JPH0225183B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying machine capable of copying only a portion of a document.

If you want to copy only part of the original using a copying machine, place a white paper over the unnecessary parts of the original, place the original and the cover paper on the original table, and make a copy. is normally done.
Alternatively, you can make a single copy of the entire original, then cut out only the necessary parts from that copy, place the cut copy as the original on the platen of a copying machine, make a copy, and use this second copy as the desired copy. It is also common practice to use

Also, only parts of multiple manuscripts can be added together to create one.
You may want to obtain a copy. In such a case, first copy each document one by one, cut out only the necessary parts of the copies, paste them together at an appropriate position, or place them at an appropriate position on the document table and make copies again. You will get a copy of

All of these involve tedious manual work, so
It would be extremely convenient if a machine could do it automatically.

The present invention was made in view of such demands, and
The purpose is to provide a copying machine that can automatically select only a portion of a document and make a copy by simply operating a button on an operation panel, without requiring manual labor as in the past.

In this specification, copying only a portion of a document in this manner will be referred to as a partial copy.

FIGS. 1 and 2 are schematic diagrams of a mechanical section of an embodiment of the present invention, with FIG. 1 showing an imaging section and FIG. 2 showing a recording section. An example will be explained in which the imaging section has one row of photoelectric conversion elements and the recording section has one recording head. In FIG. 1, a document 101 on a document support stand (for example, a transparent glass plate) 102 is illuminated by a light source 103.
(for example, a fluorescent lamp), and the reflected light reaches the photoelectric conversion element 105 (for example, a CCD (= charge coupled device)) via the reflecting mirrors 110, 111 and the lens 104, and generates an electrical signal corresponding to the original 101. converted into an image signal. The image signal is applied to recording head 2 in FIG. 2 to form a magnetic latent image on recording drum 1. The main scanning direction when forming a latent image is the direction perpendicular to the plane of the paper in FIG. 1 for the imaging section, and the rotational direction of the recording drum 1 in FIG. 2 for the recording section. FIG. 5b shows the main scanning direction and the sub-scanning direction of the document 101. When the recording drum 1 rotates once, main scanning is performed once. When imaging and latent image formation for one line are completed, or during imaging and latent image formation, both the imaging section and the recording section perform sub-scanning for one line. The sub-scanning is performed by moving the imaging sub-scanning table 120 in the direction indicated by an arrow 131 in FIG. In Fig. 2, a recording sub-scanning stage 2 on which a recording head 2 is mounted is shown.
This is done by moving 0 perpendicular to the plane of the paper. FIG. 3 more clearly shows the state of sub-scanning of the recording section, which includes the recording sub-scanning drive source 16 (for example, a pulse motor), the pulleys 12, 13, 14, and the wire 15.
By moving the recording sub-scanning table 20 in the direction of arrow 19, sub-scanning is performed.

In FIG. 1, an imaging sub-scanning table 120 includes a light source 103, reflecting mirrors 110, 111, a lens 104, and a photoelectric conversion element 105, and is moved by an imaging sub-scanning drive source 125 (for example, a pulse motor), pulleys 128, 129, and a wire 130. .

When the entire surface of the original 101 is scanned by repeating main scanning and sub-scanning in this manner, a magnetic latent image corresponding to the original 101 is formed on the recording drum 1.
Next, the magnetic latent image on the recording drum 1 is developed with toner by the developing device 3 shown in FIG. On the other hand, the recording paper 41 placed on the paper feed tray 5 is fed by the paper feed roller 4 and moves along a path shown by a broken line 44 on the conveyance guide 42 to reach the transfer roller 6. The toner on the recording drum 1 is transferred to the recording paper 41 by the action of the transfer roller 6, and the recording paper 41 passes over the conveyance guide 43 and reaches the fixing devices 7, 71. The toner is fixed on the recording paper 41 by the fixing devices 7 and 71, and the recording paper 41 is discharged to the paper discharge tray 51. The remaining toner after the transfer is removed by the blade 8 and the suction device 81. When development, transfer, fixing, and cleaning are repeated, a large number of identical copies are obtained.
When forming a latent image on the next document, the erasing head 9 operates to erase the previous latent image.

In FIG. 1, the clock pulse train generated from the clock generator 108 is applied to the CCD 105 via the CCD control circuit 107, and the output signal of the CCD 105 is taken out as an image signal via the video amplifier 106, and the recording head shown in FIG. The recording head 2 included in the recording sub-scanning table 20 is driven via the control circuit 24. Clock generator 108 includes a rotary encoder 25 connected directly to the shaft of recording drum 1 in FIG. 3 via a suitable coupling 21. The rotary encoder 25 generates one index pulse per revolution of the recording drum 1 and a number of clock pulses during the index interval. The index pulse and clock pulse accurately represent the circumferential position on the recording drum 1.

Details of this type of device can be found in, for example, Japanese Patent Application No. 53-121805.
No. (Japanese Unexamined Patent Publication No. 55-48779).

Figure 4 shows the appearance of this device.
Box 1 contains the mechanism of the recording unit shown in Figures 2 and 3, box 902 contains the mechanism of the imaging unit shown in Fig. 1, and box 903 contains the control unit. are accommodated in each.

Fig. 5 shows a comparison between the original and the copy when making a partial copy, Fig. 6 is a block diagram of the control section mainly involved when making a partial copy, and Fig. 7 shows a comparison between the original and the copy when making a partial copy. It is a flowchart showing the function of a control unit, etc.

In FIG. 4, there is an imaging scale 1 on the side of the document table 102.
51 is provided. The imaging scale 151 is the original 10
The size of 1 is divided into, for example, 10 equal parts in the sub-scanning direction, with scales of 1, 2, . . . 9. When the operator places the original 101 on the original table 102,
The portion to be copied is compared with this scale 151. When you want to copy the shaded area 171 in Figure 5b, that area is at scale 1 in Figure 5a.
If you compare it with 51, it becomes a number between 2 and 5.

The operator places the original 101 on the original table 102 and presses the partial copy button 158 on the operation panel 156 (FIG. 7, 402). Then, in Fig. 6, processing device 3
00 recognizes that the partial copy key 158 has been pressed, and selects the light emitting diodes so as to form the characters "PO-O" on the numeric display device 159 and causes them to emit light (403 in FIG. 7). (P. is PARTIML
(means COPY) Next, the operator inputs the number ``2'' at the starting point of the portion to be copied by pressing the number ``2'' button on the numeric keypad 160 (the 7th
Figure 404). The processing device 300 recognizes that the numerical value "2" has been input from the numeric keypad 160, and sets this numerical value in the register C301 (see FIG. 7, 40).
5). Further, this “2” is displayed on the number display device 159. At this time, the numeric display device 159 displays “PO
-2” (FIG. 7 406). Next, the operator inputs the number "5" at the end of the portion to be copied by pressing the number "5" button on the numeric keypad 160 (407 in FIG. 7). Then, the processing device 300
is the previous number "2" stored in register C301
is transferred to register B302, and the end point value "5" is set in register C301 (see 408, 408 in FIG. 7).
409). In addition, the numeric display device 159 displays “P.2-
5" (FIG. 7 410).

Next, the operator presses the start key 157 on the operation panel 156 (411 in FIG. 7). Processing device 3
00 recognizes that the start key 157 has been pressed and starts controlling the mechanism shown in FIGS. 1 and 2. First, the processing device 300 turns on the fluorescent lamp 103, drives the recording drum motor 28, and drives the belt 281.
The recording drum 1 is rotated clockwise via the .
Next, the erasing head 9 is driven to erase the previous latent image on the recording drum 1 (see 412, 413, 4 in FIG. 7).
14).

A counter B304 connected to the processing device 300 in FIG. 6 counts the number of lines in the sub-scan. First, counter B304 and register B302 are connected to comparator A30.
5 (FIG. 7 416). At first, counter B=0 and register B=2, so counter B≧register B? becomes NO, and imaging sub-scanning is performed (417 in FIG. 7). Processing device 3
00 causes the imaging sub-scanning motor 125 to move at high speed (to save time). When the imaging sub-scanning table 120 moves and comes to the sub-scanning position detector 211, the light emitted from the light emitting diode 211A is reflected on the imaging sub-scanning table 120, as shown by the broken line 210 in FIG. 1 and FIG. The phototransistor 211B receives the light, and this signal enters the processing device 300, and the imaging sub-scanning table 1 is placed at the "1" mark on the imaging scale 151.
It is recognized that 20 has arrived (418 in FIG. 7).
Then, via the processing device 300, the counter B304
1 is counted (419 in FIG. 7). Here, counter B304 and register B302 are again compared by comparator A305 (FIG. 7, 416). Counter B304 is 1 and register B302 is 2
Therefore, the high-speed imaging sub-scanning continues further (417 in FIG. 7), and the imaging sub-scanning table 120 eventually moves to a point where the output of the sub-scanning position detector 212 changes. Here, the change in the output of the sub-scanning position detector 212 is recognized by the processing device 300, and the count value of the counter B304 becomes 2 (Fig.
8,419). Here, since the value of counter B304 and the value of register B302 are the same 2, comparator A
305 changes, and the processing device 300 recognizes that the imaging sub-scanning platform 120 has come to the starting point of partial copying (FIG. 7, 416). Imaging and latent image recording starts from here. Recording head access mechanism 22
The recording head 2 approaches the recording drum 1. The image signal of the original read from the CCD 105 is sent to the video amplifier 106 and the recording head control circuit 24.
The magnetic latent image is applied to the recording head 2 through the recording drum 1, and a magnetic latent image is formed on the recording drum 1 (FIG. 7, 420, 42).
1). The imaging sub-scanning motor 125 and the recording sub-scanning motor 16 rotate at normal speeds, and perform sub-scanning of one line, for example, 0.1 mm per rotation of the recording drum 1 (sub-scanning line density is 10 lines/mm). 7 figure 422).
Each time the imaging sub-scanning table 120 moves and passes one of the sub-scanning position detectors 211 to 220, the counter 304 counts one by one as described above (FIG. 7, 4).
23,424). Eventually, when the sub-scanning position detector 215 corresponding to the scale "5" of the imaging scale 151 is activated and the count value of the counter B304 becomes "5", the comparator B306 that compares the register C301 and the counter B304 is activated. , processing device 30
0 recognizes that it has reached the end point of the partial copy (425 in FIG. 7). Then, the processing device 300 stops the recording drum motor 28, turns off the fluorescent lamp 103, and performs sub-scanning return (FIG. 7, 426, 42).
7,428). When the sub-scanning returns, the recording head access 22 is released and the imaging/recording sub-scanning motor 1 is activated.
25, 16, and the sub-scanning clutches 127, 1
7 is released, and the imaging/recording sub-scanning platforms 120, 20 return to the sub-scanning start position by the restoring force of the spring springs 23, 132. Next, the processing device 300 drives the printing mechanism 350 for development, transfer, paper feeding, fixing, cleaning, etc. to perform print processing (FIG. 7, 429). As shown in FIG. 5C, the thus obtained copy comes out with the shaded area 171 of the original 101 copied onto the shaded area 172 of the copy 154.

Next, the case of copying from the beginning of the original to the scale 3 (hatched area 173) as shown in FIG. 8B will be described. In this case, the operator uses the numeric keypad 160.
After pressing the "3" button, press the start button 15.
All you have to do is press 7. As mentioned earlier, the seventh
When the starting point is input in the figure (404 in FIG. 7), "PO-3" is displayed on the numerical display device 159 (406 in FIG. 7). This number "3" is register C3
It's in 01. Here, if you press the start button without inputting the end point as shown by the broken line 431 in FIG.
It progresses to 416. When reaching 416 in FIG. 7, the register B302 is "0" because no number was entered from the numeric keypad 160. Also, since the sub-scanning mechanism of the imaging unit has not moved yet, the counter 30
4 is also "0". Therefore, judgment box 41
6 becomes YES, and the process proceeds to 420, where imaging and latent image recording are started. That is, imaging is started from the starting point of the original 101, and the latent image is recorded on the recording drum 1.
As shown in FIG. 7, the flow progresses to the imaging sub-scan 120.
When the counter 304 moves to a point corresponding to the scale "3", the counter 304 becomes "3", so the decision box 425 becomes YES and copies are obtained as described above. In this way, a copy 154 as shown in FIG. 8c is obtained. The shaded area 173 of the original document 101 is copied onto the shaded area 157 of the copy 154 . The reason why the starting point is set in register C and "PO-2" is displayed at that point is so that when 0 is the starting point, the operator only needs to input the ending point.

Next, as shown in FIG.
71 is copied to the same position as the original and the copy, such as the shaded area 175 of the copy 154. A flowchart in this case is shown in FIG. The flow before block 414 and after block 420 is exactly the same as in FIG.

At 416 in FIG. 10, counter B304 and register B302 are compared. At first counter B304
= "0" and register B302 = "2", so
Flow continues to 440. At this time, the processing device 300 issues a latent image recording prohibition signal to the recording head control circuit 24 to prohibit energization of the recording head 2. Then, the sub-scanning of both the imaging section and the recording section moves at high speed to the starting point scale "2" (441 in FIG. 10). The imaging sub-scanning table 12 reaches the “2” mark on the scale 151.
0 moves, the recording sub-scanning table 20 also moves to the corresponding position in the sub-scanning direction of the recording drum 1. Here, since the counter B304 is "2", the decision box 416 becomes YES and the block 42
0, and thereafter latent image recording and printing processing is performed as described above. The sub-scanning mechanisms of the imaging section and the recording section moved at the same time, and energization of the recording head 2 was prohibited until it reached the starting point scale "2", so the resulting copy was as shown in FIG. 9C.
A portion 178 of the copy corresponding to the unnecessary portion 176 of the original 101 is not recorded and becomes white.
Only the copy portion 175 corresponding to the diagonally shaded portion 171 is recorded.

In the above description, the imaging sub-scanning detectors 211 to 22
0 was used, but next we will introduce a method using counter C307 (Fig. 6) in place of these detectors.
This will be explained with reference to the flowchart in the figure. Let us now assume that the length of the sub-scan is 300 mm, and that the interval between the scales 151, which are divided into 10 equal parts, is 30 mm. The sub-scanning line density is 10 lines/mm,
Sub-scanning is 1 line per rotation of the recording drum, or 0.1mm.
Assume that it moves. Then, the interval of scale 151 is
10 x 30 = 300 sub-scans. counter C30
7 is configured to generate one pulse when counting 300. Processing device 300 and counter C3
Signal lines are connected to 07 by broken lines 308 and 309 (FIG. 6). When you move the sub-scan one line,
That is, the processing device 300 sends one pulse to the counter C307 for every 0.1 mm movement. When the sub-scanning advances by one scale interval, the counter C307 counts 300 pulses and returns one pulse to the processing device 300. This pulse plays the same role as the pulses output by the sub-scanning position detectors 211-220 in FIG. Therefore, the flow of blocks 416 to 425 in FIG. 7 is changed to that in FIG. 11, but the other parts are the same. Consider the case where the portion from scale "2" to "5" mentioned above is to be copied. 4 in Figure 11 as well as the example in Figure 7.
The flow progresses until 16. At first, the counter B=0 and the register B=2, so the flow advances to 445 and the imaging sub-scan moves by one line at high speed. Then, the counter C307 counts 1 (446 in FIG. 11). If the predetermined value of the counter C307 is temporarily set to 300 as described above, the judgment block 447 becomes NO and the imaging sub-scan is set to 1 again.
The row advances, and the count of the counter C307 advances by one (FIG. 11, 445, 446). 445,4 in Figure 11
When 300 lines of sub-scanning are performed by repeating the steps 46 and 447, the count value of counter C307 becomes 300.
Therefore, the decision block 447 becomes YES, and the flow advances to 419, where the counter B304 counts 1. This means that the imaging sub-scanning table 120 is at the imaging scale 15.
It means that you have reached the "1" of 1. The flow then returns to 416 and counter B304=
Since "1" register B302 = "2", the flow repeats 445, 446, 447 again, and eventually the counter C307 counts 300 again and increments the count of the counter B302 by one (Fig.
9). Decision block 416 then returns YES and flow continues to 420. Here, imaging and latent image recording is performed, and the sub-scanning mechanism is moved at a regular speed (one line per one rotation of the recording drum 1), and the counter C is
After counting 307 and proceeding 300 lines further, counter B
304 and continues this operation until the counter B305 reaches "5" (Fig. 11, 4).
20,421,448,449,450,42
5). When the counter B304 reaches "5", the decision block 425 becomes YES, and the latent image recording is completed and the printing process is performed in exactly the same manner as in the case of FIG.

Next, a case where one copy is obtained by combining parts of two or more original documents as shown in FIG. 12 will be described. That is, as shown in FIG. 12b, the portion 171 of the scales 2 to 5 of the original 101A is placed on the portion 179 of the copy 154, and the portion 180 of the scales 1 to 4 of the original 101B is placed on the copy 154 as shown in FIG. The case of copying to the part 181 will be explained as an example. The control flow in this case is
Shown in Figure 3.

First, the operator places the document 101A on the document table 102, inputs the starting point "2" and the ending point "5" from the numeric keypad 160 in exactly the same way as in the case of FIG. 7, and presses the start button 157 (in FIG. 401-41
1). Then, the processing device 300 determines that this is the first partial copy start (13th
460) Proceeding to block 413, imaging and latent images of the original 101A from scale "2" to "5" are performed in the same manner as in the case of FIG.
13-425). Next, the processing device 300 stops the recording sub-scanning mechanism at that point (see FIG. 13, 46).
1). To do this, the phase advance of the recording sub-scanning pulse motor 16 is stopped, the current is kept flowing through the winding of the pulse motor 16, and the current is kept flowing through the clutch 17 as well. Imaging sub-scanning table 12
0 returns to the imaging start position. That is, as described above, the current of the imaging sub-scanning clutch 127 is turned off, the imaging sub-scanning table 120 is returned to the starting point of imaging by the force of the spring spring 132, and the fluorescent lamp 103 is turned off (FIG. 13, 462 and 463). Also, the number display device 15
The number displayed at 9 is returned to the initial "PO-0" and blinks to inform the operator that the next document should be set (464 in FIG. 13). At this point, the operator has one more document 101B (FIG. 13, 465), so the document 101A and document 101B are
Then, input the starting point "1" and ending point "4" of the original 101B, and press the start button (FIG. 13, 465, 404-411). The fluorescent lamp 103 that was previously turned off is turned on again (412 in FIG. 13).
Since this is the second start, decision block 460 is NO and the flow jumps to block 416. Since latent image erasing 414 is not performed, the original 101
The latent image in the portion A, that is, the portion 179 of the copy 154 remains on the recording drum 1. Then blocks 416, 417, 418, 4 in FIG.
As shown in 19, the imaging sub-scanning table 120 moves to the starting point "1" of the second document. During this time, the recording sub-scanning table 20 remains stopped at the point where the latent image of the document 101A has been recorded (the point corresponding to 182 in FIG. 12) and waits. Next, the second manuscript 101
Imaging and latent image recording are performed from the starting point "1" to the ending point "4" of B (FIG. 13, 420-425).
At this point, the shaded area 180 of the original 101B shown in FIG. 12d has been converted into a latent image on the recording drum 1 corresponding to the shaded area 181 of the copy 154.
Here, similarly to when the imaging and latent image recording of the first document 101A is completed, the processing device 300 stops the recording sub-scanning table 20 at this point, and the imaging sub-scanning table 12 stops.
0 to the sub-scanning starting point, the fluorescent lamp 103 is turned off, and the numeric display device 159 flashes as "PO-0" to inform the operator that partial copying of the second original 101B has been completed (Fig. 13). 461,
462, 463, 464). Since the operator does not have any more documents, he presses the print button 183 on the operation panel (466 in FIG. 13). Then, the processing device 300 brakes the recording motor 28 to decelerate the recording drum 1 (426 in FIG. 13), cuts off the current to the recording sub-scanning motor 16, cuts off the current to the sub-scanning clutch 17, and turns off the recording head access solenoid 22. The current is cut off, and then the current of the recording head 2 is cut off to perform a return of the recording sub-scan (first
3 figure 468). Next, development, paper feeding, transfer, fixing,
The printing mechanism 350 such as cleaning is operated to perform printing processing (429 in FIG. 13), and a copy as shown in FIG. 12e is obtained.

Another application example of the example of FIG. 12 is shown in FIG.
In FIG. 14, a copy 154 is obtained from one original 101 with the image position converted. The operator places the original 101 on the original platen glass 102, presses the partial copy button 158, and then presses the numeric keypad 16.
0, enter the numbers on the imaging scale 151, the starting point "5" and the ending point "10", then press the start button 157
Press. Then, as mentioned above, the diagonal line 1 of the original 101
A latent image is formed on the recording drum 1 so that the portion 83 corresponds to the diagonally lined portion 184 of the copy 154 .
When the flow in FIG. 13 reaches 464, the operator leaves the document 101 as it is without replacing it.
Next, input the number "5" from the numeric keypad 160 and press the start button 157. Then, similar to the flow shown by the broken line 431 in FIG. 7, the starting point is "0".
The end point will be "5". Therefore, latent image recording is performed so that the diagonally lined portion 185 of the original 101 becomes the diagonally shaded portion 186 of the copy 154. When the flow reaches block 465 in FIG. 13, the flow continues from block 466 onwards, resulting in a copy as shown in FIG. 14c.

Still another example of application is shown in FIG. In FIG. 15, a copy with the front and back sides printed on one side is obtained from an original with writing written on both the front and back sides. In exactly the same way as in the case of Fig. 12, if you partially copy the front side from "0" to "5" as the first document, the front side will be copied from "0" to "5" on the front side as the second document.
It will be easily understood that if a partial copy is made up to the point where the back side 189 is copied, the portion of the back side 189 becomes the copy 190.

To simplify the explanation above, the imaging scale 151 is
I divided it into 10 equal parts, but for practical purposes I would cut it into smaller pieces, for example 10mm apart. For example, even if the manuscript table is the size of an A4 sheet, it will be divided into 30 equal parts, and the number to be entered will be 2 digits, for example "11 to 25". In this case, the number display device will display "11.25" and "・"
If it is decided to blink, the number display device 160 will only need to have 4 digits as in the previous embodiment, and the operator can be informed that the start point of partial copying is being displayed by blinking "." each time. . In the embodiment shown in FIG. 13, the operator presses the print button 183 after finishing imaging the second document, but after inputting the start point and end point of the second document, the operator presses the start button 157.
The print button 183 may be pressed immediately after pressing . In this case, the processing device 300 remembers that the print button 183 was pressed, and when it finishes imaging and recording the latent image of the second document, it automatically prints the image without waiting for the operator to press the print button again. It is convenient to start processing such as sub-scanning return.

In addition, although the input means for the reading part of the original is input using a numeric keypad as an example, it is also possible to input a coded signal from an appropriate external processing device via an interface circuit.

Although the basic embodiments have been described above, various modifications are possible within the scope of the idea of the present invention. There is no need to enumerate them here, and those skilled in the art can easily perform them.

As explained above, according to the present invention, the operator can obtain a copy of only a portion by simply placing a document on the document table and inputting a number according to the scale using the numeric keypad. Since you can also obtain a copy, you are freed from troublesome manual work.

[Brief explanation of drawings]

FIG. 1 shows an image pickup mechanism of a copying machine according to an embodiment of the present invention, FIGS. 2 and 3 show a recording mechanism of a copying machine according to the present invention, and FIG. 4 shows an external appearance of a copying machine according to the present invention. FIG. 5 is a comparison between an original and a copy according to an embodiment of the present invention, FIG. 6 is a block diagram of a control device of a copying machine according to an embodiment of the present invention, and FIG. 7 is a flowchart of control.
Figure 8 is a comparison of originals and copies of other embodiments, Figure 9
The figure also shows a comparison between the original and the copy of another example.
Fig. 0 is a control flowchart of another embodiment, Fig. 11 is a control flowchart of yet another embodiment, Fig. 12 is a comparison between original and copy of another embodiment, and Fig. 13 is a control flowchart of another embodiment. The control flowcharts, FIGS. 14 and 15, are comparisons between an original and a copy in another embodiment.

Claims (1)

[Scope of Claims] 1. Recording scanning means that includes a recording head that receives an electrical image signal and forms a magnetic latent image on a rotating recording drum, and scans the recording head in the axial direction of the recording drum, and the recording drum. A recording drum 1 that rotates in synchronization with the rotation of the recording drum 1 and represents the position on the circumference of the recording drum.
a rotary encoder that generates one index pulse per rotation and a plurality of clock pulses during the interval between the index pulses; and an imaging device that scans a document placed on a document table and obtains the electrical image signal by controlling the clock pulses. a scanning means, a scale means for reading the position of the document in the sub-scanning direction on the document table, and an input for inputting a reading start point and a reading end point of the partial area of the document read by the scale means. means, a first storage means for storing the reading start point, a second storage means for storing the reading end point, and a first storage means for storing the reading end point;
an imaging scanning position detection means that generates one pulse corresponding to a scale; a counting means that counts the pulses from the imaging scanning position detection means; and information on the contents of the first storage means and the contents of the counting means. a first comparator for detecting a match; a second comparator for detecting a match between contents of the second storage means and contents of the counting means; and a second comparator for detecting a match between the contents of the second storage means and the contents of the counting means; control means for detecting coincidence with a comparator and moving the recording scanning means to start forming a magnetic latent image on the recording drum; detecting coincidence with the second comparator and ending the formation of the magnetic latent image; 1. A copying machine characterized in that the copying machine is equipped with a copying machine so as to obtain a copy of a desired partial area of a document. 2. Recording scanning means that includes a recording head that forms a magnetic latent image in response to an electrical image signal on a rotating recording drum, and scans the recording head in the axial direction of the recording drum; Recording drum 1 that rotates and represents the position on the circumference of the recording drum
a rotary encoder that generates one index pulse per rotation and a plurality of clock pulses during the interval between the index pulses; and an imaging device that scans a document placed on a document table and obtains the electrical image signal by controlling the clock pulses. a scanning means, a scale means for reading the position of the document in the sub-scanning direction on the document table, and an input for inputting a reading start point and a reading end point of the partial area of the document read by the scale means. means, a first storage means for storing the reading start point, a second storage means for storing the reading end point, and a first storage means for storing the reading end point;
an imaging scanning position detection means that generates one pulse corresponding to a scale; a counting means that counts the pulses from the imaging scanning position detection means; and information on the contents of the first storage means and the contents of the counting means. A first comparator for detecting a match, a second comparator for detecting a match between the contents of the second storage means and the contents of the counting means, the imaging scanning means and the recording scanning means move simultaneously. control means for forming a magnetic latent image on the recording drum only from the detection of coincidence by the first comparator to the detection of coincidence by the second comparator; A copying machine characterized in that it obtains copies of partial areas. 3. Recording scanning means including a recording head for forming a magnetic latent image in response to an electrical image signal on a rotating recording drum, and scanning means for scanning the recording head in the axial direction of the recording drum; Recording drum 1 that rotates and represents the position on the circumference of the recording drum
a rotary encoder that generates one index pulse per rotation and a plurality of clock pulses during the interval between the index pulses; and an imaging device that scans a document placed on a document table and obtains the electrical image signal by controlling the clock pulses. a scanning means, a scale means for reading the position of the document in the sub-scanning direction on the document table, and an input for inputting a reading start point and a reading end point of the partial area of the document read by the scale means. means, a first storage means for storing the reading start point, a second storage means for storing the reading end point, and a first storage means for storing the reading end point; an imaging scanning position detection means that generates one pulse corresponding to a scale; a counting means that counts the pulses from the imaging scanning position detection means; and information on the contents of the first storage means and the contents of the counting means. a first comparator for detecting a match; a second comparator for detecting a match between the contents of the second storage means and the contents of the counting means; detecting a coincidence and moving the recording scanning means to start forming a magnetic latent image on the recording drum; detecting a coincidence with the second comparator and ending the formation of the magnetic latent image, and at the same time start the recording scanning. control means for temporarily stopping the means and then restarting movement of the recording scanning means and formation of magnetic latent images by detecting a coincidence with the first comparator; A copying machine is characterized in that it obtains a composite copy.