JPS61223863A - Image forming device - Google Patents

Abstract

PURPOSE:To form a painted out image of a prescribed shape at a prescribed part, by forming an image of a designated shape at a designated part by using a function which erases the image of a designated extent of an original. CONSTITUTION:An original is set to an original placing table and a line designating mode is set by depressing a line designating key 30h. Then a spot light 131 is moved by operating operation keys 30a-30d and a painted out part is designated on the original G by operating a position designating key 30e. When a copying key 301 is depressed under this condition, the image of the original is formed on paper (P), and then, a multi-copying unit operates and sends the paper (P) to a photosensitive drum 10 side again. Thereafter, an erasing array 150 is turned on and controlled and an electrostatic latent image L is formed on the drum 10. The latent image is developed, transferred, and fixed and a painted out picture whose extent is designated on the original G is formed on the paper (P).

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image forming apparatus applied to, for example, an electronic copying machine.

[Technical background of the invention and its problems]

In general, an electronic copying machine has a function of copying an original image onto paper as is, or enlarging or reducing the original image and making a copy.

By the way, a document image may include unnecessary parts or parts that should be enlarged or reduced. However, conventional copying machines cannot erase parts of the original image, or enlarge or reduce the original image to make a copy, and furthermore, they cannot form an image in the necessary shape in the necessary part. there were.

[Purpose of the invention]

This invention has been made based on the above circumstances, and its purpose is to be able to selectively erase any part of a document image, and to fill in a desired shape in a desired part. The purpose of the present invention is to provide an image forming apparatus capable of forming images.

[Summary of the invention]

For example, this invention makes it possible to form an image of a specified shape in a specified part using a function for multiple copying of a document, a function for specifying an arbitrary range of a document, and a function for erasing images within and outside the specified range. This is what I did.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

5 and 6 schematically show an image forming apparatus 9, such as a copying machine, according to the present invention.

That is, 1 is a main body of a copying machine, and a document table (transparent glass) 2 is fixed to the upper surface of the main body 1 to support a document. On this document table 2, there is a fixed scale 21e2 that serves as a reference for setting the document! Further, near the document table 2, there is a document cover 11 that can be opened and closed, and a work table 1! is provided. The original set on the original platen 2 is moved back and forth by an optical system consisting of an exposure land 4 and a mirror 5°6.7 along the lower surface of the original platen 2 in the direction of arrow a. It is designed to be exposed and scanned. In this case, mirror 15.7 moves at the speed A of mirror 5 so as to keep the optical path length constant. The light reflected from the original by the scanning of the optical system, that is, the light reflected from the original by the light irradiation of the exposure rung 4 is reflected by the mirror 5,
6. Lens block 8 for variable magnification reflected by 7
The document is reflected by a mirror 9 and guided to a photoreceptor drum 510, so that an image of the document is formed on the surface of the photoreceptor drum 100.

The photosensitive drum 10 rotates in the direction of arrow C, and its surface is first charged by the charger 11, and then the image of the document is exposed to slit light to form an electrostatic latent image. is made visible by applying toner by a developing device 12. On the other hand, the paper (image-forming object) P is taken out one by one from the selected upper paper feed cassette 13 or lower paper feed cassette 14 by the feed roller 15 or 16, and the paper guide path 1
2 or 18, and is guided to a pair of registration rollers 19, and sent to a transfer section by the pair of rollers 19. Here, each of the paper feed cassettes 13 and 14 is removably provided at the lower right end of the main body 1, and one of them can be selected from an operation panel to be described later. In addition, each of the above paper feed cassettes 13 and 14
are cassette size detection switches 601, 60., respectively.
The cassette size is detected by This detection switch 601.60. is composed of a plurality of microswitches that are turned on and off according to the insertion of cassettes of different sizes.

On the other hand, the paper P sent to the transfer section is charged by the transfer charger 200.
By coming into close contact with the surface of the photoreceptor drum 100,
The toner image on the photoreceptor drum 10 is transferred by the action of the charger 200 described above. The transferred paper P is peeled off from the photoreceptor drum 10 by the action of the peeling charger 210 and conveyed on the conveyor belt 22, and sent to a pair of fixing rollers 23 as a fixing device provided at the terminal end of the conveyor belt 22. The transferred image is fixed by passing through. Then, the paper P after fixing is
Tray 2 outside the main body 1 by paper ejection roller pair 24°604
It is designed to be discharged at 5. Further, after the transfer, the photosensitive drum 10 is neutralized by a charger 26 for neutralization, residual toner on the surface is removed by a cleaner 22, and afterimages are erased by a static elimination rung 28 to return to the initial state. ing. Note that 29 is a cooling fan for preventing the temperature inside the main body 1 from rising.

Furthermore, a multiple copying unit 603 is provided at the bottom of the main body l, which is used during editing and copying, which will be described later. This multiple copying unit ) 603 transfers the paper sent out by the pair of paper ejection rollers 24 to the pair of registration rollers 19 in order to make further copies on the same side of the paper that has been copied once.
It is meant to return to. That is, this multiple copying unit 60g
Inside, a sorting p-toro 0B is provided between the paper ejection roller pair 24 and 604.

For this distribution, the gate 60s is in the state shown by the solid line during normal copying, and is operated as shown by the dotted line during editing copying.
The paper sent out by the pair of paper ejection rollers 24 is transferred to the transport bell)
It is designed to guide you between 60@ and 6070. These conveyor belts 606 and 607 grip and convey the paper and guide it into the guide path 60a, and the paper introduced into the guide path 608 is sent to the photosensitive drum 10 again in synchronization with the optical system. It looks like this.

FIG. 7 shows the operation panel 30 provided on the main body 1. 301 is a copy key for commanding the start of copying; 303
303 is a numeric keypad used to set the number of copies, etc.; 303 is a display unit that displays the operating status of each part and paper jams; and 304
30s is a cassette selection key for selecting the upper and lower paper feed cassettes 13 and 14; 30s is a cassette display section for displaying the selected cassette; 306 is a magnification setting key for setting the copy enlargement and reduction magnification in a predetermined relationship; 307 30s is a display section that displays the set 9 magnifications; 309 is a density setting section 13°a a 3 (' b lJ Oc
, J Od k"A are operation keys for moving the spot light source indicating the erasing position of the original, which will be described later. 30m is a position specification key for inputting the coordinate position indicated by the spot light source.
30f.

30g is an erase range specification key that specifies the erase range at a specified position, soh is a line specification key that specifies the filled part of the paper on which the image is formed, and 30 is a light emission that displays the operation status of the line specification key sob. This is the display section.

FIG. 8 shows an example of the configuration of a drive source for each drive section of the copying machine constructed as described above, and is composed of the following motors. That is, 31 is a lens motor, which is a motor for moving the position of the lens glock 8 for changing the magnification. A mirror motor 32 is a motor for changing the distance (optical path length) between the mirror 5 and the mirror 6.1 for changing the magnification. 33
is a scanning motor, which operates the exposure run f4 and the mirror 5;
This is a motor for moving the mirror 6.2 for scanning the original. A shutter motor 34 is a motor for fully moving a shutter (not shown) for adjusting the charging width of the photosensitive drum 10 by the charger 11 during zooming. A developing motor 35 is a motor for driving the developing roller of the developing device 12 and the like. A drum motor 36 is a motor for driving the photosensitive drum 10. A fixing motor 37 is a motor that drives the paper conveying path 22, the pair of fixing rollers 23, and the pair of paper ejecting rollers 24. A paper feeding motor 38 is a motor for driving the delivery rollers 15 and 16. Reference numeral 39 denotes a paper feed motor, which is connected to the registration roller pair 19.
This is a motor for driving. 40 is a fan motor, which is a motor for driving the cooling fan 29;
1 is a motor for driving conveyor belts 606 and 607.

FIG. 9 shows a drive mechanism for reciprocating the optical system. That is, the mirror 5 and the exposure lamp 4 are supported by a first carriage 411, and the mirror 6.7 is supported by a second carriage 412, and these carriages 411.41' are supported by guide rails 421.42. It is guided by and can freely move in parallel in the direction of arrow a. That is, the four-phase armature motor 33 drives the pulley 43. An endless belt 45 is stretched between the pulley 43 and the idle pulley 44, and one end of a first carriage 411 that supports the mirror 5t is fixed to a midway portion of the belt 45. On the other hand, the rail 4280 guide portion 46 of the second carriage 412 that supports the mirror 6.7 has a rail 4
2! Two pulleys 1747 and 47 are rotatably provided apart from each other in the axial direction, and a wire 48 is stretched between these pulleys 4 and 4. One end of this wire 48 is fixed to a fixing part 49, and the other end is fixed to the fixing part 49 via a coil ring 50, respectively. Further, one end of a first carriage 411 is fixed to a midway portion of the wire 48. Therefore, as the pulse motor 33 rotates, the belt 45 rotates, the first carriage 411 moves, and the second carriage 412 also moves accordingly. At this time, since the pulleys 47 and 4'i serve as movable pulleys, the second carriage 412 moves in the same direction as the first carriage 411 at a speed of A. In addition, 1. Second carriage 4 zl, 41. The direction of movement is controlled by switching the direction of rotation of the Nolles motor 330.

Further, on the document table 2, a copyable range corresponding to the specified paper is displayed. That is, let the paper size specified by the paper selection key 304 be (Px, Py),
Magnification setting key 306.

If the copy magnification designated by 307 is K, the copyable range (x, y) is x = Px / K y = Py /. Of this copyable range (: c, y), the X direction is indicated by the pointer 51° 52 provided on the back surface of the document table 2, and the y direction is indicated by the scale provided on the top surface of the first carriage 411. 53.

As shown in FIG. 10, the above-mentioned pointers 51 and 52
, 55 via a spring 56.

The pulley 55 is rotated by a motor 58, and by driving this motor 58 according to the paper size and magnification, the distance between the pointers 51 and 52 can be changed.

Further, the first carriage 411 is moved to a predetermined position (home positive scene according to the magnification) by driving the motor 33 according to the paper size and magnification. Then, when the copy key 301 is pressed, the first
The carriage 411 is first moved toward the second carriage 41g, and then the run f4 is turned on and moved away from the second carriage 412.

When scanning of the original is completed, the lamp 4 is turned off and the first lamp is turned off.
The carriage 411 is returned to the home position.

FIG. 11 shows the overall control circuit, including the main processor group 71 and the first processor group 71. It is mainly composed of a second sub-processor group 72 and 73. The main Zorocessor group 71 is
The operation panel 30 and various switches and sensors, such as the cassette size detection switch 50g, 60! A high-voltage transformer 76 that detects inputs from input devices 75 such as, and drives the various chargers, the static elimination lamp 28, the blade solenoid 27& of the cleaner 27, the heater 23a1 of the fixing roller pair 23, the exposure run f4, and The motors 31 to 40.5B, 61.77, etc. are controlled to perform the copying operation described above, and the spotlight m1 is
31. Nollus motor 135%? 1i-7L'i15
0, controls the array drive unit 160, memory 140, etc. to erase unnecessary portions of the document. In addition, the soot light source 131, the four-wheel motor 135, and the erasing array 15
0, array drive unit 1601 memory 140 will be described later.

Among the above motors 31 to 40.58, motor 35.37
, 40, 401 and the toner motor 77 that supplies toner to the developing device 12 is controlled by the main processor group 71 via a motor driver 78. The motor 36 is controlled by the first processor group 72 via the pp pulse motor driver 79.
．． 39, 38, 511 are Noyarus motor drivers 80
It is controlled by the second sub-processor group 73 via. Finally, the exposure lamp 4 is controlled by the main processor group 71 via the lamp regulator 81, and the heater 23m is controlled by the main processor group 71 via the heater control section 82.

Then, from the main processor group 71, the first. Second sub-processor group 12. Commands to drive and stop each motor are sent to the first motor '13. A status indicating the drive or stop state of each motor is sent from the second sub-processor group 72, 73 to the main processor group 7. Further, the first sub-processor group 72 receives position information from a position sensor 83 that detects the initial position of each of the motors 31 to 34 and 67.135.

FIG. 12 shows an example of the configuration of the main processor group 71. That is, numeral 9 denotes a one-chip microcomviator (hereinafter simply referred to as a microcomputer), which performs key human power detection and various display controls for four operation channels (not shown) through an input/output port 92. Also, microcomputer 9
1 is expanded by input/output ports 93-96.

And input/output/-) 9 J has high voltage transformer 76
, a motor driver 78, a lamp regierator 81, and other outputs, the input/output port 94 is connected to a size switch for detecting the paper size and other manual input, and the input/output port 95 is connected to a copy condition setting switch and other manual input. etc. are connected. It should be noted that the input/output port 96 is for use as an input/output port.

FIG. 13 shows an example of the configuration of the first sub-processor group 22. That is, 10 is a microcomputer connected to the main processor group 7I. 102 is a programmable interval timer for controlling the phase switching interval time of the armature motor, and the setting value is set from the microcomputer 101. When the timer 102 is counted out, the end signal and pulse are output to the interrupt line of the microcomputer 101.The timer 102 is inputted with the reference value of 9 pulses. The position information from the position sensor 83 is input to the input/output ports 103 and 104.

The input/output port 104 is connected to the motors 31 to 34, 67, 1 via the armpit motor driver 79.
35 are connected. In addition, the above input/output/-to 103
is used, for example, when outputting the status signal of each nozzle motor to the main processor group 7I.

FIG. 14 shows an example of the configuration of the second processor group 73. That is, 111 is a microcomputer), which is connected to the main processor group 21. Numeral 112 is a programmable interval timer for controlling the phase switching interval of the pulse motor, and when a set value is set by the microcomputer 111, it counts based on the set value, and outputs an end pulse when the count is out.

This end i4. /! / is latched by the latch circuit 113Vc, and its output is supplied to the interrupt line of the microcomputer 111 and the input/output port input line. Also, microcomputer 111
An input/output port 114 is connected to the input/output port 114, and motors 36.degree.

FIG. 15 shows the control circuit of the arm/arm motor, and the input/output yll'-to 121 (corresponding to the input/output/-to 104, 114 in FIGS. 13 and 14) is connected to a pulse motor driver z22 (81111). Pulse motor driver 79 in the figure.
A 79 pulse motor 123 (equivalent to the pulse motor 31) is connected to this pulse motor driver 122.
~34°corresponding to 36.3B, 39.5B, 67.135) each winding A j A z B s hundred is connected.

FIG. 16 shows a speed control method for the i4 pulse motor, where (a) is the speed curve of the pulse motor, and (b) is the phase switching interval. As is clear from this figure, the phase switching intervals are long at first, gradually shorten, eventually become equal intervals, gradually become longer again, and then stop. That is,
This indicates the slew-up and slew-down of the four-speed motor, starting from the self-starting region, starting up, using the high-speed region, and eventually falling. In addition, tl, t,...
-tx indicates the phase switching interval time.

Next, the document image erasing means will be explained.

17 and 18, the first carriage 411 is provided with a guide shaft 130 along the run f4 in the part where the light of the lamp 4 is blocked, and this guide shaft 130 has an area for erasing the original. Spot light source 1 as a means for instructing
31 is movably provided. This spot light source 1
Reference numeral 31 denotes a light emitting element 132, such as a light emitting diode or a lamp, provided opposite to the document table 2, as shown in FIG.
and a lens 133, and the light generated by the light emitting element 132 is directed to the document table 2 with a diameter d.
It is designed to be irradiated as a spot light. This spot light has a brightness that allows it to pass through the document Gt, which is set on the document table 2 and is, for example, as thick as a postcard. Further, the spot light source 131 is connected to a timing belt (toothed belt) 134 disposed along the side axis xs'o. This timing belt 134 is passed between a pulley 136 and a driven pulley 137 provided on the rotating shaft of the nozzle motor 1350. Therefore, by rotating the pulse motor 135, the spot light source 1
31 is moved in a direction perpendicular to the scanning direction of the first carriage 411. Further, a position sensor 138 consisting of a microswitch for detecting the initial position of the spot light source 131 is provided in the first carriage 411 located at the end on the side of the idle shaft 1300 and the fourth motor 135. For example, when the spot light source 131 moves In the case where the spot light source 131 is brought into contact with the position sensor 138, the initial position is detected.

Next, a method for specifying the erasing range of a document using the spot light source 131 will be described with reference to FIGS. 19 to 21. This spot light source 131 is connected to the operation key 30. It is moved by operating ~30d. That is, when the operation keys 30b and 30d are pressed, the motor 33 is driven, and the first carriage 411 and the spot light source 13 are driven.
1 is moved in the scanning direction (arrow y direction shown in FIG. 19). Also, an operation key 30a.

When 30c is pressed, the motor 135 is driven, and the spot light source 131 is moved in a direction perpendicular to the scanning direction (in the direction of arrow X shown in FIG. 19).

The operator operates the operation keys 30a to 30d while visually observing the spot light transmitted through the document G, and presses the position designation key 30 after moving the switch light to the 81 point on the document G shown in FIG. 20, for example. .

Then, the coordinate position specified by sl is stored in the main processor group 71 shown in FIG. Similarly, when the position designation key 30e is pressed with the spotlight moved to 81 points on the document G, the positions of the 83 points are stored in the main processor group 71. The position of this spotlight can be detected, for example, by counting the number of driving pulses of the pulse motors 33, 135. After that, press the erase range designation key 30ft, as shown in Figure 20 (!L) (S1
A rectangular area (indicated by diagonal lines) having two points yS as diagonal points is designated as the erasing range. Also, as shown in Figure 20(b), if you specify 83 points and 4 IS points on the original G and press the erase range specification key sog, the area other than the square with 55 m and 54 points as diagonal points will be specified as the erase range. .

In this way, when the erase range designation keys 301m and 30g are pressed, the main processor group 71 performs calculations based on the two specified positions, and the memory 140 stores the high level signal @IJ'' in the erase range area. A low level signal @O'' is stored in the other parts. That is, this memory 14
0, for example, the capacitance in each column direction is approximately equal to the moving distance of the spot light source 131 in the X direction divided by the positional resolution in the In the case of FIG. 20(a), the second
As shown in Figure 1 (&), and in the case of Figure 20 (b), as shown in Figure 21 (b), a high level signal is sent to the address corresponding to the shaded area, and a low level signal is sent to an address outside that range. The level signal is stored.

In this case, the original is set with the copy side facing up, and after the erasure range is specified, it is turned over along the fixed scale 21 of the original table 2.

Therefore, the information stored in the memory 140 shown in FIG. 21 is also actually stored inverted in the column direction.

On the other hand, as shown in FIG. 22, an erasing array 150 serving as erasing means is provided close to the photosensitive drum 10, for example, between the charger 11 and the exposure section ph. This erase array 150 is shown in FIG.

As shown in FIG. 241, a plurality of light shielding cells 151 are arranged in a direction perpendicular to the rotation direction of the photoreceptor drum 100,
Inside each of these cells 151 are shown in FIG.
As shown in (b), a light emitting element 152 made of, for example, a light emitting diode is provided. Further, a light emitting element 152 is provided in the opening of each cell 151 facing the photoreceptor drum 10.
A lens 153 that focuses the light on the surface of the photoreceptor drum 100
is provided. The number of light emitting elements arranged in this erasing array 150 matches, for example, the capacity of the memory 140 in the column direction. Here, if the distance between the light emitting elements 152 is P and the number is N, the total length of the erase play 150 is Q = NXP.

The erase array 150 is driven by the array driver 160 described above. As shown in FIG. 26, this array driving section 160 includes a shift register 161 having the same number of bits as the number of pits in the column direction of the memory 1400, and a store register 16 in which the contents of this shift register 161 are held.
2. It is composed of a switch circuit 164 consisting of a plurality of switch elements 163 that are controlled on and off by each output signal of the store register 162, and the movable contacts 163 of these switch elements 163 are grounded, and the fixed contacts 163b is connected to each cathode of a light emitting element (light emitting diode) 152 constituting the erase array 150t. The seven nodes of each of these light emitting elements 152 are connected to the power supply vee through current limiting resistors R, respectively.

After specifying the erase range of the original as described above, close the original cover 11 and press the copy key ''-301.
As the first carriage 411 and photosensitive drum 10 are operated, data for one column is sequentially read from the memory 140 in the row direction (as shown in FIG. 21). This read data Dl is transferred to the shift register 161 of the array driving section 160 in response to the clock signal CLK. After one column of data has been transferred to the shift register 161,
The charged portion of the photoreceptor drum 10 forms an erase array 150.
When the latch signal LTH is reached, the main processor group 71 outputs the latch signal LTH, and the contents of the shift register 161 are supplied to the store register 162 in response to this signal. That is, since the erasing array 150 is arranged between the charger 11 and the exposure section ph, one column of data output from the memory 140 is, for example, when the angle between the erasing array 150 and the exposure section ph is 01. Yes, the photoreceptor drum 10 has an angular velocity ω
If the latch signal LTH is rotating at .theta.1/.omega., the output timing of the latch signal LTH is controlled so that it is supplied to the store register 162 before .theta.1/.omega..

Each switch element 163 of the switch circuit 164 is controlled by each output signal of this store register 162. That is, when the output signal of the store register 162 is at a high level, it is turned on, and when it is at a low level, it is turned off. As a result, the light emitting elements 152 connected to each switch element 163 are turned on when the switch element 163 is on, and are turned off when the switch element 163 is off. Therefore, among the charged portions of the photoreceptor drum 10, the portion where the light emitting element 152 is turned on is charged, and even if the charged portion is exposed thereafter, no electrostatic latent image is formed, and the document image is erased. This means that Thereafter, the data in the memory 140 is read out column by column in the same manner, and the image is erased.

Next, the main part of this output will be explained.

In the present invention, the above-mentioned spot light source 131 can be used to specify a desired range of a document, and the range specified by the spot light source 131 can be filled in with respect to the image formed during image formation.

That is, a document is set on the document table 2, and the line designation key 30h is first pressed to put the main processor group 71 into the line designation mode. After that, in the same manner as the erasure range specification operation, the operation keys 30 &~30d and the position specification key 30 are pressed.
Use e to specify the area to be filled in on the document. Third
Figure (a) shows an example of this, where 5axSh is the range designated on the document G to be filled.

After specifying the range to be filled in in this manner, when the copy key SO is pressed, a low level signal is stored in the address corresponding to the range to be filled in the memory 140 under the control of the main processor group 71, and a binder signal is stored in the other addresses. The signal is stored. Thereafter, copying operations are performed according to the flowchart shown in FIG.

That is, in step s1, the exposure rung 4 is turned on, the original is exposed and scanned, and a normal copying operation is performed. FIG. 3(b) shows an image of the document G formed on the paper P by this operation. When this copying operation is completed, Stella fS!
The multiple copying unit 603 is operated, and the paper P on which the original image has been formed is again sent to the photosensitive drum 10 side. When the paper P is sent to the photoreceptor drum 10 side, the photoreceptor drum 10 is driven in step S3, and the sent paper P is fed in synchronization with this drive. Thereafter, in step S4, the erasing array 150 is controlled to light up in accordance with the specified range as described above. That is, the second
As shown in Figures (a), (b), and (e), the light emitting elements 152 corresponding to the range designated according to the data stored in the memory 140 are turned off, and all other light emitting elements are turned on. At this time, the exposure run-I4 is turned off, and exposure scanning of the document is not performed. Therefore, the photosensitive drum 10
The 0 surface charge is left only in the specified range, and the other parts are erased. Thereafter, the electrostatic latent image formed on the photoreceptor drum 10 is developed by a developing device 12. FIG. 1 shows an example, in which L is an image developed on the photosensitive drum 10 and corresponding to a designated area.

By the way, as shown in FIG. 2, the light irradiated onto the photoreceptor drum 10 from each light emitting element 152 of the erasing array 150 converges in the rotational direction of the photoreceptor drum 10,
It is diffused to some extent in the longitudinal direction. Therefore, the width δ of the residual charge in the portion corresponding to the light-emitting element 152 that is turned off.

3δ is slightly narrower than the pitch P of the light emitting elements 152.

As described above, the image developed on the photosensitive drum 10 is transferred to the fed paper in step SII, and then fixed and discharged. Therefore, this paper P has the third
As shown in Figure (c), an image in which the specified range is filled in is formed overlapping the original image.

According to the embodiment described above, a predetermined range of the document is specified by the spot light source 131, and the image of the specified range can be erased using the erasing array 150. Therefore, it is convenient when editing a manuscript.

Furthermore, it is possible to designate any part of the document using the spot light source 131 and form a desired filled-in image.

Therefore, it is possible to form, for example, a bar graph or the like over the original image, which is convenient in practice.

Note that this invention is not limited to the above embodiments.

For example, the arrangement position of the erasing array 150 is not limited to between the charger 11 and the exposure section ph shown in FIG. 22, but may be arranged between the exposure section ph and the developing device 12 as shown in FIG. It is also possible to configure the electrostatic latent image that has been formed to be erased according to a designation.

Furthermore, the method of specifying the erasure range is not limited to the method of inputting the coordinates of diagonal points.

It goes without saying that other modifications can be made without departing from the gist of the invention.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to selectively erase any part of a document image, and also form an image that can form a filled-in image of a desired shape in a desired part. equipment can be provided.

[Brief explanation of the drawing]

1 and 2 each show an embodiment of an image forming apparatus according to the present invention, and FIG. 1 is a front view of the main parts shown for explaining the image forming operation using an erasing array;
Figure 2 (1) is a side sectional view showing the main part of Figure @1, and the same figure (b
), the same figure (, ) are front views showing the main parts of Figure 1, respectively.
FIG. 3 is a diagram showing an example of the image forming operation, FIG. 4 is a flowchart shown to explain the image forming operation, and FIG. 5 is a diagram showing an example of the image forming operation. 6 shows the configuration of the image forming apparatus, FIG. 5 is an overview perspective view, FIG. 6 is a side sectional view, FIG. 7 is a plan view showing the configuration of the operation/nine channel, and FIG. 9 is a perspective view schematically showing the drive mechanism of the optical system. FIG. 10 is a perspective view schematically showing the drive mechanism of the pointer. FIG. 11 is a perspective view schematically showing the drive mechanism of the optical system. FIG. 12 is a block diagram showing the control circuit, FIG. 12 is a block diagram of the main processor group, FIG. 13 is a block diagram of the first sub-processor group, FIG. 14 is a block diagram of the second sub-f processor group, and FIG. 15 is a block diagram of the main processor group. ! A schematic configuration diagram showing the control circuit of the Luss motor, Fig. 16 is a diagram shown to explain the speed control method of the i4 Luss motor, Fig. 17 is a perspective view of the main part showing the switch light source, and Fig. 18 shows the switch light source. FIGS. 19 to 21 are a side sectional view of the main part, and FIGS. 19 to 21 are plan views shown to explain the operation of specifying the erasing range of a document using a switch light source, respectively. FIG. 22 is a side sectional view of the main part showing the arrangement of the erasing array. A sectional view, FIG. 23, and FIG. 24 each show the relationship between the erasing array and the photosensitive drum, FIG. 23 is a perspective view showing only the main part, and FIG. 24 is a front view showing only the main part. 25th
The figures show the configuration of the erasing array, where (a) is a side sectional view, (b) is a partially cutaway front view, and Figure 26 is a circuit showing the configuration of the array drive section. Configuration diagram, No. 27
The figure is a side sectional view of the main parts showing another example of the arrangement of the erasing array. DESCRIPTION OF SYMBOLS 1... Copying machine main body, 2... Document table, 10... Photosensitive drum, 30a-30d... Operation keys, 30m...
・Position specification key, 30t*3'g...Erase range specification key, 30h...Line specification key, 41! ...First carriage, 603...Multiple copying unit, 21...
Main processor group, 131... spot light source, 13
2... Light emitting element, 133... Lens, 135...
zJ? Ruth motor, 150... Erasing array, 152...
...Light emitting element, 153...Lens, 160...Array drive section, 140...Memory, P...Paper, Ph.
...Exposure section. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Figure 4 Figure 8 Figure 10 Cause 14 Prisoner Figure 17 Figure 18 d Figure 19 Figure 20 (a) Figure 20 Figure 21 (a) (b) Fig. 22 Fig. 27 Fig. 23 Fig. 24 (a) (b) Fig. 26 1zuO Procedural amendment □ 1 JO 0 min. 2 to 1, Indication of case Patent application 1986-65240 No. 2, Name of the invention Image formation snowmaking 3, Relationship with famous case to be amended Patent applicant ■ Toshiba Corporation 4, Agent address 17 Mori Building, 26-5 Toranomon IJ, Minato-ku, Tokyo 〒105 Telephone 03 (502) 3181
(Main representative) 3. Full text of the subject specification of supplementary IF 7. Contents of amendment - 17″N

Claims (3)

[Claims] (1) A scanning device that moves along the document table optically scans the document placed on the document table, and forms a reflected light image from the document onto a charged image carrier. In an image forming apparatus that forms an electric charge pattern, develops this electric charge pattern, and then transfers and fixes it to a transfer material to form an image, a conveyance method that transports the transfer material on which the image is formed to the image carrier again. means, a designation means provided in the scanning means for designating an arbitrary range of the document using transmitted light, and an erasing means for erasing charges outside the designated range from the image carrier during image formation; An image forming apparatus characterized by comprising: a control means for developing the erased image carrier and filling out the specified range of the transfer material conveyed by the conveyance means. (2) The indication means is provided in the scanning means, is movable in a direction perpendicular to the moving direction of the scanning means, and comprises a light emitting element and a lens that irradiates the original with spot light. The image forming apparatus according to item 1. (3) The image forming apparatus according to claim 1, wherein the erasing means comprises a plurality of light emitting elements arranged near the image carrier along the longitudinal direction of the image carrier. .