CS198110B2 - Copying machine for copying the sheet as well the book original - Google Patents

Description

BACKGROUND OF THE INVENTION The present invention relates to a photocopying apparatus for copying both a single-page and a book-based original, with a photosensitive environment, with an optical system for projecting an original image onto a photosensitive environment, a transfer environment delivery device, with aids for conveying the transfer environment from the feed device to the outlet, with the mouth ¹ of the delivery station, and with a housing for storing all of the above components.

Traditional copiers are usually classified into two types, one of which can only copy from sheet originals and the other is designed to copy three-dimensional originals such as books and the like.

Apparatus designed solely for copying from slatted originals cannot make copies from books or other similar originals, but they are excellent in that copies can be quickly made from sheet originals simply by inserting them into the insertion slot and there is no back feed for transporting originals or optical system during the actual copying, which increases the copy speed approximately twice. Furthermore, these photocopiers have the advantage of simplicity and low cost of overall construction, as well as readiness and ease of installation with an automatic document feeder, if required.

The second type of photocopier intended for copying books and other thicker originals has the advantage of being able to copy both from sheet originals and from book originals, but their construction is such that each original to be copied must be evenly spaced on the original carrier, and such constructions inevitably lead to cumbersome manipulations when lifting the original holding lid for placement. Each original on the original carrier, when closing the holding lid and pressing the copier button, if desired, copying thicker originals. In addition, the original carrier or optical system effectively includes its reverse movement, which means a corresponding loss of time and accordingly a corresponding reduction in copying speed for the same procedure. In addition, they are not only mechanically complicated and costly, but are very difficult to supplement with the automatic document feeder.

In most institutions, however, the requirement for copies of sheet originals is greater than for ko198110 pie originals. For this reason, these institutions had to use photocopiers for book originals that are more expensive and less convenient for. copying from leaf originals.

To eliminate such wastage, therefore, copiers have been proposed that are capable of copying from book originals, while retaining the benefits of sheet-copying machines. Such devices are classified into the following two types:

I. In the first type, the portion of the apparatus lying above the sheet-original path is designed to be detachably constructed so that when copying book originals, this portion may be separated from the apparatus and the sheet-roller transport rollers are exposed. The book original can be manually placed on such exposed rollers and transported with rubber rollers to be subjected to a slot exposure.

II. The second type is substantially identical in construction to the first type except that it is additionally provided with a carrier comprising a transport plate of glass or plastic onto which the original can be placed and transported for exposure, the edges of the carrier being held by two or more pairs of conveyor rollers.

These two types of machines are essentially similar to photocopiers, for sheet originals in construction and accordingly in price, but have the following disadvantages:

From the user's point of view, removing a part of the machine is a cumbersome procedure and would also cause difficulties in securing the storage. space for this section if the space available to the user is limited. The same applies to the second type described above.

Furthermore, in the case of the first type, the variable manual pressure exerted on the original can cause a large variation in the load of the machine drive. In the second type, the thickness of the carrier may cause corresponding changes in optical path length, which in turn would result in erroneous focusing, and accordingly. incorrect synchronization, which would seriously affect the quality of the resulting copies.

Gear. placed on the conveyor rollers for the original to drive them, and further on the second type, the conveyor rollers will protrude beyond the path of the originals and thus this path will not be straight and part of the book original will not be copied.

Furthermore, when the original to be copied is of considerable thickness, such as a book, and the leading edge of the original, taken in the direction of its movement, has a complicated shape (e.g. due to the open position of the book), the front edge position of the resulting copy may vary widely, because the input edge of the book or below. it is scanned by a detector designed for. scanning the front edges of leaf originals.

This implies that copiers of the above types are virtually unsatisfactory for the purpose.

The invention overcomes all the above disadvantages and means improvements in many components of the copier.

The main purpose of the invention is to provide a copying machine which can fully function both for copying from sheet originals and for copying. copying book originals and can also increase copy speed according to different copy sizes.

The invention is based on the aforementioned apparatus for copying both a leaf and a book original, with a photosensitive environment, with an optical system for projecting an image of the original onto a photosensitive environment, with means for producing an image on a photosensitive environment, with a developing device, for supplying the transfer environment, with aids for transporting the transfer environment from the feed device to the outlet, with a fixing station and with a housing for storing all of the above components; The invention is based on the fact that the carrier of the book original is reciprocally movable and integral with the sheet-metal conveyor, and that a drive mechanism is common to the carrier of the book-sheet and the sheet-metal conveyor, as well as a blocking device preventing the carrier. of a book original when the conveyor of the leaf original is driven to copy that Original.

According to a preferred embodiment of the invention, the book-original carrier is movable to a first position for engaging a drive for transporting a book original, as well as to a second position for engaging a conveyor for transporting a sheet original.

According to a further embodiment of the invention, the housing has fixed rails or rails. The original document carrier movable along its length and opposite each other in a vertical direction, wherein the case and the document carrier are interconnected and define two sets of adjacent spaces separated by partitions, one set of spaces comprising horizontal and vertical rollers with retaining to limit the freedom of horizontal and vertical movement of the case and the book original carrier, and the second row of spaces includes vertical rollers with retainers to limit the freedom of vertical movement of the case and the book original carrier.

The horizontal and vertical rollers with retainers in one of the spaces of one set and the vertical rollers with retainers in one of the spaces of the other set preferably consist of flexible rollers larger than the predetermined dimensions of these spaces in directions to restrict freedom of movement.

According to another embodiment, the fixed and movable rails are formed by an extruded light alloy piece and the horizontal and vertical rollers are made of synthetic resin.

The copier of the invention is of the liquid developing and transfer type, which can selectively copy sheet-like originals, such as documents and the like, or book-like originals, such as books and the like. as required.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an oblique projection showing one embodiment of a copier according to the invention; FIG. 2 is a longitudinal section through the apparatus; FIG. 3 is a rear view of the embodiment of FIG. 2; Fig. 4 is a partial oblique view showing the mechanism for stabilizing the original carrier; Fig. 5 is a cross-sectional view of the apparatus; oblique projection showing the propulsion system; Fig. 7 is a longitudinal section of the original carrier; Fig. 8 is a partial top view of the original carrier; Fig. 9 is a partial cross-sectional view of the guide of the book carrier; Figs. 10 and 11 are oblique projections showing guide rollers for the book carrier; movement of traditional carriers of the original, eg. ' Fig. 14 is a cross-sectional view showing one embodiment of a guide according to the invention; Figs. 15 and 16 are oblique views of rollers for such a guide; Figs. 17 and 18 are oblique projections showing another embodiment of stopper rollers; Fig. 19 is an electrical diagram. Fig. 20 is a timing diagram for various switches in the same circuit; Fig. 21 shows a paper feeder according to the invention; Fig. 22 is a front view showing one embodiment of a paper feeder; Fig. 23 is a side view 12 is a front view of the paper feeder control mechanism of FIG. 23 and 28; FIGS. 25 to 27 are front views of the alignment control mechanism; FIG. 23 and 28, FIG. 28 is a side view taken along line B-B of FIG. 22, FIGS. 29 to 32 are perspective views of the levers, FIG. 33 is a perspective view of the friction roller, and FIG. 34 is a longitudinal cross-sectional view of the drying and fixing apparatus with the top and bottom open.

FIG. 1 shows one embodiment of a copier according to the invention, comprising a housing 1, a sheet-original conveyor 2, a book-original carrier 3 covered with an original holding lid 4. The apparatus further comprises a pair of guide rails 5i and 5j for the original carrier 3, a cassette 6 comprising a supply of transfer paper sheets P therein and a cassette lid 7 which can also serve as a tray for storing sheets of paper ejected from the apparatus after image transmission. Also seen there is an auxiliary tray 8, an operating portion 9 comprising a master switch 10, a group of alarm bulbs 111 to 114, a switch 12 for re-lighting the bulbs to be described below, a button 13 for switching operation modes between sheet copy mode and copy mode book button, 14 button to select the continuous copy mode from the book original, button 15 to stop the permanent copy of the book original, and the scale 16 to adjust the density of the desired copies.

First, the operation of such a copying apparatus of FIG. 2 will be described in an example where it is necessary to copy from sheet originals. The sheet original is inserted from the right into the machine, into the press between the rollers I81 and I82 of the sheet-feed conveyor 2 which rotate synchronously with the photosensitive roller 17, which normally rotates after a certain start-up time has elapsed, as described below; then the loaded original is transported to the left. Once the incoming edge of the leaf original is detected by the bulb 19 and the light sensing element 20, the rollers I81 and I82 stop temporarily, and so the original also stops. Then, when the photosensitive drum 17 reaches a predetermined position, a start signal is given to re-rotate the rollers I81 and I82 so that the original is further conveyed to the left synchronously, rotating the photosensitive drum 17, and then unloaded upward by the rollers 21i and During this time, the original is illuminated from below by four bulbs 24, at the illumination spot 22 as it moves over the glass plate 23. The image of the original is optically focused by means of a mirror 25 and a mirror lens 26 through the exposure station 27 to the photosensitive drum surface 17; this creates an image on it.

The photosensitive cylinder 17 comprises a photosensitive layer coated with a translucent dielectric layer and rotates normally clockwise as shown in FIG. 2. The photosensitive cylinder 17 is first charged to positive polarity using a primary charger 29, powered by a high voltage positive polarity high voltage sources 28. When the charged portion of the photosensitive drum surface 17 reaches the exposure station 27, the image from the lighting station is projected onto that portion of the photosensitive drum 17 through the slot while being discharged by an AC discharger 30, powered by a high AC voltage from the high voltage source 28. Thereafter, this portion of the photosensitive drum surface 17 is subjected to total exposure by means of a bulb 31, thereby forming an electrostatic latent image on a portion of its surface, after which the portion of the photosensitive drum surface 17 carrying the image enters the developing device 32. for storing a certain amount of developing liquid 33, a pump 33, see FIG. 5, for stirring and lifting the developing liquid and an electrode 36 normally biased against the photosensitive cylinder 17 by a spring 37 so as to maintain a slight gap therebetween and the photosensitive cylinder surface 17. The electrostatic latent image formed on the photosensitive drum 17 is developed into a visible image by the particles of colourant contained in the developing liquid and collected on the electrode 36 by the pump 33.

Then, at the rear charger 38, the portion of the photosensitive drum surface 17 carrying the image is charged with negative high voltage from the high voltage source to remove excess liquid from the surface of the photosensitive drum 17 without disturbing the induced image thereon. Then, one sheet of transfer paper P from the paper tray is brought into close contact with the surface of the photosensitive drum 17 carrying the image so that the image from the photosensitive cylinder 17 is transferred to the sheet of transfer paper P using a positive high voltage connected to it in the transfer charger from the source. 28 voltage. After the image is transferred, the transfer paper P is separated from the photosensitive drum 17 by means of a separating strip and then fed to the drying and fixing station 41. The photosensitive roller 17 is cleaned by the edge 42i of the lip cleaner 42, pressed d, in contact with the photosensitive roller 17 to remove any residual amount of liquid with the dye, thereby preparing for the next copying cycle. The developing fluid, after being removed from the photosensitive cylinder 17 by means of the blade cleaner 42, flows along the grooves 17i formed around the opposite ends of the photosensitive cylinder 17 and from there to the developing device 32 for reuse.

. The sheets of transfer paper P are contained in a cassette 6 which is detachably mounted with a cassette rail mounted in a cassette withdrawal rail. According to the invention, different types of cassettes with different dimensions of the transfer sheet can be used and can be easily exchanged as required. The sheets of transfer paper P are supported by the inner plate 43 inside the cassette 6 and the inner plate 43 is biased upward so that it normally pushes the transfer paper P against the separating tabs 43 formed at the front end of the cassette on their opposite sides. By appropriately selecting the elastic spring constant 44, the compressive force by which the sheets of transfer paper P are pressed against the separation pawl 43 can be kept substantially constant, regardless of the number of sheets of transfer paper P in the cassette 8.

When the photosensitive roller reaches its predetermined position, the signal for triggering the normally rotating paper feed roller 46 comes into contact with the top sheet of transfer paper P, so that the paper feed roller 46 engages the separator latch 45 to separate the top sheet of transfer paper P from the others. However, since the alignment rollers 47i and 472 located next to the cartridge stop immediately upon lowering the feed roller 46, the transfer paper P fed from the cartridge 6 tends to be unstretched between guides 48i and 482, the front edge of which is supported by the surface four. between the alignment rollers

471 and 472. Immediately thereafter, the photosensitive roller 17 generates a paper feed signal on which the pulse rollers 47i,

472 begin to rotate to deliver the transfer paper P at a rate equal to the peripheral speed of the photosensitive drum 17. On the other hand, the paper feed roller 46 is lifted again from the transfer paper column P after a preset time, and then the separated transfer paper is continuously fed only by alignment rollers 47i and 472 and subsequent feed means.

The transfer paper separation web 40 may be in the form of a narrow continuous web that extends from the separation roller 49, located very close to the photosensitive roller 17 and via the deflection pulley 50, pulleys S2i, 52.2, deflection pulley 51, pulley 523 back to the separation roller

49. A portion of the separator belt 40 between the roller 523 and the separator roller 49 is supported on the photosensitive roller 17 in a portion thereof corresponding to one end of the transfer paper sheet, and a portion of the separator belt 40 between the rollers 52i and 522 is deflecting dumps

50, 51 is forced to follow a path deviated from the transfer paper path. The separator belt 40 is driven by the separator roller 49 at a rate substantially equal to the photosensitive vacuum speed 17. Part of the separator belt 40 is sandwiched between one side edge of the transfer paper sheet P and the outer surface of the photosensitive roller 17 when the transfer paper P comes into close contact with the photosensitive roller. 17 during image transmission. Thus, the separation of the separating strip 40 from the photosensitive roller 17 performed at the separating roller 49 will push one side edge of the transfer paper sheet P to also detach from the photosensitive roller 17. Once its side edge has been so separated, the transfer paper can P can be completely separated from the photosensitive cylinder 17 due to its own self-supporting strength and the operation of the air driven by the blower 53, see FIG. 3, via the duct 54 and the air outlet 55i, whereupon the transfer paper can be directed towards the drying and settling station 41.

In the drying and settling station 41, the unsteady transfer paper P is conveyed on the conveyor belt 57, driven by the roller 56 in the left direction, as shown in Fig. 2, so that the paper P is dried and fixed by air flow from the duct 54 and intensively. it heats directly under the heater 58, the bulk of the air thus heated by the heater 58,

8 110 consumed for drying is sucked into the blower 53, see FIG. 3, through a supply duct 59 located below the belt 57 so that this air can be recirculated for reuse for drying and fixing. The transfer paper P thus dried and stabilized can be electrically discharged by the discharger 80, so that any residual charge 13 of the surface of the paper P is removed, then passed through the outlet roller 61 to the outlet channel 82 and discharged onto the lid 7 of the cassette 6 4, the operation of the above-described apparatus when used for copying book originals will now be described. Switching the operation from the above-described copy-side copy mode to the copy-side copy mode can be performed as described below. • First, the toggle button 13 is depressed to cause the lever 63 to rotate? counterclockwise around the pin 63s by cooperating between the lever 13i and the protrusion B3i, which is integral with the lever 632, thereby lowering the roller 83 and sliding out of engagement from the leaf original reservoir 85 formed at one end of the cam 84 mounted on the bottom of the original carrier 3, which can thus move to the left, as shown in Fig. 2, until the roller 83 is inserted into the book original groove 66. This movement of the original carrier 3 from its leaf-original position to the book-original position interrupts the power supply to the electrical drive of the leaf-original conveyor 2 so that the entire circuit is switched to the copy-original position. In this operating position, the front end of the book original to be copied, i.e. the front end 67i of the glass plate 67 of the original carrier 3, see Fig. 2, occupies the position occupied by the bulb 19 and the light receiving element 20 in leaf copying mode. original.

The book original to be copied is placed on the glass plate 87 of the carrier 3, the front end of which is aligned with the front end 67i of the glass plate 9, then the book original is held by the retaining lid 4, see Fig. 2. button 14 '(FIG. 1), and a start signal is output from the photosensitive drum 17 in the same manner as described for copying sheet originals. This signal excites the electromagnetic plunger SL3, so that when the roller 63 is removed from the groove 66, the book original carrier 3 moves to the left, as shown in FIG. 2, at the same speed as the peripheral speed of the photosensitive roller 17 to effect exposure through the slot. Upon completion of this exposure, the book carrier 3 stops its movement to the left in response to its own signal corresponding to the size of the book original, after which the book carrier 3 begins to move back or to the right. This reverse motion speed is higher than the forward speed to increase copying efficiency. After returning the carrier from the book original to its initial position for copying the book original, the drive of the book original carrier 3 is stopped, whereby the roller 63 is inserted into the groove 68.

When multiple copies need to be continuously produced from the same book original, this can easily be accomplished using a counter 14 operatively connected to the copy button 14. The counter 14 converts the movement of the book original carrier 3 into numbers by the cam 64 and the knuckle 69 shown in FIG. 4 by keeping the copy button 14 stlač in the depressed position until the predetermined number of copies is counted, thereby allowing multiple copying.

In other respects, the operation of the copying machine for the originals is identical to the operation for the sheet originals.

In this embodiment of the copier, the photosensitive drum 17 can copy originals of different widths up to A3 and its peripheral length is somewhat greater than the length of A3. Therefore, when copying from sheet-like originals, one of the A3-size originals can be placed for copying with the entire revolution of the photosensitive drum 17, or two Ai-size originals can be loaded simultaneously in a direction perpendicular to its longitudinal axis. When copying book originals, the forward stroke, that is, the exposure stroke of the book original carrier 3, is followed by a back stroke that basically requires as much time as the forward stroke and hence the time required to make one copy of the original is approximately twice the time required for a single copy. leaf original. For example, for A3 originals, one copy can be made every two full revolutions of the photosensitive drum 17, and for A4 originals, one copy can be made for full revolutions of the photosensitive drum 17.

This difference in cycles, which results from different paper sizes, can be detected by a signal from the cassette 6, and the difference in cycles resulting from different types of originals can be detected by a signal resulting from a change in the position of the book original carrier 3.

The start preparation that precedes the normal copy cycle and the rest position and restart following the completion of one copy cycle will now be described. As described above, the copier according to this embodiment is of the liquid developing type in which the coloring particles in the developing liquid are fixed by evaporation and drying of the carrier liquid. In addition, a blade cleaner 42, which may be formed from an elastomer, such as urethane rubber, nitride rubber, fluorine rubber, polysulfide rubber, acrylic rubber, or the like, is used to clean the photosensitive drum 17 to remove dye or develop. The liquid remaining on it after image transfer usually tends to allow the formation of very small amounts of dye near the edge of the cleaner. If the instrument stops and then is left in such conditions for several hours, the carrier accumulated on the edge would evaporate and the dye would harden. If the device is restarted so that the roller 17 rotates under such conditions, the solidified dye would damage the edge of the cleaner 42 and / or the surface of the photosensitive roller 17, or could adversely affect image formation, on the roller surface. For this reason, the copier according to this embodiment is arranged such that the connection of the master switch 10 does not rotate the photosensitive cylinder 17, but only allows the pump to be rotated in the developing device 32, Fig. 5, to agitate and introduce the developing liquid 33 upwards. 2 to pour onto the blade cleaner 42. When the solidified dye at the edge of the cleaner and in its vicinity liquefies at a predetermined time, the photosensitive drum 17 begins to rotate and the liquefied dye is wiped off. When the photosensitive roller 17 performs at least half a turn, the rollers 18i and 18 of the sheet-feed conveyor 2 begin to rotate and allow a copy cycle.

If the power supply were left connected after the end of the copy cycle, the photosensitive roller 17 would continue to rotate, and this is not desirable with respect to the life of the photosensitive roller 17 and / or the blade cleaner 42. arranged so that when no further copy cycle is required after the previous one, the photosensitive drum 17 can automatically stop to the rest position regardless of the on position of the master switch 10. The time counted for such rest position is selected longer than the time necessary for a sheet of transfer paper P on which a copy of the image is to be removed from the device and for cleaning the entire surface of the photosensitive drum 17. In such a rest position, by pressing the switch 12 for. restarting in the operating part 9 returns all parts of the apparatus to the position they were in before the rest position.

‘In an electrophotographic copier that uses a roller-image transfer system, various process elements are placed around the entire photosensitive circuit. rollers 17. On the other hand, the photosensitive roller and the elements surrounding the rollers must allow easy removal and inspection for maintenance. Further, the photosensitive roller 17 should include temperature control mechanisms therein to prevent the surface of the roller from becoming clogged.

The purpose of this roller is also to satisfy these requirements and to create them on a support device for a photosensitive roller which is simple to design and maintain and has a compact design.

Two types of support devices for a photosensitive cylinder are known. One is that the opposite ends of the cylinder shaft are supported by support frame plates that can be inserted downwardly into the housing of the copier. With such a design, however, removing the photosensitive cylinder, which sometimes needs to be performed, as mentioned above, would require approximately as much work as is necessary to completely disassemble the device, and in addition, the dimensions of the device would be so large and hence costly that the the process could not be placed above the cylinder.

In view of these disadvantages, a support device of the type previously proposed has been proposed in which one end of the cylinder shaft is fixed in the frame of the machine housing and the photosensitive cylinder shaft is driven so that the cylinder can be mounted on the shaft detachably. This second type greatly eliminated the drawbacks typical of the first type, but still had the drawback that the rotating shaft carried in a fixed manner led to an increase in the dimensions of the support portion which are not suitable for forming a compact apparatus. Moreover, both of these types would encounter difficulties in mounting the temperature control device.

The support device for the photosensitive cylinder 17 of the present invention eliminates the above problems. One embodiment thereof is shown in Figure 5, in which the front arch frame 71 and rear alloy frame 72 are mounted to a bottom plate 74 of the copier, the rear frame 72 having a protrusion into which the cylinder shaft 73 is inserted.

The roller unit consists of a photosensitive cylinder 17 which comprises a metal cylindrical member, a photosensitive layer formed on the outer peripheral surface of the cylindrical member and, if desired, a transparent high-resistance resin layer that covers the photosensitive layer surface. The photosensitive cylinder 17 is disposed between the front and rear flanges 84i and 842, the integral bearing portions of which are connected, for example, by three rods 86. Between the bearing portions is a tube 85. The bearing 762 is held by the bearing portion. All these members together form a cylindrical unit.

For pushing the bearing 762 to the left, as shown in FIG. 5, a pressure retaining member 82 is provided that is axially movable. The retaining member 82 is externally provided with a support flange 80. A pressure coil spring 83 is interposed between the retaining member 82 and the support flange 80. The support flange 80 is mounted on the support plate 79. These members together form a front support mechanism.

The bearings 75 and 76i are supported on the protrusion of the rear frame 72 and held by the bearing housing. The bearing 76i is provided with a non-slip 198110 replacement member 78 attached to the fixed shaft 73 by bolts. The gear 77 is mounted in the bearing housing and has a clutch pin 87.

The assembly may be performed as described below. The front cover of the device housing 1 is opened, whereupon the cylindrical unit is inserted onto the shaft 73 through the arched space of the front frame 71 with the support and the pipe 85 as a guide so that the connecting pin 87 is inserted into the connecting hole 88 in flange 842. with the gear 77 of the cylinder.

The removal of the cylinder unit from the shaft 73 can be performed in the reverse order. During assembly, the coil spring 83 biases the cylindrical unit toward the rear frame 72 via the retaining member 82, the bearing 762, the support portion 843 and the front flange 84i, thereby avoiding any clearance between the parts. The coil spring 83 also detects vibrations or shocks that could occur during transport of the assembly.

Thus, the photosensitive cylinder support device has the following advantages according to the invention: The use of an interlocking shaft for the assembly and disassembly of the cylinder unit allows a compact design of the entire apparatus. The cylindrical unit, which is axially movable for assembly and disassembly, allows the placement of all process elements around the entire circumference of the photosensitive cylinder and allows perfect operation. The cylinder shaft attached to the apparatus body makes it easy to incorporate a heater a and a temperature sensor b, thereby making it easy to create a control device for stabilizing the copying process. The fact that the rear bearing of the drum unit is attached to the fixed shaft allows for easy assembly and disassembly of the drum unit.

As shown in Fig. Θ, the gear 77 of the photosensitive cylinder 17 is provided with a cam 157 for actuating the MSI and MS4 switches to generate a start signal, a cam 158 for actuating the MS2 and MS5 switches to produce a paper feed and alignment signal 159 to control the MS81 and MS80 switches to generate a jam sensing signal, and the cam 160 to control the MS7 switch to generate a cylinder stop signal. The cam 160 is intended to determine a predetermined rest position for the cylinder 17 and the portion of the cylinder to be impregnated by the cleaning blade during its rest position. This embodiment of the invention is designed such that the impregnated portion of the cylinder is not to be used as a surface to form an image.

^The front and rear stationary rails 5i and 52 are attached to the upper ends of the frames 71 and 72, so as to slidably support the book original carrier 3 by means of rollers to be described.

The carrier 3 of the book original consists of a part for copying the book originals and a conveying device of 2 originals. The leaf original conveyor 2 is provided with a gear 89 at one end thereof, as shown in FIG. 3, and the gear is driven by a drive source in the body of the device.

7 and 8, the gear drive 89 can be transmitted by a synchronous pulley 90 coaxial to the toothed wheel 89, a synchronous belt 91 and a synchronous pulley 92 to the roller 21i, and simultaneously transmitted via the synchronous pulley 93 to the synchronous pulley 94, which is transmitted to the roller 18i under the control of the CLI clutch.

^{1, a} working connection will now be described according to FIGS. 3 and 6. The drive from the main motor M1 is transmitted via a sprocket 96, a chain 95, a chain kojo. The chain 93 also drives the sprockets 99 and 100 rotatably mounted on the shafts of the electromagnetic clutches CL2 and CL3. Behind the clutches CL2 and CL3, sprockets 101 and 102 of different numbers of teeth are mounted on their shafts and the two sprockets are connected together by a chain 103. To the other end of the clutch CL2 is attached a roller 104 on which wire 105 is wound. several turns. The wire 105 extends crosswise therefrom around the pulley 106, and the needle-end ends are secured to opposite ends of the angle 1072, see FIG. 1, which forms part of the carrier 3 of the book original. The book carrier 3 can be reciprocated by switching two clutches CL2 and CL3 to rotate the cylinder 104 in the normal and in the opposite direction.

One end of the coupling shaft 97 carries a gear 108 that engages the aforementioned gear 77 of the cylinder 17 so that the drive is transmitted from the engine to the gear 77 of the cylinder 17. Between the gear 77 of the cylinder 17 and the gear 89 of the original carrier is a series of transmission gears 109, 110, 111 for transmitting the drive. When copying the sheet originals, the gears 89 and 111 are engaged, as shown, but when copying the book originals, the book original carrier 3 is shifted to interrupt this engagement. Another gear 116 engages the gear 77 of the roller for driving the separating roller 49, which in turn drives the conveyor belt 57 through the sprocket 117, the chain 118, the sprocket 119 and the drive roller 56.

At the other end of the transmission shaft 97, a sprocket 112 is provided for transmitting the drive through the chain 113 and a sprocket 114 on the paper feeding apparatus 115.

With the paper feed control device 115 (FIG. 6), the paper feed roller 46 (Fig. 2) is lowered to begin feeding the paper in response to the paper feed signal. As the previous sheet of transfer paper passes around the alignment roller 47i, this roller stops temporarily. In the following, the front edge of the next sheet of transfer paper, which is now fed, hits the roller 47i and forms a loop. When the paper feed signal disappears, the alignment roller 47i continues to rotate to feed the transfer paper, and the paper feed roller 46 is raised to its initial position. These operations are regulated electrically and mechanically.

í The following two types of original document holder and guide equipment may be present in copiers with a reciprocating original document carrier.

As shown in Fig. 12, the body and the device is provided with a pair of rails b, bi, such as round bars, so that one rail b carries a roller c with a V-shaped groove and the other rail bi carries a flat roller d, are attached to the original carrier. This design may be most advantageous and ideal, except that the pair of rails b, b1 must be long enough to extend over the entire reciprocating range of the carrier e, which places great constraints on realizing the compact design of the apparatus.

As shown in Fig. 13, the V-groove rail f and the flat rail g, both substantially as long as the original carrier e, are provided at the top of the body and apparatus and the original carrier provided with the rails i is < These are placed on the rails fag, interposed between the catching and holding steel balls h. In this case, the original carrier e will protrude beyond the rails f, g of the apparatus body as it moves. Therefore, the structure must be designed so that the device body rails are supported by steel balls j interposed between the rails f, g and i. This structure can be ideally excellent, but oscillations or unclean sliding movement can occur between different parts if the rails and balls do not exact dimensions. This would lead to great manufacturing difficulties and would not be avoided because of the considerable strength or hardness required for the balls and rails to be brought into point contact. disadvantages while maintaining advantages.

FIG. 9 shows one embodiment of a device for receiving and guiding a book carrier 3 according to the invention. The front frame and the rear frame of the copier are indicated by the numbers 71 and 72. The book-carrier 3 formed by the glass plate 67 is guided by fixed guide rails 5i, 52 attached to the frames 71 and 72. The book-carrier 3 further has movable rails 107i and 1872. A, B, C, D spaces are defined between the rails. On the pulley 106 is wound wire for the reciprocating movement of the book original carrier 3.

Within spaces A and B, a plurality of vertical rollers 163 are disposed in bearings in the cage 161 by means of horizontal shafts 162 as shown in FIG. 10. The vertical rollers 163 in space A are formed of a material of relatively high hardness, such as polycarbonate or the like and define the level of the book original carrier 3 relative to the stationary rail 5i. The rollers 163i in space B are formed of a material that is somewhat resilient, such as hard rubber, and are somewhat larger in size than the height of space B so as to avoid any noise from the book-carrier 3 in the vertical direction.

In the remaining compartments C and D, horizontal rollers 165 and vertical rollers 166 are housed in cage bearings 164, Fig. 11. The rollers 165 and 166 in compartment C are made of a material of high rigidity and determine the vertical and horizontal position of the carrier. 3 book original. The rollers 165i and 166i in the space D are formed of a resilient material and dimensionally larger than the vertical and horizontal dimensions of the space D so as to avoid the noise of the carrier in both directions.

The flexible rollers 163i, 165i and 166i are shaped as shown in Figures 15 or 16. In the case of the hollow shape as in Figure 16, these rollers may be formed of the same material as the rollers 163, 165 and 166. about greater rigidity. For this purpose, a material having a high surface hardness and good wear resistance can be selected and the use of such a material will result in an economical use of the material.

According to this embodiment, a return guide is formed consisting of rails 5i, 52 and movable rails 107i, 1072, positioned vertically opposite to each other forwards and towards n, n relative to the device housing 1 and to the booklet return carrier 3 so as to form two sets of horizontally adjacent separate spaces A, B and C, D between the upper and lower rails. One of the two sets of spaces C and D has vertical rollers 165 and horizontal rollers 166 contained therein, limited in the freedom of vertical and horizontal movement by the restraint 164, and the other set of spaces A and B has vertical rollers 163 contained therein, limited in the freedom of vertical movement by the restraint. 161 to form a guide device. The rollers in at least one of the front and rear sets of guide means are flexible rollers sized slightly larger than the dimensions of the spaces in which the rollers are accommodated, so that any possibility of manufacturing error of the members forming the guide is compensated. Thus, the rollers and rails are in direct contact with each other and do not need special strength or hardness. For example, the rollers may be made of plastic and the rails may be made of aluminum alloy by extrusion. Likewise, the flexible rollers can compensate for any manufacturing errors, resulting in a smoothly moving gate mechanism without noise and without the need for high precision. In addition, the harder rollers 183, 165, 166, although dimensionally slightly larger than the dimensions of the spaces in which they are housed, have a certain degree of flexibility and can adapt to these spaces to the extent that no practical disadvantage arises, thereby constituting a large degree accuracy.

Various embodiments of the retainer are shown in Figures 17 and 18. In Figure 17, the retainer 161 holds a plurality of vertical rollers 163 in rectangular slots formed therein, and these rollers are located in the aforementioned compartments A, B. In Fig. 18 the retainer 164 holds a plurality of vertical and horizontal rollers 165, 166 in rectangular slots, and these rollers are located in the aforementioned compartments C, D. Opposite ends captured 161 or 164 are provided with a dustproof member 167 formed of felt or the like so preventing entry foreign particles into roller parts inside the rails.

The cylindrical rollers located in the separate compartments A, B, C, D are in direct contact with the rails, which means so little contact pressure between them that the rollers can be easily formed of economical synthetic resin.

The original holding lid 4 is made of rubber or the like and mounted by hinges 144. The guides 4i, see Fig. 1, to facilitate insertion of the original sheet and the lid handle 42 to facilitate the placement of the book original are formed on the upper surface of the holding lid 4 as a whole. with him. The side edge of the holding lid 4, which is adjacent to the sheet-original entrance, has a tapered portion 154, see FIG. 7, to facilitate the insertion of the sheet-originals.

7 and 8, a connector 149 is located at the bottom of the book carrier 3 and connected to the connector 150 in the body of the device. This connection is broken when it is to be copied from the book original because the book original carrier 3 is slightly shifted in the case described above. Cams 152, 151, 153 are also provided at the bottom of the angle 1072, as shown in FIGS. 5 and 7. Cam 151 engages microswitch MS14, which detects whether the book original carrier 3 is in the copy position from the sheet originals or in the copy position. from the book originals and thus switches the electrical circuit. The cam 152 can engage the microswitch MS12 to stop the book original carrier 3 during movement back during the copy cycle from the book original. The cam 153 can engage microswitches MS10 and MS11 to produce a reverse signal for A4 and A3 formats.

Returning to Fig. 2, it can be seen that the top lid 161 and lid 163 for the drying and fixing device 41 can be opened simultaneously by a hinge 162. When the top lid is opened vertically, almost all18 wells, except for a few elements such as a heater 58, a discharger 60, etc., will be exposed above the conveyor belts 57. Therefore, if any jam occurs in the drying and fixing apparatus 41, the jammed paper can be easily accessed to remove it by opening the top lid. 161.

The main body 166 of the transfer paper transfer device consisting of the conveyor belts 57 is rotatably supported with the separator belt 40 by a shaft 164 and is normally held in a predetermined position by a locking device (not shown). By pressing the handle 165 after opening the top lid 161, the locking device can be released so that the main body 166 can rotate around the shaft 164 in an anti-clockwise direction, thereby opening the entire copy paper path behind the alignment rollers 47i, 472 to allow access thereto. . Therefore, if any jam occurs in this section of the copy paper path, access to the jammed paper can be performed to remove it. In this case, the separation strip 40 is separated from the photosensitive drum 17 so that any jamming of the transfer paper in the separation section can be easily removed.

Partial modifications and other embodiments of the copier according to the invention will now be described in more detail.

Therefore, one embodiment of the paper feeder according to the invention will be described in detail. Referring to FIG. 21, the uppermost sheet P of the copy paper from the bundle P is fed by the paper feed roller 46 and its leading edge is pushed between the alignment rollers 47i, 472 at that time so that the feed sheet forms a loop as this is indicated by the letter P '. Then, the guide rollers 47i, 472 are driven by a signal from the apparatus, thereby timing the feeding of the paper. The operation of the dredging roller and guide rollers was suitably controlled as follows: once the drive of the feed paper rollers 46 is engaged, the drive rollers 47i and 472 are disengaged and stopped. A loop of copy paper P vytvoří is then formed in the foot, whereupon the drive rollers 47i and 472 are engaged and at the same time the drive of the paper feed roller 46 is disconnected. In this way, only two positions are given, that is, the position in which the paper feed roller is stationary while the alignment rollers rotate, and the position in which the paper feed roller rotates while the alignment rollers are stationary. Therefore, the regulation of these positions can. be simply realized by a single switch having one normally open contact and one normally closed contact corresponding to these two positions.

Such a system does not have the advantage that it is not possible to continue the subsequent feeds of the cycle before the leading edge of the leading edge of the previous copy sheet passes through the alignment rollers, but this disadvantage does not lead to any significant drawbacks in the copier of the type using the reversible optical system. provides a time tolerance for the return stroke.

However, if the aforementioned conventional system is applied to a copy machine for sheet originals, where the back stroke is not performed and the originals can be loaded continuously one after another, the paper feeder would be an obstacle to increasing the copying speed.

The present invention also aims to provide a paper feed device that can reduce the time interval between the previous copy sheet and the next copy sheet using a control circuit identical to a conventional system.

Giant. 21 shows one embodiment of such a paper feed device. In this embodiment, the paper feed roller 46 is normally driven to rotate by a drive source in the body of the device. The paper feed roller 46 can be moved vertically by reciprocating movement of the paper feed control shaft 131 through the paper feed lever and the arms 133, 134 so that the paper feed roller 46 can rest on the copy paper stack P by its own weight or by spring action. to occupy the position for driving the paper for feeding the top sheet of paper P * and can be lifted away from the stack of paper P to take a position to stop paper feeding. The alignment rollers 47i, 472 may alternately rotate and stop.

^; As shown in FIG. 22, solenoids SL1 and SL2 are designed to operate the above paper feed roller 46 and alignment rollers 47i, 472. These solenoids can be energized by a single microswitch having one normally open contact and one normally closed contact, that is, they can be excited by a single signal for feeding the paper. When the paper feed signal coincides with the rotation of the photosensitive drum 17, the normally open contact is coupled to excite the solenoid SL1 so that the feed roller 46 is lowered to start the paper feed. At the same time, the normally connected contact opens to de-energize solenoid SL2, but the alignment rollers 47i, 472 are not intended to stop rotation until the leading edge of the previous sheet of copy paper P does not pass through these rollers. Therefore, the rollers 47i, 472 continue to rotate until the previous copy paper has completely passed through them. When the rollers 47i, 472 stop rotation, the leading edge of the next sheet of paper P 'is pushed between the alignment rollers 47i and 47z so that the copy paper sheet P * forms a loop. Then, the signal from the paper is interrupted and energized solenoid SL1 and excites solenoid SL2 so that the alignment rollers 47i, 472 begin to rotate again to begin feeding the copy paper sheet P ', then the paper feed roller 46 is raised to stop its paper drive. Accordingly, timed paper feed cycles can be achieved mechanically.

In Figures 22 and 23, the shaft 120 normally rotates as a drive source for controlling the paper feed through the chain 113 and the sprocket 114. The gear 121 is secured to the shaft. 120 and is provided with a cam 123 attached thereto by a spring clutch 125. The cam 123 rotates the follower 132 by which the shaft 131 to control the paper feed is rotated. The gear drive 121 is also transmitted to a gear 122 that is free from the alignment roller shaft 47i, and the gear 122 rotates the roller 47i via the spring clutch 140. The above-mentioned timed paper feed cycle can be performed by controlling the operation of the spring clutch 140 via time delay mechanism.

When no paper is fed, the SL1, SL2 solenoids are in the idle position and the other in the active position. In this case, the cam 123 rotates the follower 132 clockwise as shown in FIG. 22, and accordingly the shaft 131 and the lever 133, see FIG. 21, are also rotatably driven in the same direction, thereby raising the feed roller. Thus, when the solenoids are idle, the paper feed control lever 128 coupled to the hinge 129 by the pin 129i is pulled by the spring 130 to rotate clockwise about the shaft 128i until it reaches a stop 1282 thereby engaging the end tongue of this lever with a notch 127 formed in the cam flange 123 next to the clutch 125, thereby stopping the cam 123 in this position while moving the small tongue on the peripheral surface of the outer wheel 126 of the spring clutch 125 to disengage the spring and clutch 125, thereby interrupting cam drive 123. To prevent reverse rotation, the Around '121i clutch made integrally with the gear 121, and the inner wheel 123 l coupling made in one piece with a cam 123, a spring 124th

The solenoid SL2 pulls the rod 135 to the right, as seen in Figs. 22 or 25, thereby rotating the pin 135 ‘and the lever 135i in an anti-clockwise direction. This causes the pin 1352 or lever 1353 formed on the lever 135i to move counterclockwise, thereby disengaging the upper end tongue of the lever 1353 with the surface of the delay roller 137i, which is free from the shaft of the alignment roller 47i. In this case, the lever 135 connected to (lever 135s spring 138) also rotates counterclockwise to engage its upper cylindrical tongue into the notch 1373 of the delay roller 137i. Then the alignment roller 47i is driven by the sprockets 121, 122 via the spring and the driven shaft. The retarding roller 137i, which is pushed against the driven shaft by a spring thrust 1377 and a spring 136 attached to the alignment roller shaft 47i and the friction retaining ring 137e slidably mounted thereon, by interaction between the pin 1374 and the groove 1375, is secured against rotation. by engagement between said tongue 1354 and notch 1372.

When the paper feed signal arrives, the SL1 solenoid is energized and the SL2 solenoid is energized by a common switch as mentioned above. Referring to Fig. 24, the linkage 129 and lever 128 are moved to release cam 123 and clutch outer wheel 126, so that the drive from gear 121 is transmitted to the spring 125 and cam 123, which is thus rotated clockwise and causes the roller 132 falls into the selected step 1232 of the cam 123 and rotates counterclockwise, whereupon the paper feed roller 46 travels along the stack of copy paper P to begin feeding the paper.

After the solenoid SL2 is actuated, the lever 135i is pulled back by the spring 139 and the lever 1354 rotates clockwise so that the delay roller 137i is frictionally driven to rotate counterclockwise by the drive shaft 1402. The lever 1353 is pushed against the roller surface by a spring 138. giant.

26.

At the same time, the delay roller 137i rotates about 0-300 ° as shown in Fig. 27, the previous copy sheet passes through the alignment rollers 47i, 472 and the leading edge of the next copy sheet has not yet reached the alignment rollers. At this point in time, the end tongue of the lever 1353 has engaged with another notch 1373 formed in the delay cylinder 137i to prevent rotation of the cylinder 137i while holding the second surface or fine tongues of the outer clutch wheel 140. As a result, the clutch spring is released. to interrupt the drive of the alignment roller 47i.

The leading edge of the copy sheet supplied by the paper feed roller 46 encounters a squeeze between the alignment rollers 47i, 472, which are now stationary, so that the copy sheet forms a loop to perform the time adjustment for copying.

When the paper feed signal disappears, the SL2 solenoid pulls the rod 135 to pull the lever 1353 out of the notch 1373 and thereby release the outer clutch 140 so that the alignment roller 47i rotates and begins to move the paprika sheet.

The solenoid SL1 is then de-energized, but since the lever 128 then travels on the peripheral surface of the cam 123 having a larger diameter than the clutch outer wheel 126, the cam 123 rotates to move the follower 132 to lift the paper feed roller 46, whereupon 24, the notch 127 engages the lever 128 and recalls the position of FIG. 24 in which the follower 123 is stopped.

The delay roller 137i stops in the position of FIG. 25 in which its notch 1372 engages the lever 1354 a) and is thus ready for the next cycle.

In the embodiment described above, the paper feed roller 46 moves vertically to control the paper feed, but possibly control may be performed by occasionally rotating the paper feed roller while always resting it on a stack of copy paper. In the latter case, the follower 123 may be replaced by a gear for rotating and stopping the shaft of the paper feed roller 46.

^! In the apparatus in which the carrier of the original or optical system for exposure through the slit is reciprocated, the paper feeding signal may be formed by such a return member.

In doing so, a single signal source or single drive source is used to perform a cycle of operations consisting of starting the paper feed by the paper feed roller 46, stopping feeding the previous copy sheet through the alignment rollers 47i, 472 and stopping these rollers, feeding the next copy sheet, until its front edge reaches the alignment rollers to form a loop, to start feeding the paper with the alignment rollers, and stop rotating the paper feed rollers.

To accomplish this, a transmission system extending from the drive source 114, 120 through the clutch 125 to the tracking 123 controlling the paper feed and a transmission system extending from the drive source through the clutch 140 to the alignment rollers 47i, 472 are provided. to release the follower 123 from its locked position, also resulting from members 126 to 130, thereby initiating paper feeding while rotating timing members such as a delay roller 137i, a rod 135, levers 135i, 1353, 1354 that control a clutch in the transmission system leading to the alignment rollers. After the preset time elapsed, that is, the time required for the complete passage of the previous copy sheet through the alignment rollers 47i, 472, the timing members stop the alignment rollers 47i, 472 and then the leading edge of the next copy sheet strikes these rollers and forms a loop. Thereafter, the paper feed signal is interrupted to stop the paper supply, after which the alignment rollers 47i, 472 reverse their direction of rotation to set in motion a sheet of copy clamped between them. In this way, paper feeding can be performed with precise timing.

In addition, the structure for this purpose may consist of a relatively simple mechanical structure.

When using a copying machine of the type which allows successive loading of the originals as described above, the paper feeding system of the invention allows the loading of successive originals in accordance with the speed of the paper feed, thereby increasing the copying speed.

One embodiment of a drying and fixing apparatus according to the invention will be described below.

¹ After completion of image transfer from the photosensitive drum 17 is separated sheet of transfer paper P in the same manner as described above, and then transferred to the drying UiStalovacího device 41. According to the invention the transfer paper is dried using a heater 58 and air, as indicated forward. The air for drying the paper is blown from the blower located outside the rear frame 72, via the duct 54 and the air outlet 552 to the drying and fixing device 41. At the same time a portion of air flows through the outlet 55i of the duct 54 into a triangular space formed between the photosensitive roller 17 and the transfer paper sheet. P to be separated from it, thereby helping to separate P paper.

Part of the air used for the separation, together with the transfer paper, also flows into the drying and fixing apparatus 41.

In the drying and fixing device 41, the air is heated by the heater 58, and the heated air stream and the direct heat from the heater 58 interact and dry and fix the image on the transfer paper P. Then air is sucked into the blower through the inlet 59 formed under the conveyor belts 57 through the rear frame 72 and is further routed to the conduit 54 for circulation.

This recirculation and reuse of the once used air for the drying and fixing process will never adversely affect the drying and fixing effect if the thermal conditions are maintained. The re-use of the air heated by the heater 58 results in a much greater thermal efficiency than when the air is completely discharged outside the device, and it is also appropriate to provide a rapid temperature increase in the drying and fixing device 41 at the beginning of the operation. The air used for the drying and fixing process is directed to the transfer paper separation location to contribute to the paper separation, eliminating any additional separation aid, and in turn results in a compact and simple construction of the copying device.

i Moreover, because output 55? of air is located above the conveyor belts 57 and the inlet port 59 is located below the conveyor belts 57, air may flow through the drying and fixing device 41 in a top-down direction relative to the conveyor belts 57. This ensures that the transfer paper P on the conveyor belts 57 is pushed I pulled down against these forced transmission belts. Where only a downward pull occurs, there may be damage if, if a number of sheets of transfer paper P overlapping each other are carried to the conveyor belts, only the lowest of them will be pulled to the conveyor belts while the other sheets will fly and clog. different parts of equipment. According to the invention, however, both downward pulling and downward pulling occur simultaneously, so that although a number of overlapping sheets of paper are carried upwards, the uppermost of them is held against flying away, thereby ensuring the forced transfer of all transfer sheets.

As described above, the photosensitive drum 17 consists of a photosensitive layer coated with a translucent dielectric layer and therefore, in a high humidity environment, moisture could penetrate through the outer dielectric layer into the inner photosensitive layer, thereby reducing the contrast of the image formed thereon. According to the invention, this can be avoided since a portion of the heated air stream through the air outlet 55i to assist the separation of the paper impinges on the surface of the photosensitive roller 17 to suitably heat the roller 17 and remove all moisture from its photosensitive layer. high ambient air humidity.

The transfer paper passes through a narrow path from the piaper feed point to the emptying opening, and this tends to cause clogging for various reasons. In this regard, a structure must be provided which would easily allow removal of any clogging with transfer paper. The top cover 161 of the copier is adapted to be opened vertically by a hinge 162, and the rear side of the cover 161 is provided with means such as a drying and fixing lid 163 and a guide 163i to direct heated air from the duct 56 to the transfer paper. P ¹ opening the upper lid 161 can transport belts 57 in the drying and a resting place 41 all be made available, with the exception of the space which contains few parts, such as a heater 58 and a discharger 60, thereby providing easy access to any zacpanému paper in the drying a fixing device 41 for removing it.

The main plate 166 for the transfer paper conveyor portion serves to accommodate the various elements that form the bottom of the drying and fixing device 41, such as conveyor belts 57, a plane reflector 41i and a heated air inlet 59, and some other elements at one end of the photosensitive. rollers, such as a separator belt 40, an image transfer charger 39, transfer paper guide 180, etc. The main plate 166 is attached to the device body for rotational movement about the shaft 164 counterclockwise, as shown in Fig. 34.

Upon opening the top lid 161, the main plate 166 may be pivoted or opened to provide ample space for access between the transfer paper separator assembly and the fo198110 tensitive roller, thereby allowing easy removal of any sheet of clogged paper therein.

Thus, according to the invention, the entire transfer paper path is readily accessible for self-handling of any clogged sheet of paper. In addition, this paper handling can be carried out easily and quickly by any layman, with respect to the simplicity of the construction in which the upper part of the drying and fixing device can be opened upwards and the lower part can be opened downwards.

Finally, a description of the electrical control of one embodiment of the copier according to the invention will be described.

In the copying apparatus according to the preceding embodiment, the book-original carrier 3 is provided with a book-original carrier 87, which is a glass plate, and a leaf-original conveyor 2 supported on the angles sliding along the rails 5t and 52 by rollers. The leaf original conveyor 2 is provided with a gear 89 at its front end and this gear is driven by a gear 77 formed integrally or by a coaxial and photosensitive cylinder 17, via the transmission gears 109, 111, 110 as shown in FIG. 3. and FIG. 4. The drive imparted to the gear 89 is transmitted via the synchronized rollers 9D, 92 and the synchronized belt 91 to the roller 21i and further via the synchronized belt 93 to the roller 94 and then to the roller 18i by the clutch control CLI. The drive from the main engine M1 of Fig. 2 is transmitted via the sprocket 96, the chain 95, the sprocket 98, the gear shaft 97 and the gear 108 to the drive gear 77 and the photosensitive roller 17. When copying the originals, the gears 89 and 11 are engaged, but when copying book originals, the gear 89 is disengaged from the gear 11 as described below.

The chain 95 also drives the sprockets 99 and 100 rotatably mounted on the shafts of the electromagnetic clutches CL2, CL3. Downstream of the electromagnetic clutches CL2, CL3, sprockets 101, 102 with a different number of teeth are attached to their shafts, which are connected by a chain 103. A roller 104 is mounted on the clutch shaft CL2, onto which a wire 105 with several turns is wound. The wire 105 is guided therefrom to extend past the pulley 106 and its opposite ends attached to the front and rear ends of the book original carrier 3. The book carrier 3 can be reciprocated by selectively using two clutches CL2 and CL3 for normal and reverse rotation of the cylinder 104. The toothing ratio of the gears 101 and 102 is selected such that the carrier return stroke is faster than the forward stroke.

¹ After the copy operation has begun and the preparatory operations for developing are complete, the photosensitive drum 17 begins to rotate while the book original carrier 3 stops in its normal position for copying from the leaf originals 89 and 111 engaged and with the rollers 21ι, 21z, 18ι , I82 that rotate. When a sheet original is inserted from the right side of the machine into the gap between the roller I81, I82, it is transferred to the left. As soon as the bulb 19 detects the front edge of the leaf original and also the light receiving element 20, the rollers 18, 1882 temporarily stop rotating and thus the original also stops.

When the photosensitive drum 17 arrives at a predetermined position, the cam gear 157 of the drum gear 77 actuates microswitches MSI, MS4, controlled for A4 or smaller sizes, and generates a start signal for the original, after which the rollers I81, I82 begin to rotate again. so that the original is further transferred to the left, synchronously with the rotation of the photosensitive drum 17 and v from the device by means of rollers 21i, 212.

¹ Switching operation to the way of copying book originals can be accomplished by depressing the toggle button 13 to cause the lever 632 to rotate counterclockwise about the pin 633, as shown in Fig. 4, by co-operating between the lever 13i and the protrusion 63i, that is, by lowering the cylinder 63 which is disengaged from the bottom of the sheet-receiving groove 65 formed in the cam 64 mounted on the bottom of the original carrier 3. When the carrier 3 is moved to the left, the roller 63 is inserted into the book-original groove 66 by the spring 634, and the sheet-feed conveyor 2 also moves with the book-carrier 3 and breaks the engagement between the gears 89 and 111. the front end 67i of the glass plate 67 of the book original carrier 3 reaches the position to which the photoelectric device 19, 20 reaches during copying of the sheet original.

Then, the book original to be copied is placed on the glass plate 67 of the carrier 3, the front end of the original flush with the front end 67i of the glass plate, and then the book original is held by the retaining lid 4, see Fig. 2. 1, and emits a start signal from the photosensitive drum 17 in the same manner as described in connection with a sheet-copy copying case. This signal excites the electromagnetic plunger SL3, so that after the cylinder 63 has been disengaged from the groove 66, the book original carrier 3 moves forward synchronously with the photosensitive cylinder 17 and exposes it through the slit.

Upon completion of this exposure, the book original carrier 3 is stopped in response to its own signal corresponding to the size of the book original, whereupon the carrier 3 begins its rapid reverse movement and stops at its start position as determined by the cylinder 63 and the groove 66.

When a multiple copy is to be continuously released from the same book original, this can easily be achieved by the abovementioned counter 14, operatively connected to the copy button 14 ‘. With each reciprocating movement of the book carrier 3, the cam 84 and the angular lever 69 rotate to actuate the ratchet mechanism of the counter 14 so that the book carrier 3 is reciprocated as many times as the number of copies is set and the copy buttons 14 'are released. stops the book original carrier 3.

In this embodiment of the copying device, the photosensitive drum 17 can copy originals of different widths, up to A3, and has a peripheral length somewhat greater than the length of A3. Therefore, when copying sheet-like originals, one of the A3-size originals can be fed for full-frame photocopy or two A4-size originals can be fed simultaneously in a direction perpendicular to its longitudinal axis. If the book originals are to be copied, after the forward stroke, i.e. the exposure stroke of the book original carrier 3, there is a back stroke that requires considerably more time than the forward stroke, and thus the time required to make one copy from the book original is twice the time needed for one copy of the leaf original. In particular, for A3-size originals, one copy can be made every two full revolutions of the photosensitive drum 17 for A4-size originals, one copy can be made for full rotation of the photosensitive cylinder.

As shown in FIG. 5, the cams 151, 152, 153 are provided on the underside of the book original carrier 3. Cam 151 actuates microswitch MS14 to sense the position of the original carrier corresponding to the original on it. Particularly, when the book original carrier 3 is in the prone original position shown, cam 151 opens the biased microswitch MS14-a in the control circuit of the book original control scheme shown in Fig. 19. Cam 152 actuates microswitch MS12 to stop the book carrier 3 the original in a predetermined position. The cam 153 actuates the microswitch MS10 for A4 or smaller originals and actuates the microswitch MS11 for A3 size originals, thereby providing a signal to move the original carrier backward.

The electrical control circuit for controlling the various parts of the copier will be described with reference to Fig. 10.

I. Leaf originals

Before the leaf original is transferred to the leaf original conveyor 2 on the book original carrier 3, the light receiving element 20 which constitutes the photoelectric detecting device 19, 20 generates an electromotive force and a transistor Q1 and accordingly a relay K4 for the original. the originals will be closed. Through normally connected contact K4-2 of relay K4, the electromagnetic clutch CLI is actuated and the gear wheel 89 is rotated, which in turn rotates the roller 18i to transport the original.

When the leaf original is transferred by means of rollers 18ι, I82 and its front edge reaches the detection device 19, 20, transistor Q1 and relay K4 open and the normally closed contact K4-2 of relay K4 connects and disengages CLI to temporarily stop the original. .

When the rotating cam gear 77 of the cylinder 77 connects the original microswitch MSI of the original, Fig. 3, the relay K5 is energized by the circuit K4-2, K5, D8, K8-2, MSI and held by itself by the contact K5-1 so that the CLI clutch excites through the K5-2 contact, which begins the transport of the leaf original.

At the same time, the cartridge interrupts light to the photoelectric device 155, 156, so that the transistor Q3, the microswitch MS19 indicating the cartridge insertion, and the low paper indicator lamp PL1 in the bundle will all be in the closed state and hence the normally connected K8 contact. 2 remains connected.

When the transfer paper P in the cartridge is A3 size, microswitch MS13 connects its contact A3 and microswitch MS16 opens. When the cylinder 17 continues to rotate and actuate the start microswitch MS4 of the following original, there is no response for the A3 size original, but if the original is A4 size or smaller, the relay K5 will re-energize the CLI clutch across K4-2, K5, D8, K8-2, MS4, D2, MS13-A4 to begin transferring the second A4-size original in one turn of the photosensitive drum 17.

In addition, the KB relay is energized via the K8-2, D7, KB circuit, normally closed contacts MS80, MS81, and is self-holding using contacts K6-1, K4-1. Rotation of the photosensitive drum 17 causes the cam 157 to actuate the microswitches MS2, MS5 for feeding the paper. When the original is of size A3, microswitch MS2 actuates the normally energized solenoid SL2 and creates circuit K6-2, SL1, thereby controlling the paper feed rollers 46, 47i of Figure 1 to supply a sheet of transfer paper. When the original is A4 or smaller, the SL1, SL2 solenoids switch over regardless of whether the contacts MS1B-A4, MS5 are connected or disconnected, thereby supplying two sheets of transfer paper for each revolution of the roll 17.

In the circuit shown, the microswitches MS80, MS81 are adapted to be actuated by the cam 159 of the photosensitive drum 17, so that their normally connected contacts can keep the relay K6 in the on state and additionally serve to generate a blockage detection signal.

When the interval between consecutive leaf originals is approximately equal to the distance between the rollers 18, 21, it can be seen from FIG. 20 that the contacts K4, K5 operate for a shorter interval than the microswitch MS2. Therefore, when using contacts K4 instead of K6, the solenoid SL1 does not wake up even if the original sheet has just passed through the rollers 18, 21, thereby avoiding paper feeding. For this reason, a relay K6, which can be actuated for a predetermined time, irrespective of the length of the originals, using the microswitches MS80, MS81 provided with the photosensitive cylinder 17, is used for actuating later than the microswitch MS2.

II. Book originals

When the book original carrier 3 is moved until its leading edge reaches a detection point corresponding to the position reached by the photoelectric device 19, 20 during copying of the sheet originals as described above, the connectors 149, 150 disconnect and the position sensing cam 151 on the underside. The original carrier activates the microswitch MS14 and closes its contact MS14-a for the book original.

When the start button 14 'is pressed for copying, the microswitch MS9 closes and forms circuit MS14-a, MS9, K8-1, K1, MS11-a3, MS13-A3, which energizes relay K1 and holds itself by its contact K1- 1.

The cam 157 on the photosensitive cylinder 17 gear 17 engages the starter switch MSI for the original and creates a circuit K3-2NC, Kl-2, K2, MSI, which energizes relay K2 for the front drive of the book orignal carrier 3 and holds itself with its contact K2-1. The contact K2-3 is closed and energized by the solenoid SL3, so that the engagement between the roller 63 and the groove 66 is released, thereby releasing the carrier 3.

Closing contact K2-2 causes clutch CL2 to move the book carrier 3 forward. The cam 153 actuates the microswitch MS10 for reversing the movement of carrier 3 for A4 size, or the microswitch MS11 for reversing the movement of carrier 3 for size A3, which is located in the path of carrier 3, thereby energizing relay K1 and accordingly relay K2. it disengages and disengages clutch CL2, thereby stopping carrier 3.

The reversing contact of the microswitch MS10 or MS11 energizes the K3 relay for reversing the drive of the book original carrier 3, creating the circuit MS12, K3, MS10-A3, MS13-A4 or MS12, K3, MS11-A4, MS13-A3, Holds K3-1 using its contact. Via contact K3-2 of this relay, the SL3 solenoid is energized to drive the book carrier 3 in the opposite direction. When the book carrier 3 returns to the predetermined position, i.e. when its leading edge 67i reaches the sensing position, the cam 152 actuates the microswitch. MS12, which opens and releases relay K4 and clutch CL3 accordingly, thereby stopping the book original carrier 3, in this position.

The start button 14 může may be pressed again to repeat the operation described above, or alternatively the device will be automatically actuated in response to the counter 14.

According to the invention therefore uses an electrophotographic copier of the image transfer cylinder can be easily switched from .a easily copy from leaf originals for copying of books _ori: originals of and vice versa, without the cumbersome exchange accessory. In addition, scanning the position of the sheet originals and scanning the position of the book-original carrier 3 during copying from the book originals takes place in the same position, allowing the use of a common start signal from the photosensitive cylinder to simplify the operation control. During the copying of a sheet original, if the originals have dimensions that allow the copying of two copies at full speed of the photosensitive drum, the transfer of these originals and the feeding of the copy or transfer sheets can occur synchronously with each other, thereby increasing the efficiency of the copying operation.

During the description of the invention, the scanning of the position of the leaf originals and the scanning of the position of the book-carrier were described as if it were in the same position, but in fact it is desirable that the stopping position of the book-carrier is set somewhat further away from the illumination device 22 for sheet originals, bearing in mind that there may be a difference due to inertia or a difference in the time required to stabilize the movement between the sheet original and the book original carrier when placed. movement by common signal. This additional distance of the stopping position of the original book carrier must be determined to an extent that in no way affects the start signal from the photosensitive cylinder and the operating sequence of the various microswitches and in addition the microswitches MS2, MS5 for paper feeding. the additional two microswitches must be adapted to be used when copying from book originals, or alternatively the signal for feeding the copy paper must be formed in accordance with the movement of the book original carrier.

Claims (4)

1. A photocopying apparatus for copying both a sheet and a book original, with a photosensitive environment, with an optical system for projecting an image of an original onto a photosensitive environment, with means for producing an image on a photosensitive environment, with a developing device, a conveying environment, with aids for transporting the transfer environment from the feed device to the outlet, with a station and with a housing for storing all of the above-mentioned components, characterized in that the book-original carrier (3) is reciprocating and integral the leaf original conveyor (2) and that a drive mechanism common to the book original (3) and the leaf original conveyor (2) as well as a locking device (63, 65) to prevent reciprocating movement of the book carrier (3) are provided original 1, when the conveying device (2) of the leaf-original is driven to copy the original. 2. Copying device according to claim 1, characterized in that the carrier (3) of the book original is movable into a first position for coupling with a drive mechanism for transporting a book original, and a second position prospojení with the transport device for transporting ^one sheet of the original. 3. The copying machine according to claim 1, characterized in that the housing (1) has fixed movable rails (5i, 52) or a book original carrier (3) of movable rails (107i, 1072) extending along their length and positioned relative to each other. opposite to the vertical direction, the bookcase (1) and book carrier (3) being connected to each other and defining two sets of adjacent spaces (A, B, C, D) separated by partitions, one set of spaces containing horizontal and vertical rollers (165, 166) with retainers (164) for limiting the freedom of horizontal and vertical movement of the case (1) and book carrier (3), and the second set of spaces includes vertical rollers (163) with retainers (161) for limiting the freedom of vertical movement. bookcase (1) and book carrier (3). The copier of claim 3, wherein the horizontal and vertical rollers (165, 166) with retainers in one of the spaces of one set and the vertical rollers (163) with retainers in one of the spaces of the other set consist of larger, larger rollers. than the predetermined dimensions of these spaces in directions to restrict freedom of movement. ¹ 5. Copying device according to claim 3, characterized in that the fixed and movable rails (5, SZ; 107i, 1072) are formed by a piece of an extruded alloy and the horizontal and vertical rollers (165, 166) are formed of synthetic resin.