JPS6353566A - Copying device - Google Patents

Abstract

PURPOSE:To obtain a copying device which produces no miscopy, by causing a recording density and selection information to be read out from a storage means and setting the manual or automatic density mode in accordance with the read-out selection information when a calling is instructed. CONSTITUTION:When a writing is instructed while the manual density mode is set, the recording density being set and the selection information for designating the manual density mode are written in a storage means 53. When a calling is instructed, the recording density and selection information are read out from the storage means 53. If the read-out selection information designates the manual density mode, the manual density mode is set with the read-out recording density. Therefore, when the operator of this copying device manual adjusts a density in order to obtain a special copy and inputs a writing instruction in a state where the manually adjusted density is set, a similar copy can be produced only by instructing the calling of the density. Therefore, it becomes unnecessary to read just the density by producing a new test copy and production of a miscopy due to the wrong memory of the operator can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION 1. Field of the Invention The present invention relates to a copying apparatus, and more particularly to a copying apparatus capable of storing and recalling operating modes.

■Conventional technology In recent years, the functions of copying machines have been enhanced, and various copy modes (
copy conditions) can be set. Additionally, it is equipped with multiple paper feed trays and uses a removable paper feed cassette so that several types of recording paper of different sizes can be loaded at any time.

Although these functions have become more multifunctional, the operator's operations have also become more complicated, resulting in the inconvenience of having to operate many operation key switches to set the required operation mode each time a copy is to be made.

Therefore, a copying apparatus has been proposed that is equipped with a storage device that stores (data related to) a copy mode and that can be called up by a simple key switch operation.

In this case, if frequently used copy modes are stored in the storage device of the copying apparatus, setting the copy mode becomes easy.

As described above, this type of conventional copying apparatus is equipped with a storage device for the purpose of storing frequently used copy modes, so that data regarding copy density, which is not universal, is not stored. In other words.

Since the white skin density and image density differ for each document, it is desirable to set the copy density each time, so when the memory copy mode is called up, the standard density or automatic density adjustment is set for copying machines with an automatic density adjustment device. It was to set the density mode.

However, contrary to this intention, operators sometimes use it to memorize copy modes that are very special and require many key operations to set, even if they are used infrequently. .

If this special mode includes copy density,
Conventional copying machines do not store modes, even though they have the ability to store and recall modes.

The operator cannot remember the copy density set in that mode forever, so the next time the operator makes a similar copy, the operator may make a mistake due to a memory error, or make several new test copies. There was an inconvenience in having to do so.

Object of the Invention The object of the present invention is to provide a copying apparatus that makes as few test copies as possible and eliminates copy errors even when making special copies.

■Structure of the Invention In order to achieve the above object, in the present invention, a copying apparatus having a manual density mode and an automatic density mode is provided with a storage means, and when the manual density mode is set, a writing instruction is issued. , the recording density being set and the selection information specifying the manual density mode are written into the storage means; if there is a writing instruction while the automatic density mode is set, the selection information specifying the automatic density mode is written. Write in the storage means; When a recall instruction is given, the recording density and selection information are read from the storage means, and when the readout selection information is selection information specifying manual density mode, the manual density mode is set at the readout recording density. set; when the readout selection information is selection information specifying automatic density mode,
Set automatic density mode: Set as configuration.

According to this, for example, if an operator manually adjusts the density to obtain a special copy, if the operator inputs a writing instruction with this setting, the recording density at that time will be memorized, and the same operation will be performed next time. If you want to make a copy,
All you have to do is instruct the call. Therefore, it is possible to avoid making a test copy and readjusting the density, or to avoid copying errors due to an operator's memory error. Furthermore, key operations are simplified because only the key operations related to recall need be performed.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

FIG. 1 shows an outline of the mechanism of a copying apparatus according to an embodiment of the present invention. This will be explained with reference to FIG.

1 is the contact glass on which the original is placed.

2 is an automatic document feeder i1 (hereinafter referred to as an ADF device) which also serves as a pressure plate.

The original may be set directly on the contact glass 1 with the pressure plate 2 opened, or may be set on the original u and stand of the ADF device 2 (on the right side of the ADF device 2 in FIG. 1). In the latter case, when the ADF device 2 detects that there is a document on the document placement table, the copy start instruction input becomes an ADF start instruction, and the ADF device 2 feeds the document into the contact glass 1.
After setting it at a predetermined position, the ADF device 2 issues a copy start instruction. The operation mode of this ADF device 2 is as follows:
There are two ways. The first is ADF mode where copy start instruction is input → document is placed on the document tray → copying → the original is ejected and the next document is loaded → etc. until all the originals are left on the document tray. The second is a 5ADF mode in which inputting a copy start instruction → loading the original on the document table → copying → discharging the original → waiting for the input of the copy start instruction.

In both cases, when the original is set directly on the contact glass 1 and when the ADF device is used, the original is pressed down by a white belt stretched across the contact surface of the ADF device 2 with the contact glass 1. It is brought into close contact with the contact glass 1.

Below the contact glass 1, an exposure lamp 3, a first mirror 4. An optical scanning system including a second mirror 5, a third mirror 6, a condensing lens 7, a fourth mirror 8, etc. is provided. Light reflected from the original by exposure lamp 3 is guided to photoreceptor drum 9 by this optical system. The copying apparatus of this embodiment is of a document fixed type, and includes a first carriage (not shown) equipped with an exposure lamp 3, a first mirror 4, etc.;
A second carriage (not shown) carrying a second mirror 5, a third mirror 6, etc. is driven at a speed ratio of 2:1, and the original is scanned while keeping the optical path length constant. This document scanning is performed by a photosensitive drum 9 rotating at a constant speed.
(clockwise in FIG. 1) and in the case of a 1-size copy, the moving speed of the surface of the photosensitive drum 9 rωCam/
sec] (r: radius [cm] of photoreceptor drum 9, ω: rotational angular velocity of photoreceptor drum 9 [rad/5ack).

The document scanning speed v [crn/sec] is set to be equal. For enlarged copies, set the enlargement rate to M.
Then, the condensing lens 7 moves to the left on the optical axis in FIG. 1 and magnifies the projected image on the photosensitive drum 9 by M times, so the document scanning speed v [em/sec] is The moving speed of the surface of the body drum 9 is set to 1/M of rω [cm/see:1. In the case of reduced copying, if the reduction ratio is 1/m, the condenser lens 7 moves to the right on the optical axis in FIG. 1 to reduce the projected image on the photosensitive drum 9 to 1/m. Therefore, the document scanning speed VCcm/sec] is equal to the moving speed rω[cm/5eal of the surface of the photosensitive drum 9].
set to double.

Around the photoreceptor drum 9 are a charger 10° and a developing unit 11. Transfer charger 129 Separation charger 13
．． A cleaning unit 14 and the like are arranged.

There are a total of 5 paper feed trays, from the top: the 1st paper feed tray, the 2nd paper feed tray.
They are called a tiered paper feeding tray, a 3rd tier paper feeding tray, a 4th tier paper feeding tray, and a 5th tier paper feeding tray. A removable paper feed cassette 15.18, 21.degree. 24.27 is attached to each paper feed tray.

This copying apparatus can feed up to A3 size recording paper in the longitudinal direction (hereinafter referred to as "horizontal feeding"; on the other hand, paper feeding in the transverse direction is referred to as "vertical feeding"). Therefore, for A3 horizontal feeding, for A4 vertical feeding, for A4 horizontal feeding, for A5 vertical feeding, for A5 horizontal feeding, for B4 horizontal feeding, for B5 vertical feeding, for BS horizontal feeding, Eleven types of paper feed cassettes are available: B6 vertical paper feed, B6 horizontal paper feed, and universal paper feed (free size). These paper feed cassettes are equipped with a detection mark indicating the type (size of paper accommodated), and is read by a paper size detection sensor (57) provided on each paper feed table when the cassette is installed. Specifically, the size detection sensor (57) is a photointerrupter, and when a cassette is attached, a light-shielding filler of a detection mark enters and reads the type of paper feed cassette attached by light transmission/light-shielding (in addition to this, There is also a method of using a magnet as the detection mark and reading it by turning on/off a magnetically sensitive reed switch). The detection mark codes are shown in Table 1 below.

However, in Table 1, "0" indicates light transmission (no light blocking filler), and "1" indicates light blocking (with light blocking filler).

Table 1 When the first stage paper feed tray is selected, the recording paper stored in the paper feed cassette 15 is fed out toward the registration rollers 30 by the paper feed rollers 16 and feed rollers 17.
When the second stage paper feed tray is selected, the recording paper stored in the paper feed cassette 18 is fed out toward the registration rollers 30 by the paper feed rollers 19 and feed rollers 20.
When the third stage paper feed tray is selected, the recording paper stored in the paper feed cassette 21 is fed out toward the registration rollers 30 by the paper feed rollers 22 and feed rollers 23.48, and the recording paper is fed to the fourth stage paper feed tray. When is selected, the recording paper stored in the paper feed cassette 24 is fed out toward the registration roller 30 by the paper feed roller 25 and feed rollers 26, 47° 48, and the fifth stage paper feed table is selected. and paper feed roller 28 and feed rollers 29, 45, 46, 47
, 48 feed the recording paper stored in the paper feed cassette 27 toward the registration rollers 30.

The registration roller 30 feeds the recording paper fed out at a predetermined timing to the photosensitive drum 9 (sheet feeding).

On the downstream side of the photosensitive drum 9, a conveyor belt 31. A fixing unit 32 and the like are provided.

The conveyance path of the recording paper after leaving the fixing unit is divided into two paths. One is a paper discharge conveyance path that discharges paper to a paper discharge tray 35 via a paper discharge roller 34 when the switching claw 33 is lowered (the state shown in FIG. 1), and the other is a This is a paper refeed conveyance path that leads to the intermediate tray 36 via feed rollers 39 and 40 when the switching claw 33 is raised (rotated in the direction of the arrow in FIG. 1).

In the double-sided copy mode, when copying the front side, a switching solenoid (not shown) is energized, a switching pawl is rotated, the paper refeeding path is selected, and the recording paper is placed in the intermediate tray 36 with the copy side facing up. Save up. From the paper refeed transport path to intermediate tray 3
The recording paper stored in 6 (with a copy on the front side) is
The right-aligning roller 37, which rotates in the direction of the arrow, moves the intermediate tray 36 to the right side in FIG.
2, 43, 44, and 48, it is fed out toward the registration rollers 30. Thereafter, the registration roller 30 sends this recording paper to the photosensitive drum 9 at a predetermined timing, but at this time, the side with the copy is facing down and the back side is the transfer surface.

The intermediate tray 36 has an opening/closing lid on the left side in FIG. 1, and when double-sided copying is to be canceled, the recording paper that has been copied on the front side can be taken out from here.

An overview of the copy process will be explained. The copy process can be divided into a start cycle, a copy cycle and an end cycle.

After operating the operation board and inputting predetermined copy conditions, the operator sets the document and inputs a copy start instruction.

When using the ADF device 2, this instruction becomes an ADF start instruction, and after the ADF device W12 loads the document on the document table and sets it at a predetermined position on the contact glass 1, it issues a copy start instruction.

In response to a copy start instruction, a start cycle is first executed. The start cycle is performed for the purpose of stabilizing the mechanical drive system and unifying the initial exposure conditions. A drive source such as a main motor is energized, and then the photoconductor drum 9 is rotated and the photoconductor surface is rotated. cleaning is performed. At this time, the grounded conductive brush and cleaning blade provided in the cleaning unit 14 wipe away toner, carrier, etc. that have adhered while the apparatus is stopped, and the static electricity is further removed by a static elimination lamp (not shown).

Upon completion of cleaning and neutralization of the photosensitive surface (end of start cycle), a copy cycle is executed.

In this case, charging of the photosensitive surface → electrostatic latent image formation → cursed image →
Transfer is performed in the order of fixing. First, charger 1
0, the photosensitive surface of the photosensitive drum 3 is uniformly charged to a high positive potential, and an eraser (not shown) erases unnecessary areas according to the paper size.

The optical system is energized at a predetermined timing and the exposure lamp 3 is activated so that the exposure of the leading edge of the document matches the leading edge erase end position.
The original is irradiated by the scanner, and the original is scanned by the first and second carriages.

The reflected light of the original is transmitted to the first mirror 4. 2nd mirror 5 and 3rd mirror
When reflected by the mirror 6 and condensed by the lens 7, it is reflected by the fourth mirror 8 and formed into an image on the photosensitive surface of the photosensitive drum 9.

When the photosensitive surface of the photosensitive drum 9, which is uniformly charged to a high positive potential, is irradiated with reflected light from the original, the surface charge is removed according to the strength of the reflected light from the original due to the photoelectric groove phenomenon, and static electricity is generated. A latent image is formed.

Since this electrostatic latent image is formed negatively, the developing device 1
1, negatively charged toner adheres and becomes visible (
Developed: positive image).

Before starting exposure, each paper feed cassette 15, 18, 21°24
．． The recording paper fed out from 27 or the intermediate tray 36 to the registration rollers 30 is stopped once in contact with the registration rollers 30, and is directed toward the photoreceptor drum 9 at a predetermined timing according to the rotation of the photoreceptor drum 9. will be sent.

When the recording paper passes directly above the transfer charger 12 to which a predetermined voltage is applied, it comes into contact with the toner image formed on the photosensitive surface of the photosensitive drum 9, and the toner image is transferred.

That is, the registration roller 30 maintains a delivery speed vp [cm/s] equal to the moving speed rω[cm/5acl of the surface of the photoreceptor drum 9 so that the toner image and the recording paper are exactly aligned.
ec] to feed the recording paper.

After the toner image has been transferred, the photosensitive surface passes through the cleaning unit 14 and is cleaned and neutralized to remove residual toner and carrier in the same manner as described above.

The recording paper onto which the toner image has been transferred is separated from the photosensitive surface of the photosensitive drum 9 by a separation charger 13 and a separation claw (not shown), and then transferred to a fixing unit 32 by a conveyor belt 31.
sent to. The fixing unit 32 is a pair of rollers with a built-in heater, and the toner image on the recording paper is fixed here.

Here, for copying in single-sided copy mode (outside double-sided copy mode) or back-side copying in double-sided copy mode, a switching drive solenoid (not shown) for the switching pawl 33 is used.
Since the switching claw 33 is not energized, the switching claw 33 is lowered, and the recording paper that has left the fixing unit 32 is transferred to the paper ejection roller 34.
The paper is ejected to the paper ejection tray 35 via. When copying the front side in double-sided copy mode, the switching drive solenoid of the switching pawl 33 is energized, so the switching pawl 33 rotates in the direction of the arrow and moves upward, causing the fixing unit 32 to move upward. The output recording paper is guided to the intermediate tray 36 via feed rollers 39 and 40.

After repeating the above copy cycle for the set number of sheets, in the end cycle, the photosensitive drum 9 is further
Rotates to clean and neutralize the photosensitive surface. This end cycle is performed to maintain stability and protect the photosensitive surface of the photosensitive drum 9, so the processing content is the same as the start cycle, and if a copy start instruction is given while the end cycle is being executed, the start cycle is omitted. and execute from the copy cycle.

FIG. 2 is a block diagram schematically showing the control system of the copying apparatus shown in FIG. 1. This will be explained with reference to FIG.

In Fig. 2, overline indicates that the terminal is L active (overline is omitted in the explanation), and Vcc indicates a constant voltage or a terminal to which constant voltage Vcc is applied. There is.

This control system consists of a main microcomputer (hereinafter referred to as MCPU) 50 and three sub-microcomputers (hereinafter referred to as 5 ICPU, 52 CPU, 53 CPU).
It is mainly composed of.

The MCPU 50 centrally controls this control system, and its pass line includes a read-only memory (ROM).
52, read/write memory (RAM) 53, I10 device 56, 5 IC CPU 62, etc. are connected. Decoder 51 and latch circuit 61 are bus drivers.

The ROM 52 mainly stores control programs necessary for controlling the copying apparatus.

In the RAM 53, each processing parameter (copy condition) necessary for each copy process is sequentially written and read out as necessary.In addition, this RAM 53 has a non-volatile memory area backed up by a battery, A plurality of sets of copy conditions are stored therein in association with numbers.

54 is a battery backup circuit for backing up the RAM 53, and 55 is a power supply voltage monitoring circuit. The power supply monitoring circuit 55 receives a reset signal (
L level) and constant voltage Vcc (e.g. +5v)
When the voltage becomes lower than a predetermined voltage (for example, 4.5V), a reset signal (L level) is generated. This reset signal is
PU50゜5ICPU62S2CPU63,53CPU
.

Engineering/○ device 56 and battery backup circuit 5
It is applied to the reset terminal of No. 4.

When a reset signal is applied to the battery backup circuit 54, the transistors T r 1 and Tr 2 enter the cut-off state. As a result, the voltage of the battery BT is applied to the constant voltage input terminal (Vcc) of the RAM 53 and the chip select input terminal GE. The voltage of battery BT is set lower than the constant voltage Vcc (for example, 3v)
Therefore, writing to RAM53 and R
Reading from AM53 becomes impossible.

When the power supply voltage is unstable, the power supply voltage monitoring circuit 55 may malfunction, so the battery backup circuit 54
A Zener diode ZDI is inserted into the reset input terminal of the . This Zener diode ZD1 prevents the battery backup circuit 54 from malfunctioning due to a reset signal that fluctuates below the Zener potential (for example, 4V).

When the reset signal becomes H level after a predetermined period of time has elapsed after the power is turned on or after the constant voltage V c c is restored, the transistor T r 1 is activated via the Zener diode ZDI.
Since the base current flows through , T r 1 turns on,
As a result, transistor T r 2 is also turned on. Therefore, at the constant voltage input terminal (Vcc) of the RAM 53,
A constant voltage Vcc is applied to the chip select input terminal CE.
Since the L level is applied to , writing to and reading from the RAM 53 becomes possible.

That is, this reset signal prevents the memory contents from being destroyed due to the influence of noise when the power is turned on, which tends to occur in battery-backed memories and the like.

When the L level is applied to the chip select input terminal GE of the RAM 53, the RD and W of the MCPU 50
Writing to and reading from the nonvolatile memory area of the RAM 53 is executed based on the R times signal.

Note that 1 MCPU50 has a built-in A/D conversion circuit,
The voltage of the battery BT of the battery backup circuit 54 input to the analog boat ANO is A/D converted and the voltage is monitored. If the voltage of battery BT is a predetermined voltage (for example, 2
．． 8v: The memory contents of RAM will not be destroyed at this voltage) If the voltage goes below, a warning will be displayed (Bit in Figure 3).If a warning is displayed, turn off the main switch (not shown) and turn off the power. Block, TPl
Connect an auxiliary battery between and TP2 (TPI is on the + side)
After that, replace the battery BT with a new one.

A size detection sensor 57 and its decoder driver 58, a motor and solenoid driver 59, a sensor unit 60, and the like are connected to the I10 device 56.

The decoder driver 58 sequentially sets the reading of the detection mark of the MI paper cassette from the cylindrical and one-pronged paper feed tray to the fifth stage paper feed tray in accordance with the instruction read by the MCPU 50 .

The size detection sensor 57 includes four sets of five photointerrupters for reading the same bits of each paper feed table connected in parallel,
5 for detecting the presence or absence of recording paper on each paper feed tray connected in parallel
It consists of one set of two reflective photosensors. That is, when the decoder driver 58 is set to read the first stage paper feed tray, four photo interrupters for reading each bit are used to detect the detection mark ( (see Table 1) and the presence or absence of recording paper in the paper feed cassette with a reflective photo sensor; if the decoder driver 58 is set to read the second stage paper feed tray, each bit is read. The four photo interrupters read the detection mark on the paper feed cassette mounted on the second stage paper feed table, and the reflective photo sensor reads the presence or absence of recording paper in the paper feed cassette; Detection mark of the paper feed cassette installed on the 3rd stage paper feed tray and the presence or absence of recording paper 2 Detection mark of the paper feed cassette installed on the 4th stage paper feed tray and the presence or absence of recording paper 5 Reads the detection mark on the paper feed cassette installed on the paper feed tray and the presence or absence of recording paper. In this reading, the MCPU 50 determines the size of the recording paper (from the LSB to the third bit) for each paper feed tray.
1), the 4th to 6th bits indicate the paper feed tray number, and the MSB indicates the presence or absence of recording paper. 8-bit size data is written in the size table of the RAM 53 (normal read/write area).

FIG. 4a shows an example of the size data of the second stage paper feed tray in the size table. FIG. 4a shows that a paper feed cassette for A4 horizontal paper feed is attached to the second stage paper feed tray, and there is recording paper.

The motor and solenoid driver 59 includes a main motor, a paper feed motor, and each paper feed roller 16, 19, 22°25.28.
The paper feed clutch solenoid 38, the registration clutch solenoid of the registration roller 30, the switching drive solenoid of the switching pawl 33, etc. are connected, and energization/deenergization control of these is performed in response to instructions from the MCPU 50. The sensor unit 60 is connected to a separation jam sensor, a toner (developing unit 11) sensor, a drum (photosensitive drum 9) temperature sensor, a P sensor, and the like.

5 ICPU62 input port PIO, pH and output port P20. P21 connects to the ADF device 2 via the connector.
It is connected to the control input/output terminal of the sorter (not shown), from which data is communicated serially, and the AD
Executes F2 and sorter control. Input port P
14. P15° PI3 and a dip switch DIPsw connected to PI3 are for specifying the type of ADF2 and sorter.

In addition, the input port RXD and output port TXD of the MCPU 50 have S2CPUs 63 and 53C, respectively.
An output port TXD and an input port RXD of a PU (not shown) are connected, and data is transmitted and received serially from there.

32CPTJ63 is provided on the operation board of the copying machine, and reads key operations and controls display.

When reading key operations, output ports PDO to P
Transfer the scan signal from D7 to driver 1 (64),
Signals corresponding to key operations transferred from buffer 1 (65) are read at input ports ANO to AN7. Specifically, in Fig. 2, a key switch consisting of a switch contact and a diode is indicated by a 0 mark, and this is connected to the intersection of the output line of driver 1 (64) and the input line of buffer 1 (65). is inserted, and driver 1 (
64) outputs H level to the output line in order according to the scan signal, so the buffer! Key operations are read by correlating the level reading of the input line (65) with the scan signal.

When the key operation is read, it is written to the key operation data store area of the internal RAM, and the 52 CPU 6
3 is selected (select 1), serial read data is transferred from the serial output terminal TXD of the 32 CPU 63 to the serial input terminal RXD of the MCPU 50 by interrupt processing.

In the display, when 52CPU63 is selected by MCPU50 (select 1), MC
Serial display data output from the serial output terminal TXD of the PU 50 is read from the serial input terminal RXD of the 52 CPU 63, and written to the display data store area of the internal RAM.

In response to the scan signal output to the driver 1 (64), the 32 CPU 63 displays the display data from the output ports PBO-PB7 to the driver 2 (66) and from the output ports PAO to PA7 to the driver 3 (67). Output a signal.

Specifically, in FIG. 2, the indicator lamp made of a light emitting diode is indicated by O, and this is the driver 1 (6
Driver 1 (64) is inserted at the intersection of the output line of Driver 2 (66) and Driver 3 (67), and is connected to one end of the light emitting diode that is instructed to display by display data. ) becomes H level due to the scan signal, driver 2 (66) or driver 3 (67) to which the other end is connected
The light emitting diode is energized by setting its output line to L level.

The 53 CPU (not shown) includes a first carriage (not shown) on which the exposure lamp 3 and the first mirror 4 are mounted, and
It controls the speed of a second carriage (not shown) on which the second mirror 5 and third mirror 6 are mounted, and controls the position of the condenser lens 7 during zooming. That is, MCPU
When 33CPtJ is selected (select 2) by 50, the serial scaling data and size data (recording paper size) etc. output from the serial output terminal TXD of MCPU 50 are read from the serial input terminal of 53 CPU, and are stored in the internal RAM. Write to the scaling data store area and size data store area respectively.

The CPU 53 controls the position of the condenser lens 7 according to the variable magnification data. Further, the document scanning speed and the document scanning range are set using the scaling data and the size data, and when a copy start instruction is received, document scanning control is executed at a predetermined timing.

Although not shown, the first carriage carrying the exposure lamp 3 and the first mirror 4 is equipped with a light receiver for detecting the background density of the original, which is led to the background density detection circuit via an optical fiber. (For details, see patent application No. 60-0060.
97). This background density detection circuit output terminal is 53C
Connected to the analog input port of the PU, 53CP
U reads this and stores it in the internal RAM as the original background data.
Stored at. In automatic density adjustment mode, MC
When the CPU 53 is selected (select 2) at a predetermined timing by the PU 50, the original background data is outputted from its serial output terminal to the serial input terminal RXD of the MCPU 50. The MCPU 50 sets a developing bias voltage based on this original background data, and performs optimum density adjustment according to the original.

The explanation will be made with reference to FIG. 3, which shows the external appearance of the operation board operated by the operator.

70 is a program key. This key is an alternate switch, and each key operation repeatedly sets and cancels the program mode. In program mode,
The indicator lamp 71 lights up.

72 is a mode clear key, which sets the standard mode for each key operation.

76 is a designated paper size indicator that displays the recording paper size (designated paper size) specified by the copy conditions read from the nonvolatile memory area of the RAM 53 in the program mode, and 77 is a designated paper size display that matches the designated paper size. This is a confirmation display lamp that indicates confirmation of the paper feed cassette when the paper feed cassette that accommodates the recording paper is not mounted on any of the first to fifth paper feed trays.

88 is a print key for inputting a copy start instruction (or ADF start instruction).

This key 88 is a transparent display key switch, has a green lamp and a red lamp behind it, and is ready.
(Ready) Cent (copy possible) green lamp lights up and red lamp goes out), Ready reset (copy not possible) red lamp lights up (green lamp goes off).

89 is an interrupt key. This key is an alternate switch, and the interrupt mode is set and canceled every time the key is pressed.When the interrupt mode is set, the interrupt display lamp 9
0 lights up.

91 is a numeric keypad. In the program mode, a number specifying the nonvolatile memory area of the RAM 53 is specified by operating this key (1 to 5 only). Further, the number of copies set is specified outside the program mode. The number of copies set can be set between 1 and 99 copies of the same original, and the set number is displayed on the set number display 94.

Reference numeral 95 is a copy number display, which displays the number of copies.

92 is a # key, which is used in program mode. The program mode will be described later.

93 is the C key. With this key operation, the number of copies in the copy set is set to the initial value @ (1 copy).

96 is a double-sided key. This key is an alternate switch, and each key operation repeatedly sets and cancels duplex mode. When duplex mode is set, duplex display lamp 9
7 lights up.

There are two duplex modes; the first is a front copy mode and the second is a back copy mode. In the front copy mode, the duplex display lamp 97 and the front display lamp 98 are turned on, and front copies of the set number of recording sheets are executed.

When this is completed, the back copy mode is set, in which the duplex display lamp 97 and the back display lamp 99 are lit, and the intermediate tray 36 is automatically selected.
Executes a copy of the back side of a recording sheet that already has a copy.

101 is a dark key, and 102 is a light key.

These are key switches used for manual density adjustment. The manual density WR setting of this device has seven levels, and darker levels (lower numerical values indicating the level) are set sequentially by operating the dark key 101, and lighter levels (higher numerical values indicating the level) are set by operating the light key 102. Set sequentially.

Reference numeral 105 denotes a manual density display, which indicates the level of manual density being set by lighting up a 0 mark. This display 105 shows a dark stage toward the left and a light stage toward the right.

103 is an auto key. This key is an alternate switch, and the automatic density adjustment mode is repeatedly set and canceled each time the key is operated.

When automatic density adjustment mode is set, manual density display 1
The display 05 goes out and the auto display lamp 104 lights up.

100 is an error indicator, from the left: sorter error indicator,
Paper jam indicator, toner supply indicator.

These are the toner collection indicator and the call service person indicator.

These indicators light up when a corresponding abnormality occurs.

Reference numeral 106 is a paper feed indicator, which indicates when no paper cassette is installed in the paper feed tray being set, or when no recording paper is stored in the paper feed cassette installed in the paper feed tray being set. , this indicator lights up.

Bit is a warning indicator lamp that indicates an abnormality in battery voltage. This indicator lamp indicates that the battery BT of the battery backup circuit 54 is at a predetermined voltage (for example, 2.8V).
Lights up when below.

107 is a copy permission indicator lamp, and 108 is a copy prohibition indicator lamp. When Ready is set (copy is allowed), the copy-ready indicator lamp 107 is lit and copy-prohibited indicator lamp 108 is turned off), and when Ready is reset (copy is not allowed), the copy-ready indicator lamp 108 is lit (copy-ready indicator lamp 107 is turned off).

109 is a paper key. Each time this key switch is operated, the paper feed tray changes from the 1st tier paper feed tray → the 2nd tier paper feed tray → the 3rd tier paper feed tray → the 4th tier paper feed tray → the 5th tier paper feed tray → the 1st tier paper feed tray. Tier paper feed stand→・
...and update settings.

Reference numeral 110 is a paper size indicator, which displays the size of the recording paper in the paper feed cassettes installed on the paper feed table of each stage (A
3. A4. A5. B4. B5 or B6 display, vertical or horizontal display, or universal (*) display]
lights up. All the displays of paper feed trays and output tanks in which paper feed cassettes are not installed are turned off.

The paper feed tray being set is displayed by lighting up the outer frame of the paper feed tray on the paper size display 110. When no paper feed cassette is installed on the paper feed tray of this stage, or when no recording paper is stored in the installed paper feed cassette, the paper end indicator 106 lights up.

111 is a reduction key, and 112 is an enlargement key. This copying device has a linear ratio of 0.5 to 2.0 (50% in percentage).
-200%) can be set as desired. When the reduction key 111 is operated, the magnification ratio is updated to successively smaller values within this range, and when the enlargement key 112 is operated,
The magnification is updated and set to successively larger values within this range.

Reference numeral 113 is an equal magnification key, and when this key switch is operated, the magnification ratio is set to equal magnification (100% in percentage).

115 is Xl, 15 key, and when this key switch is operated, the magnification ratio is 1.15 times (115% in percentage)
, and the Xl, 15 display lamp 116 lights up.

117 is an Xo, 82 key, and when this key switch is operated, the magnification ratio is set to 0.82 times (82% in percentage) and the Xo, 82 display lamp 118 lights up.

119 is the Xo, 71 key, and when this key switch is operated, the magnification is set to 0.71 times (71% in percentage), and the Xo, 7] display lamp 120 lights up.

Reference numeral 114 is a magnification ratio display that displays the magnification ratio being set as a percentage.

121 is an ADF/5ADF key. This key is an alternate switch, and the ADF mode and 5ADF mode are set alternately each time the key is operated. ADF display lamp 122 or 5 corresponding to the mode being set respectively
The ADF display lamp 123 lights up.

124 is a sort/stack key. This key is an alternate switch, and the sort mode and stack mode are set alternately with each key operation.

In the sort mode, the sort indicator lamp 125 lights up,
Copies are automatically collated by a sorter (not shown).

In addition, in the stack mode, the stack display lamp 126
lights up, and copies are automatically sorted by a sorter (not shown).

Here, the operation in program mode will be explained.

Call up> Operate the program key 70 to set the program mode.

Next, operate the numeric keypad 91 to select the program number that stores the copy conditions to be called.

Enter (1-5).

The input program number is displayed on the display 95, and the copy conditions (registered data) recorded in Sl are associated with it.
is called and set. At this time, if there is no registered data, 'EP' will be displayed on the display 95, and if the registered data is protected (updates are prohibited), P'' will be displayed in front of the entered program number (for example, No.

3 is protected, 'P3' is displayed on the display 95).

When you release your finger from the numeric keypad 91, the program mode is canceled.

Register > Operate each key on the operation board to set the copy conditions.

The program mode is set by operating the program key 70.

While pressing the # key 92, operate the numeric keypad 91 to input the program number (1 to 5) to be registered. If the input program number and the corresponding M8 data are protected, "PE"' will be displayed on the display 95 and registration will not be performed, but if not, the input program number will be displayed and the setting The copy conditions are W@ (
(written into the nonvolatile memory area of the RAM 53).

When you release your fingers from the numeric keypad 91 and # key 92, the program mode is canceled.

Next to ``Protect'' and ``Register'', press the number 110 Hl key on the numeric keypad 91 while holding down the # key 92.

``P'' will be displayed in front of the input program number,
Registered data is protected.

When you release your fingers from the numerical value "011" key on the numeric keypad 91 and from the # key 92, the program mode is canceled.

To cancel protection> Operate the program key 70 to set the program mode.

Next, by operating the numeric keypad 91, the program number (1 to 5) for which protection is to be canceled is input.

The display 95 shows “P II and input program N.
o is displayed (1 when not protected).
1 P11 is not indicated).

While holding down the key on which the program number was entered on the numeric keypad 91, operate the C key 93.

The protection is canceled, 11 P $1 is no longer displayed, and the program mode is canceled.

Figure 5a, Figure 5b, Figure 5C, Figure 5d, Figure 5e,
Figures 5f, 5g, 5h, 51, 5j, 5th and 5Q show the copy conditions by operating each key switch on the operation board of the control system shown in Figure 2. 2 is a flowchart showing a general control operation mainly based on settings of .

Description will be given with reference to these drawings.

First, the main terms used in these flowcharts are defined below.

Program register: Stores the number specified in program mode.

Set register: Stores the set number.

Density register: Stores the density adjustment stage.

Size register: Stores the specified recording paper size (code in Table 1).

Magnification register: Stores the magnification ratio.

Interrupt register: A save register that saves the copy conditions being set.

Numerical register: Stores the value corresponding to the operated numeric keypad.

Paper feed tray counter: Indicates the paper feed tray number.

rKEYJ flag: Detects the rise of key switch operation.

"Program" flag: Indicates program mode setting.

“# key” flag: Indicates that the # key 92 is continuously pressed down.

"Interrupt" flag: Indicates interrupt mode setting.

"Shift" flag: Indicates whether there is a carry in the set register.

rxl, 15J flag: Magnification ratio 1.15x (115%)
Indicates that it is specified.

"rxo, 82" flag: Indicates that a magnification ratio of 0.82x (82%) is specified.

rXo, 71J near lag: magnification ratio 0.71x (71%
) Indicates that there is a specification.

“Double-sided” flag: Indicates duplex mode setting.

“Back” flag: Indicates the back side copy mode setting.

rADFJ flag: If present indicates ADF mode setting, if absent indicates 5ADF mode setting.

"Sort" flag: If present indicates sort mode setting, if not indicates stack mode setting.

“Dark” flag: Indicates that the dark key 101 is continuously pressed down.

“Light” flag: Indicates that the light key 102 is continuously pressed down; “Autono flag: Indicates automatic density adjustment mode setting.

“Reduction” flag: Indicates that the reduction key 111 is continuously pressed down.

“Enlarge” flag: Indicates that the enlarge key 112 is continuously pressed down.

"Confirmation" flag 2 Indicates that the specified paper is not set on the paper feed tray.

See Figure 5a. In the following description, each step in the flowchart is indicated by ``S II'' (rrSHp is omitted in the flowchart).

When the power is turned on, the output ports of each microcomputer, the outside of the nonvolatile memory area of the RAM 53, and the internal RAM of each microcomputer are initialized by the Sl.

In S2, the protection circuits of each part of the device configuration are scanned and if an abnormality is found (33), abnormality processing such as setting the corresponding display on the abnormality indicator 100 is performed (S4). S4→S2→.

...I can't get out of the loop.

In the process of reading the status of each part, in addition to scanning the protection circuit, the size detection sensor 57 and its decoder driver 58 read the detection marks on the paper feed cassettes installed on the paper feed trays of each stage, and detect whether there is recording paper or not. Read and create the size table mentioned above,
Then, the display of the paper size display 110 is set.

In S5, the standard mode of the copying device is set.

In this case, set the number of sheets to 1 (set counter ← 1
); Automatic density adjustment mode setting ("Auto" flag set); Density center (density register ← 4); 1st paper feed tray setting (paper feed tray counter ← 1); Variable magnification equal to magnification (variable magnification register ←
100); ADF mode setting (rADFJ flag set); Sort mode setting (“Sort” flag set);
Reset other flags: and.

In S6, a power relay (not shown) is turned on to supply power to each part, and the presence or absence of an abnormality is checked again in the same manner as in S2. If there is no abnormality (37, S8), a standby mode is set.

In the standby mode, a loop is formed to wait for key operation input on the operation board, and each loop returns to 87 to read each part S. In this case, the backup circuit 5
The voltage of the battery BT No. 4 (Fig. 2) is A/D converted and read, and compared with a predetermined voltage (for example, 2.8 V). When the battery voltage falls below the predetermined voltage, the warning lamp Bat (the third (Fig.) lights up to notify abnormal battery voltage. Also, at this time, the presence or absence of an abnormality is determined from the state of each sensor, and the detection mark and presence/absence of recording paper on the paper feed cassettes mounted on each stage paper feed table are read to create a size table.

In S16, the key operations on the operation board are read by the aforementioned driver 1 (64) and buffer 1 (65).

See Figure 5c.

When the operation of the program key 70 is read in the input reading in S16, it is detected in 5101. At this time, rKEY
If the J flag is present, it means that another key or program key 70 has already been operated and that operation is continuing, so the process returns from 5102 to 87. If there is no rKEYJ flag, this is the start of the key operation of the program key 70.

This flag is set in step 5103.

The program key 70 is an alternate switch; if this key is operated when no program mode is set, the program mode is set, and if this key is operated while the program mode is set, the program mode is canceled. do. In other words, when the "program" flag is not set, 5104 → 5105 → 510
6, and when the program code flag is set, the display lamp 71 is lit, and the "program" flag is set, the program progresses from 5104 to 5107 to 5108, and then to "
program" flag is reset and the display lamp 71 is turned off.

See Figure 5d.

When the operation of the interrupt key 89 is read in the input reading at 316, it is detected at 5111. At step 5112, the presence or absence of the rKEYJ flag is checked, and if the rising edge of the operation of the interrupt key 89 is detected (that is, there is no rKEYJ flag), the rKEYJ flag is set at step 5113. If the rising edge is not detected, the process returns to S7.

Interrupt key 89 is an alternate switch; if this key is operated when interrupt mode is not set, interrupt mode is set, and if interrupt mode is set and this key is operated, interrupt is disabled. cancel the embedding mode. In other words, "interrupt"
When the flag is not set, 5114 → 511
Step 5, set the "interrupt" flag, turn on the interrupt display lamp 90, save the copy condition being set to the interrupt register (PUSH), and set "5114 when the interrupt J flag is set. →Proceed to 5116, reset the "interrupt" flag, turn off the interrupt display lamp 9o, and call and set the copy conditions being saved from the interrupt register (PO
P).

When the operation of the numeric keypad 91 is read in the input reading at 816, it is detected at 5117. 5118 checks whether the rKEYJ flag is present, and if the rising edge of the operation of the numeric keypad 91 is detected (there is no rKEYJ flag), the rKEYJ flag is checked in 5118.
Set the KEYJ flag. If it is not a rising edge detection,
The process proceeds to 8175 and below in FIG. 5g, which will be described later.

In step 5120, the numerical value corresponding to the operated numeric keypad 91 is set in the numerical value register.

Since the operation of the numeric keypad 91 outside the program mode is to specify the number of sheets to be set, if there is no "program" flag, the process advances from 3121 to 5122.

The number of sheets to be set is specified by a numerical value from 1 to 99, and the "shift" flag is a flag for detecting carry.

In other words, "When there is no shift flag, it is the first digit input, so if the value of the numerical register is not 0 (the first digit O is meaningless), proceed as 5123 → 5124 → 5126,
The "shift" flag is set, the value of the numerical register is set in the 1 digit of the set register, and this number is displayed on the set number display 94.

Next, when the numeric keypad 91 is operated, the "shift"
Since the flag is set, proceed from 5122 to 5125, shift the set register by one high-order digit, set the value of the numerical register to the 1 digit of the set register, and display this number on the set number display 94. do.

The operation of the numeric keypad 91 in the program mode is to specify the program number, so if the "program" flag is present, the process advances from 5121 to $127.
Since the program number is 1 to 5, if the numerical register value is outside this range, a message "EP" indicating that there is no registered data is displayed on the copy number display 95 at 5132.
” is displayed, the “program” flag is reset at 5133, 0 is stored in the program register (described next), and the process returns to S7.

If the value of the numeric register is 1 to 5, set the value of the numeric register to the program register in 5128, and 5129
The value of the program register (i.e.,
Read the address data corresponding to the program No.).

Here, the address table will be explained.

FIG. 4b shows an example of address data corresponding to No. 1 in the address table. The address table consists of five address data corresponding to N001 to N005, respectively, configured in the same way.

Each address data is an area (R,
The 3rd to 5th bits indicate program No. 0; the 6th bit indicates whether or not the copy condition associated with that number is written (1: With writing, 0: No writing); MS
B indicates whether or not protection is specified for the copy condition written in association with that No. [1: With protection (
0: update possible without protection)]. In the example of FIG. 4b, the copy condition is set to the start address E1 of the RAM 53 in association with the program No. 1.
It is written to a non-volatile memory area starting with 00 (hexadecimal), and the copy condition indicates that it is not protected.

Referring again to FIG. 5d, at 5130, the program number input to the copy number display 95 is displayed in the 1's digit. As mentioned above, the 6th bit of the address data indicates whether or not the copy condition associated with the program number is written, so when it is 0, 5131 to 51
32, the message ``EP'' indicating that there is no registered data is displayed on the copy number display 95, the ``program'' flag is reset in 5133, Q is stored in the program register, and the process returns to S7.

When the 6th bit of the address data is 1, the 7th bit (MSB) is further checked in 5134, and if it is 1, it means that the data is protected, so in 5135, the 10's position of the copy number display 95 is set. (Display P II. In other words,
When protection is set, 10 on the copy number display 95
"P 11" is entered in the 1s digit, and program N is entered in the 1s digit.
Display o. After this, the process proceeds to the flow shown in FIG. 5e.

See Figure 5e.

5137, from the area of the RAM 53 corresponding to the address data, the value of the scaling register, the value of the density register, the value of the size register, the value of the paper feed counter, rXl, 15J flag, rXo, 82J flag, rXo, 71J flag,
"Double-sided" flag.

The presence/absence of the "sort" flag and the "auto" flag are read and set respectively, and in 5138, the duplex display lamp 9 is lit according to the copy conditions currently being set.
7. Front display lamp 98. Back indicator lamp 99. Xi
, 15 display lamp 116°Xo, 82 display lamp 118
．． X0.71 indicator lamp 120. ADF display lamp 12
2,5 ADF indicator lamp 123. Sort indicator lamp 12
5. The stack display lamp 126 and the automatic display lamp 104 are turned off, and if the concentration display is being displayed on the concentration display 105, it is stopped.

5139 sets 1 to the set register and 514
0 resets the "shift" flag mentioned above. That is, when the registered copy conditions are called up, the number of copies is always set to one.

In step 5141, the read value of the scaling register, that is, the scaling ratio is displayed on the scaling ratio display 114.

If the state before calling up the registered copy condition is the back side copy mode of the duplex copy mode, the "back" flag is set, so check whether the "back" flag is present in 5142 and set the "back side" copy mode. ” flag is set, it is reset at 5143.

In steps 5144 to 5160, the display is set depending on the presence or absence of each flag. That is, when the "double-sided" flag is present, the duplex display lamp 97 and the front display lamp 98 are turned on.
lights up, and when the rxl and 15J flags are present, the
15 display lamp 116 is lit, rXO, 82J flag is present, Xl, 15 display lamp 118 is lit, rXo, 71J flag is present, XO, 71 display lamp 120 is lit, rADFJ flag is present, ADF The display lamp 122 is lit, and when there is no rADFJ flag, the 5ADF display lamp 123 is lit.

When the “sort” flag is present, the sort indicator lamp 125
When there is no "sort" flag, the stack display lamp 126 is lit; when the rADFJ flag is present, the ADF display lamp 122 is lit; when the "auto" flag is present, the auto display lamp 104 is lit; When there is no "auto" flag, the concentration is displayed on the concentration display 105 according to the value in the concentration register.

After displaying, the flow proceeds to the flow shown in FIG. 5f.

See Figure 5f.

In steps 8161 and below, the size table in the RAM 53 is referred to to search for a paper feed tray in which recording paper of a size corresponding to the value of the size register is set. In this,
First, 8161 sets the A register to 1, and 5162
Reads the paper size data of the paper feed tray corresponding to the value of the A register from the size table and sets it in the SIZ register, and compares the value of the size register with the value of the SIZ register in step 8163.8 If the two do not match, At 8164, the value of the A register is incremented by 1 (+B.

Since the paper feed table has five stages, if the value of the A register exceeds 5, it means that there is no paper feed table set with recording paper of the size corresponding to the value of the size register, and the process proceeds from 5165 to 5166. , set the "confirm" flag here,
At 5167, the confirmation display lamp 77 is turned on, and at 5168, the size lamp (A3.A4.A5.B4.BS or B6 display lamp, and vertical or horizontal display lamp) corresponding to the value of the size register of the specified size display 76 is turned on. , or the universal (*) indicator lamp]. After this, set the paper feed tray according to the value of the paper feed tray counter read out from the RAM 53, and set the paper size display 110.
Lights up the frame indicating the corresponding paper feed tray. In other words, RAM5
If the recording paper of the size corresponding to the value of the size register read from RAM 53 is not loaded on any paper feed tray, the paper feed tray is set according to the value of the paper feed tray counter read from RAM 53, and the size register is Display the value on the display 76 and check the cassette! ! > is displayed to notify you of the paper size confirmation.

If the operator has decided which paper cassette to install for each paper feed tray, the paper feed tray set at this time will be equipped with a paper cassette containing recording paper of the size corresponding to the value in the size register. It serves as a paper feed tray for printing. Therefore, the operator can simply load the paper cassette containing recording paper of the size displayed on the display 76 into the paper feed tray determined by the operator in association with the paper size, and then select the paper feed tray from now on. key operations are no longer necessary.

If the value of the size register and the value of the SIZ register match in 5163 before the value of the A register exceeds 5, 51
At step 70, the value of the paper feed counter is updated with the value of the A register.

At step 8169, the paper feed tray is set according to the updated paper feed counter value, and the frame indicating the corresponding paper feed tray on the paper size display 110 is lit. In this case, if the "confirmation" flag is set, the process proceeds from 5171 to 5172, where the "confirmation" flag is reset, the confirmation display lamp 77 is turned off at 5173, and the specified paper size display 76 is turned off at 5174.
Turn off all size display lamps.

From 8169, the process returns to 87 of the flow shown in FIG. 5a.

After this, press the program number on the numeric keypad 91.

While the key used to input is held down, S7→.

...→5117→5118→5175→519
0→S7→,... constitutes a loop (if the C key 93 is operated, the protection will be canceled as described later), but when the key is no longer pressed, no input is entered in the program register. Since the stored program No.
17→S 195→5196→5199→5201→5
202 (Fig. 5h), and here "Reset the program code flag and set the value of the program register to O (cancellation of program mode). After this, go to S7 again →...
....

→ 5117 → 5195, this time it's "Program"
Since the flag is not set, the process proceeds from 5203 to 5204, and the display regarding the program mode, that is, the program number displayed on the copy number display 95, or
" p I+ and the program number are turned off, the number of copies, that is, 0 (0 before copy processing) is displayed, and the program display lamp 71 is turned off.

8205 and below will be described later.

The above is the process corresponding to the above-mentioned call.

See Figure 5g.

When the program key 70 is operated and the program mode (with "program" flag) is set, S7→
..., →5117→S195→S 196→S 1
99→S201→S7→, . . . forms a loop. When # key 92 is operated in this loop, 51
96 → 5197 → 5198, and set the "# key" flag and rKEYJ flag. When the # key 92 is no longer operated (pressed), 5196 → 5199 → 520
Go to 0 and reset the "# key" flag. In other words,
The "# key" flag is a flag indicating that the # key 92 is being continuously operated (pressed down) in the program mode.

If the numeric keypad 91 is operated while this "# key" flag is set, the "rKEY" flag is set at 5198, so 811 of the flow shown in FIG. 5d is set.
8, the process proceeds to 8176 of the flow shown in FIG. 5g. See Figure 5g.

In step 8176, the numerical value corresponding to the operated numeric keypad 91 is set in the numerical value register.

At 5177, the value of the numerical register is examined.

At this point, the program register is not set, so its value is O. Therefore, if the value of the numerical register is 0 or a value between 6 and 9, the program register 5177→5185-+5186-+5189
a or S 177) Proceed to S185 → 5189a,
After setting the dummy data 11711 in the program register, in step 3189b, "PE" indicating an error is displayed on the copy number display 95. Dummy data will be described later.

In 5177, if the value of the numerical register is 1 to 5, the value of the numerical register is set in the program register in 5178, and in 5179, the value of the program register (i.e. , program N00).

At 5180, the 7th bit of the address data is checked, and if it is 1, the registered data (copy condition) corresponding to that program number is protected, so the 7th bit of the address data is checked.
The process advances to step 189b, and "PE" indicating an error is displayed on the copy number display 95.

If the seventh bit of the address data is O, the program number is displayed on the copy number display 95 at 5181.

is displayed, and the 6th bit of the address data is set to 1 at 5182.
(with writing). After this, at 8183,
In the area of the RAM 53 corresponding to the address data, the value of the scaling register, value of the density register, value of the size register, value of the paper feed counter, rX, which indicates the copy condition being set,
l, 15J flag, rxQ, 82J flag, rxo,
71" flag, "double-sided" flag, "sort" flag, and "auto" flag.

After this, at 5184, the program number of the address table in the nonvolatile memory area of the RAM 53 is determined.

(ie, the value of the program register), and the process proceeds to step 8195 of the flow shown in FIG. 5h.

While the # key 92 is continuously operated (pressed down),
5195→5196→5197→S7→.

・・・・→Sl　17→5195→、・・・・.

However, when the # key 92 is no longer operated, it progresses from 5196 to 5199 to 5200, and at 22, r#
Reset the "Key" flag. The program register contains the input program No.

Since (1 to 5) or dummy data "7" is stored, the "program" flag is reset in 5202 and the value of the program register is set to 0 (cancellation of program mode). After this, S7 is returned to →... ..., →511
7 → 5195, since the "program" flag is not set this time, the process goes from 3203 → 5204, and the display related to the program mode, that is, the program No. displayed on the copy number display 95, or "
p 11 and program No. or “P E
” is turned off, the number of copies, that is, O (0 before copy processing) is displayed, and the program display lamp 71 is turned off.

The above is the process corresponding to the above-mentioned registration.

After this registration, the # key 92 is continuously operated (
When pressed (depressed), S7→,...

→5117→5195→5196→5197→SS7→
,..., constitutes a loop. At this time, if there is an operation on the numeric keypad 91 corresponding to the number 0, S7→...
・→5117→5118→S175→5176→S 1
77→S 185→5186, and here the value of the program register is checked. In this case, in step 8178 of the above registration process, the program number (1 to 5) whose copy condition was registered is stored in the program register, so in step 5187, the seventh bit of the address data is set to 1 and registered. Protect the copied data (copy conditions) and set it to the 10's on the copy number display 95 at 5188.
Display p 11. In other words, when protect is specified, "p 11" is displayed in the 10's position on the copy number display 95.
Program number in which the copy condition being set is registered in the 1st digit
, display.

In step 5184, address data is written in the area corresponding to the program number (ie, the value of the program register) in the address table of the nonvolatile memory area of the RAM 53, and the process proceeds to step 8195 in the flow shown in FIG. 5h.

After this, while the # key 92 is continuously operated (pressed down), 5195→5196→5197→S7→・
・ ・ ・ ,→S 117→S 195→, ・
. . . constitutes a loop, but when the # key 92 is no longer operated, the process progresses from 5196 to 5199 to 5200, and the "# key" flag is reset here.

Since the program register stores program numbers (1 to 5) with protected data (copy conditions), the "program" flag is reset in step 5202, and the value of the program register is set to 0 (to cancel program mode). ), the process returns to 87 in the flow shown in Figure 5a.Proceeding again to S7→,...,→5117→5195, this time the "program" flag is not set, so the process progresses to 5203→5204. , the display related to the program mode, that is, the number of copies displayed on the copy number display 95.
p l# and program N o are turned off to display the number of copies, that is, 0 (0 before copy processing), and the program display lamp 71 is turned off.

The above is the process corresponding to the above-mentioned protection.

When the program key 70 is operated and the program mode (with "program" flag) is set, S7→
...→5117→5195→5196→5199
→52014S7→, . . . constitutes a loop. It has already been mentioned that when the numeric keypad 91 corresponding to the numerical values 1 to 5 is operated in this loop, the process corresponding to the above call is performed. In this case, following this process, when the numeric keypad 91 is continuously operated (pressed down), S7→...→5117→5118→517
5→5190→SS7→, . . . constitutes a loop. When the C key 93 is operated (depressed) while forming this loop, the process advances from 5190 to 5191.

If the operation is subsequent to the above call process, the program number that called the copy condition is stored in the program register.

, the program N is stored in the address table in the non-volatile memory area of the RAM 53 in 5193. o.

(that is, the value of the program register).

Since the protection has been canceled, 5194 resets 'P'' which was set in the 10's of the copy number display 95 in 8135 of Fig. 5d, resets the "program" flag, and sets the value of the program register to 0. After that, the process returns to step 87 in the flow shown in FIG. 5a.

The above is the process corresponding to the protection cancellation described above.

See Figure 5h.

When reading the input of 316 and operating the C key 93,
Detected at 5205.

Use 8206 to check whether the "rKEY" flag is present or not, and press C key 9.
If the rising edge of key operation 3 is read, the rKEYJ flag is set in step 5207.

5208 sets the value of the set register to 1,
The "shift" flag indicating the carry of the set register is reset, and the set number (1 [sheet]) is displayed on the set number display 94.
) is displayed.

See FIG. 51.

When the input is read in S16, if the double-sided key 96 is operated, it is detected in step 5212.

5213 to check whether the "rKEY" flag is present or not, and if the rising edge of the key operation of the double-sided key 96 is read, 5214
Set the "KEY" flag with .

5215 checks whether there is a "duplex" flag, and if this flag is not present, it is an instruction to set duplex mode, so 82
Set the "double-sided" flag in step 16, and turn on the double-sided display lamp 97.
Then, the front display lamp 98 is turned on.

5215 checks whether there is a "duplex" flag, and if this flag is present, it is an instruction to cancel the duplex mode, so 521
7 to reset the "double-sided" flag and double-sided display lamp 97
Then, the front display lamp 98 is turned off.

If you have already finished copying the front side in 1-duplex mode, the back side copy mode is set, so 5
If there is a "back" flag in 218a, 5218b
After resetting this and turning off the back display lamp 99, the process returns to S7.

If the dark key 101 is operated during input reading in S16, it is detected in step 5219.

5220 checks whether the rKEYJ flag is present, and if the rise of the key operation of dark key 101 is read, 52
At step 21, the rKEYJ flag and the "dark" flag for detecting continuous operation (pressing) of the dark key 101 are set. Since this operation of the dark key 101 indicates the operator's intention to perform manual density adjustment, the "auto" flag is reset in step 5222, and the auto display lamp 104 is turned off.

As mentioned above, the manual density adjustment of this copying apparatus has seven stages, and these stages correspond to the values of the density register. That is, the smaller the value of the density register, the darker the stage, and the value 1 represents the darkest first stage density. Therefore, if the value of the density register is 1 in 5224,
Since a darker level cannot be set, the operation of the dark key 101 is canceled.

If the value in the concentration register is not 1, the concentration register is decremented by 1 in 5225, and in 8226, the manual concentration display 105 displays the value corresponding to this concentration register value, that is, the 0 mark on the manual concentration display 105 is changed by one. Shift to the left and turn on.

Thereafter, a time delay of dtl (for example, 0.3 seconds) is performed at 5227, and the process returns to 87.

Therefore, if the dark key 101 is continuously operated, it will be detected again at 5219, and this time it will be detected at 5220.
The rKEYJ flag is set, but since the "dark" flag is set, the process proceeds from 5223 to 5224, and if the value of the density register is not 1, the density is set one step darker at dt1 time intervals, and the manual density is set. Display device 105
The 0 mark is shifted to the left one by one and turned on (S225°5226, 5227).

As will be described later, the "dark" flag is set to dark key 10.
It is reset when the operation (pressing down) of step 1 is stopped.

When the input is read in S16, if the light key 102 is operated, it is detected in step 5228.

5229 checks whether the rKEYJ flag is present, and if the rising edge of the key operation of the light key 102 is read, 52
At 30, the rKEYJ flag and the "write" flag for detecting continuous operation (pressing) of the write key 102 are set. Since this operation of the light key 102 indicates the operator's intention to perform manual density adjustment, the "auto" flag is reset in step 5231, and the auto display lamp 104 is turned off.

The values in the density register correspond to the density levels, with the value 7 indicating the seventh level density, which is the lightest. If the value of the density register is 7 in step 5233, it is not possible to set a lighter level than that, so the operation of the light key 102 is canceled.

If the value of the concentration register is not 7, the concentration register is incremented by 1 at 5234, and the manual concentration display 105 displays the value corresponding to the value of this concentration register at 8226;
That is, the 0 mark on the manual concentration display 105 is shifted one place to the right and turned on.

Thereafter, a time delay of dtl (for example, 0.3 seconds) is performed at 5227, and the process returns to 87.

Therefore, if the light key 102 is continuously operated, it is detected again at 5228, and this time it is detected at 5229.
The rKEYJ flag is set, but since the "write" flag is set, proceed from 5232 to 5233, and if the value of the density register is not 7, set the WIwI density one step at a time interval of dt1, and manually Concentration display 1
Shift the 0 mark of 05 one by one to the right and turn it on (322
5°3226.5227).

As will be described later, the "write" flag is set to the light key 10.
It is reset when the operation (pressing down) of step 2 is stopped.

When the input is read at 816, if the auto key 103 is operated, it is detected at 5235.

5236 checks whether the rKEYJ flag is present or not, and if it reads the rise of the key operation of the auto key 103, it is 5.
237 sets the rKEYJ flag.

Since the auto key 103 is an alternate switch,
The presence or absence of the "auto" flag is checked at 8238, and if this flag is not present, the instruction is to set the automatic density adjustment mode, so the "auto" flag is set at 5239, the auto display lamp 104 is lit, and the manual density display is started. vessel 10
Turn off the display of 5.

Check the presence or absence of the "auto" flag with 5238.

If this flag is present, it is an instruction to cancel the automatic density adjustment mode, so reset the "auto" flag at 5240,
The auto display lamp 104 is turned off, and the display on the manual concentration display 105 is turned on.

See No. 53 @.

If the paper key 109 is operated during input reading in S16, it is detected in step 5241.

5242 is used to check the presence or absence of the rKEYJ flag, and if the rising edge of the paper key 109 key operation is read, 524 is
3 sets the rKEYJ flag.

There are a total of 5 paper feed trays, and the value of the paper feed tray counter corresponds to this. Therefore, in 5244, check the value of the paper feed tray counter, and if this value is 5, then in 5245, check the value. Clear.

At 8246, the value of the paper feed tray counter is incremented by one, and the outer frame of the column corresponding to the value of the paper feed tray counter on the paper size display 110 is lit to display the set paper feed tray.

That is, each time the paper key 109 is operated, the value of the paper feed tray counter is incremented by 1, the paper feed tray of the next lower level is updated, and the column indicating the paper feed tray of the paper size display 110 is updated. The outer frame is shifted down by one position and turned on, but if the value of the paper feed tray counter is 5, that is, the lowest 5th stage paper feed tray is set, and the outer frame of this column on the display 110 is lit. In the next operation of the paper key 109, the setting returns to the uppermost first stage paper feed tray, and the outer frame of this column on the display 110 lights up.

Since the copy conditions change by operating the paper key 109,
In step 5247, the size table specified by the value of the 10 paper counter is referred to, and a value indicating the recording paper size for which paper feed is to be set is stored in the size register.

At 5248, the presence or absence of the "confirmation" flag is checked. This flag is used to call the program mode described above.
In the process, when the paper feed cassette containing recording paper of the size specified by the called copy condition is not installed on any of the paper feed trays, it is set in step 8166 of the flow shown in FIG. 5F. Operation of the paper key 109 means that the operator has finished checking the paper cassette, so in step 8249, this "confirmation" flag is reset, the confirmation display lamp 77 (cassette confirmation!) is turned off, and the specified paper size is The display on the display 76 is turned off.

In the input reading in S16, if the reduction key 111 is operated, it is detected in step 5250.

5251 to check whether the "KEY" flag is present or not, and if the rising edge of the key operation of the reduction key 111 is read, 525
2 cents the rKEYJ flag.

As mentioned above, this copying device has a linear ratio of 0.5 times (50%
) to 2.0 times (200%), and this scaling ratio corresponds to the value of the scaling register. In other words,
The value in the scaling register is equal to the scaling factor as a percentage. Therefore, if the value of the scaling register is 50, a smaller scaling ratio cannot be set, and in that case, the operation of the reduction key 111 is canceled in step 5254.

If the value of the scaling register is not 50, the scaling register is decremented by 1 in step 5255, and the scaling ratio corresponding to the value of this scaling register is displayed on the scaling ratio display 114.

If there is no "reduction" flag for detecting continuous operation (pressing) of the reduction key 111 in 8256, the reduction key 1
Since this is the first processing for 11 operations, d at 5257
Perform a time delay of tl (eg 0.3 seconds) and set the "shrink" flag.

5258, the standard scaling flag (rxl, 15J) is reset when standard scaling (described next) is set before the reduction key 111 is operated.

rXO,82J, rXo,71J flag)
The set flag and the corresponding display lamp (Xl, 1)
5 display lamp 116. Turn off the X0.82 indicator lamp 118 or the Xo,71 indicator lamp 120).

If the reduction key 111 is continuously operated, it is detected again by 5250, and this time, rKEYJ of 5251 is detected.
There is a flag, but since the "reduction" flag is set, the process proceeds from 5253 to 5254, and if the value of the displacement register is not 50, the scaling register is decremented by 1 at 5255, and the value of this scaling register is The magnification ratio corresponding to is displayed on the magnification ratio display 114.

In the next step 8256, since the "reduction" flag is set, the process proceeds to 8259, and a time delay of dt2 (0.1 seconds if it falls) is performed.

That is, when the value of the scaling register exceeds 50 and the reduction key 111 is continuously operated (pressed), the scaling ratio is first updated to a value smaller by 1% at dt1 time intervals, and from then on, The scaling factor is updated to a value smaller by 1% at dt2 time intervals.

If the enlargement key 112 is operated during input reading in S16, it is detected in step 5260.

5261 checks whether the rKEYJ flag is present, and if the rising edge of the key operation of the enlarged key 112 is read, 526
2 sets the rKEYJ flag.

The value of the scaling register is equal to the value of the scaling ratio expressed as a percentage, so if the scaling register value is 200, it is not possible to set a larger scaling ratio. 112 operation is canceled.

If the value of the scaling register is not 200, the scaling register is incremented by 1 in step 5265, and the scaling ratio corresponding to the value of this scaling register is displayed on the scaling ratio display 114.

If there is no "enlargement" flag for detecting continuous operation (pressing) of the enlargement key 112 in 8266, the enlargement key 1
Since this is the first processing for 12@saku, d in 3267
Perform a time delay of tt (for example, 0.3 seconds) and "zoom in"
Set flag.

At 8268, the above-mentioned standard magnification change reset is performed, and the process returns to S7.

If the enlargement key 112 is being operated continuously, it is detected again at 8260, and this time the rKEYj flag of 5261 is present, but since the "enlargement" flag is set, the process proceeds from 5263 to 5264. If the value of the scaling register is not 200, the scaling register is incremented by 1 in step 8265, and the scaling ratio corresponding to the value of this scaling register is displayed on the scaling ratio display 114.

In the next step 8266, since the "enlargement" flag is set, the process proceeds to 8269 and a time delay of dt2 (for example, 0.1 seconds) is performed.

That is, when the value of the scaling register is less than 200 and the enlargement key 112 is continuously operated (pressed), the scaling ratio is first updated to a 1% larger value at dt1 time intervals, and from then on, The magnification ratio is sequentially updated to a value 1% larger at dt2 time intervals.

Therefore, for example, dtl is 0.3 seconds and dt2 is 0.3 seconds.
When it is set to 1 second, when the scaling factor is quickly brought close to the target value, the scaling factor can be set at high speed by continuously operating (pressing) the scaling down key 111 or the expanding key 112. In addition, when making fine adjustments as the target value approaches, the "reduction" flag or "enlargement" flag will be reset when you stop operating the reduction key 111 or enlargement key 112, as will be described later. By repeating the operation within 0.3 seconds, the set value can be changed in 1% increments.

Fifth, refer to the figure.

When the operation of the same size key 113 is read in the input reading in S16, it is detected in 5270.

Check whether the rKEYJ flag is present or not with 5271, and if the rise of the key operation of the same size key 113 is read, 527
2 sets the rKEYJ flag.

At step 5273, the value of the variable magnification register is checked, and if this is 100, the variable magnification has already been set to equal magnification, so this key operation is canceled.

5273, if the value of the scaling register is not 100, 52
At 74, perform the standard magnification reset and set the value 1 to the magnification register.
Store 00.

Thereafter, in step 5294, the value of the scaling register, that is, 100, is displayed on the scaling ratio display 114.

When the input reading at 816 reads the operation of the Xl and 15 keys 115, it is detected at 3276.

Check the presence or absence of the rKEYJ flag with 5277, Xi, 1
If you want to read the rise of key operation of 5 key 115,
5278 sets the rKEYJ flag.

Check the presence or absence of the rxl, 15J flag on 5279,
If this flag is present, the standard magnification of 1.15x has already been set, so the new operation of the Xl, 15 key 115 is canceled.

If this flag does not exist, the standard scaling is reset at 5280, the value 115 is stored in the scaling register at 5281, and r
xl, 15'' flag is set, and the xi, 15 display lamp 116 is turned on.

Thereafter, in step 5294, the value of the scaling register, that is, 115, is displayed on the scaling ratio display 114.

In the input reading at S16, when the operation of the Xo and 82 keys 117 is read, it is detected at 5282.

Check whether rKEYJ flag is present or not on 5283, Xo,
If the rising edge of the key operation of the 82 key 117 is read, the rKEYJ flag is set in 5284.

At step 5285, the presence or absence of the "x0.82" flag is checked, and if this flag is present, the new Xo, 82 key 117 operation is canceled because the standard magnification of 0.82x has already been set.

If this flag does not exist, the standard scaling is reset at 8286, the value 82 is stored in the scaling register at 5287, and the rx
Set the o, 82J flag and turn on the Xo, 82 display lamp 118.

Thereafter, in step 5294, the value of the scaling register, that is, 82, is displayed on the scaling ratio display 114.

In the input reading at S16, when the operation of the Xo and 71 keys 119 is read, it is detected at 5288.

5289 to key rKEYJ with or without flag, Xo,
If the rising edge of the key operation of the 71 key 119 is read, the rKEYJ flag is set in 5290.

Check the presence or absence of rxQ and 71J flags on 5291,
If this flag is present, the standard magnification of 0.71x has already been set, so the new operation of the Xo and 71 keys 119 is canceled.

If this flag does not exist, the standard scaling is reset in 5292, the value 71 is stored in the scaling register in 5293, and the rx
Set the Q, 71J flag and turn on the Xo, 71 display lamp 120.

Thereafter, in step 5294, the value of the scaling register, that is, 71, is displayed on the scaling ratio display 114.

In this way, the magnification ratio is set corresponding to the value of the magnification register, so if you press the reduction key 111 to change the magnification ratio set in the standard magnification
Alternatively, fine adjustment can be made using the enlargement key 112.

See Figure 5Q.

By reading the input of S16, ADF/5ADF key 121
When the operation is read, it is detected in 5295.

Check whether the rKEYJ flag is present on 5296, and use ADF.
/5 If the rising edge of the key operation of the ADF key 121 is read, the rKEYJ flag is set in 5297.

The presence or absence of the rADFJ flag is checked at 5298, and if this flag is not present, this is an instruction to set the ADF mode, so the rADFJ flag is set at 5299, the ADF display lamp 122 is turned on, and the 5ADF display lamp 123 is turned off.

Check the presence or absence of the rADll flag in 5298, and if this flag is present, it is an instruction to set the 5ADF mode, so
At 5300, the rADFJ flag is reset, the ADF display lamp 122 is turned off, and the 5ADF display lamp 123 is turned on.

When reading input at S16, sort/stack key 124
When the operation is read, it is detected in 5301.

In step 5302, the presence or absence of the rKEYJ flag is checked, and if the rise of the key operation of the sort/stack key 124 is read, the rKEYJ flag is set in step 5303.

In step 5304, check whether there is a "sort" flag, and if this flag is not present, it is an instruction to set the sort mode, so
At step 5305, the "sort" flag is set, the sort indicator lamp 125 is turned on, and the stack indicator lamp 126 is turned off.

Check whether the "sort" flag is present in 5304, and if this flag is present, it is an instruction to set the stack mode, so
At 5306, the "sort" flag is reset, the sort display lamp 125 is turned off, and the stack display lamp 126 is turned on.

When all the keys on the operation board are not operated,
In 8307 of the flow shown in the Q diagram, the "rKEY" flag, "
Reset the "dark" flag, "light" flag, "enlarge" flag, and "shrink" flag.

5307 and 5308 constitute a loop for controlling the position of the condenser lens 7. In other words, when the target position of the condenser lens 7 corresponding to the value of the variable magnification register does not match the current position of the condenser lens 7, control is required and the condenser lens 7 is driven along the optical axis. The variable power motor (not shown) is energized in forward and reverse directions. If these match, exit this loop.

At 5310, the variable power motor is deenergized.

When the mode clear key 72 is operated, all the copy conditions set as described above are canceled and the standard mode is set in response to the operation of each key provided on the operation board.

Operation of the mode clear key 72 is detected at 332 in the flow shown in FIG. 2b. At step 333, the presence or absence of the "rKEY" flag is checked, and if the rising edge of the key operation of the mode clear key 72 is read, the rKEYJ flag is set at step S34, and the standard mode is set at step 35. In this case, set the number of sheets to 1 (set counter ← 1); automatic density adjustment mode setting ("auto" flag set); density center (6 degrees and register ← 4); 1st stage paper feed tray setting (paper feed Machine counter ← 1); Magnification ratio equal to magnification (variable magnification register ← 100)
;ADF mode setting (rADFJ flag set); and sort mode setting (``sort'' flag set); copy conditions are set, and flags related to these copy conditions and all flags other than the ``rKEY'' flag are reset.

At this time, if the display is changed as necessary and the magnification is changed, in the loop of 5312 and 5313 of the flow shown in Fig. 5Q, the condenser lens 7 is
The condenser lens 7 is positioned at the home position by performing position control.

Referring again to Figure 5a.

In the above loop for setting copy conditions, the readiness of the copying device is monitored in step 313 for each loop. Here, whether or not the copying apparatus is ready for operation is determined based on the temperature rise of the fixing unit 32 and the presence/absence of recording paper in the paper feed system being set.

If the operation preparation is not completed, proceed to S15.

The "red" lamp provided behind the print key 88 is turned on, and the copy-prohibited indicator lamp 108 is turned on to display ``Please wait.''. At this time, the "green" lamp and copy permission indicator lamp 107 provided behind the print key 88 are turned off.

When the operation power increase is completed, in S14, the "green" lamp provided behind the print key 88 is turned on, and the copy permission indicator lamp 107 is turned on to display <Copy possible>. At this time, the "red" lamp provided behind the print key 88 and the copy prohibition indicator lamp 108 are turned off.

See Figure 5b.

When the print key 88 is operated upon reading the 5160 input, it is detected in S17. At this time, the copying machine
If it is not ready, this key operation is canceled in S18.

If the copying device is Ready, then in S19 the Ready status is reset in the same way as above, and the "shift" flag for carry in the set register is also reset.

Although not shown in the figure, if the document sensor of the ADF device 2 detects the presence of a document, the operation of the print key 88 becomes an ADF start instruction, and an interrupt process causes the ADF to start.
The document in the F device 2 is loaded and control is executed. When the ADF device 2 completes setting the original at the predetermined position, it returns to this step and starts the copying process described above.

If the end cycle is in progress in S20, the start cycle in S21 is omitted, but otherwise it is executed.

In one copy cycle of S22, copy processing is performed according to the set copy conditions based on the state of each flag, the value of the register, etc. Each time one copy is completed and one copy cycle of S22 is exited, the number of copies is calculated. The count is incremented by one and displayed on the copy number display 95 (S23).

In S24, the same parts status reading process as described above (scanning the copying device's protection circuit, reading and displaying the detection mark of the paper feed cassette attached to each stage paper feed tray and the presence/absence of recording paper) is performed, and the abnormality is detected. If not, 32
At step 6, the key operation input is read by driver l (64) and buffer 1 (65). Here, when the C key 93 is operated, the value of the set register is set to 1 in S28.

S29→S24→S25→S26→S27→(S28)
→S29→S24→, etc. The loop is repeated until the repeat timing.

When the repeat timing comes, the number of copies is compared with the number of set copies (set register) in S30, and if the number of set copies exceeds the number of copies, the process returns to S22 and one copy cycle is executed again (repeat process).

If the set number of sheets is less than the number of copies in S30, S31
Set the end cycle with . Although not shown here, the presence or absence of the "double-sided" flag is checked, and if it is present, the presence or absence of the "back" flag is further checked.

If there is no "back" flag, the "back" flag is set, the number of copies is stored in the sector register, and the back side copy mode is set. In back side copy mode, S2
Automatically removes the intermediate tray 36 in one copy cycle of two.
Select.

If the "back" flag is present, it means the end of the back copy mode, that is, the end of the double-sided copy mode, so both the "back" flag and the "double-sided" flag are reset.

When the end cycle is set, the process returns to S7 again to end paper ejection (5io), and when the end timing is reached (311
), ends the end cycle and de-energizes the main motor, solenoid, etc.

Note that during this time, the aforementioned input reading and corresponding processing loop is configured, so if the print key 88 is operated during this time, the process advances from S20 to 322, and the start cycle is omitted.

In the above embodiment, an electrophotographic copying apparatus has been described, but for example, the image information of the original is processed to modulate the laser beam A○, thereby exposing the photoreceptor, developing it, and printing it on recording paper, etc. The same method can be applied to a hard copy device using a so-called laser printer, which transfers a visible image to a surface.

(Detailed explanation of the invention) According to the present invention, a copying apparatus having a manual density mode and an automatic density mode is provided with a storage means so that when the manual density mode is set,
When there is a write instruction, the recording density being set and the selection information specifying the manual density mode are written into the storage means; when there is a recall instruction, the recording density and selection information are read from the storage means, and the readout is performed. When the selection information specifies the manual density mode, the manual density mode is set at the readout recording density, so for example,
When the operator manually adjusts the density to obtain a special copy, if the operator inputs a write instruction with the settings made, the next time the operator wants to make a similar copy, all he has to do is issue an instruction to call it up. Therefore, it is possible to prevent the copying errors caused by creating a new test copy and readjusting the density, or by making a memory error on the part of the operator, and also to simplify the key operations since it is only necessary to perform key operations related to recall.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a schematic configuration of a copying apparatus according to an embodiment of the present invention. FIG. 2 is a block diagram showing a schematic configuration of a control system for the copying apparatus shown in FIG. 1. FIG. 3 is a plan view showing the appearance of the operation board of the copying machine shown in FIG. 1. FIG. 4a is a plan view showing size data, and FIG. 4b is a plan view showing address data. Figures 5a, 5b, 5c, 5d, 5e,
Figure 5f, Figure 5g, Figure 5h, Figure 51, Figure 5j,
5th and 5Q are flowcharts showing an outline of the control operation of the control system shown in FIG. 2. 1: Contact glass 2: Automatic document feeder/discharge device that also serves as a pressure plate 3: 1 light lamp 7: Condensing lens 4.5, 6.8: Mirror 9: Photosensitive drum 10: Charger 11: Developing unit 12: Transfer charger 13: Separation charger 14: Cleaning unit 15. 18, 21, 24, 27: Paper feed cassette 16.
19, 22, 25, 28, 38: Paper feed roller 17.20
,23,26,29,39,40,41,42,43,
44, 45, 46, 47, 48: Feed roller 30 Ni registration roller 31: Conveyance belt 32: Fixing unit 33: Switching claw 34: Paper ejection roller 35: Paper ejection tray
36: Intermediate tray 37: Right alignment roller 50, 62, 63: Microcomputer (copy control means. Automatic density setting means) 51: Decoder 52: Read-only memory 53
: Read/write memory (storage means) 54: Battery backup circuit 55: Power supply monitoring circuit 56: I10 device 57: Size detection sensor 58: Decoder driver 59: Motor & solenoid driver 60: Sensor unit 61: Latch circuit 64.66.
67: Driver 65: Buffer 70 Niprogram key 71 Niprogram mode display lamp 72: Mode clear key 76: Specified paper size display 77: Confirmation display lamp 88 Print key 89: Interrupt key 90: Interrupt display lamp 91: Numeric keypad 92: # key 70.91, 92: (second input means) 70.91
: (Third input means) 93: C key 94: Set number display 95:
Copy number display 96: Double-sided key 97: Double-sided display lamp 98: Front display lamp 99: Back display lamp 100: Abnormality display 101: Dark key 102 Light key 103: Auto key (first input means) 101.102: ( means concentration input means) 104:
Auto indicator lamp 105: Manual indicator lamp 106: Paper end indicator 107: Copy possible indicator lamp 108: Copy not possible indicator lamp 109: Paper key 110: Paper size indicator 11
1: Reduction key 112: Enlargement key 113: Same size key 114: Magnification ratio display 115: X 1.15
Key 116: Xl, 15 Indicator lamp 117: X
o, 82 key 118: Xo, 82 display lamp 11
9: Xo, 71 key 120: Xo, 71 display lamp 121: ADF/S ADF key 12
2: ADF display lamp 123: 5 ADF display lamp 124: Sort/stack key 125: Sort display lamp 126: Stack display lamp BT: Battery Bat,: Warning display No. 5
f■

Claims (3)

[Claims] (1) Manual density input means for inputting the recording density, which is manually operated; Automatic density setting means for automatically detecting the density of the original and setting the recording density; Selecting either the manual density mode or the automatic density mode A first input means for inputting selection information to be specified; a storage means; a second input means for inputting a write instruction; a third input means for inputting a recall instruction; and a manual concentration mode from the first input means. If there is selection information specifying , the manual density mode is set to execute the copying process with the recording density input from the manual density input means; if there is selection information specifying the automatic density mode from the first input means, Sets an automatic density mode in which the copying process is executed at the recording density set by the automatic density setting means; When a writing instruction is received from the second input means, at least the recording being set is writing the density and selection information specifying the manual density mode into the storage means; when the automatic density mode is set, writing at least the selection information specifying the automatic density mode into the storage means; calling the third input means; When instructed, from memory means,
At least read the recording density and selection information,
When the readout selection information is selection information specifying a manual density mode, a manual density mode is set to execute the copying process at the readout recording density; when the readout selection information is selection information specifying an automatic density mode, A copying apparatus comprising: a copy control means for setting the automatic density mode. (2) The copying apparatus according to claim (1), wherein the storage means is a readable/writable nonvolatile memory means. (3) When the recording density is input from the manual density input means while the automatic density mode is set, the copying control means cancels the automatic density mode and executes the copying process at the input recording density. The copying apparatus according to claim 1, wherein a manual density mode is set.