Improvements in Web Printing Machines.
Year: 1895

page_text: Date of Application, 24th Sept., 1895
Complete Specification Left, 22nd Jan., 1896-Accepted, 18th Apr., 1896
[Communicated from abroad by ARTHUR E. DOWELL, of No. 807 Seventh
Street, Washington, D.C., in the United States of America.]
Improvements in Web Printing Machines.
.
I, OLIVER IMRAY, of No. 28 Southampton Buildings, in the County of London,
Fellow of the Chartered Institute of Patent Agents, do hereby declare the nature
of this invention to be as follows:-
This invention relates to the construction of web printing machines in such a
manner as to combine the advantages of the reciprocating-bed and the locomotive-
cylinder types of web printing presses in a single machine.
The invention is applicable to single or perfecting web presses, and consists
essentially in the combination of reciprocating beds, reciprocating cylinders, and
web feeding devices whereby a web is fed continuously between the beds and
cylinders.
The invention may be carried out in various forms which can be readily devised
when once the principles of construction and operation are disclosed; in what
follows three general forms will be described; first a form shewn in Figures 1 to 4
inclusive, in which two beds move oppositely to each other, and two cylinders
move oppositely to the beds; secondly a form shewn in Figures 5 to 11 inclusive,
in which both beds move in the same direction, and the cylinders move oppositely
to the beds; thirdly, a form shewn in Figures 12 to 15 inclusive, in which the
cylinders and beds operate only in their one stroke.
A single bed and cylinder and web feeding mechanism of any of these could be
adapted to print on only one side of the web. And either of the three forms
could be readily adapted to print twice on the same side of the web for colour
printing.
1 shall describe the first form of machine referring to Figure 1 which is a side
elevation.
Figure 2, a longitudinal central section.
Figure 3, a part transverse section on line 3-3 of Figure 2, and
Figure 4, an elevation of cams O.
Two type beds B, B, are mounted on ways a, a, on the main frame, so as to
reciprocate to and fro. They are shown arranged the one above the other so as to
shorten the press, but their relative position might be varied. Outside the frames
are guides a', for sliding carriages C, C, in which are mounted the impression
cylinders b, b and the systems of inking rolls 1, I. A pinion F¹ on the prime
moving shaft F gears with a wheel D' on shaft D, and D¹ gears with an equal
wheel E on shaft E. By cranks on D' and E' and connecting rods d and e the
two beds B B are caused to reciprocate equally but oppositely.
To the undersides of the bed B B are secured racks g gearing with pinions g',
on shafts G which are journaled in the main frame; pinions G1, on the shafts G
gear with pinions G 2 on shafts G 3, and the pinions G2 gear with racks c, on the
carriages C; so that when each bed B is moved in one direction the carriage C
above it with the cylinder b, and inking rollers I is moved in the opposite
direction. The gearing may be such that the carriage has a greater travel than
the bed.
Ink is unplied from fountaing; ;

page_text: .
The web is led from the paper roll: W between the feed rolls J, up over a
looping roller K, down under a stationary roller L; forward under the lower
cylinder b, (passing over guide rollers c 2, on the cylinder carriage, forward to a
stationary roller L,.up over a register-adjusting roller L 2, back under the upper
cylinder passing over guide rollers c 2 on its carriage, back over a stationary
roller L3, down under a looping roller K', up to the delivery rolls M.
The feed rolls J may be driven by gears J, J, from shaft E so as to feed in
sufficient web for two impressions for each reciprocation of the beds and cylinders;
the rolls M delivering an equal amount of web in the same period; these may be
driven by gearing J 3 and m, from J 2.
The looping rollers K, K', are carried by vertically reciprocating bars k
connected at their lower ends by links k¹, to the free ends of levers N which are
pivoted at their rear ends on the main frame, and are caused to vibrate by camis O,
on the shaft D, these cams being so formed as to give such movements to the
rollers K, K', that they vary the regular feed and delivery of the web so as to
compensate for the irregular demands of the printing mechanisms.
Assuming, for simplicity of illustration, that the sheets to be printed are to be
twenty inches long, and that one quarter of a revolution of the crank wheels
suffices to move the beds the proper distance, 10 inches during the impression;
also that the cylinders move 12 inches in the opposite direction thus passing clear
over a twenty inch forme, the operation of the press of the form shown in
Figures 1 to 4 may be thus described.
With the parts in the position shown in Figure 1, the first stroke of the lower
bed is outward, and that of the upper bed is inward, as indicated by the dotted
arrows, and the looping rollers K, K', are midway of their travels.
During the first strokes of the beds therefore a perfected impression is made on
the web, 10 inches of which are pulled forward with and by the beds at a slightly
irregular feed, this irregularity being compensated for by the rollers K, K',
moved by the cam O, while the rollers n traverse the first quarter 1 of the cam O.
Meanwhile 10 inches of web are fed in by the rolls J and out by the rolls M.
After the completion of the first, and before the beginning of the second
impression, the feed and delivery rolls J and M feed in and draw through the
press 10 inches of web, and the looping rollers K, K, are lowered 5 inches,
causing 10 inches more of web to pass through the press from roller L to
roller L3; the roller n in this period traversing the second quarter 2 of the
cam O; and the parts then reaching the positions shewn in Figure 2.
·
During the returu strokes of the beds, or second impression, 10 inches of web
are pulled back between rollers L3 and L, as demanded by the beds, and at the
same time 10 inches are fed in by rolls J and fed out by rolls M, therefore
rollers K, K¹, are raised 10 inches during this return stroke, roller K¹ giving up
enough web from its loop to supply the back feed of the beds, and the demands of
the delivery rolls; and roller K raises and takes up the 10 inches fed in by the
rolls J and also the 10 inches of web fed back by the beds; during this back stroke
therefore the roller n traverses the third quarter 3 of cam O.
In the interval between the end of the back impression, and the beginning of
the next forward impression, the rolls J feed in 10 inches of web aud the rolls M
deliver 10 inches, the rollers K, K', descend five inches, so that twenty inches of
web pass through the press between rollers L, and L3, while the roller ni
traversing the fourth quarter 4 of the cam O.
The second form of press according to this invention is shewn in Figure 5 which
is a longitudinal section.
Figure 6 a part transverse section through one side, and
Figures 7, 8, 9, 10 and 11 which shew details of the web-looping or compensating
devices.
The type beds A, A¹, are connected together and move 88 one; the
cylinders B, B', are journaled in a single carriage C. The double bed i
reciprocated by connecting rods d from cranks on wheels D, and the cylinde

page_text: carriage is reciprocated simultaneously with, but contrary to, the beds by
connecting rods from cranks on wheels E. The wheels D, E, or their shafts are..
geared together.
The inking rollers I, receive ink from fountains I'.
The web is led from roll W through. feed rolls F, up over a looping roller G, on
vertically reciprocating bars g, down under a guide roll a, forward under bed A, to a
guide roller a, up between the beds over a guide roller a³, then over a guide roller b
down under cylinder B', up over a roller b¹, thence to and over a roller a 3, back and
under a roller a 4, up over a looping roller H, on vertically reciprocating bars h, down
under a roller a 5, over a roller 62, under cylinder B, over a roller 6 3, back to a
roller a 6, down under a looping roller J, on reciprocating bars j, and up to the
delivery rolls f.
The roller a 3 is preferably made adjustable for registering. The rollers b, b'
62, and 3, are mounted on and reciprocate with the carriage C.
The vertically reciprocating bars 9 are connected by link g with levers 92,
pivotted at K, and having friction rollers 9 3. bearing on cams G₁ on shaft K..
The bars carrying the roller J, are likewise connected by links
having friction rollers j3, bearing on cams J¹, on shaft K.
with levers j2;
The cams G, J', (Fig. 9). are substantially identical. in shape, but set on the .
shaft a half turn or 180 degrees apart.
The bars are connected by links h¹ to the ends of levers 2 fulcrumed at / 3,.
and having on their rear ends rollers 4 bearing on. cams H', (Fig. 10) on
shaft K'.
Springs g 4, j4 and 4 prevent the levers from jumping on the cams.
Shaft K is geared to the shaft D' of crank wheel D so as to revolve synchron-
ously therewith, and the feed and delivery rolls. F and fare driven by gearing
from the shaft of either crank wheel.
The second form of machine operates as follows:-
Assuming each sheet to be twenty inches long, the rolls F, should feed in and
out forty inches of web for each complete reciprocation of the beds, that is to say,
enough for two sheets.
During the forward stroke to the right of the beds, the bed A', requires 10 inches*
of web to move with it toward roller a 3, and these ten inches are fed in by rolls E,
but as the movement of the bed A¹ is irregular as compared with that of the rolls F,
the looping roller G worked by the first quarter. of cam G' compensates for the
varying drag of bed. A', which, during. this.. stroke feeds 10 inches of web to
roller H.
At the same time bed A requires 10 inches of web to be fed back with it, and
rolls demand 10 inches for delivery, these are supplied by the looping roller J,
which is raised 10 inches by its cam at such speed as to supply the demands 'of
rolls fand bed A. Bed A therefore during this stroke also feeds 10 inches of web
to roller H, making a total of twenty inches.to be taken up by H as determined by.
'cam H¹.
When the impressions on the forward stroke are completed and while the beds
and cylinders are reversing,. the roller G descends 5 inches, roller Hremains at
rest, and roller. J descends 5 inches; therefore the loopers shift 10 inches of wed in
addition to the 10 inches fed in and out by the rolls F, f, so that twenty inches of
web pass through the press between rollers a, & a 6, during this period, and the web
is brought into proper position to be printed on the return strokes of the beds and
cylinders. In this stroke, bed A¹, pulls back 10.inches of web from roller H, aud
bed A pulls forward 10 inches of web from it, so that during this return stroke
roller H descends 10 inches. The roller G however has to rise 10 inches in order
to take up the web fed in by rolls F, and to draw back the web slacked off from
rolls H; while the roller J simply moves up and down to compensate the irregular
5 feed of web by bed A to rolls f.
Upon the completion of the return impressions and while the beds and cylinders
are reversing, the roller G descends 5 inches, roller J descends 5 inches, and

page_text: roller H remains at rest.
Thus the rollers G. J, and rolls F. f, cause twenty inches
more of web to pass through the press from roller a to a 6.
The cams shewn are approximately of the proper shape for a press fed as
described above.
The third type of machine shewn in Fig. 12 which is a side elevation,
Fig. 13 a longitudinal section, and
Figs. 14 and 15 which illustrate the cylinder throw-off and locking devices.
This press differs from the others in having a more simple continuous but variable-
speed web feeding mechanism; and also cylinder "throw-off" and locking
mechanisms.
The two connected type beds C, c are reciprocated by connecting rods D,
from crank wheels E on a shaft e, driven by pinion F on prime moving shaft f.
The cylinder carriage G is reciprocated by connecting rods H from crauk
wheels I on a shaft i, driven by wheels gearing with equal wheels E.
At opposite ends of the carriage G are vertically movable boxes g in which are
mounted eccentric bearings J for the shafts of the impression cylinders C', '; the
bearings J have depending arms ; carrying friction rollers which alternately
come in contact with stationary cam blocks K, so as to rock the bearings forward
and back at the opposite ends of the strokes of the cylinders, thereby raising and
lowering the cylinders, and throwing them "off" and "on" impression alternately,
as indicated in Figures 14 and 15.
:
Toothed dogs L, 7 pivoted on opposite sides of each bearing, alternately engage
notches Lin the periphery thereof, so as to hold the bearing in the position to
which it has been shifted, and thus lock the cylinders in their "thrown off" and
"thrown on positions.
"
The dogs L, l, are pressed toward the bearing by springs, and may be pivoted
on plates 8 secured to the boxes, so that their pivots will always remain a constant
distance from the centre of the bearings, while the boxes, bearings, dogs, etc., are
free to rise with the cylinder if any obstacle should get in its way.
The boxes are held down to give the pressure necessary for impression by
springs M interposed between the tops of the boxes and plates m which are adjust-
able by screws m¹.
The dogs L, l, have depending arms L carrying friction rollers, and the parts
are so arranged that the dog in engagement with the bearing is disengaged from it
by its roller meeting the cam K just before the roller of the arm ; meets it.
Figure 14 shows the cylinder c' at the end of its inward stroke just "thrown off
impression" and ready to begin its outward stroke. Figure 15 shows the cylinder c¹
at the end of its outward stroke just "thrown on impression" and ready to begin
its inward printing stroke.
The inking rollers N take ink from stationary fountains N¹.
The web w is led from the roll W between the feed rolls O, thence forward under
a roller 0, thence up between the ink fountains over a roller o¹, then over a roller g¹
down under cylinder c', over a roller g 4, under a roller o 2, over a register adjusting
roller o 3, back over roller g 2 then down under cylinder c', up over a roller g 3,
under a roller o 4, and thence to the delivery rolls O¹. The rollers g*, g¹, g 2, g 3
are mounted on the carriage G, the others are mounted on the frame.
In this form of press the cylinders print only on the bed that is moving in the
direction of movement of the portion of the web immediately above it. If each
bed travels half the length of the printed sheet during its printing stroke, then the
delivery rolls are so driven that half the length of a sheet is pulled forward in
unison with the movement of the printing bed during each alternate printing
operation, and the margin between sheets can be readily provided for by the
delivery in the slight intervals between the alternate operations of the co-acting
beds and cylinders.
The feed mechanism may be varied. As shown, an elliptic wheel P on shaft e
gearing with a similar elliptic wheel P¹ on a stud p, and a wheel pl on shaft p
gearing with a wheel p2 ou the shaft of one of the feed rolls O; drive the feed

page_text: rolls at an irregular speed so that their peripheries m move uniformly with the
movements of the beds. The feed rolls are geared together, and motion is
transmitted from them through gearing O' to the delivery rolls O₁, so that the
delivery is uniform with the feed. The contours of the elliptic wheels P, P¹, are
suited to the stroke of the beds, and the length of sheet desired to be printed.
Dated this 24th day of September 1895.
ABEL & IMRAY,
Agents for the Applicant.
Improvements in Web Printing Machines.
J, OLIVER IMRAY, of No. 28 Southampton Buildings, in the County of
London, Fellow of the Chartered Institute of Patent Agents, do hereby
declare the nature of this invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement :-
This invention relates to the construction of web printing machines in such a
manner as to combine the advantages of the reciprocating-bed and the locomotive- .
cylinder types of web printing presses in a single machine.
The invention is applicable to single or perfecting web presses, and consists
essentially in the combination of reciprocating beds, reciprocating cylinders, and
web feeding devices, whereby a web is fed continuously between the beds and
cylinders.
The invention may be carried out in various forms which can be readily devised
when once the principles of construction and operation are disclosed; in what
follows three general forms will be described referring to the drawings accom-
panying the Provisional Specification, first a form shewn in Figs. 1 to 4 inclusive,
in which two beds move oppositely to each other, and two cylinders move oppositely
to the beds, secondly a form shewn in Figs. 5 to 11 inclusive, in which both beds
move in the same direction, and the cylinders move oppositely to the beds; thirdly
a form shewn in Figs. 12 to 15 inclusive, in which the one cylinder with its bed
operates in the one stroke, and the other in the return stroke.
A single bed and cylinder and web feeding mechanism of any of these could be
adapted to print on only one side of the web. And either of the three forms
could be readily adapted to print twice on the same side of the web for colour
printing.
I shall describe the first form of machine referring to Fig. 1 which is a side
elevation. Fig. 2, a longitudinal central section. Fig. 3, a part transverse section
on line 3-3 of Fig. 2, and Fig. 4 an elevation of cams O. Two type-beds B, B,
are mounted on ways a, a on the main frame, so as to reciprocate to and fro.
They are shewn arranged the one above the other so as to shorten the press, but
their relative position might be varied. Outside the frames are guides a', for
sliding carriages C, C, in which are mounted the impression cylinders b, b and the
systems of inking rolls I, 1. A pinion F¹ on the prime moving shaft F with
a wheel D on shaft D, and D' gears with an equal wheel E¹ on shaft E. By
cranks on D and E' and connecting rods d and e the two beds B B are caused to
reciprocate equally but oppositely.
gears
To the undersides of the beds B B are secured racks gearing with pinions g
on shafts G which are journaled in the main frame, pinions G¹, on the shafts G,
gear with pinions G on shafts G³, and the pinions G gear with racks c on the
carriages C; so that when each bed B is moved in one direction the carriage C
above it with the cylinder b, and inking rollers I is moved in the opposite
direction. The gearing may be such that the carriage has a greater travel than
the bed.

page_text: "
Ink is supplied from fountains i, i.
The web is led from the paper roll W between the feed rolls J, up over a looping
roller K, down under a stationary roller, L, forward under the lower cylinder b,
(passing over guide rollers on the cylinder carriage), forward to a stationary
roller L, up over a register-adjusting roller L', back under the upper cylinder 61
passing over guide rollers on its carriage, back over a stationary roller L', down
under a looping roller K', up to the delivery rolls M.
The feed rolls J may be driven by gears J', J', from shaft E so as to feed in
sufficient web for two impressious for each reciprocation of the beds and cylinders,
the rolls M delivering an equal amount of web in the same period these may be
driven by gearing J and m from J'.
The looping rollers K, K¹, are carried by vertically reciprocating hars k con-
nected at their lower ends by links to the free ends of levers N which are
pivotted at their rear ends on the main frame, and are caused to vibrate by cams O,
on the shaft D these cams being so formed as to give such movements to the
rollers K, K', that they vary the regular feed and delivery of the web so as to
compensate for the irregular demands of the printing mechanisms.
Assuming for simplicity of illustration, that the sheets to be printed are to be
twenty inches long, and that one quarter of a revolution of the crank wheels
suffices to move the beds the proper distance, 10 inches during the impression;
also that the cylinders move 12 inches in the opposite direction thus passing clear
over a twenty inch forme, the operation of the press of the form shewn in Figs. 1
to 4 may be thus described.
With the parts in the position shewn in Fig. 1, the first stroke of the lower bed
is outward, and that of the upper bed is inward, as indicated by the dotted arrows,
and the looping rollers K, K', are midway of their travels.
During the first strokes of the beds therefore a perfected impression is made on
the web, 10 inches of which are pulled forward with and by the beds at a slightly
irregular feed, this irregularity being compensated for by the rollers K, K', moved
by the cam O, while the rollers n traverse the first quarter 1 of the cam O.
Meanwhile 10 inches of web are fed in by the rolls J and out by the rolls M.
After the completion of the first, and before the beginning of the second impression,
the feed and delivery rolls J and M feed in and draw through the press 10 inches
of web, and the looping rollers K, K' are lowered 5 inches, causing 10 inches more
of web to pass through the press from roller L to roller L, the roller n in this
period traversing the second quarter 2 of the cam O, and the parts then reaching
the positions shewn in Fig. 2.
During the return strokes of the beds or second impression, 10 inches of web are
pulled back between rollers L' and L, as demanded by the beds, and at the same
time 10 inches are fed in by rolls J and fed out by rolls M, therefore rollers K, K',
are raised 10 inches during this return stroke, roller K¹ giving up enough web from
its loop to supply the back feed of the beds, and the demands of the delivery rolls;
and roller K raises and takes up the 10 inches fed in by the rolls J and also the
10 inches of web fed back by the beds; during this back stroke. therefore the
roller n traverses the third quarter 3 of cam O.
In the interval between the end of the back impression, and the beginning of
the next forward impression, the rolls J feed in 10 inches of web and the rolls M
deliver 10 inches, the rollers K, K³, descend five inches, so that twenty inches of
web pass through the press between rollers L and L 3, while the roller n is traversing
the fourth quarter 4 of the cam O.
The second form of press according to this invention is shewn in Fig. 5 which is
a longitudinal section.
Fig. 6 a part transverse section through one side, and Figs. 7, 8, 9, 10 and 11
which shew details of the web looping or compensating devices.
The type beds A, A' are connected together and move as one, the cylinders B, B',
are journaled in a single carriage C.
The double bed is reciprocated by connecting rods d from cranks on wheels D,

page_text: and the cylinder carriage is reciprocated simultaneously with, but contrary to, the
beds by connecting rods e from cranks on wheels E. The wheels D, E, or their
shafts are geared together.
The inking rollers I, receive ink from fountains I 1.
The web is led from roll W through feed rolls F up over a looping roller G on:
vertically reciprocating bars g down under a guide roll a, forward under bed A to
a guide roller a' up between the beds over a guide roller a', then over a guide.
roller i, down under cylinder B', up over a roller 6, thence to and over a roller a³,.
back and under a roller a' up over a looping roller H, on vertically reciprocating
bars h, down under a roller a', over a roller 62, under cylinder B, over a roller b³,.
back to a roller a', down under a looping roller J, on reciprocating bars j and up-
to the delivery rolls f.
The roller a is preferably made adjustable for registering.
The rollers b, b, 2, and 3, are mounted on and reciprocate with the
carriage C.
The vertically reciprocating bars g are connected by link 9' with levers,
pivotted at K, and having friction rollers * bearing on cams G₁ on shaft K.
The bars carrying the roller J, are like-wise connected by links ¹ with levers j
having friction rollers, bearing on cams J' on shaft K'.
The cams G, J', (Fig. 9) are substantially identical in shape, but set on the
shaft a half turn or 180 degrees apart.
The bars are connected by links to the ends of levers 2 fulcrumed at h³, and.
having on their rear ends rollers h bearing on cams H¹, (Fig. 10) on shaft K.
Springs g, and h prevent the levers from jumping on the cans.
Shaft K¹ is geared to the shaft D' of crank wheel D so as to revolve
synchronously therewith, and the feed and delivery rolls F and fare driven by
gearing from the shaft of either crank wheel.
The second form of machine operates as follows:
Assuming each sheet to be twenty inches long, the rolls F, f should feed in and'
out forty inches of web for each complete reciprocation of the beds, that is to say,.
enough for two sheets.
•
During the forward stroke to the right of the beds, the bed A', requires.
10 inches of web to move with it towards roller a³, and these ten inches are fed iu
by rolls F, but as the movement of the bed A' is irregular as compared with that
of the rolls F the looping roller G worked by the first quarter of cam G¹ compensates.
for the varying drag of bed A', which during this stroke feeds 10 inches of web to
roller H..
At the same time bed A requires 10 inches of web to be fed back with it, and
rolls demand 10 inches for delivery, these are supplied by the looping roller J
which is raised 10 inches by its cam at such speed as to supply the demands of
rolls and bed A.
Bed A therefore during this stroke also feeds 10 inches of web to roller H,.
making a total of twenty inches to be taken up by H as determined by cam H.
When the impressions on the forward stroke are completed and while the beds
and cylinders are reversing, the roller G descends 5 inches, roller H remains at
rest, and roller J descends 5 inches, therefore the loopers shift 10 inches of web in
addition to the 10 inches fed in and out by the rolls F, f, so that twenty inches of
web pass through the press between rollers a and a, during this period, and the
web is brought into proper position to be printed on the return strokes of the beds.
and cylinders.
In this stroke, bed A pulls back 10 inches of web from roller H, and bed A
pulls forward 10 inches of web from it, so that during this return stroke, roller H
descends 10 inches. The roller G, however has to rise 10 inches in order to take up.
the web fed in by rolls F, and to draw back the web slacked off from rolls H; while
5 the roller J simply moves up and down to compensate the irregular feed of web by
bed A to rolls. Upon the completion of the return impressions and while 'the-

page_text: 5 inches, and roller H remains at rest.
Thus the rollers G, J, and rolls F, f, cause twenty inches more of web to pass
through the press from roller a to a 6.
The cams shewn are approximately of the proper shape for a press fed as
described above..
The third type of machine is shewn in Fig. 12 which is a side elevation,
Fig. 13 a longitudinal section, and
Figs. 14 and 15 which illustrate the cylinder throw-off and locking devices.
This press differs from the others in having a more simple continuous but
variable speed web feeding mechanism; and also cylinder "throw off" and locking
mechanisms.
The two connected type beds C, c are reciprocated by connecting rods D, from
crank wheels E on a shaft e, driven by pinion F on prime moving shaft f.
The cylinder carriage G is reciprocated by connecting rods H from crank
wheels I on a shaft i, driven by wheels gearing with equal wheels E.
از
At opposite ends of the carriage G are vertically moveable boxes g in which are
mounted eccentric bearings J for the shafts of the impression cylinders C¹¹; the
bearings J have depending arms j carrying friction rollers which alternately
come in contact with stationary cam blocks K, so as to rock the bearings forward
and back at the opposite ends of the strokes of the cylinders, thereby raising and
lowering the cylinders, and throwing them "off" and ". on" impression alternately,
as indicated in Figures 14 and 15.
Toothed dogs L, pivotted on opposite sides of each bearing, alternately engage
notches in the periphery thereof, so as to hold the bearing in the position to
which it has been shifted, and thus lock the cylinders in their "thrown off" and
"thrown on positions.
""
The dogs Lare pressed toward the bearing by springs, and may be pivotted
on plates 8 secured to the boxes, so that their pivots will always remain a
constant distance from the centre of the bearings, while the boxes, bearings,
dogs &c., are free to rise with the cylinder if any obstacle should get in
its way.
The boxes are held down to give the pressure necessary for impression by
springs M interposed between the tops of the boxes and plates m which are
adjustable by screws m².
The dogs L have depending arms L carrying friction rollers, and the parts
are so arranged that the dog in engagement with the bearing is disengaged from it
by its roller meeting the cam K just before the roller of the arm meets it.
Figure 14 shews the cylinder c' at the end of its inward stroke just "thrown off
impression" and ready to begin its outward stroke. Fig. 15 shews the cylinder c¹
at the end of its outward stroke just "thrown on impression" and ready to begin
its inward printing stroke.
The inking rollers N take ink from stationary fountains N¹.
The web w is led from the roll W between the feed rolls O, thence forward
under a roller 0, thence up between the ink fountains over a roller o¹, then over a
roller g down under cylinder c', over a roller g 4, under a roller o 2, over a register
adjusting roller o 3, back over roller g2, then down under cylinder c¹, up over
a roller g 3 under a roller o 4, and thence to the delivery rolls O The
rollers g, g', g', g' are mounted on the carriage G; the others are mounted on
the frame.
2
.
:
In this form of press the cylinders print only on the bed that is moving in the
direction of movement of the portion of the web immediately above it. If each
bed travels half the length of the printed sheet during its printing stroke, then the
delivery rolls are so driven that half the length of a sheet is pulled forward in
unison with the movement of the printing bed during each alternate printing
operation, and the margin between sheets can be readily provided for by the

page_text: delivery in the slight intervals between the alternate operations of the co-acting
beds and cylinders.
The feed mechanism may be varied. As shewn, an elliptic wheel P on shaft e
gearing with a similar elliptic wheel Pen a stud p, and a wheel p' on shaft p.
gearing with a wheel p' on the shaft of one of the feed rolls O drive the feed rolls
at an irregular speed so that their peripheries m move uniformly with the movements.
of the beds.
The feed rolls are geared together, and motion is transmitted from them through
gearing C' to the delivery rolls O', so that the delivery is uniform with the feed.
The contours of the elliptic wheels P P¹ are suited to the stroke of the beds, and
the length of sheet desired to be printed.
Machines of the several forms above described may be adapted for printing on
one side without perfecting by dispensing with one cylinder and its bed and adjuncts-
as may readily be understood.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, I declare that what I
claim is:-
1. A web printing machine constructed and operating substantially as described
with reference to Figs. 1 to 4 inclusive of the drawings.
2. The modified machine, substantially as described with reference to Figs. 5 to 11'
inclusive.
3. The modified machine substantially as described with reference to Figs. 12 to 15-
inclusive.
4. The adaptation of machines such as are referred to in the preceding claims for
printing on one side only, substantially as described.
5. In combination with the reciprocating beds and cylinders and the uniformly
revolving feed and delivery rolls of web printing machines such as are referred to.
in Claims 1 and 2, guide and web looping rollers and cams for moving them so as.
to compensate for the irregular movements of the beds and cylinders effected by
cranks, substantially as described.
6. In combination with the reciprocating beds and cylinders of a web printing
machine of the kind referred to in Claim 3, feed and delivery rollers driven by
elliptic gear so as to compensate for the irregular movements of the beds and.
cylinders, substantially as described.
LYOK
YOK
Bad day of J
ABEL & IMRAY,
Agents for the Applicant..
ABEL & IMRAY,
Agents for the Applicant..