DE2648871C3 - Method for the coded identification of forms or the like. And device for carrying out the method - Google Patents

Description

- that the code characters are printed in the form of horizontal lines,

- That the form for printing the code characters is transported in steps that one Fraction of the smallest normalized carriage return, and

- that after each of these transport steps a printing process for the code characters (horizontal Dashes) in one of the two columns.

2. The method according to claim 1, characterized in that the form feed is digital is controlled and the subdivision of the transport steps is carried out digitally.

3. The method according to claim 1 or 2, characterized in that the readability of the printed Code characters are checked by checking the characters with reduced sensitivity will.

4. Device for performing the method according to one of the preceding claims with a Transport device for the forms, characterized in that in a manner known per se a Taki pulse generator is coupled to the transport device, which changes each form feed a standardized line circuit outputs a predetermined number of clock pulses which are fed to a counter that the counter can be switched over according to the one corresponding to a full line break Number of clock pulses or, after a fraction of this clock pulse, a stopping the form transport Emits stop signal and that the restart of the transport device after each completed printing process he follows.

5. Apparatus according to claim 4, characterized in that that the transport device has a drive roller and the clock pulse generator a photoelectrically scanned one which meshes with the drive roller via gears Perforated disc is.

6. Apparatus according to claim 5, characterized in that the perforated disc has 16 holes, is driven by the drive roller with one full revolution per standardized line circuit, and that the counter can be switched so that it is either after 16 or after every 4 clock pulse? η emits the stop signal.

7. Device according to one of claims 4 to 6, characterized in that a code reader for Reading and control reading of the printed characters is provided, and that when switching the Counter to the smaller number of pulses the sensitivity of the code reader is reduced.

8. Apparatus according to claim 7, characterized in that the code reader is a photoelectric The reader is the lamp illuminating the code characters and receiving the reflected light Has photocells, and that when you switch the counter, the Lampensirom is reduced.

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The invention relates to a method for the coded identification of forms or the like. According to the Preamble of claim 1.

Printing office machines are being used to a large extent for the automatic printing of individual forms used. To ensure that this is actually the case for the respective purpose provided form is described by the office machine, it is known to use the forms to provide a coded identification that is read by the office machine for control.

So far, separate devices have been used to apply such coded markings, which are very complex, require a lot of space or use cumbersome code characters.

From DE-OS 14 49 621 a method is known in which by means of a printing device on a common recording medium in addition to a recording of analog quantities code characters in binary code printed in two vertical columns. These code characters give in numerical form the parallel to do this, the analog values printed out again. The code characters are accordingly over the entire Record carriers distributed and are not used to identify the record carrier or any other form.

The invention is based on the object, in a method of the type mentioned at the outset, the encoded Identification of the forms or the like easier and more space-saving to apply.

According to the invention, this object is achieved by the features of the characterizing part of claim 1.

In contrast to the known method, according to the invention, the coded identification is applied to the forms with the same printing office machine that reads this coding for form recognition and is used for describing the forms during organizational processing. All additional devices for applying the coded identification can therefore be dispensed with. This means a significant reduction in costs and space requirements. Printing takes place with the usual office machines with standardized line breaks. The smallest possible line spacing is usually V ₆ ZoII (4.233 mm) in exceptional cases also '/ "inches. This standardized line arrangement of the usual office machines would lead to a considerable amount of space being required on the form when the information necessary for clear identification is printed on in coded form. According to the invention, this is avoided in that, when the coded identification is applied, the line feed of the form feed takes place in steps which are only a fraction of the smallest standardized line feed. Such a line break cannot usually be used, since it leads to the characters of the successive lines being written one inside the other. According to the invention, however, the small line spacing can be used in that horizontal lines are used as code characters, which are used for coding in the binary system.

In the method according to the invention, the form feed is expediently controlled digitally and the division of the transport steps is carried out digitally. The digital control makes it easier the subdivision of the normal line feed into the line feed for the inventive Code description.

Since, according to the invention, the code characters for the form identification are attached in a very narrow space it is essential that the legibility of this coded identification is ensured in every case is. For this purpose, in a further development of the invention, the legibility of the printed code characters is checked, by checking the characters with reduced sensitivity. Will the code characters still reliable after printing by the reading device even with reduced reading sensitivity read, this ensures that these characters are also read with full reading sensitivity if they fade over time or if their legibility deteriorates for other reasons.

A device with a transport device for the forms is suitable for carrying out the method according to the invention, which device is characterized according to the invention by the features of the characterizing part of claim 4. in which a clock pulse generator is coupled to the transport device to generate a larger line spacing required for the page separation after a predetermined number of lines. that controls a counter.

The direct coupling of a clock pulse generator with the transport device makes it extremely easy Digital control of the line feed is possible. The exact definition of the line feed is done by counting the clock pulses. An extremely simple division of the Line switching to the reduced line spacing according to the invention is possible by the positioning for the next code character print already after a fraction of the clock pulse number the smallest normalized line break takes place. Switching can be done by a Hand sounder or program-controlled.

In an advantageous embodiment of the invention if the transport device has a drive roller and the clock pulse generator is an over Gears with the drive roller in engagement, photoelectrically scanned perforated disc. This results in A very precise match of the clock pulses for a digital one can be achieved with the simplest means Control with the actual form feed.

The perforated disc expediently has 16 holes, is driven by the drive roller with one full revolution per standardized line break, and the counter can be switched so that it emits the stop signal either after 16 or after 4 clock pulses. In this embodiment of the invention, the code characters for the form identification can be written with a line spacing which corresponds to a quarter of the smallest normalized line spacing. With the usual line spacing of V ₆ inches, this means a line spacing of 1.05 mm for the code characters.

To ensure the legibility of the characters immediately afterwards to check the pressure is, in a development of the invention, a code reader for reading and control reading of the printed characters is provided and the sensitivity of the code reader is reduced when switching the counter to the

■ o smaller number of pulses. Appropriately is the Code reader is a photoelectric reader that illuminates the code characters and reflected lamps Has light-absorbing photocells and when switching the counter, the lamp current is

'S decreased. This can be done, for example, by rejection-βίαηαε Od. Like. Happened automatically when switching to the smaller line circuit in the lamp circuit be switched on. Switching to the low reading sensitivity is therefore carried out

automatically together with the imprint of the code characters for the form identification, so that immediately after the code characters are applied, their legibility is automatically controlled by the program can be checked with a reduced reading sensitivity. Usually there is a reduction the light intensity to approx. 2% sufficient to reduce the legibility of the code characters Light intensity ensure that the coding at full reading sensitivity even under unfavorable

Conditions, e.g. B. with a strong fading, is safely read.

In the drawing is an exemplary embodiment for one applied by the method according to the invention Coding shown. It shows

1 shows an example of a binary code which is suitable for the method according to the invention, the Numbers from 0 to 9 are shown in this code, and

Fig. 2 true to scale a according to the invention

■ to MAESSEN method marked with the code of FIG Form.

The coding indicated in FIG. 1 is based on the known binary system. The code characters exist from horizontal lines arranged in two vertical columns arranged side by side are. The left column represents the value column, while the right column the complementary column or parity column. 4 consecutive lines form the coded representation of a

one of the numbers from 0 to 15.

In the example shown, a timing disk is provided with the transport device for the form 16 holes coupled, in which one revolution or 16 clock pulses of a standardized line circuit of

V _{equals 6} inches = 4.233 mm. For the coded identification of the form, the counter is divided by switching by hand or by program so that it no longer counts 16 clock pulses as with normal printing of the form and then stops the drive motor of the transport device in a known manner, but that this stopping and printing of the next code character occurs after 4 clock pulses. The vertical line spacing J of the individual code characters is therefore only ^[ / _u inches or approx. 1.06 mm.

For this purpose 2 sheets of drawings

Claims (1)

Patent claims: 1. Procedure for the coded identification of Forms od. DgL with the means of a used for describing the forms, printing Office machine printed on the form Code characters in binary code in two vertical columns are characterized by