Improvements in Platen Printing Machines.
Year: 1894

page_text: Date of Application, 23rd Apr., 1894
Complete Specification Left, 23rd Feb., 1895-Accepted, 23rd May, 1895
TROYIDIONAL DE MOITIAIN.
Improvements in Platen Printing Machines.
1, ALFRED GODFREY, of 14, Havergal Villas, Green Lanes, Hornsey, in the
County of Middlesex, Engineer, do hereby declare the nature of this invention to
be as follows: :-
This invention relates to improvements upon feed-gripper platen machines
patented to me under No. 13020 and dated 26th September 1887, and consists of a
modified construction of the platen, platen-back and delivery board thereon; the
side impression rods; the brake and detent gear upon the gripper frame, and
automatic registering devices; the impression throw-off and throw-on, rendered
automatic by the absence or presence of a sheet of paper or other material in the
grippers; the means for the regulation of the flow of ink from the ink duct; the
tilting mechanism of the platen and apparatus interlocking with the starting gear;
adjustable side feed supply boards; means for attachment of the gripper motion
lever to its shaft, and of the platen-beam tilting-strap to the platen beam; and
the spring pressing device upon the inking rollers, & their manner of support.
The effect of these improvements is to allow of a larger quantity of printed
matter being received upon the delivery board, and of its uniform delivery thereon ;-
to permit easy and definite adjustment of the impression;-a more certain and
unalterable register of the paper upon the type, which shall not be impaired by
wear an automatic throw-off and throw-on of the impression by the absence from
or presence of a sheet of paper in the grippers, thus allowing a double or multiple
inking of the forme by the withholding of a sheet for any desired number of
impressions, and preventing the soiling of the tympan when a sheet is not present; -
the regulation of the flow of ink from the duct by the feeder without moving his
position as feeder, and without stoppage of the machine ;-the prevention of accident
by causing the tilting of the platen to prevent the starting of the machine whilst
tilted; the power to adjust the side feed supply boards as to height and position
to feeder, in any desired position; and the better inking effect of the inking rollers
as they pass over the type.
To carry my improvement into effect, I make the platen and platen-back in one
casting, enabling me to use a deeper delivery table, and I add thereto a hinged
spring balanced supplementary table, spring balanced front gauges, and back and
side gauges.
The side impression rods I fit with an adjustable bearing block and hand wheel
towards feeder, so that he can adjust the impression with ease.
To obtain an accurate position of the feed grippers for exact register, I apply a
brake to a drum upon the gripper frame, the brake carriage also engaging a roller
detent into recesses in said drum, and I further apply fixed register steels upon the
frames adjacent to the feed-board and to type-bed, against which the register studs
on the gripper frame come into sliding contact as the grippers take the sheet from
the feed-board and hold it in position for printing, such register being unaltered
by wear.
To cause the impression to throw off or on, according to whether a sheet is fed
into the grippers or not, I apply a balanced trip lever with feeling-finger passing
between the gripper fingers. If a sheet of paper is there present, the said trip
lever operates a device by which the impression is allowed to remain on.
If the

page_text: paper is not there, the trip-lever so operates the said device that the impression is
throw off at the required time, to prevent inking the tympan upon the platen.
The impression is automatically thrown on again after each impression stroke by
the back stroke of the platen-supporting-arm, so that the impression is normally on
at each stroke, if not thrown off by the said trip gear.
To interlock the tilting mechanism with the starting gear, I provide a double
lever on the platen-supporting-arm, the lower part of this lever engaging under the
fork-striking-shaft, when the machine is working, and thus locking the platen in
proper position for printing. When the striking-shaft is moved to throw-off the
belt, the platen is unlocked, and will tilt by a counter balance weight, whilst at the
same time, when the platen is tilted the said lever locks the striking-shaft, and
prevents the minder from starting the machine.
The regulation of the flow of ink from the duct by the feeder, is effected by a hand
lever close to the feed-board, by which the feeder can operate a device that reduces
the travel of the first duct' roller, and thus reduces the amount of ink supplied to
the inking table.
In order that the side feed supply boards may keep the pile of sheets at a uniform
height to the fixed feed board, mount them free to travel perpendicularly by a
foot pedal, and also make them adjustable across the machine so that the boards
may be in a suitable position for "stroking in" the paper.
The inking rollers are pressed upon the inking slab and the form by indirect
spring pressed levers, so adapted, that the effective pressure is as great or greater
when the rollers are on the forme than when on the inking slab, and I mount the
rollers on centres in a carriage connected to the spring pressing mechanism by a
swivel pin at each side of carriage.
To ensure more rigid attachment of the gripper motion lever to its shaft, and of
the platen-beam-strap to the platen-beam, I use, in addition to the ordinary key, a
transverse bolt or bolts through a split in the boss of the said lever or of the strap,
the bolt or bolts thus giving the lever and strap a firm frictional grip upon their
respective shafts.
may apply pieces upon the chase or other convenient part adjoining the forme,
on which the inking rollers run, in order that the inking rollers may be lifted from
such part of the forme as it is not desired should be inked.
I may apply also a small swivel crane upon the bed of the machine near to the
type-back, to lift the heavy chase and forme, in and out of place.
Dated this 23rd day of April 1894.
FELL & WILDING,
1, Queen Victoria Street, London, E.C., Agents for the Applicant.
Improvements in Platen Printing Machines.
1, ALFRED GODFREY, of 14 Havergal Villas, Green Lanes, Hornsey, in the
County of Middlesex, Engineer, 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 :—
My invention consists of an improved form of construction of my platen printing
machine, as patented to me under No. 13020 and dated 26th September 1887, in
which the rotation of grippers about the axis of the platen-back is an essential
feature. The present improvement relates to a modified construction of the platen;
platen-back, and delivery board thereon; the side impression rods; the brake and
detent gear, upon the gripper frame, and automatic registering devices; the
impression throw off and throw on, which is rendered automatic by the absence or

page_text: presence of a sheet in the grippers; the tilting mechanism of the platens, and
apparatus interlocking with the starting gear; the means for the regulation of the
flow of ink from the ink-duct; adjustable side feed supply-boards; means for
attachment of gripper-motion-lever to its shaft, and of the platen-beam-tilting strap
to platen beam; and the spring pressing device upon the inking rollers.
The effect of this improvement is to allow of a larger quantity of printed matter
being received upon the delivery boards and its uniform delivery thereon; to
permit easy and definite adjustment of the impression, and more certain and
unalterable register of the paper upon the type, which shall not be impaired by
wear; an automatic throw-off and throw-on of the impression by the absence or
presence of a sheet from or in the grippers, and thus allowing a double or multiple
inking of the forme by the withholding of a sheet for any number of impressions
as may be desired, and preventing the soiling of the tympan where a sheet is not
present; the regulation of the flow of ink by the feeder, without moving from his
position as feeder, and without stoppage of the machine; the prevention of accident
hy causing the tilting of the plater to prevent the starting of the machine whilst tilted;
the power to adjust the side feed supply boards as to height and lateral position as
to the feeder, so that the feeder may work from the supply of paper in any desired
position; and the better inking effect of the inking rollers as they pass over
the type.
And in order that my invention may be the better understood, I now proceed to
describe the same, reference being had to the drawings hereto annexed, and to the
letters and figures marked thereon:
Figure 1 is a detail side elevation of the combined platen-back and platen, and
spring-balance-delivery table thereon.
Figure 2 is an end elevation of the same.
Figures 3 and 4 are detail end and side elevations, of the adjustable side
connecting rods.
Figure 5 is a part side elevation of the gripper-frame drum, brake, and detent,
and registering steel at feed-board.
Figures 6 and 7 are enlarged end and side elevations of the spring pressed
grippers.
Figures 8 and 9 are part similar elevations, showing feeling mechanism to
throw-off impression, interlocking striking gear, and the platen in position for
printing, and tilted, respectively.
Figure 8 is an enlarged detail of part operative mechanism for throw-off and
thrown-on of impression.
Figure 9 is an enlarged end view of the ratchet wheel of said mechanism.
Figures 10 and 11 are part side and end elevations, showing duct roller
regulator, and adjustable supply boards.
Figures 12 and 13 are side and part end elevations of the spring pressing device
for inking rollers.
Figure 14 is a detached plan of inking rollers and supporting carriage.
In Figures 1 and 2, A is a combined platen and platen-back, made in one casting,
instead of as formerly in separate pieces connected by bolts and screws, to allow of
the delivery table B being considerably lowered within the travel of rotation of the
grippers around the axis of the platen-back.
This modification admits, by the omission of the usual screws and nuts connecting
the platen and platen-back together, of a much deeper delivery table, which will
accommodate a larger quantity of printed sheets before it is filled.
As the sheets have however in this arrangement a considerable distance to fall
I mount a supplementary table 6 on the delivery-board B.
This supplementary table is pivoted on two swivel pins a one on each side of the
table, the outer part of the table, receiving the printed sheets, being balanced by
springs C, controlled by hand lever c and adjusting quadrant c¹ according to the
size and weight of paper. On the same swivel pins a is mounted a pair of levers D,
carrying the back gauge d, and kept up in position as shown by the spring di

page_text: against a stop x. By this arrangement the back gauge d (removed in Figure 2)
will yield, and prevent injury to the hand of the operator, should he attempt to
remove the printed sheets from the delivery-board or from the grippers, whilst
the machine is in motion.
The front gauge d' is adjustable in a slot on the delivery board, so that it can
be set as regards the back gauge to any length of paper. I provide also wing
guides d³ mounted on a shaft passing through the said front gauge to control the
fall of the printed sheets side-ways.
I apply also a pad-brake G to the platen eccentric shaft, which partly rotates to
throw off the impression, in a manner hereinafter described, the pad brake being
set up by a spring g and set screw 9', to prevent the impression coming off with
a shock and to keep the eccentric in its proper position, whilst the impression
is on.
I connect the usual operating crank shaft E of the machine with the platen
shaft N, by two connecting rods e, one on each side of machine, shown in detail in
Figures 3 and 4, which are of such modified construction, as will enable, the
operator to easily adjust the length of the connecting rod centres, and thus the
required pressure of the platen upon the forme. This adjustment may be readily
made by marked gauge wheel for each job, to suit the class of work.
One end of each connecting rod e is a plain hole bearing, which works on the
crank pin, but in the other end a sliding block e' fitting the end of platen-eccentric-
shaft is fitted in the slotted end of the rod.
The said block e¹ is adjusted in position by a screw e pressing the block against
a spring e³.
The screw spindle e is provided with a sleeve F with notched flange f and fixed
to the screw spindle e by a set screw_fl. When the main screw e is screwed up
for maximum impression, the sleeve F, being then loose, the sleeve is fixed by the
set screw, so that the screw e may be turned around easily by hand to reduce or
increase the impression in any required degree, within a complete turn; the
various fractional positions of the turn, being determined by a pin f' and
corresponding holes in the sleeve.
This adjustment can be effected whilst the machine is at work, the hand-wheel
or flanged sleeve being at the ends of the connecting rods nearest to the feeder.
"
In order to obtain accurate position of the grippers, or register of the sheets,
when taken off the feed board H (Figure 5) and when printed upon the "forme
of type, I apply a brake J to a drum ; of large diameter fitted to the gripper
frame.
The brake pressure is derived from a cam j', shown in detail Figure 5, operating
a rocking lever, at the further end of which is a spring pressing upon a
carriage hinged to the platen-supporting-arın P, which also carries the brake
slipper.
The other end of the carriage carries a roller which engages as a detent into
recesses in the periphery of the drum j. The operation of this compound brake
and detent, is, that the first movements of the rocking lever through the spring³,
is to apply a pressure upon the hinged brake slipper J, through the medium of the
spring pressed pin, which arrests the momentum of the gripper arms by brake friction
upon the drum affixed thereto. As a further consequence of the continued
motion of the lever the roller is pressed home into the recesses of the said
drum j.
An adjustable set screw is used on the underside of the brake slippers J, and
meets the top of the spring pressed pin to take up the wear of the brake leather,
so that the play and compression of the spring about * remains constant.
An index finger L³ shows the amount of wear of the brake leather, and allows
the minder to accurately take up the said wear by means of the set screw 3 and
thus to maintain the required brake pressure. Alternatively I may use separate
cams and levers to operate the brake and detent gear respectively.
When the gripper comes to the feed board in the lowest position, to take a sheet

page_text: therefrom, the register stops i fixed to gripper frames come home upon the inclined
faces of the fixed steel or steels fixed to the frame near at the feed table with
the same face as they do at the upper register steel, fixed to the frame near the
upper part of the cylinder, (Figures 6 and 7). Any wear therefore upon the
register stops has the same effect both at the feed board and at the type bed or
forme, so that the register of the sheet remains unaltered.
The action of these register steels upon the frame above the forme, and the
steel ¹ upon the frame at the side of the feed board are identical in their reaction
against the stops i upon the grippers and serve, (by the final reciprocating motion
of the platen-supporting-arm in its opposite travels, causing the gripper stops, to
slide upon the said fixed register steels,) to complete the motion of the gripper
arms about the platen axis, to an accurate register, in a more perfect manner than
could be effected by the complete movement being caused only by the known pawl
and lever driving mechanism.
.
To cause the impression to throw off or thrown on, according to whether a sheet
is fed into the grippers or not, I apply a balanced trip lever K Figures 8 and 9,
provided with an adjustable balance weight k and parts ¹³ & k rigidly connected
therewith and pivotably mounted upon the rocking-platen supporting arms P; the
said trip-lever has a tail-piece k', sliding upon a fixed race, the counter-balance
weight being so adjusted that tail k always rests upon the said race, except when
prevented by the paper in the gripper. The tail-lever has also a feeling finger k
and a pawl arm k with two projecting fingers and operating a ratchet or
toothed wheel L on the frame, provided with a crank pin, and a connecting rod P,
operating an arm pivoted on the frame.
When a sheet of paper is held in the gripper M, the feeding finger Arises
against the said sheet of paper, as the tail picce slides upon the race *. If the
paper be present in the grippers the feeling finger k is arrested in its travels, and
the pawl arm is held depressed in the position shown in Figure 8, the lower
projecting finger k of the arm strikes the stud L' on the lower part of the
ratchet wheel L; and, as the rocking platen-supporting-arms P continue their
travel towards the type-back, the said pawl arm eventually causes the upper
finger to engage into the lower slot of the ratchet wheel Land produces, by
partly rotating the said wheel L, a downward pull upon the rod 1.
The fingers and 4 of the arm are in different planes, the first engaging in
the slots of the ratchet wheel L, and the latter either striking against or riding over
the stud L' projecting from the face of the ratchet wheel L.
If no paper is present in the grippers, the feeling finger rises between the
fingers of the gripper, as shown in Figure 9; the pawl arm krises with it, so that
the lower finger k of the arm k, mounting on the stud L' of the ratchet wheel L
causes the upper finger of the arm k, to engage with the upper notch of the
crank ratchet wheel L on the upper side of its axis, and produces a thrust upwards
of the rod .
The turning action of the ratchet wheel L is aided and completed by the
pressure of the spring pawl L³, sliding down the inclined face of the notches into
which it engages after the action of the arm has started the movement of the
ratchet wheel L in the required direction. The rod is connected to an arm
pivotted on the frame, to which is attached a spring-arm ; a loose arm l', also
pivotted on the same pivot upon the frame, rests normally upon the spring arm
and the upwards and downwards movement of the rod l' is communicated directly
only to the spring arm 1, the arm following the movement of the said spring-arm,
when it is free to do so. This arrangement is necessary, because the throwing on or
off of the impression, by reason of the presence or absence of a sheet in gripper M,
as shown, must not take place until the impression next following the immediate
impression.
The platen shaft N has its crank pins n by which the impression is communicated,
arranged eccentrically to the axis of the said shaft, and the impression is thrown off
or on, in the usual way, by the partial rotation of the platen shaft, altering the

page_text: position of the eccentric crank pin. This is effected in this machine as follows.
The platen eccentric shaft, has a cog wheel n¹ fitted upon it, and a rack n³, sliding
in a groove in platen-supporting-arm, gears therein. When the eccentrically placed
crank pin n is in the position as shown in solid lines, Figures 8 and 9, the brake
apparatus, previously described, serves to keep the eccentric shaft home in position
as shown, the rack thus travelling with the rocking platen-supporting-arm without
a sliding motion thereto. When the loose arm is in its lowest position, resting
upon the spring arm the loose arm meets the end of the rack n³, as in Figure 8,
which being thus arrested, whilst the platen beam travels forward, operates the cog
wheel n in the platen eccentric shaft, which is thus partially turned an! the
impression is thrown off. When the loose arm is in its highest position as in
Figure 9, it has been lifted out of the way of the said rack, by the tension of the
When
spring previously operated by the bar and the impression remains on.
13
the rack has been thus pushed back, and the impression thrown off, it slides by
means of a pivotting lug upon the spindle , pivotted to the frame, and when the
platen-supporting-arms fall back to their farthest position from the forme, the nuts
upon the end of the spindle bring up the rack again to normal position as
shown in dotted lines in Figures 8 and 9 and thus throw on the impression
once more.
The loose arm, lifted by the spring arın 13 into its bighest position, then lies
upon the rack, and does not arrest it, and engages also with the end of the rack
when in its lowest position, so that the loose arm does not follow the lift, and
drop off the spring arm 3, until the second impression after the movement of the
said spring arm by the rod 1.
By this automatic throw-on and throw-off of the impression, double or treble
inking, or any desired amount of inking of the forme can be effected, by merely
anissing the feed of one, two or more sheets, alternately with the sheet that is to be
printed; and should a sheet be missed by the feeder the automatic throw-off
prevents the type from soiling the tympan.
In the same Figure 9 is shown the arrangement by which the striking-band-fork-
shaft of the machine is locked, whilst the platen is being tilted for the purpose of
making ready, and when the platen is in position for printing, the starting-band-
fork-shaft locks the tilting gear, as shown in solid lines, Figures 8 and 9, so that
the platen cannot be tilted whilst the machine is running. The gear has also a
counter-balance weight to balance the weight of the platen on its axis for easy
turning, and which also serves to balance the weight of the platen and platen-
supporting-arms in its reciprocating movement about the lower pivot pin or bearing.
This is carried out as follows.
To one of the platen-supporting-arms P, I attach a pivotted quadrant arm p
which has an upper straight arm pl resting against a shoulder of the platen tilting
When the
strap V, when the platen is down in its correct position for printing.
straight arm p' is in this position, the quadrant arm p passes under the shaft pof
the striking-strap-fork, which projects beyond the framing, when the strap is on
the fixed pulley, and thus locks the arms p and p¹ in position, and, consequently, the
platen in proper position for printing. When the striking fork is moved over to
the loose pulley, and the machine stopped, the shaft p2 is drawn back flush with the
framing, and the pivotted quadrant arm p is released, so that the platen may be
tilted the shoulder of the platen tilting strap V pushing the straight arm plover,
and thus lifting the quadrant arm p, until the latter covers the end of the striking
gear shaft p shown in Figure 9.
When the platen is thus tilted for making ready, the striking on gear and
shaft p cannot be moved, until the platen is back in its position for printing, and
the quadraut arm p falls back into its normal position, uncovering the striking gear
shaft p².
To make the tilting of the platen easy, I connect the platen back A by a rod a
to a bell crank a³ mounted on the end of platen-supporting-arm shaft, provided with
-a counter balance a. This counter-balance weight fulfils a double purpose of both

page_text: balancing the weight of the platen for tilting, and also balances the weight of the
platen-supporting-arms P, and platen A, in their reciprocation about the bottom
pivotting shaft. I effect the regulation of the flow of ink from the ink duct by the
feeder without movement from his place, and without stopping the machine, by
connecting the loose sleeve guard Q, Figures 10 and 11 on the ratchet wheel of
the first duct roller q, by a rod q' to a hand lever q', pivotted on the frame near
the feeder, and controlled as to its position by a notched quadrant q fixed on the
framing, and by a pawl q. The duct roller q, taking the supply of ink from the
duct, receives an intermittent rotary motion from the rocking shaft R, by
the connecting rod r, and pawl collar r, and pawl. The said connecting rod r
is provided with a handle and rests by its weight only by a gab,-mounted upon the
pin of the rucking shaft R. The rod r may thus be lifted from the pin and worked
by hand, to set the duct before starting the machine. The sleeve ratchet guard.Q
can be adjusted by the band lever q' to cover any desired number of teeth in the
ratchet wheel gl, so as to prevent the feed pawl from engaging therewith, until
it has slipped off the guard. The actual rotation of the duct roller q* against the
ink duct, may thus be reduced, from full travel to any intermediate amount of travel,
that may be desired by the position of the hand lever q*.
In order that the supply boards S, supporting the supply of paper may be
adjustable to any position as to the feeder, and to any height, I mount the supply
board S on a spindle s, capable of vertical up and down movement, the board in
any desired position being locked by the rack and fingers. To easily lift the
board as the supply pile is reduced, I attach the said spindles by a chain or cord,
passing over a pulley, to a treadle, by which the feeder can lift the supply board
at any time by foot pressure.
The whole frame, and supply table spindle, can be traversed across the front
of the machine, to any required position to the feeder, by sliding them upon the
horizontal bars st.
The inking rollers T, Figures 12 and 13, passing round and over the inking drum
or slab T, and the forme T', are caused to press upon the surface of the forme to.
ink the same, where they are nearest to the centre of rotation, as is important, with
as great, or a greater pressure, than compared with that, by which they press upon
the inking drum ;-by means of the following device.
The rollers T T are hung by centres to, in carriages, in pairs, the pin axles t of
the carriages being engaged under hooks of the sliding slabs working in radial
guides t. A pin and roller on such sliding slab is pressed inwards towards the
centre by one end of a lever t, the other end of which receives a thrust from a
spiral spring. The whole device rotates with the rollers, being driven by gearing,
from the main motion shaft in the usual way. The relative position of the spring
pressed lever, spring, sliding slab and roller carriage, when the rollers are on the
forme, are shown in dotted lines, from which it will be seen that although the
springs in this position have weakened by extension, the levers t³ exert a greater
mechanical effect. Should it be desired that the inking rollers should not touch.
certain parts of the forme, I apply attached pieces y, Figures 12 and 13, fastened
to the chase, and overhanging the railt upon which the bearing rollers of the ink
rolls travel, so that the inking rollers are lifted from the forme at such points.
To ensure more rigid attachment of the gripper motion lever U, to its shaft, and
of the platen-beam tilting-strap V to the platen-beam, in addition to using the
ordinary key v, I split the boss of the said lever U, and also divide the strap V,
itting bolts v', through the said splits to draw the bosses close together to grip
heir respective shafts frictionally, shown in Figures 5 and 8.
Having now particularly described and ascertained the nature of my said inven-
ion and in what manner the same is to be performed, I declare that what I
laim is :-
1st. In a platen printing machine, in combination with feed grippers rotating.
bout the axis of a platen, a platen-back and platen made in one piece, a fixed and

page_text: supplementary hinged delivery board thereon, adjustable side impression rods, a
brake and detent gear upon the gripper frame, registering fixed steels upon the
frames adjoining the forme and feed board, an automatic throw-on and throw-off
device operated by a balanced feeling finger, in the presence or absence of paper in
the grippers, the balanced tilting mechanism for platen, interlocking with starting
gear, means (operated by feeder) regulating flow of ink from duct, adjustable sile
feed boards, means for frictional attachment of parts to shafts, and spring lever
pressing device upon the inking rollers, their supports, and lifting pieces.
2nd. In a platen printing machine, the combination with feed grippers, rotating
about the axis of a platen, of a platen-back and platen, made in one piece, and a
delivery board thereon, close to platen shaft, substantially as and for the purposes
described.
3rd. In a platen printing machine, a hinged and spring balanced supplementary
delivery board upon the fixed delivery board, a spring balanced hinged back gauge,
and an adjustable front gauge, with side wings, substantially as and for the purposes
described.
4th. In a platen printing machine, adjustable side impression rods, connecting
platen beam to operating crank shaft, one end of such rod having a sliding bearing
block adjustable in slot of rod by screw in longitudinal axis of rod, against reacting
spring, a sleeve fixed thereon, by set screw, having a notched flange for hand
adjustment, and a pin and holes in said sleeve for variable setting, substantially as
described.
5th. In a platen printing machine the combination with feed grippers, rotating
about the axis of a platen, of a recessed drum upon gripper frame, an adjustable
brake-shoe and hinged carriage, a roller detent on said carriage, engaging in
recesses on said gripper-frame-drum, the brake and detent gear being operated by
the same or by different levers and cams, on first motion shaft, substantially as and
for the purposes described.
6th. In a platen printing machine, an index finger on brake-shoe spindle to show
the amount of wear on the brake leather, substantially as described.
7th. In a platen printing machine, the combination with feed grippers, rotating
about the axis of a platen, of registering studs, upon one or both sides of said
grippers, and registering fixed steels upon the frames adjoining the feed board
and the forme-bed, the same registering studs being used to meet and slide
upon both the said registering fixed steels, substantially as and for the purposes
described.
8th. In a platen printing machine the combination with feed grippers, rotating
about the axis of a platen, of an eccentric pin on the said platen shaft, engaged by
impression connecting rod, a cog wheel on said shaft with sliding rack thereon, a
detent arm hinged on frame, operated to miss or strike the said rack, a spring
armed lever, hinged at the same point on frame, operating the detent arm, a ratchet
wheel on frame, and connecting rod, operating said spring arm, a balanced pawl
arm hinged on balanced supporting-platen-arm, operating said ratchet wheel in
conjunction with a spring pawl, and a feeling finger being a part of said pawl arm,
and a tail-piece travelling on fixed race, controlling position of said pawl-arm to a
certain point, by absence or presence of paper in grippers, to automatically throw
off and on the impression, substantially as described.
9th. In a platen printing machine, the combination with feed grippers, rotating
about the axis of a platen, of feeling fingers, pivotably mounted on the platen-
bearing-arm, and operating, by the presence or absence of a sheet of paper in said
feed grippers, any means for the throw-on or throw-off of the impression.
10th. In a platen printing machine a part quadrant and straight arm lever,
pivotted upon the rocking supporting arm of said platen, a shoulder on platen beam
tilting strap engaging with straight end of said lever, and the strap-fork-striking-
shaft, engaging with quadrant end of said lever, to form an interlocking gear
between the platen tilting mechanism, and the strap starting gear, substantially as
and for the purposes described.
:

page_text: 11th. In a platen printing machine, a ratchet wheel and pawl feed, operated by
a gab lever from the crank shaft reciprocating the said platen, a guard sleeve over
said ratchet wheel, a hand lever rod and notched quadrant, fixed to frame near feed.
board for adjustment of same by feeder without leaving his place, substantially as
and for the purposes described.
12th. In a platen printing machine the combination with feed grippers, rotating
about the axis of a platen, of a inclined feed board from which the said grippers.
take the paper, and side adjustable supply feed-boards, a foot treadle lifting the
same vertically in guides (to keep the paper at one height to the said feed board).
and horizontal rods, on which the said supply boards slide across the machine,.
substantially as and for the purposes described.
13th. In a platen printing machine, inking rollers (rotating by gearing from first
motion shaft round tho inking drum) and carriages, carrying said rollers in centres.
in radial guides, attached pieces for lifting rollers from parts of formne, and levers
pivotted on roller wheels and pressed by springs, adapted so as to give, as great, or-
a greater pressure upon the inking rollers, when on the flat forme face, than when
on the cylindrical inking drum, substantially as described.
14th. In a platen printing machine, inking rollers, mounted on carriages by set-
screw centres, so that the said rollers may revolve more easily by their peripheral
friction upon the forme, substantially as described.
Dated this 21st day of February 1895.
FELL & WILDING,
1, Queen Victoria Street, London, E.C., Agents for the Applicant..