grippers and so releases the sheet.
:
Fig 5 represents a further modification of this arrangement or "take off"
notion as applied to letter press printing machines in which d is a framing sup-
ported in a diagonal direction above the cylinder C this frame supports the take off
board B rack d¹ grippers b and gripper slide 60, the grippers are caused through
the gearing d or other equivalent motion to slide to and fro during the action of
which and at suitable tiines the tappet b¹ of the gripper is brought into contact
with abutments which cause the said gripper jaws to open and close in manner as
herein before described for taking hold of and releasing the sheets of printed paper
videlicet at the times of withdrawing such sheets from the cylinder C and laying
them one by one on the taking off board B.
The third portion of this Invention relating to the method of inking the type
whereby large or small forms are equally covered with ink without the employ-
ment of extra inkers and riders, and also obviating in most cases the necessity of
double inking is shewn on Sheet 3 at Figs. 6, 7, and 8 in which Fig: 6 represents
in elevation a right hand side view of the ink cylinder and apparatus in connection
therewith.
:
Fig 7 represents in elevation a left hand side view of the same and
Fig: 8 a detached end view of Fig. 7.
In these Figs: c is an inking cylinder which I use instead of the ordinary inking
table or slab, this cylinder e I place in direct contact with the forme rollers f the
said cylinder e I provide with a wheel el which gears into the wheels f' driven by
the rack of the table or bed through the medium of the wheels and shaft g'.

page_text: The wheel e' so driven is of such a diameter that it travels exactly at the same
surface speed as the type the advantage thereby secured is that the distribution of
the ink is going on all the time the machine is moving whereas when the flat
inking table or slab is used the distribution is only effected whilst the table is
passing under the rollers, further the forme rollers being in contact with the ink
cylinder e which is revolving at the right surface speed prevents all dragging and
jumping of the rollers over the forme as they do when they depend only on the
friction of the runner wheels on the runner rails which is one reason why the
speed of the machine is limited and cannot perform the amount of work it other-
wise could, I provide for a variable traverse motion or vibration of the distributors
hh through the medium of the cam i (vide Figs: 7 and 8) which is keyed on the
shaft of the ink cylinder e and the slotted lever with an adjustable roller i
which works in the groove of the cam i. The relative positions of the lever
cam are such when arranged for working that the vibration of the distributors
can be altered at will by moving the roller 22 to the required position in the
slotted lever as also can the vibration of the riders on the forme rollers f which
motion is obtained in a similar manner through the medium of the lever f' and
the movable roller f. When it is desired to run the machine without inking the
form I proceed as follows: The inking cylinder e and forme rollers ff are carried
in one frame and rest on the shaft which carries the pinion driving the
inking cylinder, the whole of which I raise out of contact with and clear of the
type by means of the snail cam m.
"
and
Fourthly That portion of the improvements which will enable the printer to
regulate the supply of ink in any quantity required to any part of the forme
according to the-job-in-hand-is-shewn_more_particularly on Sheets 1 and 3 at
Figs: 6, 7, 9, and 10. Figs. 6 and 7 Sheet 3. are views already referred to in-con--
nection with the foregoing description of the inking apparatus, and in which a
general arrangement and adaptation of the present improvement is shewn. Figs, 9
and 10, Sheet 1, represent enlarged detail views of the duct roller and ink trough.
Fig, 9 being a front elevation and Fig 10 a transverse section. In order that the
advantage accruing from the application of this portion of my improvement in
printing machines may be clearly understood I would remark that according to the
practice now adopted it is usual to cut away the surface of the composition rollers
called vibrators at those places where blanks or a reduced amount of ink is
required to be fed to the forme the said cutting away of the composition as
mentioned is in consequence of the printer not having sufficient control over the
supply of ink issuing from the duct. In order to obviate this objectionable practice
I proceed as follows I allow the blade or knife n of the ink duct to remain as at
present and on the upper inclined surface thereof I place supplementary knives n¹
seen more clearly at Fig 10 Sheet 1. These knives n' are made to fit and rest
upon the inclined surface of the lower or ordinary knife n and are so arranged
that they can be placed in any situation required on the said lower knife their
position when adjusted being maintained and their pressure against the duct roller
regulated by the set screws n² and abutment n. By the employment of the
supplementary knives n¹ the ink supply can be regulated or cut off where required
independently of the ordinary duct knife n, I arrange the vibrator or roller
supplying the ink from the duct to the inking cylinder e as shewn on Sheet 3 at
Figs. 6 and 7 in which o is the duct roller which I place at a suitable distance
from the inking cylinder e and place in the space intervening a composition
roller o supported in bearings sliding in the framing which will allow such
roller o' to travel so as to carry the ink from the duct roller o to the ink cylinder e.
This travelling of the composition roller o' between the duct o and ink cylinder e
for the purpose mentioned is accomplished by means of the tappet cam o
(vide Fig: 6) acting upon the composition roller as follows: The said cam o
is provided with a finger o³ which is acted upon by a projecting piece
secured to the travelling bed or table of the machine carrying the type forme.
The action of the projection o' when passing under the cam finger o³ in one
04

page_text: direction raises or forces the cam o² out of contact with the composition
roller o and allows such roller through the action of the spring o³ to come
into contact with the ink cylinder c and then as the motion of the table is
reversed the projecting pieco o' secured to such table will act upon the cam
finger o³ so as to force the composition roller back in its slide into contact with the
duct roller o where it again receives a supply of ink for transmitting to the ink
cylinder c. It is evident that the projecting piece o acting on the cam finger o³ if
long or short will determine the time the composition roller o' is kept in contact
with the duct and so offer a further means for regulating the supply of ink.
Fifthly That portion of these improvements relating to the method adopted
for damping the stones in lithographic printing will be understood on reference to
Sheet. 1, Figs 11 and 12. In these Figs. p is a box or trough containing water
placed at the rear end of the machine. In this box so as to be partly immersed
in the water are two rollers q q' over and around which is extended the endless
band or apron q2 composed of absorbant material. I also place in this box or
trough (according to the arrangement shewn at Fig. 11) and in a line with the
horizontal axis of the beforementioned rollers, a third roller r supported in sliding
bearings connected with the screw the turning of which enables the said roller r
to exert an adjustable pressure against the absorbant endless band or apron q².
Or the adjustable pressure upon such apron may be obtained by the means of
flat plates 8 acted upon by set screws s' as shown at Fig. 12, the effect of which
vis, either the adjustable roller r or plates s will regulate the amount of moisture
which the apron shall transmit to the stone. The plates t exerting a pressure on
the endless apron after having damped the stone and passing round the roller q'
cleans or removes any "set off" or ink which may have been transferred to the
apron from the stones when passing over the same whilst damping. Motion is
transmitted to the roller q q' driving the apron q2 by means of a pawl and ratchet
wheel or other suitable motion, and the endless absorbant band or apron q2 occupies
the same place as the ordinary damping boards and the usual rollers ( t¹ supply
the water to the stone.
Lastly That portion of these improvements relating to the means I employ for
easing the strain on the teeth of the rack and driving mechanism giving the
traverse to the table or bed and also to deaden or ease the shock which inevitably
takes place when the motion of a heavy weight of metal is being reversed, will
be understood on reference to Sheet 2 Fig. 13.-In carrying out this portion of my
Invention I support one or more iron rods or bars u in a line with and parallel to
the traverse of the table or bed and in a position which will admit of a boss or
projection from such traversing table or bed sliding freely on the said rod or.
bar u in a space intermediate to the ends thereof. The rod or bar at its opposite
ends are provided with coiled springs www w₁ of different strengths, the
weaker springs ww taking their positions near. to the sliding boss. and the
stronger ones w₁ w on the outside or at the opposite ends of the rod or bar u,
the separation between the weaker and stronger springs being effected by means
of loose sliding collars xx, thus it will be seen that when the table is at work
moving in one direction it will before completing its traverse bring its projecting
boss v first into contact with the weaker spring w, and then as it continues to the
termination of its traverso (being then checked) it will meet the resistance offered
by the stronger spring w¹ and thus be fully checked in a manner which will
prevent any undue strain to the driving mechanism when the table is being
reversed; the said rod or bar u at its extremities is provided with screw threads
and lock nuts y. y. which act upon or exert their pressure against the collars z. 3.
abutting against. the springs wo, w' so that when the said nuts are screwed up
against such collars the tension of resistance given by the springs can be regulated
according to the different speeds at which the table is caused to travel.
Having now described the nature of iny said Invention together with the method
of carrying the same into practical effect I would wish it to be distinctly under-
stood in conclusion that what I claim as new and as of my Invention is.―

page_text: First The combination of the radial arm a² pinions a¹, a' and a main driving
shaft a³ and vibrating rack A to be employed in the manner and for the purpose
as herein substantially described, and shown on Sheet 1 Figs 1 and 2 of the
Drawings hereunto annexed.
Second The novel arrangement combination and adaptation to lithographic or
letter press printing machines of the apparatus shewn at Figs: 3, 4, and 5, of the
Drawings to be employed for "taking off "the sheets of paper as they are printed
from the cylinder and passing them with their printed side exposed on the taking
off board in the manner as herein substantially described.
Third. The novel arrangement combination and adaptation to printing machinery
of the inking apparatus shewn at Figs: 6, 7 and 8 of the Drawings annexed
vis: the inking cylinder e cam i and levers and f¹ provided with variable
and adjustable rollers and f2 also the use of the shaft and snail cam m the
whole to be used in the manner and for the purpose as herein substantially
described.
Fourth The novel arrangement and combination of the parts shewn at Figs: 6,
.7, 9, and 10 of the Drawings annexed videlicet the cam o finger o³ travelling piece of
transferring composition roller os also the manner of applying the supplementary
knives in conjunction with the set screws n² and abutment n³ vide Figs: 9 and
10, the whole to be employed for the purpose of enabling the printer to regulate
the supply of ink in any quantity required and also cut off such supply to any
part of the forme in the manner as herein substantially described.
Fifth The novel adaptation to lithographic printing machines of the damping
apparatus-shewn.at. Figs. 11 and 12 of the Drawings to be used in the manner as
.herein substantially described, and
Lastly The novel arrangement combination and adaptation to printing machines
of the compound yielding springs www w bar u, washers xx-,, and lock
muts y, y, shewn at Fig. 13 of the Drawings to be employed for easing the strain
on the teeth of the rack and driving mechanism giving the traverse to tho table
or bed of the printing machine. In order to qualify this claim I wish it to be
understood that I am aware that springs are now used for casing the strain on the
teeth of the rack and for deadening the shock, therefore what I claim as new and
as of this portion of my Invention is the novel combination of the parts herein
substantially shewn and described.
In witness whereof I the said Alfred Godfrey have hereunto set my hand
and seal this the Twentieth day of June One thousand eight hundred and
cigny
Witness:
THOMAS WRIGLEY
75 Chancery Lane W.C.
ALFRED GODFREY. (L.S.)