FR91874E - - Google Patents

Description

FRENCH REPUBLIC

MINISTRY OF INDUSTRY

ADDITION

THE PATENT OF INVENTION

INDUSTRIAL PROPERTY SERVICE

N "1.507.582

P.y. n ° 95.355 International Classification:

N ° 91.874 B41 j

Improvements to the control circuits of printing machines. (Invention: Paul Reimann Adams and James Warren Whitesel.)

Company known as: INTERNATIONAL STANDARD ELECTRIC CORPORATION residing in the United States of America.

(Main patent issued on January 6, 1967.)

Requested on February 17, 1967, at 141 '16' ", in Paris.

Issued by decree of July 15, 1968.

(Official Bulletin of Industrial Property, No. 34 of August 23, 1968.)

(Patent application filed in the United States of America on February 18, 1966, under No. 528,904, in the names of Messrs. Paul Reimann Adams and James Warren Whitesel.)

The present invention relates to improvements to the control circuits of printing machines and, more particularly, to a device for controlling the right margin of a typed text using an automatically controlled typewriter.

As used herein, the term "automatically controlled typewriter" means that the machine is controlled by previously recorded data. For example, the data can be recorded on a perforated tape, and when the tape is fed into the typewriter, the typewriter reproduces on a sheet of paper text identical to the text recorded on the tape. Under these conditions, a typist has no other business than to put the tape in the typewriter and start a reading system, as long as the control signals recorded on the tape do not stop the machine. thus requiring human intervention.

It is sometimes desirable to be able to make line length corrections on the tape, so that the right margin can be adjusted so that it looks roughly clean as the copy is typed. Those skilled in the art will readily appreciate the many reasons why such line length corrections may be considered essential. However, it appears useful to list some of these reasons here, in order to better understand the subject of the invention. One is to correct the natural jagged state of the right margin so that this margin becomes a straight line; thus, the final copy no longer has the appearance of typed text, but that of printed text. Another reason is to allow the typist to make corrections to the original text quickly and easily. In this regard, the main patent provides improvements to automatic typewriters by allowing corrections to be made to an original typed text, for example by colla-ting an original tape with a correction tape. But if the collation results in the insertion or deletion of relatively long passages, the corrected line text recorded on the collation tape may, on the typewriter's sheet of paper, be several times the length. of a normal line or a fraction of that length, respectively.

The present invention relates only to cases where the text of the final copy of a machine-written message is recorded on an information medium, such as for example a perforated tape. The recorded data includes both a clear copy of the printed text and typewriter control signals in the form of perforations, magnetic recordings, or the like. A common form of such a tape is called a "partial punch tape", and is commonly used with teleprinters.

The invention does not relate directly to the specific formation of the band, nor to the exact nature of its end use. The formation of the strip as well as its possible use are the subject of a detailed description in the main patent.

The object of the present invention is to provide

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new and improved means of controlling the right margin of typed text on a sheet of paper.

One of the characteristics of the invention resides in a device for controlling the right margin of a typed copy on a sheet of paper by a typewriter controlled automatically by data recorded on a tape, said tape bearing at the both the text to be reproduced in clear and control signals of said machine, at least one of said signals serving to control the right margin on said sheet by commanding said machine to start a new line, said control device comprising the means of materialize on the conveyor mechanism of said strip a measured length corresponding to the distance required on said strip to record the control signals causing said machine to print on said sheet a line of desired length, means for comparing said measured length with the distance between 2 successive margin control signals and means of recording on said tape signals controlling to said machine to make the spacing modifications necessary to obtain a line having said desired length.

Another feature of the invention is that lower and upper tolerance limits for the length of the lines are materialized on the tape conveyor mechanism.

Another characteristic of the invention resides in the fact that the signals for controlling the spacing modifications are recorded manually on said tape at points where it is desired that said modifications be carried out by the typewriter, the recording of said signals being effected by marking means which simultaneously control the displacement of said strip relative to the marks materializing the length of the lines, said displacement being a function of the modification of spacing which will be made by said machine on reading the signal corresponding control command, so that said movement retains the memory of the effect of recording said signal.

Various other characteristics will emerge from the description which follows, given by way of non-limiting example, with reference to the appended figures which represent:

Figure 1, a diagram of a typewritten sheet of paper, illustrating cases requiring correcting the right margin;

Figure 2. a side view of a supporting and advancing mechanism of a data recording tape;

Figure 3, a top view of the mechanism of Figure 2, which shows a first embodiment of the invention;

FIGS. 4 and 5, top views similar to FIG. 3, but respectively showing a second and a third embodiment of the invention;

Figure 6, a cross section taken along line 6-6 of Figure 5;

Figure 7. a cross section taken on line 7-7 of Figure 5;

Figure 8, a perspective view of an automatically controlled typewriter;

Figures 9 and 10 are diagrams illustrating two alternative methods of reading the tape by the machine of Figure 8.

Referring to Figure 8, we will begin by recalling the operation of the automatic control typewriter described by the main patent. The typewriter 8 has two perforators 9 for making a first strip corresponding to an original copy and a second strip corresponding to the corrections to be made to the text recorded on the first strip. These two tapes are then collated to obtain a new tape recording the text of the first tape modified by the corrections recorded on the second tape. The new tape is preferably a partially perforated tape, carrying both a printed recording and a perforated recording prepared in a well known manner. This is the band shown in the other figures.

Figure 1 explains the problems that may arise with the right margin of a letter automatically typed from the new tape. Assume that the typist has decided that a line is within the acceptable tolerance limits of the right margin if that line ends between the dotted lines 11 and 12. Thus, the typed line 13 is too short because it does not reach the limit 11 of the margin, and line 14 is too long since it exceeds the acceptable limit 12 of the margin. The reason may be a typist's error, or it is possible that a word or two has been deleted from line 13 and a word or two has been added to line 14. If the decision is to justify the lines, each printed line will end on the same vertical limit 11 or 12 of the margin.

Reference 15 indicates a relatively long correction to the original text, which may have been made in the form of an insertion between the letters "S" and "0" on sheet 10. Reference 16 indicates another relatively long correction, which may have was made in the form of a deleted passage between the letters "T" and "V". If either of these corrections has been made, a number of line endings will have been distributed almost randomly across the sheet of paper. However, it is obvious that no end of line will be

offset by more than half of the acceptable length of a typed line; either it is shorter, or it is longer than an acceptable half line. Thus, as soon as a few lines have been lengthened, or shortened, by no more than half of a typed line length, the original carriage return symbols will be correctly placed again.

In the example of figure 1, the problems are, therefore, to lengthen line 13, to shorten line 14, to place in the page the insert 15 between the letters "S" and "0", and remove the canceled passage 16, while connecting the letters "T" and "V".

To solve these problems, the tape is marked with the necessary control signals to make these line length corrections and, also, any other correction.

For this purpose, the reel 20 unwinding the collation tape is mounted on a drive mechanism 21. The tape 22 is then caused to unwind from the reel 20, under a plate 23, and to wind up on a receiving reel. 21. The location of the belt drive mechanism 21 is irrelevant. This mechanism could be part of the typewriter, as is the case in Figure 8, or it could be part of a separate device. For the present description, it is assumed that it is an independent device.

As the tape 22 passes through the drive mechanism 21, it is covered by the plate 23 which may be made of a transparent material, or have a window so that the print on the tape can be read. directly by a person. A reticle 25 is placed on the plate 23, near one of its ends. A window 26 is adjacent to the other end of the plate 23. The distance between the reticle 25 and the window 26 is a measured length which corresponds to the acceptable length of a line of a sheet of machine paper. If the position of the web is such that the beginning of a printed line is below reticle 25, that printed line may end anywhere in window 26 and still be within tolerance (i.e. that is to say the dotted lines 11, 12 of FIG. 1) which gives a reasonably ordered right margin. A reticle 29 can be placed in window 26, if desired, to indicate one. right margin to which the end of lines can be justified. Reticle 25 or window 26 (if applicable), or both together, can be moved left or right, to match the margin position setting that the typist performed on the typewriter. Figure 2 shows the buttons 27, 28, which allow the adjustment of the positions of the reticle 25 and the window 26, respectively.

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Figure 2 also shows a row of keys 30, which may print different symbols on the strip 22. A series of different symbols are provided by these keys so that there is a separate symbol for each correction that can reasonably be envisaged. . These symbols could be binary coded digits printed on the tape; or, they could have specific characteristics of ultra violet, magnetic, colored inks, or many other characteristics. Preferably, these symbols are printed on the tape in a manner which avoids confusion with the message already printed. In the case of non-magnetic symbols, these are placed on the tape in order to be read optically; the optical reader is represented symbolically at 31. The exact nature of the symbol is irrelevant, as long as it can be read with the correct gain.

In the present case, the tape is moved left or right in the direction of arrows A or B, in order to bring the correction point under the reticle 33. Or, alternatively, the reticle 33 is moved. to the left or to the right in order to bring it to the correction point of the strip 22. Then, one of the keys 30 is pressed and a symbol is printed on the strip at the chosen point. The symbol could indicate the addition of a space or a half-space, the subtraction of a space or a half-space, or a carriage return with or without a hyphen. In this way, the printing line can be made longer or shorter.

The nature of the necessary equipment will emerge more clearly from the description of three embodiments of the invention, shown by way of example in FIGS. 3 to 7.

In the embodiment of FIG. 3, the plate 23 comprises two elements made of transparent material. Plate 23a covers web 22 for a distance necessary to store typewriter control signals, which correspond to the lower tolerance limit of the length of a print line typed on typed sheet of paper 10. The plate 23b covers the strip 22, after the distance has exceeded the upper limit of tolerance, or forbidden zone of the right margin. Thus, the edge 35 of the plate 23a represents the shortest admissible printing line and corresponds in figure 1 to line 11. The edge 36 of the plate 23b represents the longest admissible printing line and corresponds to line 12 of figure 1.

The button 27 allows the adjustment of the position of the reticle 25, in order to wedge the left margin with respect to the line 11, or lower tolerance limit of the right margin. The button 28 allows the adjustment of the edge 36 relative to the line 12 or upper limit of tolerance.

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To use this device of Figure 3, a typist observes a margin control sign (which may be a carriage return symbol 40), printed on strip 22. She then wedges this carriage return symbol under the reticle. 25.

The typist observes the tape in window 26. If she sees in window 26 another carriage return symbol 41, there is no problem with the right margin. Thus, Figure 3 has been drawn to show a typewritten print line having an acceptable length and ending at the lower limit] 1 of tolerance. On the other hand, if the carriage return symbol 41 occurs at the same place where the letter "A" appears in the word "NOW", then the print line ends at the upper limit 12 of tolerance.

If the typist does not see a carriage return symbol in window 26, she notes whether the closest symbol is to the left or right of the window. Depending on the distance where the nearest return symbol is, she may decide to lengthen or shorten the line below strip 23a; or, it may decide to interrupt the print line at a certain point which appears in window 26. It does so by marking on strip 22 a control signal. A scale 42 assists his decision by telling him how many spaces must be added or subtracted to reach the tolerance limits.

One can arbitrarily assume that she marks the tape with one of the different colored pencils or felt-tip markers. The colors it uses are assumed to have the following meaning:

Blue: return of the carriage without hyphen;

Red: carriage return after insertion of a hyphen;

Black ; carriage return (or other control signal) canceled;

Green: space added (or removed).

Other colors could be used to signify the addition (or subtraction) of a fraction of space.

During reading, when the tape 22 is used to drive a typewriter, the optical reader 31 detects the marks, according to their color, in a well known manner. For example, photoelectric cells could be used behind color filters. If the typist decides to add (or subtract) a few spaces, she simply spins take-up reel 24 and places a green line on strip 22, as it exits from under plate 23a. As an example, the line 43 in Fig. 3 could be a green mark thus placed on the strip 22. During printing, this mark 43 will cause the automatic typewriter to add a space between

"IS" and "THE". Similarly, other colors could be used to add or subtract, at any point on the strip, whole spaces, half-spaces, or other fractions of space. The typist simply reads the scale 42 and places the indicated number of marks of the exact color at the places on strip 22 where she wishes to make a change.

The typist may also decide to have a carriage return performed by marking a dot on the tape in window 26. A blue pencil is used if the carriage return is between words and a hyphen is not. necessary. The red pencil is used if the carriage return is between syllables and a hyphen is required. For example, if the carriage return symbol 41 does not appear in window 26, the typist places a blue pencil mark between "COUNTRY" and "NOW". Then, it monitors the strip which it brings out from under the plate 23a by rotating the reel 24. At the moment when a symbol of return of the carriage in the wrong place appears, it covers this symbol with a mark in black pencil. Subsequently, during reading, the typewriter detects the black mark and the carriage will not return despite the original carriage return symbol appearing on the tape. Instead, the carriage will return when the blue pencil mark, or red pencil mark, is read.

However, the typist places the new carriage return mark under crosshair 25 (a mark in blue or red pencil, as just said), and she observes whether a carriage return symbol appears in the window 26. If yes, there is no longer a problem with the margin correction; indeed, if a carriage return symbol appears in window 26, the carriage return symbols originally typed on tape 22 will achieve a correct right margin. If not, the typist repeats the above process until a symbol appears in the window. She will never have to make a correction greater than half a line, and thus will be able to lengthen or shorten the lines in order to incorporate a passage to be typed.

To lengthen the lines, she adds spaces and / or places the red or blue pencil marks as close as possible to the edge 36 of window 26. To shorten the lines, she subtracts spaces or places the red or blue mark as well. as close as possible to the left edge 35 of window 26. Normally, she will not have to adjust the length by more than four to five lines before seeing in window 26 a carriage return symbol. Subsequently, the right margin is obtained

automatically, according to the original keystroke.

There are no problems posed by varying the number of lines on a page. During printing, the typewriter will run until it has placed the desired number of lines on a page, at which point it will stop. The typist, or machine, then feeds a new sheet of paper into the typewriter and typing continues. Thus, a rectification having the effect of adding a certain number of lines may result in the striking of additional sheets. Conversely, canceling certain lines can lead to a lower number of sheets.

To justify the lines, the plate 23 can be arranged as shown in Figure 4. The strip 22 passes under two guides 44, 45, preferably with transparent edges, so that it can be marked while it is running. found under plate 23. Crosshairs 25 and 29 appear on a guide near the print on the web. In this case also, the typist moves the strip 22 in order to place under the reticle 25 a symbol 40 of return of the carriage. She looks into window 26 and observes where the next carriage return symbol is located relative to reticle 29 setting the desired right margin. In the example of Figure 4, she notices that the last letter that will be printed on the line is the letter "S". She then observes a scale 47 and she notes that the print line ends four graduations below the reticle 29. She therefore adds four intervals by placing marks in green pencil on the strip, as shown at 48, 49, And so on. While typing, the tape will instruct the automatic typewriter to enter additional space at each of these two locations 48, 49, and wherever else a green mark appears. This will bring the letter "S" flush with the right margin identified by crosshair 29.

If the typist, on reading the scale 47, finds that a carriage return is necessary, she uses a carriage return mark in red or blue pencil (depending on whether a hyphen is required or not) .

The embodiment of Figures 5 to 7 allows a more refined and automatic justification of the lines. This embodiment is capable of eliminating human error. For present purposes, the parts of Figure 5 which also appear in Figure 4 can be considered as similar to each other.

In addition, Figure 5 shows a slide assembly, or slider 50, which moves side to side on slides 44, 45, in the directions indicated by arrows A and B. As shown in the side view. end (fig. 7) of a preferred form of

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realization of this slider 50, the latter is mounted on wheels 53, 54, in order to roll on the slides 44, 45. The mechanisms controlled by the buttons 27, 28, are arranged under the slides 44, 45, so that the cursor 50 can be moved along the entire length of the latter.

The cursor 50 comprises a series of pushbuttons or keys (eg 56), a pair of reticles 57, 58, a device 60 for controlling the position of the web, and a marker device 61 (FIG. 6). In addition, the complete assembly comprises a pair of devices 62, 63 for limiting the movement of the strip, which are intended to apply to the latter a certain pressure to prevent any unwanted movement of this strip.

Key 56 (and other similar keys) controls tape marking. Taking into account the assumptions made in the above, these keys can be blue, red, black and green, in order to indicate the corresponding reading functions which they control. The reticles 57, 58 will identify the point of the strip 22 where a mark of one of the coded colors is printed at the moment when the associated key is pressed.

The device 60 for controlling the position of the strip comprises a toothed wheel 64 passing through a row of holes 65 made in the strip 22. Associated with the toothed wheel 64 is a mechanism intended to impart thereto a step-by-step rotary movement. , which is shown here as a pinion 66 and a pair of pawls 67, 68. When the pawl 67 is depressed, the pinion 66 and the toothed wheel 64 rotate one step in the direction 70 of the needles. of a watch. When the pawl 68 is depressed, the rotation is counter-clockwise 71. While the rotation is clockwise, the toothed wheel pulls the band 22 forward by an interval. in the direction 72. While the rotation is in the opposite direction, the toothed wheel 64 pulls the band 22 in the direction 73.

Spring 75 provides the return force of push button 56 to its normal position.

The devices 62, 63 apply a predetermined pressure on the strip 22, in order to maintain a sufficient tensile force to prevent the strip 22 from accidentally taking a sideways movement during its movement in either direction 72 , 73. However, the pressure applied at 62, 63 is insufficient to prevent the toothed wheel 64 from moving the web. The coils 20, 24 can also apply a slight driving force at any time, via a slip coupling or a resiliently acting drive belt, in order to

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to help the toothed wheel 64 as it moves the belt 22.

The marker device 61 is represented here as comprising a cylindrical reservoir 76, comprising at one of its ends a felt tip 77 and containing a volume of ink 78. The ink may be of one of the colors of the supposed code. above, or it may also be an ultra-violet ink. The reservoir 76 is mounted inside a support 80, and it is biased by a spring 81 in order to impart to the end of the felt tip 77 a marking pressure of a sufficient value. A projection 82 retains the reservoir to prevent it from escaping from the support 80; however, the adjustment is sufficiently free not to interfere with the pushing force exerted by the spring 81.

A suitable mechanical transmission 84 connects the marking assembly 61 to the associated push button 56. In the present case, the transmission is only shown in the form of a single push button. However, this transmission is such that the strip is marked and the felt tip 77 abruptly leaves contact with the strip before the toothed wheel 61 has been able to move the strip. Thus, each time the key 56 is depressed, the tip 77 presses on the strip 22 at the point indicated by the reticle 58.

The operation of the embodiment of Figures 5 to 7 will now be described. Key 56 is normally held in the up position by the pushing force exerted by spring 75. The typist moves the cursor 50 so that the reticle 58 is at the point on the web where a gap adjustment is to be made. Then, she chooses the push-button marked with the desired color and function. As an example, a blue button can be marked "CR" (carriage return without hyphen), and a red button can be marked "CR-" (carriage return with hyphen), given coding assumptions above. The felt tip 77 will therefore print on the strip 22 a carriage return symbol, when these buttons are pressed. Thereafter, the tip 77 abruptly withdraws and the web moves. If key 56 is a carriage return key, a set of contacts 86 may additionally be energized to cause spool 24 to rotate and feed the web until the new carriage return symbol , having just been printed on the tape by the point 77, comes to be placed under the optical reader 31 and under the reticle 25. This arrangement is particularly useful when the mechanism is part of the writing machine, as shown in the figure. 8.

If the push-button 56 is a green button controlling the addition of a space, it may be marked "-j- 1" or "-j- 1/2" to indicate that it is adding,

depending on the case, a whole space or a half-space. Or, it can be spotted by any other fractions, if necessary.

After the typist chooses the desired push button, she presses it against the pushing force of the spring 75. The marker 61 moves down and places a colored ink mark on the tape at the location. under the reticle 58. The pawl 67 descends on the pinion 66, which rotates in the direction 70. The toothed wheel 64 also rotates and the band 22 is then pulled in the direction of the arrow 72. The amount of displacement resulting from the band corresponds to the amount of spacing adjustment that will be made by the automatic typewriter during printing of the sheet copy. Thus, we notice that the movement of the tape keeps the memory of the effect of each correction as it is made.

The typist observes the print under the reticle 29 fixing the right margin. If the tape has not been pulled far enough, she moves cursor 50 until reticle 58 is at another desired point on tape 22. Then, she depresses another push button. Band 22 moves once more to retain memory of the gap adjustment effect. Again the typist looks under the reticle 29 to see if the end of the print line has been moved to the correct margin point. If necessary, it repeats the same process until the length of the line is correct.

Push button 88 may relate to another coded function and, for example, be colored orange. It can thus perform a function similar to that of the green button, except that it removes a space during printing and pushes the web in the direction of the arrow 73 by an equal distance, for example, to the space occupied by a third of character. The button 88 is therefore depressed to shorten a line at the moment when the reticle 57 is on a chosen point of the strip 22, where such a space can be cut off from the line. It is thus seen that the lines can be shortened as well as lengthened.

If the typist, looking under crosshair 29, finds that she has corrected too much, she can move cursor 50 to a previously marked point and depress the black button to cause the typewriter to ignore the previous command signal. This black mark will cover and cancel the previous mark.

A row can also be justified while the original copy is still in the machine. This justification is done in any of the ways described above with respect to Figures 3-7. The strip 22 (Fig. 8) moves transversely across the front of the typewriter, slightly behind the keyboard 90. , as described in the main patent. This band position fa

cilitates the visual comparison between the original copy printed on sheet of paper 91 and the information written on the tape.

As it travels across keyboard 90, strip 22 is covered by a plate 23 which has reticle 25 near one end and window 26 near its other end. Again, if the position of the stripe is such that the start of a line from the left margin is below the reticle 25, the printed line may end anywhere in the window 26 and still have a reasonably sharp right margin; or, it can be justified by ending on the reticle 29. To facilitate this operation, an additional set of contacts is mounted on the return key of the carriage. Each time the carriage return key is pressed, its contacts close a circuit integral with the belt drive mechanism. The web is then driven automatically until the detector 31, associated with the reticle 25, delivers an exit symbol to stop the web driving. The carriage return symbol is then placed at a point which corresponds to the desired left margin, as shown in Figures 3 to 5. In this way, the position of the left margin of the web is automatically set. The typist therefore only needs to read the apparent right margin and make the appropriate corrections with the colored pencils, or cursor 50, following the processes described above.

As noted above, detector 31 may be any device capable of acting in response to marks manually inserted on the tape. Of course, it is possible that a hole punch reader 92 is placed on the side of one side of the tape, and the detector 31 of the hand-inserted marks is placed on the side of the other side, as shown by FIG. 9. The function of the reader 92 is to read the perforations of the strip (of the equivalent symbols), and to control the automatic typewriter so that it types the corresponding character each time. The function of the reader 31 is to respond to the marks inserted manually, by deleting or modifying the symbols read at 92 and used to control the machine.

It is very likely, however, that the hole punch reader will interfere with the simultaneous reading of manually inserted marks. The embodiment of FIG. 10 is made to eliminate this defect. In this embodiment, the position of the perforation reader is for example that indicated at 95 and the manual mark reader is shifted at 96 so that the two readers do not simultaneously read the same control signals from the ma7 - [91.874 /1.507.582]

China. The reader located at 96 must be in a place where it reads the manually inserted marks before the corresponding marks can be read by the punch reader located at 95. The exact distance between the positions 95, 96 occupied by the two readers does not is not of significant importance, but it is obvious that there will be a clearly defined number of intervals between the two readers. For the remainder of this description, it will be assumed that there are five intervals.

Means are provided for controlling the typewriter so that it performs the operations represented by said marks at the moment when the corresponding mark passes through the perforation reader. In other words, since there are five intervals between the positions 95, 96, of the two readers, the reading equipment comprises a number of five-position shift registers 97, one of these shift registers being provided for each of the four colors, hand-inserted marks which have been assumed to be used in the present description. It goes without saying that if more than four colors were used, a larger number of shift registers should be provided in the ratio of 1 to 1.

However, if a blue mark, for example, is detected by the reader at 96, a signal is recorded in the first stage 98 of the shift register 97. Each time the tape 22 moves one gap, the signal advance of one stage in the shift register. As the signal reaches stage 99, the typewriter performs the operation commanded by the manually inserted blue mark. Likewise, red, black, green, or any other colored marks would be introduced into the shift register provided for each of the colors and, after advancing the tape corresponding to five intervals, the typewriter would perform the function commanded by the mark of the color read.

The invention has been described in the foregoing in a manner which will allow an easy understanding of its principles. However, it goes without saying that these principles have many other applications than those described here. For example, the "green" key could actually be a family of keys for adding any desired number of different line length corrections. Furthermore, the tape could be kept in a stationary position, the reticle 29, as well as the scale 47, then moving in order to keep the memory of the corrections as they are made. The colored ink marks could compose any convenient code and be, for example, symbols commonly used on bank checks. Finally, many other applications will be obvious to those skilled in the art.

It is obvious that the above description

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has been given only by way of non-limiting example and that numerous variants can be envisaged without thereby departing from the scope of the invention.

ABSTRACT

The invention relates to a device for controlling the right margin of a typed text by an automatically controlled machine. The machine operates by controlling signals recorded on tape, at least one of which causes the carriage to return. Means for comparing a length measured on the belt advancement mechanism with the distance between two successive carriage return signals make it possible to verify whether a line will have a correct length. Otherwise, markings made manually on the web control the machine so as to justify the line.

Company known as:

INTERNATIONAL STANDARD ELECTRIC CORPORATION

Vicarious :

Y. Gohpil

For sale of booklets, contact the Imprimerie Nationale, 27. rue de la Convention, Paris (15th).