JPS60156077A - Copying apparatus - Google Patents

Abstract

PURPOSE:To save a mode designation time for the next copying and to enhance the speed of copying operation by designating an exposure mode while preceding copying is being executed. CONSTITUTION:An exposure mode is designated by operating a key on an operation panel. A 3 primary color superposing copy can be executed with a Full key, a 2-color copy, such as red-black copy, with TWO key, a black single color copy with a BK key, and each of single color copy of yellow, magenta, cyan, purple, green, and red can be carried out with each of Y.M.C.V.G, and R keys. Since these color designation operations require a long time, color designation for the next original is made possible while the copying operation of a preceding original is being executed.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a copying apparatus that forms an original image on a recording medium.

<Prior art> In a color copying machine using electrophotography, colors are usually obtained by combining several types of color separation filters for color-separating a color original and a developer containing several types of color pigments. . For example, a color separation filter (hereinafter referred to as B), a color separation filter (hereinafter referred to as G), and a red filter (hereinafter referred to as R) are used, and the developer is a yellow color (hereinafter referred to as R). Magenta (hereinafter referred to as M) and cyan (hereinafter referred to as C) developers are used. Normally, in order to obtain a copy that reproduces a color original as it is (referred to as full color mode), 1. Using a blue filter on the photosensitive layer, the color original is color-separated and exposed to produce Y and colors (including Y). 2. Create a latent image of M and M-containing colors (red and blue), develop it with a Y developer, transfer it to paper, and then expose it to color separation using a green filter. Create a latent image, develop it with M developer, transfer it to paper, then 3. Perform color separation exposure using a red filter to create a latent image of C and colors containing C (green and blue), Develop with developer and transfer to paper.

In this way, the Y, M, and C images are successively transferred onto paper, and a copy is obtained by thermally fixing the images.

However, it takes time to process an original to reproduce the original in about two colors using the steps described above to faithfully reproduce the original. On the other hand, even if it were possible to manually select the combination of developer and filter, it is unclear whether it would be possible to faithfully reproduce the original, or which colors of the original would change in what way. darn.

This is because setting the exposure mode, such as selecting a color filter, takes some time.

It takes time to start the next copy operation.

Purpose of the present invention In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a copying apparatus that allows the exposure mode for copying to be set during the previous copying operation, thereby making it possible to start the copying operation earlier. The purpose is

<Example> This will be explained below with reference to the drawings.

FIG. 1 is a general perspective view of a color copying machine, and in the figure lO
11 is a copying machine main body, 11 is a display unit for copying operations, 12 is a color converter for changing a specific original color to a desired color, 13 is a color conversion instruction unit, and 14 is an original stand.

Reference numeral 11 is equipped with a key for specifying a predetermined program mode of full color mode, two-color mode, and one-color mode, a copy start button, and a sheet setting key.

FIG. 2 is a cross-sectional view of the inside of FIG. 1, and 20 is a photosensitive drum that rotates in the direction of the arrow. 21 is an exposure lamp, 22
23 is a moving mirror, 23 is a lens system, 24 is a fixed mirror, 2
5 is a filter, 4 pieces (7) filters 25a, 25b, 2
5c and 25d can be replaced. 26 is a temporary charger, 2
7 is a simultaneous static eliminator, 28 is a full exposure lamp, 29 is a Y developer, 30 is an M developer, 31 is a C developer, 32 is a BK developer, 33 is a pre-transfer charger, 34 is an insulating drum, 35 is a cassette, 36 is a supply l.

Paper roller, 37 is a feed roller, 38 is a timing roller, 39 is a paper path, 40 is a transfer charger, 41 is a separation claw,
42 is a belt, 43 is a fixing roller, 44 is a tray, 45
is a cleaner.

First, the operation will be explained in the case of full color.

When the copy button 50 (FIG. 3) is pressed, the main motor is activated, various chargers and the exposure lamp 21 are turned on, and the photosensitive drum 20 and transfer drum 34 begin to rotate. Photosensitive drum 20
is positively charged by the primary charger. Transfer drum 34
When the forward idle rotation for two revolutions is performed, the copy paper P is fed from the cassette 35 by the paper feed roller 37.

On the other hand, the exposure lamp is turned on and the mirror 22 and lamp 21 are moved back and forth to scan the original for the first time.The image is exposed through the blue color separation filter 25a, and at the same time, AC charge removal is performed, and a yellow static image is printed on the photosensitive plate. An electric latent image is created and the contrast of the latent image is increased by the lamp 28. Then, it is developed using a Y developing device No. 29 to obtain a yellow visible image.

The fed paper is then fed by a timing roller 38 in synchronization with the drum, and the yellow image is transferred at the transfer section.

It is wrapped onto the transfer drum 34 by a gripper. Toner on the photosensitive drum 20 is removed by a cleaner 45. The mirror and lamp have moved back and are in their original positions.

Next, when the same original is scanned a second time, the color separation filter changes to green 25b, and a magenta electrostatic latent image is created on the photosensitive plate in the same manner as described above. This is converted into a magenta visible image using 30 developing devices. This magenta image is again superimposed on the yellow image on the paper wound on the transfer drum 34.

When entering the third scan, the color separation filter is red 25c.
Create an electrostatic latent image of Lithian on the photosensitive drum, and
A cyan visible image is created by the developing unit 1, and then transferred to the transfer drum 34.
Place it on top of the copy paper again.

After the three colors are superimposed, the separation claw 41 is operated to separate the copy paper on the transfer drum. The copy paper separated from the transfer drum is sent to a fixing device 43 by a belt 42, and after being fixed, is discharged to a copying machine tray 44 by a discharge roller.

In the case of two-color copying, copying is completed in the same manner through the above process for the two selected colors.

The recovery from the start of scanning is completed in one revolution of the photosensitive drum. A latent image is formed around half the circumference of the photoreceptor. One revolution of the insulating drum corresponds to approximately half the revolution.

Next, in the case of monochrome copying, for example yellow copying, when the copy button 50 is pressed, the copy paper is immediately fed, and the exposure lamp charger is also activated at the same time to scan the original.

At this time, an ND filter 25d is prepared as a color separation filter. Therefore, an electrostatic latent image similar to that of a black-and-white copy is obtained on the photosensitive drum 20, but since the developer is 29 yellow, the visible image is yellow. This is transferred onto copy paper on a transfer drum, separated from the transfer drum by a separating claw, and discharged after being fixed.

The color modes of this apparatus include a specific two-color mode and a one-color mode in which copy cycles (photosensitive drum rotations) are completed twice or once in addition to the aforementioned full color mode.

First, select the G filter 25b to expose the image, select the M developer to develop and transfer the toner image, and in the next process select the R filter 25c to perform BK development (black color) and perform the first image on the transfer drum. When transferred to an image, the original black can be reproduced as black, and the red can be reproduced as magenta (red).

Therefore, in the case of original books with two colors, red and black, such as ledgers, this two mode is sufficient to achieve the purpose and is fast.

Also, if the original is one color, for example black, ND
Since the image can be reproduced sufficiently by exposing it through a filter (a filter for reducing the amount of light) and then developing it with a BK developer, one copy cycle is required.

In this embodiment, these color modes can be selected in advance by one key designation.

51 in Fig. 3 is the operating unit for this purpose, FuL.

The L key is full mode, and the TWO key is two color mode.

The other keys are used to reproduce one color according to the symbol.

Table 1 shows the combinations of filters and developers in these specific modes. ■ indicates reproduction of a single color of purple.

In FIG. 3, numeral 52 is a copy number designation key, 53 is its display, 54 is a cassette selection key, 55 is a selected cassette size, and 56 is a selected color mode display.

FIG. 4 shows the color conversion designation section 13. 61 is seven keys for specifying a specific color of the original, 62 is 14 keys for specifying the desired color to be converted, 63 is a display for indicating that conversion is possible at the intersection of 61 and 62, 64 is a selection key to select whether to perform color conversion using these or color reproduction using the main body mode key shown in Figure 3, 65 is 61°62
An end key 66 is used to input the end of the color conversion designation, and a key 66 is used to clear the designation input when a mistake is made in the color conversion designation.

In FIG. 4, the black portion of the display 43 shows the converted original color and the converted color.

Note that the converted colors MMY, etc. indicate intermediate tones of M and Y.

The details will be described later.

Table 1 The color conversion specifying section 13 specifies how to use the combination of color separation filter and developer to convert one specific color of the original into the desired color by copying (for example, changing the red part of the original to blue). In addition to displaying what other colors other than those specified in the original will be when copied, it is also possible to convert not only one color of the original but also multiple colors to the desired color ( For example, if you specify something (red → blue Y → green), if this specification is possible by the combination of color separation filter and developer, the specified color will be displayed as well as the number of colors other than the specified color. If this is not possible, I would like to distinguish this and display it, and furthermore, I would like to copy only a certain color in the original (for example, if the M of the original
It is possible to determine the combination of a color separation filter and developer (such as converting only one color to a white background and converting other colors), and display how many other colors will be converted and S converted when that is specified. The color conversion method will be briefly described below.

Color reproduction using the subtractive color method is based on developers Y, M, and C, and by mixing these colors, red (a mixture of Y and M), green (
The standard colors of blue (mixture of Y and C), blue (mixture of M and C), and black (mixture of Y, M, and C) are obtained, and the hue changes depending on the color mixture ratio.

The color with the addition of Y (orenshiri) is changed to YYM or the standard o red (the color with the addition of M (... Beni Q is the YYM standard, 7) 4
．． 4 change, (Y'1r-jJ(IyC-tairohijo $1 the color with YYcC added (//none to ycc C the color j change to MCC standard 0 blue 1)
3 (color with M added (... flag) is called MCC.

Next, select M, R, Y, C, G, and V as the original colors.

The table below shows the cases in which a latent image is formed on the photosensitive layer when Bk is used for color separation exposure using a color separation filter.

In other words, in this table, color conversion is possible if the areas where a latent image is formed are developed with an appropriate developer, and the areas where a latent image is not formed are in a "no color" state, that is, they are not copied.One color of the original. If we take an example of converting , it will look like the table below.

Examples 1-4 show the conversion to RG. As can be seen from the table, the conversion is the same even if the combination of filter and developing color changes. Example 5 is R to ■, Example 6 is R to C1, Example 7 is R
to Ml(, Example 8 is the conversion from Bk to R.

Next, when we examine how the colors of other documents change when a specific color of the document is converted to the corresponding color, we examine the conversion from R to G and see the table below. X is no color.

First example of R-G The R-G conversion achieves its purpose with only the first and second steps described above, but even if the third step is color separation exposure and development using a red filter. Since it is not related to R-G conversion, adding this will yield even more various conversion color combinations as shown in the table below.

In view of the above points, the present invention constructs a display device for color conversion as shown in FIG.

(A) Original color specification buttons (M, R, Y, G.

C, V, Bk selection buttons) and conversion color specification buttons (M, MMY, R, \YY, Y, G.

(YCC, C, V, CMM, Bk selection buttons) and "remove color", which means no color is added.
Buttons called "NON" are arranged in a matrix, and display means (light-emitting diodes) are arranged at the intersections.

(B) In order to convert one of the colors in the original to the corresponding color, when the corresponding designation button on the original and the corresponding designation button for the conversion color are pressed, the display means at the intersection of ~ lights up, and Displays all the conversion colors that can be used to convert unspecified original colors.

At this time, if there is "no color", the NON part will also light up.

For example, if you specify the R-G conversion first, the R-G in Figure 2
Colors other than R are converted by combinations of various convertible color separation filters and development colors, such as M-+G,
C, Y, X, Y-G, X, Y, C, G-G, X, Y, C
,YYC.

Bk, YCC, M, R,, V, C+X, Y, M.

C, V-+X, G, C, Y, M, YCC, Bk.

YYC, V, R, Bk-+G, YYC, Bk.

Display all YCCs.

(C') If you specify the first color conversion (state (B)) and further specify the second color conversion within the displayed conversion color range, the first and second specified locations will be changed. The first color will be displayed, and for other original colors outside the specified range, if the first and second conversions are satisfied, all converted colors that can be converted by the combination of color separation filter and developing color will be displayed. do.

For example, the first transformation is R+G, the second transformation is G
-+Y, first specify the conversion of l'l+Q, and then
The display shown in the figure appears, and then when you specify G→Y, M-+C, G except for the specification.

Y-y, x, c-+x, y, v+c, yyc.

Display G, Bk-G, YYC.

CD) Conversion specification is performed in the same way one after another, and when one display is finally made for each "row" (each original color), the conversion specification ends and the combination of color separation filter and developed color at that time is displayed. do.

(E) For each conversion specification, when the END key is turned on to end the specification, one combination of color separation filters and developing colors that satisfies the conversion specification is arbitrarily selected and displayed.

This function is extremely useful when there are only a few colors in the document, such as one or two colors, or when it is only necessary to convert one color.

When "NON" is specified, the color of the document is copied in a "non-colored" state. In other words, since that part normally remains white, it can be colored separately.

For example, when R+G is specified as the first priority, C can only be converted into Y, M, and C as a color.

However, if you want to set it to R or G, it becomes a problem. At this time C
Specify ANON to make part C “uncolored”
It will be possible to copy the car in its current state and then paint it the desired color later.

FIG. 5 is an example of a control circuit for color mode selection and color conversion in this embodiment.

In the figure, 51 is a switch corresponding to the color mode designation key 51, which opens when the key is turned on. Reference numeral 61 indicates seven switches corresponding to the original color designation keys of the converter, and reference numeral 62 indicates switches corresponding to conversion color keys, all of which are closed when the keys are turned on.

CPB is a signal caused by turning on the copy button 50, and I
R is a reset signal for the circuit and is obtained by a pulse generated by the capacitor 70 when power is turned on or by turning on the clear key 66. A/M is a changeover switch between color mode selection on the main unit and color conversion specification on the color converter.When the contact is in a, the former is selected, and the
The latter purpose is achieved when m. CMC is a copy operation in progress signal, which is obtained when a process is being executed.

END is obtained by turning on the end key 65 [This signal indicates the end of conversion.

Reference numeral 71 denotes a color mode circuit which selects a combination of filter and developer according to the mode using the color mode key 51 and outputs it in a binary decimal code, and the details are shown in FIG.

72.73 is conversion key 62, original color key 62
A key input circuit 75 outputs 1 and 0 signals to the color conversion circuit 74, and a display circuit 75 displays convertible original colors on the display 43 of FIG.

Note that the internal parts of the key input circuit, color conversion circuit, and display circuit are omitted. For details, please refer to the patent application No. 52-60163 by Mizude-jin.
It is clear from the specification of "No. R Color Conversion Display Apparatus".

Each circuit 71, 72 outputs three 4-bit filter developer combination signals. An output called P-1 is a combination signal necessary for the first rotation of the photosensitive drum, and when the circuit 71 is in full color mode, all output terminals output signals corresponding to O1, that is, the set of Y-B. An output called P-2 is an output of 0110 and 1010 during the second rotation of the photosensitive drum, and an output called P-3 is output during the third rotation of the photosensitive drum. P-
1, P-2, and P-3 are the same in the circuit 74, and when the keys 61 and 62 are used to command to convert the original R to G, Y to C, and G to V, as P-1. Outputs of the filter developer set B-C, G-Y as P-2, and RM as P-3 are output. That's 2,4.9
This is the binary coded output of The filter developer combinations follow the numerical codes in Table 2.

Table 2: The developer circuit 76 has the function of receiving code signals P-1, P-2, and P-3 every rotation of the photosensitive drum, and thereby switching and driving the specified developer and filter. It is also a machine circuit having the function of starting rotation of the photosensitive drum and exposure of the original in response to the copy start signal C3T.

Explain the operation of the circuit. Assume that the A/M switch is now set to the a side. If there is no copy operation signal CMC, the flip-flop (gate Q12) is activated by the output of the NAND game) Q14.
．． (consisting of Q13) is set, and the C terminal becomes an H state at TTL level. Therefore, since that signal is input to one side of the anime Ql-99, turning off any of the keys 51 is accepted. Q9 when selecting full color mode
．． An H signal is input to the last input terminal of the circuit 71 via the OR gate QIO. It is determined that the output of the circuit 71 is in full color mode and 0. 5. to P-2. P
Output the code io to -3.

Further, since the C terminal output of the flip-flop is input to the AND gate Q23 via the OR gate Q21, when the copy button 50 is turned on, the H signal of CPB is input as C3T to the machine circuit 76 to start the process operation.

When the first rotation starts after a pre-rotation for photoreceptor cleaning, the B filter is set by the output of P-1, and then the developing device Y is set. Then, exposure scanning is started.

The timing is similar for P-2 and P-3.

The AND gates Ql-Q9 are connected to the color mode display through latch circuits (not shown), and the key 5
Lights up when 1 is turned on.

This latch circuit is set by a clear key 57 on the main body or by a signal (output of capacitor 70) when the power is turned on.

Game) The outputs from Ql to Q9 are latched by the circuit 71, so if you change the hair original after copying a predetermined number of copies and turn on the copy button again without turning on the key 51, copying will be performed according to the previous full color mode. . After the completion, when the clear key 57 is turned off and the BK key of the key 51 is turned on, P-1 is outputted by the output of the gate Q4, and copying in black and white mode is executed. In this BK' mode, input of P-2 and P-3 is prohibited.

When the A/M switch is switched to m after copying is completed, inverter Q18. The FFI is reset via the Nandt gate Q15, and the C terminal and d terminal outputs are set to 0.1. As a result, all of the elements 43 that enable the operation of the color conversion circuit 74 are lit. Then, when the original color R to be changed is specified using the key 61 and the conversion color G is specified using the key 62, a large number of sets including the set B-C of the filter developing device are selected by the circuit 74. Then, the display circuit 75 lights up the display 43 to indicate the possibility of the original color other than R changing.

Based on the display, when the key is specified again to change to Yt-C, the set of B-C is determined and the set including G-Y is selected. Similarly, if you specify to change G to V, G-Y, R-
The 0 indicator 43 where M is determined is R2O, Y-+C,,G
Only the nv intersection points are lit.

After that, when the END key 65 is turned on, flip-flop FF2 is set and its output is input to the circuit 74, P-1.
-P-3 outputs a set signal.

Incorrect key 61.62 specification or display! If the key corresponding to the unlit part of 43 is not turned on, the signal CPOK is 1, so the output of FF2 is the gate Q22.
．． It is input to Q23 via Q21.

Therefore, when the copy button is turned on, copying starts with the output of the signal C3T.

When the clear key 66 is turned on when it is desired to redo the color conversion, the reset signal IR is outputted by the Nantes gate Q16. As a result, the FF2 is reset and the state of the conversion circuit 74 is returned to its original state, and the display circuit lights up all of the indicators 43.

When the changeover switch A/M is changed from m to a, the conversion circuit 7
The selection mode by 4 is cleared, and the color mode of the main body is automatically set to the full mode via the differentiator circuit consisting of the capacitor C1, resistors R1 and R2, and the OR game) QlO. That is, a pulse is input to the circuit 71 when the output terminal d falls from 1 to 0. Therefore, when the copy button is turned on, C3T is generated from 923 and a full color mode copy operation is started.

Also, during the copy operation, change the A/M switch to m and use FFI.
(m terminal and Q13 of FFI
(input terminal connected) Color conversion can be specified even during copy operation. In other words, the specified developer and filter combination is memorized, and the next copy button transfers that combination to the machine circuit 7.
4.

Note that the keys other than the A/M switch are self-returning type, and return to their original positions when released. Further, the display 66 indicates that the mode has been switched to m by a signal from the FFI.

FIG. 6 shows the circuit 71 in FIG. 5, where FF3 is a flip-flop that latches the input from gate Q, and clear key 5
7. Reset when power is turned on. DECl, 2.3
80 to 82 are OR gates; 80 to 82 are OR gates; and 80 to 82 are OR gates.

Also, the signal generated by switching the A/M switch to m is equivalent to turning on the power to the circuit 74, and the signal E generated by the END key is equivalent to the key for displaying the combination of filter and developer.
K is a signal that detects that even one indicator 43 is on.

As described above, according to the present invention, the next exposure mode can be input during the previous copying operation, so there is no need to set the exposure mode after the previous copying operation is completed, and the next copying operation can be carried out smoothly. You can move to

[Brief explanation of drawings]

FIG. 1 is an external view of the color copying apparatus of this embodiment, FIG. 2 is a sectional view of FIG. , Figure 5 is an example of a circuit for switching between color mode specification and color conversion specification, and Figure 6 is circuit 7 in Figure 5.
Designation key showing 1, 56 is color mode indicator, 5o
is a copy button, 61 is an original color designation key, 62 is a conversion color designation key, and A/M is a changeover switch. Procedural amendment form) February 25, 1985 Manabu Shiga, Commissioner of the Patent Office 2, Name of invention copying device 3, Relationship with the person making the amendment case Patent applicant address 3-30 Shimomaruko, Ota-ku, Tokyo 2 names (100
) Canon Co., Ltd. Representative Ryu Kaku 3 Part 4, Agent address: 3-30-25 Shimomaruko, Ota-ku, Tokyo 148, Date of amendment order: January 29, 1985 (shipment date) 6. Maps subject to amendment (No change in content.)

Claims (1)

[Claims] Processing means having various exposure modes for exposing an original to form an image on a recording medium, an input means for inputting information for controlling the exposure mode, and a next operation of the processing means during the operation of the processing means. A copying apparatus comprising control means for permitting input of said information for.