DE2115141B2 - Device for printing data received one after the other - Google Patents

Description

The invention relates to a printing device for the line feed triggered setting process

Line-by-line printing of characters, which are printed with additional printing device on the next line to be printed

borrowed control characters for the line feed as co- the print control the generation of a signal ver ·

dated signals are received continuously and prevents the actuation of the pressure elements freely

Memory circuit 65 consisting of at least two parts indicates that the first part of the memory device eim

direction can be stored, whereby for printing the group beginning after the line feed signal

Character signals from the memory device emtnom- of character signals stores that after completion

men and under control by pressure control signals of the setting process first, to the first part de

Storage device connected printing elements the characters stored in this part under control print in parallel by the print control signals in the first print positions of the new line that the second part of the storage device following the beginning group of drawing elements saves incoming character signals and that -.other, further printing elements connected to this second part of the storage device are those stored therein Print characters one after the other in the order in which they arrive in the following print locations, where the Ac number is in the second part of the memory device contained number of storage elements less than the number of after the first print points following print points is that each of the further print elements the content of the allocated memory element after each printing and that the deleted memory elements store the character signals that then arrive. As a result, the first part needs the Storage device only to be so large that it receives the maximum that arrives during the paper advance Can store characters. These characters are then printed out in parallel at the beginning of a new line, while the remaining columns are printed out serially, at least in groups, so that the to characters to be printed can arrive continuously at maximum printing speed.

One or more memory circuits are provided for the remaining columns, each of which sequentially stores the characters printed in several of the remaining columns should.

Preferably, only a number of characters are stored in the memory circuit for the remaining columns stored, which is essentially equal to the ratio of the time that the type carrier needs, to present a complete set of characters, at the time interval between successive ones Input character is. This minimizes the memory circuitry that is required to to print in the remaining columns.

From the German Auslegeschrift 1178 622 a printing device is known in which also the Memory that stores the printing information, a has a smaller number of storage locations than corresponds to the number of printing locations. The However, data are transmitted in batches, so that continuous transmission is not possible and the communication channel used for the transmission for a high transmission speed must be designed and only imperfectly exploited. This is even more true of the known high-speed printers that work purely in parallel and therefore require a memory, which summarizes the information for an entire line, and thus a much greater effort require.

An embodiment of the invention is explained in more detail with reference to the drawing.

Fig. 1 is a schematic diagram of a Printing device;

2a and 2b together form a schematic Logic diagram of part of the pressure control circuit, which is shown in Fig. 1 as a block;

F i g. Figure 3 is a schematic logic diagram of that portion of the print control circuit, the characters enters the registers shown in Figure 2; 4 is a schematic logic diagram of a typical hammer selection circuit shown in FIG. shown as a block;

F i g. 5 is a schematic logic diagram of that portion of the pressure control circuit which includes the Paper feed controls;

F i g. 6 is a waveform diagram in which the operation of the in the F i g. 2, 3 and 5 illustrated parts of the pressure control circuit explained

ίο is;

F i g. 7 is a diagram showing the operation of the hammer selection circuit shown in Fig. 4 is explained.

Fig. 1 shows schematically a printing device

with a conventional printing drum 1, which bears type marks on its circumference. The type characters are arranged in rows parallel to the drum axis and in eighty columns corresponding to the columns in one line should be printed on a document 2. Each column of the drum 1 contains a complete one Set of type characters and a space in which no character appears. The 1 rommel 1 is rotated at a constant speed by means of a drive device (not shown). That

Document 2 is by a schematically shown paper feed device 3 line by line from the Drawing level advanced step by step. The paper feed device 3 moves the document 2 after printing each line so that the subsequent

the following line can be printed. Any conventional paper feed device can be used be, for example a device, the two traction members with movable endless chains which support sprocket pins which mesh with kitentenperforations in the document 2 step. A series of eighty hammers 4 are arranged near the drum 1, and the paper 2 goes between them and the drum 1 through. For each column of type symbols on the drum 1 is a hammer provided. The hammers can be of any type that works with on-the-fly impact printing is used. When a hammer is operated, it pushes an unillustrated ribbon and the document 2 against the type mark on the drum 1 which is to be printed. To determine which row on the drum 1 is approaching the hammers at each point in time is a circular code disk 5 of conventional design attached to a shaft extending from the

Drum 1 extends and rotates with it. The code disk 5 is between a light source 6 and a photosensitive device 7 arranged. As is customary, the code disk contains 5 radial ones Rows of coded openings. The rows correspond to different rows of characters on the drum J, and each contains a sufficient number of apertures to make a character in accordance present with a binary code. An additional radial row is provided in the code disk 5.

The openings in this row do not represent a symbol on the drum 1, but instead the space in which no symbol appears. Light comes from the light source 6 through the coded openings and onto a part la of the light-sensitive device 7. When responding, this part of the light-sensitive device 7 creates unambiguous binary-coded signals which identify the particular series of type characters or the series of spaces

represent on the drum 1. This signal is via signal at the input. When the flip-flop is in the

If a cable 8 is routed, which is in a sufficiently recovered state, it only speaks

holds to transmit binary coded signals. a positive signal at the ^ input or setting

As is still the case, the code gang contains an.

disk 5 a series of at a radial distance from- 5 A comparison device is a known one

mutually lying openings, each of which is connected to a circuit element, which at its output a

one of the coded rows of openings in the disk creates a positive voltage signal when it is connected to it

is arranged. Light identical to the coded signals applied through these openings inputs

passes through and represent on a second part 7 b of the light data.

Sensitive device 7 arrives, causes io A block, which is divided into sections 1, 2, 4 and so on

this creates a series of clock pulses 5. Each is, represents a binary counter. Each level of the counter

Clock pulse S indicates when a row on the drummer has two outputs, only one of which is closed

mel 1 passes the row of hammers 4. a time is energized, and the outputs each

The signals indicating the rows and the clock stage represent a bit of a binary number.

impulses 5 from the light-sensitive device 7 15 causes a tive voltage signal at one input,

are fed to a pressure control circuit 9. that the one shown on the output lines

The circuit 9 receives the one-binary number to be printed progressing by a count of one,

input data and creates output signals for control In contrast to this, a positive signal causes

the hammers 4 and the paper feed device 3. the other input, that the on the output

Before starting with the description of the logic diagrams * £> lines by a count of

is continued according to the figures, the load will be reduced. A positive signal on one

interpretation of the widely used logi-R input causes the output state of the

see circuit symbols explained. Of course the counter returns to 0, which means that on

the logic circuit elements operate in accordance with the positive signals present on all O output lines

Figures 2a, 2b, 3, 4 and 5 are in the usual manner on the as.

Basis of binary voltage level, whereby the inputs according to F i g. 2 a are the elements to be printed Elements and their outputs are always based on input data in the print control circuit in characters of two discrete voltage values are located, and bit rows or series are supplied. Such a namely the positive voltage value or the input can be negative from a long-distance transmission line Voltage value of the system. 3 ° be able to be. These input data are initially

An AND circuit is fed through a D-shaped borrowed register 10, which is shown in the series block containing the symbol "&". The arranged bits of each character to input lines connected in parallel are always converted with the even side arranged bits. Each character, which of the block and the output line is always with is in parallel bit form, is then connected over the curved side of the block. The 35 a cable 11 eight single-character memory registers 12 a function of this circuit is to provide one to 12 d and 14 a to 14 d and a function positive output voltage only when decoder 16 is supplied.

if on all input lines the positive span is generally a function decoder

value is available. Type of circuit design that when effective

An OR circuit is made up of an arrow-shaped 40, positive signals to one or more shown in the block. Input lines are always outputs if the ones fed to them are encoded the concave side of the block and the output signals represent functions of the pressure pipe is always connected to the top. The device should be exercised in place of The function of this circuit is to convey a character to be printed, for example signals that To create positive output voltage only 45 command the device to print a new line when any or more of the entry lines begin. The function decoder 16 has according to FIG are at the positive voltage value. Representation of two such function-indicating

A delay circuit is through a drop wire on for a positive carriage return oval block, which is close to its signal for initiating a new print line and for the end of the passage shows two stripes or horizontal stripes. The 5 ° a positive line feed signal for incremental The function of this circuit is to feed the paper according to a line output level to create, which was the input level. If this is assigned to the function decoder 16, However, its state after a certain led signals do not indicate a function, but the specified time period after the input is instead a character to be printed State changes, changes. 55 function decoder 16 a signal F on another

A flip-flop circuit is through one with FF of its outputs.

designated block shown. This circuit is It should be noted that the remote printing depicted is any bistable circuit in which a positive device is not of the kind that one tive voltage signal on the 5-input or single print mechanism carriage, which is during printing The setting input causes the 1 output to go positive 60 moves a line across the document. For every and remains positive, while the O output is the same. Column is a separate stationary hammer goes negative and stays negative. A positive net. Accordingly, the carriage return signal is only on Voltage signal at the Λ input or reset command to start a new print line, and it input causes the O output to go positive and needs the return of an actual print positive remains, while the 1-output at the same time 65 mechanism carriage to the first column is not a negative goes and stays negative. A flip-flop changes, conduct.

Once it has been set, it then turns off. The function decoder 16 has the 1 output state made effective only when responding to a positive transition of a flip-flop 18. The flip

Flop 18 receives its set input from the output of a bit counter 20 receives the data to be printed at its input, represented as bits arranged in series are. This is chosen to create a positive signal when there are enough bits in the data input sensed or detected to indicate that a character has been fed to the printing device is, d. That is, a signal of positive level (hereinafter referred to as a positive signal for the sake of simplicity) for 6 bits each is created when the data supplied to the printing device is in accordance with a code using 6-bit characters. In this way the bit counter creates 20 for each character an output to cause the 1 output of the flip-flop 18 goes positive and makes the function decoder 16 effective. The exit signal of the bit counter 20 is also sent via a delay device 22 to the reset input of the Bit counter out so that the bit counter 20 resets itself after it has detected a character. The output signal of the delay device 22 continues to be the reset input of the flip-flop 18 supplied to thereby terminate the positive signal at the 1 output of the flip-flop 18 and the Flip-flop 18 reset.

As mentioned above, each character represented by parallel bits is supplied to registers 12a to 12d and 14a to 14d. Each of these registers can store encoded data representing a character. The characters are sequentially entered into the registers through AND gates 17ü to, 17J and 19a to 19a ^1.

Each of these AND gates 17, 19 has three activation inputs which are connected to the in FIG. 3 are connected to the circuit shown. Each of the AND gates 17 a to 17 d receives two of its input signals from a binary counter 21 and its third input signal from the dtm 0 output of a flip-flop 25. Each of the AND gates 19 a to 19 d receives two of its input signals from the binary counter 23 according to FIG. 3 and its third input signal from the 1 output of the flip-flop 25.

When a printing process is initiated, both counters 21 and 23 are reset to their 0 state with positive signals ~ Ä, ~ B, ~ C and 25 on their O output lines. The flip-flop 25 is in its reset state with its O output line positive and creating the E signal. The output lines of the counter 21 are connected to the AND gate 17 α in such a way that the gate is conditioned by the signals Ά and B. Since the AND gate 17 α receives its other input signal from the 0 output of the flip-flop 25, which initially creates the signal E, the AND gate 17 α is originally activated and enters the first character to be printed into the register 12a .

In response to this first character, the function decoder 16 (FIG. 2) creates a signal F. After a time period created by a delay device 27 which is sufficient for the first character to be able to be entered in the register 12a, this signal becomes F applied to increment the counter 21. The counter 21 then creates output signals A and B. The AND gate 17 b is connected to the counter 21 in such a way that it is activated by these signals together with a signal E from the 0 output of the flip-flop 25. Since the flip-flop 25 continues to create the signal E, the AND gate 17 ft is activated in order to enter the second character into the register 126.

In a similar way, the subsequent signal F, which is created when responding to the second character, switches the counter 21 by one step so that it now creates outputs Ά and B to make the AND gate 17 c effective and the third Enter characters in register 12 c. That

ίο register 12 d is fed in a similar manner, when the counter signals A and B manages.

However, as shown in Fig. 3, the outputs of the counter 21, which provide the signals A and B , are still supplied to make an AND gate 27 effective. After a period of time determined by the delay device 29, which is sufficient for the fourth character to be entered in the register 12 if, the output signal of the AND gate 27 is sent to the setting input of the

ίο Flip-flop 25 applied in order to terminate the signal E at its 0 output and to initiate a signal E from the 1 output of the flip-flop 25. Since the AND gates 17a to 17d are not conditioned by the signal E such that a is input to 17 d in the register 17, subsequent characters can not be input to these registers in the row.

However, the AND gates 19a to 19d have the signal E from the flip-flop 25 as one of their conditioning signals. The output lines of the counter 23 are connected to the AND gate 19 α in such a way that the gate is conditioned by the signals B and C which occur when the counter 23 is in its 0 state. Since the counter 23 initially shows 0, the AND gate 19 α is made effective when the flip-flop 25 changes its state in order to create its signal E. In this way, the fifth character is entered in the register 14 a. Like the counter 21, the counter 23 is incremented by successive signals F. These signals are supplied via an AND gate 31, which is conditioned by the signal E from the 1 output of the flip-flop 25. The delay device 29 is further selected so that the pulse F, which appears when responding to the fourth character, is ended before the AND gate 31 is conditioned by the signal E. An undesired advance of the counter 23 would otherwise result.

The signal F., which appears when responding to the fifth character, goes through a delay device 33. to increment the counter 23 so that it now creates outputs C and Z5. The output lines of the counter are connected to the AND gate 19 ft, so that the gate is activated, to enter the sixth character in the 14 ft register.

Similarly, the seventh and eighth characters are entered in registers 14c and 14d, respectively.

give.

When the eighth character is entered, the counter 23 provides signals D and C which are fed back to its reset input via an AND gate 35, a delay device 37 and an OR gate 39

€ 5 will be. The delay device 37 is provided to enable the AND gate 19 is energized and the register 14 d d charged before the signals D and C are finished. The delay

309 539/485

ίο

37 is further selected so that the pulse F, which occurs in response to the eighth character is ended before the counter reset to 0 ^lst 23 "," .. _. "", _R

As the flip-flop 25 continues to output a signal E and

not to create em signal Έ , the AND gates 19 and not the AND gates 17 remain conditioned. When it returns to its 0 position, the counter 23 puts the next, the ninth character in the register 19 «U ^ jTh? η ^ZUV ° ^r _t ^with , Ζ ¹ "^"., ^ ichen made. The tenth, eleventh and twelfth characters are entered in registers 196, 19c and 19d , respectively. Similarly, the thirteenth, fourteenth, fifteenth, and sixteenth as well

SÄÄiX ⁱⁿ

zu ^ S ^ ^ fTi i · * * «™ Α pos1 _tl vfun Γat ^ β

to the 77th character in the line successive rectangular pulse of fixed duration if they are vln

entered in the register 19 _fl . The sixth, ignition pulse will be energized The mh 32 «to 32 ™

The tenth ... and 78th characters are consecutively 20 signed TreihprstrnmW * · ■ aa ^D1S _.,

then entered in register 19 *. The seventh, ΐ? Κ / ίί5ΤΑϊί, ί £ Α5

eleventh. . and 79th characters are stored in the net. The drivers marked 34 «to 34 d ! Γ

14 c entered. The eighth, twelfth ... and 80th circles are the ^reactorid I lrei ° ^erstrom

Characters are entered consecutively in the Spa'K 'bf / Ädίο "register

14d entered. Every fourth character (starting with 25 the registers 14 Hi ih;

associated with registers 12 or 14, like the comparison means 28. When one of these AND gates 30 is ^{activated, an ignition pulse is provided to a} hammer driver circuit 32 or 34 in order to activate a hammer

As those used in common logical systems Voltage levels are relatively low and can typically be +4 volts and -2 volts the output signals of the AND gates 30 (the ignition ίο pulses) do not directly drive the hammer be used. Accordingly, driver circuitry is required to provide an output of sufficient size to provide the hammering response to the output signals from the AND

new / ceiie the signal CK from the function decoder 16 (Fig. 2a) to the Λ inputs of the flip-flop 25 and to the counters 21 and 23 applied. As a result, these elements are set in such a way that they cause the characters for the new line to be entered in registers 12 "to Ud and 14" to Ud , as has been previously described ^8g

According to FIGS. 2a and 2b, coded data are assigned to each register 12 and 14 and are supplied which indicate the character stored in it, to be precise via a cable to a comparison device 28 "to 28 /, (FIG. _8. 2b). Each of these comparison devices 28 receives the coded signals via a cable 8 from the light sensing device 7 (FIG. 1). The comparator thus receives signals indicative of the particular series of type characters (or the series of spaces) on the rotary drum which is approaching the ureters. If the encoded signals from a register 12 or 14 or from the light sensing device 7 represent an identical type symbol, the drum is in such a position that the particular type symbol on the drum which corresponds to the symbol in the register is closed by a hammer when the hammer is excited ^ is posted at this point in time. Each comparison device then creates a positive signal at its output. The delay period that occurs between the time the light sensing device 7 (Fig. 1) senses light indicating a mark to be printed and the time the hammer actually strikes the mark is compensated for by the disk 5 precedes or precedes the characters on the drum by an appropriate distance.

If the input signals to a comparison device are identical and a match occurs, does the comparison device deliver its output ^? gangss _lg nal AND gates 30a ft to one of eight to 30. Each of these AND gates 30 is one of Rebis 40RF, which are described below.

Each of the AND gates 30 receives the clock pulses from the light-sensitive device as conditioning inputs? (Fig. 1) and the "
signal from a comparator 28.
A clock pulse 5 is given to each UN ^ "~ -

leads so that it has its ignition pulse
signal only creates if the υ
is in such a position that none of the type symbols is adjacent to the hammers when the hammers are on the drum 1.

4 "beat.

Each of the AND gates 30 «to 30d , which creates ignition pulses for the first four columns, has a signal hC as an additional activation signal. uas signal FC indicates that the paper feed

κ gang ar occurs just before the printing device completes printing a new line. Obviously, it is not desirable to use the m the columns at the beginning of a line (columns 1 to 4 at the '"·

to ignite until that
a new one to print
Signal FC is the
supplied as assumed ^
been advanced

Column 5 begins.

The function decoder 16 creates a signal LF,

jS U £ £ ^e RRT ^{is deleted} 'advance ^the P ^{Pa ier.}

Sh £? £ ^alLF . ^one input of a binary

™ ,? ^Se f ^{ate Fig} · ⁵ "led to him by a

Payment of 1 upstream. The number of signals

LF is counted by the counter 42, and this information

Pao he, " ^{em Pa} P ^ierv ° rerschub fed to the

3Sltrt η - ^{es Pecified} number of times continued-

6, pX? « U ^Every step in progress the man succeeds in

Sf F? „· ^{B a} ^ gnal LC, which indicates that

Pre SchnhP • ^e r _i ^{n-th line} spacing ^Prechend

IfninoH ^1St v- ?, ^{as signal LC is sent} to the other

Input of the counter 42 applied to its counting

^{fo rt} _H S ^{it (: hold is.}

- = a: fl

12th

11

S3 £? Sfj

se

the

uc _ß

display these coded signals

_{rf 19 coils}

this blocking function is in F "In the circle there was

ung 58 could

_{of 30 den} ^ Tue ^:

of course _{execution se} in.

th signals in a register he 12 ode τ Ue ^ _{on D} ; _e rdm contacts m of the _joint
space? SStromkreis 34 "his training and the signals handled within the itch to Z * ^« L ?? S on deni Kabe ^ ¹ ^ _mkreise 35, representing about de η T Reibers tr ^ _Who space, d ^ e ^ be Re ^ _{n gangsl} nipuls delivers, "enn es _{g6 qs} , locked, and there is no printing _{- one of} the ^{R5 ]} . ^ai J ° ⁿ J ^ Vo _an «iinpuls from the driver a correspondence in one de: S _{by sending W} rd the output impulse of _{the loader}

those

_g ^ _{fio actuated}

Hammer bobbins 52

50 arranged to be sicn

to close their associated contact 56 ο. The AND gates in group 64 each have two inputs. Each of the inputs is connected to one of the outputs from the lower order stages, 1 and 2, of the binary counter. The connections between these AND gates and the counter 62 are such that each gate is actuated by a particular combination of the two lower order bits in the binary coded number presented by the outputs of the counters. In this manner, the AND gates 64 are actuated by the low two stages order of the counter 62 in a manner similar to the manner in which the AND gates 17a to lld and 19a to 19 d (FIG. 2a) through the Counters 21 and 23 are activated (Fig. 3). Different AND gates in group 64 are actuated for different combinations of the two lower order bits. Progress through the levels or states 1 and 2 of the counter leads to successive actuation of the AND gates in group 64. Since each of the AND gates in this group energizes a relay in group 56, successive incrementing of the counter leads to successive energization of the Relay in group 56.

The other group of AND gates 66 consists of five gates. The output of each AND gate in this group is connected to one of the relays, whereupon a relay coil 58 ft is energized by making an AND gate 66 active and its associated contact 58 a is closed to switch a conductor 48 to the voltage source - V. The AND gates in this group 66 have three inputs which are connected to the outputs from the higher order stages (4, 8 and 16) of the counter 62. Similar to the connections between the AND gates in group 64 and the counter, the connections between the AND gates in group 66 and the counter are such that each gate is represented by a particular combination of the three higher order bits in the binary coded number is actuated, which is represented by the output of the counter. Different combinations of the three higher order bits operate different AND gates. Switching the counter forward leads to successive actuation of the AND gates in group 66. Successive actuation of these AND gates leads to successive actuation of the relays in group 58.

Each setting of the counter leads to an actuation of an AND gate in each of the groups 64 and 66. Upward switching of the counter by successive pulses at its one input leads to successive actuation of selected pairs of gates, the gates of each pair in different Groups are. Each of these pairs of AND gates energizes a relay in each of groups 56 and 58 to establish a current path from the driver circuit 34 α via a selected hammer coil 52 to the To create reference potential.

A small driver circuit 68 is assigned to each of the AND gates in the group 64 and 66, with the is connected to the exit of the gate. These act in the usual way to reduce the output level of the AND gates to a sufficiently high voltage to operate the relays.

As shown in FIGS. 2b and 4, the pulses for switching the counter 62 upwards are applied via a delay device 70 a from the AND gate 3Oe, which creates the ignition pulse for the driver clean circuit 34 a and the hammer selection circuit 40 a thus switches after Each ignition pulse energizes the driver circuit 34 a to enegen one of the 19 hammer coils 52 in the hammer selection circuit 40 a, this ignition pulse the counter 62 by one step, so that a new hammer coil 52 is selected in the circuit 40 a. This new hammer coil is excited by the next output pulse of the hammer driver circuit 34 a.In a similar way, the ignition pulses from the AND gates 30 / to 30/1 are applied via delay devices 706 to 70 d to forward the counters in the hammer selection circuits 40 b to 4Od switch.

The counter 62 according to FIG. 4 is reset by the output of an OR gate 72 which is excited by the output of one of two AND gates 74,75. The AND gate 74 has five inputs. These are connected to those output lines of the counter 62 which are excited when the counter represents the binary number IUO10. When the counter represents this number, the 19th hammer, ie the hammer located in column 77, is actuated. These output lines of the counter 62 energize the AND gate 74 which creates a signal LP and after a period of time determined by a delay device 76 energizes the OR gate 72 in order to reset the counter 62. In this manner, AND gate 74 and delays 76 cause the counter to be reset after all of the hammers in its hammer select circuit have been energized.

The AND gate 75 has three inputs and is activated by simultaneously receiving signals A, B and E from the counter 21 and the one shown in FIG. 3 flip-flop 25 shown receives. These signals appear when the fourth character of a line is entered in the register YId (FIG. 2). Since the hammer selection circuit 40a of FIG. 4 is used for printing in column 5, the signals A, B and Έ reset the counter 62, so that the hammer coil for column 5 is connected to the driver circuit 34a for a sufficiently long time, to print in the fifth column. Similarly, the signals A, B and Έ are applied to the unillustrated counters in the hammer selection circuits 40 b to 40 a ¹ in order to reset them in sufficient time to print in the sixth, seventh and eighth columns.

Way of working

An example of the operation of the printing apparatus is described below. It is assumed that the type drum 1 rotates at 2000 revolutions per minute. Since each column of the drum 1 contains a type set, it takes 30 milliseconds to move a complete type set past the hammers 4. Assume further that a complete input character is received by the printing device every 7.5 milliseconds. It is further assumed that, in the telecommunication system used, the commands issued with respect to a new line and fed to the printing device consist of signals CR, CR, CR, LF , that is, three carriage return commands and one line feed command.

15 16

The light sensing device 7 shown in Fig. 1 enter the register 12 b. The comparison facility

continuously creates periodic clocking 28 b, the AND gate 30 b and the driver current

pulse 5 as well as signals that print the rows of circle 32b according to FIG. 2b then the second

Type characters or the series of spaces identify characters in the same way as described above in

when they get close to Jen hammers. The 5 binding with the first character has been described

A series of clock pulses is sent to the AND gates 30

measure F i g. 2b supplied while the the characters below are those in the remainder of the begin- or signals identifying the blank space to the pointing devices to be printed in the columns (columns 3 and 4) 28 are fed. are fed to the printing device and at the same time

According to FIGS. 2a, 2b and 6, the first character occurs when printed like the characters in the column

Chen the line to be printed in the register 10th I and 2.

(Fig. 2a), in serial bit form. Since the drum 1 has a complete set of types, registers 10 converts the bits representing the characters past each column only every 30 milliseconds from the serial form to the parallel form and delivers this data to the registers 12 and 14 every 7.5 milliseconds of the printing device and the 15 are supplied, the characters cannot function decoders 16. The input data will be printed at the time it is received by the bit counter 20 and the conversion register 10. A delay period can be added. When enough bits are sensed. occur until the mark on the drum, which indicates that a mark is to be printed by the printer, reaches the hammers. The newspaper has been supplied (for example six bits 20 are stored in registers 12a to YId in the case of a six-bit code), the bit counter sets the flipchert until in the corresponding comparator flop 18, which operates the function decoder 16 28a to 28d makes a match displayed sam. The output signal of the bit counter will be.

is also used to reset it and the reference to columns 5 to 8 should be noted. Flip-flop 18 reset after a delay. 25 that the hammer selection circuits 40a to 40d on the delay element 22 generated are initially set so that when the driver is. The function decoder 16 delivers a signal F circuits 34 a to 34 d are energized, they activate the hammers 5, 6, 7 or 8, assuming that a character in column 1. When the fourth of the line is to be printed. Characters entered in the register 12 d creates

According to Fig. 2a. 3 and 6 are at 30 of the counter 21 (Fig. 3) signals A and B, which activate the beginning of a new line, the counters 21 and 23 on AND gate 27 and the flip-flop 25 in their ( "Position, and the flip-flop 25 order so that it delivers a signal E. This finds itself in its reset state. Accordingly, the output signal of the AND gate 27 is initially the signals A ~, B, CD and E. gerungsein direction 29 out so that the flip-flop The AND gate 17a is through the signals ~ Ä, Ή and E 35 25 can continue to deliver its signal Έ until this is made effective at the first character of the line is entered in the fourth character in the register 12d. Enter the register 12a. When the signal E appears, it activates the AND-

Of course, AND gate 30a receives gate 19a. since this gate already has its conditioning

According to FIG. 2b, its conditioning signal FC, since it receives input inputs C and D from counter 23.

Counter 42 (Fig. 5) indicating that line feed 40 is in its 0 position. To this

commands LF are not yet to be executed, so the AND gate 19a loads the register 14a with zero

represents. with the next or fifth character.

In this way, when the signal F appearing in column 1 to The character which is to be printed in response to the fifth character is stored in register 12a, the signal F is applied to switch the counter 23 and the AND gate 30 up its conditioning signal 45, so that it receives signals C and 75, the sign is printed when a match occurs. the AND gate 19b is activated and the sixth mood in the comparison device 28 a fixed character is entered in the register 14 ft. This signal F is provided and the clock pulse S is sent to the AND gate via the AND gate 31 (which is applied by the Si-30. The match in the signal E is conditioned by the flip-flop 25) and the same device occurs when the light sensing device 50 applies the delay device 33, which direction 7 delays a coded output signal identical to switching the counter 23 upwards until it creates the coded signals which the Regi signals C and Z5 has delivered.

ster 12a represent stored characters. In this case, the registers 14c and 14d are

The character will appear for column 1 and the eighth character in the same

printed by the AND gate 30a a firing pulse 55 manner as the register 14a and 14 b charged. the

supplies to the driver circuit 32a corresponding to the characters to be printed in columns 5 to 8

to excite column 1. This firing pulse is DA, after the einge- d in the register 14a to 14

according to the delete input of register 12 a, printed in the way they are in connection

placed. application has been described with columns 1 to 4.

According to FIGS. 2a and 3, the signal F, wel- 60 After each driver circuit 34a to 34a * this is supplied by the function decoder 16 i ^c , t, via ignition pulses from the AND gates 30e to the delay device 27 at the one input 30 h is excited, the ignition pulses are applied via the past of the counter 21 after the AND delay devices 70a to 70d has been made ineffective at the hammer gate 17a, in order to apply the selection circuits 40a to 40d. Enter every first character in register 12a. Here- 65 firing pulse switches the hammer selection circuit through the meter is turned forward, so that it proceeds, so that manages at completion of pressing in the now signals A and Έ to the gate and column 5 the hammer selection circuit 40a now-17 b effectively make and the second character in more the hammer to be printed in column 9

In a similar way, when you finished pressing in columns 6, 7 and 8 , hammer selection circuits 40 b, 40 c and 40d have now selected those hammers that print in columns 10, 11 and 12, respectively. S.

When the eighth character is entered in the register 14 d, the counter 23 supplies signals C and D, which activate the AND gate 35 (F i g. 3). After a period of time determined by the delay device 37 which is sufficient to enter the eighth character, the output of the AND gate 35 is fed to the reset input of the counter 23 via the OR gate 59. In this way the counter 23 is again in the 0 position and it supplies signals U and 25. If the flip-flop 25 continues to supply a signal E , the AND gate 19a is activated to the next or ninth Characters in the line to be entered in register 14 a. The character for column 9 is then printed via the corresponding comparison device 28 e, the AND gate 30e, the 1 driver circuit 34 a and the hammer selection circuit 40 a. These elements work like this. as indicated in the description of the pressing in the previous columns.

Subsequent columns, i. H. columns 10. 11 and 12, are printed in the same way as columns 6, 7 and 8 above.

The character to be printed in column 13 will be like this printed like the characters in columns 5 and 9. The hammer selection circuit 40 ″ has column 13 selected after being advanced by the ignition pulse or is advanced that caused the printing in column 9.

All other subsequent columns are printed in a similar way.

Whenever data has a space or a Show spaces that are fed to the printing device, these will be considered as any usual too treated character. These data are entered in a register (12 or 14) and converted to a Comparison device 28 performed. If the cable 8 supplies identical data to the comparator, the comparison device conditions an AND gate 30, which in turn supplies an ignition pulse, to activate a driver circuit 32 or 34.

However, the data supplied via the cable 8 at this point in time continues to be sent to the dummy decoder 41 out, which provides a signal to disable the driver circuit. This is how in there is no printing on this column and a space is left.

There are four character registers 14, which are assigned to columns 5 to 80. These enable that the printing device receives a character every 7.5 milliseconds, although the Printing drum 1 presents the hammers with a complete set of types only every 30 milliseconds. That that is, four characters can be saved at a time and recorded so that no data is lost. The characters are in the four registers 14 stored until the drum 1 rotates enough to the characters to be printed Performing hammering. The amount of memory circuitry required (i.e. sufficient to include four characters record) is ensured that the time it takes the drum 1 to Hammer to perform a full set of characters, divided by the time interval in which consecutive input characters are received.

When a new line is to be printed, the document is fed to present a new area to the hammers. In addition, the control circuitry of the printing device must cause the next received character in column 1 to be printed. Usually, a new line is initiated by three successive CA (carriage return) signals on the incoming data line, followed by an LF (line feed) signal. These four signals each take 7.5 milliseconds and therefore a total time of 30 milliseconds. They therefore create enough time for the printing of a character in the last column of the previous line, since this printing does not take more than 30 milliseconds, ie not more than the time required for the drum 1 to be able to present a complete set of types.

When such signals CR and LF initiate a new line, the counters 21 and 23 (FIG. 3) are held back and reset by each of the signals CR, and the flip-flop 25 is also reset to zero. The signal /.F switches the binary counter 42 (FIG. 5) forward so that its output lines represent 1. This signal is fed to the paper feed device 3, which upon completion of the paper feed process supplies a signal LC in order to count the counter 42 back to zero. The AND gate 44 determines that the counter 42 is at 0, and it supplies the signal FC to the AND gates 30a to 30d, which are assigned to the beginning four columns.

It goes without saying that the paper feed device 3 requires a period of time to operate. During this period, characters continue to be received by the printing device, and accordingly the memory device must be able to accommodate these characters, since printing cannot take place during the paper feeding operation. These characters at the beginning of a new line to be entered successively in the register 12a to 12 d, and in the same way as the sign of the columns 1 to 4 in the previous line. When the paper feed ends, the AND Iore 30α to 30d receive their signal FC, which indicates the end of the paper feed. When activated in this way, they provide the ignition pulses. which are necessary to energize the driver circuits 32 for columns 1 to 4 of this new row. In this way the characters in the beginning columns (ie in columns 1 to 4) are not lost during the paper feeding process. They are stored in registers 12a to 12rf.

However, in either case, enough memory circuitry is provided to store each character, which should be printed in one of the beginning columns.

The characters to be printed in the remaining columns 5 to SO of the new line are displayed in the printed in the same way as on the previous line.

In the following, with reference to FIG. 4 to 7 the operation of the hammer selection circuit 40 ο is described. As mentioned above, the circuit 40a successively connects the tolerance circuit 34a with the hammers 4 in columns 5, 9 ... 77.

Although only the operation of the HammerauswahLätromkreises40a will be described, the other selection circuits 40 operate b to 40 d in an identical manner. For printing in column 5, the counter 62 had to be reset to 0 by the output of the OR gate 72, which was activated by the signals A, B and Έ , which appear when the fourth character in the register 12 d (Fig. - "- a). Alternatively, the AND gate 74 is activated, provided that a character has been printed in the last column (column 77) associated with the hammer selection circuit 40a , in order to reset the counter 62 with a signal LP, via the delay means 76 and the OR gate 72. In any case, now appear positive signals on all five O-output lines ^J .es counter. the aND gates 66 a and 64 ,? in the groups 66 and 64 are activated by these output signals and become active to energize their associated relay. As a result, a conductive path is provided on the hammer coil which is associated with the column 5 and designated α 52. energized in this way, the first Output pulse from the driver circuit 34 «after the beginning of a new line the hammer to print in column 5. The ignition pulse from the AND gate 30e (Fig. 2b), which first excited the driver circuit 34 ″, is applied to one input of the counter 62 via the delay device 70 ″.

Of course, the delay 70 a is so cooled that that there is sufficient time for the counter 62 not to be incremented until the hammer has been activated in column 5.

This ignition pulse switches the counter 62 forward so that it now energizes the AND gates 64 ft and 66 α. These AND gates energize their associated relays, to a conductive path through which the column 9 associated with 52 b designated coil is energized thereby when the driver circuit 34a provides its next output pulse.

The remaining hammer coils connected to hammer select circuit 40λ are shown in similarly excited. F i g. 7 shows the time relationships between the bits on the output lines of counter 62 and AND gates 64 and 66 are shown. Only some of the AND gates are indicated as they are explained.

As mentioned above, the 0 outputs of the counter 62 are all positive, so that the binary number 00000 (decimal 0) is shown in column 5 for printing. Thus, FIG. 7 for column 5 that the outputs of all stages in the counter represent 0 bits. These output signals activate the AND gates 64a and 66 ″.

For printing in the ninth column, the binary number 00001 (decimal 1) is entered through the outputs of the Counter shown. The outputs of all stages with the exception of stage number 1 represent 0 bits. This activates the AND gates 64 /) and 66 «, thereby creating a conductive path through the ninth column assigned hammer coil to create.

For the 77th column, the numerator has gone a long way vorbeweat. until it has the binary number 10010 (De / .imal IS) represents. This activates the AND gates 64c and 66c, which have a conductive path via the Create 52 c designated hammer coil, which is assigned to the 77th column

In summary, it can therefore be seen that before the printing device by means of the method described prints all characters continuously fed in and arranged in series with a minimal amount of memory circuit. Characters to be printed in the beginning columns, i.e. characters to be printed in columns 1 to 4, go during the line feed process not lost. The registers Ua to Ud, one of which is assigned to one of these starting columns, are provided for this purpose. For the remaining columns, columns 5 to 80, only four single-character registers 14 a to 14 a "are required, since memory circuitry is only required for storing four characters. The number of characters that have to be stored, ie four characters, is thereby obtained that the period of time it takes for the drum to present a complete set of types to the hammers is divided by the time interval between successive input characters.

Although the remote printing device described above has a separate fixed hammer for has each column, the invention can be practiced in a remote printing device having a Has hammer mechanism that moves on a carriage over the document to add a line to press. In such a printing device, the columns at the beginning of each line (e.g. the first four columns) each a single stationary hammer, and the moving one Hammer mechanism only prints in the remaining columns. This enables printing of "/ calibrate in the beginning columns without waiting for the carriage return. Memory circuit is intended for the characters to be printed in the beginning columns in order to prevent their loss during the Line feed process. that occurs at the beginning of each line. Preferably includes this memory circuit single character register, d. H. a register storing a single character like the described preferred embodiment of the invention.

The moving carriage contains several hammers and performs the printing in the remaining columns in Cycles out being printed in multiple columns by the multiple hammer during each cycle will. The number of characters that must be stored at a time. is essentially the same as that The ratio of the time it takes for the drum to display a character set to the time interval between successive input counts. Furthermore, a number is preferred is used by registers storing one character each, each register being a character to be printed characters to be printed in each cycle and successively in successive cycles stores? In this way, this remote printing device needs also only a minimum of memory circuitry such as that described in detail above Remote printing device.

For this purpose 3 sheets of drawings

Claims (2)

from a pressure control to the printing elements. Numerous printing devices have been developed 1. Line-by-line printing device has been used for line printing of information in of characters with additional control characters 5 form of coded electrical signals that the for the line feed as coded signals continuous printing device from a data processing nuierlich received and fed in a series of at least one system. Such prepress two-part storage device, generally referred to as a teleprinter are stored, with the characters being used for printing, are used to a large extent chensignals from the storage device to print xo information that is transmitted via message men and have been transmitted under control by pressure control lines. Your printing mechanism signals from a print control the print element is usually on a carriage or ments are supplied, thereby marked carriage attached, when the data is received draws that while being received by a, from left to right across the document Genes control character (CR, Lh ") is moved for a line 15 to be printed on, However, the carriage has to start a new one device return to the next line to be printed line to the left of the document, the print control (9, 42, 44) does not generate any printing during this process of a signal (FC) prevents actuation from taking place, must be done during this time of the printing elements (32a ... 32d) enables ao received input data to be the inherited part (12a ... lld) of the storage device will be saved, or they will be lost. Storage tion (12a ... \ 2d, 14a ... 14d) one after the register or buffer register are usually used for Line feed starting group provided for this purpose. Character signals stores that after completion Other teleprinter not use up bewedes adjustment process first, constricting the first part 25 cars, but they look instead for (12 a ... 12 d) of the memory device CONNECTED each column in the printed line a stationary These printing elements (32a ... 32d) are provided in this printing mechanism. With this printing device part stored characters under the control of gen, the print control signals (8.5) required for the carriage return are therefore not required for the first time, and the problem caused by printing the new line in parallel printing 30 the carriage return is avoided second part (14a ... IAd) of the storage end. If, however, a new line is started, the means that on the beginning group of the document on which is being printed must be moved following character elements arriving characters in such a way that the printing mechanism stores signals and that additional space is presented on this. This than Zeilenvorzweiten part of the memory means CONNECTED 35 relapsing designated operation requires as the Wagensene more printing elements (34a ... 34d. Return a certain time. Accordingly must 40a ... 4OD) stored therein data imprinting device supplied mark during this succession in the order in which they arrive, the period of time are also saved because they print in the following print locations, in which case they will also be lost. Number of the second part (14a ... 14d) of the 40 From the German patent specification 1,199,033 is a storage device number contained of device is known which of the above-mentioned memory elements (14a ... 14d) less than the printing device corresponds and the information in a buffer for the printing positions, also supplied in the number of the series following the first printing positions, is that each of the further printing memories is temporarily stored and the content 45 is printed out one after the other from elements (34a ... 34d, 40a ... 40d). The buffer memory serves here to store the assigned memory element (14α ... 14d) at least the memory elements which are then subsequently erased during the adjustment to the after each printing and for the information arriving on the next line. However, the speed of the incoming character signals must be stored. incoming information be slower than the 2. Printing device according to claim 1, there being 50 maximum printing speed between two times characterized in that the second part of the leneinstellvorgangs, since there is no information storage device during this a plurality of stored mation can be printed out, elements (14a ... 14d) contains, each object of the invention is to provide a Druckvorricheinem Your own printing element (34a ... 34d, to specify the device with the maximum printing speed 40a ... 4Od) are assigned and that every 55 digkeit continuously arriving characters at Ver-Druckelement in several subsequent pressure sections of a buffer tank with minimal play prints. without losing characters as the paper advances. The invention solves this problem by the fact that during 60 of the received control character for a