JPH022146B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a copying machine, and particularly to a copying machine equipped with an overlay function. .

[Conventional technology]

In a conventional copying machine, for example, as shown in FIGS. 1 and 2, the document A is fixed with a document presser 3, and the document A is exposed with an exposure lamp (for example, a halogen lamp) 5. The reflected light from the original A is passed through a plurality of mirror lenses 6 to a recording medium (for example, a recording drum, master paper on the drum, etc.) 8
irradiate and copy original A'. On the other hand, after the recording drum 8 rotating in the direction of the arrow is charged with a (-) charge by the charger 7 to impart photosensitivity, the electrostatic latent image A' is transferred to the developing tank 9. The image ((-) charge) is developed by attaching (+) charge toner to the image ((-) charge). Then, the transfer drum 11
After the toner image on the recording medium 8 is transferred to the upper transfer paper, the negative charge is removed from the recording medium by a static eliminating charger 13, and the toner remaining on the recording medium 8 is removed by a cleaner brush 14. . The transfer paper is fed into the machine from the paper feed cassette 1 by the paper feed roller 15, and after being conveyed by the conveyance rollers 16 and 17, the transferred toner image is fused by the fixing device 12, and the transfer paper is is copy tray 2
sent to.

[Problem to be solved by the invention]

As described above, conventional copying machines usually only transfer a single original document, in which characters, symbols, and figures are written or printed on blank paper or in a predetermined format, onto transfer paper. In that case, when you want to add other content to a document that has a predetermined format, or when you want to replace only part of the document with different content, or when you want to make multiple copies of these overlaid documents. At times, the desired content is combined and edited manually to create a single manuscript before copying, which takes time and effort at the manuscript creation stage, and the quality of the copies is also poor. Ta.

The purpose of the present invention is to solve such problems, and when adding different content to a manuscript or replacing part of the content, it is possible to combine two or more manuscripts without manually editing the manuscript. It is an object of the present invention to provide a copying machine having an overlay function that enables overlaying of images on copying paper by setting the images as they are.

[Means to solve the problem]

In order to achieve the above object, the copying machine of the present invention has the following features:
Multiple document trays on which originals are placed, one automatic document feeder that feeds and ejects multiple documents to and from the document tray, and exposes the documents provided corresponding to each document tray. a plurality of copying means configured to form an electrostatic latent image on a recording medium, develop the latent image with toner, and transfer the toner image onto transfer paper; The automatic document feeder and ejector has a means for combining and copying a plurality of copy images onto the same transfer sheet by passing the image through a copying means, and the automatic document feeder and ejector feeds and outputs one sheet of document on one document table. After exposing and ejecting the original, the automatic document feeder and ejector itself moves to another document table, feeds another original, and exposes another original. The feature is that the paper is configured to be discharged later.

[Effect]

In the present invention, copying involves exposing a document to light to form an electrostatic latent image on a recording medium, attaching toner to the electrostatic latent image to form a toner image, and then transferring the toner image to transfer paper. In a machine, the automatic document feeder and ejector itself is moved to sequentially feed at least two types of documents, and the documents are ejected after exposure, thereby forming individual toner images on separate recording bodies. Then, the toner images are superimposed and transferred onto the same transfer paper.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 3 is a cross-sectional structural diagram of a copying machine with an overlay function showing an embodiment of the present invention, and FIG. 4 is an operation time chart of FIG. 3.

In FIG. 3, in order to overlay two documents A and B, two sets of recording drums 8,
8', developer tanks 9, 9', etc. and both recording drums 8,
8', a set of transfer belts 20 that reciprocate, and a set of automatic document feed/deliver devices (hereinafter referred to as ADF).
21 is provided.

The copying machine shown in FIG. 3 is also provided with a switch for switching between a normal copy mode and an overlay mode.

In normal copy mode, ADF21 is 1
After a sheet of original A is fed to the original table and exposed to light by the optical system, this original A is only ejected to the original tray 23 and no new original is fed from the hopper 22. In this case, only one recording drum 8 is used to form a toner image, and the transfer belt 20 is
The toner image is transferred onto the transfer paper 19 that has been conveyed. When the next document B is fed to the document table, a completely different document is to be copied onto another transfer sheet.

Next, in the case of overlay mode, when you want to add other content to original A in a predetermined format, or when you want to replace part of original A with different content, first create a blank sheet B of the same size as original A. After pasting the content you want to add or replace to the desired position, move the two documents A and B to the ADF21.
Load it onto Hoppa 22. In this case, manuscripts A and B
It doesn't matter which one is fed first.

The ADF 21 is configured to reciprocate above the two sets of recording drums 8 and 8', and when the copy button is pressed, it stops on the recording drum 8 and then moves back and forth over the recording drums 8 and 8'.
A document A is fed from the hopper 22 and set on the document table. The optical system scans the document A reset by the ADF 21 to form a latent image on the recording drum 8, and the developer tank 9 deposits (+) charged toner to form a toner image A'.

On the other hand, one sheet of transfer paper 19 is fed onto the transfer belt 20 by the feed roller 15 and the conveyance roller 16, and is conveyed in synchronization with the toner image A' on the recording drum 8.

The toner image A' on the recording drum 8 is transferred to the transfer paper 1.
A (-) charge is applied from the back side of the paper 9 by a transfer charger 18, so that the image is transferred to a transfer paper 19.

Next, the ADF 21 moves above the recording drum 8', and the transfer sheet 10 also moves below the recording drum 8' due to the movement of the transfer belt 20.

After the ADF 21 discharges the original A, when the original B is fed and set on the original table, the optical system scans and forms a latent image on the recording drum 8' in the same manner as before. The toner image B' formed by the developer tank 9' is transferred to the transfer paper 19 by applying a (-) charge to the transfer paper 19 directly under the recording drum 8' by the transfer charger 18'.
transcribed into.

As a result, each piece of information on the documents A and B is transferred onto the same transfer paper 19 in an overlapping manner.

The operation timing in this case is shown in FIG.

FIG. 4 a-1 to a-4 show the charge related to document A;
Timings of exposure, development and transfer, Figure 4b
-1 to b-4 are each timing of charging, exposure, development, and transfer regarding original B, Fig. 4 c-1 to c-
3 shows timings of document feeding, document ejection, and ADF movement regarding the ADF 21, respectively. As is clear from Fig. 4 c-1 to c-3, the ADF 21 operates in the following order: document A feed → A set → A discharge → ADF movement → document B feed → B set → B discharge → ADF movement. The various processes are carried out.
Note that the arrow c-3 indicates the direction of ADF movement.

Also, Figure 4 a-1 to a-4, b-1 to b-4
As shown in the figure, the timing of development, transfer, etc. of documents A and B is synchronized with the movement and rest of the ADF 21.

FIG. 5 is a cross-sectional structural diagram of a copying machine with an overlay function showing another embodiment of the present invention;
The figure is an operation timing chart of FIG. 5.

In FIG. 5, the same symbols as in FIG. 3 represent the same things. The structure in Figure 5 is ADF2
The structure differs from that shown in FIG. 3 in that the recording drum 1' continuously moves above the two recording drums 8, 8' and performs a return operation after completing a predetermined copying operation.

Each optical system 24, 24' is connected to the automatic document feeder and ejector 2.
1', by scanning the originals A and B, respectively, images of the originals A and B are transferred onto the rotating recording drums 8 and 8' to form latent images. The toner image is formed by the developer tanks 9 and 9'.
After the toner images A' and B' are formed, the toner images A' and B' are transferred to the transfer paper 19 conveyed by the transfer belt 20.
B' is transferred overlappingly.

The timing of feeding, discharging, and toner image transfer of documents A and B relative to the movement position of the ADF 21' is shown in FIG.

FIGS. 6 a-1 to a-4 show charging, exposure, development, and transfer timings for document A, and
Figures b-1 to b-4 show charging, exposure, development, and transfer timings for original B, and Figure 6c-
1 to c-3 indicate timings of document feeding, paper ejection, and ADF movement regarding the ADF 21', respectively. As is clear from Fig. 6 c-1 to c-3, the ADF 21' starts moving immediately after document A is fed, and stops before document B is ejected, while the ADF 21' Document B is fed immediately after the paper. The arrow indicates the direction of movement of ADF 21'.

In addition, in Figures 3 to 6, two types of manuscripts A and B are shown.
Although the case of stacking documents has been described, stacking three or more types of documents can also be realized by expanding the recording drum or the like. Additionally, since each recording drum is provided individually, if the toner color used in the development process is changed, two documents can be overlapped using those colors, and any part of the document can be emphasized. can.

〔Effect of the invention〕

As described above, according to the present invention, while moving the automatic document feeder and ejector, at least two
By feeding the originals in sequence and ejecting them after exposure, individual toner images are formed on separate recording media and transferred overlappingly onto the same transfer paper, making it extremely easy to overlay. function can be provided. As a result, there is no need to manually edit the manuscript, which saves time and effort. Also,
The toner color can be different for each recording medium,
Since it can be expressed using a predetermined color, overlays including color emphasis are possible.

[Brief explanation of drawings]

1 and 2 are an external view and a configuration diagram of a conventional copying machine, FIG. 3 is a cross-sectional structural diagram of a copying machine with an overlay function showing an embodiment of the present invention, and FIG. FIG. 5 is a cross-sectional structural diagram of a copying machine with an overlay function showing another embodiment of the present invention, and FIG. 6 is an operation time chart of FIG. 1: Paper feed cassette, 2: Copy tray, 3: Pressure plate, 4: Original table, 5, 5': Exposure lamp, 6,
6': Mirror lens, 7, 7': Charger,
8, 8': Recording drum, 9, 9': Developer tank, 1
0: Transfer power source, 11: Transfer drum, 12: Fixing device, 13, 13': Static elimination charger, 14,
14': Cleaner brush, 15: Paper feed roller, 1
6, 17: Conveyance roller, 18, 18': Transfer charger, 19: Transfer paper, 20: Transfer belt, 2
1, 21': Document feeding/discharging device, 22: Hopper, 2
3: Original tray, 24, 24': Optical lens.

Claims (1)

[Claims] 1 A plurality of document tables on which originals are placed, one automatic document feeder that feeds and ejects multiple documents to and from the document table, and a document tray provided corresponding to each document table. A plurality of copying means configured to expose to light to form an electrostatic latent image on a recording medium, develop the latent image with toner, and transfer the toner image onto transfer paper; and means for combining and copying a plurality of copy images onto the same transfer paper by passing the copying images through the copying means of Ejects the paper and the original after exposure,
After the document is ejected, the automatic document feeder and ejector itself moves to another document table, and is configured to feed another document and eject the other document after exposure. Copy machine.