DE1097194B - Printing device for point-by-point composition of characters while evaluating the encrypted information supplied by registration strips or cards - Google Patents

Description

GERMAN

The present invention relates to recording media controlled printing devices for the printing of characters made up of dots or lines arranged in a grid pattern.

For printing the individual characters to be printed, it has already been proposed to use a set of z. B. 35 metal wires to use, which are arranged in several adjacent rows and with their ends in one for printing, e.g. B. a sheet of paper, parallel plane are aligned and suitable Means a certain number of these wires to move selectively and simultaneously so that their ends through Hit a carbon paper or a ribbon against the sheet of paper or the like.

It has also been suggested that each character lined up using a smaller number Pressure organs, e.g. B. five, to print the one or more dots arranged in a row on the paper produce and for this purpose can be operated optionally by suitable means; this process is z. B. seven times repeatedly to print successive lines of the dots making up the character, each time the printing elements to be operated are selected and the paper by one with each printing process is conveyed further at a certain distance.

In the case of printing devices in which each character is selected by selecting and simultaneously pressing in is printed several lines per character arranged wires, the guide means and the means for the selection of print wires is complicated and costly. The facilities at which printing each Character is carried out by repeated and selective actuation of pressure elements arranged in a line, are less complicated than the previously mentioned facilities, but often much more expensive than the very advantageous ones Machines with racks or type wheels.

In the known electromechanical devices that have a single line of pressure elements for one off Character formed in dots or pieces and a decoding device for those read from the card Owning information, one encounters significant disadvantages due to the large number of circuits and Contacts through which the electrical current for the actuation of the pressure elements must be transmitted from the decryption device.

The invention relates to a printing device controlled by recording media for printing characters consisting of dots, indicating the number of circuits and contacts for transmission of the impulses for the printing of a certain character from the decryption device on said Pressure organs is reduced.

The invention accordingly relates to a printing device controlled by recording media for point by point Printing facility

for point-by-point assembly

of characters under evaluation

that of registration strips or cards

supplied encrypted information

Applicant:
Compagnie des Machines Bull, Paris

Representative: Dipl.-Ing. B. Wehr, Dipl.-Ing. H. Seiler,

Berlin-Grunewald, Lynarstr. 1,

and Dipl.-Ing. H. Stehmann, Nuremberg 2,

Patent attorneys

Claimed priority:
France December 14, 1955

Composition of characters from points arranged in a line grid, which are printed progressively from line to line on the material to be printed, the selection and the drive of the printing elements required in each case being effected by a scanning and decoding device, one or more at the same time Can optionally connect print heads with transmitting members of an electrical or mechanical stencil that determines the corresponding characters; The invention is characterized in that several actuators of a print head are on the one hand electrically connected to one another and to a common contact that can be set by the decryption device and can be connected to one of the transmitting members via it, and on the other hand are each connected to a contact of a commutator which is used for each line of dots to be printed of a character connects all actuators of a print head one after the other in a certain order with a pole of the power source.
To print a specific character by means of one or more printing units that print the same character and are coupled together, the pulses generated by a pulse generator intended to control the printing can be applied to the actuators of the printing units via one of a

009 698/281

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umpteen relay contacts are transferred to the monitored circuit; the duration of a machine game is in

will. divided into fifteen equivalent parts, the »machine

In the arrangement according to the invention, the game points will be called "and in their chronological order

known use of electrical signals by the numbers 9-8-7-6-5-4-3-2-1-0-11-12-13-14 and

different frequencies, which are designated in a single line 5 15.

brought together and then · separated out, each contact disk consists of electrically conductive

avoided. Fabric and indicates appropriately affixed to its perimeter

In one of the invention corresponding printing depressions and projections to at certain device, the printing of each character is made by choice times of the machine game contact with a wise and repeated actuation of in a single io contact brush.-According to Fig. 1 is the Contact line arranged, dot-wise printing pressure plate GA divided into fifteen sections, which reaches the organs; these organs are z. B. from electrical numbers of the machine play points, while tric pulses controlled by a depending on which they move past the contact brush BA . Design of the selected character to be printed Each slice section is divided into five equal parts, pulse generator supplied. 15 which have a recess or a projection, each

The current pulses generated for printing a specific character by a generator intended for transmission after this part of the contact disc will or should not make contact with the brush BA up the printing elements of one or more printing units. The contact brushes BB, BC, transmitted via a character selection device, the, BD ... are arranged in such a way that, if necessary, they can control the contact by a decryption device with the projections of the contact disks GB, GC for the registration cards or strips or GD ... manufacture. When the disks are encoded in rotation, a single path movement and under voltage, one receives or sets up a circuit that monitors the transmission of each of these brushes with current impulses that control the printing of the impulses called printing on the said printing units of certain characters as described in the following . 25 exercise more detailed conditions can be controlled.

Each of the pulses generated by the contact discs successively transmitted to a transmitter via transmission lines TA, TB, TC ... is fed to all actuation circuits of the printing elements on the character selection devices 5Cl, SC 2 ... via a printing unit at the same time. The actuators. Each character selection device contains a supply circuit of the above-mentioned pressure elements are normal- 30 collecting line LCl, ZC2 ..., which are interrupted by working contacts at open contacts, which are connected by means of RIlSb, ROSb, RlSb, R2Sb, R3Sb ... R5-2b, £ 6- 2δ of a commutator can be closed in a certain sequence with each transmission line TA, TB, TC, TD so that the one from one is bound. Each contact can be controlled e.g. B. Transmitter on the actuation circuits of the pressure organs of a pulse transmitted by the relay consisting of relays decryption printing unit to the said 35 device, the scheme of which is made effective in Fig. 3 A and 3 B-pressure organs in a certain sequence, are optionally closed . Each collection line LCl, LC2 ... is connected to the

In a point-by-point printing device of one or more printing units JMP-I, IMP-2 ... according to the invention, the same commutator can be connected. The actuation electromagnets A1, A2, actuation circuits of the pressure organs of several printing units 40 A3, A4, A5 of each printing unit are to be monitored simultaneously via one equal unit each; He can also monitor the judging element RD, which prevents reverse currents between the electrical actuation circuits of the printing elements of all printing magnets of the various printing units, units of the printing device. on the one hand with a supply line LAl, LA2 ...

An embodiment of the invention is in the course and on the other hand individually with a return line LRl,

the following description 'and on the basis of the 45 LR2, LR3, Li? 4 or Li? 5 connected. Every electrical

explained in more detail. magnet Al, A2, A3, 44, A5 load a printing unit

Fig. 1 shows schematically the between which the printing makes when it is excited, a pressure element Fl, F2, F3,

controlling organs represent electrical circuits; P "4 or F5, either a print wire or a

FIG. 2 shows the arrangement of the pressure elements of several pressure levers, the pressure point of which is shown in FIG.

- printing units; 5 ° The pressure elements of each pressure unit are

Fig. 3 A and 3 B together represent the scheme of another operated, while the paper sheet, the

Decryption device with relay; picks up the pressure while pressing in the

Fig. 4 is a diagram showing the closing times of a certain arrow direction F (Fig. 2) with respect to the said organ

Shows contacts of the schemes of Figures 1, 3A and 3B; nen is moved. The pressure organs of every pressure

Fig. 5 shows partially a registration card, the unit in the form 55 are arranged to each other in such a way that they information registered by encrypted punching stops printing in a straight horizontal line, allow ordered points if the relocation of the

In the scheme shown in Fig. 1, the printing sheet and the order in which the named organs

units IMP-I and IMP-2 of a printing device, which are actuated during the printing, into consideration

which moves a large number of such printing units. In Fig. 2, the pressure elements that are in the

can grasp , operated one after the other with electromagnets Al, A2, A3, AA and the sequence in which they are lined up

AS provided, which are under control by electrical, arranged in oblique rows in order to during

Impulse for the actuation of one organ each for printing the pressing of a row of dots the displacement of the sheet

of points serve. balance.

The electrical impulses are the electromagnet 65 The return lines Li? 1, Li? 2, LR3, Li? 4 and Li? 5

supplied by a pulse generator G in which are the actuating electromagnets of the printing units

Current pulses for the formation of each character by means of one with the contact segments C1, C2, C3 and C5

a special contact disc. The rotating commutator DS connected (Fig.l).

Contact washers GA, GB, GC, GD ... GS, G6 are open. In another example, this could

a shaft AR wedged, which consist of one revolution per machine 70 commutator from cam contacts that

ι uy / iy ^ r

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normally opened or closed in a particular order as in the printing of dots ΡΓ4 and PTS on the line diagram of FIG. 4. LI2.

Such a commutator can also be on the lines LI3 or on the return lines

the electromagnet of all printing units of the following lines under control by the disk direction monitor. 5 projections printed during the following

Machine play points 15, 9, 8 and 7 establish contact

^Make operation of the printing device - ^Fi S 2 also shows how the letter B

and C are printed. The contacts RIlSb, R0-8b,

The contact discs, the cam contact C 22 and the J? 1-8 δ ... a character selection device of the commutator DS in Fig.l are shown in Fig. 1 in the position, i ° illustrated printing machine can either be at the beginning of the machine game point 7 with the hand or with the help of a keyboard or any. This position corresponds to the time for another means to be closed. Further below, the printing of the first point of the last row of dots is described, how the mentioned contacts of characters to be printed on a print line, whereby registration cards or strips are recorded, so that the other said characters can be controlled, For example, rows of dots that form holes have already been printed. cards on which characters are in encrypted form

To explain how it works, the end of the are registered. In Fig. S a registration card is partially

Point 11 of the machine game considered, shown wisely, which in certain columns one or

precedes the start of printing the characters. has several holes, one letter, one

In the character selection device SCl (Fig. 1) 20 denotes a digit or a character,
the one supervising the printing of the letter A.

Contact R 11-8 b for printing this letter decryption device
shown closed, and in the case of the character selection device SC 2, the printing of the letter B is shown closed. 25 standing decryption device is intended to allow the closure of each of the contacts RIlSb and ROSb under the control of such registration cards, as already said, from the one shown in FIGS information registered from relays described below. The numbers of the existing decryption device are monitored by the horizontal lines of holes on the card. 30 marks of the machine game points, during which

After the end of the machine game point 11 closes the rows of holes can be read.

the cam contact C22, whose cams are synchronized. A perforation in lines 11, 0, 1, 2, 3, 4, 5, 6, with

with the wave 42? one revolution per machine cycle of a perforation in the same column

executes <"...,. . · _Λ τ, - 4. r> in line 7 means: A, B, C, D, E, F, G, H;

At the beginning of point 12 the rotating brush R 35 is _{in line 8 means:} j _{KLMN P>} q _r .

the commutator DS m contact with the segment Cl _{in the line} 9 _be indicated: S, T, U, V, W, X, Y, Z.
on the other hand, the brush BA, that of a recess SAO

the contact disc GA is opposite, not in contact. Without additional perforation means a perforation in the

with this. No current can flow, and the print lines 11 to 9:., 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.
line LIl of the first row of dots of the characters on the 40. The perforations in lines 0 and 1 also represent the

Registration sheet (Fig. 2), which at this point in time represent the letters O and I.
Opposite pressure member Fl does not receive any pressure. Each decryption device is processed by the

During the second part of the machine game point 12 of a reading device delivered pulses, the projection S ^ l of the disc GA (Fig.l) is in contact with the reading device in contact with the perforations registered in a certain one of the brush BA , and the following 45 card columns are created reads and the circuit: positive pole of the power supplying the machine - character selection contact RIlSb, ROSb ... closes, the source, closed cam contact C22, shaft AR, the printing of the character represented by the read encrypted contact disc GA, projection SAl, contact brush BA, combination controls.
Line TA, closed contact R 11-85, collective The registration cards CE (Fig. 3A) are after introduction LOl, plug connection CF, supply line LAl 50 other in a known manner under the reading brushes by means of the printing unit IMP-I, electromagnet A 2, return conveyor rollers RA pushed forward. A reading line Li? 2, contact segment C 2 of the commutator DS, brush BAL can rotate brush R through the perforations of the card, negative pole of the power source. The pressure point located at this moment on the line LIl due to the contact with a contact shaft RC , which the current impulses by means of a cam element F 2 (FIG. 2) is received from the electromagnet A 2 55 contact ClO (FIGS. 3A and 4) . Each of these actuates and prints the point PTl. The points PT2 pulses correspond to the possible passage of a and ΡΓ3 are then on the same line through the perforation under a reading brush. When a perforation of the electromagnet A3 or A4t actuated passes under the brush BAL , the impulse is printed by pressure elements F3 and Fi , which transmit these perforations to the line LA , magnets by touching the projections SA 2 and SA3 60 die the windings of all relays R9-1, R8-1, 227-1, the contact disc with the brush BA one after the other 2? 6-1, 225-1, 224-1, 223-1, 222-1, 221-1, 220-1, 2211-1 and are energized (Fig. 1) while rotating brush 22 is simultaneously feeding 2212-1 (Figs. 3A and 3B). These relays via the segments C 3 and C 4 of the commutator are also moved with the via rectifier bodies CA. Those points are connected in spite of the continuous lines L9, LS, L7 ..., L 11, L 12, the displacement of the sheet while pressing on the 65 itself with the contacts P9, P8, PT, P6 ... Pll, P 12 printed horizontal line LIl (Fig. 2), namely in a rotary commutator DA , the consequence of which is the obliquely offset arrangement of the pressure rotating brush BRO to the negative pole of the current organs Fl, F2,2 ⁷ 3,2 ⁷ 4 and F5. During the machine circuit of the printing device feeding the current source trigger point 13 which is closed under the brush BA. The shaft of the commutator DA leads through projections of the contact disk GA 70 one revolution per machine cycle, and the rotary

7 8

The brush BRO "moves while the contact disc controlling the printing of the number 9 is scanned

of lines 9, 8, 7, 6 ... 11 and 12 of the registration generated pulses on one or more pointwise

columns of each registration card via the contacts P9, P8, working print units are transmitted.

P7 ... Pll and P12. The reading of a perforation on While pressing the cam contact C20 is in

position 5 of a column of cards is therefore open at 5 with machine game points 13, 14 and 15; down-

Machine game point 5, and the rotating brush BRO breaks the holding circuit of the relay R 9-2, the

of the commutator DA is at this point in time for a possible registration of the reading

on the contact 5. The hole 5 of a hole 9 that has been read off again during pressing

voltage applied through line LA is turned on.

all relays 229-1, R8-1 ... 2211-1, 2212-1 applied; but OK After printing, cam contact C23 opens

a circuit is only made via contact P5 for the temporary; it interrupts the holding circuit of the relay,

Relay R 5-1 closed, which is thereby excited. Each one the one character selection contact while pressing

this relay closes when energized and keeps a corresponding one closed.

Contact R9-la, R8-la, R7-la ... RIl-Ia, R12-la " _x ,,,, ^ ₁ * ^ _x,.
These contacts receive the power via a means of i ₅ decryption and printing of the number 4
of a cam contact C20 (Fig. 4) under tension. The reading of a perforation 4 through the brush BAL set the line LMS. The excitation of the relay 225-1 in a registration column excites the relay R 4-1, which starts, for example, the closing of the contact R5-la, which is its contact !? 4-1 «closes and thus line Z.2? 4 temporarily energizes the line LB 5, which energizes the line via which the relays are energized by the relays 225-3, 225-5 and 225-7. 20 224-3, 224-5 and 224-7 are temporarily excited. The relay 225-3 closes contact 225-3 "and switches relay 224-7 temporarily closes its contact 224-7"; contacts 22 5-3 δ and 22 5-3 c around. The relay 225-5 has no effect, since the line LB 7 does not close the contact 225-5 «and the relay 225-7 is under voltage. The excitation of relay 224-5 to contact 225-7 «. The task of the relays 229-2, 228-2 has the effect of closing the contact 224-5 ", which also and 227-2 will be described further below together with the task 35 has no effect, since the line Z.238 is also not under certain others Relay described. In the after- tension stands. The excitation of the relay 224-3 causes standing examples in which the decryption is the ineffective closing of the contact 224-3 ", which explains the digits 9 and 4 and the letter A is also ineffective switching of the contact R 4-3 c , which is shown in the columns 12, 13 and 15 of the in Fig. 5 and the switching of the contact 224-3 δ. As a result of the partially shown registration card appear, 30 switching of the contact 224-3 δ, the relay 224-2 the use of the perforation 12 is not excited by the following circuit: positive pole, closed. sener cam contact C20, line LMl, chain of contacts 229-2δ to 225-3δ in ",,, ... j τ-, ι j ry-rr η rest position, decryption and printing of the number 9 switched contact 224-3δ, Relay 224-2 and minus

When passing a perforation 9 under the reading 35 pole of the power source. The excitation of the relay 224-2 brushes BAL is the rotating brush 23220 of the grain - it closes the contacts 224-2 «and 224-2δ. imitators DA (Fig. 3B) on the contact P 9, and a through the closed contact 224-2 «the relay circuit is closed by the relay 229-1, the 224-2 kept energized via the cam contact C 23. Who is aroused in this way. This relay closes the contact 224-2δ is that character selection contact, the contact 229-1 «, which on the one hand sets the line LB 9 under voltage via the rectifier 40, the printing of the number 4 from the machine play point 12 organ CB 4. The relay 229-2 up to point 7 of the next machine game is energized and closes the contact 229-2 «, watches.

its closure at this point has no effect on decryption and printing of the letter A
is, and switches the contact 229-2 δ, which establishes a holding circuit for the relay 229-2. 45 As in column 15 of the map shown in Fig. 5

The closure of the contact 229-1 «is otherwise shown, the letter A is represented by the combination of two perforations on the other side via the rectifier element CB 1, the line LM 3, energized and energizes the relay 2210, which is the one Hole 7 and a hole 11, which closes on contacts i210 «and 2210 δ. The closure of the can be read sequentially.
Kontaktes 2210 «has no effect at this point in time. 50 Reading the perforation 7 energizes the relay 227-1. The following circuit is created via the contact 2210 δ, which closes the contact 227-1 «. The closing of this, which keeps the relay 2210 energized: the positive pole of the power source, contact causes the closed cam contact C20, line LM5, chain to excite the relay 227-2, which connects the contact 227-2 of the inactive contacts 2211 via the line LB7 -3c to closes and the contact R 7-2δ switches over, through the 226-3c, line LM6, contact 221Οδ, relay 2210, 55 the line LB7 under voltage and the relay 227-2 line LB21, negative pole of the power source. are kept excited via the cam contact C20. That

At the end of the machine game point, the cam closing of contact 227-1 «sets the other hand

contact C21 temporarily closed. If no other line LMZ is live , via which the relay 2210

Punching in the same registration column of the card is de-energized. This relay closes contact 2210 δ,

has been read, relay 2210 remains energized; over the 60 through the it over the in rest position

closed contact 2210 «results in the following contacts 22 6-3 c to 2211-3 c is kept energized, and

Circuit: Positive pole of the power source, line LM 4, closes the contact 2210 «, which is at this point in time

closed cam contact C 21, closed contact has no effect.

2210 ", contact 229-2", relay 229-3, negative pole of the perforation in the same column of the card

Power source. The energization of the relay 229-3 closes the 65 11 is then read, which the relays 2211-3, 2211-5

Contact 229-3 ", through which it is temporarily excited via the closed and 2211-7. The relay 2211-3 closes

Cam contact C23 is kept energized, and closes contact 2211-3 ", without any effect because the

also the contact R 9-3δ of the character selection device. Line LB 9 is not live; the contact

This contact 229-3δ remains while the machine 2211-3δ is switched, also without effect, since

play points 12 to 7 closed, during which the contact switched by 70 of the energized relay 227-2

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R7-2b interrupts the circuit that would energize relay R 11-2. The dropping out of contact R 11-3 c interrupts the circuit by which the relay RIO was kept energized. This relay thus drops the contacts R 10 ″ and R 10 b , which it held closed. The excitation of the relay R 11-5 closes the contact R 11-5 «, but without any effect, since the line LB 8 is not live. The excitation of relay R 11-7 closes contact R11-7 a. Since the line LB7 is under voltage through the contact R 7-2 b, which also keeps the relay R 7-2 energized, the closing of the contact 2211-7 «causes the relay £ 11-8, which connects the contacts R 11-8 «and RIlSb closes. The closing of the contact R 11-8 «establishes a holding circuit for the relay R 11-8 via the closed cam contact C 23, and the closing of the selection contact R 11-8 b controls the printing of the letter A from the next machine play point on.

Reading a hole 8 causes the excitation of the relay 228-1, 228-1 that includes the contact ", whereby the relay is excited 228-2, which closes the contact and the contact R8-2a R8-2b switches, the line 1.58 is kept under tension via the cam contact C 20 and the contact R 9-2 b, which is in the rest position. If a perforation 6, 5 ... 0 or 11 is then read in the same column of the card, one of the relays 226-5 ... 2211-5 is energized. The energized relay closes the corresponding contact R6-5a, ... RIl-Sa connected to the live line LB 8. Closing this contact energizes the corresponding relay R6-6 ... 2211-6, which closes its holding contact 226-6 "... 2211-6", which is connected to the live line LM 2 via the cam contact C 23, and the character selection contact 226-6δ ... 2211-65, which enables the printing of a the letters R, Q, P, N, M, L, K or the letter J, depending on whether the second hole read in the same column was a hole 6, 5 ... 0 or 11. Reading one of these perforations also controls the excitation of one of the relays 226-3 ... 2211-3. The excitation of one of these relays closes one of the contacts 226-3 "... 2211-3", switches one of the contacts 226-36 ... 2211-36 and leaves one of the contacts R 6-3 c ... R 11 -3 c drop. The dropout of one of these last contacts will break the circuit that keeps relay 2210 energized. If after reading a perforation 9, 8 or 7 no perforations 6, 5, 4 ... 0 or 11 are read, the relay R 10 is kept energized, and when the cam contact C 21 closes, the line LM7 at the end of the line can be energized Machine game point 11 the excitation of one of the relays 229-3, 228-3, 227-3 by one of the contacts 229-2 ", 228-2", 227-2 ", which is closed as a result of the reading of a perforation 9, 8 or 7 . When a relay 229-3, 228-3, 227-3 is energized, it closes a hold contact 229-3 ", 228-3", 227-3 "and a character selection contact 229-3 b, 228-3 δ, 227- 36, which monitors the passage of the pulses that control the printing of the number 9, 8 or 7 corresponding to the perforation read. It has been shown that the reading of a perforation 9 temporarily energizes the line LB9 , which line is kept under voltage by the switched contact 22 9-2 δ. Reading a perforation 6, S ... 0 or 11 after reading the perforation 9 causes a relay 226-3 ... 2211-3 to be energized, which on the one hand closes one of the contacts 226-3 "... 2211-3" , which causes the excitation of a corresponding relay 226-4 ... 2211-4. This relay closes a hold contact 226-4 ″ and one of the character selection contacts R 6-4 b ... 2211-4 δ, the

Printing one of the letters Z, Y, X, W, V, U, T or S controls. On the other hand, by energizing a relay 226-3 ... 2211-3, one of the contacts 226-3δ ... 2211-3ö is switched over. If no perforation 9, 8 or 7 was read before reading a perforation 6, 5, 4 ... 0 or 11, the dropped contact 226-36 ... 2211-36 causes a relay 226-2 ... 2211-2, which closes one of the holding contacts 226-2 ″ and also a character selection contact 226-26 ... 2211-26, which enables the printing of a number 6, 5, 4 who can control the printing of a point. The reading of a perforation 6 to 11 after the reading of a perforation 7, which has caused the line LB7 to be energized, energizes one of the relays 226-7 ... R11-7. The excitation of one of these relays causes one of the contacts 226-7 "... 2211-7" to close. When the contact is closed, one of the relays 226-8 ... 2211-8 is excited. The energized relay closes one of the holding contacts R 6-8 «... R11-8« and a character selection contact. The character selection contact R 6-8 6 ... R11-8 δ thus closed controls the printing of the letter H, G, F, E, D, C, B or A corresponding to the energized relay.

Claims (4)

Patent claims: 1. Printing device controlled by recording media for point-by-point composition of characters from points arranged in a line grid, which are printed progressively from line to line on the material to be printed, the selection and the drive of the printing elements required in each case being effected by a scanning and decoding device , which can connect one or more print heads at the same time optionally with transmitting members of an electrical or mechanical template determining the corresponding characters, characterized in that several actuators (A ₁ ... A ₅ ) of a print head are electrically connected to one another and to a common one by the decryption device adjustable contact (2211-8 δ, 220-8 δ) and can be connected via it to one of the transmission elements (GA, GB ...) , on the other hand individually with one contact each (C ₁ , C ₂ ...) of a commutator ( DS) are connected, the for each dot line to be printed a Ze ichens connects all actuators of a print head one after the other in a certain order to a pole of the power source. 2. Printing device according to claim 1, characterized in that the commutator (DS) is jointly assigned to a plurality of print heads and for each line of dots to be printed all actuators of these print heads successively unipolarly connects to the power source in staggered groups. 3. Printing device according to claim 1 or 2, characterized in that the printing surfaces of the printing elements assigned to the same characters (F ₁ ... F ₅ ) are offset from one another in the feed direction of the material to be printed, which is moving at constant speed, in such a way that the corresponding to the rotational speed of the commutator (DS) , the dots printed one after the other are aligned in the line direction. 4. Printing device according to one of claims 1 to 3, characterized in that the actuators (A ₁ ... A ₅ ) for printing a character summarized in sentences by a single connection 009 698/281 dung (CP) for each set can be connected to a group of the common contacts can be adjusted by the decryption device (R 11-8 b, RosB ...), each of which corresponds to a particular character and that character associated pulse combination supplies the actuators. Documents considered: German Patent No. 668 821; U.S. Patent No. 2,353,083; French Patent No. 1,066,883; British patent specification No. 707 736. Schiweck, Fernsclxreibtechnik, Leipzig, 1942, p. to 156. For this purpose 2 sheets of drawings