DE1512253A1 - Copy and reproduction device - Google Patents

Description

KAI CIN IAINWALI C

DIPL.-ING. GÜNTHER KOCH DR. TINO HAI BACH

β Munich 2 - March 6, 1967

OUR MARK: 10 711

INSIITFTB POR SCIENTIFIC INFORMATION Philadelphia, Pennsylvania, V.St.v.A.

Copy and reproduction oil device

The invention relates to copier and reproduction devices. More specifically, the invention relates to a device for copying or reproducing printed or written information in the form of words, sentences, Characters or the like. Such a device is suitable for reading entire manuscript pages or selected words, parts of sentences, Reproduce sentences or short paragraphs. In addition, the dimensions of the device should be so small that the device j ([ tion can be transported with the üand in order to be able to be used whenever there are problems or the like should be copied.

In many cases it is desirable to use printed material to copy or reproduce from books or the like «This applies in particular to members of Beruten, e.g. for engineers, lawyers and statisticians who do research in Books, files and other documents and have to copy certain information from these documents.

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Copying with the ß-and proves to be laborious and time-consuming in particular when extensive documents have to be copied. While there are currently numerous types of photocopying machines available, such machines are relatively large in size. Therefore, it is necessary to bring the documents to be copied to the photocopying machine. In addition, such machines copy an entire page at a time, so that there is a waste of material if only small parts of a page need to be copied, as is often the case in practice Can copy loose sheets, but not bound pages of a book or the like.

In order to avoid these disadvantages, we have already and developed healing devices, e.g. U.S. Patents 3,052,755 and 3,064,078. at With these devices, the user must move the reading unit in a horizontal position Move direction from left to right across each word or phrase to be copied. The performance This process is similar to the effect that is achieved, for example, in cartoons, when words are placed on a pad or the like are "painted", however, in these known devices no measures are taken to reduce the operating speed of the copier unit to the operating speed of the reading unit to vote. As a result, it occurs with these devices suggest that letters or words are squeezed or pulled apart in a sideways direction.

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In the U.fc> .A. patent application 301 293 of August 12, 1963, a device is described in which these difficulties and disadvantages, among other disadvantages, are avoided. The present invention now provides further improvements in such an apparatus.

It is thus a general object of the invention to provide a novel and improved copier and reproduction apparatus to create, the invention also provides a copy and Reproduction device before, in which either a so-^ j called fiber optics or a plastic lens system for imaging is used. Furthermore, the invention provides a novel and improved copying and reproduction device, in which an imaging system is used which produces only one line or line as an output signal. Another one The aim of the invention is to provide a novel and improved copier and reproduction device which makes it possible to from printed documents either paragraphs, images or individual sentences to .Kopieren, the invention also provides a novel and improved copier and reproduction device ' in which the action of the reading head is synchronized with that of the recording means. the invention also provides a novel and improved reproducing and copying apparatus before, in which the recording means produce a recording only when they are syncnron with a scanning head movedo Finally, the invention provides a novel one and improved copying and reproduction devices that Includes means to ensure that this is the drawing

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absorbing material proportional to the movement of the reading head before a record is made on the material.

Further details and advantages of the invention emerge from the following description of an exemplary embodiment at xiand of the drawings.

fig. 1 shows schematically, partly in perspective and partly in section, a device according to the invention.

Yy'ig. 2 illustrates that in the device according to the invention used electrical circuit in a block diagram.

3 is a perspective partial illustration of a drum forming part of the device.

In the figures, similar parts are each with the same Reference numerals denoted; in ü'ig. 1 you can see a total designated 10 copier and reproduction device according to the invention.

Generally speaking, the apparatus comprises a scanning or reading head 12 and a separate production device 14.

The reading head 12 comprises a housing 16 with an opening 18ο The dimensions of this read head are so small that the user in which ^ and can be used. If necessary, at The U-housing 16 can be attached to a U-housing (not shown here). A mask 20 is built into the housing 16 near the opening 18. The Masice 20 delimits the opening through which

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the material to be copied from inside the housing 16 is "visible". Usually the opening is 18 above the too Copying material arranged so that the read head 12 the Can scan material

A lens 22, which can consist of glass or a plastic, is arranged near the mask 20. The lens 22 transmits light to a photosensitive strip 30 and creates a sharp image of the material to be copied on the surface of the strip. M.

The photocell strip 30 is a Aggregate through which an optical image falling on its surface is divided and converted into electronic signals. The output for each image segment is proportional to Light intensity of the segment in question. The strip 30 consists of a substrate made of silicon on which a straight Unit is applied from switching diodes. Each switching diode is with the pad at a different point of the same tied together; so that the base practically acts as a load network having a resistance which each switching diode is biased in the opposite direction at a slightly different level. Above the changeover diodes is a straight aggregate of photodiodes in a 1: 1 correspondence arranged, which are connected to a common line. The construction and characteristics of such Malbleiteraggregats under the legally protected designation bcanistor are available from Horton and others such has been described in the Proceedings of the IEEE

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Aggregates. Can be purchased from the Semiconductor Division of the i'airchild Camera and Instrument Company, Inc., Palo Alto, California, U.D.α. be drawn.

The application of a ramp or staircase voltage to the load resistor unit has the effect that the diodes are switched over one after the other when the external bias voltage applied to the diode in question is overcome. If a switching diode is switched so that it becomes conductive in the forward direction, a current flows whose strength is proportional to the intensity of the light falling on the photodiode which is connected to the switched diode _o With the help of a suitable circuit, a linear image is created (parallel sources in ϊ'οπη of light and dark surfaces) transformed into a train of temporally successive electrical impulses, which can be transmitted to any other point with the help of known means. The required for this ramp or staircase voltage is generated by a generator 34 which can be housed in the housing 16 when it is formed with sufficiently small dimensions} might otherwise the ^'iL eproduktionseinrichtung be arranged "enerator in the housing 14, ■'-'er sampling generator is formed by a circuit of known type which serves to generate an almost right-angled triangular wave, in which the ramp is formed by the hypotenosis of the triangle, or a wave whose shape resembles that of a staircase a scanning signal of one or the other type just mentioned leads to a considerable simplification of the device, since it is not necessary here to provide a thick cable with a large number of wires

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contains one of which is assigned to each photocell j
rather, the resulting signal can be transmitted using a single wire.

G-as mentioned at the beginning. US patent application, the cable 32 consisted of two wire lines, by means of
whose electrical energy was supplied to the lamps for illuminating the material to be copied, and also contained
According to the present invention, however, the photocells are scanned one after the other with the aid of the ramp voltage, so that only one wire line in addition to another line common to the signal lines is required for the image signal. In addition to the image signal line, the cable 32 now includes a line for the ramp signal, a line for the lighting energy, a line for the read head synchronization signal taken from the photocell O2 and a common reference line for all signals, ie a total of five
Wire lines

The output line of the pnoto amplifier 35 is connected by a line 36 to a contact brush 38, which is mounted in a self-supporting manner so that its free ± inde on the hub 42
of the printing assembly 40 slides. The printing assembly 40 comprises a printing wheel 44 which is connected to the hub 42 by spokes 46
which are electrically conductively connected to the hub 42, extend from the hub radially to the had and are only mechanically connected to the wheel 44.

The wheel 44 encloses a cylindrical component made of a

electrically non-conductive material, e.g. made of plastic or

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'an ij'asermaterial. The circumferential distances between the ends of the spokes 46 extending through the wheel body are equal to the width of the strip 50 of an electrostatic or electro-sensitive material or something like: s less than this üreixe. This means that at any given moment only one Spoke 46 touches strip 50.

The hub 42 is mounted so that it can rotate about an axis which is parallel to the longitudinal axis of the strip 50; A motor shaft 52, which is connected to a motor 54, which is driven by the unit 56, serves to drive the hub is supported, by means of which an electrostatic treatment of the paper can be effected. In the preferred form of training the motor 54 drives the wheel 44 at a high peripheral speed compared to the running speed of the strip 50 at. for example, the strip 50 can be with move at a speed of about 125 mm / sec, while the peripheral speed of the wheel 44 is about 9500 mm / sec.

, The strip 50 of the recording material is from withdrawn from a supply roll 58 and passed over a support plate 60 so that it moves under the wheel 44 therethrough. the Backing plate 60 may be made of a conductive material and may be grounded to establish an electrical circuit between the Sampling or ramp generator 34, the line 36, the contact brush 38, the hub 42, the spokes 46 and the electro-sensitive Close strip 50.

The sample or xtamp generator 34 is triggered to to be put into action and to effect a scan,

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as soon as one of the spokes 46 begins to paint over the strip 50. Here, an electrostatic charge is applied to the strip 50 in a 1i1 relationship to the scanning signal, which is taken from the photocell unit with the aid of the ramp generator 34. In addition, the stripe becomes continuous transported at a speed which is directly proportional to the movement of the reading head 12 to it the To enable wheel 44 to be scanned with the aid of the reading head 12 To transfer information on the strip 50.

So that the strip 50 can be pulled off the supply roll 58 and guided over the support plate 60, there is a drive roll 62 is provided, which cooperates with a pressure roller 64. The drive roller 62 is driven by a stepping motor 66 powered. With the help of the drive roller 62, the strip 50 is through the unit 56 for the electrostatic Treatment of the paper drawn. The wheel 44 rests lightly on the strip 50, which is preferably an electrostatic one Paper, as it is e.g. from the company A.B. Dick can be obtained when a voltage signal is applied to the spokes 46 is applied from the photo signal amplifier 35, a marking is produced on the strip 50, which is also called latent Image could denote. The assembly 56 develops this latent image so that it becomes visible to the naked eye.

Furthermore, the copying or reproducing apparatus 10 comprises one in Jj ¹ Ig. 2 schematically illustrated circuit for synchronizing the movement of the strip 50 with the movement of the reading head 12.

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The reading head 12 comprises a synchronization drum 68 which is rotatably mounted on one side of the housing 16 IPig. 3, the drum 68 comprises a cylindrical body 70 transparent material, e.g. glass or a clear plastic. The cylindrical one. Body 70 also carries one transparent photographic emulsion 72. The emulsion layer 72 is designed to have a number of black or opaque lines 74, respectively. Thus, the emulsion layer shows 72 the image of a cylindrical surface on which transparent and opaque lines or stripes are connected alternate. The center-to-center distance between the opaque lines can be about 0.125 mm, while the distance between adjacent opaque lines, i.e. the width of each transparent line, can be about 0.025 mm * The Methods for making such photographic emulsions are known and have been in use for several years The field of photographic and microcircuits.

The drum head 68 is preferably on the housing 16 stored so that its peripheral surface with the lower end of the Housing is aligned or protrudes a little downwards. Will the end of the housing 16 near the one to be copied Material is placed and the housing 16 is moved along the material, the drum 68 rotates. The diameter of the drum is preferably 1 / vT, which means that the extent of the Drum is a whole multiple of 1. As a result, the linear speed of the read head as it moves compared to the material to be copied transferred directly to the drum, and it is equal to the peripheral speed of the Drum 68.

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A light source 76 is arranged in the drum. When the drum 68 is rotated, it chops the light beam passing through the drum, so that light pulses are fed to the photocell 82 arranged in the immediate vicinity of the drum when the drum 68 is rotated as a result of a movement of the housing 16. The speed of movement of the drum is directly proportional to the number of lines 74 moving through the light beam from light source 76. The photocell 82 is thus supplied with light pulses at a speed which is directly proportional to the speed of the translational movement μ of the housing 16. If the drum is of the above dimensions, the photocell will receive 200 pulses every time the drum moves 1 inch (25 »4 mm).

The photocell b2 converts the light pulses into electrical pulses, which are fed to a signal processing stage 86 will. The stage 8b can be a device of a known type, by means of which the .signal of the photocell 82 is amplified and then converted into a signal that is sent to the j Use in the remaining parts of the circuit is suitable. Thus, stage 86 can either be a pike-corner pulse or a deliver a needle-shaped impulse, which depends on the construction of each of the 'J' parts of the circuit. Hereinafter the pulse treated in this way becomes a read head synchronization pulse designated.

This syncnronization pulse is supplied from the processing stage 86 from an upward and downward bit counter 88. The counter 88 can be one of several

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'are known meter constructions that make it possible to use the To count bits or pulses which are drawn \ via an input and to subtract those bits or pulses which be fed via a further input. The upward and down bit counter 88 provides an output signal for so long it registers an integer other than zero. If the count is zero, the counter 88 does not emit a signal.

At the output of the bit counter 88 is a logic threshold circuit 90 connected. Threshold circuit 90 may

P are composed of one or more circuit units, as they are known in the field of digital computers, and which continuously provide a pulsating output signal as long as that Counting result of the bit counter 88 deviates from zero. The stepper motor 66 is connected to the output of the logical threshold circuit 90 and works according to the pulsating Output signal of this circuit. The stepping motor rotates with each pulse that is taken from the threshold circuit 90 66 the drive roller 62 by a predetermined amount. This amount is in turn converted into a linear movement of the

™ strip 50 and a corresponding rotational movement of the pressure roller 64 implemented when the device is working properly is the number of the motor 66 through the threshold logic circuit supplied pulses equal to the number of bits counted by the counter 88, which in turn is equal to the number of the Photocell 82 is supplied pulses. If the read head 12 Moved along a distance of 1 inch (25.4 mm), the drum of the read head thus generates 200 pulses, the bit counter 88 counts these pulses, and the threshold logic circuit 90 leads

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the impulses to the motor 66. As a result, the drive roller 62 rotated by 200 predetermined whole steps. One can the amount by which the roller 62 ″ for each movement step of the Motor 66 is rotated, and thus also adjust the distance of movement of the strip 50 so that it is equal to that of the read head 12 traveled distance or greater or less than this distance. For this purpose, the angle of rotation is set, around which the motor 66 rotates for each pulse applied to it.

According to i'ig. 1 ″, the pressure roller 64 is located below a of the drive roller 62, and it rests against the strip 50. With this arrangement, the pressure roller is only rotated when the strip 50 is transported by the drive roller 62 in the forward direction, the motor 66 opens does not start, or if the roller 62 slips on the strip 50, the pressure roller 64 does not move.

According to the invention, on the axis of the pressure roller 64 a drum 92 arranged similar to drum 68, and drum 92. rotates together with roller 64 and serves to j synchronize the paper feed. The diameter of the synchronization drum 92 and the number of per unit length Its circumference provided lines are chosen so that the drum moves on by one line when the motor 66 a step pulse is supplied. If a pulse is applied to the motor 66, the drive roller 62 rotates the required -Amount rotates, the strip 50 will also be adjusted accordingly transported so that the pinch roller 64 is rotated here the drum 92 rotates a sufficient amount so that the photocell 98, which is associated with the drum 92, a light

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pulse is supplied. The one in the immediate vicinity of the drum arranged photocell 98 is assigned a light source 94 inside the drum 92. It can thus be seen that the drum 92 in connection with the light source 94 und.the photocell 98 Output pulses corresponding to the transport movement of the strip 50 generated.

These pulses are converted into electrical pulses by the photocell 98 and a further oil signal processing stage y9 and from there also the up and down bit counter 68 supplied. The correspondingly processed electrical pulses of the photocell 98 are the bit counter 88 so supplied that their number is subtracted from the counting result, which by the incoming read head synchronization pulses is produced. If the motor 66 responds properly to transport the strip 50 along the required distance, the tape feeder synchronization drum generates feedback pulses, the number of which is equal to the number of read head synchronization pulses. Induce these feedback pulses the bit counter 88 to gradually return to the count zero so that the logic threshold circuit 90 and the Motor 66 can be switched off. However, if the drive means comprising the motor 66 and the pulley 62 do not respond, generated the tape feed synchronization drum does not have a sufficient number of pulses to reset the bit counter 88 to zero. Hence the bit counter continues to output pulses which cause the threshold logic circuit 90 to To deliver pulses to drive the motor 66. These pulses are fed to the motor 66 until the

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fen 50 has been moved by the required amount and the The tape feed synchronization drum has generated pulses, whose number is sufficient to reset the bit counter 88 to zero. This ensures that the movement of the strip 50 is synchronized with the movement of the reading head 12 will ·

Referring to FIG. 2, the occurrence of head-liese Syncnronisationsimpulses indicating a movement of the read head, memory circuit J'lip-flop 110 is stored in a, and a corresponding signal is fed to a Singang a logic circuit 112 HAND--%. Similarly, pulses generated by the photocell 98 indicating that the paper transport drum 92 has advanced one step are stored in a flip-flop memory circuit 114 to which the other input of the IiAITD circuit 112 is connected. The electronic circuit 112 is designed so that its output voltage goes back to the logic value 0 when two specific signals appear at its input terminals, both of which correspond to a logic 1. Thus, the NAND circuit ^ 112 does not supply an output voltage or it supplies a logic 0 if information has been supplied to it which indicates the fact that the synchronization pulses of both the read head drum and the strip feed drum have moved one step back. The output signal of circuit 112 is fed to a NOR circuit 116. A NOfi circuit is a logic circuit that emits an output voltage when neither a 0 signal nor a D signal is fed to its inputs. If either one input signal occurs or both input signals occur, which one

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corresponds to logic 1, no voltage appears at the output of the NOR circuit; this corresponds to a logical 0.

A light source 118 is arranged together with a lens 120 in such a way that a light beam falls through the gaps between the spokes 46 of the wheel 44. The lens 120 is used to focus the light on a photocell 122. As the wheel 44 rotates, the spokes 46 interrupt the light beam from the light source 118 so that the photocell 122 produces a pulsating output signal. This pulsating output signal is amplified by an amplifier 124 and fed to the second input of the UOR circuit 116. The light source 118 and the photocell 122 are aligned such that a spoke 46 interrupts the light beam whenever one of the spokes is adjacent to the edge of the strip 50. If no voltage appears at the output of amplifier 124, and if at the same time no voltage also appears at the output of NAND circuit 112, which indicates that both a read head synchronization pulse and a tape feed drum pulse have occurred, triggering is effected or The start of a sampling ramp is initiated in the sampling generator 34 as soon as the output voltage of the NOR circuit 116 rises. When the spoke 46 in question reaches the correct position at which the production of a recording is started, the scanning of a vertical line of information in the read head is triggered, provided that the empty head has moved to a new position after a previous scan, and that the strip feed drum has also assumed _{a new (} position. In this way, a new

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Recording or so-called overwriting of old information prevented, and the operations for reading and recording are synchronized.

Since the NAND circuit 112 and the NOR circuit 116 are known logic circuits, a more detailed explanation should be superfluous.

When the copying and reproducing device 10 according to the invention is to be used, the user places the reading head 12 on the printed material to be copied. Here% who needs .Benutzer only through an opening in the housing to look to see which part of the pad is copied. When the read head 12 is moved along a printed page, the synchronization drum 68 rotates so that the stepper motor 66 is caused to rotate the drive roller 62 so that the strip 50 is drawn under the rotating wheel 44. The had 44 performs the printing process in the manner previously described.

. It should be noted that in the above-described j Embodiment can provide various changes and modifications without the scope of the invention leaving·

Claim;

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Claims (1)

151225? -If- PATENT CLAIM Copy and. Reproduction device, comprising a Scanning head with an outer housing that is provided with a scanning opening is versenen, in the underground housing arranged means for feeling of light falling through the opening and generating to ^ electrical signals proportional to light, recording media for receiving the signals and for recording a pattern which corresponds to the pattern which is passed through the opening passing licnt is formed, the recording means a recording head and an electrosensitive strip, and drive means for driving the strip on the Moving recording head past characterized by means (68,62) for sensing movement of the scanning head (12), said means comprising a light source (76), furthermore a landler suitable for milling light W (82), through which the light supplied by the light source is converted into electrical signals, and a movable interrupter (68) between the light source and the channel, the interrupter serving to make the light beam falling on the transducer proportional to the movement of the scanning head to interrupt, as well as by synchronization means (88 to 124) »to control the drive means in accordance with the signals emitted by the transducer. 909838 / CH5Q