JPS58216276A - Method for combining image - Google Patents

Abstract

PURPOSE:To obtain an overlapped image, by copying an original after a part of the original is erased with an erase lamp, and then, copying another original on the same transfer paper after parts other than the part erased on the 1st original are erased with the erase lamp. CONSTITUTION:An area to be deleted 18 from an original 13 is designated through desired buttons 15a-15b and 16a-16b selected from deleting position designating button rows 15 and 16 installed to the side part of an original table. The lighting area and lighting timing of an erase lamp 3 composed of an LED array 11 are controlled correspondingly to the selected area 18. Then, the transfer paper, on which the original 13 is copied with the area 18 deleted, is returned to the paper feeding cassette and the paper is again used for copying. When the transfer paper is subjected to the 2nd copying, the previously turned on part of the erase lamp 3 is turned off and the deleting part is changed, and then, another original is inserted into the previously deleted area 18 and an overlapped image is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image composition method in an electrophotographic copying machine.

Image compositing, that is, superimposing one image on top of another to form a new image, is relatively easy to perform using an electrophotographic copying machine. This is because copying can be performed by superimposing the original of the image to be combined under the original placed on the original table of the copying machine. However, the actual work is
Since this is done with the originals turned upside down, it is difficult to align the originals with each other, and experience has taught us that it is necessary to make several miscopies in order to obtain a satisfactory composite copy. In order to prevent such miscopying, the second original to be combined with the original first original is sometimes adhered or glued with transparent tape, but the marks from the tape or overlapping surfaces may remain. It remains and becomes unsightly. Further, in this cut-and-paste method, the original is damaged, so it is usually necessary to prepare a copy of the original for cutting and pasting.

In addition to such manual image composition, copying machines equipped with overlay devices and laser light writing devices can
There is a method of automatically composing images, but this method has the disadvantage that the equipment is complicated and expensive.

An object of the present invention is to provide a method that allows image composition to be performed using a copying machine that is not much different from a conventional copying machine and without cutting and pasting.

・The image synthesis method according to the present invention uses an erase lamp (usually used to erase charges on a non-image area of a photoreceptor) in which a large number of light emitting elements are arranged in a row after charging and before development. 3.) Partially on/off control of the light emission of 1.
Erase part of the image area of the city latent image and develop it
In order to copy the copy with part of the image missing with /lq L, and to combine the part of the second original with the part where the image of this copy is missing, the on/off control of the erase lamp is changed from the previous time. 71 corresponding to the second manuscript on the contrary.
One step is achieved by forming an image of r and 'lf', developing it, and then transferring this developed image to the part where the image of the previous copy was missing.

Please refer to the attached drawing 471 below.1. An embodiment of this invention will be described. FIG. 1 shows an example of an electrophotographic copying machine for carrying out the present invention. Along, a charger 2, an erase lamp;
3, an exposure optical system 4, a developing device 5, a transfer charger 6, a separation charger 7, a cleaning device 8, a static elimination charger 9, etc. are arranged. When the surface of the photoreceptor 1 is uniformly charged to a predetermined polarity by the charger 2, the erase lamp 2 charges the area corresponding to the image portion to be erased on the first document in a manner described later. will be deleted. As is well known, in electrophotography, an electrostatic latent image is formed by exposing the surface of a charged photoconductor to selectively erase the charged charges depending on the brightness of the image, and this is coated with toner. Development is carried out by electrostatically depositing colored fine particles called so-called. Therefore, before or after image exposure by the exposure optical system 4, the erase lamp 3
When part of the charge in the image area is erased by , a latent image in that part is not formed. Therefore, development by the developing device 5 is performed on the latent image in the part other than the part where the charge has been erased, and the developed image is a part of the original image. part is missing. Such a developed image is first transferred onto a transfer paper 10 by a transfer charger 6. After the transfer paper 10 is separated from the surface of the photoreceptor 1 by being neutralized by the separation charger 7, the l-ner remaining on the surface of the photoreceptor 1 is removed by the cleaning nog device 8, and the residual potential is removed by the charger 9. is attenuated by

The transferred image on the transfer paper HIJ: is fixed onto the transfer paper 101- by a fixing device (not shown).

Next, a similar copying process is performed using the second document to be combined, but in this second process, the erase lamp 30 lighting area is the same as the first lighting area. In other words, the lighting area for the first time is 1-1 for the second time.
On/off control is performed by the control circuit so that the first non-lighting area becomes the second lighting area. As a result, the electrostatic latent image for the second original -w:h will be formed only at Become.

After this latent image is similarly developed by the developing device 5, the developed image is aligned with 1- of the transfer paper 10 on which the image has been formed by the copying process 11, that is, 1
Transfer the image under the transfer charger 6 so that the image formed by the 211111+ press is inserted into the missing part of the image formed by the 1: The simplest method for positioning is to insert the transfer paper 10 on which the image was formed in the first process into the top of the copy paper cassette of the copying machine.This allows the document to be aligned in the second process. The positioning of 1
As long as the transfer is performed under the same conditions as the previous transfer, positioning during transfer will be performed reliably. After the images to be combined have been transferred in this manner, the transfer paper 10 is separated from the surface of the photoreceptor 1 by the separation charger 7, enters a fixing device, receives the images, and is discharged to a copy tray.

The erase lamp 3 used in carrying out this invention has a second
As shown in the figure, a light emitting element 11 such as a light emitting diode
are arranged in a line in the case 12 at intervals of about 1 to 5 mm, and are arranged along the axial direction of the photosensitive drum 1. On the other hand, rows of deletion position designation buttons 15 and 16 are provided on the outside of two adjacent right-angled sides of the document table glass 14 on which the document 13 is placed on the top surface of the copying machine.
Erase lamp 3 via controller 17 respectively.
electrically connected to.

The button row +51d1 specifies the position in the scanning direction, and the button row 16 specifies the position in the direction of the photoreceptor 1 column 111. Now, press buttons +5 (Z and 1) in button row 15.
Press 5h, button 1 of button row 16 [1a and 16]
When b is pressed, the document image in the area 18 specified by these coordinates is deleted. That is,
Button 15rz, 1 and 15/I, 1:su, original 13
After how many seconds have passed since the start of scanning of the reference end 13α of
, the command is sent from controllers 17 to 11. At the same time, the controller 17 similarly issues a command to the erase lamp 3 to light up only those corresponding to the range between the buttons 16α and 16h among the emitting elements 11 using the buttons 16α and 16b, and Only the corresponding charge on the photoreceptor surface is erased. Note that if the arrangement pitch of each button is made smaller, the position can be specified more precisely, but the button row 15 is not used normally. button row 16
←11, departure) It is meaningless to make the arrangement pitch finer than the arrangement pitch of Y and element r11.

In the second copying process, deletion of the remaining part of the area specified in the first time is specified, but the area 18 specified for deletion in the first time is stored in the controller 17, and in the second time If the on/off control of the erase lamp 3 is electrically reversed, that is, if the erase lamp is turned on for areas other than the area 18, a person can memorize and manually delete the area by operating a button. This is more convenient than specifying it. If such a storage device is used, more complicated and detailed deletion position specifications can be made. In addition, the transfer paper 10 on which the image was formed in the first process is not ejected to the copy tray after fixing.
If the copying machine is configured so that the timing is determined again in the second process to feed the paper toward the transfer charger 6, manual work can be similarly omitted.

As described above, according to the present invention, it is possible to combine images by simply changing the electrical system by using an erase lamp that is also used in ordinary copying machines, and without changing the drum area. Is the configuration of the copying machine you use simple? It has the advantage that it can be manufactured at low cost with 1'l.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an example of an electrophotographic copying machine for carrying out this invention, and FIG. Four times. 1. Photoreceptor Doshino 2, 2. Charger, 3.
Erase lamp, 4.Exposure optical system, 5.Developing device, 6.Transfer charger, 1o.Transfer paper, 1
5.16 - Deletion position specification button row.

Claims (1)

[Claims] After charging and before development, the image area of the electrostatic latent image on the photoreceptor corresponding to the first original is partially controlled on and off by an erase lamp having a large number of light emitting elements arranged in a row. The erase lamp is used to erase a part of the original, develop and transfer it to obtain a copy with a part of the image missing, and to combine a part of the second original with the part of the copy where the image is missing. An image including forming an electrostatic latent image corresponding to a second document by turning the on/off control in the opposite direction to the previous one, developing this, and then transferring this developed image to the image-missing portion of the copy. Synthesis method.