DE1597203A1 - Photographic copier - Google Patents

Description

Eastman Kodak Company, 343 State Street, Rochester, Hew York State, United States τοπ America

Photographic copier

The invention relates to a photographic copier with a holder for negative masks of various types Penster size and an adjustable mask for the copy paper and / or a paper measuring device

The known copiers of this type normally have interchangeable negative masks for different negatives arOsse, so that copies of various Qröasen can be made with one and the same device can o The various largest negatives can with different image scales and a different value of the with regard to their size integrated luminous flux penetrating the negatives copied. Ausserde «can with some copiers a mask for the copy paper and a paper metering device according to the size of the copy to be shared. The QrOsse der

01318 20/0 8.4 5

In conventional copiers, copy is in a fixed ratio to the size of the corresponding negative. The user nut therefore make sure that the appropriate paper mask used in the processing of negatives of different Qrösse and the size of the copy customized paper feed is set · Will miss this setting, this may have the effect that the copy lst useless _e

The invention is based on the task of a copier to create, with which copies can be made from negatives of various sizes, but with the correct setting of the device, especially the use of a mask for the copy paper with the correct window opening and the correct setting of the paper measurement, takes place automatically.

This task is based on a copier of the type mentioned in accordance with the invention by a Control device released the negative mask inserted into the holder, each of which with a mark representing the window size 1st, which receives information about the window size and at least that for an automatic setting the mask for the copy paper and / or the paper feed

009820/084 5, JSAD original

- 3 measuring device generates necessary signals

The marking of the negative can be formed, for example, by a combination of pins that can be evaluated for one or more of the above-mentioned functions of the copier. At least two guide pins are preferably added to these pins who control various facilities. " In a preferred embodiment, the Nikroschalter cause the rotation of a rotary switch in a dependent on the combination of betfttigten micro switch position · The position to which the rotary switch is rotated, can be maintained even after the retraction of the negative mask ₈ for example by means of a further Mikrosehalters until a change is required This is advantageous in that it prevents the rotary switch from constantly moving back and forth · It was found that the service life of the rotary switch can be increased by 100 * in this way «

The light intensity can also be adjusted using the rotary switch can be adapted to requirements, for example by switching on one or more lamps and moving one or more neutral wire filters into or out of the light beam · Likewise, can

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ORIGINAL ν

A so-called negative size compensation by means of the rotary switch by switching on a resistor of a suitable size «. Through the Negative size compensation is the exposure time set to the correct value.

The adjustment of the size of the mask for the copy paper can be effected by the mask leaves are displaced corresponding position in one of the position of the Drehsehalters _o MakenblStter can be thereby driven by a reversible motor which is controlled by a reversing switch, the position of which in turn from the Position of the rotary switch is dependent «

The automatic feeding of a photosensitive copier paper of the correct size can be done by means of a to a Conveyor roller which can be coupled to the drive device takes place, in which the separation of the conveyor roller from the drive device takes place depending on the position of the rotary switch.

In one embodiment of the copier according to the invention is a with automatic copy paper measurement the drive shaft of the conveyor roller revolving magnet is provided, one after the other, fixed in space and lings

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magnetically actuated arranged along the path of the magnet » Bare tongue contact switch switches until the switch which has been selected using the rotary switch, it closes and uncouples the conveyor roller from the drive device «The magnet can be a horseshoe magnet and is preferably provided with a soft iron screen, which deflects the magnetic field * By means of such a screen one can generate a magnetic field that is sharply focused on is limited by an arc “The rotating magnet can do so be arranged so that it can extend a full rotation of 360 °, which has the advantage that it has a has a precisely defined starting position

In another embodiment for controlling the paper feed, several magnets are arranged at a distance from one another around the drive shaft of the conveyor roller and are firmly connected to this shaft. The copy paper is continuously fed in until the conveyor roller is uncoupled from the drive device. This purpose, a single magnetically actuated ZungenVontakt8ehalter _s of the stationary next to the Bewegüngsbahn of the magnets is arranged. The switch is therefore closed every time one of the magnets passes it.

009820A0845

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BAD ORIGINAL; C

■ j

The contacts of the “voters” are selected to the point of rotation. Venn of Zungenkontaktaehalte * often ao ge "sohl00 's been 1st, al» Sehritte dee contacts "1" voters are required vm su de * worn Dreheehalter from selected contact au arrive, another circuit is closed, whereby the conveyor roller τοη its drive is uncoupled

In the following, the invention is reraehledener at the edge

Auastiegabelaplele shown on the drawing

Explained in one

Ee «own:

Pig · 1 is a schematic and perspective view Viewing a negative mask and parts of an embodiment of the control device;

Pig. 2 a eeheaatiaeh and shown in perspective Looking at a mask for the copy paper and its control;

Pig. 3 a shown schematically and in perspective Looks at a version of the copy paper "umeeeung;

Flg. 4 a Torderansloht of a magnet and its Sohirmee for the device according to Pig.3;

009820 / OÖ45

Flg. 5 a schematic)! and shown in perspective another embodiment of a controller for the Xopierpaplersimeesttttgo

A holder 9, shown visually, carries a negative mask 10 sur recordings of a negative of a starry orose · The mask 10 has a window 11 that the size of the Image area of the negative is adjusted «The mask 10 is against other noses interchangeable, all with the same external dimensions have, but the windows of the different Qr5ssen adapted to the negatives.

Each of the masks 10 has a Sate projecting pins 12 in an are for the window size and daalt the BildgrSsse the negative characterizing combination to _0. Two of the pins 12 Pührungstifte, one of which old susaamenerbeitet a Mlkrosehalter "The other pins 12 are arranged so that they actuate a corresponding combination of different milk holders 11, which are arranged next to one another in a row 13, among other things to select a circuit corresponding to the combination and to control the current flowing through it. The mask holder 9 is arranged close to the row of switches 13 so that the pins 12 old actuating pins 12 * of the microswitch 1 * interact when the mask 10 is inserted.

009820/0845

The Sats of pins 12 and deals a certain activity the microscope holder 1 * causes a drive to be excited, what the turning of a rotary switch * 20 in one of the stlftkoabination and deals the size of the negative order Position as follows · The rotary switch 20 has a Wave 19 on · The Susaaenwlrken of the Nllcrosehalter 14 old The rotary switch 20 can be done in a manner known per se. One of the possibilities is Selgt 'ig · 1 »where one of a power source 15 costing Stroa the row 13 of the switches U through air and a motor 17 is excited, the fiber Gears 18 the shaft 19 and therewith the rotary switch 20 turned to the desired position

In the exemplary embodiment animal, the rotary switch 20 has separate contact _{fingers 20A 9} 20B, 20C and 20D, each of which is able to connect the energy source 15 to a different assembly or puncture group of the copier. For example, bank 20A controls function A, bank 2OB function B, bank 2OC function C and bank 2OD function D of the device Starting point _β Which of these starting points is selected depends on the rotational position of the contact that is connected to the energy source and is non-rotatably arranged on the shaft. For the sake of clarity, only contact 22A is shown.

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dee via a not shown clutch can be driven, in the benches can be turned into different positions according to the actuation of the holder 1 * tu "Bei de" in 1, the rotary switch 20 is rotated into a position in which the contact 22A of the bank 20A is the outlet 21A is connected

In order to hold the movable bench 20A in the selected "position defined by the holder lh , a lock not shown" may be present "which can also be controlled by one of the retainer 14" * In other positions, the bank 20A selects one of the other outlets 23A to $$ S, etc. from “where function A can be controlled in different ways. Banks 208 to IOD control function B ₁ C and D via outputs 21B, 210 and 21D in a similar way. The output contacts of banks 20B ₉ 2OC and 200 are each indicated by a Klanner «

The in Flg. 1 shown device can be any number of Control functions of the copier. For example, function A can be the lighting * intensity, function B the Negative size Konpensaitlon · Function C the adjustment device For the mask of the copy paper and function D control the paper measurement.

⁰⁰ B

With the lighting "intensity control, which is not shown, can be controlled by the rotary switch 20 and the Ab" gang 21A flowing stroa the excitement of one or more Control lamps for fluoroscopy of the negative. Besides that can a possibly necessary »introduction of a neutral Diehtefliters In den Licht» beam and, if desired, the Ausweehs & ung or Einetel « development of a condenser system in the optical path of the Copier can be controlled.

The current that flows through the bank 2OB and through the Abang 21B tiles, can control a negative impact compensation device by including a combination of one or more resistors of a predetermined size in a photoelectric Control circuit to end the exposure of the copy paper after a certain time has passed is"

FIGS. 2 to 5 show devices according to the invention The control of the paper mask and the pcupWz measurement ent » speaking of the signals coming from the rotary switch 20. VIe As shown in Fig. 2, the device for controlling the receives Paper mask the signals from the bank 2OC. A shaft 30 is driven by a reversible electric motor 31 via gear wheels 32 and 33 driven · A rotation of the gear 33 also causes the rotation of gears 33 and 35 « which, for their part, move a rack 36 translationally «

With the toothed rack 36 you can see a first “diaphragm blade Q09820 / 084S BAD ORIGINAL

37 along a guide rod 38 “over a pinion 39 and a Rack 40 becomes a second diaphragm blade 41 by the same amount "but in the opposite direction as that first aperture leaf 37 »moved ·

A stationary ring 44 is fixed "for example by means of rods 45""attached to a fixed surface", the fixed ring is with several electrical Kentakten 46A to 46H are provided "which are arranged in a suitable manner for controlling the direction of rotation and duration of the current flow through the motor 31". In the exemplary embodiment, two banks of contacts 46A to 46D and 46E to 46H are provided. In the first bank of each of the contacts 46A "M6B or 46C is connected to an output contact of the bank 2OC of the rotary switch" 20 "The contact 46D is connected via a connecting line 53 connected to a first relay 51 Xn of the second bank, the contacts 46e ₈ 46F and 46Gf connected to one output contact each of bank 20C, while contact ¹ 16H is connected to a second relay 52 via a connecting line 54.

The contacts 46A to 46H surrounds one of two separate halves 47A and 47B from each other existing Ring _0, the two halves to be bought or axial projections 48A "48B

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keep the means of Sttttsen 49A bsw · 49B firmly old the Shaft 30 are connected. Oils in both ring halves 47A and 47B slide on the shaft 30 when the shaft 30 rotates Contacts of the ring 44.

The mode of action is as follows

By selecting a contact Pleaseis of the rotary switch 20, a circuit is closed which, when the switch is in position, is activated by the energy source 15 via the bank 20C, the outlet 21C, the contact 46A, the ring half 47B, the contact 46D and the connecting line 53 sun relay 51 extends, whereby the Stron by connecting lines 50 in a beetlernten direction _β paths flieset the generated thereby energizing the motor 31 drives the gears 32, 33 »34 and 35 and thus moves the diaphragm blades 37 and 41 · the rotation of the gear 33 has but also a rotation of the split ring 47A, 47B result. Nlamt "that the rotation of the shaft takes place at in instant 30 lsi Qegenuhrselgersinn at a viewing direction from the left end of the drawing, the rotation is Welter, until the ring part 47B of contact 46A expires _β since hereby the Stroakreis sun relay 51 is opened and Then the motor 31 is shut off · The shaft 30 rotates in the opposite direction when the bank 20C of the rotary switch "20 connects the power source 15" to one of the contacts 46E, 46F or 460 · This

009820/0845

a circuit is created via the connecting line 5 * mn relay 52 closed · Of course, «in · Device not shown to be seen, which hurries to ensure that the circuits remain interrupted »during the ring aids * 7A and * 7B return to their starting position

Pig 3 shows an embodiment of a device Control of the metering of the in the exposure «station des Photocopying paper to be introduced into the copier " A main shaft 60 is connected to one that measures the copy paper Conveyor roller 61 is coupled and can be driven by a motor 63 via a shaft 62. The motor 63 is in the exemplary embodiment Coupled with the shaft 62 via gears 6 * and 65. The two shafts 60 and 62 know by means of a normally engaged »see diagram shown Coupling 66 are connected to one another in a rotationally fixed manner. On the shaft 60 there is a ratchet wheel 60 with one The pawl 68 can engage and prevent movement of the shaft 60 and roller 61, see below. The pawl 68 is normally auster intervention and nlttela one Magnet 76B movable into the locking position.

A stationary, electrically conductive ring 69 is not symmetrical the shaft 62 and carries its magnetiaoh actuatable Gas contact switch 70 "Each of the Senate gas contact switches

Q09B20 / 0846

is on the one hand to the. Ring 69 connected., The other contact is connected to one of the output contacts of bank 2OD of rotary switch 20. A magnet 72 which is fixed to the shaft 62 by means of a holder 71 _c moves upon rotation of the shaft 62 along the ring 69. As Pig.4 shows ", the magnet 72 having a field ferromagnstIschen = baffle 73 provided BCIN _8, the sharp edges of the magnetic field gives "

The current runs from the ring 69 via a verb -! 'Lungs line 75 and a lever 77A about an axis 78A pivots a line 75A to a Sehaltraagneten 76A ₉ when energized, and thereby, the clutch 66 separates ₀ Upper parallel connection line 75B is the magnetic 76B controlled, which when excited pivots a lever 77 B about an axis iBli and thereby brings the pawl 68 into engagement with the ratchet wheel 67 »

The mode of action is as follows;

First, the holder 71 holds the magnet 72 in a predetermined starting position "and the motor 63 stands still". The motor 63 can * be designed in such a way that it only makes one revolution and then comes to rest again _o However, a control can also be provided soln ₈ after the rotational movement of the shaft 62 in the abhangige of the position of the rotary switch 20 position the motor 63 and thus the holder 71 and the magnet 723n its initial position surückbringt "the actuator" operation is triggered by a signal 1%, the engine the 63

009820/0846 _copy

BATH ORIGINAL

energized ,, then the gears 6k and 65 and the shaft 62 rotates, "The signal 74 can be generated directly by one of the Mikrosehalter 14 by a pin 12 of the negative mask 11 or at the beginning of the rotary movement of the Drehechalters 20th If the magnet 72 is passed close to the normally open protective gas contact "switches70" arranged along its path, it causes the switch concerned to close when passing. The Sehliessen the switch remains, however, as long as no effect _t until the magnet switch those reached, the s & disposal over ZW uM oils Bank 2oD is connected to the power source 15th

By closing the selected switch 70, a circuit is completed ₈ which runs from the energy source 15 via the switch SO _{9 to} the outlet 21D ₆ the selected switch 70 _{e to} the ring 69 and the connection lines 75, 75A and 75B to earth. the current in the connecting "circuit 75A causes the separation of the clutch 66 _t while the current in the Verbindtmgaleitung 75B the engagement of the pawl 68 into the ratchet wheel 67, thereby stopping the shaft 60 caused the conveying roller 6l can thus in a selectable degree that _{6 can} be rotated from a small part of a full revolution to a full revolution depending on which of the protective gas contact holders 70 is selected «.

Another embodiment of a device for metering the copy paper is shown by Pig. 5 “Some parts of this list

COPY BAD ORIGINAL

-inform corresponded to part · »of the execution fora according to Flg. 3 · You have the same license plate. "However, otherwise «It is provided with a« line ».

The main difference between the versions According to FIGS. 3 and 5, "with the latter make the conveyor roller one complete revolution older can · You can rotate continuously »whereby the duration of the run depends only on the means of a selector The set limit depends on the 1st «The voter at 1 »Execution example that uses the rotary motion finish the role

Like Flg. 5 selgt, a conveyor roller 6l · sits on a main shaft 60 ', which can be connected to a driving shaft 62 *. The shaft 62 is driven by a motor 63 over the belt pulleys 64 'and 65' and a belt 80 running over them driven. For coupling the shafts 62 * and 60 »is a normally closed coupling 66 is provided, which is shown schematically. Am ratchet wheel 67 * on the shaft 60 * and a locking lever 68 ·, which normally controls the ratchet wheel 67 * not touched, allow the shaft 60 to be braked.

Instead of the single rotating magnet and the multitude of stationary gas contact so-holders of the embodiment According to FIG. 3, several magnets 87 are provided »dl · Fastened at a distance from one another on the circumference of a drum 86, which sits non-rotatably on the shaft 60 * «mowing

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of the magnet 87 is a magnetically actuatable, normally open tongue holder 84 arranged in a stationary manner one side of this tongue contact is on one side Energy source 83 connected, while the other side is connected via a connecting line 85 with a selector 79 in Connection stands, which besltsfc only one continuation direction. The voter 79 ve is several Sehalter 81, each of which has a contact 8lA and 8lB. The first contacts 8IA are connected to various output contacts of bank 2OD of rotary switch 20 "The" wide contacts 81B the switches 81 are all connected to a common outlet 89, which carries a relay 90 below. A work » contact 91 ds Reals 90 is in the excitation circuit of the Clutch 66 * and brake 67 *, 68 * · Bin Sohliessen of the normally open contact 91 has the consequence that the clutch 66 * is disconnected and the brake is activated «The selector 79 also has a selector that is switched off« Leadership example is formed by a contact piece 82. The KontaktstQek 82 is from an initial position Step-by-step from one position to the other, the starting position is in the execution envelope the one that lies furthest in the counterclockwise sense of the word. The task of the Kontaktet0ckeβ 82 is the two Connect contacts 8lA and 81B of the selected switch 81 with each other and thus the circuit of the relay 90 su soliessen · The step-by-step movement of the contact piece 82 is effected with a known step circuit. In the exemplary embodiment, each time the machine is closed

D09820- / 0846

sen of the tongue contact holder 8 * a further switching of One of the switches 81 goes to the next one of the monitor 81 goes ■ on the assumption that the contact piece 82 is gradual Movement in the furthest clockwise direction The initial position begins, then the switch is 8 * four times during one complete revolution the hawser! 86 closed · This causes a movement of the contact piece 82 by four steps · Oa the magnets 87 in fixed distances from one another are arranged on the circumference of the drum 86, the vision corresponds to successive Sehalter 8 * certain length dimensions « For example, every Ita rotation can be a paper measurement of 10 em, so that each blind of the sole holder corresponds to a paper feed of 2.5 cm = of course it can of voters see 79 or more, even hundreds of contacts besltsen, so that a paper measurement is possible in wide areas and finely graduated, for example fractions of 1 cm to very large lengths, “It is obvious that the magnets 87 are positioned on the drum 86 in this way Can be arranged to be practically any Paplersum measurement can be selected *.

The working mode of the embodiment according to FIG. 5 1st

the following:

The motor 63 * starts on Orund a start signal 88, -

this is similar to the start signal 7 * according to the embodiment

Fig. 3 let · The engine 63 * is however not an engine that only

makes one revolution like the motor 63, but it runs

009820/0 8 45 ORIGINAL BATHROOM

continuously until the shafts 60 * and 62 'are separated from one another. At this point in time, a suitable signal can be generated to switch off the motor ^{again for 63 s} . It is assumed that the desired length of the photosensitive copier paper to be fed is 12.5 cm let 87 selected the distance between two of the magnets no, that he speaks a paper feed of 2.5 cm ent "that contact piece 82 is in the initial position, as Figs. ₈ and the bank 2oD 5 shows the rotary switch 20 in DL® position shown has been rotated, in which that switch 81 of the selector 79 is selected, which is reached after five switching steps

When the motor 63 starts to operate, causing the rotation of the shafts 62 · and 6O ⁹ and the conveying roller 61 ° to 'the copy paper _β Schllesst the first magnet measurement switch 84, then causes the current supplied from the Energleqeulle 83 and through the connection line 85 forwarded current 'a movement of the contact piece 82 from its starting position by a first step, whereby it bridges the two contacts 81A and 81B of the first switch 81.But since the first switch 81 is not selected by the bank 20B, the circuit of the Relay 90 not yet closed. When the switch 84 closes for the fifth time, the contact piece 82 is then moved into the position in which it bridges the contacts 81A and 81B of the fifth switch 81, which is selected by the rotary switch 20. The bridging of these at «

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BADORlGiNAt.

the contact "causes the circuit to close" from the energy source 15 _{via the bank 20D 9} dl connection line 21D * ₉ the contacts 8IA and 8IB of the fifth switch 82 and the connection line 89 to the relay 90, what causes this to excite and the working contact 91 closes. Since the work contact 91, in turn, has "since""" in current from the energy source 15 over the "connection" lines 92, 92A and 92B flows. The current flowing over the connection 92A excites the magnet 93A _9, which results in a pivoting movement of the rebel 9HA about the pivot axis 95A and a rotation of the coupling 66 * . The current flowing through the connecting line 92B excites the magnet 93B ₉ so that it pivots the lever 9HB about the pivot axis 95B and thus brings the pawl 68 * into engagement with the ratchet wheel 67 *. This causes the movement of the conveyor roller 6i * terminated o A device, not shown, may be required to guide the locking pawl 68 * back to its starting position when the roll 61 'is to be released for paper measurement.

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Claims (1)

1597.7Ü3 Claim · ι 1. Photographic copier with a holder for Negatlvaasken of various penster sizes and one adjustable mask for the copy paper and / or a Paplerzumessvorrlehtung, characterized by a control device (14,20), the ron in the Holder (9) used negative mask (10), of which each with a window size representative Marking (12) is provided that receives information about the penster size and that for an automatic Setting at least the mask (37 »* 1) for the Copy paper and / or the paper metering device (61,61 ') generated necessary signals 2ο copier according to claim 1, characterized in that the control device has a switching device (13 _> 2O) that can be influenced by the marking (12) for selecting and controlling at least one of several circuits and that an actuating device responding to the selected circuit is a motor (31 »61.61 ·) provided 1st · 3ο copier according to claim 2, characterized in that that the motor (3D of the adjustable mask (37, assigned 1st « BATH ORIGINAL
009820/0845 ' 4 «copier according to claim 2, characterized in that that the motor (63.63 *) bit of the paper feeding device (61,61 ') is connectable. 5. Copier according to one of claims 2 to 4, characterized in that the .stellvorrichtung a connecting device (44,46A to 46H, 47A, 47B; 79,84,90) for controlling the motor as a function of the switching device (13 »2O ) has _o 6 · copier according to claim 5 » characterized in that the connecting device has a first contact (46a to 46C, 46E to 46Q) which is connected to the switching device (20), a relay (51 * 52) controlling the motor, a second old the contact (46D, 46h) connected to the relay and a contactor (47A, 47B) driven by it, which cooperates with the first and second contacts 7. Copier according to claim 6, characterized in that a shaft (30) driven by a motor (3D) around at a distance from one another contacts (46A to 46R) of the connecting device are arranged, which a split ring O7A that can slide on them, 47B) is assigned as a contactor which is non-rotatably connected to the shaft (30) and is connected to the first and second widths Contact (46A to 46C or 46D, 46E to 46a or 46R) 009820/08 * 5 at the beginning of the setting process of the mask (37, ¹ O connects and at the end of the setting process the connection is interrupted again 8 · copier according to one of claims 2 to 7 » characterized in that the paper metering device has a conveyor roller (61,61 *) which is attached to the motor (63,63 ') by means of a electrically controllable, normally closed coupling (66.66 *) connectable shaft (60.60 *) attached 1st. 9ο copier according to claim 8, characterized in that a drum (86) sits on the shaft (60 *), which carries magnets (87) arranged distributed over its length and that a stationary closed, adjacent to the drum, Magnetically actuated switch (84) ₉ which closes each of the magnets (87) when passing, and a selector (79) with only one port switching direction is provided, which has several pairs of switching contacts (81), one of which is a contact (8IA) of each pair with the Switching device (20), the other is connected to the control circuit (90) of the clutch (66 *), and has a step-by-step movable bridge (82) which moves to the next pair of contacts (81) each time the magnetically operated switch (8H) is closed is and when the bottom of the by means of the switch-9820/0845 device (20) selected contact pair the control circuit of the clutch (66 *) closes _o 10o copier according to claim 8, characterized in that the drive shaft (60) of the conveyor roller (61) is surrounded by a stationary ring (69) which carries several magnetically actuated switches (70) that are open in retirement the coupling (66,76A) and on the other hand can be optionally connected to an energy source (15), and a magnet (72) rotating with the shaft (60) and cooperating with the switches (70) carries _β 11 · copier according to one of claims 2 to 10, characterized in that the switching device several of the marking (12) of the negative mask (10) controlled first holder (14) and several Second switches (2OA, 2OB, 2OC, 20D) connected to control circuits and a drive device (17,18) which is controlled by the first switches (14) and at least one of the second Switch to a position assigned to the marking to control at least one of the control rods emotional. 009820/0845 BATH ORIGINAL 12c copier according to one of claims 2 to 11, characterized in that the switching device (13, 20) has a rotary switch (20) which has a the marking (12) of the negative mask (10) assumes the corresponding rotary position * 13c copier according to claims 10 and 12, characterized in that the rotary switch (20) between the energy source (15) and the magnetically actuatable switch (70) is switched, with the different rotary positions of the rotary switches each have a different one of the magnetically actuatable ones Connects switch (70) to the energy source (15), 14ο copier according to one of claims 11 to 13, characterized in that the marking of the negative mask (10) has projections (12) with Actuating pins (12 *) interact, and the second switches each as rotary switches (2OA to 20D) are formed, each of which has several stationary contacts (23A to 23E) and one optionally with having a movable contact (22A) which can be connected to these stationary contacts and by means of a Motor (17) is drivable « 009820/0846