DE2223396A1 - Copier - Google Patents

Description

Copier

The invention relates to a copier, in particular for electrostatic operation, which can be used as a desktop device and for copying all kinds of originals in the form of loose leaves of any basic color and provided with a picture on one or both sides is suitable.

More particularly, the invention relates to improvements in electrostatic copiers that operate with feed, of the sensitized paper working from a supply roll, in particular on the supply roll accommodation and its training in such a way that their replacement is very easy for the operator, as well as the mechanism that controls the drive, guiding and cutting the paper from the supply roll and the mechanism that causes the original to be guided, the concentrated developer (toner) to be replenished automatically, and the copies to be collected.

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The aforementioned main object has thereby been achieved in accordance with the present invention solved that the supply roll of sensitized paper rests on support rollers that are rotatable on shafts, and laterally is adjustable by adjustable stops.

The details of this device and the other the subject matter Improvements forming the invention will become apparent from the following description of a preferred embodiment, which the application of the mentioned improvements to an electrostatic table-top copier of very compact Design as described in IT-PS 873 185 shows. This copier, which is suitable for reproduction on a 1: 1 scale, is characterized by a stationary lower part, which comprises the developer station with the supply means, and by a top part which can be pivoted about hinges is formed and includes the optical projection area and the group of parts for pressing the original. The attachment the aforementioned improvements to this type of device, its internal parts both for the supply of the developer and for the monitoring of the copy sheet feed accessible while maintaining complete electrical and mechanical operational safety provides a clear example of the benefits made possible by these improvements, and therefore will -be described below by way of example with reference to the drawing. In this show:

Fig. 1 is a left side perspective view of the copier;

FIG. 2 shows a complete central section of the one shown in FIG Copier;

FIGS. 2 to 13 a left-hand partial section of the copying device shown in FIG

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FIG. 3 is a left-hand side view of the one shown in FIG. 2 Copy device after removal of the cover to the supply roll exhaustion warning device to make visible;

FIG. 4 shows a partial section of the copying device shown in FIG ;

Fig. 5 is a perspective view of the centering device for the supply roll of sensitized paper;

Fig. 6 is a cross section through the drive mechanism for the movable cutting knife for the maximum copy sheet length;

Fig. 7 is a cross section through the paper feeding device; Fig. 8 is a plan view of the original insertion surface;

Fig. 9 is a side view of the automatic feeder for the concentrated developer;

FIG. 10 is a plan view of that shown in FIGS. 6, 7, 9 Device and

11 shows the mode of operation of the device electrical circuit-.

In the following description, only the features of the invention will be explained in detail, which relate to the the latter referring characterizing parts, while with regard to the parts which are based on the known features of the copying machines based, reference is made to the general characteristics which can be seen from FIGS. 1, 2, 2 to and 4.

Fig. 1 shows a table electrostatic copier

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with a lid 200 'The latter is from a lower one Front section 201, a right side section 3, a left side section 4 and an upper section 5, the serves as the actual cover, assembled.

On the front side of the device, a movable, middle upper part section 6 is also arranged around the joints 57 can be pivoted forward. This section 6 can pivot independently about the joints 22 and is in this pivoting process connected to section 5. In the recess of the upper part section 6 there is an end part 217, which can be pivoted about the pin 202. The section 5 together with the device section covered by it, the Section 6 and the frontal part 217 are able as a whole to pivot around the joints 22 that part of the path of the Originals is exposed.

One of the side sections 3 and 4 can be pivoted about joints attached to the base plate 9 and the other can be removed connected to the base plate 9 in order to enable operating interventions after loosening suitable fastening elements. The entirety of the sections mentioned and the parts connected to them are attached to the base plate 9.

The structure of the device (Fig. 2, 2 bis, 3, 4) is further characterized by two sub-parts, namely by the fixed part B and the movable part B ^f , of which part B is the development station and the corresponding accessories and the part B ¹ comprises the housing parts for the sensitized paper and the associated control members, and by an upper section A which is pivotable about hinges and which contains the optical, lighting and exposure stations. On the face of the device is a slot flO4

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arranged, the for introducing the original D along a Level 205 is used, which limits the cover in accordance with the front section 201 and with two lateral adjustment elements 206 is provided. A slot 207 is located below the level and delimited by level 212 for manual use Inserting a sensitized sheet of paper is suitable as an alternative to using a supply roll. The adjusting links 206 are adjustable and are arranged by a slide 208, which is on the right side of the plane is controlled so that they are always in a symmetrical position to the device center axis and ensure that the original is centered with respect to the optical system. The original placed by the operator on level 205 is first guided between a pair of rollers 211, which begin to revolve when the device is switched on by the main switch is, and from this point onwards it goes through its illumination path 17 and its ejection path 16 on the upper part A of the device, as can be seen from Fig. 2 to. The symmetrical Adjustment of the two adjusting elements 206 is made by engaging a toothed rack section 320 of the same with two diametrically opposite points of a single gear 322 allows. The slider 208 rotates the gear by means of a cord 324.

An exit housing part 201 is in a lower, central position and parallel to the slot 207 of the lower section 201 arranged and contains the suitable for receiving the copy sheets drawer 210, which in the direction of the device front side can be pulled out. The copier is by a small, not shown in the drawing Electric motor driven, and on the part 5 of the lid an on and off button 19 is attached to the motor

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acts, which gives movement to the sensitized bow and the original · Vorsghub-System. Next to button 19 is a warning lamp S is arranged, which indicates the operating state of the device. On the other side of button 19 is a second warning lamp 20 is arranged, by means of which the operator the light intensity more suitable for copying the original selects. Several locking devices explained in detail for the device described in IT-PS 873 185 allow access to the internal parts of the device under absolutely operationally safe conditions.

2, 2 bis, 3 and 4 show the internal parts of the copier, divided into a certain number of sections, namely the insert, copy sheet feed and cut, the loading, the original lighting, the original ejection station, the optical device, the exposure, the development and the copy sheet exit station.

Two similar, spaced apart side walls 201, 201 'carry the upper part of the lid 200 and the other internal parts. They allow a precise mutual determination of the position of the parts and in particular the optical one Systems.

Each side wall is connected to the corresponding side wall lower part 23, 23 ′ by hinges 22. The level 205 of the import station, which is arranged horizontally and extends transversely to the device, is attached to the base frame and lies in one plane with the level 212; it acts as a carrier and guide for the original or the copy sheet, the latter being able to be fed by hand as an alternative to being fed from the supply roll. The plane 205 has an upwardly sloping portion that is close to the

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Entrance slot 204 is arranged and for guiding the original serves. The latter controls the levers 216, 215 located immediately behind the rollers 211 and the microswitches Press M 3 and M 4, which control the feeding and cutting of the copy paper, as explained below will. When the part 6 of the lid is opened by pivoting about the pins 57, the path of the original is accessible To make, the front part 217 pivots about the pin 202, the upper roller of the pair of rollers 211 from the lower one is removed so that an original accidentally jammed between the rollers is released.

The wound on the supply roll 218 rotatable around the pin 219 Copy paper is housed in a housing part which is covered by part 201 of the lid. The supply roll 218 rests on rollers 220, which are rotatable about axes 221 (FIG. 5). There is no friction between the copy paper and the rollers 220 because they are in contact with each other Unrolls on each other. This process is essential for the copy paper to be used in order to avoid any damage its coating and the corresponding visible changes in the finished copies.

The arrangement of the supply roll on the support rollers is particularly advantageous because it has a simple design with very easy handling by the operator. In fact, the copier devices on the market require that the supply roll is attached to suitable pegs, the overhangs of the outermost ones that occasionally occur on it Coils require considerable complexity of handling and, in addition to the ability to mount supply rolls of different widths, it is inevitable that

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the overhangs and the side * with the ones mentioned above Pins connected stops are moved. In contrast, according to the invention, there are two arms 222 on the device attached and not connected to the supply roll * the determine the lateral position of the supply roll} they are by a mechanism consisting of a loop of string 326 connected to these arms 222 diametrically opposite points, the cord loop on suitable, freely rotating * ble cord rollers 328 is movable. This mechanism ensures the symmetrical position of the arms along the device processing axis and thus the centering of the supply roll.

In a preferred embodiment, the support rollers 220 extend over the entire width of the supply roll, so that they pull off an equal length of copy paper on the right and left edge of the supply roll by means of their friction facilitate the paper and thus ensure a paper movement perpendicular to the axis of the supply roll.

Similarly, the first pair of drive rollers for the paper feed from the supply roll is arranged so that it Paper pulls only in a limited, central zone to prevent a pull difference between the right and the occurs on the left edge of the supply roll and causes the copy paper to deflect sideways. In contrast, can the placement on the support rollers can be limited to the central zone of the supply roll, but in this case it is it is necessary to ensure the correct drive effect on the right and left edges of the copy paper.

Other embodiments of the device can support devices use, which consist of revolving parts, which the supply roll in only a limited area Touch cross direction.

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These preferred embodiments offer a far-reaching tolerance to the effects of occasional deviations in the shape of the supply roll on the evenness of the paper print, namely as a result of the compensatory effect and self-adaptation of the system with regard to the occasional irregularities. An obvious advantage of the system described here is the lack of any size limitation for the supply roll core Supply roll 218 is removed, which indicates the exhaustion of the supply roll , so that it is easier for the operator to bring the leading edge of the new supply roll between the rollers 223 *

The feed of the copy paper takes place through the rollers 223. In a preferred embodiment of the device it is represented by two rollers driving the paper only in its central area. This is how the propulsion system becomes less sensitive to parallelism errors between the various axes that make the paper move can interfere by causing lateral shifts. Further, when the operator intervenes the leading edge of the paper has threaded the rollers 223 that this leads to incorrect centering with respect to the center of the device, this system is able to automatically return it to the correct position »The leading edge runs through the guide gen 225, 225S which they feed to the cutting device, The Guide 225 * can be used to make it easier to pull out the Lower sheets of paper that are occasionally caught in the area close in front of the cutter * The latter consists of a cutting knife 226, which rotates around the axis 227, The cutting surface is cylindrical in shape

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The axis corresponds to the axis 227. The knife edge has a helical course. The cutting knife 226 contacts a straight shearbar 228, which is able to carry out small pivoting movements about the axis 229 and in doing so by the spring 230 in Contact with the cutting knife 226 is maintained. The axes 227 and 229 are at a small angle to each other so that that the counter-blade 228 only contacts a single point of the cutting edge of the cutting knife 226 during its pivoting is in contact.

The actuation system of the movable cutting knife 226 is shown in detail in FIG. With the cutting knife 226 the lever 231 is connected, which rests against the pawl 232 in the idle state by being pressed against it by the compression spring 233 will. The other end of the compression spring 223 rests against the lever 234, which is held by the lever 235.

When the cutting signal is received, the pawl 232 is pivoted about its axis 236 by the pull rod 237, which with is connected to the electromagnet ET, and in this way the lever 231 (and the cutting knife connected to it) is below the action of the spring 233 pivoted. During its movement, the lever 231 meets the extension 238 on the lever 235, the thus pivoting and allowing lever 234- under the action the spring 239 to pivot about its axis. The pivoting movement of the lever 234 is also applied to the lever 231 and to the Transfer knife, which is so reset. The knife reset operation is subject to the need for an opening exists between the cutting knives 226 and 228 immediately after a copy sheet has been cut, namely around the To allow movement of the following sheet between the cutting edges.

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The pull rod 240, which is controlled by the nooke 241, resets the lever 234 and at the same time tensions the spring 233.

When the original is introduced into the device, it controls the rollers 211 further back, first the microswitch M 3 by means of the lever 216 and then the microswitch M 4 by means of of the lever 215. At this point, the electromagnet EA is excited and the pull rod releases the pawl 244 and locks it the one-circuit clutch 243 (this only performs one revolution off, whereupon it is locked again by the pawl 244) and rotates the rollers 223 * Der connected to this coupling Coupling process between the coupling 243 and the roller 223 is effected by a one-way - »(one-way) clutch 230 so that the roller 223 is kept rotating and thus drives the paper even after the clutch 243 has finished rotating.

When the electromagnet ΕΔ (Fig. 7) is energized, the pull rod 242 also releases the pawl 245 which locks the clutch 246, causing the cam to rotate by means of the gears 245 and 248 (connected to the clutch). This cam has two tracks "One is to hold the pawl 245 back during two revolutions so that the clutch 246 is only locked after three full revolutions" Since the transmission ratio of the gears 247 and 248 is 1 i 3, this corresponds to a full one Revolution of the cam 249. Two levers 250, 251 run on the other path and are connected to the axes which carry the levers 216 and 215, respectively. Their control function is described below. The transmission of movement to the parts shown in FIG. 7 is effected by a known transmission system which connects the parts via gears and belts.

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When the trailing edge of the original leaves the roller pair 221 (Fig. 2 Ms), it first releases the lever 216, which, like the microswitch M 3, can be reset. To this Thus, the electromagnet EA is released and the electromagnet ET is excited, which causes the movement of the on the copy paper acting cutting knife controls. The electromagnet ET is de-energized when the lever 215 and the microswitch M 4 are also reset are. The actuation and the backward path of the cutting knife have already been described above.

The function of the cam 249 for the cutting process is to prevent the original from controlling the levers 216 and 215 by its edge which contacts the levers 250 and 251, and thus to prevent the cutting process from determining a copy sheet length which shorter than the maximum distance between the feed rollers (in this special case the rollers upstream and downstream of the developer container): ie to prevent the copy from being cut off too short and getting stuck in the container. Furthermore, the edge is shaped so that the microswitches M 3 and M 4 can be reset in accordance with the aforementioned sequence and that the copy sheet is cut off so that it is slightly longer than the aforementioned distance. All of these features are important when the originals to be reproduced are shorter than the above-mentioned critical distance between the feed rollers.

Another safety feature of the cutting system is formed by a device (Fig. 6) that under all circumstances ensures that the copy paper is cut to a given length, e.g. 500 mm, if there is no cutting beforehand. gang has taken place. Usually this device takes effect:

a) if as a result of a failure of the microswitch or a

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other random events lack the signal that the Cutting past the end of the original concerns;

b) if the length of the original is greater than that intended Is worth.

The reasons for which the mentioned device is installed, in case a) unwinding from the supply roll as a result of the first random error must be prevented, in case b) damage to the copy sheet must be avoided, as this would be dangerous for him Tension would be achieved if a certain length was exceeded after incorporation of the slack in the developer because it is pulled by the nip rollers at a speed higher than that of the feed rollers, which are arranged at the previous point.

The aforementioned device provides a rubber roller 263 which is mounted on the lower axis of the roller pair 223 and contacts the disc 264, which is free with each feed cycle is rotatably mounted on the pin 265. The disk 264 is set to a fixed position by a zero spring 266 on each cycle Position reset. The cam 267 performs a full revolution with each paper feed cycle, it is with the gear 248 connected. The cam adjusts the lever 268 during its initial rotation, the extension 271 of which counteracts the lever 270 the action of the return spring 272 pivots about its bearing 271. This adjustment moves the disc 264 from the Scroll and cause it to be reset, starting from the position previously reached.

After one revolution of the cam 267, the disc 264 begins to rotate from its rest position, whereby it is driven frictionally by the rubber roller 263. After about one full revolution of the disk 264 according to FIG maximum copy sheet length leaves an incision at the edge of the

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Disc pivot the lever 270 running on it, and the arm 273 adjusts the projection 27 ^ · of the stop lever of the loading ' movable cutting knife and thus determines the copy sheet cutting process. ' In contrast, if the copy sheet in If the result is shorter than the maximum length, the disc stops in the position corresponding to the length of the copy sheet. the Rotation of the cam 267 during the following feed cycle brings the disc 264 to zero.

The device indicating the end of the supply roll (FIG. 3) indicates by an acoustic signal that the supply roll is over and at the same time switches off the electrical circuit, so that the accidental introduction of an original in the copier the feeding and paper cutting devices unaffected. The device mentioned consists of a sensing element 224, which is mounted on the freely movable Axis 276 is attached. At one end part of the axle 276 a cam 277 is attached, against which a pin of the lever is present. When the supply roll is not used up, the sensing member 224 is pressed against it under the action of the spring 279. On the contrary, when the supply roll is nearly exhausted, the sensing member 224 follows its path and contacts the one on the back of the supply roll lying point 280. As long as the remainder of the roll by the weight of the supply roll core 218 'against the point 281 of the support roller 220 is pressed, the sensor element controlling the cam 277 holds the lever 278 in the initial position. If the the last piece of paper not stuck to the core of the supply roll is moved beyond point 280, the sensing element guides 224 a further pivoting movement along the cam 277 under the action of the spring 279. At this stage is the pin of the lever 278 to the lower part of the cam 277

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opposite. At the point 282 of the lever 278, the hammer 283 is mounted, which is acted upon by the spring 284, what the Approach 285 of the lever 278 can pivot so that the microswitch 286 (M 3 and M 4) are blocked and so their control by the original is prevented. At the same time the hammer 283 is lowered and into the path of the constantly revolving Hammers 287 brought. The hammer will thus receive a blow and in turn the bell 288 under its inertia hit, which is an acoustic signal.

During the opening of the movable part 201 of the lid this part controls the cam 292 by means of the pull rod 289, which is connected to the slide 290 provided with the fixed pin 291 is connected so that a backward displacement of the sensing member 224 and its lifting from the supply roll during the supply roll insertion and replacement process is caused.

The cut copy paper travels through the load Sj, exposure and development stations which are located in the are described individually in IT-PS 873 185 and shown in Fig. 2, When the pinch rollers 25, 27 pass through are, the electrographic copy is moved between the guides 252, 253 in front of the tangential fan 254 (Figures 2-11). The latter, together with rollers 255 and 256, has the task of making the copy before it leaves the copier to dry. The copy is then moved between rollers 257 and 258 to level with drawer 210 to be dropped. The fan 254 blows a stream of air onto the exit surface of the copy, particularly underneath the copy to complete its drying and a direct contact between the one in motion and the one already to prevent a copy from falling into the drawer 210. The pen

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del 260, which swings around axis 261, has the task of creating the The rear edge surface of the copy that has already been dropped should be held down in the direction of the drawer 210 and the correct one To ensure passage of the front surface of the following arch »

The drawer 210 can be in the direction of the front side of the copier are pulled out, sliding below the bottom thereof so that they are copies of different Format is able to accommodate.

A suitable slider 342 on the left side of the Level 205 of the device is arranged, determines in its one position the disengagement of the movement of the supply roll 218, when the slider 342 is in this position it locks levers 215 'and 216' of the microswitches M 4 and M 3 and prevents these levers from being controlled by levers 215 and 216. The slider 342 is adjusted in its other position a part 344 which prevents insertion of the copy sheet into the slot 207 by hand.

According to a preferred embodiment of the copying device, there is an automatic device at the development station (Fig. 9) intended for the addition of concentrated developer, which determines the concentration of the liquid developer in the corresponding container by automatically supplying a fixed amount of concentrate after a predetermined number of Should keep copying processes constant.

This device comprises a cartridge 293, a cartridge carrier 294, a piston 295 and a handlebar 240 which controls the collet.

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ben 295 lowers e.g. after every ten copying processes. When the cartridge 293 is inserted into its seat, the shutter valve 307 opened by pressing on shoulder 308, which causes the concentrate to be dispensed. This then first flows into the chamber 296 and then into the chamber 298 through the channel 297. When the liquid level rises the valve channel closes, the concentrate delivery stops at a level that is automatically restored each time the liquid is discharged from the chamber 296.

The slide 240 performs a reciprocating movement with each copying process starting from its reset position Position, the slide is first moved to the right and lets its shoulder 299 press against the shoulder 300 of the lever 301, the adjustment of the latter and of the bracket 302 is thus able to move the piston 295. Since the lever 301 is on the cam 304 rests, the latching of the extension 300 with the extension 299 is only possible with a position of the cam 304, which is a full Rotation, for example after every 10 copying processes, in that it is advanced by the pawl 305 by 1/10 of a revolution with each backward movement of the slide 240. Of the Piston 295 moves a controlled length into chamber 298 in which the liquid is at a constant Has level by allowing a constant amount of liquid to flow over into the channel 310, which they the main container of the developer.

The electric circuit shown in Fig. 11 includes (a) the continuous operations as shown in the drawing with regard to the motor M, the fan V and the warning lamp S when the device is switched on and (b) the periodic actuation

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gen, which apart from the parts of group (a) also 'according to the drawing the components that are only operated when the copy sheet feeding operation is set in motion, include.

Patent claims:

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Claims (1)

-19- Patent application Copier, especially for electrostatic operation, the coordinated stations for the introduction of the original to be copied, for the drive, the feed and the cutting of the copy paper from the supply roll for the electrostatic charging of the copy paper for the illumination of the original, for its output, for the exposure, the development and the output of the copy sheet comprises, characterized by that the supply roll (218) of the copy paper rests on support rollers (220) which are rotatable on axes (221) and is laterally displaceable by displaceable arms (222). 2. Copying device according to claim 1, characterized in that that the two arms (222) connected to it, which are not connected to the supply roll (218) are and 'determine the lateral position of the same, are connected to a mechanism consisting of a loop of string (326), which are connected to the arms (222) diametrically opposite points and on pulleys (328) is movable so that the mechanism maintains the symmetrical position of the supply roll (218) with respect to a given plane the copier and thus secures its centering. 3. Copying device according to claim 2, characterized in that the support rollers (220) extend over the entire width of the supply roll (218). - 20 - 209848/1099 4. Copying device according to claim 1 to 3, characterized in that that of the supply roll (218) peeled copy paper is driven by a pair of rollers (223) which are so formed that they exert the driving effect only on a limited area of the copy paper. 5. Copying device according to claim 1 to 3, characterized characterized in that the supply roll (218) rests on rollers, the position and length of which on contact a limited central area of the supply roll circumference are limited during the drive operation to the performed on both edges of the paper. 6. copying device according to claim 4 and 5, characterized * that the cutting device consists of a movable cutting knife (226) rotating around an axis (227), which is a cylindrical Has cutting surface and a helical cutting edge and in contact with a straight counter-blade (228) works, which is movable about an axis (229) and by means of a spring (233) in contact with the movable cutting knife (226) is held. 7. copying device according to claim 6, characterized in that the axis (227) of the movable Senneid knife (226) and the pivot axis (229) of the counter blade (228) at a small angle to each other are arranged. 8. copying device according to claim 7, characterized in that that the drive system of the movable cutting knife (226) consists of a spring (233) - 21 - 209848/1 099 one end of which bears against a first part (232) > which remains stationary during the cutting movement and the other end of which rests on a second part (234), which in turn rests on a pawl (232) that is released at the time of the cut and the pivoting of the cutting knife (226) under the action of the spring (233) allowed previously by means of a cam (241) and a Lever system (231, 235) was tensioned, which is effective in that it is the first part (232) until it is locked moved by a stop tooth. 9 · Copying device according to claim 8, characterized in that the part (232) connected to the cutting knife (226) during the cutting movement releases the stop tooth that locks the first part (232) against which the cutting spring (233) acts, so that from the part (232), the cutting spring (233) and the cutting knife (226) unit pivotable under the action of a second spring (239) and the cutting knife (226) can be reset. 10 _# copier according to claim 9, characterized in that a cam (267) which is connected to a gear (248) and rotates one full revolution with each paper feed cycle, a disk (264) from the lower roller (223) for the paper feed removed and set to zero by means of a lever system (270) overcoming a return spring (272), the disc (264) executing a full rotation corresponding to the maximum copy sheet length, after which rotation the lever system (270) controls the copy sheet cutting process. - 22 - 209848/1099 * 22, ert. ν copying device according to claim 10, characterized in that a sensing element (224), which has a cam (277) and lever (278) system is connected, is pressed by a spring (279) against the unused supply roll (218) and against the Back of copy paper when the supply roll is almost exhausted is, v / obei the sensing element (224) controlled by the original microswitch (286) is locked and one on the Lever system (278) mounted hammer (283) is lowered until it hits an acoustic signal generating hammer (287) meets. 12, copying device according to claim 11 _# characterized by a device consisting of a cartridge (293) containing a concentrated developer ^ replenishing liquid, which is provided with a valve (307) which can be opened by contact, a cartridge carrier (294) and a piston (295) which is periodically lowered by a lever-cam gear (304, 301) and which delivers a constant amount of liquid from a chamber (298) into the main developer container (70). 13 · copying device according to claim 12, characterized characterized in that the centering of the original to be copied in the insertion plane opposite the optical system with two side adjustment parts (206), which are controlled by a slide (208), is effected, with the side adjustment parts (206) by Engaging a rack member (320) thereon - 23 - 09848/109 9 a gear (322) driven by the slide (208) via a cord (324). 14. Copying device according to claim 13 ». characterized, that the supply roll (218) enclosing portion of its housing by a Part (201) of the housing cover (5) is covered, which is around a pin (22) pivotable outwards, thereby directly accessible and furthermore movable as a whole in such a way that it exposes a portion of the path of the copy that runs between the pinch rollers (25, 27) and the output rollers (257, 258). Wb / Pe - 22 991/2 209848/1099