JPS6046579A - Composite overlay copying method - Google Patents

Abstract

PURPOSE:To take a composite overlay copy through simple operation in a short time by forming images of plural originals to be composed on an image carrier, and transferring and fixing them, one over another, on the same surface of a copy form successively. CONSTITUTION:A photosensitive body drum 9 in use is large enough to form images of two originals of normally A4 size, and a switching conveyance path 16 and a return guide plate 18 are provided on a form conveyance path. Latent images of originals A and B are formed on the drum 9 at the same time, and they are developed to form images to be composed. The image A' is formed on the copy form according to the timing of the original A, and the copy form is switched in the switching conveyance path 16. Then, the image B' is put on the same surface of the copy form according to the original B to transfer, obtaining a composite image. A developing device is not in operation during the 2ns turn. Thus, a composite overlay copy is taken through the simple operation.

Description

[Detailed description of the invention] TECHNICAL FIELD This invention relates to composite overlay copying methods.

Generally, a composite copy that combines original A and original B,
Or, a highly common manuscript A1 is combined with other different manuscripts B1 and B.
2. - Bn is synthesized (At + Bx 8' to AI 1 B2), ...... (AI + Bfi)
The need may arise to obtain synthetic copies of each.

Perform a composite overlay copy of original A and original B, and copy this composite original, or copy one original A and original A.
There is a method in which -H copies are made on a transparent copy paper used for an overhead projector, and this is superimposed on another document B to be copied as a document. These methods usually require extremely complicated operations such as multiple copying or cutting and cutting to create one composite copy.
It takes a lot of time.

Other composite copying methods include a method in which an overlay film is built into an image forming device such as a copying machine, and the originals to be combined are automatically fed to a predetermined position to perform composite copying (Japanese Patent Laid-Open No. 55-11112). -69178) and those that perform composite copying using a laser printer are known.
These have the disadvantage of requiring complex equipment.

The present invention has been made in order to eliminate the drawbacks of the conventional composite copying method as described in (2). Then, the images for composition obtained by developing each latent image are arranged on the same side of copy paper.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on a configuration example of a composite overlay copying apparatus used for carrying out the present invention.

FIG. 1 is a schematic diagram showing an example of the configuration of such a copying apparatus. In the figure, la and lb are originals placed on a transparent original platen 2 to be combined, and the originals 1a, ]1) are scanned by a scanning mirror 3 that moves together with an illumination lamp 4, and the original image moves. Images are formed on the surface of the photoreceptor drum 9 via the mirror 5, lens 6, and fixed mirror 7.8. In this configuration example, the photosensitive drum 9 is of a size that can form images of two A4-size originals, that is, an image of an A3-size original.

Generally, the size of company documents is mostly Ai1 version or 85
It is a version. In the present invention, the original images to be combined are formed in separate areas on the photoreceptor drum, so the photoreceptor drum 9 used has the above-mentioned size.

Specifically, as shown in FIG. 2(A), two document image forming areas a and b of an A4 size sheet and a margin are taken, and the image forming areas are taken as shown in FIG.
As shown in 13), the width is 310 mm and the diameter is 15971 mm.
A size of 1111 is used.

The photoreceptor layer used in the photoreceptor drum 9 is a single layer or a composite layer of selenium or selenium alloy, a mixture of amorphous silicon, Od8 alloy, or CdS fine powder and an organic or inorganic binder, or ZnO or Zn Cd
It is formed using a mixture of S and resin, a polymeric organic material such as polyvinylcarbazole, or a pyrarizone derivative organic material. As for the characteristics of the photosensitive drum, it is preferable to use one having a memory function in which a latent image once formed by exposure does not deteriorate easily.

] 0 is a developing device, and the developer may be either a -component type or a two-component type, and the developing method may be any method such as cascade development, magnetic brush development, Impreno/Yon development, Pow, Da Cloud development, etc. Can be used. However, it is convenient to use a developing device that can be controlled to be activated or deactivated as desired. This is, as explained later,
The two images formed on the photoreceptor drum 9 to be combined are
When transferring images onto copy paper in an overlapping manner, it is necessary to rotate the photoreceptor drum 9 twice, so it is necessary to prevent the developing device from operating during the rotation of the photoreceptor drum (2 rotations 1). It is.

11 is a corona charger for transfer, paper cassette 12.13
Alternatively, it is for transferring the developed image on the photosensitive drum 9 onto a copy paper supplied from one of the stack cassettes 14. As a transfer method, in addition to this corona transfer using a corona charger, a roller transfer method can be used, especially when the photoreceptor drum has a memory function and a large number of composite copies are made with - times of exposure. A two-stage transfer method using a roller is suitable.

15 is a fixing device, and in this configuration example, a heating roller 15'
Although a heat roller type fixing device including a pressure roller 15 and a pressure roller 15 is shown, the fixing device is not limited to this, and an oven type, flash type, microwave fixing method, etc. can also be used.

Reference numeral 16 denotes a switching conveyance path for selectively conveying the copy paper that has passed through the fixing device 15 to a paper discharge tray 17 or a return guide plate 18. The return guide plate 18 is used to return the conveyed copy paper to the stack cassette 14 via the conveyance path 29 and store it therein.

20 is an erasing lamp for erasing the latent image on the photosensitive drum 9; 21 is a corona charger for uniform charging; 22 is a trimming lamp; 23 is a cleaning device; 24.5.
26 is a copy paper conveyance guide plate.

Next, the operation when performing composite overlay copying using the apparatus having such a configuration will be described. As shown in Figure 3,
Combine the common original A with original B1, original C1, and make composite copies (A+B), (A, -1-0), (A
+D) will be explained.

1. Original A and original B to be combined at predetermined positions on the original platen 2
Place.゛By operating the copy start button (not shown), the scanning mirror 3 operates and the memory device 1
The latent images of the documents A and B are formed on the photosensitive drum 9, which has a photosensitive drum 9, as separate first and second A' and B' images, respectively. On the other hand, copy paper is conveyed from the paper cassette 12 or 13 toward the photosensitive drum 9 in synchronization with the timing of latent image formation on the original A, and is superimposed with the common image for composition @A' in the transfer section.
The image A' is fixed by the fixing device 15, and is transported toward the return guide plate 18 by the switching conveyance belt 16, which has been switched to the return position shown in dotted lines for retransfer.

The copy paper fed into the guide plate 18 changes direction, is conveyed toward the stack cassette 14 via the conveyor belt 19, and is temporarily stored and held within the cassette 14.

Next, the composite image B' of the original B formed on the second area of the photosensitive drum 9 passes through a predetermined position, and is stored and held in the stack cassette 14.
The copied copy paper of the common image for composition of manuscript A @A' is
It is re-supplied to the transfer unit, and the composite side @B' of the original B is transferred onto the copy paper surface on which the image A' has been transferred, and is fixed by the fixing device 15, resulting in a composite copy (A + B). form,
The paper is discharged onto a paper discharge tray 17 by the conveyor belt 16 which has been switched to the discharge side.

When using a photosensitive drum provided with two latent image forming areas a and b, the common image A' for composition is transferred and fixed onto the copy paper, the copy paper is returned to the stack cassette 14, and the composition is then performed. When trying to transfer the composite image B', stack cassette 1 is transferred to the composite image B' on the photoreceptor drum.
It is almost impossible to match the paper feed timing from 4 onwards. Therefore, as mentioned above, in order to superimpose and transfer the two composite images A' and B', it is usually necessary to rotate the photoreceptor drum 9 twice, and the photoreceptor drum 9 in the second rotation is It is configured to feed paper from the stack cassette 14 in synchronization with the compositing surface (IJB'). In this way, in order to perform composite overlay copying by two rotations of the photoreceptor drum, the imager is activated. If this state is left as it is, the latent image of the composite original B will be developed twice, and the image densities of the composite images A' and B' will be different.

In order to prevent this, as mentioned above, the operation of the developer is configured to be controllable, and the developer is disabled during the second rotation so that the latent image is not developed twice. It is something.

In addition, when obtaining multiple identical composite copies from the same originals A and B by composite overlay copying, the photosensitive drum in this configuration example has a memory function, so the latent image formed by one exposure can be used. The required number of composite copies can be created by repeating development and transfer multiple times. However, even when a photoreceptor drum without a memory function is used, the required number of composite copies can be obtained by repeating the composite copy several times, which requires exposure of the original image onto the photoreceptor drum.

To obtain a composite copy (A+O) of original A and original C following the composite copy (A+B), first set original C in place of original B at the setting position of original B, and then copy the previous composite copy. In the process, only the second latent image forming area where the "image B" of the original B was formed is cleaned, the a image of the original B in that area is erased, and the latent image of the original C is replaced with the latent image of the original A. To form an image in a second latent image forming area without erasing the image.

In this case, since the original A uses a photoreceptor drum with a memory function, there is no need to enter the original A again. It is also possible to configure so that the latent images of both documents B are erased and document A is re-inputted together with document C. Of course, if a photosensitive drum without a memory function is used, document A
must be re-entered.

Next, these latent images are developed to form composite images A' and C'.
The synthetic copy (A+O) can be obtained through the same steps as in the case of obtaining the synthetic copy (A+B).

A composite copy (A to D) of the original A and the original original can also be obtained in exactly the same process.

The example of composite overlay copying described in Section 2 shows the case where two originals are composited. After forming latent images of the original and developing them, they are transferred and fixed one after another onto the same copy paper using the same method.
It is also possible to obtain composite copies of more than one manuscript.

1. If the synthetic automatic ray copying apparatus having the configuration shown in FIG. 1 is used, the following synthetic automatic ray copying can also be performed. In other words, a common document A has documents B, C, and D.
When compositing the original A, first, set the original A on the original platen 2, input it to the first latent image forming area a of the photoreceptor drum 9, form a latent image, develop it, and transfer and fix it onto the copy paper. , the document A is housed and held in the stack cassette 14 via the return guide plate 18, and without erasing the latent image of the document A, the processes after the development step are repeated by utilizing the memory function of the photoreceptor to create the desired comprehensive acid copy. A stack cassette 14 stores and holds one sheet of copy paper on which an image A' of a document A is transferred and fixed.

While the copying process to the original is being performed, the original B is moved to the second original position on the original platen 2 for seven minutes, and after the predetermined number of copies of the original A are completed, Original document B is input into the latent image forming area, a latent image is formed, and it is developed to form a composite surface (IJB').In synchronization with this operation, image A of common document A is transferred from the stack cassette 14. The copy paper on which the image A' has been transferred and fixed is fed to the transfer unit again, the composite image B' is superimposed and transferred on the side of the copy paper to which the image A' has been transferred, and after fixing, the copy paper is discharged to the paper output tray I7, Obtain a composite copy (A+B).

By repeating each step after the latent image development step without erasing the latent image of the document B on the photosensitive drum 9, a predetermined number of composite copies (A and B) can be formed.

While the process of creating the composite copy (A-1-B) is being performed, document C is set in place of document B, and when the process of creating the composite copy (A-1-B) is completed, the photosensitive drum Clean the upper second latent image forming area, and
The latent image of the original C is erased, the original C is manually formed, a composite image C' is formed in the image forming area 2a, and then the common original is extracted from the stack cassette in the same way as when obtaining a composite copy (A and B). The copy paper on which the image A' of A has been transferred is supplied to the transfer unit, and the composite image C' is overlaid and transferred to obtain a composite copy (A10).This process is repeated to create the desired number of composite copies (A
After obtaining 10), a composite copy (A0D) of original A and original original can be obtained using the same method.

Since this composite overlay copying uses a photosensitive drum having a memory function, documents can be exchanged smoothly and the copying time can be shortened.

The above composite overlay copying is performed using a photoreceptor drum as the document image carrier, but the document image carrier is not limited to this. How to form latent image on holding drum, dielectric layer by multi-stylus? e
(17), a method of forming a latent image on a photoreceptor drum using a laser or the like, or a method of forming a latent image by combining these methods, etc.
In addition to the drum shape, a belt shape can also be used.

As described above based on the composite overlay copying apparatus used to carry out the present invention, the present invention enables each latent image of a plurality of originals to be combined to be formed on an image carrier having a latent image formation area of a plurality of originals. The composite images obtained by forming and developing each latent image are sequentially transferred and fixed onto the same side of copy paper to obtain a composite copy. Alternatively, it is possible to perform composite overlay copying in a short time with simple operations without the need for complicated operations such as creating a separate overlay film or incorporating it, and without requiring a complicated device.

In addition, by using an image carrier with memory function,
When combining a common original with many different originals and obtaining multiple composite copies for each combination,
Combined originals can be exchanged with plenty of time,
The operability and efficiency of the composite overlay copying device can be improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an example of the configuration of a composite overlay copying apparatus used for carrying out the present invention, and FIG.
FIG. 3 is an explanatory diagram illustrating a mode of composite overlay copying using the apparatus shown in FIG. 1. be. In the diagram, Ia and Ib are originals, 2 is a document table, -9 photoconductor drums, 10 is a developer, 11 is a transfer charger, 12 and Ia are paper cassettes, and 14 is a stack cassette. , 15 is a fixing device, 16 is a switching conveyor belt, and 18 is a return guide plate.

Claims (1)

[Claims] (11) An image carrier having latent image forming areas for a plurality of documents
A step of forming each latent image of a plurality of originals to be synthesized, a step of developing each latent image to form a plurality of images for synthesis, and a step of developing the plurality of images for synthesis on the same sheet-like image recording medium. A composite overlay copying method characterized by comprising the steps of sequentially transferring and fixing images onto a surface. (2) The composite overlay copying method according to claim 1, wherein the image carrier is constructed with a memory function.