US1742029A - Means for raising, changing, and driving the paper-web rolls in printing machines, and more particularly in rotary printing machines - Google Patents

Description

Dec. 3l, 1929. AA. FALLO-r 1,742,029 MEANS Fon RAISING, CHANGING, AND DRIVING THE; PAPER WED ROLLS IN PRINTING MACHINES AND uom: PARTICULANLI IN ROTARY PRINTING nAcHINDs Filed-Nov. 9, 1925 l 4 Sheets-Sheet l Fig-2.

] redfi'o, deceased Dec. 3l, 1929. l A, FALLOT 1,742,029 MEANS FOR RAISING, CHANGING, AND DRIVING THE PAPER WEB ROLLS IN PRINTING MACHINES AND MORE PANTICULARLY IN ROTARY PRINTING MACHINES Filed Nov. 9I 1925 4 Sheets-Sheet 2 Dec. 31, 1929. A. FALLO-r I 1,742,029

AND DRIVING THE PAPER WEB ROLLS INPRINTING CHANGING, MACHINES AND MORE PARTI MACHINES GULARLY IN ROTARY PRINTING Filed Nov. 9, 1925 MEANS FOR RAISING 4 Sheets-Sheet 5 Illl ||II Dec. 31, 1929. A. FALLOT 1,742,029 MEANS FOR RAISING, CHANGING, AND DRIVING THE PAPER WEB RQLLS IN PRINTING MACHINES AND MORE PARTICULARLY IN ROTARY PRINTING IACHINES Filed Nov. 9, 1925 4 sheets-sheet 4 Patented Dec. 31, 1929 UNITED kSTATES PATENT OFFICE- ALFRED FALLoT, D fEcEAsEn, LATE QEPLAUEN I. VoeTI., GERMANY, EY HARRY PRIESTER, EXECUTOR,

F BERLIN, GERMANY MEANS RoR RAIsINe, cHANeING, ANn DRIVING THE PAPER-WEB ROLLS I'N :PRINTING` MACHINES, AND MORE rARTrcULARLY IN ROTARY PRINTING MACHINES Application led November 9,n `1925, Seria1 No. 6B,006, and in Germany November 22, 1924.

This invention relates to improvements in means for raising, changing and driving the paper web rolls in printing machines and more particularly in rotary printing ma- 5 chines.

In rotary printing machines the raising 15 out of paper web. It is not adeqfuate to provide `a Winch or some suclrraising means Wi'tl out at the same time passing the nearly run out web to the auxiliary bearings to continue` feeding to the printing machine With' out stoppagewliilst the niain web support is 4liberated to receive the new or fresh roll of paper which can be hoisted into the main web `support by mechanical means.

' The invention solves the problem 'as'tl'ius which the Web changing is effected Whilst the paper guiding and the Web feed are of an ordinary type and-as'far as possible remain unaltered in design, the new web can be inserted during ordinary operation; the used up Weber roll can be 'ejected without stoppage and tearing and unequal. or irregular unwindinor of the. Web is avoided. It is to 'be noticed that the feeding of the web is rendered irregular by the fact that the rolls are not accurately circular Vand also the v.diameter ofthe roll decreases as the paper i's fed off so that special lmeans have -to be .provided to ensure uniformity of feed. The 40 ejection of the used up roll and the severing of the paper web can also be carried out Without interrupting the operation of the printing machin-e.

It has already been proposed to effect the feeding movement of the Web roll in rotary printing machines by means of an endless band which contacts frictionally with the roll. The' drive for the endless bandv is, according to this invention, used lfor regulating the unwinding of the roll and at the same. time for carrying out the mechanical changing of the AWeb roll. i

The invention is illustratedbyway of eX` ample in some typical forms in the accompanying drawings in which:

Fig. 1 'is a side View of a web feeding, ejecting and changing device according to this invention.

Fig. 2 is a partial front elevation in Which the transfer bearer for the ejector is only in` dicated. as regards position.

Fig. 3 is a sectional elevation of the ejectory of Fig. 1.

Fig. 4 is a side elevation illustrating the operations of transferring and ejecting.

Fig. 5 shows a modified form of Web feed.

Fig. 6 is an end View of a modified fornil of paper web feed with automatic regulation of the drive as the' feeding proceeds.

Fig. 7 is a side elevationin section through the centre plane of Fig. Gand looking on trie left hand upright.

' Fig. 8 is a section similar to Fig. 7- looking `on the-fright hand upright. 25 stated and does so by means'of a device in Fie.' .9e-Fig. 9d show details of the main adjulable supports for the Web with chain' drive.

` F ig. 10 shows a modified form of the inven- L tion as applied to a machine with horizontal supporting rails for the paper web.

In carrying the invention into effect according to the form shown' in Figs. 1, 27 the paper web is carried in the usual manner by a spindle p and is supported by two vertical uprights s. The bearings'l d `for the spindle p' are carried by threaded shafts 1' rotatably mounted in theuprights s on which the bear ings are slidably supported. The bearings d rise and fall with vthe rotation of the threaded shafts r and are fitted With ball bearingsaso as to ensure easy rotation of the web. roll spindle p. The threaded shafts are rotated through the bevel gears 1" on the shaft f, which may be operated either by hand (see Fig. 2) or bythe motor m (Figs. 2 and 6). The bear.-

ers d are arranged so that they can raise the spindle p ofthe paper web so high that the web can be freely unrolled, as shown in Figs. 1, 2. In the form shown in Figs. 1 and 2, an endless band u is arranged at an angle to the line of lift of the bearers d and the paper web is brought into contact with this band so that the movement of the band is transmitted to the paper web in a manner hereinafter described. As the paper web unrolls and becomes reduced in diameter, the roll ma be raised by the bearers d so that the web 1s ept in contact with the band u. When the paper roll has been nearly used up, and 1t becomes necessary to insert a fresh roll, the bearers d have raised the nearly exhausted roll bymeans of the motor fm., or the roll may be raised as and when required by the said motor, sufficiently high until the ends of the spindle p reach a position where they come under the transfer bearers which are located at each side of the machine and co-act with the spindle p in the manner described below.

The transfer bearers each comprise a slidable supporting arm a (Figs. 1 and 4) wluch at the end facing the upright s has an open topped bearing. The top edge of the carrier arm in each case is formed with rack teeth and has side projecting ledges which slide 1n suitable guides in the machine frame. The uprights s on each side have a bracket b and two lguide webs w, which latter form the guide slides and supports for the slidable carrying arm a, as can best be seen 1n the sectional v1ew Fig. 3. A spring a1,tixed at one end, the right hand in Fig. 1, to the machine frame and at the other to the carrying arm tends to hold this carrying or transfer arm in the positlon shown in Fig. 1. At the bearino end of the transfer arm, an inclined face is lformed at-a'l on the bottom thereof and directly under the open topped bearing in which the spindle p of the roll to be ejected may be placed fer purposes of transferring (Fig. 4) The open top of the bearing is so arranged and formed that the spindle cannot fall out after having been deposited therein. As the lifting bearers 0l are raised, the spindle p in rising first pushes Aback the transfer arms a against the action of their springs until the spindle p has been raised to a position over the open top of the bearing of the transfer arm a, whereupon the arm a springs back under the A'action of its spring a1 and the bearing of the transfer arm is then under the spindle p'. When the lifting bearers d are now lowered, the spindle p remainsbehind in the transfer bearers a and the fresh paper web can be inserted in the bearers d when these reach their lower position.v

Side cheeks b are formed on or fixed to the machine frame so that they lie outside the transfer arms with respect to thev central plane of the machine. These cheeks have inwardly projecting lips or ledges b1 which are curled up at the outer end, of the bracket formed by \the said cheeks so as to act as a bearing support for the ejected web spindle, see Fig. 1. A toothed wheel or segment c is keyed to a shaft c2 supported in the cheeks b and guide webs w, and this toothed Wheel meshes with the rack teeth formed on the transfer arm a. A lever 01 is provided for operating the toothed wheel or segment c. A stop non the cheek b is located to allow the transfer arm to pass freely when it is 1drawn back by the lever el but intercepts the spindle p resting in the bearings of the transfer arms. At a point above the lever c1, there is pivoted a bell crank lever one arm of which acts as a cutting lever to support a knifeover the web whilst the other arm g carries a roller engaging a cam formed on or fixed to the shaft c2. The severing lever g is mounted on a shaft f. The operating cam e for the severing lever g is rotated to operate the severing lever at the time of operating the transfer arm a. The

ell crank lever is acted upon by a spring g1 which tendsvto keep the roller of the lever against the cam a (Fig. 1). Two such severing levers are provided one on each side of the machine and the severing knife is thus supported at each ofl its ends across the machine, so as to cut the paper web from the ejected roll.

The endless band u is arranged at an inclination to the line of lifting of the-lifting bearers d. This band passes over two rollers 7c, the upper one of which is mounted on the shaft whilst the lower one is mounted in vslidable bearings for the purpose of imparting tension and is driven at the speed of feeding required for the machine. A band such as the band u may be used for applying a braking action to badly balanced or eccentric rolls but, as here described, it may also be used effectively as the drive for the web, so as to secure uniformity of feed.

When a `fresh web has been inserted in the bearers a3, these are raised until the roll comes into contact with the endless band u, where'- upon the roll is caused to rotate. The paper web is threaded over the guide rollers in the printing machine and Work proceeds. As vthe paper web is unwound and the diameter of the roll decreases the bearers l are raised and the roll kept in frictional contact with the band u to be driven thereby. When the indle of the roll reaches the upper position s i sliownin Figs. land 4, it pushes the bottom inclined face oz2 and thereby moves the transfer arm a to the left in Figs. 1 and l, until the spindle is over the open topped bearing. The spring a1 then causes the transfer arm a to return and the bearings of thetransfer bearer receive the spindle p. The bearers Z are now loweredl and a new roll inserted therein. When the freshly inserted roll has been raised so as to Contact with the endless .band u, the web is reeled off. and by a gumming stri the fresh web is joined to the old web and t 1ereafter the expended roll which is in the transfer bearer arms a is ejected and the web of paper severed from theroll by the action of the severing knife. For this purpose the llt( lever c1 is operated to rotate the toothed member c whereby the transfer arms a with the expended paper roll are pushed backwards.

roller arm of the bell crank lever g comes 0p- 4 posite the dip in the cam e, as can be Seen 1n Fig. l and under the action of the spring g1,

the lever g snaps round in a clockwise dlrection in Fig. l so that the severing knife severs the expended web from its roll. On returning the lever c1 .the transfer arm a is returned and the bellcrank lever g and the other parts operated therewith are also returned to their initial positions, under the ,action of the spring g1. All the parts yare then in order for t 1e reception-and feeding of the fresh paper e Vweb and Ithese operations are lrepeated each time a web requires to be changed.

The web canthus be changed, without stoppage of themachine, by a single workman. The' removal of the ejected roll andy the introduction of the freshiroll can be effected single handed by one and the same workman without stopping the machine.

In .Fig..5, the invention is illustrated as applied to a machine vfor simultaneously 'prlnting several-webs supported in bearers at different heights. The operation of the upper web changing transfer arm -is shown as being effected by a lever c3 located in an. easily accessible position and articulated to the lever o1 of the upper transfer arm. Other- 4wise the mechanism is, as will be readily f understood, merely a duplication of the mechT anism described with reference to Fig. 1. `It will be understood that the constructional details ofthe transfer arm and the ejectorv mechanism may be varied without departing from this invention; Y

In the form ofthe invention illustrated in Figures 6-10 the web feed and changing mechanism is providedl with automatic regulation means for controlling the drive as the 4web unwinds-the operation being yeffected by electric power. A In front of the 4rotary printing machine, there are arranged, as in the first described form, then rights s which carry the verticalthreade shafts r. These uprights have guides for the slidable lifting bearersd which are threaded on the shafts r so as to be raised or powered b lthe rotation of these shafts. The left han upright (Fig. 6) has means .for adjusting the'position of the web sidewise in the bearers d. The-threaded shafts 1* are provided with worm wheels r1 at their f upper ends, which Worm wheels engage with worm threads on the transverse shaft f, which is driven bythe electric motor m. A switch board L is supported on the upright and is arranged to control the direction of rotation I energized the coupling f1 is`thrown into enm and consequenly the solenoid remains ungagement under the action of its spring and the chain drive hereinafter described becomes operative. The two l1ft1ng bearers cl may thus be raised or lowered by therotatlon of the shaft f which may be effected either by the'motor fm asvdescribed or by the chain gear hereafter described and operating' through the coupling f1. Only one of these means can however operate atany given time.

Above the bearers (l .and mounted in the standards s, the transfer bearers are arranged. These have arms a with open'topped bearings as canbe seen in Figs. 7 and 8 and are acted yupon by springs al which hold these arms pressedforward into the path of the rising roll of paper. As in the rst described form the bottom face of the transfer arml is' inclined so that on contacting with the rising spindle the arm" is caused to slide'lagainst 4the action of its spring and when the spindle hasbeen raised suflicientlythe transfer arms spring'or snapv baclrto take the spindle p in the open topped bearings and leave the main lifting bearers free to be moved down without interference. t

Over the transfer bearer a there is arranged a switch lever k1 which is controlled by the rising movement of the bea-rer (l by engaging a striker bar h2 arranged on' the lefthand bearer d (Fig. 6). In this way the motorm is controlled so as to rotate the shafts 1' inthe opposite direction and to lower the bearers d. In a similar manner a switch -v lever h1 at the foot of the upright s is operated by a'striker h3 onv the sinkingbearer cl to cut out the motor when the bearers are inA position to receive a fresh roll.

As in the first describedform the web drive which is guided over two rollers k, k1. roller k1 is supported at the base ofthe uprights and is'driven at the speed of operation of .the printing machine, whilst the roller 7s is mounted in bearings slidable in slots /12 in the machine frame to tension-the band u. This tensioning 4is conveniently effected by means of a weighted lever k3, which tends to move the bearings upwards in the slots k2 and thereby stretch the band. The band is effected by means of an endless banflllu i 1e u is so arranged with respect to the bearers.. x

d and the transfer bearer arm a that the band u can operate simultaneously on the roll about to be ejected and on the freshly inserted roll. The paper rolls themselves are carried by the usual spindles p which rotate in ball or roller bearings in the bearers d.

As the diameter ofthe paper roll is reduced as the paper web is unwound, the drive effected through the endless band would eventually cease and it therefore becomes necessary to compensate for the diminishing diameter of the roll. Such compensation could be effected by hand, as for instance by switching on the motor m when the paper web had unwound sufficiently far and by raising the roll again bring it into effective operative contact with the band u, the motor being shut off whenthe adequate contact pressurebetween the roll and the bandhad been attained. Such a method would necessitate continual observat-ion of the paper roll and continual switching oil and on of the motor. From experience it has been found that the operator moves the roll up in a jerky manner and stretches the band as far as possible so as to reduce the frequency with which the raising operation has to be performed. The feed is therefore -irregular and frequently results in the rupture of the web in consequence of an abruptly applied frictional contact between the web and the band u. Even with careful control and watching, it would be impossible to obtain a raising movement of the roll by hand in strict accordance with the unwinding movement of the web.

According to this invention the paper roll drive and raising mechanism are arranged to co-operate so that the drive is automaticall regulated as the paper web is unwound. Xs the pape-r is unwound, the diameter of the roll diminishes and in proportion as this diameter diminishes so must the relation of the roll tothe driving band be altered.

In' order to effect this compensating adjustment a chain drive, illustrated in Figs. 6 9, is introduced at the side of one of the uprights s. A broad pinion o1 is provided on the spindle p or the teeth may be cut out of the spindle itself and this pinion is constantly in mesh with a toothed wheel o2 which drives a chain wheel 03 mounted on the same shaft therewith. This chain wheel engages a chain o which also passes over the chain wheels o* (Figs. 6 and 8) and thereby transmits a rotating movement to the toothed wheel o5 and the coupling f1. Through the coupling f1, when it is in engagement with the shaft 4f, the rotation of the ypaper roll spindle p is thus transmitted to the shaft f, worm wheels r1 and the threaded traverse spindles 7 which on` rotation raise the paper roll by an amount depending upon the rate at which the paper web is being unwound from the roll,

As the paper rolls are not always uniformly wound and as it is also necessary to adjust their position sidewise so as to secure proper `be rotated by a handwheel i2.

registering, the device shown more fully in Figs. 9"-9d is provided. On the left hand upright s a horizontal threaded spindle z' is mountedxin a casing '1 and this spindle can By these means a stirrup i3 mounted on the spindle i and engaging in a collar on the paper roll spindle p may be moved inwards or outwards to effect sidewise adjustment of the web. Springs, as indicated on the drawing, press the stirrup upward into the collar on the spindle p. After adjustment in the manner described the spindle p can be locked so as to prevent displacement, as for instance by a tongue t (Fig. G) engaging in grooves t1- on the spindle.

In order to give resilience to the chain drive between the chain wheel o3, toothed wheel o2 and the toothed wheel 01, the toothed wheel o1 and the chainwheel 03 are supported in a bearing carried on springs as indicated at o6 in Figs. 9 and 9a. By this means the drive yields to sudden shocks and thereby avoids breakages.

The operation of the device described for raising and changing the paper web, as well as for feeding the web to the machine, is as follows:

lVhen a roll has to be inserted in the bearers Zin the uprights s and the bearers have beeni lowered to their bottom positions, the roll is inserted and set in the correct centra-1 position by means of the hand wheel 712. The switch h is then operated and current supplied to the motor m and the solenoid f2 so that the coupling f1, is thrown out of engagement and the bearers d and the roll are raised until the roll comes into driving contact with the band u whereupon the motor m and the solenoid or magnet f2 are switched ofi' and the coupling fl'automatically cornes into engagement with the shaft f so that the chain drive through the toothed wheel ol on the roll spindle p becomes operative.

The movement of the band istransmitted to the roll and when the expended roll has been passed to the transfer bearers and a fresh roll inserted in the main lifting bearers d, this fresh roll soon acquires the speed of feed of the machine and is gummed to the web passing from the expended roll. At the same time the web from the expended roll is severed.. By the rotation of the roll spindle p, the toothed wheel o.1 drives the gear wheel o2 and chain wheel o3, whereby the chain o, chainwheel o, toothed wheel 05, and coupling f1 and shaft f are driven so as to rotate the screwed shafts r which raise the bearers d. The traverse screw shafts r raise the bearers in direct proportion to the drive imparted to the chain o by the unwinding paper roll so that the roll always remains in proper driving contact with the driving band u. Vhen the partially expended roll has been raised to the height of the transfer arm a.

this arm is pushed back and the upward movement of the bearers l continues until the transfer arm again springs under the vspindle p and receives the said spindle in its'D journals. The striker 71,2 then operates the switch lever tl and starts up the motor m so that the bearers d are lowered. The spindle y) remains .behind in the transfer bearers Whilst the main bearers (l arelowered to their bottom position. The chain drive `(0-0") does` not participate in the drive of the shaft r' in consequence of the coupling f1 being thrown out., as described above, when current is supplied to the motor m and solenoid or magnet f2. Vhen the striker [L3 on the bearer l operates the lower switch lever 71,1, the motor m and magnet f2 arecut out. The regulation of the reversable motor m may be effected from any desired point so as to' modify according to requirements the frictional contact between the band u and the roll by raising or lowering the latter.

The same principles may be applied to the automatic feeding and progressive movement of paper rolls which are mounted on horizontal or other inclined rails as is illustrated diagrammatically in Fig. l0.

The bearers al` for the paper roll are traversed by the threaded shafts 1'. The transfer bearers in the arms a, which are operated on by springs al take up the spindle from the main bearers al and retain this spindle p when the main bearers d are retracted. In this form also the roll is driven by an endless band and as the paper web is unvvound from the roll, the threaded rods fr' are rotated by suitable mechanism, such as a chain drive and the main bearers engaging said threaded rods are fed forward to maintain the contact of the paper roll With the endless band in a mannerto ensure uniform tensioning as in the above described modifications.

ln order to prevent excessive tensioning of the band u, a Weighted lever is provided as in the previous form so that the band can yield `by causing the lever to lift when any excessive tension is applied.

ln place of an endless band other frictional driving means may be used, as for instance some form 'of cam drive may be provided infy Which frictional discs'transmit the rotation to the paper rolland as the diameter of the roll diminishes andthe roller is raised, these discs may by means of a cam guide, be caused to approach the circumference of the diminished diameter, and be raised in company with the roll, in a ratio determined by the reduction of the diameter and the the roll. y

What is claimed is:

1. A device for lifting and'changing paper rolls in rotary and other printing machines Which print from the roll having lifting bearers to hoist the paper roll and to enable it to rotate freely and auxiliary bearers adapted traverse of A .to be automatically moved out of the path of the paper roll spindle on the forward traverse movement of the likfting bearers and after the lifting bearers have passed to automatically return intotheir original position and to pick up thepaper roll spindle on the Ieturn movement of the said lifting bearers.

2. A device for lifting and changing paper rolls in `rotary and other printing machines which print from the roll having lifting bearers to hoist the paper roll substantially vertically and `to enable it to rotate freely and auxiliary bearers arranged to pick the paper roll` spindle from the said lifting bearers which are mounted slidably transversely to the` line of traverse of the .lifting bearers so that they can automatically be pushed out of the path of the spindleroll When the saidspindle is l tion and allow the paper roll spindle to pass,

but `,on the return movement of the lifting bearers piek the paper roll spindle from the said bearers.

4'. A device for lifting and changing paper rolls in rotary `and other printing machines which print 4from the roll, comprising in combination, auxiliary bearers pivotally arranged at the upper part of the device and serving for taking up the spindle of the paper roll, lifting bearers fortaking u a fresh paper roll, means for moving the li ting bear,- ers substantially vertically into th`e proximity of the auxiliary bearers and for bringing the said spindle into engagement with the said 5. A device for lifting and changing paper rolls in rotary and other printing machines Which print from the roll, comprising incombination, auxiliary bearers pivotally arranged at the upper part of the frame of the device and serving for taking up the spindle of the roll to be printed, lifting bearers for taking up a fresh paper roll, means for moving the lifting bearers substantially vertically into the proximity of the auxiliary bearers, the said spindle being brought into engagement with the auxiliary bearer-s and other means for rotating the roll in the lifting bearers.

' 6. A device yfor. lifting and changing paper rolls in rotary and other printing machines which print from the roll, comprisingl in combination, auxiliary bearers pivotally arranged at the upper part of the device and 'serving for taking up the spindle of the roll to be printed, lifting bearers for taking up a fresh iis roll, means for moving the lifting bearers substantially vertically into the roximity of the auxiliary bearers, the sai spindle, being brought into engagement with the auxiliary bearers and a device for rotating the roll resting in the auxiliary bearers and the roll resting in the substantially vertically movable lifting bearers.

7 A device for lifting and changing paper rolls in rotary and other printing machines which print from the roll, comprising in combination, auxiliary bearers pivotally arranged. at the upper part of the device and serving for taking up the spindle of the roll to be printed, lifting bearers for taking up a fresh paper roll, means for moving the lifting bearers substantially vertically into the proximity of theauxiliary bearers, the said spindle being brought into engagement with the auxiliary bearers and a fractional device for rotating the roll resting in the auxiliaryvbearers and the roll resting in the substantially vertically movable lifting bearers during its movement towards the auxiliary bearers.

8. A device for lifting and changing paper rolls in rotary and other printing machines which print from the roll, comprising in combination, auxiliary bearers for taking up the spindle of the roll to be printed, lifting bearers for taking upv a fresh paper roll, means for moving the lifting bearers into the proximity of the auxiliary bearers, other means enabling the said auxiliary bearers to automatically take up the spindle of the said fresh roll when lifted and nearly unwoundthe said spindle being brought into engagement with the auxiliary bearers, a frictional device for rotating the roll resting in the auxiliary bearers and the roll'resting in the lifting bearers during its movement towards the auxiliary bearers and an apparatus for eject-ingV the expended roll in the auxiliary bearers preliminary to the spindle of the fresh roll being brought into Contact with the said auxiliary bearers.

9. A device for lifting and changing paper rolls in rotary and'other printing machines .Which print from the roll, comprising in combination, auxiliary bearers for taking up the spindle of the roll to be printed, lifting A bearers for taking up a fresh paper roll,

means foi` moving the transport bearers into the proxlmity of the auxiliary bearers, the

said spindle being brought into engagementV with the auxiliary bearers, a frictional device for rotating the roll resting in the auxiliary bearers and the roll resting in the lifting bearers during its movement towards the auxiliary bearers, -and an automatically operated apparatus for sliding the auxiliary bearers transversely to the line of movement of the liftinfr bearers in order to eject the un- Wound roll preliminary to the fresh roll bemg brought into contact with the auxiliary bearers.

'ment towards the auxiliary bearers, an apparatusfor ejecting the expended roll in the auxiliary bearers preliminary to the spindle of the fresh roll being brought into contact with the said auxiliary bearers, said auxiliary bearers being adapted to be pressed yieldingly backward when being engaged by the spindle of the fresh roll and to be pressed forward after the said spindle has passed the free ends of the said lifting bearers, thereby bringing the bearing surface of the last mentioned bearers into engagement with the said spindle.

11. A device for lifting and changing paper rolls in rotary and other printing machines which print from the roll, comprising in combination, auxiliary bearers for taking up the spindle of the roll to be printed, lifting bearers for taking up a fresh paper roll, a device for ejecting the unwound roll, an electric motor for moving the lifting bearers into the proximity of the auxiliary bearers in order to deposit the spindle of the fresh roll in the same,'and a web feeding band in frictional engagement with the partially unwound roll and with the fresh roll simultaneously.

12. A device for lifting and changing paper rolls in rotary and other printing machines which print from the roll, comprising in combination, auxiliary bearers for taking up the spindle of the roll to be printed, lifting bearers for taking up a fresh paper roll, a device for ejecting the unwound roll, an electric motor for moving the lifting bearers into the proximity of the auxiliary bearers in order to deposit the spindle of the fresh roll in the same, a web feeding band in frictional engagement with the partially unwound roll an with the fresh roll simultaneously and a compensating drive operatively connected to the spindle of the fresh roll and operating to compensate for the 'diminishing diameter of the roll as the paper web unwinds and thereby maintain the roll in driving contact with its feeding band.

13. A device for lifting and changing paper rolls in rotary and other printing machines which print from the roll, comprising in combination, auxiliary bearers for taking up the spindle of the roll to be printed, lifting bearers for taking up a fresh paper roll7 a device for ejecting the unwound roll, an

lll

meaoae msm. for cutting out the said compensating drive when the motor moving the lifting hearers is in operation )afndJfor throwing in the said compensating drive when the motor is cnt out., f

A device for lifting and changing paper rolls in rotary and other printing machines 'which print from the rolls comprising in e'omhiiiation9 auxiliary bearers for taking np the spindle of the roll to he printed, lifting bearers for ltalking np a fresh paper roll, a device for ejecting the nnvvound roll, an electric motor for moving the lifting bearers into the proximity of the auxiliary bearers in order to deposit the spindle of the fresh roll in the same, awel) feeding hand in frictional engagement with the partially un- 'Wound roll and With the fresh roll simultaneously, means foradjusting the plane of the paper web 1n respect to the center plane of the printing machine to secure register tional engagement With the artially un- Wound roll and With the fres roll simultaneously, switch control levers for cutting out or reversincf the rotation of the motor operating the lifting bearers and strikers on the lifting bearers for control levers.' i I 17. A device for lifting and changing paper rolls in rotary and other printing machines which print from the roll, comprising in combination, auxiliary bearers for taking up the spindle of the roll to he printed, liftingl bearers for taking up a fresh paper roll.,

operating the switch a. device for ejecting the unWound roll, an'

electric motor for moving the lifting hearers into the proximity of the auxiliary bearers in order' to deposit Jthe spindle of the fresh roll in the same, a web feeding hand in frictional engagement With the partially un- Wound roll and with the fresh rollsirnnltaneously and a severing mechanism for severing the nnwound Web from the rest of the paper on the spindle at a predestined moment.

ln testimony whereof ll have signed my name to this specification.,

' `HARRY PRlESlER,

v ccntor of Alfred Fallot, dececnseol and other means for locking the web in thes l adjusted position. l

l5. A device for lifting and changing pan per rolls in rotary and other printing machines which print from the roll, comprising v in combination, auxiliary bearers for taking np the spindle of the roll to be printed9 lifting bearers for taking up a fresh paper roll,

, a device for ejecting the unvvound roll, an electric motor for movlng the lifting bearers y up the Aspindle of the roll to be tional engagement with the 'taneously into the proximity of the auxiliary bearers in order to deposit the 'spindle of the fresh roll in the same, a web feeding hand in fricpaltially nn- Wound roll and with thefreshfroll simuland automatically yoperating switching means yfor controlling i/the opera tion of the electric motor moving the lifting 16. A device for lifting and changing paper rolls in rotary and other printing machines which print from the roll, comprising in combination, auxiliary bearers for taking rinted, liftlng bearers for taking upa frcs paper roll, a device for eject-ing the unwound roll, an

- electric motor for moving the lifting bearers into the proximity of the auxiliary bearers, 1n order todeposit the roll in' the same,- a web 'feeding hand in fric-n spindle of the fresh elle ich

liti

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