Improvements in Printing and Folding Machinery.
Year: 1892

page_text: COMPLETE DIDUIFICATION
[Communicated from abroad by Messieurs R. HOE AND COMPANY, of 504, Grand
'Street, in the City of New York, United States of America, Printing Machine
Manufacturers.]
Improvements in Printing and Folding Machinery.
I PHILIP ARTHUR NEWTON, of the Office for Patents, 6 Bream's Buildings,
Chancery Lane in the County of London, Patent Agent, 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:-
The first part of this invention relates to the sheet-retaining devices employed
in printing and other arts, to seize the leading end of a sheet or web, and hold it in
position upon a cylinder while the sheet or web is fed forward thereby.
One form of such sheet-retaining devices now in use, is that of oscillating
gripping fingers, or, as they are commonly known, "grippers," which are alter-
nately rocked inward against the outer surface of the cylinder, to seize and hold a
sheet as it is fed within the range of their movement, and outward from the
oylinder, to release the sheet, those grippers being commonly operated by means
of cams or equivalent devices properly timed for the special gripper movement
desired, and one object of the present invention is to improve the construction of
this class of sheet-retaining devices.
The second part of this invention relates to folding mechanism of that class in
which a transverse fold is imparted to the sheet by a folding blade mounted in one
rotating carrier that operates to force the line of fold into the nip of jawe, or
Bimilar devices, mounted in a companion carrier, to which the sheet is thus trans-
ferred; and another object of this part of the present invention is to provide an
improved construction by which the sheet shall be folded with greater certainty,
and especially to provide a construction by which the folded sheet is gripped
against the outer surface or periphery of the carrier, so that the folded edge of the
sheet lies flat upon the cylinder, and the bend of the paper just inside the fold line
produced by the mechanism previously in use.
The invention may be applied in various ways and the constructions embodying
the same will vary with the character of the work which the grippers are intended
to perform, and with the number of folds which are desired from the folding
apparatus.
S
In order to illustrate fully the principle of the invention, therefore, there is
shown in the accompanying drawings the preferred forms of construction
embodying the invention, as applied in the three operations of sheet transferring,
delivering, and sheet folding, the last operation being shown in an apparatus for
forming two transverse folds, and from a description of these constructions and
their operation, the constructions required for other applications of the invention
will be apparent to those skilled in the art.
Referring to the accompanying drawings:-
Fig. 1 is a sectional diagram showing my invention as applied to sheet-trans-
ferring in a printing mechanism.
Fig. 2 is a plan of the first gripper cylinder.
Fig. 3 is a longitudinal section on the line 3-3 of Figs. 4 and 5, showing one
and of the gripper cylinder on an enlarged scale.
Fig. 4 is a section on the line 4-4 of Fig. 3, looking to the right, when the
position of the cylinders correspond.
Fig. 5 is a section on the line 5-5 of Fig. 3, looking to the left.
Figs. 6, 7, and 8 are detail sections showing the two gripper cylinders in three
different positions during the transfer of a sheet.

page_text: J
Figs. 9, 10, and 11 show modifications of the gripper cylinders.
Fig. 12 is an end view of the folding mechanism.
Fig. 13 is a plan view of the same.
יו
Fig. 14 is a longitudinal section of the receiving carrier on the line 14 of
Fig. 16.
Figs. 15, 16, 17, and 18 are cross sections of the folding apparatus, showing the
different positions during the operation of folding.
Fig. 19 is a similar section of the receiving carrier, showing a modification.
Figs. 20 and 21 are details hereinafter referred to.
In Fig. 1, A, B,. are the first and second type cylinders, and CD the corre
sponding impression cylinders, of an ordinary printing mechanism, the type
cylinders being provided with the usual iuking mechanism E. The sheets S from
the web roll F are partially severed by the perforators G, and fed onward by
tapes H to the breaking rolls I, by which they are fully severed, and thence to
the first impression cylinder C, where they receive the first impression, and by
which they are transferred to the second impression cylinder D, where they receive
their second or perfecting impression, and from which they are delivered to the
tapes K over switch I..
It will be understood that this particular arrangement forms no part of the
invention, but is only one of the common forms of mechanism employing
cylinders for transferring sheets, and shown, as well adapted to illustrate the
invention.
re
Referring now to the parts embodying the invention, the first gripper cylinder C
is provided with a series of openings 10, arranged longitudinally of the cylinder
through which the grippers a operate, these openings 10 being of sufficient length
for the play of the grippera. The cylinder is provided also with a second series of
openings 11 (Fig. 2), through which the grippers on the co-operating second
gripper cylinder Dienter cylinder C, for receiving the sheet. These openings are
shown as continuations of openings 10, and this construction is preferable on account
of cheapness of manufacture, and because in certain cases it is desirable that all
grippers should act at certain points of the printed sheet, but it will be understood
that the construction is equally efficient with the grippers of the second cylinder
entering the first cylinder at other points longitudinally of the cylinder.
necessary that the grippers of the second cylinder D should seize the sheet from
within the cylinder C, and grip it against the surface of cylinder D on the same
line as grippers a, the openings 11 extend slightly behind the openings 10, as shown
clearly in Fig. 2, and are of sufficient length for the play of the grippers of
cylinder D within the cylinder.
As it is
The grippers a, as shown, consist of short fingers, acting to grip the sheet against
the outer surface of the cylinder, and having stems entering the cylinder, and
pivotally mounted at their inner ends on a rock shaft 12, extending longitudinally
through the cylinder, and forming a rocking support for the grippers. The grippers
"may be pivotally mounted on the rock shaft in any suitable manner. As shown,
the grippers are. loosely mounted on pivot pins 1, carried by blocks 2, having
stems 4 rivetted or otherwise secured to the shaft in recesses 3, which are formed
by cutting away shaft 12 on one side, this construction being.compact, while giving
free movement for the inner ends of the gripper stems transversely to the shaft.
The rock shaft 12 is pivotted in the two heads of the cylinder, and is preferably
supported between the heads, as by supports 5, formed by screws tapped into the
cylinder, as shown, or in any other suitable manner.
For the purpose of controlling the movement of the grippers a during the rocking
of shaft 12, it is necessary to provide guides between which the stems of the
grippers move longitudinally, and to secure the proper action of the grippers it is
desirable that the guides should be as close together as is consistent with free
movement of the grippers. To prevent the binding of the grippers in the guides,
therefore, there are preferably employed narrow guides which rock with the rock
shaft 12 and grippers a. These guides may be constructed and actuated in any

page_text: suitable manner, but, in order to secure the proper relative movement of the guides
and grippers, it is preferable to form the guides by slots in a second rock shaft
mounted in the cylinder outside the rock shaft 12, and to connect the two rock
shafts so as to actuate one from the other.
The particular form of connections used between the shafts and the actuating
means, may be varied widely, but there is shown a simple construction which has
been found efficient. The shaft 12 is provided at the end just inside the cylinder,
with a segmental gear o, formed preferably by teeth cut in the circumference of
the shaft, as shown, although this gear may be provided in any other suitable
manner, and this gear is engaged by a segmental gear 7 oscillated by shaft 14
mounted in the heads of the cylinder outside the shaft 12, the segmental gear
being preferably carried by arm 13, adjustably secured upon the shaft 14 by a set
screw 8, or in any other suitable manner. Outside the cylinder, the shaft 14 carries
a crank arm 15, preferably adjustably secured thereto by means of a set screw 8,
this crank arm being provided with a bowl 16, which runs in a fixed cam 17, secured
to the frame of the machine, as shewn in Fig. 3, or mounted in any other suitable
manner. The form of this cam 17 will be modified in accordance with the work
which the gripper is to perform. As shown, the cam is of such form as to close the
grippers a on the receipt of the sheet from the tapes H, and hold it during the first
impression, and until the sheet is carried into position to be delivered to the grippers
on cylinder D, when the cam operates to open the grippers and release the sheet.
The guides for the grippers are formed by slots 9, through which the stems of the
grippers pass, these guides being preferably guiding edges, which are formed by
bevelling the slots inwardly from opposite sides of the shaft, so that the gripper is
engaged only on a single line on each side, and the gripper is free to oscillate on
the pivot thus formed, while being positively guided and controlled thereby as it
slides through the shaft. It will be understood that the crank arm and bowl may
be carried by either rock shaft, but it is preferable to actuate the inner shaft from
the outer, as shown.
The cylinder D is provided also with grippers boperated by means of a cam 18,
Fig. 6. As the construction of these grippers and their supporting and operating
parts is identical with that just described in connection with cylinder C, the same
reference letters may be used for corresponding parts in the two cylinders, and no
detailed description need be given thereof in connection with cylinder D. The
cylinder D also has openings 10, 11, corresponding to those of cylinder C, and as'
the grippers a enter the cylinder D behind the line on which the grippers b
engage the sheet, as shown in Figs. 6 and 7, the openings 11 are extended
behind the openings 10, as in cylinder C, and as shown in Fig. 20 on an enlarged
scale.
The cam 18 is of the same general construction as the cam 17 by which the
grippers a of the cylinder C are operated, but its detailed' form is varied, and the
timing of the parts changed, so that the grippers a release the sheet, and
the grippers simultaneously or immediately thereafter seize the leading end of
the sheet, and hold it during the second impression, and are then operated to
release the sheet at switch L, over which the sheet passes to the delivery tapes K."
The sheet may be taken from the cylinder D, by pins or grippers, on the release
of the grippers b, as is common with other grippers, but it is preferable to provide
the cylinder D with means for throwing the end of the sheet off the cylinder as it
reaches the switch, so that the sheet may be delivered by a switch and tapes, or
other feeding mechanism, as shown, without the use of receiving pins or grippers.
For this purpose, the following means are used, shown in Figs. 6, 7 and 8, and' in
detail in Figs. 20 and 21. The cylinder D is recessed beneath each of the gripper'
fingers, and in the recesses are mounted small spring cushions, which form a part
of the surface engaged by the grippers. The spring cushions may be formed in'
any suitable manner, so as to normally project slightly from the surface of the
cylinder, and may consist simply of elastic blocks set in the cylinder, or flat springs,
mounted therein. In the preferred construction shewn, the cushions X are carried
4
34 C

page_text: by stems y, Fig. 21, sliding through the shell of the cylinder, and pressed by
coiled springs, as shown, being held against the tension of the springs by nuts on
the stems, pressing against the inner surface of the shell, this construction enabling
the cushions to be adjusted, as desired, to secure their proper action.
The spring cushions not only perform the function of throwing off the leading
end of the sheet for delivery, but co-operate with the grippers in the operation
of taking a sheet by transfer from another cylinder or otherwise, as the sheet is
gripped by the cushions and grippers, early in the gripping movement of the
grippers, and thus held in position until the grippers engage the surface of the
cylinder.
This operation of the grippers in transferring a sheet, will be understood from
Figures 6, 7 and 8, which shew the gripper cylinders and grippers in three
positions. In Fig. 6, the sheet S is just being advanced by the cylinder C into
position to be transferred to cylinder D, the cam 17 is just about to operate the
grippers a to release the sheet, and the grippers b are open, and in their central
position within the cylinder, and just about to be closed by cam 18. In Fig. 7, the
grippers a have been opened by cam 17, and are just about to be withdrawn within
the cylinder, and the grippers b are just being closed by the cam 18, to grip the
sheet S to the cylinder D. As the cylinder is advanced from the position shewn
in Figure 7, the sheet is carried forward by cylinder D, and the grippers a are
withdrawn within the cylinder C, out of the line of movement of the sheet, this
position of the parts being shewn clearly in Fig. 8.
While the transfer will be
accomplished by the grippers ab, as just described, and the construction is complete
and operative practically without the cushions, it will be seen from Fig. 7, that the
cushions aid in securing the correct taking of the sheets by grippers b, by depressing
the sheet into the opening 10 in cylinder C, and co-acting with grippers & to grasp
the sheet before the grippers reach the surface of the cylinders.
b
The operation of delivering the sheet from cylinder D over the switch L, to
tapes K, will be understood from Fig. 21, the operation of the grippers at this
point being substantially the same as that of the grippers a in transferring the
sheet to cylinder D, as just described, the grippers opening as they reach the
switch L, and permitting the sheet to be thrown off the cylinder by the spring
cushions, so that its leading end passes over the point of the switch, and to the
delivery tapes.
It will be seen that the invention provides a very positive and efficient gripper
construction, and reduces largely the movement of the grippers, and the space
required therefor, without reducing their capacity. By the peculiar construction
of the grippers and their operating devices, a quick movement of the grippors is
secured with an easy cam, and as the gripping and release of the whole surface of
the sheet engaged by the gripper is simultaneous, the actual gripping and release of
the sheet may be instantaneous. It is thus possible to make a gripper, the move-
ment of which is much quicker than those heretofore in use, and by which the
transfer of sheets from one cylinder to another is greatly facilitated, and all danger
of injury to the sheet avoided. The spring cushions ensure correct action in taking
a sheet, especially in the operation of transferring, and form a very simple delivery
device. It will be understood that the use of these cushions is not limited to
combination with the improved grippers, but that they are of general application in
gripper constructions.
The grippers have been described only in connection with means by which they
are operated at cach revolution of the cylinders. It will be understood, however,
that the constructions common in connection with grippers of other forms, may be
used with these grippers, so as to cause them to operate only at certain revolution
of the cylinders.
Moreover, any of the
operation may be used.
in Figures 1 to 8, have
secured to the frame, it
common constructions for throwing the grippers out of
Thus, while the cams 17, 18, in the constructions shewn
been described as fixed, and they may be permanently
is preferable to use the construction shewn in Fig. 3,-the

page_text: cain 17 being carried by a sleeve 23, mounted loosely upon the shaft of the cylinder,
and adapted to be secured thereto by a bolt 24, this bolt being loosened, and the
cam secured to the frame, by bolts 25, when the grippers are to be operated. In
throwing the grippers out of operation, the cam will be moved upon the shaft until
the grippers are withdrawn within the cylinder, as shewn in Fig. 4, and then secured
in position upon the shaft, the grippers thus being held withdrawn, and inoperative,
during the rotation of the cylinder.
While the grippers have been shown as operated positively in both directions by
a closed cam, it will be understood that other means may be used for actuating the
grippers, and that the constructions common with grippers of other forms are
applicable also to the improved grippers. Thus, there is shown, in Fig. 9, a
common construction in which the shaft 14, carrying the cam-operated bowl 16,
is provided with a second crank arm 26 on the opposite side of the shaft from the
bowl 16, and pivotally connected to a spring-pressed rod 27, sliding in supports
in the cylinder, the gripper thus being opened by the cam and closed by spring
pressure.
While it is preferable to mount the rocking support by which the grippers are
carried inside the guides, as the movement of the grippers transversely to the
cylinder may thus be reduced largely below the in and out movement, and a large
capacity with very small transverse movement be thus secured, it is evident that the
support may be located outside the guides, and many of the advantages of the
preferred construction be obtained.
In Figs. 10 and 11, I have shown transverse and longitudinal sections of a
construction in which the stems of grippers a are provided with openings by which
they are mounted loosely on a crank rod 28 carried by short shafts 29, mounted in the
heads of the gripper cylinder, preferably as near the circumference as possible, to
reduce the transverse movement. The inner ends of the grippers pass through slots
in a rod mounted loosely in the heads of the cylinder inside the crank rod, the rod 30
thus forming guides for the grippers by which they are controlled, friction being
avoided by the free rocking of the rod with the stems.
It will be seen that the rod is a rock shaft corresponding to the shaft 14. The
grippers may be operated from a cam by a crank and bowl carried by a short shaft 29,
but it will be found inuch preferable to use the construction shown, in which the
shafts 29 are provided with gears 31, engaged by segmental gears 32 carried by a
shaft 33 mounted in the heads of the cylinder, and carrying on one end the crank
arm and bowl 34, by which it is actuated from the cam groove 35. The proper
movement of the grippers is thus secured with a small cam movement.
The operation of this construction is substantially the same as previously
described, in connection with the preferred' construction, and will be understood
without further description.
Referring now to Figures 12 to 19, the folding apparatus shewn therein, as
a simple and convenient embodiment of that part of the invention relating to folding
mechanism, will now be described.
It will be seen that the general constraction of the means for mounting and
actuating the folding blade, and the grippers receiving the sheet from the same, are.
substantially the same as already described, and no further detailed description of
such construction is necessary.
In the figures referred to, M is the carrier on which the sheet to be folded is
carried, N the receiving carrier onto which the sheet is folded from the carrier M,
and O a pair of folding rolls between which the sheet is folded from the carrier N,
The sheet on the carrier M is gripped at its leading eud by the grippers 36,
which may be like those before described, or of any common construction, and
operated in any suitable manner. As shown, these grippers consist of the ordinary
gripping fingers carried by a shaft, which is provided with a crank arm 37, carrying
a bowl actuated by a stationary 38 mounted on the frame of the machine, us usual
in such constructions. The sheet, when folded onto the carrier N, may be delivered
therefrom unfolded or folded, as preferred, and the means for folding the sheet

page_text: from the carrier may be of any suitable construction, and operated in any suitable
manner.
In this construction, the shaft 39 carrying the double edged folding blade c (sec
Figs. 15 to 19) is mounted in the opposite ends of the carrier N, and provided
outside one of the heads of the carrier with a cross arm 40, Figs. 12 and 13, which
has heart shaped ends, and inside said ends carries bowls which run upon the
interior surface of an annular cam 41, so that the blade is held in the position
shewn in Fig. 15 during a large part of the revolution of the cylinder. In proper
position for the protrusion of the blade, so as to guide the rear end of the sheet
between the rolls O, the annular cam 41 is curved outward, and this outward curve,
co-operates with an interior cam 42, to guide the blade outward from the carrier by'
engagement with the bowls on the cross arm, so that the blade is first protruded
from the carrier as the leading bowl passes outward, under the control of the
cams 41, 42, and is then reversed and withdrawn as the bowl passes onward, on the
opposite side of the point of cam 42. The positive movement of the blade at
the point of its greatest protrusion, which is just as the blade passes the point of
the cam 42, is insured by engagement of one of the heart-shaped ends of the cross
arm with two stationary cams 43, mounted in the frame outside the carrier, and
preferably formed by projections from the inner face of the cam 41. With this
construction, a sheet is folded from the carrier N between the rolls at each
rotation of the carrier.
Referring now to the construction of the parts by which the sheet is folded from
carrier M to carrier N, and in which this part of the invention is embodied, the
carriers M N are provided respectively with slots 44, 45, extending longitudinally
of the carrier, through which the folding blade d of carrier M, and the gripper e of
carrier N operate, these slots 44, 45 being of sufficient width for the play of the
blade and gripper.
The blade and gripper e are mounted in the same manner, and the operating
mechanism therefor is the same with the exception of the cams by which the parts
are actuated, so that the same reference letters may be used for corresponding parts
in the two constructions, and a single.description will apply to both.
The blade d consists preferably of a single plate, extending substantially the full
length of the sheet to be folded, as shewn, although it will be understood that a
series of plates forming a blade may be used, if desired. This blade differs from
the ordinary folding blade, in that its edge is hent so as to project in the line of
movement of the carrier, this edge operating to tuck the fold line under the
gripper e, so as to ensure its being grasped by the latter.
The gripper e of carrier N preferably formed, as shown, in the same manner
as the blade d, consisting of a single plate extending the full or substantially the
full length of the carrier, so that the sheet is gripped over the whole fold line. Its
will be understood, however, that a series of plates may be used instead of a single
plate, or that the gripper may be formed of a series of fingers, as usual in gripper
constructions, although not with so good results.
This gripper e may be mounted and actuated in any suitable manner, and by any
suitable mechanism, to cause it to co-act with blade d, and the periphery of 4
carrier N to seize tho sheet on the fold line, but it is preferable to employ the same
construction in both carriers, and the invention consists, in part, in the combination
of two rotating carriers thus equipped. In the preferred construction, then, both
the blade and gripper e are carried by stems 46 entering the carriers, and
mounted and actuated by the same means as the grippers a b of the construction 5
shown in Figs. 1 to 8, and previously described, and the same references will be
used for corresponding parts, and the previous description of these parts will also
apply to the construction now being considered.
The gripper e, therefore, as stated above, is shown as mounted and actuated by.
exactly the same mechanism as the blade d, but the stationary cam 47 by which 5
the shaft 12 of carrier N is actuated, for the operation of the gripper, differs in
form from. cam 48, by which the blade d of carrier M is actuated.

page_text: As shown in the drawings; the cam 48 is so constructed as to give the blade d'an
outward movement, and quick return, for the purpose of forcing the sheet into the
grasp of grippers e, and the cam 47 is so constructed as to close the gripper upon
the sheet as it is received from' the blade d, and hold it closed, to carry the sheet
forward into position to be folded by the blade e between the folding rolls O,,and.
then to open the gripper, to release the sheet, and allow it to be folded from the
carrier.
The operation of the folding mechanism will be understood readily from a brief
description in connection with Figs. 15 to 18, which show the paths in different.
positions during the folding and delivery of a sheet. In Figure 15, the carriers are
shown in position with the blade d and gripper e approaching the folding point, and
both withdrawn within the carriers, the sheet S to be folded being carried by the
carrier M, with its leading edge gripped by the grippers 36.
As the carriers advance from the position shown in Figure 15, the shafts 12 in:
the respective carriers are actuated by the cams 47, 48, acting upon the bowl's 16,
through the connections previously described, so as to rock the shafts and carry the
blade d and gripper e outward from the carrier, and as the blade d and gripper are
carried forward by their respective carriers, the fold line of the sheet is tucked' by
blade d under and within.the grasp of the gripper e, so as to insure its being seized
by the gripper when the latter is closed, the gripper 36 being opened to release the
head of the slicet, so that it may be transferred from carrier M to carrier N. This
position is shown in Figure 16.
The blade d is now actuated by the cam 48, so, as to release the sheet and be-
withdrawn within the carrier, and the gripper e is simultaneously actuated by the
cam 47,, so as to close and grip the folded edge of the sheet against the periphery
of carrier N, the sheet thus being advanced with the carrier N on its continued.
rotation. The parts are shown in Fig. 17 with the folded sheet advanced from the
folding point, and with the gripper e approaching the point of release for the
delivery of the sheet from the carrier.
The sheet may be delivered from the gripper e without folding, in any
suitable
manner, but the construction shown is adapted to give two folds to the sheet, and us
the carrier N advances from the position shown in Fig. 17, and the gripper e'is
opened by the cam 47 to release the leading end of the sheet, the folding blade c is
simultaneously operated by the mechanism previously described, to impart a second
transverse fold to the sheet, and deliver it between the folding rolls O, by which it
is delivered in the usual manner, as shown in Fig. 18, this operation being repeated
on the next rotation of the carrier, a sheet having meanwhile been taken by the
grippers 36 on carrier M. It will readily be understood that if another transverse
fold is to be imparted to the sheet, the carrier N may be provided with a folding
blade similar to the blade d, in place of the common blade c, and operate to fold
the sheet onto another carrier similar to N, from which the sheet may be again:
folded to folding rolls, or to another carrier similar to carrier N.
The folding blade d and grippere have been described only in connection with
means by which they are operated at each revolution of the carriers. It will be
understood, however, that the constructions common in connection with folding
blades and grippers of other forms, may be used with the improved blade and
grippers, so as to cause them to operate only at certain rovolutions of the carriers,.
and any of the common constructions for throwing the folding blade or gripper out.
of operation, may be used when this is desired.
While the blade and gripper have been shown as operated positively in both
directions by closed cams, it will be understood that other means may be used for
actuating thein, such as a cam and spring, as shown in Fig. 19, and that the
constructions of shaft-rocking devices common with folding blades, and grippers of
other forms, are applicable also. in my improved construction, and that other
modifications described above in connection with the grippers, are applicable also
when these are used for folding.
It is evident, also, that many other modifications in the constructions shown,.

page_text: I
may be made without departing from the invention, and it is not intended to limit
the claims to the exact form of any of the devices shown,
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, as communicated
to me from abroad, I declare that what I claim is :-
1. The combination with a cylinder and its grippers, of a movable support
carried by said cylinder, on which the grippers are pivotally mounted, and means
for simultaneously rocking said grippers and moving the support to carry the axes
of the grippers to and from the surface of the cylinder, substantially as described.
2. The combination with a cylinder and its grippers, of a rocking support carried
by said cylinders, on which the grippers are pivotally mounted, and means for
controlling said grippers, substantially as described.
3. The combination with the cylinder and its grippers, of a rocking support
carried by said cylinder, on which the grippers are pivotally mounted, and guides
between which said grippers move, substantially as described.
4. The combination with, a cylinder and its grippers, of a rocking support carried
by said cylinder, on which the grippers are pivotally mounted, and rocking guides
between which said grippers move, substantially as described.
5. The combination of a cylinder, a rock shaft mounted therein parallel with
the axis of the cylinder, grippers carried by said rock shaft and pivotally mounted
thereon, with their axes parallel with the axis of the shaft, and guides between
which said grippers move, substantially as described.
6. The combination of a cylinder, a rock shaft mounted therein parallel with the
axis of the cylinder, grippers carried by said rock shaft and pivotally mounted
thereon, with their axes parallel with the axis of the shaft, and rocking guides
between which said grippers move,, substantially as described.
7. The combination of a cylinder, a rock shaft mounted therein, grippers carried
by said rock shaft and pivotally mounted thereon, with their axes parallel with the
axis of the shaft, and a rook shaft mounted in said cylinder parallel with the first
mentioned shaft, and provided with slots through which the grippers pass, and in
which they are guided, substantially as described.
+
8. The combination of a cylinder, a rock shaft mounted therein, grippers carried
by said rock shaft and pivotally mounted thereon, with their axes parallel with the
axis of the shaft, and a rock shaft mounted in said cylinder parallel with and outside
the first mentioned rock shaft, and provided with slots through which the grippers
pass, and in which they are guided, substantially as described.
9. The combination of a cylinder, a rock shaft mounted therein, grippers carried
by said rock shaft and pivotally mounted thereon, with their axes parallel with the
axis of the shaft, and a rock shaft mounted in said cylinder parallel with and outside
the first mentioned rock shaft, and provided with slots through which the grippers
pass, said slots being bevelled inwardly from opposite sides of the shaft, to form
narrow guides for the grippers, substantially as described.
10. The combination of a cylinder, a rock shaft mounted therein, grippers carried
by said rock shaft and pivotally mounted thereon, with their axes parallel with the
axis of the shaft, a rock shaft mounted, in said cylinder parallel with and outside
the first mentioned rock shaft, and provided with slots through which the grippers
pass, and in which the grippers are guided, driving connections between said shafts,
and means for actuating one of said shafts during the rotation of the cylinder,
substantially as described.
11. The combination of a cylinder, a rock shaft mounted therein, grippers carried
by said rock shaft and pivotally mounted thereon, with their axes parallel with the
axis of the shaft, a rock shaft mounted in said cylinder parallel with and outside
the first mentioned rock shaft, and provided with slots through which the grippers
pass, means for actuating the outer shaft during the rotation of the cylinder, and
connections between said shaft and the inner shaft, for rocking the latter simul
_taneously, substantially as described.

page_text: 12. The combination with a cylinder having openings 10, of rock shaft 12 in
said cylinder, grippers having stems pivotally mounted on said shaft, rock
shaft 14 outside said shaft 12, and provided with slots through which the gripper
stems pass, and means for rocking said shafts simultaneously, substantially as
described.
13. The combination with a cylinder having openings 10; of rock shaft 12 in
Baid cylinder, grippers having stems pivotally mounted in said shaft 12, rock
shaft 14 outside shaft 12, and provided with slots through which the gripper
stems pass, arm 13 and segmental gears 6, 7, connecting said shafts, and means
for rocking one of said shafts substantially as described.
14. The combination with a cylinder having openings 10, of rock shaft 12 in
said cylinder, grippers having stems pivotally mounted on said shaft, rock
shaft 14 outside said shaft 12, and provided with slots through which the gripper
stems pass, arm 13 and segmental gears 6, 7 connecting said shafts, a crank arm
and bowl on one of said shafts, and a can engaging said bowl for rocking said
shafts, substantially as described.
15. The combination of two cylinders and their grippers, rocking supports on.
which the grippers are pivotally mounted, means for controlling the grippers, and
means for rocking said supports, to operate one set of grippers to release, and
the other set to take the sheet, whereby the sheet is transferred from one cylinder
to the other, substantially as described.
16. The combination with cylinders C, D, each provided with openings 10, 11,
the openings 11 extending behind openings 10, of grippers ab carried by Baid
cylinders, rocking supports in said cylinders on which the grippers are pivotally
mounted, guides between which said grippers move, and meaus for rocking said
supports to operate one set of grippers to release, and the other set to take the
sheet, whereby the sheet is transferred from one cylinder to the other, substantially
as described.
17. The combination with the cylinders C, D, each provided with openings 10, 11,
the openings 11 extending behind openings 10, of grippers a, b, carried by said
cylinders, rocking supports in said cylinders on which the grippers are pivotally
mounted, rocking guides between which said grippers move, and means for rocking
said supports to operate one set of grippers to release, and the other set to take
the sheet, whereby the sheet is transferred from one cylinder to the other,
substantially as described.
18. The combination with a cylinder and its grippers, of spring cushions on the
cylinder normally projecting outside the surface of the cylinder, and forming a
part of the cylinder co-acting with the grippers to seize and hold the sheets,
substantially as described.
19. The combination with a rotating carrier provided with a gripper co-acting
with the periphery of the carrier to seize a sheet, of a rotating carrier provided
with devices for seizing a sheet; and a folding blade, and means for actuating said
blade to tuck the fold line of a sheet carried by the blade carrier between said
gripper and the periphery of the gripper carrier, and withdrawing said blade
during the rotation of the carrier, substantially as described.
20. The combination with a rotating carrier provided with a gripper co-acting
with the periphery of the carrier to seize the sheet, of a folding blade, a rotating
carrier for said blade, and means for actuating said blade, to tuck the fold line
of a sheet between said gripper and the periphery of the gripper carrier, and
withdrawing said blade during the rotation of the carrier, substantially as
described.
21. The combination with a rotating carrier provided with a gripper co-acting
with the periphery of the carrier to seize a sheet, of a rotating carrier provided
with a folding blade, a movable support carried by said carrier, on which the blade
is pivotally mounted, and means for simultaneously rocking said blade and moving
the support to and from the surface of the carrier, whereby the blade is operated
B

page_text: to tuck the fold line of a sheet between said' gripper and' the periphery of the
gripper carrier, substantially as described.
[J
22. The combination with a rotating carrier provided with a gripper co-acting
with the periphery of the carrier to seize a sheet, of a rotating carrier provided
with a folding blade, movable supports carried by the carriers on which the
gripper and blade are pivotally mounted, and means for simultaneously rocking
said gripper and blade, and moving the supports to carry the axes of the gripper
and blade to and from the surface of the carriers, whereby the blade is operated
to tuck the fold line of a sheet between said gripper and', the periphery of the
gripper carrier, substantially as described..
J
23. The combination with carriers M N, of folding blade d and grippere carried
by said carriers respectively, rocking supports in said carriers on which the blade
and gripper are pivotally mounted by stems 46, guides between which said stems
move, and means for rocking said supports to operate; the blade and gripper, to
fold the sheet from carrier Mito carrier N, substantially as described.
24. The combination with carriers M. N, of folding blade d and gripper e
carried by said carriers respectively, rocking supports' in' said carriers on which
the blade and gripper are pivotally mounted by stems 46, rocking guides between
which said stems move, and means for rocking said supports to operate the blade
and gripper, to fold the sheet, from carrier M to carrier N, substantially as
described.