DE1774124A1 - Web tensioning device - Google Patents

Description

Anrield ■ / rin: Harris-int or type Corporation, Delaware

55 Public-.Square, Cleveland, Ohio 44113, USA.

isiincptainvorriuhtung

The invention relates to a device for holding a slot- moving web below a nominal tension value, in particular a tensioning device, which has a measuring device for measurement

a deviation from the voltage setpoint and a device to change the web speed depending on the ileßeinrichtung h-.t to regulate the deviation of the web tension away

The invention specifies a web tensioning device, that keeps a moving web at a voltage setpoint, by regulating the running speed of the web, and that quickly un'i -exactly the 3c changes in order to quickly correct the deviation deviation.

The invention furthermore provides a web tensioning device -vn ^ ev & bon, where a Sr.linantriebüwalze is driven by an elastically deformable V / alae and the printing system between 1 or. W ^ 1 ζt. η -χ ι ■■ iiiufgeucinviiili ^ Jid t 'ύαν Ii. -hu cos-tir-uit and a ./,·] i.:.i')t')r; i <·; Or- '^ ican-La-e ir./i.-ohen doii *; ·: ■ 1 ^ <: Xl depending on voji <ilin: v i.'hr.iJ-rinnün.' ^ - julA / ei oitun ^; -. dear ^ rt, in order to thereby to the Aufhebuiu; the deviation to change the web travel speed.

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The invention also provides a web tensioning device which the Steliaotor is part of a servomotor system with auxiliary power ■■ -'- and immediately after receiving a very high voltage drop deviation s signal s from the heating device quickly the web tension ". '

regulates.

The invention also provides a web tensioning device who has the measuring device a hot member, which by feidefliag the Orbital tension is movable and generates a tension deviation signal, which is transmitted to the servomotor by the servomotor system with auxiliary energy and a movement of the actuator of the servomotor causes which is much greater than the movement of the measuring element.

The invention also provides a web tensioning device

a fluid pressure ^ light weight system to operate a servomotor is used to control the web speed, and in the one measuring device with a flap, the two nozzles is assigned, movable from a zero position when the web tension changes is to disturb the equilibrium of the fluid system that operates the servomotor, which in turn applies the web tension to the Setpoint adjusts, after which the adjustment of the web tension in turn causes the flap to move in its zero position.

The invention also provides a web tensioning device in which the servomotor has an actuating membrane, which separates the various pressure zones, and each nozzle de * measuring device is connected to one of the pressure zones, so that when the flap is moved, a change in the pressure of the pressure zones is effected.

The invention vii \ l forner a tensioning device iin ^ eijiii.-itin-, in which a üchwenkw.-ilzs an.der B .- ^ hn rests and is depending on changes in tension moved as well as two

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Nozzles on each side of the hinged cylinder and separate flaps Nozzles to., Are arranged so that; 5 the pressure in the pressure zones in the Servomotor proportional to a mean value of the web tension the opposite sides of the swing roller.

The invention also provides a belt clamping device specified with a web drive, which has a drive roller driven by a motor, one drivingly connected to the web A driven roller and an intermediate drive roller which is rotatably supported by a bushing and with an elastically deformable one The surface is in pressure contact with the surface of the drive and driven rollers, with the web speed as a function is changed by a web tension deviation by moving the bushing around an axis that is eccentric to the axis of rotation of the drive wiper roller lies, whereby the printing system between the

elastically deformable surface and the surface of the drive and Output roller is changed.

The invention will be explained in more detail with reference to the drawing. Show it"

Fig. 3 is a schematic view of a web tensioning device according to the invention; _;

Fig. 2 is a side view of the Baiinspannvor direction of Pig.ij with some parts omitted;

Pig.3 is a sectional view taken approximately along line 3-3 by Pig.2;. and ■

Fig. 4 is a perspective view of part of the web tensioning device according to the invention. '

The invention provides a web tensioning device, ' which the tension ein..r fast moving flexible babil '■

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that of paper keeps constant. The web tensioning device according to of the invention can be used in conjunction with any web processing device, in particular a printing machine or a web folding device. The execution example of the balin clamping device According to the invention, the web is in the path of movement between the web feed roller and the web processing device held. The web tensioning device has a speed-adjustable back drive, and the web tension is through Regulation of the speed of the web drive regulated. A servomotor system with auxiliary power is used to increase the speed of the railway

P drive fast on receipt of a web tension deviation signal to change and to quickly generate a path speed that the The web tension setpoint is quickly restored.

A web tensioning device 10 is shown schematically in Pig.1. The web tensioning device 10 is between the web feed, shown here as a paper roll 12, and a not shown Lahn processing device shown. The web processing device can be of any desired construction, for example a printing machine or a web cutting and folding device or a combination be of it.

The web tensioning device 10 generally has a web drive 16 through which the web W runs and which is operable to drive the web. The web tensioning device 10 also has a servomotor system 18 with auxiliary power, which quickly changes the speed of the web drive 16 if the tension of the web W deviates from the setpoint determined by the requirements of the web processing device. The web tension of the web M is constantly "duck a Baiinüp -. Well _ö sr, iei3üinrichtung 20 someone who in the usual

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Formed execution si) egg game has a swivel roller 22 that is on the web is in contact. The pivot roller 22 is pivotable through Resilient holder 24 mounted, allowed a pivoting of the roller 22 depending on the websp.-i-inung in the direction of arrow X. The web tension measuring device 20 is effective with the Servomotor system 18 connected to auxiliary power to increase to effect the web speed if the web tension increases, and to cause a decrease in the web speed, iall the web tension decreases. It can be seen that the tension is on the outlet side of the device is regulated. In the preferred embodiment according to the invention

the web ¥ at the beginning of the supply roll 12 as described led to the web tensioning device. The web VT is unwound from the holle 12 under a guide roller 25 and duroh

the web drive 16 out. The web then runs around an auxiliary roller 26, then wraps around the pivot roller 22 and is then under an auxiliary roller 27 guided to the web processing device.

The 3ahnantrieb 16 has a drive roller 28 by any suitable engine such as driven by a motor, and a driven roller 30. The driven roller 30 works with a Pinch roller 32 together to form a drive nip 34 therebetween result through which the web W runs and is driven. the Drive roller 28 and the driven roller preferably have one The surface is made of a bright material such as steel, and the drive movement is carried out between them by an intermediate drive roller 36 Transfer. Die'Antriebszwiaαhenwalze 36 has an elastically deformable surface 38 and ίε-'t _o / jehaltert that the surface 38 in pressure & nlcgu to the relatively harder surface of the drive and output roller 28 or '. 30 stands, IUe elastically deformable

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Surface 38 of roller 36 can be any suitable resilient '/' is made of rubber or a plastic that is Maintains elasticity for a long time with frequent deformation.

The speed at which the output roller 30 rotates »is through the existing pressure system on the 'Jufang between the elastically deformable Surface 38 of the drive pinion roller 36 and the The surface of the drive and output roller 28 and 30 is determined. the The angular speed of the driven roller 30 is determined by changing the contact in the circumferential direction between the elastically deformable Surface 38 and, the output roller 30 and the system between

W of the drive roller and the intermediate drive roller 36 are determined.

The greater the circumferential pressure system between the elastically deformable surface 38 and the driven roller 30, the greater the angular velocity of the driven roller 30 and the smaller the circumferential pressure system between the drive roller 28 and the surface 38, the greater the angular velocity of the intermediate drive roller 36, where in in both cases the speed of the iJahn \ i is increased. The size of the peripheral system between the rollers is formed by a servomotor 40 which is part of the auxiliary energy system.

The servomotor 40 has a pressure-tight housing 42, which forms an internal pressure channel .r, the pressure zones 44 and 46 by a Membrane 50 is divided. The membrane 50 is suitable on the housing 42 attached to separate pressure zones 44 and 46. One Actuating rod 52 is suitable. Connected to membrane 50

'because the pneumatic pressure in zones 44 and 46 is essentially

borrowed the same, oo that the one on opposite sides the pressure exerted is equal to 50, the

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Operating rod 52 of the diaphragm 50 still · When theDruok is in a of pressure zones 44 and 46 sloh changes, the pressure balance becomes • the pressure zones disturbed, eo that the Menbran 50 to the zone with the lower pressure is moved or curved, which is a corresponding

Movement of the actuating rod 52 causes. The movement of the actuating rod 52 results in movement of the intermediate drive roller 36 to simultaneously the circumferential printing system with the rollers. 28 or 30 to increase or decrease or vice versa, what from 4's Direction of movement of the actuating rod 52 depends

The operating rod 52 moves the intermediate drive roller 36 * Via a lever 54 which tightly steers at the end of the rod 52 let · Dae

The lower end of the lever 54 carries an eccentric bearing 56, since the roller 36 is rotatably supported. Its movement of the lever 54 in the direction T causes a movement of the Löger 56 u an Aoh i. _f :. the eccentric to the rotation ··! ·· B of the shaft $ 6 114Ct ₁ UHd changes the pressure between the elastically deformable surface 38 and the relatively harder surface of the drive and output scales 28 and 30.

The pressure in the pressure zones 44 and 46 is regulated by a pneumatic circuit 60, which is part of the auxiliary power servomotor system ^ 18 is. The circuit 60 has a suitable source of air pressure 62 · Die Pressure source 62 can have a motor, dir an air compressor drives, and the outlet of the air compressor let connected to an air line 64. The air pressure in the Leitunis 64 is through

a manually adjustable automatic control valve 66 regulated " The compressed air in line 64 is distributed to lines 68 and 70, the separate air lines to pressure zones 44 and 46 of the servomotor 40 represent. Each of the lines 68 and 70 has ■

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two nozzles 68a and 68b or 70a and 70b (Fig. 4) The nozzles 68a and 70a are located on one side of the pivoting roller 22, while the nozzles 68b and 70b are arranged on the other side of the pivoting roller 22 (Fig. 4 ). The nozzles are open to the atmosphere and continuously deliver a calibrated amount of compressed air from lines 68 and 70 to the atmosphere. As will be seen further below, the pivoting of the pivoting roller 22 of the web measuring device 20 controls the amount of compressed air emitted by the nozzles 68a, 68b, 70a, 70b. The amount of compressed air delivered to lines 68 and 70 is controlled by a voltage control valve 90 and a system calibration valve 91 which are essentially fixed passages at any desired voltage set point. The nozzles and valves are interconnected so that they perform a pneumatic puncture, which is similar to ^{the electrical puncture of the Wheatstone 1 see bridge.} By changing the compressed air output in lines 68 and 70, the air pressure in pressure zones 44 and 46 of servomotor 40 is controlled.

In the example shown, there are two nozzle blocks 74 and 76 the outlet ends of nozzles 68a and 70a and 68b and 70b, respectively so that they face each other separately. The nozzle blocks 74 and 76 carry flapper valve bodies 80 and 82, respectively. The flap valve bodies 80 and 82 are preferably flat plates of spring material and at their upper end on the nozzle blocks 74 and 76 by suitable means Fasteners secured. The valve bodies 80 and 82 extend between the opposite ends of the associated

Nozzles, and their lower ends terminate under the nozzle block. the Valve bodies 80 and 82 are connected at their lower ends to bearings 84 and 86, respectively, which are the opposite ends of the pivot roller 22 carry for rotation by means of adjustable rods 88 or 89

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The valve bodies 80 and 82 have a zero position (Pig.1), in which they are essentially equidistant from the outlet ends of the opposite nozzles are separated. Moving the valve bodies 80 and 82 towards the nozzles 68a or 68b reduces the compressed air

release of the line 68, so that the pressure in the line 68 and so that the pressure zone 44 increases. The control pressure generated by line 70 in zone 46 drops at this point in time. These

Changes in pressure actuate the servomotor 40 to make the actuations' rods 52 and the lever 54 to move to the right (? ig * 1)> eo that the pressure application * between the elastically deformable surface 38 and the driven roller 30 increased and the printing system between the output roller 28 and the surface 38 is reduced will «This condition occurs, wtnn die Sohwenkwalie and in particular camps 84 and 86 move to the right »(Jig.1) in a row increased web tension or an overshoot of the setpoint the web tension have moved. The enlarged printing system between the rollers 30 and 36 and the reduced pressure equipment between them the rollers 28 and 36 increases the angular velocity of the Abtrlebswalze 30 proportional to the increase in the web tension above the setpoint value and the speed of the web W to the web tension on the

Reduce the setpoint. When the web tension drops, it moves the pivoting roller 22 is back in its contact position and the pressure in the zones 44 and 46 is balanced when the target value of the web «· voltage is reached again. ZweCicmäÜigerweiee can for the B - Serve a pressure gauge 69 in the line 68 may be provided. Of the

Pressure gauge 69 can be calibrated to provide a constant direct reading the actual line tension of the web W to allow. .Venn on the other hand, the valve bodies 80 and 82 to the

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When nozzles 70a and 70b move, the air pressure in zone 46 increases , accordingly, so that the membrane 48 pushes the actuating rod f> 2 'and the lever 54 moved to the left (jfig »1) · This movement of the lever 54 reduces the pressure between the orphans 30 and 36 and increases the pressure between the rollers 28 and 36 so that the running speed of the web W is reduced. This The state occurs when there is a reduction in web tension, which is corrected by reducing the web speed until the web tension reaches the target value.

From the foregoing description it can be seen that the pneumatic circuit 60 »q is set to create a pressure balance between the zones 44 and 46 when the web tension is applied the target value has · The circle 60 leaves: the equilibrium when the Web tension submits in a thread and changes quickly on the opposite side k dtJPj JWebren 50 acting pressure

different The fast · Bruokäiidftua * fünri ea an 8oh »» ll change in the speed of the output width 3O ₉ UB the deviation to ·· ζlevene. The change in speed of the output "w * l" 6 30 is proportional to the voltage deviation, since d * # valve 72 generates a pressure difference between zones 44 and 46 "dt · is proportional to the voltage deviation. .

The target operating status deeKreiaee 60 is set at operating level - start duroh setting of the pressure lh of the line 70 by Beta Adjustment of the valves 90 set «Duroh Ve * eteilen de» valves 90, a control pressure in the pressure 46 can be ereente, the proportional to the voltage setpoint is »in the vicinity · dae ganee System is operated. Eq such a web running speed is generated that the voltage setpoint is reached, which in turn causes a pressure in the line 68 and the zone 44, the

109826/0282 bathroom original

with the pressure in de * zone 46 is in equilibrium · When the pressures in zones 44 and 46 are in equilibrium in order to reduce the voltage bo11 * To ensure value, the pressure in zone 46 is the main control pressure which is exceeded by the pressure in zone 44, and the pressure in zone 46 decreases when there is an increase in stress occurs and vice versa when the web tension drops. So if the pressure in zone 44, which is determined by line 68> is equal to the pressure in the zone 46, which is determined by the line 70, the web is through the web drive 16 with a such speed in relation to the web processing

speed of the processing device is driven so that the desired value of the web tension required by the web processing device is reached "When the web tension increases, the holding arms 24 are bent and move the Itager 84 and 86 to the right (Fig.1)" which is a corresponding rightward movement the valve body 80 and 82 has to the Polga. The resulting pressure difference on the opposite sides of the diaphragm 50 causes an increase in the torques transmitted to the output roller 30 and in the web speed. Palis should occur a decrease in the web tension * move the bearings 84 and 86 to the left (for the Sohwenkwalze 22 in (Fig.1), so that the valve bodies 80 and 82 are also moved to the left (J? Ig _# 1) The resulting generated pressure difference causes a movement of the membrane 50 to the left and reduces the angular speed of the output roller 30 ao greatly that the

Web tension deviation is canceled.

The pneumatic circuit 60 according to the invention averages to a certain extent Way the web tension across the width of the web W. If a different voltage deviation across the web should occur ',' the pneumatic circuit 60 generates a path speed change

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corresponding to the mean value of the voltage deviations. One The tension difference across the web W leads to a different deflection of the bearings 84 and 86. The different deflection of the bearings 84 and 86 leads to a correspondingly different movement of the valve bodies 80 and 82. The different movement of the valve bodies leads to a different movement Compressed air delivery from lines 68 and 70 »depending» whether the The deviation is above or below the target value · The different compressed air output causes an averaged deflection the swivel roller. 22, since the air pressure in the associated pressure.

^ zone is always superimposed on the air pressure emitted by each of the two nozzles belonging to the train.

The amplification by the auxiliary energy of the Stellaotoreyetea 18 enables the exercise of a coarser Jtiaf t by the servomotor 40 on the drive asohtnwalie ^ 6 with only a small change in the web tension. Be has eloh prepared 'dii dae Sttllaotor-'. «Yetea with the help of the energy of Goddun« a visionary, >; of more than tine and unguidedWÖm HAI eo 'libi like a comparable meohanieohee flyetea has. The JBtellmotoriyit ta 1β ait help energy iet not only fast enspreohbar, e ^ Aern "ttöh slightly cloudy; all disproportionate aeohanie-high length. stt rules · '. '%

The response time of every country-specific part of the world is increased by the mechanical structure used. Duroh the Brfih · manure is mechanically Otetänge, the "ur Iegeänderung tor Atttriebszwißchenwalze is necessary 3fi, eehr kept small · The dureh the web-tensioning device 10 for moving the orphan 36 mechanical linkage used is more accurately depicted in Pig.3. How to prepare

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*. ■ ■

mentioned, the intermediate drive roller 36 is rotatably supported by the eccentric bearing. The eccentric bearing 56 has two eccentric bushings 96 a and 96 which are keyed to an axis 98. The ends of the axle 98 are rotatably supported on two separate holders 92 and 94 by suitable bearings 100 and 102. The bushings 96a and 96 carry the roller 36 rotatably about an axis which is eccentric to the axis of rotation of the axis 98. Rolling bearings 104 and 106 support the vfalze 36 rotatably to the bushings 56 and 96 · Preferably the bushing 96a is a piece of the lever 54, and by moving the lever 54 by the servomotor 40 the bushings 96a λ and 96 and the axle 98 become as one unit pivoted around the Aohse 98. Since the axis of rotation of the roller 36 is eccentric to the axis of rotation of the axle 98, the movement of the lever 54 just described moves the roller 36 towards and away from the rotating axle of the drive and output rollers 28 and 30, respectively. -

The holders 92 and 94 can, among other things, be swiveled around the achaa of an agate 110, as can best be seen from? Ig.2 * The eighth is rotatable from the side plate of the rail tensioning device 10 supported The holders 92 and 94 also support the servomotor 40

and the Klemmwalsse 32. Duron pivoting of the holding door are dia The intermediate drive is 36, the pinch roller 32 and the servomotor 40 old unit moved relatively to values 28 and 30, bit «laetitoh Deformable surface 38 of the drive asvitohanvalse 36 must be moved from the printing system with the drive and abutment forest 28 if the device 10 is not in use constant deformation of the elastic deformitrbaran Qbtrfläoh · 3Θ to avoid. By moving the pinch whales 32 wtg from the one with her cooperating output roller 30, the path V aut dtm Drive gap 34 released and the Durohzithen'dtr Bahn Vf duroh

109IJI / 02! BATH ORIGINAL

enables the drive gap 34 when the web feed starts again

The servomotor 40 is from the holder 92 by a suitable ^ Carrying body 112 worn. The pinch roller 32 is in precise alignment at the free ends of the holders 92 and 94 by a suitable camp 114 held. Ea can be seen that they are free in plant on the driven roller 30 by gravity and tension

the .bahn W can be pressed · A threaded member 115 allows the

Adjustment of the play between the roller 30 and the roller 32, if the holders 92 and 94 in the rest position for pulling the web on · ^ are upscale

The holders 92 and 94 are duroh around the axis of the Aohsen 110 a fluid motor 116 can be swiveled · The motor 116 is on his lower end hinged to the frame of the device 10 and has a piston rod 117 »which is attached to an attachment 118, the hanging from holder 92. Any suitable conventional control may be used to operate the fluid motor 116 to control the holders 92 and 99 to pivot and the arms 36 and 32 to and away from

- - ■ & 2Ά ■■ ■ - ■ '■■■■ · j ^ ν- ν-.

work with her / roll »* move.

The motor 116 is actuated to follow the breakers 92 and 94 move below into the lag «* u shown in? ig * 3, in which the

Drive 36 in printing system mn the bit her »ueaaaen-

· ■ '■■'! working drive and output shaft 28 b «w, 30 lit» Da · Auemaß

the initial Druokanlage between the elaetiaoh deformable Surface 38 and relatively harder surfaces of the co-working rollers 28 and 30 can be adjusted by means of an adjusting device 119. The adjusting device 119 has threaded members 120 and 121, which are carried by base bodies 122 and are carried in 120a or 121a of the adjusting screws 120 or 121, engages the

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Under width of the holder 92 or 94 and limit the deep lag ·, In The holders can be moved by actuating the motor 116, locking nuts 124 and 125 and screwing them onto the thread 120 and 121 and hold the screw heads 120a and 121a in their position relative to the holding blocks 122 and 125. By Suitable adjustment of the actuator 119 can reduce the initial pressure abutment between the elastically deformable surface 38 the roller 36 and the surface of the orphans 28 and 30 are set will.

The web tensioning device 10 also enables an adjustment of the relative circumferential contact E wieohen the elastically deforaable Surface 38 of the drive roller 3fi and the surface of the Vfalzen 28 and 30. The adjustment is made by two Bueheen t28 taken, which hold the holders 92 and 94 on the axis 110. Dl Sockets 128 have a central axis which is torn from the axis of rotation the axis 110 lies. By turning the Buohsen 12Θ relative to Eur Axis 100 will be the holder 92 and 94 and the Walt 56 relative isur iuitrie-bs- und AbtriebBwalBO 28 büw. ^ P Terichoben, · 0 * 4έΐ da · Aui Measure of the circumferential system * r how the tliÜett is reduced.

"" ■■ '"..." ■ ► ^: "■ ·' ^: ■ '""■;' ■■■■ - ■. ■ '■ .-

Before the Torriohtuöt 10 went into operation, the printing system

between the driving roller, the driving and driven roller 26 and 30, the IUMiWaIi * 56 and the "Abtri * b" vale · 50 dttföh adjustment of the Öt * lleinriohittÄ «* n 11 ^" ti9 and 128 "ing · 6divided. Also the valve bodies BO and 82 will share their full length duroli ttjr-β. The veret * llb "rin &""täng · 08 and 90" ingeetellt * the valve bodies 80 and 82 kU the bearings 64 and 86 to the pivoting whale «· 22 connect» The ioift pressure of the system is made by adjusting "the valve 66 and by adjusting the voltage divider valve $ 0"

set in the air line 70, which sets the control pressure in the pressure *

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-ιί- "

zone 46 is generated in oil weight with the pressure in the zone

is when the pivot roller 22 is not deflected from its operating position will. As soon as the web tensioning device 10 is set, the operation begins as labeled and any deviation of the web tension from the nominal value caused by the specified setting of the Device is determined to be fast by changing the speed of the web drive 16 corrected. When the Bahnverarbeilbngseinrichtung is switched off, the fluid motor 116 is operated to pivot the old 92 and 94 about the axis of the jack 110, so that the elastically deformable surface of the drive intermediate roller 36 from the printing system on rollers 28 and 50 as well the pinch roller 32 is moved out of the Druokanlfcge on the output roller 30 will·

Claims

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Claims (1)

9.4.1968 / : 2124 Claims 1. Device for keeping a moving web below a tension setpoint, with a web drive, with a'Meßeinrichtung for measuring a deviation of the web tension from the setpoint, and with a device for changing the running speed of the web depending on the measuring device to the The web drive has a driven roller in-drive system on the web, a drive roller and a drive intermediate roller with an elastically deformable surface in-pressure system on the surface of the drive and driven roller, in order to transmit a torque between them, which punctures the Printing system between the rollers is characterized in that the device for changing the running speed of the web (W) has a device {18) and changing the printing system with a servomotor (40) which duroh the measuring device (20) can be actuated to change the printing system in the event of a tension deviation of the web, and with a em auxiliary energy respirator (60) for actuating * the servomotor has · a 2> An apparatus according to claim 1, daduroh gekennzei chn et that the Hiifsenergiesystem {60) is in equilibrium _t when the tension of the web (W) the nominal value has and DAFL di · measurement means (20) includes a swing roller (22) mounted on the web is movable and can be applied by variations in the web tension, and a! inrichtung (80,82,88,89) which brings in response to movement of the swing roller, the help power system out of balance and energizes the servomotor (40). BATH 109826 / (MIl 3. Device according to claim 1, characterized in that that the servomotor (40) is fluid operated and pressure zones (44,46), which are separated by an actuating member (50), and that the auxiliary energy system (60) has a device (6Sa ₉ 68b «70a, 70b, 80,82) to ensure an equal pressure in the pressure zones, if the 'web tension assumes the target value, and to generate a different pressure when the web tension deviates from the target value 4. Apparatus according to claim 3, characterized in that the means for generating the same pressure are separated , ITuidd nozzles (68a, 68b, 70a, 70b) for the continuous discharge of Fluid from each of the pressure zones (44,46) and a flap valve body (80,82), which is dependent on a deviation of the Web tension is movable to the fluid pressure flow through at least to change one of the fluid nozzles, so that a yiuiddruckdifferenz is generated in the pressure zones dea Stellnotora (40) 5. Apparatus according to claim 4, that the auxiliary energy system (60) has a compressed air source (62) so that each fluid nozzle has an air outlet nozzle (68a, 681, 70a ₉ TOb), which is located separately opposite the other nozzle in order to open up the atmosphere re to derive, and that the flap valve has an elongated valve body (80,82), of which a portion between the outlet nozzles is arranged in the air flow emitted by them, so that the movement of the valve body to an outer direction is caused by them delivered air volume, reduced and the pressure in dtr to the one Nozzle belonging fluid line (68.70) is increased 6. Apparatus according to 'claim 5, characterized by an auxiliary roller (22) in the path of movement of the web {¥) between the output roll (30) and the web processing device, the is wrapped by the web, through a device (24) for 109826/0282 BAP ORIGINAL Support of the auxiliary roller for movement proportional to the tension of the web, and by a flap valve body (80,82) with the Auxiliary roller connecting device (88,89) for movement proportional to the movement of the auxiliary roller. · 7 · 'Device according to claim 6, characterized in that it is marked net, that the holder (24) allows for the ^ti ilfswalze (22) tilting the auxiliary roller, when the tension of the web (W) \ is uniform across its width, and that a second flapper valve body (82) operatively connected to the auxiliary roller at a Point is connected, which is separated from the connection point with the other flap valve body (80), so that the valve body move differently when the Hilfewalee is tilted, and the discharge of fluid from the separate KLuidlinien. (68.70) in order to generate a pressure in the associated pressure zone (44 * 46) of the servomotor (40) which is proportional to an average value of the voltage deviations over the web width i «st _# 8. The device according to claim, characterized in that a second pair of nozzles (68b, 70b) for the second flap valve body (82) is provided that each of the nozzles of the second ( Paers in fluid communication with an associated one of the nozzles (68a, 70a ) of the other flap valve body (80), so that the different movement of the valve body causes a different fluid discharge from the connected nozzles and a fluid pressure in the associated pressure zone (44 | 46) which is proportional to the mean displacement of the auxiliary roller (22) 9 · Device according to claim 1, characterized by a holder (56) which rotatably revolves the intermediate drive roller (36) BATH ORIGINAL 109826/0282 an axis (A) which is eccentric to the axis of rotation (B) of the drive roller is, stores, and also a device (52,54) connecting the holder and the servomotor (40) so that the holder about the eccentric axis when the servomotor is actuated and a resiliently deformable surface (38) of the intermediate drive roller is movable in different pressure systems on the drive roller (28) and the driven roller (30). 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