Improvements in Printing Apparatus chiefly Designed for use in connection with Machines for Making Paper-bags.
Year: 1899

page_text: Improvements in Printing Apparatus chiefly Designed for use in
connection with Machines for Making Paper-bags.
I, HERMANN HÖLSCHER, of Lengerich, Westphalia, in the Empire of Germany,
Engineer, do hereby declare the nature of this invention to be as follows:-
-
The printing upon bags, cornets and the like of paper, of the names of firms
or otlier particulars has hitherto been carried out, after the completion of the
article, in a special press by special workmen and thus the cost of the printing
was comparatively high.
Now according to this invention the printing upon the paper-bags, cornets and
the like is effected during their manufacture by the aid of a rotary printing
apparatus interposed in the bag-making machine and thus not only cheaper but
quicker work is obtained.
With this improved arrangement however it may happen that the feeding of
the paper-bags into the rotary printing-press becomes interrupted accidentally
through the tearing of the paper band or through any other cause in the working
of the machine and in such a case the ink will be transmitted to the printing
cylinder and will then smear the bags or the like afterwards supplied thereto
until the ink has been completely removed. This smearing of the bags may of
course be prevented by stopping the machine and cleaning the cylinder but this
would entail great loss of time which is especially important when such inter-
ruptions are of frequent occurence.
In order to absolutely obviate the before mentioned defects the improved
printing press is provided with an arrangement by which the printing is auto-
matically stopped directly the paper bag fails to arrive and is again automatically
started as soon as the feed takes place.
The improved printing press interposed in the paper-bag making machine
consists, for example, of a printing-cylinder, a type or plate-cylinder and suit:
able inking mechanism of known construction. These mechanisms are operated
in a well known manner and the novelty consists only in the provision of a
gripping device for the press cylinder for gripping the bags or cornets which are
being fed along in a vertical direction. In order to prevent printing when no
bags are being fed a cross-bar or bridge arranged opposite the grippers is fitted
with two spring contact pins in connection with an electric circuit.
grippers close without holding a paper-bag between them and the bridge forming
a counterbearing, one of these grippers will be brought into metallic contact
with both the said contact pins and thereby close an electric circuit which then
prevents the press-cylinder from coming into contact with the type cylinder so
that no printing can take place.
If the
The arrangement adopted for separating the two cylinders through the closing
of the circuit is as follows.
The press-cylinder is mounted in oscillating bearings and its shaft is furnished
at each end with a cam disc. Opposite these cams are disposed two circular discs

page_text: mounted also in swinging bearings, the bearings which project downwardly are
drawn towards each other by springs and so the rotation of the press-cylinder
causes all the discs to revolve. Below the projecting ends of the bearings are
keyed upon a common shaft, double locking levers adapted to retain either the
cam-discs and the press cylinder or the circular discs. When the cylinder of the
printing press rotates and according to whether the double locking lever engages
the one or the other of the projecting ends of the swinging bearings, either the
press cylinder is separated from the type cylinder, or the circular discs move back
so that in the first case printing interrupted and in the second case printing
takes place.
The operation of the double locking lever is effected by the aid of a lever-system
in connection with the oscillating armature lever of two electro magnets which acts
in the following manner. When a paper-bag is fed, between the grippers and
the contact-pins of the bridge forming the counter-bearing therefore, the electro-
magnets interposed in the electric circuit are not affected and the armature
remains at rest and by its projection retains the lever-system and causes the
double locking lever to lock the swinging bearings and keep the press-cylinder in
position for printing. If no paper-bag is fed into the printing apparatus the
grippers on coming against the contact pins close the circuit thereby causing the
electro magnets to be magnetised and attract the armature lever which thereupon
releases the lever system and enables the double locking lever to engage the
bearing of the circular disc. So soon as the projecting cam surfaces during their
further rotation are brought in contact with the circular discs the shaft and the
press cylinder are moved away from the type-cylinder and the printing ceases.
Obviously the automatic device before described may also be used in connection
with other rotary printing machines.
The continuous paper tube for forming the bags after having been cut and
folded or lapped, is fed along by feed drums to the conveyor bands which pass
over suitable rollers. These conveyor bands which are held close together by
rollers conduct the sleeve-like piece of paper as far as the rollers at the end of the
bands and is there retained by a cross bar until its front edge has been pushed
downwards between turning down rollers. The manner of actuating the said
slide and other parts will be hereinafter explained.
The folding rollers conduct the sleeve-like piece of paper, after closing the
folded bottom thereof to finish the paner-bag, to the rotary printing apparatus
interposed in the machine: such apparatus consisting mainly of a press-cylinder
the type-cylinder and,inking mechanism mounted beneath the cylinders.
The press-cylinder is located vertically below the feed or turning down rollers
and is formed with a peripheral recess for the reception of the gripper mechanism.
This mechanism consists of a rotary shaft carrying say three grippers and a
stationary cross-bar or bridge. The rotary or gripper-shaft at one end carries
a toothed pinion gearing with a toothed segment. This segment is mounted
lose upon a stud or pivot screwed in the end wall of the press. cylinder and has a
roller carried by its tail-piece which runs upon a cam disc secured to the nave
of the bearing and having a peripheral extension or cam surface:
During the rotation of the press cylinder the segment roller runs upon the
projecting edge or cam surface of the cam disc and thereby moves the grippers
towards the bridge and closes the same. When the segment roller again leaves
the cam surface and runs upon the plain portion of the cam disc, which is firmly
keyed upon the nave of the swinging bearing, the grippers are caused to return
to their initial positon by springs and this causes the segment also to be moved
back. When the grippers thus opened arrive underneath the turning down
rollers the paper bag pushed downward by a slide has been sufficiently lowered
by the said rollers to bring the edge of the paper between the open grippers and
the cross bar or bridge. At this moment the segment roller runs upon the
projecting portion or cam surface of the cam disc and closes the grippers which
latter then retain the paper bags until after it has been printed by the type

page_text: cylinder. By this time the segment roller has arrived at the end of the cam
surface and escapes from the same when the grippers again open and release the
paper bag which is conveyed away by a delivery band and is deposited upon a
delivery table.
To stop the printing if at any time and for any reason the machine fails to
deliver a paper bag between the press cylinder and the type cylinder these latter
are separated from each other. To this end the press-cylinder is mounted in swing-
ing bearings and upon the ends of the cylinder-shaft are provided at the exterior
of the machine frame press cylinder cams. In line with the cam-disc and also
mounted in a second set of swinging bearings are two circular discs. The swing-
ing bearings are drawn towards each other by springs in such a manner that
the rotation of the press-cylinder causes the rotation of the circular discs through
the intervention of the press cylinder cams, and upon the projection of said cams
coming against the circular dises they are caused to recede. When however the
second bearings are held stationary it is the press-cylinder which is forced rear-
ward and thus separated from the type cylinder. According therefore as one or
other action takes place printing proceeds or is interrupted.
To enable either the press-cylinder with the press cylinder cams or the circular
discs to be held stationary as may be required, the bearings are formed with
downwardly projecting portions adapted to be engaged by double locking levers
keyed to a common shaft and arranged below the bearings. These double locking
levers are formed with hook-shaped noses at each end which engage the project-
ing ends with the object stated, so that in fact it depends upon the position of the
double locking lever whether printing takes place or not.
I will now describe the manner and means by which the double locking lever
is operated so that printing takes place only when a paper bag is supplied, while
the printing ceases directly the feed is interrupted.
At one end of the shaft of the double locking lever there is arranged a short
upwardly directed arm pivoted to a connecting rod secured to a pivoted bell crank
lever. The horizontal arm of the bell-crank lever is furnished with a roller which
rests upon a disc secured to the end of the shaft of the press-cylinder and having
a peripheral recess, or a corresponding projection. By this contrivance the bell
crank lever is caused to swing upon its pivot and thus govern the position of the
double locking lever. When the horizontal arm of the bell crank lever is raised
the bearings of the press-cylinder together with the press cylinder cams upon its
shaft are locked firmly in position by the double locking lever while the circular
discs are free to yield at the required moment and thus allow printing to take
place.
In order to keep the bell crank lever in its raised position during the whole
time bags are being fed forward for printing, the free end of the horizontal arm
of the said lever is held by a supporting arm. This supporting arm is connected
to the horizontally arranged movable armature which is arranged above the
electro magnets and normally kept out of contact with same by a spring. On
the failure to feed a paper bag into the grippers these latter by their contact with
the contact pins on the cross bar or bridge-piece close the circuit so that the
electro magnets become excited and in attracting the armature against the tension
of the spring they cause the support or arm to move and disengage the horizontal
arm of the bell-crank lever. The arm then drops until its roller rests in the
recess of the cam disc and thereby causes the double-locking lever to 'alter its
position so as to engage the second set of bearings of the circular discs while
releasing the press-cylinder which is then forced sideways by the cam-surface of
the press cylinder cam disc coming into contact with the circular disc. In this
case as has already been stated the printing is interrupted.
The electric circuit in which are included the electro-magnets starts at the
one pole of the battery leads to the contact spring through the wire arranged in
a groove of the shaft of the press-cylinder and then to the contact pin in the
bridge-piece. From the other contact pin a second wire arranged in the groove

page_text: of the cylinder leads to the contact spring and thence to the other pole of the
battery.
The contact pins in addition to being mounted in the bridge-piece are guided
in the strap or stirrup and by their springs they are caused to slightly protrude
from the bridge piece.
If no paper bag has been fed into the printing apparatus the middle gripper
comes against both contact pins and thereby closes the circuit actuating the
electro magnet. but directly the gripper opens again the circuit is interrupted.
The circuit also remains open when a non-conducting body is placed between
the grippers and the contact pins. As paper constitutes a bad conductor the last
mentioned case must happen each time a bag is fed forward and engaged in the
grippers. Thus during the continuous uninterrupted working of the machine
the electro magnets are not actuated and the bell-crank lever remains engaged
so that the double locking levers retain the swinging bearings of the press
-cylinder and enable the printing to proceed. Directly however from any cause
the paper bag fails to be delivered between the grippers these latter come into
contact with the contact pins, and close the circuit, the electro-magnet then
becomes excited, attracts the armature, the support connected with it is moved
towards the right and the lever system reverses the double locking lever which
latter then locks the swing bearings of the circular disc. The press-cylinder is
therefore enabled at the required moment to separate from the type-cylinder and
printing ceases.
The machine is driven from the driving shaft by means of suitably arranged
toothed gearing. A longitudinal shaft driven from one of the gearing shafts
operates the knife-like beater which between the two pairs of feed rollers cuts
the bag material off the paper tube.
The slide by which the front edge of the paper-bag is inserted between the
rollers is articulated to a lever on a cross shaft. At the other end of the cross
shaft there is provided an-arm connected by a rod to the eccenrtic pin of a disc
upon the end of the said gearing shaft. The motion of the slide can be regulated
by adjusting the nuts on the screwed portion of the connecting rod.
Dated 101 Jan 1900
:
Improvements in Printing Apparatus chiefly Designed for use in
connection with Machines for Making Paper-bags.
I, HERMANN HÖLSCHER, of Langerich, Westphalia, in the Empire of 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:-
The printing upon bags, cornets and the like of paper of the names of firms
or other particulars has hitherto been carried out, after the completion of the
article, in a special press by special workmen and thus the cost of the printing
was comparatively high.
Now according to this invention the printing upon the paper-bags, cornets and
the like is effected during their manufacture by the aid of a rotary printing
apparatus interposed in the bag making machine and thus not only cheaper but
quicker work is obtained.

page_text: With this improved arrangement however it may happen that the feeding of
the paper-bags into the rotary printing press becomes interrupted accidentally
through the tearing of the paper band or through any other cause in the working
of the machine and in such a case the ink will be transmitted to the printing
cylinder and will then smear the bags or the like afterwards supplied thereto
until the ink has been completely removed. This smearing of the bags may of
course be prevented by stopping the machine and cleaning the cylinder but this
would entail great loss of time which is especially important when such inter-
ruptions are of frequent occurence.
In order to absolutely obviate the before mentioned defects the improved
printing press is provided with an arrangement by which the printing is auto-
matically stopped directly the paper bags fails to arrive and is again automatically
started as soon as the feed takes place.
The improved printing press interposed in the paper-bag making machine
consists, for example, of printing-cylinder, a type or plate-cylinder and suit-
able inking mechanism of known construction. These mechanisms are operated
in a well known manner and the novelty consists only in the provision of a
gripping device for the press cylinder for gripping the bags or cornets which are
being fed along in a vertical direction. In order to prevent printing when no
bags are being fed a cross-bar or bridge arranged opposite the grippers is fitted
with two spring contact pins in connection with an electric circuit.
grippers close without holding a paper-bag between them and the bridge forming
a counter bearing, one of these grippers will be brought into metallic contact
with both the said contact pins and thereby close an electric circuit which then
prevents the press-cylinder from coming into contact with the type cylinder so
that no printing can take place.
If the
The arrangement adopted for separating the two cylinders through the closing
of the circuit is as follows.
The press-cylinder is mounted in oscillating bearings and its shaft is furnished
at each end with a cam disc. Opposite these cams are disposed two circular discs
mounted also in swinging bearings, the bearings which project. downwardly aré
drawn towards each other by springs so that the rotation of the press-cylinder
causes all the discs to revolve. Below the projecting ends of the bearings are
keyed upon a common shaft, double locking levers adapted to retain either the
cam-discs and the press cylinder or the circular discs. When the cylinder of the
printing press rotates and according as to whether the double locking lever engages
the one or the other of the projecting ends of the swinging bearings, either the
press cylinder is separated from the type cylinder, or the circular discs move back
so that in the first case printing is interrupted and in the second case printing
take place.
The operation of the double locking lever is effected by the aid of a lever-system
in connection with the oscillating armature lever of two electro magnets which acts
in the following manner. When a paper-bag is fed between the grippers and
the contact-pins of the bridge forming the counter-bearing therefore, the electro-
magnets interposed in the electric circuit are not affected and the armature
remains at rest and by its projection retains the lever-system and causes the
double locking lever to lock the swinging bearings and keep the press-cylinder in
position for printing. If no paper-bag is fed into the printing apparatus the
grippers on coming against the contact close the circuit thereby causing the
electro magnets to be magnetised and attract the armature lever which thereupon
releases the lever system and enables the double locking lever to engage the
bearing of the circular disc. So soon as the projecting cam surfaces during their
further rotation are brought into contact with the circular discs the shaft and the
press cylinder are moved away from the type-cylinder and the printing ceases.
Obviously the automatic device before described may also be used in connection
with other rotary printing machines.

page_text: In the accompanying drawings I have shown a practical method of applying
the invention.
Figure is a side-elevation of a paper bag making machine to which this
invention has been applied.
Figure 2 is a plan view of the same.
Figure 3 is a cross-section taken upon the line 3-3 Figure 1 looking from
right to left.
Figure 4 shows a side elevation of the press-cylinder and also the type-cylinder
with the automatic stopping and starting device, the double locking lever being
engaged with the 'bearings of the press-cylinder and printing taking place.
Figure 5 is a transverse vertical section of Figure 4.
Figures 5 and 5b are detail views.
Figure 6 is a side-elevation showing the two cylinders with their swinging
bearings, the cam and disc and the double locking levers.
Figure shows a side-elevation of the lever-system in connection with the
double locking lever and the electro magnets for operating them.
Figure 8 is an end-view of the press-cylinder with its grippers and with the
feed-rollers.
Figure S is a separate view of the cam-disc for operating the grippers.
Figure 9 is a plan of Figure S.
Figure 10 shows the arrangement of the contact pins disposed upon the bridge
piece forming the counter bearing.
Figure 11 and 12 show the friction springs with the conducting wires buried
in a groove in the shaft of the grippers.
The continuous paper tube for forming the bags after having been cut and
folded or lapped is fed along by feed drums 1-1 2-2 Figures 1 and 2 to the
conveyor bands 4 which pass over suitable rollers 3-3 Figure 1. These con-
veyor bands which are held close together by rollers 5 conduct the sleeve-like
piece of paper as far as the rollers at the end of the bands and is there
retained by a cross bar S, Figure S, until its front edge has been pushed down-
wards between the rollers S by a slide 7. The manner of actuating the said
slide and other parts will be hereinafter explained.
The rollers S conduct the sleeve-like piece of paper, after first closing the folded
bottom thereof to finish the paper-bag, to the rotary printing apparatus arranged
in the machine; such apparatus consisting mainly of a press-cylinder 9 the type-
cylinder 10 and inking mechanism 11 mounted beneath the cylinders.
The press-cylinder 9 rotates in the direction indicated by the arrow Figure 1
and is located vertically below the feed or turning down rollers S, and is formed
with a peripheral recess for the reception of the gripper mechanisin see Figures S
and 9. This mechanism consists of a rotary shaft 12 carrying say three
grippers 13 and a stationary cross-bar or bridge 14 see Figure 10. The rotary
or gripper-shaft at one end carries a toothed pinion 15 gearing with a toothed
segment 16. This segment is mounted loose upon a stud or pivot 17 screwed in
the end wall of the press cylinder 9 and has a roller 18 carried by its tail-piece
which runs upon a cam disc 19 secured to the nave of the bearing 23 Figure 5
and having a peripheral extension or cam surface 20.
•
During the rotation of the press cylinder 9 the roller 18 of the segment 16
runs upon the projecting edge or cam surface 20 of the cam disc 19 and thereby
moves the grippers 13 towards the bridge 14 and closes the same. When the
roller 18 again leaves the cam surface 20 and runs upon the plain portion of
the cam disc 19, which is firmly keyed upon the nave of the swinging bearing 23
(Figures 5 and 5), the grippers are caused to return to their initial position by
springs (not shown in the drawings) and this causes the segment also to be moved
back. When the grippers thus opened arrive underneath the turning down
rollers 8 the paper bag pushed downward by the slide 7 has been sufficiently
lowered by the said rollers to bring the edge of the paper between the open

page_text: grippers and the cross-bar or bridge 14. At this moment the roller 18 of the
segment 16 runs upon the projecting portion or cam surface 20 of the cam disc 19.
and closes the grippers 13 which latter then retain the paper bag until it has
been printed on by the type cylinder 10. By this time the roller 18 has arrived
at the portion 21 and escapes from the projection 20 (Figure S), when the
grippers 13 again open and release the paper bag which is conveyed away by a
delivery band 22 Figure 1 and is deposited upon a delivery table not shown in
the drawings.
To stop the printing if at any time and for any reason the machine fails to
deliver a paper bag between the cylinders 9 and 10 these latter are separated from
cach other. To this end the press-cylinder 9 is mounted in swinging bearings 23
pivoted at 24 (Figures 1, 3, 6), and upon the ends of the cylinder-shaft are
provided outside the machine frame discs 25 (Figures 5 and 6) provided with a
projection 26. In line with the cam-disc and also mounted in a second set of
swinging bearings 28 pivoted at 27 are two circular discs 29. The swinging
bearings 23 and 28 are drawn towards each other by springs 30 in such a manner
that the rotation of the press-cylinder causes the rotation of the circular discs 29
through the intervention of the cams 25, and upon the projection 26' coming
against the circular discs they are caused to recede. When however, the bear-
ings 28 are held stationary it is the cross-cylinder which is forced rearward and
thus separate from the type cylinder 10. According therefore as one or other
action takes place printing proceeds or is interrupted.
To enable either the press-cylinder 9 with the cam 28 or the circular disc 29 to be
held stationary as may be required, the bearings 23 and 28 are formed with down-
wardly projecting portions adapted to be engaged by double locking levers 32
Figures 4 and 6 keyed to a common shaft 31 and arranged below the bearings.
These double locking levers are formed with hookshaped noses at each end which
engage the projecting ends of the swinging bearings 23 or 28 with the object
stated, so that in fact it depends upon the position of the double locking lever
whether printing takes place or not.
I will now describe the manner and means by which the double locking lever
is operated so that printing takes place only when a paper bag is supplied, while
the printing ceases directly the feed is interrupted.
At one end of the shaft 31 of the double locking lever 32 there is arranged a
short upwardly directed arm 33 (Figures 1, 3, 4, 5 and 7) pivoted to a connecting
rod 34, secured to a pivoted hell crank lever 36 pivoted at 35. The horizontal
arm of the bell-crank lever is furnished with a roller 37 which rests upon a
disc 38 Figure 1 secured to the end of the shaft of the press-cylinder 9 and having
a peripheral recess 39, or a corresponding projection see Figure 5. By this
contrivance the bell crank lever 36 is caused to swing upon its pivot 35 and thus
govern the position of the double locking lever 32: When the horizontal arm of
the bell crank lever 36 is raised the bearings 23 of the press-cylinder 9 together
with the cams 25 upon its shaft are locked firmly in position by the double lock-
ing lever 32 while the circular discs 29 are free to yield at the required moment
and thus allow printing to take place see Figure 4.
In order to keep the bell-crank lever 36 in its raised position during the whole
time that bags are being fed forward for printing, the free end of the horizontal
arm of the said lever is held by a supporting arm 40 Figures 4 and 7. This
supporting arm is connected to the horizontally arranged movable armature 41
which is arranged above the electro magnets 42 and normally kept out of contact
with same by a spring 43. On the failure to feed a paper bag into the grippers 13
these latter by their contact with the contact pins 48, 49 Figure 10 on the cross
bar or bridge piece 14 close the circuit so that the electro magnets 42 become
excited and in attracting the armature 41 against the tension of the spring 43.
they cause the support or arm 40 to move and disengage the horizontal arm of
the bell-crank lever 36. The arm then drops until its roller 37 rests in the
recess 39 of the cam disc 38 and thereby causes the double-locking lerer 32 to

page_text: alter its position so as to engage the bearings 28 of the circular discs 29 while
releasing the press-cylinder 9 which is then forced sideways by the cam-surface 26
of the disc 25 coming into contact with the circular disc 29. In this case as has
already been stated, the printing is interrupted, see Figures 6 and 7.
The electric circuit in which are included the electro magnets 42, starts at the
one pole of the battery 73 Figures 1, 2 and 3 leads to the contact spring 44
Figure 2 through the wire arranged in a groove 45 of the shaft 46 of the press-
cylinders (Figures 1, 11, 12) the wire 47 being insulated at 47* Figure 11 and
then to the contact pin 48 in the bridge-piece 14 Figure 10. From the other
contact pin 49 a-second wire also arranged in the groove 45 of the cylinder 46
leads to the contact spring 50 Figure 2 and thence to the other pole of the
battery 73 Figure 1. As will be seen from Figure 10 the contact pins 48, 49 in
addition to being mounted in the bridge-piece 14 are guided in the strap or
stirrup 52 and by their springs 51 they are caused to slightly protrude from the
bridge piece 14.
If a paper bag has not been fed into the printing apparatus the middle gripper
comes against both contact pins 48, 49 and thereby closes the circuit actuating
the electro magnet 42 but directly the gripper 43 opens again the circuit is
interrupted. The circuit also remains open when a non-conducting body is placed
between the grippers 13 and the contact pins 48, 49. As paper constitutes a bad
conductor the last mentioned case must happen each time a bag is fed forward
and engaged in the grippers 13 Thus during the continuous uninterrupted
working of the machine the electro-magnets 42 are not actuated and the bell-crank
lever 36 remains engaged so that the double locking levers 38 retain the swing-
ing bearings 23 of the press-cylinder 9 and enable the printing to proceed.
Directly however from any cause the paper bag fails to be delivered between the
grippers 13 these latter come into contact with the contact pins 48 49 and close
the circuit, the electro-magnet then becomes excited, attracts the armature 4.1,
the support 40 connected with it is moved towards the right and the lever
system 36, 34, 33, reverses the double locking lever 32 which latter then locks the
swing bearings 28 of the circular disc 29. In consequence the press-cylinder 9
is therefore enabled at the required moment to separate from the type-cylinder 10
and printing ceases.
The machine is driven from the shaft 53, the toothed wheel 54 transmits the
rotation to a larger toothed wheel 55. Upon the shaft 55* of this latter wheel
are arranged two other toothed wheels 56 and 56 Figure 1 the wheel 56 gearing
with the wheel 57 which communicates motion to the pairs of feed rollers 1
and 2. The press and type cylinders 9 and 10 are driven from the shaft 58
through the intervention of the wheels 59, 60, 61 and 62 (Figures 1 and 2). The
shaft 58 being driven by a wheel 56 and intermediary gear arranged on the
outer side of the frame. The toothed wheel 63 drives the pairs of rollers 6 and 8
and the wheel 64 drives the inking rollers through the intervention of the
wheels 65 and 66. A longitudinal shaft 75 driven from the shaft 58 through the
intervention of bevel wheels 74 operates the knife like beater 76 which between
the two pairs of feed rollers 1 and 2 cuts the bag material off the paper tube.
The slide 7 by which the front edge of the paper-bag is inserted between the
rollers 8 is articulated to a lever 68 on a cross shaft 67. At the other end of the
cross shaft 67 there is provided an arm 69 connected by a rod 70 to the eccentric
pin of a disc 71 upon the end of the shaft 58. The motion of the slide 7 can be
regulated by adjusting the nuts 72 on the screwed portion of the connecting
rod 70.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is.
1. A type printing apparatus consisting of two rotary cylinders for use in
machines for making naner-bags cornets and the like so arranged ith ita

page_text: gripper-mechanism that the paper-bags fed to the cylinder 9 may be gripped at
the required moment by the grippers, substantially as described.
2. A form of construction of the type printing apparatus claimed in Claim 1.
characterized in that the press-cylinder 9 is mounted in swinging bearings 23
while on its shaft are provided discs 25 formed with a peripheral swelling and
acting on discs 29 also mounted in swinging bearings 28 so arranged that their
depending, spring-controlled ends may be locked in position and that either the
circular discs 29 yields at the required moment when printing takes place, or that
the cylinder 9 is separated from the type cylinder and printing is prevented,
substantially as described.
fast on
3. A form of construction of the type-printing apparatus claimed in Claims 1
and 2 characterized in that either the swinging bearings of the press-cylinder 9
or those of the circular discs 29 are locked in position by double locking levers 32
a common shaft 31 and operated through the intervention of electro
magnets 42 interposed in a circuit adapted to be closed owing to the failure of a
paper bag being fed into the grippers 13 which latter then come into direct contact
with two contact pins 48, 49, mounted in a bridge-piece 14, and which are also
connected in the circuit, substantially as described.
4. A form of construction of the type printing apparatus claimed in Claims 1
to 3, characterized by the fact that the armature 41 of the electromagnets 42 is
provided with a supporting lever 40 which during the regular feeding of paper-
bags and consequent breaking of the circuit holds a lever system 33, 34, 36, in
connection with the shaft of the double locking lever 32, in such a position that
this latter locks the swinging bearings of the cylinder 9 for printing to take
place.
5. A form of construction of the type printing apparatus claimed in Claims 1
to 4, characterized in that the bell-crank lever 36 pivoted at 35 rests with the
roller upon its horizontal arm on a disc 38 formed with a recess 39 so that when
the grippers 13 close the circuit the electro magnets 42 attract the armature 41
and thereby cause the support to release the lever-system 36, 34, 33, and allow
the horizontal lever-arm to drop and reverse the double locking-lever in a manner
as to bring it into engagement with the swinging bearings 28 of the discs 29 and
thus prevent the printing, substantially as described.
6. A form of construction of the type printing apparatus claimed in Claims 1
to 5 characterized in that the gripper-shaft 12 fitted with a toothed wheel is
operated by a toothed segment 16 pivotted to the end plate of the press-cylinder 9.
such toothed segment having at its free end a roller adapted to run upon a fixed
disc formed with a projecting portion 19, substantially as described.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.