DE2339285A1 - DYNAMICALLY CONTROLLED PRINTER - Google Patents

Description

BLÜMBACH ■ WESER · BERGEN & KRAMER O O O Ω O O P

PATENT LAWYERS IN WIESBADEN AND MÖNCHEN <£ <5 V \? £ O 5

8 MONKS 60

FLOSSMANNSTRASSE 15

73/8719

Kabushiki Kaisha Suwa Seikosha

lokyo, Japan

Shinshu Seiki Kabushiki iLaisha Suwa-shi, Japan

Dynamically controlled printer

The invention relates to a dynamically controlled printer with a printing part as a printing element of a device that has a Memory register is assigned. It thus relates to a printer assigned to a memory register in which the data are periodically written in and read out.

In general, two types of memories are in use. In the first type, namely the storage capacitor, the Data are only held if they are repeatedly written in and read out periodically. The second type, namely the magnetic core memory, the written data can be kept until a new signal is written. The term time segment or period of a storage register used in this application is intended to mean the period for the Understand reading and writing in a storage register

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used in a device for purposes other than the display is provided. In an electronic computer, for example, the period of the bit signals, the characters or the Memory cycles are understood that are read out and written for the purposes of computing.

The timing of an electronic computer is several to several hundred times faster than that of a printer. For this reason can, although a memory register for the calculation process in a computer and / or the visual display is provided, the signal from the memory register is not directly used as a control signal of the printing process, because the printing speed is not the writing and reading speed of the memory register is equivalent to. Accordingly, the control of the printing operation is carried out so that the contents of the memory register of the computer is written into a temporary storage register which can store the content until the printing process is completed. The contents of the buffer register are continuously read out for forwarding signals to the printer until the printing or activation of the characters is complete. This control method for the printer is therefore an indirect control method in which signals for selecting the characters to be printed are not taken directly from the memory register of the Hechners, but via a further buffer register in which the information is previously stored has been.

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In the case of an electronic visual display by means of luminous display elements on the other hand, the signals of the memory register provided for the sixing process can be used in the cycle of the calculating process are read out and written, are given directly to the display device to a visual display accordingly to achieve the scanning, since the display device with a speed corresponding to the timing of the computer can be operated. The sight display device can directly correspond to the read out from the memory register of the computer Signals are controlled

The invention is based on the object of direct control to enable a printer from a memory register at a higher speed than normal printing allows the memory content to be read and written periodically. The aim is to control the printer without a buffer register are made possible, and a simplification in the structure and in the control circuit is sought

The invention is characterized in that the printing part contains an element for generating printing characters, which is the display element corresponds to an electronic display device of the storage register

In this solution, as with the control of a display by

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Light elements, that is, as with a display device, the memory content corresponding to one cycle or several cycles of the signals read from the memory register in which the iiesen and Registered mail takes place periodically, printed immediately by forming print patterns. A buffer register for the selection the sign is therefore not required. In addition, highly integrated circuits can be used for the printer according to the invention, the control part of a cathode ray tube or the like of an electronic computer can be used as it is for a electronic display have been developed. Should an electronic calculator both with an electronic display as well as being equipped with a printer, then a common control part can be used, which results in low production costs If a printer is used, which is fully occupied when a certain number of identical signals is exceeded then it is not necessary to control the timing of the signals for selecting characters. Likewise it is not necessary with such a printer to bring the time cycle into agreement with the time cycle of the computer. It can be operated in a non-synchronous state.

The invention is explained in more detail by means of exemplary embodiments with the aid of five figures. Show it

Hg. 1 a control diagram for a display device by means of

Luminous segments
2 shows a control diagram for a pressure display by means of a

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Line printer

Pig. 3 is a control diagram for a printer according to the invention using segment-like thermosensitive Elements

Pig · 4 is a conceptual view of one suitable for the invention mechanical printer

Pig. 5 shows a dot printer suitable for the invention Use of a ferromagnetic material, where KLg. i> a the in control diagram and Pig. 5b an enlarged Represents a view of the actuator for the production of a point.

That in Pig. 1 shows the bloek diagram the control of a viewing device used in an electronic desktop computer with segment-like fluorescent tubes. Part 1 contains segments that represent characters and decimal points. The number 2 denotes Easter, the perform the scan. There is also a character counter 3 »a segment control part 4 with eight control lines of the eight segments used in the present Pail, a decoder 5 for converting the characters into segments, and a 4-bit register 6 into which the data from a main storage register 8 characters supplied can be written one after the other in the form of four bits. With 7 there is a 3-bit register denotes that the memory from the main storage register 8

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of the! computer delivered in a bit sequence into a parallel character -converts, which is given to the 4-bit register 6. Since the content is read out from the main storage register 8 as a bit sequence, on the other hand the decoder in each case the four bits required for one character at the same time is the conversion of the bit sequence into a parallel signal of four Bit required. The signal is then decoded to mark the selected segments in Part 1. The relevant Segments corresponding to characters are connected, and a scanning method in which only the sight tube is electrically Current is supplied to light them up, whose characters read in the 4-bit register 6 match that of the grid 2. A viewing tube can be controlled directly by the main storage register 8, since it is in a one character des ! The corresponding time period can be made to glow can.

Fig. 2 is a block diagram showing the control of a line printer of an electronic calculator. At 9 there is one Type roller denotes and 10 a drive shaft for the stop hammers. Signals that the normal position of the type roller 9 mark and which are referred to as Bückstellimpulse, are detected in a device 11 to the position of the type roller 9 to be brought into agreement with the data of the computer. The actuation signals for the stop hammers are dependent

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given by so-called control clock pulses of the device 12, which are output synchronously with the drive shaft 10. The content of the main memory register 20 of the computer is read out as a bit sequence and written into a 3-bit register 19. It is then stored in a 4-bit storage register 18 in the form of a parallel 4-bit signal as an indication of a digit. Numeral 13 denotes a counter which is reset by the device 11 and caused by the device 12 to count. It is synchronized with the clock control for the stop hanger. An EXCLUSIVE ODEE gate 17 makes the content of counters 13 and 18 equal. In other words, the timing of the printer is synchronous with that of the computer. Coincidence signals from the gate 17 are written into a buffer register 16 until a printer trigger magnet looks at it. The signals read out from the buffer register 16 are transmitted via an electromagnetic actuating device i? fed to a device for drive signals. "A stop hammer attracted by the device 14 is caught by means of a pawl 10 in order to strike the type roller 9 zn and to complete the printing process A circuit for detecting one revolution of the type roller 9 is also required.

As mentioned, each character requires the counter 13 for the timing of the hammer drive and a storage register 16,

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which is the latitude of the controlled signal for the facility 14 determined with a line printer.

Fig. 3 shows the block diagram of a controller for a thermosensitive Printer as a first embodiment of this invention. Denoted at 21 is a head which contains all characters as heat-emitting elements divided into segments. With 22 electrodes are referred to, which together each from one end of the heat-emitting elements of a character to the outside are led. 23 is a control part for the assembly 22. The remaining blocks operate equivalent to the corresponding blocks of the control circuit shown in FIG. 1 for fluorescent tubes. The assembly 26 corresponds to the segment st your part 4, the assembly 27 of the decoder 5, the assembly 28 to the 4-bit register 6 for one character, module 29 for the 3-bit register 7 $ which converts the bit row signal into a bit parallel signal, the module 30 to the main memory register 8 of the computer and the assembly 25 to the character counter 3 · the segment control part 26 generates identical signals in each memory cycle. If the common connection of the assembly 22 is conductive, the assembly 21 is supplied with an electrical heating current. After some Cycles, equilibrium has been established between heating and radiation of the heat-emitting elements and then this becomes thermal delicate paper printed. After completion of the printing process, the common electrodes of the assembly 23 are through

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the control circuit 24 is controlled so that the assembly 22 is switched off will. If it is provided that the block 21 is manually pressed onto the thermally sensitive paper, then the control circuit is 24 not required. In the present Pail, the segments are supplied with a current in the form of a pulse train until the Data can be changed, with the segment remaining in the state of thermal saturation and at any desired time on the thermal sensitive paper can be printed. In this respect, the same conditions apply as for the control of sight tubes before.

Fig. 4 shows the principle view of a further embodiment of this invention, namely in its application to a mechanical printer. An integrating wattmeter from the is used as the converter that converts electrical signals into mechanical signals Type of rectifier electric motor. The mechanical signals obtained by the transducer can be used in a dot printer will. With 33 "and 34 stationary excitation coils are designated, which generate a magnetic field proportional to a load current. Inside the magnetic field is an armature 32. See through a rectifier 31 and an ohm An electric current is fed into resistor 37. This is dependent on the action of the coils 33 and 34 on the armature 32 exerted a drive torque proportional to the load current in order to rotate the armature. The torque is generated via a worm 35

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transferred to a gear 36. This serves as a control element for segments, points or the selection of characters. When a mechanism connected to gear 36 is actuated to take a position during one or more periods of the memory register in which the print pattern is formed, gear 36 is brought to a stop by a stop. On the other hand, in a mechanism in which the load backlashing force and an average electric force obtained by integrating the data are balanced, the gear 36 stops even if thereafter see ^{through the rectifier 31 and the ohm 1} Resistor 37 a current flows. The printing is carried out, for example, by providing a point needle 38 in the stopped position of the gear 36, which presses against a pressure roller. If the character content is changed, then, in accordance with the actuation of the gearwheel 36, a back-up pawl comes into action, which establishes the initial state. Then the next character can be selected.

Pig. As a further embodiment, FIG. 5 shows a printer in which ferromagnetic material is used. According to FIG. 5 &, a ferromagnetic material arranged in 5 σ 7 points is assigned to each character in an assembly 39. With 41 i «« CLLe the X-axis and with 42 the Y-axis. An electromagnet X and an electromagnet 1 are assigned to each needle. Fig. $ B shows an enlarged sectional view of a point, with

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50 the needle made of ferromagnetisch.em material is designated, the electromagnets of the X-axis and the Y-axis are assigned. If an electric current is supplied to both the X-axis and the X-axis, a magnetic IPeId is generated that pushes the needle made of ferromagnetic material outwards, as indicated by an arrow. 40 are common electrodes of the electromagnets X and X for scanning, whereby only one character is made conductive by a number of characters *. A control part for the X-axes is denoted by 44 and a control part for the X-axes is denoted by 45. 46 is a decoder to recode the contents of the register into points (X, X). The modules 47 »48 and 49 work in the same way as the 4-bit register 6, the 3-bit register 7 and. the storage register 8 of FIG. 1 "If the needle is made of ferromagnetic material with the simultaneous occurrence of signals on the X-axis and on the X-axis ms. the distance 1 is shifted, then it is by the distance 1/2 vex "sob. <Vben _t we / m one of these signals occurs and by the distance 0 if no signal is present.

The printing takes place in such a way that in the period of the character signals supplied by the assembly 47 to the point needles 39 a print pattern is formed, a pressure roller or the like is pressed against the protruding needles, which with moving at a lower speed. Each point can be created by multiple contact with the pressure roller.

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because the character period of module 47 is shorter, than that of the platen. It is therefore also not necessary for the movement of the needles and the pressure roller to be synchronized.

Similar facilities are obtained by using an electrostrictive one Material instead of the ferromagnetic material or a material whose coefficient of expansion is large depending on a temperature difference. If the printhead is a If the thermosensitive printer contains characters in dot form, the same control method as described above can be used has been described with ferromagnetic material.

Vie has been described in detail with reference to FIGS. 3 to 5, the invention can be applied to all devices which are intended to store the content of a storage register, which is periodically is read out and written to be brought to the display immediately by means of printing patterns, regardless of the printing method. A mechanical, a thermosensitive, a static, an electrolytic, a ferromagnetic, an electrostrictive method, a printing method by spraying ink, and a method using Ultrasonic waves etc.

The main advantage of this invention is that the control circuit can be simplified. Another advantage is that the establishment in relation to the ßatti-

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tion is stable even if the forming the print pattern A farmer's signal is fed to the mechanism. The quality of the print is not affected even if the formation of the bridging pattern is started at an arbitrary bit signal during a storage cycle of a storage register and in general after saturation, even if the formation of the print pattern is interrupted at an arbitrary memory cycle or an arbitrary bit signal.

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Claims (3)

7339285 Pat ent claims Dynamically controlled printer with a printing part as a printing element a device which is assigned to a storage register, characterized in that, that the printing part contains an element for generating printing characters, which is the display element of an electronic display device of the storage register. 2. Printer according to claim 1, characterized in that net that the element for generating printing characters integrating element includes. 3. Printer according to claim 1 or 2, characterized in that a printing element is used at that without synchronization of the time segments of the memory register and the printer started printing with an arbitrary bit signal of the memory register and with an arbitrary one Bit signal can be terminated » 409808/0872 Blank page