DE2260291A1 - PARALLEL FAST PRINTER - Google Patents

Description

X patent attorneys

&»·" ■ "· ■". '.. .y
,. Tel. IS

8, duz. 1972

ΡΙΤΝΒΪ BOWES ALPEX INC.

The invention "relates to parallel high-speed printers dynamic writing, as it is generally used in connection with electronic data processing systems, for example in connection with an electronic registration or Computer system, and it relates in particular to a Printer specially designed for cash register systems at the point of sale can be used, for example in department stores, etc.

Numerous printers are known in the prior art, which are designed in such a way that they can be integrated into systems of one kind or another, including printers with dynamic Spelling with a continuously rotating multi-column type drum is provided, the printing process being carried out in such a way that the Paper is struck against the types in the individual advancing columns until a whole line of character positions is on the paper

309825/0834

pier is printed out, whereupon the paper is advanced. The invention relates to a printer of this general type.

The invention has, inter alia, to provide a printer with the associated electronic devices, in which for Printing an entire line of characters no more than one complete drum revolution is required and in which the Acceleration and type drum stop mechanism almost immediately be brought back into the power-storing position and the paper is transported on at the same time, so that the Printing unit ready for operation immediately to initiate a new printing cycle β without loss of time, because the drum only return to an arbitrarily selected starting position would have to, which would at least require the duration of a partial revolution.

In addition, the main object of the invention is to create a printer in which the mechanical punctures and the electronic punctures are so combined in an optimal combination are that writing hammers through Pe de rau solution to strike of the paper can be accelerated against a type drum, which is driven by a motor to make constant rotary movements will. The same engine also delivers the relatively high one Torque that is required to accelerate and Stop mechanisms attributed so that in their springs after each Print cycle is again saved working capacity, and also to advance the paper. The execution of these and other work processes is subject to electronic control Control means which not only serve to control the reset cycle of the To initiate acceleration and stop mechanisms, but which also respond to the rotational position of the drum and an actuation of the mechanical devices for Strike against the drum always trigger when the corresponding types in the individual, adjacent and similar Character columns of the drum reach the stop point in the course of a printing cycle. It is an interaction of the mechanical System with means for retransmitting various information

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2260231

provided in the electronic control circuit, such as the information via cyclically recurring door gears such as "for example the respective position of the type drum, but also about others To provide information about processes, for example when the operator intervenes and triggers the paper transport by hand or insert a sales receipt into the slot provided and the like ♦

If the printer is not in operation, no effort is required to keep the writing hammers in the state of application of force to hold, i.e. in the state of operational readiness for printing the next line of characters as soon as an actuation should be done by the electronic control means.

Another object of the invention is to provide a printer to create that is very versatile and readily available for use in conjunction with computer or registration systems of various different Kind can be prepared. In terms of mechanical equipment, the printer has a mounting frame that has a drive motor carries and on which the paper feed, a continuously rotating type drum, the paint application means for this, one the impact force delivering and resetting arrangement as well as the Control mechanisms for said components are provided. at of the illustrated embodiment is the arrangement which the Stop force supplies and the reset causes, as replaceable Part arrangement or assembly formed in comparison to the type drum is easy to assemble on the mounting frame. To this assembly belong in comparison to each Character column of the type drum a writing hammer acceleration and stop mechanism including a hammer Angle lever, one arm of which is arranged so that the writing hammer can be accelerated, while the other arm with the Force of a stop drive spring is loaded, and a latching and free would be device for the printing mechanism. The assembly includes also means for returning all acceleration and stop mechanisms to the latching position. The assembly is in opposition to the drum with the help of some swiftly too

looser

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releasing fastening elements stored on the mounting frame and can therefore be easily removed from the mounting frame for maintenance purposes η. The modular design also allows a corresponding versatility in the choice of the printing mechanism required in each case for printing out various types of information. In one embodiment, the printer according to the invention has a writing drum with 22 character columns, these columns all being identical to one another and being aligned with one another in the transverse direction so that the characters appearing on the drum surface in each of the 40 lines are the same line by line. In this embodiment of the invention, these 40 characters comprise the alphabet, the number symbols 0 to 9 ^and a few more punctuation and special characters. To apply the printing ink to the drum, a f arb ge impregnated, porous roller is provided which is moved away from the drum when the printer is taken out of operation and which is brought up to the drum when the printer is started up. The paper closest to the drum strikes directly against the types and is therefore printed with damp printing ink, while all other papers are printed at the stop point with an interposed carbon paper or by using a paper with self-copying capabilities. The writing drum is received in a cantilevered part of the structural frame and in this respect is itself a part of the structural frame that extends to one side, paper guides being provided which extend over one surface of the cantilevered structure and have openings through which the paper is struck against the drum by the mechanism in which the stopping force supplying and resetting part is arranged, which is provided on the paper guide plates in opposition to the drum. In the above embodiment of the invention, a roll of double paper tape is carried by an axis within the printer, and the two paper tapes are unwound from the roll and passed between the paper guide plates to appear behind them. One of the ribbons exits the printer via a cutting knife, so that a note is separated and

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can be given to the customer as a receipt, whereas the other volume then a chronological sequence of documents contains and on a provided in the printer, powered take-up spool is wound up, thus providing a record of business operations. Between two more paper guide plates the operator can use sets of paper forms or. cards introduce such as cash purchase forms, filing plan forms or loan purchase forms, which are then printed simultaneously with the double paper tape by the same printing device, so that all Print documents must inevitably match one another, since they can be made by one and the same printer in the same operation. Special care is given to the compulsory drive of each the transport rollers are used for the belt and for the inserted forms in order to prevent the papers from moving during the gate movement move against each other. If a form is to be inserted by hand, the operator pulls the on the The handle provided on the transport rollers and pushes the form into a suitable paper slot through which two of the Paper guide plates is formed. Two sensors are provided that respond when the form is fully inserted and the roles attack again on the paper, whereupon the electronic control system receive signals from these sensors so that printing is resumed.

A further object of the invention is to provide a mechanism which supplies the stop force and serves for resetting to provide that includes the above components in the form of a dismountable subassembly or assembly, it is desirable but it is not absolutely necessary that this assembly is from the Mounting frame can be removed. The assembly includes a pivot block machined to have slots formed in which a plurality of angle levers is pivotally mounted side by side in such a way that these levers of the desired number of Write places correspond, the angle lever components of the Acceleration and stop mechanisms are used as a single Whole are arranged between opposite side plates. Thanks to the modular design, the number of these mechanisms in

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Adaptation to the number of each on a particular type drum The designated character columns can be changed slightly. The assembly that provides the stop force and is used for resetting includes a comb-like support and guide plate for the hammer, the one Number of slots having the Tjpenspalten in their spacing correspond to the drum, with these slots for storage the stop parts are used, which are referred to here as a hammer and which are not used with any other part of the loading and stop mechanism are rigidly connected. These hammers all have a careful one selected individual mass, which is, however, the same in each case, and these masses are each an acceleration to strike issued against the paper, which in turn, when releasing the spring force by the Hammerbe acceleration mechanism against the Writing drum is struck. The hammer acceleration belts are carried by shafts that extend through the aforementioned pivot block, and this also includes the angle levers, each of which has a first arm that lies under the hammer in question and can strike it against the paper, and a second arm connected to a dedicated mainspring carried by the pivot block. The pivot block also carries a ratchet device for each lever, whereby the bell crank is in one position by this latching device is latched in which the associated spring working capacity stores with the hammer removed from the paper. The assembly also includes decks with notch solenoids, which are selectively released by the electronic control circuit the associated pawl are actuated so that the first arm of the released angle lever accelerates the hammer in question can issue in the direction against the paper, whereby this is struck against the rotating type drum. In addition reset mechanism according to the invention include reset jaws, which extend over the angle lever and with cam followers which slide along cams provided on each of the side plates of the assembly, these cams are carried by a common reset shaft. When the cams rotate, they pull the rockers in a direction

309825/0834

in which the angle lever is again in a force-storing position be latched. The electronic control includes means for Actuation of a clutch in the sense that the Bück adjusting shaft every time is coupled to the main motor drive when the mechanism has gone through a print cycle. The paper is transported during the rotation of the cam when the return shaft is coupled by the coupling.

A further object of the invention is to create a system for generating the impact force, in which the accelerating slö send η angle levers are provided separately from the stop hammers to reduce the mass of the hammer that strikes the paper against the drum from the mass of the To keep the angle lever separate , which is spring- loaded in the Yerklinkungsste llung to accelerate the hammer mass, because the angle lever part of the mechanism has a significantly larger weight than der.Hammer. If you keep in mind that the type drum is rotating rapidly, it is clear that it is very important to keep the dwell time of the striking hammer mass as short as possible so that the rotating types of printing do not cause any smearing on the paper. The general rule is that the hammer must be accelerated very strongly, whereby its mass should at most be as large as is necessary for printing the cards and papers inserted one on top of the other, so that the kinetic energy is immediately fully absorbed when striking, so so that the kinetic energy after the hammer rebounds is no longer sufficient for a second strike against the paper. If the angle levers were connected to the hammer masses to form a whole, they could not be set independently of the mass of the angle lever in order to ensure an optimal execution of the printing process and at the same time to switch off the second impact after the rebound if possible.

The invention also has the creation of another respective hammer attacking light wire spring to give on that a fixed part of the assembly providing the stop force touches, so that this spring when returning the hammer after

Attacks

309825/0834

Hitting the paper can help hold the hammer in its rest position, as it also has kinetic energy that could otherwise snap the hammer against the paper a second time. The one provided on each of the hammers Wire spring has coils on both sides of the hammer, which gives the spring a greater resilience.

A further object of the invention is to create means which are suitable for undesired printing on the paper to prevent in an adjacent column, if by hitting the hammer against the paper a character lying next to it is printed. Such a release agent is then of particular importance when a wet application of printing ink takes place on the type drum, since in this case already with a very light touch an unintentional impression is created with the blackened drum can. To separate the types in adjacent columns, the invention teaches the use of shields between adjacent columns Printing nips of the type roller. These shields can be in the form a wire mesh similar to an egg cutter, with the wires extending through the openings in the paper guide plate wegerstreoken, which is closest to the writing drum, and are guided tangentially between the columns. Since the Wires from the type drum extend only slightly further radially outward than the writing surface η of the types, the paper becomes split into the neighbor from the wires at a distance from the Printing types held when a hammer strikes the paper against a type in a certain column. In a preferred embodiment of the invention, rigid rails are provided instead of the wires, these rails, measured in the radial direction from the axis of rotation the drum, are slightly higher than the pressure types.

In addition, the invention also has the task of providing a Acceleration and stop mechanism for the writing hammers too create the feature of adjustability in several respects as, among other things, precautions have been taken to allow adjustment of the driving force, which are stored in the mainspring intended to operate the hammer accelerator to hit the hammers against the paper. A

Another feature is the adjustability of the individual solenoid release means, so that the solenoids are the hammer accelerators in response to similar electronic release signals all release at the same relative time.

Further objects and advantages of the invention emerge from the following description, in which reference is made to the drawings is taken. Show in it »

Figo 1 is a perspective view of the printer according to the invention in the fully assembled state, but with the cover plate is removed to the view of the envisaged for the transport and printing of the paper mechanism release "

Fig. 2 is a perspective view of the same printer in a different viewing direction and in a partially dismantled state »

Fig. J) a perspective view of the printing unit from the side of the mechanical drive, the. Drive means are shown »

Fig. 4 is a partial view on a larger scale, in the one side plate that supplies the impact force and the assembly serving for resetting is shown, but in particular a part of the resetting mechanism carried by this}

Fig. 5 is a similar view of the striker force assembly with the side panels removed to show the view of the typewriter acceleration and stop mechanism to release »

6 shows a further view of this assembly similar to that of FIG. 5, but here the hammer acceleration means is released for driving the hammer so that it strikes the paper against the type drum;

Figure 7 is a perspective view of some acceleration triggers Angle lever and a hammer arrangement in mutually aligned and interlocking arrangement »

Figure 8 is a fragmentary view in one taken along line 8-8 6 laid section to illustrate the separation of the

adjacent

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Adjacent type columns provided means that serve the To prevent printing in one of the columns, if there is an attack in the neighboring column »

9 shows a detailed view, kept on a larger scale, of the provided for driving the paper feed rollers Middle"

Fig. 10 is a detailed view of three plates for guiding the paper between the type drum and the stop force delivering and provide Bück serving assembly «and

Figure 11 is a block diagram of the printer's electronic control circuitry.

Reference now is made to the drawings, and more particularly to Figures 1, 2 and 3, in which one embodiment of the printer is shown, which has a body frame 10 which engages a vertical main partition wall 11 through which a left part of the Machine with the printing unit shown in FIGS. 1 and 2 is separated from a right part which contains the belt drives and the associated mechanisms, which are shown most clearly in FIG are. The construction frame has suitable frame supports η such as the foot 12, and near the front of the machine (Upper right part in Fig. 1) are provided on the frame horizontal extension parts 13, 14 and 15 and a face plate part 16, these parts in Fig. 1 all extending towards the viewer. They carry a side plate 29 and form together a cantilever structure 30 extending from the web partition 11 cantilevered outward in the horizontal direction, like this is shown most clearly in FIG. Another part 17 is provided in the horizontal direction near the upper center of the frame and carries some paper guide plates, which will be discussed later, and this attachment part 17 is also shown in FIG. 2 shown most clearly.

In the vertical wall 11, the lugs 13, I4 and 15 as well as part of the arrangement delimited by the end plate 16, which was referred to above as a self-supporting structure is a

Print type drum

309825/0834

226-291

Printing type drum 20 added and also an inking application roller 22, which is pivotably mounted in such a way that they are brought up to the type drum 20 and moved away from it again can. The end of the type drum 20 visible in Hg. 1 and 2 is supported on a bearing 24 through which the shaft 21 of the Type drum extends through. The inking roller 22 is of a Shaft 23 carried, which is close to the in the viewing direction End is rotatably mounted on an arm 25, which is fixed to a Pivoting lever axis 26 is connected, the ends of which in Fig. 1 ,. 2 and 3 are visible, wherein the near end of the pivot lever axis 26 is mounted in a bearing plate 27 and the distal end in a camp 28. The purpose of this measure will be discussed below ■ be discussed. The bearings 24 and 27 are on the side plate 29 of the self-supporting structure, and the rotary movement of the type drum 20 and the pivoting of the inking roller 22 in the approach on the drum and in moving away from it are triggered by mechanisms on the side shown in Fig. 3 of the vertical Partition wall 11 are provided.

In this embodiment of the printer there are three guide plates 31 »32 and 35 provided. The plates 32 and 33 are through Spacer elements 33d separated from each other, the paper tapes be guided between these plates while the inserted Forms are fed between plate 32 and plate 3I, the latter of which is designed as part of the self-supporting structure 30. These three plates are also shown in FIG. In the illustration of FIG. 2, the assembly which supplies the stop force, as well as the two lower plates 32, are shown and 33 removed, but the two plates are shown in FIG and take the space between the cantilever structure 30 there and the assembly providing the stopper force, indicated generally by the reference numeral 100 in FIG. On consideration the paper guide plate 3I is noted that this plate has two Has openings, namely on the one hand a slot 31a which releases access to the type drum 20, and on the other hand a slot 31b, which allows paper feed rollers such as rollers 40 shown in FIG. 2 to engage the paper that is between the guide plates

3Q982S / 0834

tion plates is guided upwards. A slot 54 is used for manual insertion of forms and extends between the guide plate 31 and the middle guide plate 52. At the mouth, the slot widens because the upper guide plate 31 continues in a curve from the middle guide plate 32 at 31c, so that a Insertion opening is formed into which an operator can enter sales sbe le ge in the manner described below. The upper end of the slot 34 represents the paper exit end and the guide plate 31 is also guided to the outside here, as shown at 31d. The middle paper guide plate 32 ends at the top just below a separating knife 37 provided at the outlet end of the slot, and the lower guide plate 33 leads over to an outlet plate 36 which extends beyond the separating knife 37. The middle guide plate 32 has a recess 32a and the lower guide plate 33 is pierced by openings 33a and 53b, these openings or recesses coinciding with each other after the plates have been installed in opposition to the type drum 20 and the paper feed rollers 40. _t

As can be seen from Fig. 1, a double paper tape 51 and 52 runs from a paper supply roll 50, which over the Bottom portion of the machine and around a curved end 33c of the Guide plate 33 is led around, whereupon sioh these two paper tapes 51 and 52 through the slot between the cantilever structure 30 and back up through the mechanism 100 providing the stopping force, more precisely through the slot between the middle plate 32 and the lower plate 33. The two Belts 51 and 52 are then separated by exit plate 36 separated so that the band 52 is now above the plate 36 extends and is passed under the cutting knife 37. That Belt 51 passes under the exit plate 36 and over a plate 56 carried by the lug I7, whereupon the Tape 51 is finally wound onto a tape reel 53 for on the vertical partition wall 11 a (not shown) bearing is provided. The spool 53 is carried by a shaft 54 which Driven by a belt via a friction slip clutch 55

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"is practiced, to which we will come back in detail. The wave 54 and the coupling 55 are shown in the right part of FIG.

The assembly 100, which is used to generate the stop force and to reset, is in Pig with its components. 1 and shown in FIGS. 4 to 7. This assembly has two side panels like panel 101 in FIGS. 1 and 4, these side panels being spaced apart from one another at a distance substantially equal to the width of the cantilever structure 30 perpendicular to the main partition 11. The two end plates 101 are bolted to an interposed articulation block 105 which, in a modular arrangement, carries a multiplicity of adjacent acceleration and stop mechanisms for the writers. The end plates in this embodiment also carry four solenoid decks, namely two upper decks 137 ¹¹¹¹ C1 two lower decks 138 "which are shown more clearly in FIGS. 5 and 6. These parts are all attached by bracket 144 and 145. attached to the side plates 101. The power springs and angle levers as components of the above-mentioned acceleration and stop mechanisms, which are used to accelerate the actual hammer, are supported by the grooved pivot block 105 in parallel arrangement with the side plates 101. The articulation plate 105 is shown most clearly in FIGS. 5 and 6 and carries half the number of beveling levers on each of its two sides. The block 105, in turn, is carried by bolts 104 which pass through bores 106 on each side of the pivot block. The pivot bracket 105 is recessed at 107 and carries two pivot pins 110 for pivotably mounting the angle levers 111 typical of hammer acceleration arrangements, each of these angle levers serving to accelerate the associated hammer 120. The angle levers each have a first arm 112 which extends into the recessed area 107 of the articulation block so that the ends of the arms 112 interlock without touching one another, as can best be seen in FIG. The angle levers are preferably mounted alternately on two pivot axes 110 for pivoting movements which extend on opposite sides of the pivot block 105, whereby they are arranged in milled grooves provided in the pivot block

309821/0834

are separated from each other or kept at intervals. At the top of the other arm 113 of each is the bell crank an eyelet is provided into which a mainspring 115 is suspended, the provides the force for the write stop. At the outer end are those Springs 115 each suspended from a flexible tab 116 which in turn bolted to a small flange of the pivot bracket 105 is. The spring 115 thus loads the vortex lever 111 for execution a pivoting movement about the pivot pin 110 in the sense of a Raising the outer end of the first arm 112. The outer end each of the arms 112 is formed in the form of an arched foot 112a which against the lower end of an associated hammer part 120 is present. Me mutual alignment of the hammer and his Angle lever β can best be seen from FIG. Each of the angle levers is assigned a hammer, each in a juxtaposition to one of the writing column η of the Tjpentrommel 20 is arranged. the Hammer are all mounted in comb-like guides 122 which are endsei tig supported between the side plates 101, the guides 122 at the ends with dowel pins η are provided in holes 117 are inserted into the side plate 101 (see Fig. 4). the Comb parts 122 have vertical slots which are separated from one another and each serve to support a hammer 120, see above that this can be guided back and forth up and down, as illustrated in FIGS. It's these hammers 120, one of which is provided for each digit that the Write stop as such, when they suddenly release the angle lever 111 an upward acceleration is granted, since the outer ends 112a of the angle lever in this case as a result of the application of the force of the springs 115 pivoted and quickly guided upwards.

The bell crank are usually made by latch arms and 131 in the force-storing position shown in FIGS held down, the mode of action of these arms being similar, while they differ in that the arm 13I is longer than the arm 130. The arms 130 and 131 are connected to the pivot block 105 by a, upper pivot pin I32 or by a lower pivot pin 133

tied together

30982B / 0834

connected, both of which are shown in FIG. On the top trunnion 132, the shorter pawl arms 130 are mounted, while the lower pivot pin I33 carries the longer pawl arms 13I, wherein a storage on the pivot block 105 below the corresponding Arms 112 of the associated angle lever is provided. From Fig. 7 it can be seen that the arm 112 of each angle lever 111 terminates at the outer end with a latch tip II4 on which a hook end 134 of a ratchet arm, for example that of the arm 130 in FIG. 7, engages. So the angle lever is in the lower one Position latched by the latch arm, which is normally through a suitable spring II9 in the course of a pivoting movement into a latching position is burdened.

If a character is to be printed with a specific hammer and with the help of the relevant acceleration devices, so the associated solenoid I37 or I38 is activated the electronic extension system to be discussed below its plunger core is energized downward, as shown in FIGS. 5 and 6, whereby the pawl arm under extension of the spring II9 is led into a release position. The armature of the solenoid is each connected to a forked push rod, as shown at 136 or is shown at 139, so that the locking hook can be disengaged by these rods, which the angle lever in the force-storing Position, hold on. To determine the normal retraction position of the push rod and the solenoid armature is for the upper solenoid deck a screw adjustment I40 is provided and for the lower solenoid deck a screw adjustment 141 »so that these screws the stroke length of the solenoid can be set at which the associated locking arm removes the angle lever from the force-storing η Releases position, namely from the position shown in Figo 5 Angle levers on either side of the block 105 · The solenoids 137 and 138 are carried by tap parts I42 and I43, the outer ends 144 and I45 of which are shown in FIG. 1 and in FIG. These Outside ends are fixed to the webs 101a shown in FIG connected to the side plates 101.

In Fig. 1, 4, 5 and 6 the mechanism is also shown

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through the all angle levers again and again in the energy-storing Position to be tensioned. For this purpose, two swing or Rail parts 154 and 155 are provided, which cause the force storage ehe tion and the most evident in Pig. 4 are shown. For each of these rail parts, a crank arm is provided at the two ends, from those shown on the right-hand side of FIG. 4, the arm 150 and on the left side arm 151Di® arms 150 resp.

151 of the reset rail parts and each on a pivot pin

152 or 153 pivotally mounted at both ends of the plates 101 is supported. The two back ste 11 devices are arranged above the angle lever arms 112 concerned and act on them when the rails are guided downwards. The rail 154 extends between the two arms 150 and 150 goes in one piece into this, while the rail 155 extends between the two arms 15I. The position of these two Rails 154 and 155 with respect to the first arms 112 of the bell crank can be seen clearly from FIG. 5, in which the bell cranks 111 are shown in the clamping position, and from Fig. 6, in which the left angle lever has been released, whereas the right angle lever is still in the clamping position. Ee it should be noted that the arm 112 in the release position of the angle lever in System comes against a fixed stop 102, which the Execution of a further movement dee arms blocked, like this is shown in the left part of FIG. 6, and that the hammer is not so long that it is in this release position of the arm 112 touch the paper with its upper end and this could still rest against the foot 112a with its lower end, so that the Printing process with the help of the inertia of Hammer mass is executed. In the phase of the operational sequence shown in FIG. 6, the hammer is just striking against the paper.

The reset device ^ also includes an extension part each, that in Fig. 4 with the reference numerals 156 and 157, respectively is denoted, each of these extension parts connected to a reset member I60 or I6I j et, as best seen 1 and 4 can be seen. If the back ste 11 links I60 and I6I led down, the rails 154 and 155 get in / n-

309826/0834 ~ ^L1

would lie against the arms 112 of the angle lever and pull them: into the Yerklinkungsstellung down, namely all angle levers for same point in time. The Büek actuators are on their lower ones Ends curved outward and are interconnected by a shaft 164 connected, which is carried by a counter link 165 that is connected to the Pivot point is hinged at 166 on the side plate 101, as shown in Fig. 4, the assembly on the other side plate (not shown) is the same. The counter link 165 has an upward extension I67 with the force of a spring I68 is applied, so "that the shaft I64 is printed vertically upwards. Wave I64 also applies at each end a rotatable i-cam follower I69, which is on the cam area of a / aify provided at the end of a camshaft 171 Cam I70 rolls as soon as this cam rotates. The cam I70 is carried by the shaft 17I on which it is keyed, the shaft 17I by the vertical separation wall 11 of the building frame extends through it. The wave I7I is with Using the drive means shown in Fig. 3 to periodic rotary movements driven, as will be explained in detail below, and at every half revolution of the shaft 17I and the The cam followers on the shaft 164 follow the cam I70 guided down so that they the connecting links I60 and 161 with pull themselves down, causing the rails 154 and 155 to latch of the ends II4 of all angle levers 111 are moved downward in the lower position shown in FIG. 5, as is the case for the right angle lever in the viewing direction also in FIG. 6 is shown. -

However, if a solenoid I37 or I38 is now energized, so the pawl arm in question I30 or I3I is pivoted so that the end II4 of the corresponding bell crank is released, whereupon the foot "112a as a result of the application of the spring force an upward acceleration is given and the hammer 120 the paper 51 and 52 against the print type in the relevant Column of the type drum 20 strikes, as shown in FIG. The spring 123 carried by each of the hammers L20 arrives here-

when in contact with the lowermost guide plate 33 of the paper guides and affects the rebound of the hammer, so that this after does not snap forward a second time against the paper. The turns 124 of the spring 123 give it an increased resilience.

In FIGS. 6 and 8, separating means are shown, by means of which one printing type provided in the one row can be printed the paper is to be prevented if a sign is made in the neighboring row by hitting the paper against the blackened type drum 20 is printed by means of a hammer 120. The flow of this process is best seen in Figure 8, in the shields 127 are shown, which are essentially tangential extend over the underside of the type drum 20 and between the types are arranged in adjacent rows, the rows being designated by the reference numeral 20a in Fig. 8. How out 6 and 8, the shields 127 consist of individual rails, all of which are formed in one piece at both ends Support webs 126 are connected to one another. These webs or ribs 126 are attached to stationary frame parts by screws 128 and 19 secured by suitable means (not shown) are mounted in a relative to the type drum 20 fixed arrangement. The individual shield rail η 127 are thus in a radial Position arranged directly in front of the type areas in the columns of the type drum 20. So is with regard to the representation of Fig. 8, note, for example, that the paper 52 is against each of the shield bars 127 and that the distances between these rails are such that the paper 52 protrudes from the drum everywhere, except only the one point where it is actually struck against the drum by a hammer 120. From Pig. 8 is also the way in which the springs 123 are fastened in grooves on the side surfaces the hammer 120 can be seen in which they are firmly soldered.

As a further embodiment the release agent for Prevention of undesired printing processes in columns that are adjacent to the respectively posted columns can instead of the rails 12 * 7 see η also be a number of fine spring wires yp rye, whereby these

Spring wires

10 * ni 2 B / Ο Ο '; H

BATH ORIGINAL

! spring wire? tig end is secured in hole punches are · ^1, are provided die'in, in turn, 'angett with their outer ends to the Rahmehteiien 18 and 19 ^ ächi' by the screws 128 si'nd · With 'of this embodiment can be.' achieve similar results, but it is not shown in the drawings. ; ^:

The drive mechanism will now be discussed in more detail will. The drive means for triggering the above-described mechanical gates are mostly included in Fig. J Drawings shown, this drive mechanism includes an electric motor having a number of belts and pulleys drives through which it performs mechanical operations, most of which require a considerable amount of power require, for example, the maintenance of constant rotary motion the! type drum, the resetting of the individual writing hammer mechanisms into the clamping position for renewed energy storage in the speakers 115 who provide the power for the typing stroke, and the timely transport of the paper band ε including the movement of the casserole. The 'further required movements of mechanical' parts are generally carried out by triggered individual solenoids, some of which have already been mentioned.

. The motor M shown in Fig. 3, which is carried by a plate (not shown) which is mounted in sprue bores in the frame, drives a lower end lill pulley 180 which in turn drives a main drive belt 181. The belt 181 is passed around a pulley 182 which drives the type drum shaft 21 and is arranged on the opposite side of the partition wall as the type drum. The main drive sriemeη 181 is also passed around a normally free running lower pulley of a coupling arrangement 183, which is normally disengaged from the coupling engagement, whereupon the belt runs back to the belt pulley 180 provided on the motor shaft. Since the motor always rotating, once the's First is put into operation, the T / EL3E 21 driven at constant rotational movements, so that the movement der'Typentrommel 20 is not unterbro chen

, -..-. 30982S / 0S34

BATH ORIGINAL

chen and that one side of the clutch 18 $ is constantly turns. The upper pulley 184 of the clutch 183 is normally still. When the clutch is engaged, the latter is activated Pulley 184 transmits the drive force to the lower clutch pulley, whereupon it acts as one for the return mechanism provided drive belt 185 drives on its puncture will be returned in the following.

On the pulley 18 2, which drives the type drum shaft 21, a code disk 186 is screwed, which is in the viewing direction of FIG. 3 above the pulley 182. This disk has along its outer edge a number of small index signal holes 187 and also a return signal hole 188 which is provided in the opposite direction to one of the outer index holes 187 in the radial direction. Such perforated disk arrangements are known from the prior art and are used to encode the type drum position. Each of the index holes 187 of the outer single series is aligned with one of the type lines on the surface of the type drum 20, the double hole pattern, which consists of an index hole and the reset hole 188, however, coinciding with an arbitrarily selected first type line of the drum. Light sources (not shown) are provided behind the code disk 186, which supply two light points, namely one opposite a photoelectric cell 19I and the other opposite a photoelectric cell 192. When the disk 186 rotates, the index signal cell I9I is replaced by the one in Pig The window JIa shown in FIG. 2 is supplied with a light pulse every time a new line of type is guided in the direction of escape of the pen 120 due to the movement of the type drum. If, in addition, the line led in the alignment is the first type line, the reset signal -photo cell I92 sends an impulse. The two photoelectric cells are connected to an electronic circuit board I93 which carries components of the control circuit, through which the position of the drum is coded with the aid of the pulses of the photoelectric cells and the output of which through a cable I94 other components of the electronic control system

309825/0834

BATH ORIGINAL

systems, which will be described below. The photoelectric cells I9I and 192 are of a Support structure I95 supported at the right end in the viewing direction in a hinge arrangement, to the one a fixed support I96, through which a pivot sticks out, the ends of which are designated by the reference numeral 197 in Fig. 3. The support structure 195 can therefore be folded up around the pin 197 are pivoted, at the same time its left end of the Shaft 21 is lifted off, so that the photo-electrical system then exposed for maintenance and the code disk 186 removed can.

laugh each time a line is entered on one in the Slot 54 introduced business form and / or on the paper tapes 51 and 52 must position the paper in the next line printing position be transported further and must be stored again in the springs 115 of the write stop mechanism, so that the the following line of characters can be printed out. These operations are dependent on corresponding commands of the electronic control system running. As soon as the electronic Control system has determined that a line of characters has been printed out, it sends a pulse to actuate a solenoid 201 to guide the left in the viewing direction of FIG. 3 End of an arm 202, whereby the right end of this arm 202 after out above and a pawl 203 from one of the catches on the outer edge a collar 204 is disengaged. Sometimes the Pawl 203 held by the right end of the arm 202 in engagement with one of the detents on the collar 204 so that this is not can turn. The clutch itself is not to be described in detail, since it is of conventional construction, insofar as it is here a coupling of the type with one inside the collar 204 envisaged Tlmhüllspulenfeder loosely around two inside the clutch connected to the respective one of the pulleys The drums remain lying around as long as the pawl 203 engages the collar 204. However, the collar becomes a twisting motion released, the spring winds up on the drums and causes

3Q982S / 0834

226U291

acts that the lower pulley of the clutch 183 drives the upper pulley 184 until the pawl 203 again engages the next baste, whereupon the spring unwinds again and releases the clutch. The clutch is designed so that the upper pulley 184 is rotated each time the pawl is disengaged from one of the notches of the collar 204 until it engages in the next notch by so much that the pulley 206 on the shaft 171 over the belt 185 to one partial revolution is driven over 180 degrees. Instead of the above-described spring clutch 18 3, a periodically operating clutch of other types can of course also be provided, as there are in the most varied of designs.

The belt pulley 2Q6 is keyed onto the shaft I71 of the return mechanism provided for the printing unit, as has already been mentioned in connection with FIG. The shaft 171 is rotated by the drive and this rotational movement is also transmitted to an associated belt pulley, via which a paper feed belt 207 is driven. The rotational movement of the shaft I7I also drives a pulley 208 and via this a belt 209, which in turn ^{drives the pulley 55 and} the shaft 54, whereby the paper feed reel 53 is rotated. The winding spool wire intermittently whenever the reset mechanism of the printer is actuated, and in this context it should be remembered that an exercise slip clutch is provided for the pulley 55 so that the paper winding spool 53 only moves so far rotates so that the loose length of the tape 51 is taken up.

The belt 207 is also shown in FIG. 9, in which it si oh for a detail of the mechanism for the rotary movement of the Paper feed rollers 40 act, through which the paper to the next Character print line is transported further. To this direction of the gate includes a bearing support 211 on which a pulley 212 shown in Fig. 3 as well as in Fig. 9 is mounted, the one Drive cam 210, which is shown in the lower part of FIG. 9 by a dashed line Line is indicated. It should be remembered that the belt 207 is only driven when the return mechanism

3Q982S / 0834

mus in the off is advised to be operated, so that the squat 210 with each The system's reset cycle only executes half a revolution. Every time the belt 207 i & Hg »9 half the Hboken 210 © ine Rotates further revolution, an IToekenna hollow impeller 213 is in the viewing direction 9 in the plane or in the direction of view the Hg «. 3 up and near to the right. Bas crouched trailer wheel 213 is mounted on a support structure 214, the one has upper extension 215, as this, both in Fig. 3 and in Fig. 9 is shown. As can also be seen from FIG. 9, the Support structure 214 and extension 215 carried by three pins, designated by reference numerals 216 and 217, respectively, - the both pins 216 through slots in the lower end of the support structure and the pin 217 through a slot in the elongated Extension of the support structure * One in that shown in FIG Way at the upper end of the extension 215 arranged spring 218 is between the pin 217 and a pouch beveled at the top 219 suspended from the upper part of the support structure, so that the cam follower wheel 213 always downwards against the by the spring tension Cam 210 is pressed. The paper feed rollers 40 and 40a become carried by two shafts, one of these shafts extending through the cantilever structure 30, the EoIIeK. 40 and denoted by the reference number 221 in FIG. 2 and in FIG is. The other pair of rollers 40a is accommodated in the assembly which supplies the stop force and serves for stooping is carried by shaft 222 as shown in FIGS is. The paper is usually between the hells for transport 40a and 40 pinched. At the ends of shafts 221 and 222 are Ratchet wheels 225 and 226 are provided, on which two pawls 227 and 228 engage periodically. This is the case when the cam follower 213 in the viewing direction of FIG. 9 from the squatting position 210 is guided upwards. The pawls are pressed against the ratchet wheels by springs 229 or 230, which ensures that that they attack them. The pawl 227 is on the bottom of the slider 214, the pawl 228, however, on the top of the slider so that they do not interfere with each other Maintaining constant distances between the machines

printed

30982S / 083 k

A pointed star wheel 231 is provided on the printed character lines which is engaged by a latch 232 carried by an arm 233 which is pivotably mounted at its upper end and is acted upon by the force of a spring 234 at its lower end. Will If the pawls 227 and 228 are withdrawn from the ratchet wheels 225 and 226, the pointed star wheel 231 is therefore removed from the latching pawl 232 advanced exactly. Some of the structural details shown in FIG. 9 The parts shown are also shown in FIG.

Solenoid 201 is only energized for a brief moment, so that before completing a quarter turn of the coupling sleeve 204 falls off again, whereupon the pawl 203 into the next notch engages, and at this point in time the paper transport is complete and a new force is stored in the hammer acceleration mechanisms takes place because the angle lever is brought back into the clamping position and the springs 115 in which the stop force is supplied and tightened again to reset the assembly are. Due to the falling of the solenoid 201, the arm 202 may die Move pawl 203 back into the next notch in collar 204, thereby releasing the wrapping spring which, as mentioned, is located within the collar 204 so that the clutch is disengaged and the pulley 184 is released to idle on the shaft. The belts 185, 207 and 209 are therefore no longer driven and the part of the mechanism used for resetting and paper transport now remains in the idle state until another Character line has been printed out and requires these devices again will.

In Fig. 3 below is a solenoid actuator

237 is shown, whose Wirkweiee consists in the shaft 23 and the Bring the porous ink roller 22 (Pig. 1 and 2) up to the type drum 20. The inking roller 22 is carried by the shaft 23, the end of which mounted in arm 238 in the manner shown in FIG. This Arm performs a tilting movement around the shaft 26 and keeps the porous ink roller 22 away from the type drum 20 when the Power is off. In the withdrawn position, the arm lies

238 against a stop 239, which is part of the support structure 240

309825/083

for the solenoid 237 is provided. This solenoid is energized as soon as there is a power supply to the printer, regardless of whether or not printing is in progress, and therefore the armature 241 is retracted into the solenoid 237, whereby the shaft 23 is brought closer to the type drum, so that the roller 22 then continuously blackens the type drum.

The shaft. 221, which carries the forward thrust rollers 40, is supported at two points by two arms, which are indicated by dashed lines in FIG. 1 and FIG. 9. These arms are identified by the reference numerals 243 and 244. The arms 243 and 244 are each hinged to the frame structure with a central part, in particular from FIG. 1 it can be seen that the left end of the arm; 243 carries the feed roller shaft 221, while the right end of the arm 243 is connected to the plunger of a switch 245, the arrangement of which within the cantilevered structure 30 is indicated in broken lines. When this switch is pushed down by hand by depressing a pushbutton in a keypad (not shown), the right end of the arm 243 is thereby moved downwards, whereby the left end of the arm is inclined upwards, so that the feed rollers 40 of the in Feed rollers 40a arranged in a fixed position, which are carried by the shaft 222 within the subassembly 100 which supplies the stop force and serves to "reset". At the same time, a circuit is also closed, which prevents printing as long as the rollers are in the open position, which will be explained in more detail below. Another switch 246, shown in Fig. 3, is connected to another pushbutton on the keyboard and is used to operate the paper feed and the return mechanism by hand by applying pulses to the solenoid 201 to disengage the pawl 203 '. These two pushbuttons allow the operator to selectively open the feed rollers, so that a form can then be inserted and / or the paper can be transported to a new print line. When inserting a foreulars waiä the * * '' are inserted so far into the slot, d * like the beam of light from a light source 247 to a photoelectric cell 247 (ilg. 2) is interrupted, because "if the vein

3Q982S / 0I34

The output of the photocell 247 indicates that the printer is in operation prevented by the printer. A sensor of this type can be used to avoid incorrect printing, which would otherwise lead to would be expected if the operator does not complete the form introduces.

The electronic control circuit will now be described will. The mechanical characteristics of the printer are so linked with the characteristics of the electronic control that in cooperation a combined system is formed in which the electronic Part of a data processing unit, which is included in the overall system, supplied character information and write commands that are constantly changing with the rotational position of the bructype drum be compared for agreement. If the coincidence occurs in one or more type columns of the drum, then in all enabled these columns to activate the typewriter for simultaneous printing of the relevant character. Ss is provided that with one revolution of the type drum a great line of characters is printed.

Reference is now made to the block diagram of FIG. II, assuming that the printer has character information from a data processing unit CPU, which can also understand a computer. The data processing unit is with the electronic control circuit according to the invention by a Cable 6O connected, in this case, for example, six parallel Input lines includes that with a data lock circuit 6l and are connected to a write command detector 71. In the data lock circuit go at the same time se oh β characters in parallel and it converts each of the characters for serial readout via a line 6l a, which leads to a data circuit 63 that is expensive. The data control circuit in turn routes the characters over a line 63a a storage register 65 to. This register has a storage capacity of sound 132 bits, namely two and two 6-bit lines.

Hi scanning of these bits and digits before η by the circuits 61 and 63 for reading into the% ieherregieier 65 is carried out by a xapml "finer * tor 64 t" kt "is expensive, which in advance has a

management

309826/0634

^BAD OniGlHAL

Line 64a is controlled through which it is sent to the data processing unit is connected so that it delivers timing pulses that in a manner known per se with the data processing unit originating data bits are synchronized. Are in your storage register all I52 bits are stored, corresponding to the 22 type columns of the writing drum, they are followed by a write command s character that appears in the 23rd character position of the message, and although the type drum does not have 25 columns, can think of this write command as a process during a 23rd count think in the context of a counting system that will be discussed 2x1. The 22 characters are stored in the storage register, whereas however the write command as the twenty-third from the data processing unit transmitted character is not saved in this way »

As soon as the 22 print characters are entered in the memory register the contents of this register can be circulated in a circular loop 66. While these bits are from the Memory register 65 are read out, the return is carried out through the circular path 66a of the loop into the data control circuit 63, from which it enters the line 63a and through this into the storage register be returned. The consecutive bits that are in this Circulate in the loop manner, however, are also fed to the series input 62 of the data latch circuit 61, where they are in the bit positions the data lock 6l are locked to six bits in parallel, so that they are currently on the parallel output lines can be read out into a coincidence detector 69. In the coincidence detector they are compared with the outputs on the six lines 68 from a character counter 72 appear. Of the Character counter 72 counts the mechanical rotary positions of the type drum 20, which contains 40 type lines and 22 type columns, like this was already mentioned above. The character counter 72 delivers the lines 68 forty binary-coded representations appearing one after the other in the various lines of the type drum appearing characters.

It should be remembered that the type drum is at

309825/08 3 4

their rotational movement on the shaft 21 shown in Fig. 3 rotates a code disc 186 which has two holes at a radial distance, the outer holes are arranged in a circular row so that they coincide with the drum lines, and these holes with a photocell I9I cooperate to generate index pulses which indicate the arrival of each type line when the port moves the pane. There is a radially further inward Looh 188 provided, which always cooperates with a photocell 192 to generate a reset pulse when the type drum 20 and the code disk 186 have made a full revolution and when the first line is started again. These impulses are cut off and amplified by an index generator I98 and a back ste 11 ge norator 199, both in Pig. 11, but are actually arranged on the circuit board I93 in FIG. The system behaves so that the character counter is always reset by a pulse on line 199 ^a when the drum reaches the start position, that the first type of line on which the character counter 72 in response to the index pulses appearing on the line 198a , delivers successive binary outputs on the lines 68, which indicate the current position of the type drum 20. As already mentioned, the drum has 40 type lines, the types in all 22 columns being the same for each line.

Each output on lines 68 thus indicates which Characters corresponding to the respective rotational position of the type drum 20 can be printed, and the output of the data η lock 61 on the lines 67 on the other hand indicate which character at a particular moment from the by clock control from the memory register 65 through the circulation loop 66 issued seeds requested will.

It must be kept in mind that the output from the storage register 65 is so much faster than that Rotation of the type drum 1 ^ 20 that the entire content of the memory register 65, the sequence of 22 characters contained therein, in which

ribbon

3Q982S / 0834

Loop 66 can revolve before the line position of the drum 20 has changed noticeably, since the revolving clock frequency is 66 kilohertz. The storage register therefore outputs every twenty-two characters in succession, column by column, while each group of 6 bits is compared with the character represented by the output on lines 68, namely the character which can be printed according to the respective position of the drum 20. The character to be printed in the first column is read out on lines 67 * then the next 6 bits are read out on these lines, which represent the character that is to be printed in the second column, and so on up to the 22nd character. The data control circuit 63 also serves to prevent the contents of the memory register from circulating until the type drum has mechanically moved a certain line of characters into the writing position, so that the drum does not assume a rotational position between the intended stop positions.

In order to avoid unnecessary delays, the structure of the system according to the invention is such that it does not matter which type line of the drum is ready for printing when the data circulation for comparison purposes begins in the loop 66 , in other words when the circulation of the stored bits from the register 65 .Insertion, the drum need not be in the write position alignment. If it is determined by the index generator 198 that the type drum 20 is mechanically aligned in a certain writing position and is ready for printing a character in one of its lines, the index generator 198 sends a pulse on the line 198b to set the program control flip-flop and for its transfer from a return position in which it prevents the contents of the memory register 65 from circulating, into a set state in which it initiates the circulation of the message units contained in the memory register. The data routing circuit 63 contains data routing gates which are controlled according to their respective state by the output on the line 70a. When the program control flip-flop 70 is in the reset state, the data routing circuit is activated by a corresponding signal state on line 70a to receive new data from the

Jate processing unit b

309825 / 0-8 34

Data processing unit CPU operated via the line 6la received from the data lock circuit 61, so it is the Input from the data processing cable 60 is. Leaves the index generator I98 the program control plip-flop, however, in the presented State, the output is reversed to stand up the line 70a around and the data routing circuit 63 is for reception further data on the input line 6la blocked to instead now the data from the memory register 65 clockwise into the To give round loop 66-66a. A data circulation thus begins in the loop, and this data also goes to the series input 62 of the data lock 61 and appear in parallel on the lines 67 leading to the coincidence circuit 69.

Groups of 6 bits, each of which is read serially from the memory register 65, appear on the lines 67 Represent characters, and at the same time appears on the to the coincidence detector 69 leading lines 68 a binary indication of the momentary rotation of the drum 20. The coincidence detector then determines whether one of the characters read one after the other into lines 67 corresponds to the current position of the type drum, as indicated on lines 68. If a character appearing on lines 67 corresponds to the current one Drum position, the hammer drive logic 79 is on the line 69a supplied a coincidence signal, which indicates that the corresponding characters in this position of the type drum should be printed. In this context it should be noted again that the rotary movement of the type drum 20 compared to Speed of the character circulation from the memory register 65 to the lines 67 runs so slowly that all 22 columns can be compared for a match before the type drum 20 can move appreciably from their position. Consequently all 22 characters are compared with one and the same drum position information, appearing on lines 68 is output from memory register 65 onto lines 67 before the Has moved the type drum from the position in which a type line is currently aligned.

3Ü9825 / 0834

- 51 -

The memory register message contains 22 characters corresponding to the 22 character positions to be printed in the 22 columns of the [Type Drum ". The memory register outputs these characters in sequence, starting with the character to be printed in the first column, followed by that in the second Column, characters to be printed follows, the one to be printed in the third column, etc., Ms to column 22. The memory register does not reveal which bits correspond to the various characters, and the UmI gives up the flow of 132 bits from the memory register Loop 66 must therefore be subdivided into 6-bit character groups η. For this purpose, a byte counter 73 is provided which receives a pulse for each bit circulating through the data routing circuit 65 at the clock frequency Line 63b is fed in. The byte counter counts 6 of these pulses and then supplies one after each passage of a 6-bit character Output on lines 73a and 73b. The output on line 73 ^a is used for switching a port Spaltenabtastzählers 75>, into which column a circulating in the loop 66 characters must be arranged tracked. The output on the line 73b after each 6-bit revolution enables the coincidence detector momentarily to output an output on the line 69a if the character just received corresponds to the rotational position of the type drum 20. The column scan counter 75 is incremented once in accordance with the byte counter 73 for every six characters circulating in the memory register loop 66, so that the column scan counter 75, after outputting the first 6-bit character through the circulating loop 66, in turn sends a binary indication via the lines 76 which indicates that this saved character is the character to be printed in the first column. The output on lines 76 is decoded by a column decoder 77, which then provides an output on one core of 22-core cable 77a, and since this is the first output, this brings a pop-pop in the hammer drive logic into an operational state, which corresponds to the first column. The hammer drive logic 79 contains 22 such flip-plops, one for each column.

309825/0834

- ■ 32 -

When column 1 is read out of the memory register, the first flip-flop in the hammer drive logic 79 is brought into the operational state via the first output wire of the column end encode rs 77 in the cable 77a. If the character output from the memory register on lines 67 matches the character in the current drum position, as indicated by the output on lines 68, a coincidence signal appears on line 69a, causing the flip-flop of the first column is set in the hammer drive logic 79. After these 6 bits have been checked for coincidence, the byte counter 73 delivers the next output on the line 73a and advances the column scan counter 75 to the second print column, whereby the second wire in the cable 77a is put into operation, via which the flip- Flop of the second column in the hammer drive logic 79 is brought into the operational state. The output of the byte counter 73 on the line 73b enables the coincidence detector to decide whether there is a match between the character to be printed in the second column, which appears on the lines 67, and the current mechanical position of the character counter 72 in the encryption on the lines 68. If there is again a match, the second flip-flop in the hammer drive logic 79 is also set. In this way, all 22 characters read out from the memory register 65, which represent the 22-character message to be printed in the columns, are successively compared with the same instantaneous rotational position of the type drum 20 as they are by the output of the character counter circuit 72 on the lines 68 is displayed. All 22 characters are compared so quickly that you can think of the drum ρ rak ti sch stationary during this process, even though it is actually rotating all the time. It is assumed for example, the instantaneous rotation position of the! Type Drum _ge i such that a code for the letter Q appears on lines 68th As the contents of the memory register 65 circulate, the characters to be printed in all 22 columns are successively compared with the letter Q which appears on the lines 68. For example, if the first, third, and twelfth columns match

309825/0834

If agreement is established, the first, third and twelfth flip-flop of the hammer drive logic has been set and the 22 wires in the cable 79a, which leads to the printer solenoids 137 and 138 shown in FIGS. 5 and 6, are either ready for operation or not ready for operation, which in each case depends on whether the relevant flip-flops contained in the hammer drive logic 79 are set. Although the flip-flops have all been set either as a result of the scanning of the characters circulating in loop 66. are or have not been set, a printing process has not yet taken place. Rather, the pushing process only takes place, in each case according to which of the flip-flops are set in the hammer drive logic 79, if then the hammer-free logic 78 would be actuated to ignite those solenoids that are assigned to the set flip-flops. The flip-flops in hammer logic 79 are thus placed in sequence or remain unset, but all set flip-flops are only ignited at the same time when all characters circulating from the memory register have been checked for agreement.

The firing of the solenoids 137 and I38 by the hammer release circuit 78 takes place in the following way: As already mentioned, the byte counter is incremented after each cycle of 6 bits, so that an increment occurs when the last bit from the memory register is Circular loop 66 runs through, ie the 132nd bit stored in this. This bit causes the byte counter to provide an output on line 73a by which the column scan counter 75 is incremented to its last and highest count, namely the count for a column 23, although only 22 columns are to be printed out. This counting of a column 23 goes on the lines 76 to the column decoder r 77, which then supplies an output on the line 77b. This edition has several functions. First of all, this switches the sampling counter 75 back to counting column 1. Secondly, the hammer-free circuit 73 is thereby activated for exciting those printer solenoids 137 or I38 via the cable 79a which contain the 22 contained in the memory register as a result of the comparison that has just taken place

309825 / 083A

hold characters correspond to the current drum position set flip-plop s in the hammer drive logic. In addition, however, the signal for column 2J is fed to the data routing circuit 63 in order to block the circulation of the memory register contents until the character counter drum has moved into the next rotation position and a new index generator pulse appears on the line 198c.

As soon as the type drum 20 has rotated into a new type line position, a new output pulse appears on the line 198c, whereby the data routing circuit 63 for resumption the circulation of the contents of the memory register is put into operation, so that the stored characters with the next print line on the drum 20 can be compared. It comes to the expiration again of the described coincidence process, the system taking the entire Going through the contents of the memory register and each of the 22 characters Compare column by column with the new rotation position of the type drum. As a result, some of the flip-flops in the Hammer drive logic can be set by appropriate coincidences. The index generator also has when the type drum arrives 20 in the new switching position on line 198c an output delivered by the hammer release circuit 78 reset was, while at the same time also the 22 flip-flop in the hammer drive logic were reset what the preparation serves the new character comparison sequence.

It has already been mentioned that it is not necessary to arrive the type drum 20 in the rotational position of the first Wait for the print type line, but that the system will instead use the comparison of characters in the line taken by the type drum Rotation position begins. However, it must be stated when all 40 type lines are compared with the contents of the memory register because after the comparison of 40 lines has taken place, all types on the drum have been identified by the system checks whether they are suitable for the respective printing process. So if the program control flip-flop 70 first from the back s te 11 changes to the set state in which the memory

che registers

309825/0834

cherregister 65 begins to circulate its contents for the first time, the program control circuit 70 provides an output on line 70b by which a line counter 80 is reset to the first count will. After all comparisons have been made and the drum has reached a new printing mark η position, the line counter is 80 through the output of the index generator on the line 198d advanced to the next digit. A detector 81 provides the Completion of fortieth count stuck "when on line 77b the signal of the 23rd column appears, which means that the drum has meanwhile been in operation since the start of the comparison of the contents of the memory register 65 has carried out a full revolution, so that all message data must now be completely printed out. If this happens, an output appears on line 81a to reset the program control flip-flop 70, causing the system for the input of new data on the cable 60 from the data processing unit is prepared. In this way, the data routing circuit brought back into a state in which it receives new data from the data processing unit CPU as soon as it is over the line 6la are supplied serially from the data lock 6l. Upon resetting the program control 70, an exit will also appear on lines 70d and 70o, causing the column scan counter 75 and the end of column encoder 77 can be reset. These circuits only become functional again when the program control flip-flop 70 is set again, which means that again a memory register content for comparison with the current one Position of the type drum revolves, as explained above. Appears on the to the write command detector 71 leading data processing cable 60 a write command signal, so this delivers an output on the line 71a »through which the Flip-flop 70 becomes functional in order to be subsequently set by the next index pulse on line 198b.

When forty lines have been counted by the line counter 80 and the end detector 81 has determined the fortieth count, which means that of the 22 characters contained in the memory register 65 at this point in time, a complete print line is produced.

- ti gge s te lit

3Q982S / 083 4

tigge, an end signal appears on line 81b, and it is this signal by which the solenoid 201 shown in FIG revolution of the shaft will be reset 171, while by the rotational movement of the cam 210 shown in Figo 9 is triggered paper feed in the printer. The engagement of the clutch 184 is controlled by a control circuit 82, to which a line 82a is associated which is connected to a manual feed switch 246, which is shown in Fig. 3 and which can be used to set the writing hammers and the paper transport to the next Line to trigger manually. When the system is printing, an output of the program control flip-flop 70 on line 70e prevents a transport release by means of the control circuit 82 so that the operator cannot inadvertently trigger the paper advance by hand, which would interfere with the operation of the printer. The photocell sensor 247, also shown in FIG. 2, prevents the program control flip-flop 70 from setting if a form is inserted into the slot 34 at an angle or not completely.

If these locking signals are omitted, the printer will reset the Hammers as well as for transporting the paper tapes 51 and 52 operated, possibly also for transporting the inserted into the slot 34 Forms.

The embodiments shown in the drawings are not to be construed in a limiting sense of the invention, since changes can be made to this in the framework fall of the invention.

m ; - '£ ut ■ ht

3U9B2S / Q834

Claims (1)

Claims λ \ High-speed printer system for printing coded educational messages / from an electronic data processing unit, which is a printer of the type in which a type drum is provided that is moved by a motor in a constant rotary motion past a stop point, the type drum several types arranged in side-by-side juxtaposition. has similar type columns and this printer includes means for coding signals which represent each printable type line position of the drum, characterized by the combination [aj of a mechanism (ill, 115) provided separately in comparison to each column of the drum (20) for the writing hammer acceleration and for triggering the writing hammer stop, [b] one provided for each of these mechanisms (ill, 115), electrically disengageable and releasably holding the relevant mechanism (ill, 115) in a force s Retaining position actuatable pawl (130, I3I), [c] for coupling the drive action of the motor (M) in the sense of a return of all mechanisms (ill, II5) provided for writing hammer acceleration into the force-storing latching position actuatable return means (154, 155)>[<*] means (40, 40a) and [e] operable at each actuation of the return means (154> 155) for paper transport between the writing hammers (120) and the drum (20) and [e] one in response to a match between coded characters in one Message und.codierten Typentrommelste1lungssignalen for disengaging the pawls (130, IJl) of mechanisms (Ill, 115) at the matching recording type drum locations and for printing the relevant characters on the paper can be ta bigbaren electronic actuator, this control means in response to the termination of a over the printable type lines leading rotation of the drum (20) to start up the Rüc kstellmittel (154> 1 ^: 55) and the means provided for the paper transport (40, 40a) can be actuated. Z. high-speed printer system according to claim 1, characterized in that the electronic control means see a coincidence detector (69) einbef-r.il ft, furn ^ r a storage uhcjrmi t bwl (65) for storing and repeating JU a 825/0834 BATH ORIGINAL, fetched return of several characters of an encoded message, which correspond to the columns of the drum (20) to be printed out in response to the arrival of a drum line in the writing position to actuate the one used to return the characters Store before means s (65) to return the message characters in sequence for each column in the line to be printed with simultaneous comparison with the one representing this drum line encoded characters using the Kbinzidenzde tektors (69) operable means and one for counting the columns in the comparison operable and responsive to the count of the last column to be printed to disable the return of the message characters until the next line of drum is inserted into the writing position actuatable means. 3. high-speed printer sy star according to claim 2, characterized in that the electronic control means further comprises means (80) for counting the drum lines when they appear in the writing position, starting with the stored during the first return line Message character appearing, and one in response to the counting of all printable lines provided on the drum (20) by the means used for counting the lines (80) for triggering an actuation of the resetting means (154, 155) and the means (40, 40a) serving for paper transport which can be actuated Means (81) includes. 4. tendon 11 printer system according to claim 2, characterized in that the electronic control means incorporates a message data system, to which the storage center 1 (65) and a data routing means (63) for receiving new message data and entering it into the Storage means (65) include, this new data being a write command include, and also a response to this write command to trigger an actuation of the Datenlei tmittel s (63) for Returning the stored data to the exclusion of additional new data, actuatable means (70). 5. tendon lid prints r system according to claim 1, characterized in that the printer includes a mounting frame (lo) carrying the motor (M) and the rotating type drum (20), whereby the paper transport 309625 / Q834 BATH ORIGINAL Transport-serving means (40, 40a) a paper guide plate (31) provided with openings (31a, 31b) near the type drum (2θ), the printer furthermore being supported by a support means (101, 105) attached to the mounting frame (10) ) carried and the restoring means (154, 155), the mechanisms (ill, 115 »120) serving to bring about the acceleration and the stop, as well as the pawls (130, I3I), the stop force delivering and the restoring arrangement (lOO) engages, the mechanisms (III, 115, 120) being arranged in operative connection at the stop point on the side of the plate (31) provided with openings (31a, 31b) opposite the type drum (2θ) Bending arrangement (100) as part of each of the mechanisms (ill, 115 »12θ) a hammer (Ι2θ) arranged in opposition to a corresponding column of the type drum (2θ), the hammers (Ι2θ) to be g guide means (122) which carry freely back and forth movements on the type drum (20) in radial sighting and each an angle lever (ill) with a first arm ( 112) and engages with a second arm (II3) connected to a mainspring (115) loading the first arm (112) against the hammer (120), the angle levers (ill) at the intersection of their arms (112, 113) on the for the arrangement (100) provided support means (101, 105) are articulated, the pawls (I30, I31) each connected to one of the angle levers (ill), articulated to the support means (101, I05) of the arrangement (100) and one to latch the one of the arms (112, II3) into an arm having a hook part (134) suitable for holding the first arm (112) in a position withdrawn from the hammer (120) and being connected to this for control by the control means and to verse pushing the pin of the respective pawl (130 ». 131) and to disengage its hook part (134) from the position of the 3 attack on the arm (112) of the relevant YiTinkelbebels (ill) actuating-Lare electromechanical means (137> 13B) are provided. Fast cxu cker system according to claim 5, characterized in that the restoring means (154 »155) are designed as rockers which rieh 309826/0834 BATH ORIGINAL extend over all angle levers (131) and in one of the positions of one of the arms (112, 113) latched by the hook parts (134) of the arms of the pawls (130th IJl) during displacement to move and return the arms (112) the angle lever (ill) are arranged to rest against one arm (112) of the relevant Yftnkelhebels (ill) suitable position, with a reset shaft mounted on the support means (101, 105) of the arrangement (100) and a cam part (170) (171), a (L70) for moving the rockers (l54> 155) ^w ith this connected Ko during a rotational movement of the cam member el; enna chliau forteil (169) and depending on the electronic control means for coupling the return shaft (171) for transmitting the rotational movement of the motor (Μ) actuatable coupling means (I84) are provided. High-speed printer system according to claim b, characterized in that. ^: the support means (301, 305) of the arrangement (lOü) encompasses two oppositely arranged at a distance from each other clay plates (lOl), in which bearings for the reset shaft (171) extending through it are provided, with between them Side plates (101) an articulation block (105) carrying the guide means (122) for the hammers (120) is provided, the articulation block (105) extending from the type drum (20) and from the guide means (122) for the hammers (l20 ) and pivot pin (HO) for the storage of the angle lever (ill) ίη an alternately from opposite directions interlocking against the hammer (l20) inwardly extending arrangement of the first arms (112) of the angle lever (ill) near the PUh tion ami ttel (122), the hammers (120) extending through the guide means (122) and being provided between the first arms (112) and the associated columns of the type drum (20) and wherein the Anlenblook (105) further pivot pins (132, 133) for mounting the arms of the pawls (130, I3I) in the alignment in each case on the arm (112) of the associated angle lever β (ill). 8. Quickly print rsyetem according to Anepruch 7, characterized in that 30982 8/083 4 ■ ^ ^{0 Ofiig /} ^ • -4L- 2260231 the electromechanical means (157 »138) encompass solenoids which each have a plunger core (13b, 139) connected to the arm of one of the pawls (130-131) for moving it out of the latching position, the support means (l01 _r 105) of the arrangement (IQO) encompasses a plurality of solenoid decks (142, 143}, which extend between the facing sides of the side plates (lOl) of the arrangement (lOO) providing the stopping force and serving for resetting and are carried by these » nnä whereby the plunger cores (136, I39) of the solenoids (137, 138) attack the arms of the relevant pawls (I30, 131) mounted on the pivot block (l05). 9 * high-speed printer system according to claim 8, characterized in that at least two solenoid decks (14 ² , 143) are mounted on each of the facing sides of the side plates (lOl), the solenoid deoxes (I42, 143) on each side the solenoids ( 137, IJS) in a stacked, staggered arrangement. 10 «high-speed printer system according to claim 5> characterized in that the hammer (12O) each in the form of a-in parallel arrangement to all other hammers (12O) and in comparison to one Type gaps of the type drum (2ü) are formed by the guide means (122) supported body, each of the hammers (12O) in one in the Au ski ink was on the corresponding angle lever (ill) at Resting on the first arm (112) does not lead to touching the through the plate guide (31> 32, 53} extending paper (51, 52) is formed of sufficient length and with one only at violently striking the first arm (112) against the hammer (120) does not result in the hammer (120) being held in either of the Paper (5I, 52) detached 3 part actuated impact spring (123) is provided. 11. High-speed printer system according to claim 10, characterized in that the impact spring (l25) is designed in the form of a spring wire which extends through the hammer ¹ (l20) and beyond this and against the intended for the paper (51 »52) Plate guide (31, yi, 53),. Gekriinait; isii. _{r,. (} where the spring wire is used in the case of the dna Attacks 3 nights 3 8 2 nights * 98 M ■: - :: .-; ■ BAD ORIGINAL Hitting the arm (112) of the associated angle lever (ill) triggered Hit the hammer (12O) against the paper (51 * 52) in. Abutment against the plate guide (31, 32, 33) can be brought and to this can be pressed. 12. Schnei! Printer system according to claim 11, characterized in that the spring wire (123) on both sides of the hammer (l20) through which it is passed through, is bent to form a turn (124), wherein the ends of the spring wire located behind these coils (124) (123) against the plate guide provided for the paper (51 »52) (31, 32, 33) extend. 13. high-speed printer system according to claim 5 »characterized in that the power springs (115) connected at one end to a second arm (113) of an angle lever (ill) with their others Ends on the support means (10, 105) of the arrangement (100), respectively attached with the interposition of an adjusting device (II6) are used to pre-set the Peder load of the bell crank (ill) is movable, with the Pe derbe on achlagung and the Mass of the hammer (120) in the sense of the greatest possible prevention of a second strike of the hammer (120) against the Paper are selected after the first stop. 14 · tendon 11 printer system according to claim 1, characterized in that the printer engages a roller (22) which can be brought into contact with the type drum (20) for the purpose of applying ink to the types in the type gaps of the drum surface, furthermore one between the type drum (20) ) and the hammers (l2u) provided plate guide (3I, 32, 33) for the paper (51, 52) to guide the paper past the drum surface without touching it, in. the plate guide (31> 32, 33 ) an opening for striking the paper against the type drum (20) by the hammer (120) is provided, and in each case specially provided Absohirmnittul (127), which extend between the typespal th on the type drum (20) and in an undesired one Contact of the paper with types in an intentionally struck type adjacent column preventing arrangement are provided. BATH ORIGINAL 309825/0834 226029 15 »Fast printer system according to claim 14, characterized in that the shielding means (l27) in the form of a plurality of parallel ones Wires are formed extending over the opening in the plate guide (31, 32, 33) for the paper extend and each Provided between adjacent type columns on the type drum (2O) are and here the paper is yielding in one of the writing surfaces of the type drum (20) in the radial direction represent partitions that are in a detached position on the outside. l6. High-speed printer system according to claim 14 »characterized in that the shielding means (I27) in the form of a plurality of parallel Rails are formed which extend between the adjacent type columns on the type drum (20) and their spacing from the paper in a relative to the center of the type drum (20) radial direction is less than the distance of the Writing surfaces of the types from the paper. 17 · high-speed printer system according to claim I4, characterized in that Means (25, 26) for mounting the roller (22) used for the application of paint for reciprocating movements in the approach to the Type drum (20) up to the facility against this and moving away from this as well as depending on the control means in the operating state of the printer for bringing the roller (22) up to the type drum (20) means (237, 2J8) that can be actuated against this are provided. 18. High-speed printer system according to claim 1, characterized in that several parallel plate guides (3I, 32, 33) are provided for the paper that are used to guide the paper past the drum surface without touching it between the type drum (2o) and the hammers (l20), these plate guides (3I, 32, 33) have congruent openings (31a, 32a, 33a) for the hammers (12o) to strike the paper against the type drum (20), wherein, in addition to the means provided for the paper transport, a feed means (50) for paper tape (5I, 52) for feeding it between two of the plate guides (31> 32, 33) and one together with these plate guides (32, 33) a slot for the introduction of other Ibmmlaren (34) between these plate guides 3 0 9 82.6 / 08 3 4 bad original (31 »32) defining third plate guide (31) belong, with feed rollers (40, 40a) are provided for the simultaneous advance of the paper through the plate guides (31, 32, 33) and wherein the printer is coupled to the resetting means (154 »155) and when the resetting means (154» 155) is actuated by the control means for bringing about a rotary movement of the feed rollers (40, 40a) leading over a predetermined distance engages actuatable actuating means (210, 214). 19. tendon 11 printer system according to claim 18, characterized in that the plate guides (3I, 32, 33) openings (31b, 32a, 33b) for have opposing feed rollers (40, 40a), wherein the actuating means (210, 214) is for simultaneous propulsion of the two feed rollers (40, 40a) in the feed direction of the between the plate guides (31, 32, 33) inserted paper is coupled. 20. Schnelldrucke rsy system according to claim 19, characterized in that an accessible from the outside of the printer manually operable device (243) for separating the feed rollers (40 _f 40a) to enable the introduction of the other form (34) is provided in the slot . 21. Sehnelldruekersy system according to claim 20, characterized in that the electronic control means on in response to the actuation the hand-actuatable device (243) for blocking the other punctures of the control means includes actuatable means (246). 22. High-speed printer system according to claim 19, characterized in that means (247) responsive to full insertion of the other form (34) into the slot, and one responsive thereto for commissioning the control means for further execution of others Functions actuatable means (70) are provided. 23. Multi-station printer, characterized by [a] a motor (M), [b] a (type drum (20) with a printing column for each of the locations, the type drum (20) for triggering rotary movements BAD ORIGINAL 3Ü9825 / 083A is connected to the motor (Μ) and has similar types of printing in a large number of lines, [c] means (31, 32, 33, 40, 40a) for the paper feed, to which also plate guides (31, 32, 33) belong to the paper guide which has an opening in the vicinity of the type drum, [d] an arrangement (lOO) carried by support means (lOl, 105) attached to the construction frame (lO), providing the stop force and serving for resetting, which in turn contributes spring-loaded mechanisms (ill, 120 »130, 131, 154» I55) to * ¹ writing hammer acceleration and resetting, to which pawls (13O, 131) belong to holding these mechanisms in force-storing positions, these mechanisms being in operative connection with the Type drum (20) are arranged in opposition to this at the opening in the plate guides (31> 32, 33), [e] one as part of each of the mechanisms (III, 120, I30, 1-31, 154 »155) in the one delivering the stop force and the rest All serving arrangement (100) included and in comparison to the corresponding column of the type drum (20) arranged hammer (120) and the hammer (120) for free to and fro movements in relation to the type drum (20 ) radial direction supporting guide means (122), [f] an ill in each of the mechanisms (120, 130, 131 "154" 155) created inclusive to write hammer acceleration initialization and reset angle lever (ill) with a gsgßn for striking a hammer (l20) aligned first arm part (112) and a second arm part (II3) connected to a drive spring (115) loading the first arm part (112) against the hammer (12O), wherein .these angle levers (ill) on the support means (lOl, 105) of the Arrangement (lOO) are pivotably mounted, [g] an arm assigned to one of the angle levers (ill) and pivotably mounted on the support means (101, I05) of the arrangement (lOO) as part of the respective pawl (130, 13l) Hook part (134) closed m latching of one of the arm parts (112, 113) in a position of the first arm part (112) that is moved away from the hammer (l20) in question, and [h] one for moving the arm of the associated pawl (I30, I3I) and for Disengage from its hook part. (l34) from the attack on the arm part (ll2) of the person concerned . Angle lever 309825/0834 BATH ORIGINAL Angle lever B (ill) actuatable actuating means (137 »138) selective printing. 24. Multi-position printer according to claim 23, characterized in that the Bückstellmittel (154, 155) * ^η form of rockers are formed, which extend transversely over all angle levers (ill) and in one when moving to move one of the arm parts (112, 113) and for resetting the mechanisms (ill, 120, 130, 131) serving for hammer acceleration into the positions of one of the arm parts (112, 113) of each of the Angle levers (ill) are arranged to rest against one arm part (112) in a suitable position, a return shaft (171) being provided which is carried by the support means (101, 105) of the arrangement (100) and which in turn carries a cam part (170), wherein a cam follower part (169) connected to the rockers (154, 155) during a rotary movement of the cam part (170) is provided for moving the rockers, and wherein a cam follower part (169) is provided when the cam part (170) is started up to transmit the rotary motion Coupling means (I84) which can be actuated on the restoring shaft (171) are provided g of the motor (M). 25 · Multi-station printer according to Claim 24, characterized in that the support means (10l, 105) of the arrangement (100) two in comparison encompass spaced-apart side plates (lOl), in which bearings for the through-this extending Reset shaft (171) are provided, between the side plates (lOl) a pivot block (105) is arranged, the carries the guide means (122) provided for the hammers (120), wherein the pivot block (105) extends from the type drum (20), in comparison to the guide means (122) of Hammers (l20) are arranged and trunnions (HO) for storage the tinker lever (ill) carries, whereby the first arm parts (112) the link lever (ill) in the vicinity of the guide means (122) alternately from opposite directions in an interlocking one The arrangement against the hammers (l20) extend inwards, with the hammers (l20) passing through the guide means (122) * stretch and between the first arm parts (112) and the respective associated BAD ORfGINAL 309825/0834 ^mL associated columns of the type drum (20) are arranged and ■ wherein the pivot block (105) has further pivot pins (132, 133), on which the arms of the pawls (130, 131) each in alignment with the arm part (112) of the angle lever in question (111) are stored. 26. Hehrstelle printer according to claim 25 »characterized in that the electromechanical actuator (137, .138.) solenoids includes each one with an arm of a pawl (130, 131) to move it out of the interlocking division -connected Have plunger core (136, 139), the support means (101, IO5) of the arrangement (100) encompassing a plurality of solenoid decks (142, 143), the one between the facing sides of the side plates (lOl) which supplies the stop force and for resetting serving arrangement (100) extend and are supported on these, and wherein the immersion cores (136) 139) äer solenoids (137s 138) on the arms of the relevant, mounted on the pivot block (105) Engage the pawls (13Ο, I31). 27. Multi-station printer according to claim 26, characterized in that at least two solenoid decks (142, 143) are mounted on each of the facing sides of the side plates (IQ1), wherein the solenoid decks (142, 143) on each side of the solenoids (137, 138) in a überanderge layers th, offset against each other Wear arrangement. 28. Multi-point printer according to claim 23, characterized in that the hammers (l20) each in the form of a parallel arrangement all the other hammers (120) and in comparison to one Tip column of the type drum (20) carried by the guide means (122) Rod are formed, each of the hammer (l20) in one in the unlatched state of the first arm part (112) of the associated Angle lever (ill) when resting on the first arm part (112) not to touch the length of paper (5I, 52) extending through the plate guide (31, 32, 33) is formed and one only when the first arm part (ll2) is violently struck against the hammer ('12O) does not result in a Holding the hammer (120) in a detached position from the paper (51, 52) 309825/0834 BATH ORIGINAL - 48 re rl: ck te η position actuatable impact spring (125) is provided. 29. gauge printer according to claim 28, characterized in that the impact spring (123) is in the form of a spring wire which extends through the H an me r (120) and beyond this and against the one provided for the paper (51, 52) Plate guide (3I, 32, 33) is curved, this spring wire by hitting the arm part (ll 2) of the associated Angle lever (ill) triggered striking of the hammer (l20) against the paper (51, 52) in contact with the plate guide (31, 32, 35) can be brought and pressed against this. 30. Delivery point printer according to claim 29, characterized in that the spring wire (l23) on both sides of the Ilanin (l2O) through the it is passed through, is bent to a Y / indung (124), wherein the ends of the spring wire located behind these coils (124) (123) against the plate guide provided for the paper (5I »52) (31, 32, 33) extend. 31. Multi-station printer according to claim 23, characterized in that each at one end with a second arm part (l 1J) one Angle lever β (ill) connected power springs (315) with their other Ends on the support means (lOl, 105) of the arrangement (lOO) each with the interposition of an adjusting device (Ho) are attached, which are used to preset the spring load of the bell crank (Ill) is movable, the Iiaßverhäl conditions of the arm parts (112, 113) »their Liassen, the feather loading and the Mass of the hammer (l20) in the sense of preventing a second strike as far as possible ;? des Hanne rs (l20) against there !? Paper after the first approach has been completed. 32.] ,: Honorary printer according to claim 23, characterized in that the printer has a zuu; Paint application to <3 ie Tym η in the type space υ of the drum surface in the system geprMi dio 'JVi.f.ntrommel (20) briurbaren Y / alze (??) and specially provided »- shielding means (127) which includes extend between the type parts on the type drum (20) and in a one u :. The frontal contact of the Pwpierc with T; _; piji in a v. bsicli 11 i ch; M (^ soli! .- .. gene η Tyjie benacli- bari.en > B / 083 i. .. ^BAD original - 49 - arrangement to prevent hard crevices are provided. 33. Multi-point printer according to claim 32, characterized in that the shielding means (127) in a plurality of parallel Wires are formed which extend across the opening in the plate guide (31 »32, 33) for the paper and respectively are provided between adjacent type columns on the type drum (20) and the paper is flexible in one of * after the writing surface of the type drum (20) in the radial direction represent partitions that are in a detached position on the outside. BATH ORIGINAL 0 8 1 '