JPH01217372A - Color copying machine - Google Patents

Abstract

PURPOSE:To easily and inexpensively obtain colored copies by providing a developing system switching device and using bar codes written erasably on the back of an original as color identifying marks. CONSTITUTION:To obtain a three-colored synthesized copy from three originals 4a-4c, they are overlapped, set and inserted into the position of an original 4, that is, an original insertion port 35. When a start button is depressed, an original identifying sensor 31 identifies the color identifying mark 32a on the back of the original 4a which is fed toward a conveying belt 41 by a feeding roll 40. According to the identifying signals, a developing system selecting device selects any developing system in a rotary developing device 16, and the instruction is sent to the rotating position switching device of the rotary developing device 16 to switch its rotating position. The color identifying marks 32a-32c are formed with bar codes written erasably with a marker, for example, a pencil. Thus, color specification is simplified, and colored copies can be obtained with a low cost.

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a color copying machine, and more particularly to a color copying machine that can be applied to a copying machine equipped with an automatic document feeder (hereinafter referred to as A, DF). be.

(Prior Art) There is a copying machine that prints a color identification mark on a document and makes a color copy of the color specified by the mark.

In addition, in the method of using stickers as color identification marks, it is difficult to change the color after the fact because the stickers are affixed to the manuscript, and they must be kept as consumables, which is problematic in terms of cost. .

(Objective) Accordingly, an object of the present invention is to provide a color copying machine that allows color specification to be made easily and that allows color copies to be obtained at low cost.

(Structure) In order to achieve the above object, the present invention includes a plurality of developing units arranged in a machine, a document identification sensor that identifies a color identification mark provided on a document by using the movement of the document, and a document identification sensor that identifies a color identification mark provided on a document by using the movement of the document. a developing device selection device that selects one of the developing devices based on a signal identified by an identification sensor; and a developing device switching device that switches the selected developing device to a use position based on a command from the developing device selection device. The present invention is characterized in that a bar code erasably written on the back side of the document is used as the color identification mark.

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

FIG. 1 shows an embodiment of a copying machine according to the present invention, in which reference numeral 1 is a machine body, reference numeral 2 is a contact glass attached to the upper surface of the machine body 1, and reference numeral 3 is a contact glass set on the contact glass 2. A halogen lamp, reference numeral 5, that irradiates light onto the original 4.
6, 7, 8, 9, 10 are first, second, . Third
, a fourth, a fifth, and a sixth mirror, 13 is a reflection plate of the halogen lamp 3, 14 is a through lens disposed between the third mirror 7 and the fourth mirror 8, and 15 is the photoreceptor. an eraser for erasing non-images on 12, reference numeral 16;
17 is a rotary developing device which brings toner into contact with the electrostatic latent image formed on the photoreceptor 12 after erasing to form a visible image;
Reference numeral 18 indicates a pre-transfer static elimination lamp, and reference numeral 18 indicates a transfer charger, which transfers the visible image on the photoreceptor 12 onto the copy paper 21 fed from the tray 19 by the paper feed roller 20 and positioned by the lens 1 to the roller 36, and the reference numeral 22 23 is a separation charger that separates the copy paper 21 onto which the visible image has been transferred from the photoreceptor 12, and 23 is a conveyor belt that transports the copy paper 21 separated by the transfer charger 22 to the fixing device 24.
Reference numeral 25 indicates a combination conveyance path for returning the copy paper 21 that has passed through the fixing device 24 during color composition to the transfer charger 18, reference numeral 26 indicates a paper ejection path, and reference numeral 27 indicates a transfer path after the copy paper 21 is separated by the separation charger 22. Cleaning unit for removing toner remaining on the photoreceptor 12, code 2
Reference numeral 8 represents a static elimination lamp for erasing residual charge on the photoreceptor 12, and reference numeral 29 represents a toner concentration control sensor.

The rotary developing device 16 includes a plurality of developing devices each containing different color 1 to toner. In this example, there are three developing devices 16.
A, 16b, and 1[ic are combined to form an integral cylindrical structure, and one of the developing devices 1.6a, 16b, or 16c is brought close to the surface of the photoreceptor 12 by driving a rotational position switching device (not shown). Its rotational position can be switched so as to

Next, an ADF 34 is mounted on the upper surface of the aircraft body 1. A document identification sensor 31 for identifying a color identification mark (described later) provided on the back side of the document 4 is built in the upper position of the document entrance 35 in this F34. The rotary position switching device l (switching drive) is provided with a developing device selection device (not shown) that selects a developing device to be used in the rotary developing device 16 based on the identified signal. Configure the command to be sent.

Therefore, in this example, when composing three types of originals, for example, as shown in FIGS. 2(A), 2(B), and 2C, the Fi
) have color identification marks 32a and 32b, respectively.

Using originals 4a, 4b, 4c provided with 32c, these originals 4a, 4b, 4. Document areas 33a, 33b, and 33c, each of which becomes an image, are defined on the surface of document c to make a copy.

Now, three originals as shown in Figure 2 (A), (B), and (C) □
When it is desired to obtain a three-color composite copy from the originals 4a, 4b, and 4c, these originals are stacked and inserted at the position of the original 4 in FIG. 1, that is, at the original entrance 35.

After that, press the start button. Then, while the document 4a is being sent out toward the conveyor belt 41 by the feed roller 40, the document identification sensor 31 identifies the color identification mark 32a on the back side of the document 4a, and based on this identification signal, the developing device selection device rotates @ One of the developing devices of the imager 16 is selected, and a command from the developing device selection device is sent to the rotational position switching device of the rotary developing device 16.
6 rotational positions are switched. That is, a developing device, for example 16a, corresponding to the color identification mark 32a of the original 4a
is placed in close proximity to photoreceptor 2.

On the other hand, by operating the star 1- button, the reflected light from the halogen lamp 3 is guided to the photoreceptor 12, and the copy paper 21 in the tray 19 is fed to the registration roller 36 by the paper feed roller 2o.

In this state, when the reflected light from the halogen lamp 3 is guided to the photoreceptor 12 charged by the charger 3 as described in 1, the original area 33 on the front surface of the original 4a
a is exposed on the photoreceptor 12 to form an electrostatic latent image, and the toner in the developer +6a comes into contact with this electrostatic latent image to form a visible image. Subsequently, this visible image is transferred to the surface of the copy paper 2 by the transfer charger 18, and the copy paper 21 to which the visible image has been transferred is transferred to the separation charger 22.
The image is separated from the photoreceptor 12 by the conveyor bells 1 to 23, and sent to the fixing device 24 to be fixed. That is, a copy of the first color is made on the copy paper 21.

Thereafter, the copy paper 21 is conveyed to the registration rollers 36 by the composite conveyance path 25, and is put on standby here.

The time point when the registration roller 36 is reached in the above is detected by an appropriate sensor, and based on the detection signal, the second document 4. After the IJ is sent out, the original identification sensor 31 identifies the color identification mark 32b of the original 4b as in the case of the first original 4a, and based on the identification signal, the rotary developing device 16 performs the corresponding development. container, for example, developing device 16b
Its position is changed so as to bring it close to the photoreceptor 12, and then an electrostatic latent image is similarly formed in the development area 33b of the second document 4b by the toner of the imager 1.6b. The second color copy is composited onto the surface of the copy paper 21 that has been on standby.The copy paper 21 with the second color copy composited thereon is again conveyed to the registration rollers 36 through the composite conveyance path 25. ,stand by.

Then, the arrival at the registration roller 36 is detected by the sensor as in the previous case, and based on the detection signal, the third
The third original 4c is sent out, and the color identification mark 33c of the third original 4c is identified by the original identification sensor 3 in the same way as above, and the position of the developing device 16c of the rotary developing device j6 is moved close to the photoreceptor 12. The electrostatic latent image formed by the toner in the developing device 16c is transferred to the waiting copy paper 2.
A third color copy is synthesized by being transferred to the surface of J and fixed.

Therefore, on the surface of the copy paper 21, each image (image area 33
a, 33b, and 33c are copied as a three-color composite image 33. After fixing, the copy paper 21 is now combined conveyed +! by operating the claw 42! ! The paper is discharged to the paper discharge tray 26 without passing through 425.

”The operation of the two claws [JFor example, the number of originals constituting one set specified in advance and the number of copy paper sheets [-Roller 3]
6. "- This is done by comparing each of the 81 numerical values of the number of returns.

By the way, the color identification mark explained with reference to FIG. 2 is specifically formed with an erasable marker, such as a bar code written with a pencil, as shown in FIG.

For example, the specified color for document 4a corresponds to black with one bar, red corresponds to document 11) with two bars, and blue corresponds to document 4c with three bars. I can do it.

By forming such a color identification mark, there is no need for a special item such as a sticker as in the past, and the mark can be made with a hand-held pencil or the like, and the color can be easily changed.

Next, the basic flowchart for clicking the color copy button.
Another embodiment will be described with reference to FIG. 5 showing -.

In this example, whether or not to automatically select colors using barcodes to obtain color copies is an optional mode, and will only be executed when automatic selection is specified using the designated key provided on the operation panel. It has become.

Therefore, if automatic selection is not selected, a normal copy operation is executed.

If you set the color to automatic selection and set the original in A or D F, the start button will light green, so you can select the start button.
When you press the button, the barcode on the back of the document is read,
The developing color currently facing the photoreceptor and the color specified by the barcode 1 related to the reading are compared, and if they do not match, the rotary developing device 16 is rotated until they match, and if they match, the color is changed by starting copying. Make a copy at 2.

. At that time, if no barcode is written or if 4 or more barcodes are read, the development color confirmation lamp will flash as a warning, and after selecting and confirming the development color manually, the copy will be set to Star 1. make ~

A system for executing the control according to the above flowchart is shown in FIG. 6, for example.

In the figure, "developing device drive section J is a device section that provides driving force when switching the rotational position of the rotary developing device 16,"
"Developer sensor" refers to each developer 16a.

This is a sensor for identifying which of the photoreceptors 16b and 16c is facing the photoreceptor 12.

As described above, if the color of the developing device based on the detection signal from this sensor does not match the color associated with the reading of the bar code, the rotary developing device 16 is driven until the color matches.

According to this example, the color of the copy can be specified by simply marking the back side of the document with a bar code, and the color can be easily changed because it can be easily erased.

(Effects) According to the present invention, color copies can be easily obtained at a low cost of 1 or more, which is convenient.

[Brief Description of the Drawings] Fig. 1 is a schematic side view showing an embodiment of a copying machine suitable for carrying out the present invention, Figs. 2 and 4 are explanatory diagrams of an original for color composite copying; FIG. 3 is an explanatory diagram of a copy sheet showing a state in which a composite copy has been made, FIG. 5 is a flowchart illustrating an embodiment of the present invention, and FIG. 6 is a system block diagram suitable for carrying out the present invention. 31... Original identification sensor, 32a, 32b,'
32c...Color identification mark.

Claims (1)

[Claims] A copying machine that makes color copies from originals fed by an automatic document feeder, which utilizes a plurality of developing devices arranged inside the machine and color identification marks provided on the originals as the originals move. a developer selecting device that selects one of the developing devices based on a signal identified by the document identifying sensor; and a developing device selecting device that selects one of the developing devices based on a signal identified by the document identifying sensor; 1. A color copying machine, comprising: a developing unit switching device for switching a developing unit to a use position; and using a bar code eraseably written on the back side of a document as the color identification mark.