Automatic Apparatus for Accurately Feeding Sheets of Paper to a Printing Machine, Folding Machine, or the like.
Year: 1898

page_text: Date of Application, 7th Feb., 1898-Accepted, 23rd Apr., 1898
COMPLETE SPECIFICATION.
Automatic Apparatus for Accurately Feeding Sheets of Paper to a
Printing Machine, Folding Machine, or the like.
I, ABEL BUG, of 239, Friedrichstrasse, Berlin, Germany, Engineer, do hereby
declare the nature of this invention and in what manner the same is to be performed
to be particularly described and ascertained in and by the following statement:-
-
This invention refers to an apparatus for automatically feeding and placing exactly,
sheets of paper one by one from a pile or column of sheets to a printing machine
paper folding machine or the like. The apparatus belongs to that class in which the
sheets are taken off by a gripper one by one from the pile then carried along by the
gripper, then dropped upon a squaring table and finally pulled straight thereon
before the grippers of the printing cylinder, the folding blades or the like act on the
sheet thus delivered and squared.
The apparatus heretofore proposed have not been suitable and have therefore not
come into use. This was because the sheet on its way from the pile to the machine
was not brought to the squaring table near enough to drop evenly upon it and
because the sheet was not pulled square enough by the means heretofore proposed,
and thus the machine to be fed therewith could not work regularly.
These defects are remedied by the apparatus forming the subject of this invention
which is illustrated by the accompanying drawings and shows it as an example
applied to a book printing press.
Fig. 1 is a diagram which illustrates the mode of action of the new apparatus.
Fig. 2 is a side elevation of the apparatus, and Fig. 3 a plan, the parts at the
right hand side being omitted.
Figs. 4, 5, 6, 7, 8, 9 and 10 shew details to be explained further on.
Fig. 11 is a plan of the squaring table with the devices for placing the sheet
dropped, on to it in a square position, Fig. 12 is a side elevation and Fig. 13 a plan of
the underside.
Figs. 14, 15, 16, 17 and 18 show details which will be explained further on.
In Fig. the pile of sheets is indicated by 1 which rests on the horizontal table 2,
and 3 is an adjoining sloping squaring table." The uppermost sheet is shown pushed
a little forward, it is taken hold of by grippers 5 which do not as heretofore go down
vertically but move downwards in the direction of the upper dotted curve and thereby
bring the sheet quite close to the slanting squaring table 3 to the set off 6 on the
printing cylinder 7, whereupon the grippers are opened and drop the sheet upon the
squaring table 3. The sheet is then pulled straight as will be described presently
before the grippers 8 of the printing cylinder 7 take it and carry it along. As the
height of the paper pile decreases the curve in which the grippers 5 move becomes
flatter so that it at last assumes the form of the lowest dotted curve.
I shall now describe the construction and action of the parts shown in the other
figures.
In Fig. 2 below is the horizontal main shaft 9 which is turned in one direction and
the other from a roll of the inking device not shown. The shaft 9 carries a worm 10,
indicated by a dotted rectangle gearing with a worm wheel 11 on the short

page_text: cross-shaft 12. This shaft carries a fixed cam 13 and a movable double armed lever 14.
Upon the cam 13 rests the roller 15 in the end of a vertical rod 16 which moves in
guides 17 on the frame 18. When the cam 13 turns in the direction of the arrow it.
lifts the rod 16, and the pawl 19, which works in an eye in the rod 16 and is influenced
⚫ by a spring 21, will with its right angled crank end 22 glide upwards on the slope 23
of a fixed arm 24 on the frame 18. As the crank end 22 leaves the slope 23 the
pawl 19 will by its spring be brought into gear with the teeth of a vertical rod 25.
This rod also works up and down and will be carried along by the rod 16 as it rises
further. But the rod 25 has also an upper row of teeth 26 which gears with the tooth
wheel 27 on the shaft. 28 that goes across under the table and at the other end
carries a tooth wheel like 27 which gears with teeth in a rod 25 working at the other
side of the table 2. The two rods 25 are at the top united by a rod 29 which in the
centre has a fixed pendent arm 30 carrying a foot or presser plate 31. This foot rests
on the pile 1 as long as the rods 25 are in the position shown in Fig. 1.
The cam 13 lifts the rods 16, 25, 25, 29 and the foot 31, until the roller 15 on the
rod 16 has come to the nose 32 of the cam. Then the upper arm of the lever 14 will
be drawn under the suitably wide roller 15 till the lower arm of the lever 14 comes
against the stop 34. The rod 16 can therefore not fall down, when the nose 32 of the
cam 13 in the return of the latter has left the roller 15. During this time the top
sheet of the pile 1 is pushed forward under the presser plate 31, grasped by grippers
and carried to the set off 6 or the printing cylinder. As soon as the sheet has left
the table 2 the nose 32 of the cam 13 comes against a peg 35 on the lower arm of
the lever 14 and moves its upper arm away from the roller 15, whereupon the rods 16,
25, 25, 29 and the foot 32 drop. The rod 16 drops till its roller 15 rests upon the
cam 13. The pawl 19 is then drawn back by the slope 23.
The now liberated rod 25 falls therefor still further, until the foot 31 comes to rest
on the paper pile 1. The rods 25, 25, 29 and the foot 31 will. consequently fall
further and further down as the height of the paper pile 1 decreases, and the pawl 19
of the rod 16 will always for every few sheets taken off and during its stroke engage
with a higher tooth of the rod 25.
The uppermost sheet pushed forward under the foot 31 will now be carried to the
set off on the printing cylinder as follows:-
•
The left end of the main shaft 9 has a bevel wheel 36 which by gearing with a
bevel wheel 37 turns an upright screw spindle 38, and a bevel wheel 39 on the upper
end of the latter gearing with a bevel wheel 40 turns the cross spindle 41 which is
carried along to the other side under the table 2. Into the bevel wheel 40 gears also
'a bevel wheel 42 on the upper end of a screw spindle 43 that runs down slanting over
the main shaft 9 and works in bearings on the frame 18. A similar spindle 43
parallel therewith' on the other side receives motion from similar bevel
wheels 40 and 42. On each spindle 43 there is a nut 44 which with its lower
straight face comes against a fixed rail under and parallel therewith. Hence
the nuts will only be pushed straight along when the spindle 43 turns. There
is over each spindle a guide rod 46 the front end of which can turn round a pivot 47
on the frame, and the back end of which has a downwardly bent arm 48.
means of this arm the guide rods are swung up and down on their pivots as shall
be described further on. On each guide rod there is a sliding sleeve 49 and
these sleeves are united and carry the gripper 5. Each rod is by a laterally arranged
' rod 50 which slides in a sleeve 51 on the nut 44 connected to this nut for the
purpose of transmitting the motion of the nut to the sliding sleeve 49 while the
guide rod 46 turns on its pivot 47.
7
By
The turning of the guide rods 46 and of the sleeve 49 and grippers carried
by them is as follows:-
The vertical screw spindle 38 while rotating pushes along a nut 52 which carries a
pawl 53 see also Fig. 4. This pawl is guided by two stems 54 in the nut 52 and by
two rollers 55 running on vertical guide rails 56, which are sloped off at the top, so
that the pawl when the rollers 55 come upon the slopes are by a spring 57.pushed
into gear
with teeth on a vertical rod 58, which at the top is provided with a guide
.i

page_text: block 59, Fig. 2, that works on a vertical guide 60. In the further rise of the
nut 52 this rod 58 is carried up also and comes against the rear arm 48 of the
gripper guide rod 46. This arm passes out between two rollers 61 on a slide 62 that
works in a second guide on the guide 60. The slide 62 has teeth 63 into which
gears the pinion 64 on a spindle 65 that at the other end has a similar pinion 64 and
thereby works a similar slide 62 which acts upon the arın 48 of the other gripper
guide rod 46.
While the spindles 43 move their nuts 44 and the sliding sleeves 49 upwards, the
gripper guide rods 46 are moved up so far that the grippers 5 at the close of the
stroke can take hold of the top sheet of the pile 1. The grippers take the sheet and
go down with it, as the main shaft 9 and also the spindles 43 turn in the opposite
direction. In this descent the nut 52 also goes down on the vertical spindle 38, and
the rod 58 follows it, as well as the arins 48 and guide rods 46 by their own weight.
As soon as the rods 46 have got into the position shown in Fig. 2 the arm 48 comes
upon a projection 66 of the guide 60 while the rod 58 descends yet further. The
rollers 55 of the pawls 53 now again come upon the slopes of the rails 56 and are
pushed laterally to the right, so that the pawl 53 comes out of the teeth of the
rod 58 and releases the latter; it drops until its lower arm, 67 drops upon the
arm 68 on the rod 25. The position vertically of the rod 58 therefore changes with
that of the rod 25 and that of the latter again with the height of the sheet pile 1.
The rod 58 hence comes further and further away from the rear arm 48 of the
gripper guide rod 46 so that the pawl 53 of the nut 52 during its stroke successively
shoots into other teeth of the rod 58. In this way the back end of the rod 46 is
raised less and less so that the curve that the gripper describes becomes gradually
flatter.
.
When the rods 25 with their cross connection 29 and the foot 31 are raised, the
uppermost sheet of the pile 1 is pushed forward under the said foot. This is done
as follows:-
The cross spindle 41 which works the gripper spindles 43 carries a worm 69
Figs. 3 and 3 which actuates the worm wheel 70 on the horizontal spindal 71' that
runs along one side of the table 2 Fig. 3. The motion of the spindle 71 is by means
of bevel wheels 72, 73, Figs. 2, 5, and 6 is transmitted to the vertical spindle 74
behind and partly by the side of which are a fixed guide rod 75 and a fixed tooth
rack 76 on a plate 77. This plate forms one leg of an angle piece 78 Fig. 2 which
can be slided upon the table 2 according to the size of the sheet. The rear side of
the pile abuts against the horizontal leg of the angle piece. To keep the bevel
wheel 72 of the spindle 71 Fig. 5 in gear with the bevel wheel 73 of the vertical
spindle 74, when the angle piece 78 with plate 77 is moved, the bevel wheel 72 is
mounted on a sleeve 79 that fits on the spindle 71 with feather and groove; the
sleeve rests in an arm not shewn which forms one piece with the bearing 74* for the
vertical spindle 74, which has a longitudinal groove.
The sleeve 115 shewn in dotted lines can slide along on the spindle 74 and has a
feather working in the groove in the spindle 74 and therefore turns with it. The
sleeve 115 has its bearing and can turn in a sleeve 80 which is fixed to the sleeve 81
that slides on the rod 75. The tooth rack 82 projects down from the sleeve 81 and
is guided in a channel shaped arm 83 on the plate 77%; it reaches below the
spindle 71. The pawl 84 is pivotted in the fork 85 which is on the sleeve 79 that
carries the bevel wheel 72. In the position shewn in Fig. 6 the lower nose 86 on the
pawl rests on a projection 87 of the guide rod 83 for the tooth rack 82. When the
spindle 71 turns in the direction of the arrow in Fig. 6 the nose 86 of
the pawl 84 will be lifted off the projection 87 and the pawl will be pushed into the
tooth rack 82 by a spring not shewn, so that this rack in the further turning of the
spindle 71 will be raised and therewith also the sleeves 80 and 81. For the latter
carries in the middle and a little to the rear (see Fig. 5 at 88) one end of a horizontal
spindle 89 that goes across the back of the table 2 and the other end of which has
its bearing in a similar sleeve 81 on the other side of the table and which can slide
upon a rod like 75. The spindle 89 has two spur wheels 90 one of which gears with

page_text: the tooth rack 76 and the other in a similar tooth rack on the other side of the
table. As the sleeves 80, 81 are raised by means of the pawl 84 the wheels 90 roll
down on the tooth racks 76, and thereby the sleeve 81 on the other side of the table
is also raised.
The two spindles 91 and 92 Fig. 6 have their bearings in the two sleeves 81 over
and under the spindle 89. The lower one is moved by the bevel wheels 93 and 94,
the latter being fast on its sleeve 115 of the sleeve 80. As the spindle 74 turns the
sleeve 115 and, through the bevel wheels 93, 94, also the horizontal spindle 91 will
also turn, irrespective of their up and down motion with the sleeve 81. The bevel
wheel 93 is coupled to the spindle 91 by a clutch 95, 96, Fig. 6, which serves to turn
the spindle 91 and the mechanisms moved thereby but not till the sleeves 80 and 81
have gone down a little way. Near each end of the spindles 89 and 91 Figs. 7 and 8
a bracket 97 is mounted, and these two brackets are adjusted, according to the width
of the pile of sheets 1 as shewn in Fig. 7. Each bracket has a socket 98 through
which passes the lower spindle 91 with feather and groove; so that the socket 98 turns
with the spindle 91. At one end of the socket 98 is fixed a cam 99 which acts upon
a roller 100 on a pawl lever 101 that has its fulcrum on the bracket 97. When the
spindle 91 turns in the direction of the arrow on Fig. 8 the cam 99 lifts the pawl 101:
This latter takes into the rack 102 which is jointed to a foot 103 that rests upon the
upper sheet of the pile. The foot is on a rod 104 which can slide up and down in
eyes or lugs 105 on the bracket 97 the spring 106 tending to pull it down, one end
being fixed to the rod 104 and the other to the lower lug 105 of the bracket 97..
While the foot 103 ascends a tooth sector 107 on the other end of the sleeve 98 turns
the tooth sector 108% of a lever 108 the fulcrum pin 109 of which is fixed to an arm
of the bracket 97.. The lever 108 has at its free end a roller 110 coated with sticky
matter and resting on the upper sheet of the paper pile 1 as shewn in Figures 7 &
8. When the lever 108 is swung forward its sticky roller 110 lifts the rear end of the
topmost sheet. This also takes place with a sticky roller at the other side of the
pile.
In the forward swinging motion of the levers 108 the rollers 110 cannot turn on
their axes as they are hindered by a lateral pawl 110%.
1.
:
As soon as the sheet at each side has been lifted away from the feet 103, the pawl 102
comes against a stop 111 on: the bracket 97 and is pushed forward so that it is freed
froin the lever 101. Then the foot drops upon the pile and holds it in place while
the uppermost sheet lifted at the rear is conveyed along as follows.
' :
The spindle 92 above the middle spindle 89 carries at the end shewn in
Figures 5 and 6 a curved arm 112 with a roller 113 which by a spring not shewn is
pressed against the cone cam 114 which is fixed on the sleeve 115 that carries' the
bevel wheel 94 and will therefore turn with the spindle 74 and slide along with
the sleeves 80 and 81..
. '
.
1
The spindle 92 is partially turned by the cone cam 114. Two levers 116 on the
spindle 92 Figures 2, 3 and 8 partake of this motion and each is by an adjustable
rod 117 connected to a slide 118 Fig. 8A gliding on a rod 119 and both rods are
connected to adjustable levers 120 which depend from the cross rod 29 that carries
the foot 31 Fig. 2. The front end of each slide 118 has a fork 121 that grasps a
beam 122 which in downwardly slanting arms carries two adjustable rollers 123 that
rest on the uppermost sheet of paper. The beam 122 has so much downward play in
the forks 121 that it is not at first carried along when the cross rod 29 rises but has its
rollers still resting on the uppermost sheet. At this time the foot 31 Fig. 2 being
raised a little, the slide 118 and the beam 122 with its rollers 123 are pushed
forward, so that the front edge of the sheet is pushed forward. The forks 121 then
lift the beam 122 in the further ascent of the cross rod 29 while the grippers take hold
of and carry down the sheet that was pushed forward. As soon as the gripped sheet
has left the pile 1 all the rollers acting on the pile have returned to their initial
position.
I shall now describe the arrangement of the grippers and the mode in which they
are worked, see Figs. 9 and 10. .
1
1*
11-
1'1

page_text: The sliding sleeves 49 of the two gripper rods 46 are connected by a transverse,
angle rail 124 having bearings for two horizontal spindles 125 and 126 Fig. 10
towards the sides of the upper table 2. These spindles are provided with the.
grippers 5 and their upper gripping surfaces are connected with the upper spindle 126
and their lower gripping faces with the lower spindle 125. Upon each gripper.
spindle acts a helical spring 129 Fig. 9 in such manner that the spindles are thereby
turred oppositely and the grippers held closed. To open the grippers, each gripper
spindle is turned by hand against the stress of the springs, until a nose 128 on the
upper spindle 126 takes against the back of a pawl 129 on the angle rail 124 and a
nose 130 on the lower spindle 125 takes against the back of a pawl 131 on the
inner side of the sliding sleeve 49 (shewn dotted in Fig. 10). The sleeves 49,
moved by nuts 44 on the spindles 43 ascend. with the thus opened grippers.
When
the grippers are near the upper table 2 the lowergripper surface is first released,"
because the pawl 131, that holds it and has its fulcrum at, 132, see Fig. 10, comes,
with a roller 133 under a slope 134 and is depressed by it. The lower gripping
surface then assumes the position shewn in the middle of Fig. 10. When the
grippers are near the end of their upstroke, and the sheet 4, pushed forward, has got
between them (Fig. 10 above); then the roller 135 on the pawl 129 of the upper
gripper spindle 126 runs upon the face 136 connected to the cross rod 29, see also
Fig. 10, so that the pawl is raised off the nose 128 of the upper gripper spindle 126
and this spindle is then released. The upper gripper surfaces then spring against the
lower and firmly nip the front edge of fhe sheet. previously arrived between them.
Now the grippers descend with the-sheet in order to take it to the printing cylinder,
the grippers descending with their guide rods as before explained with reference to
Figs. 1 and 2. The air space between the gripped sheet and the table gets thereby
so sinall, that the sheet, as soon as it is released from the grippers quietly drives off*
the thin layer of air below it and I thus prevent, bellying out, rumpling and curling
up heretofore taking place by reason of the large wedge shaped air space that to be
driven out by the sheet pulled off the pile.
3:
The release of the sheet takes place when the grippers are near the end of their
down stroke for then an arm 137 comes against an adjustable stop 138 on the
gripper guiding rod 46. The lower gripper spindle 45 will thereby be turned so
far against its spring that the nose 130 on the spindle 125 again catches behind the
pawl 131.
"By this rotation of the lower gripper spindle its sector shaped inner arın 139 which
acts against the pin 140 of a crank 141 the upper gripper spindle 126 carries the
upper spindle along with it until its nose 128 comes behind the pawl 129. The sheet
thus released now drops upon the table 3 (see Figs. 11-18). This table is provided
with the device which serves to accurately adjust the dropped sheet and is as follows.
Across the tablé 3 runs a spindle 142 which at its left end in Fig. 11. carries a
pinion 143. Into this pinion gears a tooth rack 144 which forms one piece with the
rod 145 shown in Figs. 3 and 34. This rod is jointed to the lever 146, which has a
bevel segment 147 that gears with the bevel wheel 148 on the spindle 71 that
actuates the back sheet lifting device. On the other end of the table spindle 142,
Fig. 11, there is a disk 149 which on each side carries a wing 150 jointed thereto.
The free end of each wing is under the influence of a helical spring 151 Fig. 14, on a
guiding bolt 152 fixed to the disk 149, and tends to press the wing against a pin on
the bolt. When the spindle 142; turns in the direction of the arrow Fig., 12 then
the outer wing 150 Fig. 14 presses against a little roller 153 on a rod 154 under the
spindle 142 and pushes this rod in. This rod is connected with one arm of a double
arined lever 155 Figs. 11 and 13 and a similar rod 156 is connected to the other arm.
By this arrangement when the rod 154'is pushed in, the rod 156 will also be drawn
in. Each rod carries a sleeve 157 Figs. 13 and 17 forming one pièce with
sleeve 158 loose on the spindle 142. Each sleeve 158 carries above a grading
plate 159 Figs. 11 and 17 between which the sheet that has to be adjusted arrives in
the following manner.
The inner ends of the two rods 154,and 156 are by means of two links 160

page_text: Fig. 13 connected to a rod 161 which can slide transversely under the middle of the
table 3 and which by the inward motion of the rods 154 and 156 are pushed down-
wards and by the outward motion of those rods is pushed upwards. Upon the
rod 161 near its upper end is a sleeve 162 loose thereon and having arms 163 which
are connected to two small blocks 164 which are guided in slots in the table.
Upon the blocks and on the top of the table (Fig. 11) is fixed a strip of wood 165
and upon this is glued a cardboard tablet 166 upon which the sheet drops from
the grippers.
When the rods 154 and 156 go inwards and the rod 161 is moved downwards then a
stop collar 167 on this rod presses upon a helical spring 168 between it and the sleeve
162 with a slight tension to carry along with it the sleeve 162 and the parts connected
therewith. The cardboard tablet 166 will therefore also be moved downwards and
carries the sheet thereon with it until its front edge comes against the marks on the
printing cylinder. The sheet is only held upon the tablet by friction and can there-
fore move freely to all sides so that it must adjust itself exactly to the marks on the
printing cylinder when the table moves it forward.
The sleeve 162 united to the tablet 166 goes forward until its lower stop 169 Fig. 12
comes against a set screw 170 which is screwed into a lower eye in the bearing 171.
By adjusting this screw the amount of forward motion of the tablet and the
sheet can be adjusted as required. In the outstroke of the rods 154 and 156 and
the upstroke of the rod 161 a second stop collar 172 on the ladder carries the sleeve
162 and the tablet back into the initial position.
In the inward stroke of the rods 154 and 156 and the downstroke of the rod 161 the
marker plates 159 which are united to the rods 154 and 156 by the double sleeves 157
and 158 also go inwards and so far that the distance between the markers 173 Figs. 16
The sheet
and 17 on the plates 159 becomes a little less than the width of the sheet.
will therefore be bent a little up or bellied out and its side edges he pushed closely
against the markers 173. The bending is so slight that if the side edges of the sheet
are not exactly at right angles with its front edge as is usually the case only one point
on one and one point on the other side edge comes in contact with the adjoining
marker whereby the front edge of the sheet is obliged to lie close against the markers
on the printing cylinder. Then a peg 174 drops on the inner side of each marker 174
and nips the side edge in question of the sheet. Thereupon a slope 175 on the outer
side of the wing disk 149 Figs. 11, 12 and 14 acts against the little roller 153 on the
rod 154 and causes both the rods 154 and 156 to move a little to the outward and
accordingly shift the marker plates 159 a little apart and thus stretch the nipped
sheet even. As the wing disc 149 is turned further the marker plates 159 remain
stationary while the nipping pegs 174 rise again and free the sheet which then by the
opposite rotation of the table spindle 142 is taken hold of by the grippers of the print-
ing cylinder and pulled away. By this opposite turn of the spindle 142 the inner wing
150 of the disk 149 presses against a second little roller 176 on the rod 154 Fig. 14 and
pushes it and the rod 156 upwards so that the marker plates 159 are moved apart to
be ready for receiving the next sheet between them. The nipping pegs must be raised
and lowered at the right moment. This is done as follows. Each peg 174 Figs. 15, 16
and 17 is adjustably fixed on a one armed lever 177 having its fulcrum at 178 in an
eye of the marker plate 159 and has a lateral roller 179 Fig. 18 which works against a
cain 180 that partakes of the rotation of the table spindle 142 and the sliding of the
marker plates 159.
When the cam 180 comes into the position shown in Fig. 16, the small roller 179
rests on the largest diameter of the cam, and the lever 177 with its nipping peg 174,
is raised. The peg is guided in a shell shaped collar 181 on the marker 173. This
collar has its raised part downwards and serves to guide the side edges of the sheet
properly under the raised nipping pegs. Upon the free end of the lever 177 a
spring 182 to the left on Fig. 16 acts to press the lever and its peg downwards, when
The sheet
the smaller diameter of the cam 180 comes under the little roller 179.
will then be held by the two pegs 174. The pressure of the springs 182 acting upon
the levers 177 is so adjusted that one peg presses harder on the sheet than the other
5

page_text: When the marker plates 159 after the inward stroke have again gone a little apart,
the sheet will first be stretched by the nipping. pegs and then carried along only by
that marker plate whose nipping peg presses hardest on the sheet; hereby the centre
line of the sheet is made to agree exactly with the centre line of the printing
cylinder. At the time that the other side of the same sheet has to be printed on, the
other nipping peg will be pressed harder, and the first less hard, so that the same
edge of the sheet is firmly pressed and thereby agreement of the said centre lines
attained again, so that the type block or body and lines of the printing agree on
both sides.
In order that each nipping screw remains up as long as necessary a lateral crank
pin 183 on the cam 180 Fig. 18 pushes a bolt 184 at the right moment under the
raised roller 179. When the table spindle 142 turns in the other direction this bolt
is pushed back by the crank pin 183 so that the roller 179 can follow the contour of
the cam.
By the side of each lever 177 Figs. 15, 16 and 17 there is another lever 185 which
has its fulcrum at 186 in an eye on the marker plate 159 and rests with a small
roller. 187 on the circumference of another cam 188 that also turns with the table
spindle 142 and slides along with the marker plate 159. The two cams 188 and 180
are in one and a fork 189 connected to the marker plate 159 goes between the cams.
Each of the two levers 185 carries at the free end a plate 190, which in the position
shown in Fig. 16 by the action of the spring 191 upon the lever 185 presses on the
sheet at that moment when it cannot any longer carry the sheet along with it. The
sheet will then be suddenly stopped and lie on the table. Thereupon the lever 185
with its plates 190 rises again and releases the sheet which now by the cardboard
tablet 166 is pushed squarely up to the markers in the printing cylinder, as already
described before the grippers of the printing cylinder take it and carry it along.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
.
1
1. A self acting sheet deliverer or feeder for printing, paper folding and similar
machines characterized thereby, that the uppermost sheet of a pile, after it has been
pushed forward under a rising rod 29 or the like and been caught by grippers 5, or
the like on its way to the printing cylinder folding blade or the like is by the guiding
of the grippers in a downwardly going curved path or by a lowering of the rear end
of the gripper guide brought as near as possible to the table 3 for the purpose of
preventing the turning over, bellying, rumpling, and onesided dropping of the sheet
as it is released from the grippers, substantially as set forth.
2. An arrangement according to Claim 1, whereby the gripper guide 46 hinged in
front is raised at the rear by a rod 58 moved from the main shaft 9 and lowered by
the weight of the guide or by an auxiliary load, and in both cases to an extent which
is reduced as the height of the pile of sheets is reduced, in that after the gripper
guide has descended and rests upon a fixed projection 66, the said rod 58 descends
further until it is unçoupled from the pawl 53 on the nut 52, said pawl serving to
raise the rod, and held up by an arm 68 connected to a rod 29, for the purpose of
raising the grippers each time only so far as is necessary for the regular catching of
the each time uppermost sheet of the pile, and always lowering it so far that the
caught sheet is brought near to the face of the table 3 substantially as set forth.
3. An arrangement according to Claims 1 and 2 whereby the raised rod 29, while
the caught sheet descends with the gripper guide is by a stop or lever 14 kept from
dropping until the pulled off sheet is clear of the pile, substantially as set forth.
4. An arrangement according to Claim 1 whereby the pushing forward of the each
time uppermost sheet of the pile is effected in such manner that the back end of this
sheet is first lifted by sticky rollers 110 and the fore end pushed forward by other
rollers 123, the pile of sheets being held in place by presser feet 103 which during
the lifting are raised but drop upon the pile again before the forward pushing of

page_text: the uppermost sheet the back end of which has been lifted has begun substantially as
set forth.
5. An arrangement according to Claim 1 whereby at the close of the upstroke of the
grippers first the lower gripper faces spring up when a pawl 131 is released and then
the upper gripper faces spring down when a pawl 129 is released for the purpose of
ensuring a regular nipping of the sheet pushed forward substantially as set forth.
6. An arrangement according to Claim 1 and in combination with a selfacting sheet
adjuster, characterized thereby that each sheet dropped upon the table 3 comes to
lie free on a tablet 166 that can slide on the table and carries the sheet up to the
markers on the printing cylinder, the folding knives or the like and admits of, its
adjusting itself accurately against the markers, whereupon the sheet first is bellied
out a little by means of two laterally moved markers 173 provided with nippers and
then nipped and lastly moved to the middle of the printing cylinder, folding blade or
the like so that it assumes the right position after the nippers have been released.
substantially as set forth,
8. An arrangement according to Claims 1 and 7, whereby the nipper markers 173
are so adjusted that the sheet is released from one marker but pressed on by the
other marker in order first to stretch the sheet when the two markers move apart and
then to bring it in the right position to the type, the folding blade or the like
substantially as set forth..
9. The construction of self-acting sheet deliverer or feeder described with reference
to the drawings.
$