JP3107880B2 - Digital copier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital copying machine for temporarily storing image data read by a scanner in a memory and outputting the image data to a printer via the memory. It relates to the intended digital copier.

[0002]

2. Description of the Related Art As a conventional digital copying machine, for example,
Some have a page memory inside. In such a digital copying machine, image data for one document read by a scanner is temporarily stored in a page memory and transferred from the page memory to a printer for printing.
It is possible to repeatedly execute image formation a plurality of times in one scan scan, and to speed up the copying operation.

A digital copying machine having a plurality of page memories for storing image data of a plurality of originals has also been developed. In such a digital copying machine, image data can be read from a page memory and printed by a printer, while simultaneously reading an original by a scanner. Therefore, the subsequent document can be read in advance by the scanner.

Further, as disclosed in Japanese Patent Application Laid-Open No. Sho 62-294378, a forming means for reading an original image and forming image data, a memory capable of storing image data of a plurality of pages, and a memory which is stored in the memory. Means for repeatedly outputting the same image data, generating information capable of storing the image data when there is an empty area in the memory, and displaying the read operation of the original document. A device has been proposed.

[0005]

However, according to the conventional digital copying machine, the image data read from the scanner is written in the page memory as it is, regardless of the free space in the memory. When large image data is input, there is a problem that image data in a portion exceeding the capacity of the page memory is lost.

According to Japanese Patent Application Laid-Open No. 62-294378, it is possible to know whether or not there is a free memory space at the start of reading a document. In the case where the memory over occurs, there is a problem that the image data in a portion exceeding the capacity of the page memory is also lost.

[0007] The present invention has been made in view of the above, and an object of the present invention is to reliably prevent loss of image data when image data is read and stored in a memory.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an image reading means for scanning an original to read image data, a memory means for storing the read image data, and a memory means for storing the read image data. In a digital copying machine provided with an image recording means for reading out image data and recording it on recording paper, and an operation display means for inputting or displaying information necessary for a copying operation, a digital copying machine is provided with an image reading means. Before starting reading, the maximum readable document size is obtained based on the remaining memory amount of the memory means and the reading magnification set via the operation display means, and the reading magnification and the maximum document size are obtained via the operation display means. To provide a digital copying machine provided with a control means for displaying.
Another object of the present invention is to provide a digital copying machine that displays an image size instead of the document size.

According to another aspect of the present invention, there is provided an image reading means for scanning an original to read image data, a memory means for storing the read image data, and an image stored in the memory means. In a digital copier equipped with an image recording means for reading data and recording it on recording paper, and an operation display means for inputting or displaying information necessary for a copying operation, a digital copying machine is provided before the image reading means starts reading a document. , Based on the remaining memory capacity of the memory means, determine the number of readable originals by size for each reading magnification,
Ru der provides a digital copying machine having a control means for displaying the size by the number of readable document for each scanning magnification through the operation display unit.

[0010]

In the digital copying machine of the present invention, the control means obtains the maximum readable original size based on the remaining memory amount of the memory means and the reading magnification before the image reading means starts reading the original. The reading magnification and the maximum original size are displayed via the operation display means.

In the digital copying machine of the present invention,
The control means obtains the number of originals that can be read for each reading magnification based on the remaining memory amount of the memory means before starting reading of the original by the image reading means, and via the operation display means, for each reading magnification. The number of readable originals by size is displayed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a digital copying machine according to the present invention will be described. An overview of the digital copying machine of this embodiment, a scanner, an operation unit, a system control device, an image memory unit,
The printer and the specific operation will be described in detail with reference to the drawings.

First, an overview of a digital copying machine according to the present embodiment will be described with reference to FIGS. 1, 2, 3, and 4. FIG. FIG. 1 shows the configuration of a digital copying machine according to the present embodiment, which is roughly divided into a scanner 10 for reading image data from a document and a printer 2 for recording the read image data on recording paper.
00, an image memory unit 300 that stores image data read by the scanner 10, an operation unit 400, and a system control device 500 that controls the entire copying machine and instructs reading and writing of image data of a document. Have been. The operation unit 400 is incorporated in the scanner 10, and includes the printer 200 and the image memory unit 30.
0 and the system controller 500 form the digital copier main body 20.

As shown in the schematic diagram of FIG. 2, the scanner 10 transports an original on a contact glass 108 with the center as a reference, reads the original surface with a CCD (Charge Transfer Device) 101, and converts the analog signal into a digital signal. (Hereinafter, this digital signal is referred to as image data.) The original conveyance drive uses a servo motor to change the conveyance speed in accordance with the magnification, thereby performing magnification in the vertical direction (sub-scanning direction).

The image memory unit 300 has a scanner 10
Is input via the coaxial cable 700. The image memory unit 300 is paired with a memory controller and a memory, which will be described later, and has a capacity of 64 1 Mbit DRAMs, and an image capacity corresponding to four A2 size documents.

The printer 200 basically has the same process (the drum rotation, transport, fixing, and separation steps) as the analog copying machine, or the writing unit is unique to the digital machine.
In this apparatus, two semiconductor lasers (LDs) 204 are used, and an electrostatic latent image is formed on the photoconductor drum 213 by irradiating the photoconductor drum 213 (see FIG. 3) with laser light, and development is performed.

The operation unit 400 includes an operation control device 401 and an operation panel 402. Although details will be described later, FIG. 4 shows a plan view of the operation panel 402.

In this machine, a scanner 10 and a printer 20
0 is an independent and separate device, the system controller 500, as shown in FIG.
The printer control circuit 201 and the operation control device 401 exchange information with each other, and the system control device 50
Send instructions to each from 0. In addition, the image memory unit 300 issues an instruction to write or read image data.

FIG. 5 is a state transition diagram of software executed by the system control device 500. First, when the power of the scanner 10 is turned on, the power of the digital copier main body 20 is also turned on in conjunction with the scanner 10. Next, initialization (initialization setting) is performed, where the contents of the RAM are cleared, the mode setting of each peripheral element, the initial setting in each flag, and the like are executed. When the initialization is completed, the digital copying machine enters a wait state, and the program waits in a loop until the feasible temperature and the rotation speed of the polygon motor reach the specified values.

When they start up, the system controller 500 issues a ready state instruction to the scanner control circuit 10.
0, output to the printer control circuit 201 and the operation control device 401, and the digital copying machine is ready for copying and is in a state of waiting for document insertion.

Next, copying is started when a document is inserted. If an error occurs during the wait, ready, or copy state, the mode shifts to an error processing mode. weight,
In the case of transition from the ready state to the error processing, the processing returns to the wait state after the error processing. In the case of the transition from the copy state to the error processing, the processing proceeds to the recovery mode after the error processing, and then enters the wait state. Return.

In the SP mode, when a serviceman call occurs, the serviceman looks at the contents of the system in more detail. , Cumulative usage, number of misfeeds, etc. This SP mode
It can be called from any of the wait, ready, and copy states, and returns to the wait or ready state after completion.

The user program mode allows the user to enter any of various modes during the ready state. The various modes include the total number of sheets fed, the fixed scaling ratio setting, the date and time setting, and the display. After completion, the mode returns to the wait or ready state.

Next, the configuration of the scanner 10 will be described. In FIG. 2, when the operator inserts a document into the entrance roller 107, first, the size detection central sensor S1 (see FIG. 7) is turned off.
N. Next, the pinch solenoid (not shown) is turned on,
The pressure of the driven roller of the entrance roller 107 is released, and the document can be inserted further into the back. At this time, fluorescent light 1
10 lights up, and preparation for document reading is started. Each roller for transporting the original is directly driven by a transport motor via a timing belt.
The rotation is transmitted to 7 via an electromagnetic MC.

In reading a document, the document is first conveyed in the sub-scanning direction between the contact glass 108 and the reflecting plate 109 according to the rotation of the roller 107, and during this conveyance, the light from the fluorescent lamp 110 is used in the main scanning direction. The original surface is scanned. The reflected light forms an image on the CCD 101 via the lens 111, and the original image is read.

As shown in FIG. 1, the original image formed on the CCD 101 is passed from the CCD 101 to the image amplifying circuit 102 in synchronization with the clock generated by the synchronization control circuit 106, and is amplified by the image amplifying circuit 102. Then, the analog signal is converted into a digital signal by the A / D conversion circuit 103, and the noise of the image, the unevenness of the light amount, the contamination of the contact glass 108,
The distortion of the digital signal due to the sensitivity unevenness of D101 or the like is corrected. Thereafter, the image data is converted into digital recording image information (image data) by the image processing
Output to

Operation Unit FIG. 6 is a block diagram of the operation control unit 401. The operation control device 401 includes a serial communication controller 403,
CPU 404, clock element 405, RAM 406, ROM
407, DIP switch 408, VRAM 409, CG
It comprises a ROM 410, an I / O interface 411, and an LCD control element 412.

As shown in FIG. 4, the operation panel 402 includes a mode clear key 415, an interrupt key 416, a stop key 417, a start key 418, and a numerical input key 4
19, various function keys, a voice synthesis IC and a speaker 420, an LCD (liquid crystal display screen) 413, a touch panel 414, and the like.

The CPU 404 stores information necessary for control in accordance with a control program described in the ROM 407 into the RA.
The whole is controlled while reading from and writing to M406. FIG. 7 shows C
10 shows a control flowchart of the PU 404, and shows the control flow of the CPU 404.
The main control contents are the initialization of the contents of the VRAM 409 and the RAM 406 (S101), the I / O interface 411
Key input from various input keys on the operation panel 402 (S103, S104), or the DIP switch 4
08, the input information is determined, and the command information is transmitted via the serial communication controller 403 (S105).
The command information sent from 0 is determined (S10).
2) Based on the command information, the LCD screen display pattern is read from the CGROM 410 and written into the VRAM 409 for LCD screen display, and the LCD control element 412
(S111, S11)
2).

On the other hand, the LCD control element 412
The LCD screen display pattern written in the VRAM 409 is displayed on the LCD 413 in response to the control signal from the controller 04 (S113).

The clock element 405 counts time according to a control signal from the CPU 404, and functions as a timer function for outputting a count result to the CPU 404 and a calendar function for counting date and time.

The voice synthesis IC and the speaker 420
When audio data and a control signal are received from the PU 404 via the I / O interface 411, the audio or sound is synthesized and output by a speaker. For example, when audio data and a control signal for error processing are received (S109), a buzzer sound is output (S110).

On the screen of the LCD 413 on the operation panel 402, numerical values input from respective function input keys such as copy number, repeat number, original set number, recording paper size designation, copy density adjustment, magnification, and numerical value input keys are displayed. , An interrupt mode, a reservation input mode, an error message, and other various copy processing conditions, modes, and messages are displayed.

A touch panel key 414 is used for setting a mode and inputting copy processing conditions. When the touch panel key 414 is pressed (S106), the CPU 404 calculates the pressed position input via the I / O interface 411, compares the pattern with the pattern on the VRAM 409, and determines the command information (S107, S108). , RA
M406 and control to display a screen corresponding to the command information on the LCD 413 (S1).
11, S112, S113).

A numerical input key 419 is used to input numerical values of copy processing conditions. When numeric input key 419 is pressed,
The CPU 404 stores the numerical information input via the I / O interface 411 in the RAM 406,
Control is performed so that the input numerical value is displayed on the LDC 413 on the screen corresponding to the numerical information.

The interrupt key 416 is used when performing an interrupt operation process. When the interrupt key 416 is pressed, the CP
U404 stores the interruption-time copy processing conditions in an area other than the normal copy processing condition storage area of the RAM 406, and transmits an interrupt signal to the system control device 500. When the interrupt is released, the remaining copy processing conditions stored in the RAM 406 are retransmitted to the system control device 500.

When the stop key 417 is pressed,
The CPU 404 sends and transmits a copy operation stop signal. When the start key 418 is pressed, the CPU 404
6 is stored in the system controller 500.
Send to When the mode clear key 415 is pressed, C
The PU 404 deletes the command information stored in the RAM 406. The CPU 404 receives the copy end information and the error information sent from the system control device 500 via the serial communication controller 403, and
Control is performed so as to output to D413 or voice synthesis IC and speaker 420.

System Controller The system controller 500 controls the entire digital copying machine system. FIG. 8 shows the configuration of the system control device 500, with the CPU 501 as the main component.
ROM 502, RAM 503, clock signal generation circuit 5
04, timer 505, and interrupt controller 50
6, an I / O interface 507 for performing data communication with the image memory unit 300 (a memory controller 303 described later), a scanner control circuit 100, a printer control circuit 201, and an operation control device 40.
1 is provided with serial communication controllers 508, 509, and 510 for performing data communication with the communication device 1. FIG. 9 is an explanatory diagram showing the relationship between the system control device 500 and the scanner control circuit 100, the printer control circuit 201, the memory controller 303, and the operation control device 401.

FIG. 10 shows the configuration of the image memory unit 300. The image memory unit 300 includes a scanner I / F 301 and a memory 30.
2a, memory controller 303a, memory 302b,
It comprises a memory controller 303b, a memory 302c, a memory controller 303c, a memory 302d, a memory controller 303d, a compression / decompression controller 304, and a printer I / F 305. The memory 302a
(Or b, c, d) and the memory controller 303a
(Or b, c, d) form a pair, and each memory + memory controller forms one memory block.

The N-line output (VD1) sent from the scanner control circuit 100 via the coaxial cable and N +
The one-line output (VD2) is sent to the memory block via the scanner I / F 301. Memory 302a, 3
02b, 302c, and 302d are each 1 Mbit D
64 RAMs (dynamic rams) are mounted, and the total memory capacity is 32 Mbytes according to the following equation. 1 Mbit × 64 × 4 block = 256 Mbit 256 Mbit ÷ 8 bit = 32 Mbyte Further, a write instruction or a read instruction to each memory is sent from the system control device 500.

Memory 302a, 302b, 302c, 3
In the case of 02d, the address is determined by 1 bit each.
As shown in FIG. 1A, the main scanning direction is 9792 bits,
The sub-scanning direction is 6853 bits. This memory has a storage capacity equivalent to the A2 size, and one block of the memory corresponds to one page of the A2 size document. Therefore, the memories 302a, 302b, 302c, 302d
The total memory capacity of the four blocks corresponds to four pages of A2 size as shown in FIG.

The memory 302a (or 302b, 30
2c, 302d) is stored in the memory controller 303a (or 303b, 303c, 303).
The image is edited in d) and sent to the printer I / F 305 or the compression / expansion controller 304. The image data sent to the printer I / F 305 is transferred to the printer control circuit 201 and is transferred by the printer 200 to recording paper. On the other hand, when the image data sent to the compression / expansion controller 304 is subjected to the compression processing, the image data is stored in a predetermined memory (the preset memories 302a, 302b, and 3).
02c, 302d) and is stored in the restart storage area. When the decompression process is performed, the data is sent to a predetermined memory, stored, read, and transmitted to the printer 2 via the printer I / F 305.
00 is transferred to recording paper.

Next, the configuration of the printer 200 will be described with reference to FIGS. The image data read from the image memory unit 300 is received by the line driver circuit 202 and amplified by the laser driver circuit 203. Here, the image data is a 1-bit (record / non-record) binary signal per pixel. Laser driver circuit 203
Is synchronized with a synchronization signal of the read synchronization control circuit 205, and based on the binarized signal, an LD (laser diode) 204
To emit light. In addition, the printer control circuit 201
The following control is performed by driving the driving device 206.

The laser beam emitted from the LD 204 is reflected by the rotating polygon mirror 207 shown in FIG. 3, passes through the polygon mirror for correcting the tilt of the polygon mirror, and passes through the f-θ lens 109.
, And is reflected by the first mirror 210, the second mirror 211, and the third mirror 212,
Is irradiated with an image. The rotating polygon mirror 207 is fixed to a polygon mirror driving motor 214 by a rotating shaft. The polygon mirror drive motor 214 rotates at a constant speed, and drives the rotary polygon mirror 207 to rotate at a constant speed. By the rotation of the rotary polygon mirror 207, the above-described laser light is scanned in a direction perpendicular to the rotation direction of the photosensitive drum 213, that is, in a direction along the drum axis.

The surface of the photosensitive drum 213 is uniformly charged by a charger connected to a high voltage generator of negative voltage. When the laser beam emitted based on the image data irradiates the uniformly charged surface of the photoconductor drum 213, the charge on the photoconductor surface flows to the equipment ground of the main body of the photoconductor drum 213 due to a photoconductive phenomenon. Disappear. Here, the light portion of the document density (the binarized signal is at the non-recording level) is LD2.
04 is not turned on, and the portion where the document density is high (2
The LD 204 lights up when the value signal is the recording level.

As a result, on the surface of the photosensitive drum 213, the potential at the position corresponding to the portion where the document density is low becomes -7.
It becomes 50V, and the potential at the position corresponding to the dark portion of the document becomes about -100V. That is, an electrostatic latent image corresponding to the density of the document is formed.

The electrostatic latent image is developed by the developing unit 215 to form a toner image on the surface of the photosensitive drum 213. The toner in the developing unit 215 is negatively charged by stirring, and the developing unit 215 is biased to about -550 V by a developing bias generator. Therefore, the toner adheres to a place where the surface potential of the photosensitive drum 213 is higher than the developing bias, and a toner image corresponding to the original image is formed.

Photosensitive drum 213 on which toner image is formed
The surface further rotates and moves to the position of the transfer unit 220. Subsequently, the leading end of the sheet and the leading end of the image are transferred to the transfer unit 220.
The toner image is transferred onto the recording paper sent from the paper feed tray 216 at the timing that coincides with the position of. Thereafter, the recording paper is sent to the fixing unit 221, where the toner is fused by heat and pressure, and is discharged to the discharge tray 222 as a copy.

On the other hand, the recording paper has three paper feed trays 216.
Is fed out by the feeding operation of the feed roller 217, cut into an appropriate size by the cutter 218, is registered by the registration roller 219, and is transferred to the lower transfer position of the photosensitive drum 213 at a predetermined timing. Conveyed. The digital copying machine according to the present embodiment is a wide copying machine capable of performing a long copy from A4 size to A1 size and further up to a length of 5 m. (A4 width or more) is placed.

Specific Operation In the above configuration, when the system controller 500 is ready to read a document, the system controller 500 executes display processing for each size / variable magnification shown in the flowchart of FIG.
First, the system control device 500 includes the image memory unit 300
The memory 302a, 302b, 302c, 302d is checked to determine whether there is a writable page memory (S201).

If the number of writable page memories> 0,
The maximum document size that can be read at the same magnification (variable magnification: 100%) is calculated from the memory capacity (S202), and the readable number of sheets for each size / reading magnification (variable magnification) is calculated from the maximum document size. (S203). At this time,
The set magnification is used as one of the reading magnifications.

Next, if the maximum original size is not smaller than the A4 size (S204), and if the number of sheets for each size is greater than 0 (S205), reading is performed for each size / reading magnification (variable magnification). A command for displaying the number of divided sheets for each size in which the number of sheets is set and a maximum original size command are sent (S2
06), a command for turning on the insertable display is sent to the scanner 10 (S207).

On the other hand, if it is determined in step S201 that the number of writable page memories is not> 0, that is, the image memory unit 30
If there is no writable memory at 0, the operation unit 40
0, a display command indicating that a copy operation is disabled is sent (S20).
8), a command to turn off the insertable display is sent to the scanner 10, and the process is terminated (S209).

When the maximum document size is smaller than the A4 size, or when the number of sheets of all sizes is not larger than 0, a display command indicating that copy operation is not possible is sent to the operation unit 400 (S208). And a command to turn off the insertable display is sent to the terminal (S20).
9).

FIGS. 13A and 13B show the LCD 413 of the operation panel 402 by executing the above flowchart.
The upper screen is displayed, and the number of readable sheets by document size / reading magnification (variable magnification) is displayed. Also,
The maximum readable document size at the set magnification (the set reading magnification) is indicated by an arrow, and the number of readable documents for each document size at the set magnification is highlighted (dots in the figure).

For example, the screen display of FIG. 13A shows a case where the set magnification is 100%, the remaining memory amount is 2, the maximum original size at the set magnification of 100% is A1, and the set magnification is 10
It can be confirmed that the number of readable sheets for each size at 0% is 1 for A1 size, 2 for A2 size, 4 for A3 size, and 8 for A4 size.

The screen display in FIG. 13B shows the case where the set magnification is 71%, the remaining memory amount is 2, the maximum original size at the set magnification 71% is A0, and the set magnification is 71%. The number of sheets that can be read for each size is one for A0 size, A
2 for 1 size, 4 for A2 size, 8 for A3 size
It can be confirmed that there are 16 sheets in A4 size.

As shown in the figure, on the screen on the LCD 413, the number of readable sheets for each document size other than the set magnification is displayed. This display is a guide when the operator changes the set magnification and executes the copy operation.

By displaying such a screen, the operator can determine whether or not the document to be used for copying can be stored in the image memory unit 300. In other words, it is possible to know whether or not a document to be used for copying from now on will cause memory over and cause image loss, thereby preventing erroneous copying.

Further, by comparing the number of originals to be copied with the number of readable originals by size / reading magnification, it is possible to use the memory efficiently.

In the above-described embodiment, the number of readable sheets is calculated and displayed based on the document size. However, the number of readable sheets is calculated and displayed using the image size instead of the document size. The same effect can be obtained. In this case, the maximum image size is calculated in S212 as shown in the flowchart of FIG.
In step S213, the maximum image size is processed for each size.
In step 16, a command for displaying the number of divided sheets for each image size and a maximum image size command are sent.

In place of the screen display of FIG.
As shown in FIG. 15A, a method of displaying a set magnification and the maximum document size that can be read at the set magnification, and FIG.
As shown in (b), the method of displaying the set magnification and the number of originals readable at the set magnification by the size also causes the original to be used for copying to be overwritten, resulting in image loss. Can be known, and miscopying can be prevented.

[0063]

As described above, in the digital copying machine of the present invention, the image reading means for scanning the original and reading the image data, the memory means for storing the read image data, and the memory means are stored in the memory means. In a digital copying machine having image recording means for reading out image data and recording it on recording paper, and operation display means for inputting or displaying information necessary for a copying operation, before starting reading of an original by the image reading means In addition, the remaining memory amount of the memory means, and
Based on the reading magnification set via the operation display means,
Since the control unit for obtaining the maximum readable document size and displaying the reading magnification and the maximum document size via the operation display unit is provided, the operator determines in advance whether all the image data of the document can be stored in the memory. Therefore, it is possible to reliably prevent loss of image data when image data is read and stored in the memory. The same effect can be obtained when an image size is displayed instead of the document size.

Further, the digital copying machine of the present invention reads out image data by scanning an original, a memory for storing the read image data, and reads out the image data stored in the memory. In a digital copier equipped with an image recording means for recording on recording paper and an operation display means for inputting or displaying information necessary for a copying operation, before starting reading of an original by the image reading means, a memory means is provided. The control means for obtaining the number of readable originals for each reading magnification for each reading magnification based on the remaining memory amount and displaying the number of readable originals for each reading magnification via the operation display means is provided. Can determine in advance whether all the image data of the original can be stored in the memory, read the image data and store it in the memory Loss of image data multiplexer Ru can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating a configuration of a digital copying machine according to an embodiment.

FIG. 2 is a schematic configuration diagram of a scanner.

FIG. 3 is a schematic configuration diagram of a printer.

FIG. 4 is a plan view of an operation panel.

FIG. 5 is a state transition diagram of software executed by the system control device.

FIG. 6 is an explanatory diagram showing a block diagram of an operation control device.

FIG. 7 is a control flowchart of a CPU of the operation control device.

FIG. 8 is an explanatory diagram illustrating a configuration of a system control device.

FIG. 9 is an explanatory diagram showing a relationship between a system control device, a scanner control circuit, a printer control circuit, a memory controller, and an operation control device.

FIG. 10 is an explanatory diagram illustrating a configuration of an image memory unit.

FIG. 11 is an explanatory diagram showing a configuration of a memory.

FIG. 12 is a flowchart of a display process for each size / variable magnification according to the present embodiment.

FIG. 13 is an explanatory diagram showing a screen displayed on the LCD of the operation panel by a display process for each size / variable magnification.

FIG. 14 is a flowchart of a display process for each size / variable magnification according to another embodiment.

FIG. 15 is an explanatory diagram showing another display example of a screen displayed on the LCD of the operation panel.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Scanner 20 Digital copier main body 100 Scanner control circuit 200 Printer 201 Printer control circuit 300 Image memory unit 400 Operation unit 401 Operation control device 402 Operation panel 413 L
CD 414 Touch panel 500 System controller

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Morihiko Okimoto 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Company (72) Inventor Takanari Saito 1-3-6 Nakamagome, Ota-ku, Tokyo Ricoh Co., Ltd. (72) Hideo Aizawa, Inventor 1-3-6 Nakamagome, Ota-ku, Tokyo Kazuyuki Nakahara, Inventor Kazuyuki Nakahara 1-3-6, Nakamagome, Ota-ku, Tokyo (56) References JP-A-2-72763 (JP, A) JP-A-2-145858 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 1 / 21 G03G 15/00 104 H04N 1/00 H04N 1/00 106 H04N 1/393

Claims (2)

(57) [Claims] 1. An image reading means for scanning a document to read image data, a memory means for storing the read image data, and an image recording means for reading out the image data stored in the memory means and recording it on a recording paper Means, and an operation display means for inputting or displaying information necessary for a copying operation, the remaining memory amount of said memory means, and Control means for determining the maximum readable document size based on the reading magnification set via the operation display means, and displaying the reading magnification and the maximum document size via the operation display means. Digital copier featured. 2. An image reading means for reading an image data by scanning a document, a memory means for storing the read image data, and an image recording means for reading out the image data stored in the memory means and recording it on a recording paper Means and an operation display means for inputting or displaying information necessary for a copying operation, a digital copier based on a remaining memory amount of the memory means before the image reading means starts reading a document. Control means for determining the number of readable originals by size for each reading magnification, and displaying the number of readable originals by size for each reading magnification via the operation display means. Digital copier.