IMPROVEMENTS IN TYPOGRAPHIC PRINTING APPARATUS
Year: 1866

page_text: PROVISIONAL SPECIFICATION
left by the said William Clark at the
Office of the Commissioners of Patents, with his Petition, on the 24th
January 1866.
I, WILLIAM CLARK, of 53, Chancery Lane, in the County of Middlesex,
Engineer and Patent Agent, do hereby declare the nature of the said Inven-
tion for "IMPROVEMENTS IN TYPOGRAPHIC PRINTING APPARATUS," to be as
follows:-
This Invention relates to improvements in typographic machinery, and
especially to the manner in which the printing is effected, and in the method
of producing the to-and-fro motion of the slabs and cylinders used in such
operation, whereby a doubly increased speed may be obtained. In ordinary
machines the "form" is generally placed on a cast-iron table termed the slab,
which receives to-and-fro motion by means of a rack attached to the same,
and during the to-and-fro motion of the slab the "form" passes alternately
under one or more cylinders, according to the arrangement of the machine;
the impression being effected on the one side of the sheet when travelling in
[Price 8d.]

page_text: the one direction, and on the other side during the return movement. In
those machines where the slab has continuous to-and-fro motion the cylinders
are fixed, that is to say, simply turn in suitable stationary bearings, the form
being fed up to them in order to produce the impression.
In the improved apparatus of this Invention illustrated in the accompanying
Drawings is shown more particularly a method of obtaining a continuous to-
and-fro motion of the slab and cylinders in opposite directions. The cylinders
instead of being fixed as in ordinary for the form to pass under, are rendered
movable and move over it in order to produce the impression. The advan-
tage of this method is immense, as by it the speed of the machine may be
doubled, for if in ordinary in order to print a sheet of a certain size the slab
has to travel a distance of five feet, for example, the rack alone must produce
the motion, as the cylinders being fixed the form requires to pass under them,
while in the apparatus of this Invention the slab has only to travel one-half of
the above distance of five feet, or two feet six inches only, while the cylinder
being movable would be advanced the other half of the course in front of the
slab, and the two united furnish the total of five feet necessary for the
developement of the form to be printed.
This Invention is illustrated in the accompanying Drawings, showing
different double-action typographic machines constructed according to this
Invention.
Figs. 1, 2, and 3, show an arrangement of book machine in which double
speed is attained; Fig. 4, front view and longitudinal section of a lubricating
bearing of the movable rods.
Figs. 5 and 5, Sheet 2, show an arrangement of newspaper machine
capable of throwing off six thousand five hundred copies per hour; Fig. 6,
Sheet 2, shows a similar kind of machine with four cylinders for printing
10,500 copies per hour.
Fig. 7, Sheet 3, shows an arrangement of machine intended especially for
illustrated journals, and otherwise. In all these machines I employ the
mechanical arrangement represented in Sheet 1. The dotted lines 1, 2, in
the Figures mark the centres of the machines, one half only of each is shown,
the two parts being precisely alike as regards their fixed parts.
The slab a serving to cary the form is set in motion by a rack b, which in
its turn receives motion from a pinion c fixed on a shaft in connection with
the driving shaft d. (This arrangement is the same as in ordinary typographic
apparatus.) On each side of the rack b, and parallel therewith, I place a
rack e gearing with a pinion f carried by a stud g on the fixed frame h of the
machine; said pinion also gears with a rack in the reverse direction, and

page_text: carries to the left the cylinders k, k, and parts fixed on the movable frame i,
which run on a series of friction rollers I, 1. This traverse in opposite
directions enables the rack b to be diminished one-half of its length, so as to
obtain a greater length of traverse of the form to be printed, and so obtain
about double an increase of speed in the machines and in the work done per
hour. The printing cylinders k, k, receive rotary motion from a series of
bevil wheels c, n, o, p, q, r, s, in communication with the driving shaft g, and
mounted on shafts t, u, v, by means of toothed wheels x, y, keyed on said
cylinder gearing with each other and with wheel s. The cylinders k, k,
have a continuous to-and-fro motion, which is effected by two cheeks 1, 2,
depending from the movable shaft j, and between which said wheel turns, the
latter running during the rotation of shaft v in a groove 3 made throughout its
length. The cylinders k, k, having continuous to-and-fro motion, and pro-
ducing the impression alternately, each of them also requires raising alternately
to prevent an impression taking place on the passage of the form. For this
purpose two friction rollers 4, 4, are mounted in bearings 5, 5, carrying the
axes of cylinders k, k, these bearings 5, 5, being fitted to rise and fall in the
movable frame j; other friction rollers 6, 6, are also mounted on this frame.
Between rollers 4, 4, and 6, 6, is fitted a bar 7, having at each end an
inclined plane 8, 9; a spring 10 is fixed to the movable frame, its two arms
pressing on the under side of the axes of the rollers 4, 4, forcing them to
run on inclined planes 8, 9, and thus tending to raise the cylinders k. The
part 7 being always carried at the same height by the rollers 6, 6, and being
pressed up to the latter by rollers 4, 4, partakes in the to-and-fro motion of
the movable frame, and at the terminaion of each course abuts against a
fixed stop 11 placed at each side of the machine, which prevents its further
rectilinear movement, while the frame continues its motion; from this
arrangement it results that one of the rollers 4 descends the inclined
plane 9, and lowers one of the cylinders k, while the other roller 4 rises on
the inclined plane 8, and so raises the other cylinder k. In the return. move-
ment of the movable frame it will be readily understood the reverse effect is
produced. 12, small pinion keyed on the axis of one of the cylinders k, and
imparting rotary motion to the toothed wheels 13, 14, the axes of which are
each furnished with a cam, the first actuating a gripper for seizing the sheet,
while the other acts on another gripper which opens and engages said sheet in
a gripper depending from the other cylinder k, and worked by a cam mounted
on a toothed wheel 15, which is in its turn driven by a small pinion 16 keyed
on the axis of this cylinder k. This arrangement of cams and gearing for
working the grippers used for conducting the sheet may be substituted by

page_text: Cams 17, 17, nxed on an upper frame 18, and actuated by the to-and-iro
motion of the cylinders.
Two-cylinder machine, Figs. 5 and 5bis, Sheet 2.-This machine has the
same double action and works at a doubly increased speed like the one just
described. In ordinary newspaper printing machines the racks for turning the
cylinders are fixed to the slab, and are geared with said cylinders by means of
toothed wheels keyed on their axes. In this machine, on the contrary, the
racks 19 for turning the printing cylinder 20 are fixed to the framing 21, and
the pinions keyed on the axes of these cylinders are of half the diameter of
the said cylinders, so that when the slab has travelled a distance of, say, 20
inches, the cylinders having advanced 20 inches along the fixed racks 19 will
have furnished 40 inches of total traverse, that is to say, the distances travelled
in reverse directions by the slab and cylinders. This new arrangement permits
of the rack being diminished one-half of its length, which is ordinarily carried
by the slab, and also to dispense with some of the intermediate wheels for
communicating motion from one cylinder to the other. Motion is com-
municated to the registering cylinders 22 carried on the moveable frame 23 by
shaft 24, on the ends of which are keyed two pinions 25 gearing with the
pinions on the registering cylinders; this shaft receives rotary motion from the
driving shaft 25 through a vertical shaft 26 and bevil pinions 27, 28, 29, 30.
The pinion 30 is retained by two cheeks 31, and shaft 24 participates in the
to-and-fro motion of the moveable frame 23. The delivery of the sheet is
effected by means of two eccentrics in combination, the one 32 serving to
depress the part 33 for acting on the sheet, while the other 34 determines the
precise instant at which said part shall touch the sheet and carry it with it.
The large rocking levers 35 conducting the tapes, and serving for entering
and delivering the sheets oscillate and follow the cylinders in their traverse.
The levers 36 serve as stretchers and regulate the tension of the tapes during
the oscillating motion of rocking levers 35.
Four-cylinder machine, Fig. 6, Sheet 2.-This machine has the satne
double action and works at the same speed as the one represented in Sheet 1.
The rack communicating motion to the cylinders 37, 38, 39, 40, is also fixed
to the framing, and I employ two rocking levers similar to those shown at
Figure 5, marked 35, but which I have omitted in this Figure. With these
4 cylinders the delivery of the sheet is also effected by means of combined
eccentrics 41, 42, one pair being placed on each side of the machine, and the
two other pairs at the upper ends of the rocking levers. The eccentrics
serving to take the sheet from the cylinders 37 and 40 are worked by gearing
42, 43, 44, from the registering cylinders 45 of printing cylinders 37 and 40.

page_text: 46 are the registering cylinders of cylinders 38 and 39, from which the sheet
is conducted to the upper end of the rocking levers. In this machine it
will be seen there are two mechanical receivers for the sheets from the
cylinders 38 and 39, which are placed at the top of the large rocking levers;
there are also two hand receivers for the sheets from cylinders 37 and 40, but I
may dispose four mechanical receivers, one for each printing cylinder. It will
be understood that this arrangement of machine having four cylinders con-
structed and arranged according to this Invention working at a doubly
increased speed and with a double action a considerably higher number of
sheets may be turned out than in ordinary machines, and amounting to 10,500
copies per hour.
Blank printing machine, Fig. 7, Sheet 3.-This machine has only one
cylinder 47, and is also of double action and works at double speed. The
cylinder represented on the left hand of the Fig. indicates the position of the
right-hand cylinder at the further end of its course. In this machine the
movement of the cylinder is produced by means of a rack 48 mounted on the
slab. In the position occupied by the right-hand cylinder the sheet is first
gripped at top by the grippers 49 to be printed in blank, and is then delivered
to the mechanical receivers which conduct it to the tapes 51. When the
cylinder is at the opposite end of its course, and in the position shewn at the
left hand of the Figure, a second sheet is seized and printed in blank during
the traverse of the movable carriage in a contrary direction to the first, and
then delivered to the other mechanical receiver. The rocking lever or con-
ductor 50 carries two arms serving to guide the sheet on its exit, when released
by the grippers until it enters on tapes 51 conducting it to the mechanical
receiver (not shown in the Drawings). When the printing cylinder passes
from the position it occupies on the right hand towards the left for a second
sheet the conducting lever 50 always passes to the left by means of a toothed
segment 52 and pinion 53, in order to permit of a free passage for the sheet
after its seizure by the grippers, and also to conduct it to the tapes of the
second mechanical receiver. When the cylinder returns from left to right,
the sector 54 acts in concert with a pinion on the same axis as 53, in order to
move the rocking lever conductor from left to right. The arms of the sectors
form bent levers, and by the movable frame bear against the inclines 54, 54¹,
which thus effect their movement. The grippers 49 are actuated by cams 55
and levers 56. The bent levers 58, by sliding on the movable inclined planes
59, which are themselves acted on by the cams 60, cause the grippers to open
for delivering up the sheet to the tapes which guide it on to the mechanical
receiver. All these cams receive motion by means of a series of toothed

page_text: wheels 61 in connection with the driving shaft. The machines represented 'in
Sheet 2 print at the rate (the one with two cylinders) of 6,500 copies per hour.
The same mechanical principle may also be applied to journal presses with a
single cylinder, which would throw off 3,800 per hour.
In Fig. 4, Sheet 1, I have represented a front view and section of a bearing
for the movable rods forming a grease box, and consisting of a small chamber
closed by a plate fixed by screws, and in which the oil is placed.
It will be understood that the cylinders having continuous to-and-fro motion
the tapes serving to conduct the sheets require to. participate in their motion;
for this purpose I employ rods fixed on the framing, and also movable rods
connected to the movable frame; these rods are combined in such manner that
the tapes are diminished on one side of the cylinders and increase on the other,
I am thus enabled to preserve the same total length of the tape.
The Invention thus consists in the application of the mechanical arrange-
ment represented in Sheet 1 of the Drawings to all kinds of typographic
machines having one or more cylinders, for the purpose of increasing their speed,
and their consequent production as compared with existing apparatus, they
being of double action and working at double speed.
I also claim the peculiar arrangement of each of the machines herein-before
described and represented.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Clark in the Great Seal Patent Office on the 24th July
1866.
TO ALL TO WHOM THESE. PRESENTS SHALL COME, I, WILLIAM
CLARK, of 53, Chancery Lane, in the County of Middlesex, Engineer and Patent
Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fourth day of January, in the year of our Lord
One thousand eight hundred and sixty-six, in the twenty-ninth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said William Clark, Her special licence that I, the said William Clark, my
executors, administrators, and assigns, or such others as I, the said William
Clark, my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the Channel

page_text: Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN TYPOGRAPHIC
PRINTING PRESSES," a communication to me from abroad by Alexandre Yves
Gaveaux, Mechanician, of 29, Boulevart St. Martin, Paris, upon the condition
(amongst others) that I, the said William Clark, my executors or administrators,
by an instrument in writing under my, or their, or one of their hands and seals,
should particularly describe and ascertain the nature of the said Invention,
and in what manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Clark, do hereby declare the
nature of the said Invention, and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement,
reference being had to the Sheet of Drawings hereunto annexed, and to the
letters and figures marked thereon (that is to say):-
This Invention relates to improvements in typographic machinery, and
especially to the manner in which the printing is effected, and in the method
of producing the to-and-fro motion of the slabs and cylinders used in such
operation, whereby a doubly increased speed may be obtained. In ordinary
machines the form is generally placed on a cast-iron table termed the slab,
which receives a to-and-fro motion by means of a rack attached to the same,
and during the to-and-fro motion of the slab the form passes alternately under
one or more cylinders, according to the arrangement of the machine, the
impression being effected on the one side of the sheet when travelling in the
one direction and on the other side during the return movement. In those
machines where the slab has continuous to-and-fro motion the cylinders are
fixed, that is, they simply turn in suitable stationary bearings, the form being
fed up to them in order to produce the impression.
In the improved apparatus of this Invention illustrated in the accompanying
Drawings is shown more particularly a method of obtaining a continuous to-
and-fro motion of the slab and cylinders in opposite directions. The cylinders,
instead of being fixed as in ordinary for the form to pass under, are rendered
movable and move over it in order to produce the impression. The advantage
of this method is immense, as by it the speed of the machines may be doubled,
for if in ordinary in order to print a sheet of a certain size the slab has to
travel a distance of five feet, for example, the rack alone must produce this
motion, as the cylinders being fixed the form requires to be fed up to them.
while in the apparatus of this Invention the slab has only to travel one-half
of the above distance of five feet, or two feet six only, while the cylinders being
movable would be advanced the other half the course in front of the slab, and

page_text: the two united furnish the total of five feet necessary for the developement of
the form to be printed.
This Invention is illustrated in the accompanying Drawing, showing
different double-action typographic machines constructed according to this
Invention.
Figures 1, 2, and 3 show an arrangement of book press in which double
speed is attained; Figure 4, front view and longitudinal section of a lubri-
cating bearing of the movable rods.
Figures 5 and 5 bin show an arrangement of a newspaper or journal press
capable of throwing off six thousand five hundred copies per hour; Figure 6
shows a similar kind of press with four cylinders for printing ten thousand five
hundred copies per hour.
Figure 7 shows an arrangement of press intended especially for illustrated
journals, and otherwise. In all these Figures I employ the mechanical
arrangement represented in Figures 1, 2, and 3. The dotted lines 1, 2, in
these Figures mark the centres of the presses; one half only of each is shown,
the two being precisely alike as regards their fixed parts.
The slab a serving to carry the form is set in motion by a rack b, which in
its turn receives motion from a pinion c fixed on a shaft in connection with the
driving shaft d; this arrangement is the same as in ordinary typographic
apparatus. On each side of the rack b, and parallel therewith, I place a rack e
gearing with a pinion
carried by a stud g on the fixed frame h of the
machine; said pinion also gears with a rack i carried by the movable
frame supporting the cylinders k, k, and other parts. In this manner when
the slabs carrying the form move to the right the pinion f, receiving motion
from rack e imparts motion to rack i in the reverse direction, and carries to
the left the cylinders k, k, and parts fixed on the movable frame j, which runs
on a series of friction rollers 1, 1. This traverse in opposite directions enables
the rack b to be diminished one half of its length, so as to obtain a greater
length of traverse of the form to be printed, and so obtain about double an
increase of speed in the machines or in the work done per hour. The
printing cylinders k, k, receive rotary motion from a series of bevil wheels
c, n, o, p, q, r, s, in communication with the driving shaft d, and mounted on
straps t, u, v, by means of toothed wheels x, y, keyed on said cylinder k,
gearing with each other and with wheels, the cylinders k, k, having a con-
tinuous to-and-fro motion; the wheel s also requires to participate in such
motion, which is effected by two cheeks 1, 2, depending from the movable
shaft i, and between which said wheel turns, the latter running during the
rotation of shaft vin a groove 3 made throughout its length; this arrange-

page_text: ment of the several racks and pinions serving to move the slab and cylinders
in opposite directions forms the principal object of the present Invention. The
cylinders . k, having continuous to-and-fro motion, and producing the
impression alternately, each of them also requires raising alternately to prevent
an impression taking place on the passage of the form. For this purpose two
friction rollers 4, 4. are mounted in bearings 5, 5, carrying the axes of
cylinders k, k; these bearings 5, 5, being fitted to rise and fall in the movable
frame j; other friction rollers 6, 6, are also mounted on this frame. Between
rollers 4; 4, and 6, 6, is fitted a bar 7, having at each end an inclined plane
8, 9. A spring 10 is fixed to the movable frame, its two arms pressing on
the under side of the axis of the rollers 4, 4, forcing them to run on inclined
planes 8, 9, and thus tending to raise the cylinders k. The part 7 being
always carried at the same height by the rollers 6. 6. and being pressed up to
the latter by rollers 4, 4, they partake in the to-and-fro motion of the movable
frame, and at the termination of each course abuts against a fixed stop 11
placed at each side of the machine, which prevents its further rectilinear
movement, while the frame continues its motion. From this arrangement it
results that one of the rollers 4 descends the inclined plane 9 and lowers one
of the cylinders k, while the other roller 4 rises on the inclined plane 8 and
so raises the other cylinder k. In the return movement of the movable frame j
it will be readily understood the reverse effect is produced. 12, small pinion
keyed on the axis of one of the cylinders k, and imparting rotary motion to
two toothed wheels 13, 14, the axes of which are each furnished with a cam,
the first actuating a gripper for seizing the sheet, while the other acts on
another gripper which opens and engages said sheet in the gripper depend-
ing from the other cylinder k, and worked by a cam mounted on a toothed
wheel 15, which is in its turn driven by a small pinion 16 keyed on the axis
of this cylinder . This arrangement of cams and gearing for working the
grippers used for conducting the sheet may be substituted by cams 17, 17.
fixed on an upper frame 18, and acting on the to-and-fro motion of the
cylinders.
Two-cylinder machine, Figures 5 and 5-This machine has the same double
action and works at a doubly increased speed like the one just described.
In ordinary newspaper or journal printing machines the racks for turning the
cylinders are fixed to the slab, and are geared with said cylinders by means
of toothed wheels keyed on their axes. In this machine, on the contrary, the
racks 19 for turning the printing cylinders 20 are fixed to the framing 21, and
the pinions keyed on the axes of these cylinders are of half the diameter of
said cylinders, so that when the slab has travelled a distance of, say, 20 inches,

page_text: the cylinders having advanced 20 inches along the fixed racks 19 will have
furnished 40 inches of total traverse to the distance travelled in a reverse direc-
tion of the slab and cylinders.
This new arrangement permits of the rack being diminished one-half of its
length which is ordinarily carried by the slab, and also to dispense with some
of the intermediate wheels for communicating motion from one cylinder to the
other. Motion is communicated to the registering cylinders 22 carried on a
movable frame 23 by a shaft 24, on the end of which are keyed two pinions
25 gearing with the pinions on the registering cylinders; this shaft receives
rotary motion from the driving shaft through a vertical shaft 26 and bevil
pinions 27, 28, 29, 30. The pinion 30 is retained by two cheeks 31, and
shaft 24 participates in the too-and-fro motion of the movable frame 23. The
delivery of the sheet is effected by means of two eccentrics in combination, the
one 32 serving to depress the part 33 for acting on the sheet, while the other
34 determines the precise instant at which said part shall touch the sheet and
carry it with it. The large rocking levers 35 conducting the tapes and serving
for entering and delivering the sheets oscillate and follow the cylinders in
their traverse. The levers 36 serve as stretchers, and regulate the tension
of the tapes during the oscillating motion of rocking levers 35.
Four-cylinder machine (Figure 6).-This machine has the same double
action and works at the same speed as the one first described. The rack
communicating motion to the cylinders 37, 38, 39, 40, is also fixed to the
framing, and I employ two rocking levers similar to those shown at Fig. 5,
marked 35, but which I have omitted in this Figure. With these four
cylinders the delivery of the sheet is also effected by means of combined
eccentrics 41, 42, one pair being placed on each side of the machine, and
the two other pairs at the upper ends of the rocking levers. The eccentric
serving to take the sheet from the cylinders 37 and 40 are worked by gearing
42, 43, 44, from the registering cylinders 38 and 39, from which the sheet is
conducted to the upper end of the rocking levers. In this machine it will be
seen there are two mechanical receivers for the sheets from cylinders 38 and 39,
which are placed at the top of the large rocking levers; there are also two
band receivers for the sheets from cylinders 37 and 40, but I may dispose four
mechanical receivers, one for each printing cylinder. It will be understood
that this arrangement of machine having four cylinders constructed and
arranged according to this Invention working at a doubly increased speed and
with a double action, a considerably higher number of sheets may be turned
out than in ordinary machines, and amounting to ten thousand five hundred
copies per hour,

page_text: Blank printing machine (Figure 7).-This machine has only one cylinder
47, and is also of double action and works at double speed. The cylinder
represented on the left hand of the Figure indicates the position of the right-
hand cylinder at the further end of its course. In this machine the move-
ment of the cylinder is produced by means of a rack 48 mounted on the slab.
In the position occupied by the right-hand cylinder the sheet is first gripped
at top by the grippers 49 to be printed in blank, and is then delivered to the
mechanical receiver which conducts it to the tapes 51. When the cylinder is
at the opposite end of its course, and in the position shown at the left hand of
the Figure, a second sheet is seized and printed in blank during the traverse
of the moving carriage in a contrary direction to the first, and then delivered
to the other mechanical receiver. The rocking lever or conductor 50 carries
two arms serving to guide the sheet on its exit when released by the grippers
until it enters on the tapes 51 conducting it to the mechanical receiver (not
shown in the Drawing). When the printing cylinder passes from the posi
tion it occupies on the right hand towards the teft for a second sheet the con-
ducting lever 50 also passes to the left by means of a toothed segment 52 and
pinion 53, in order to permit of a free passage for the sheet after its seizure
by the grippers, and also to conduct it to the tapes of the second mechanical
receiver. When the cylinder returns from left to right the sector 54 acts
in concert with a pinion on the same axis as 53, in order to move the rocking
lever conductor from left to right. The arms of the sectors form bent levers,
and by the movable frame bear against the inclines 54¹, 541, which thus effect
their movement. The grippers 49 are actuated by cams 55 and levers 56.
The bent levers 58 by sliding on the movable inclined planes 59, which are
themselves acted on by the cams 60, cause the grippers to open for delivering
up the sheet to the tapes which guide it on to the mechanical receiver. All
these cams receive motion by means of a series of toothed wheels 61 in con-
nection with the driving shaft. The newspaper machines before described
and represented print at the rate (the one with two cylinders) of six thousand
five hundred copies per hour, and the one with four cylinders of ten thousand
five hundred copies per hour. The same mechanical principle may also be
applied to journal presses with a single cylinder, which would throw off three
thousand eight hundred per hour.
In Figure 4 I have represented a front view and section of a bearing for
the movable rods forming a grease box, and consisting of a small chamber closed
by a plate fixed by screws, and in which the oil is placed.
It will be understood that the cylinders having continuous to-and-fro motion
the tapes serving to conduct the sheets require to participate in this motion;

page_text: for this purpose I employ rods fixed on the framing, and also movable rods
connected to the movable frame; these rods are combined in such manner that
the tapes are diminished in length on one side of the cylinders and
increased on the other, I am thus enabled to preserve the same total length
of tape.
Having described the nature of this Invention, and the manner of performing
the same, I declare that what I claim as the Invention to be protected by the
herein-before in part recited Letters Patent is, the mechanical arrangement
represented in Figures 1, 2, and 3 of the Drawings, for producing continuous
to-and-fro motion in opposite directions of the slab and cylinders, which
improvement is applicable to all kinds of typographic machines, whether to
book, blank, or journal presses, having one or more cylinders for the purpose
of increasing their speed, and their consequent production as compared with
existing apparatus, these improved machines being of double action and work-
ing at double speed.
I also claim the peculiar arrangement of each of the machines herein-before
described and represented, reserving the right of increasing or diminishing the
number of parts for transmitting motion or otherwise.
In witness whereof, I, the said William Clark, have hereunto set my hand
and seal, this Twenty-fourth day of July, in the year of our Lord One
thousand eight hundred and sixty-six.
Witness,
JAMES DAISH,
53, Chancery Lane,
London.
W. CLARK. (L.S.)