JPS61174576A - Electronic copying machine with additional information recording device - Google Patents

Abstract

PURPOSE:To form an excellent image having no fog even in copying operation with an additional information function by erasing the charge of a photosensitive drum except at an additional information display part by an electrostatic discharging lamp. CONSTITUTION:Size data on the additional information display part 11 which displays a data, etc., is stored previously in the nonvolatile memory of a computer, the electrostatic discharging lamp 23 uses an LED array which is divided into may parts, and a lamp driving circuit 22 is connected thereto. Additional information is copied in the beginning of copying operation, but said size data is read out by a control circuit 21 to turn on all lamps 23 for Y1 and Y2-Y3 and performs electrostatic discharging, and lamps are turned on for Y1-Y2 to discharge other parts except the width W of the additional information. Consequently, an excellent picture having no fog is formed even in copying operation with additional information.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electronic copying machine with a device for recording additional information such as dates, pages, and other numbers and symbols.

(Prior Art) An electronic copying machine exposes a charged drum to light according to document information, and then forms a visible toner image on an electrostatic latent image formed on the drum surface. This is a device that transfers images onto recording paper. In recent years, this type of electronic copying machine has been widely used for copying information in all fields of industry. Recent electronic copying machines are commercially available that not only automatically copy a preset number of copies, but also have a zoom function for enlarging and reducing images.

FIG. 4 is a diagram showing an example of the configuration of a conventional electronic copying machine of this type. When the operator presses a copy start button (not shown), the illustrated device begins a copy operation. After the remaining toner on the drum 1 is scraped off by a blade in the cleaning section 2, which is rotating in the direction of the arrow, corona discharge is applied to the drum 1 by the charging electrode 3°, and the entire surface of the drum is charged with the charges shown in the middle column. I am made to do so.

The unnecessary portion of the charge charged by the charging electrode 3 is erased by the charge eraser lamp 4. Thereafter, the charged area of the drum 1 is exposed to an optical image signal, and a static image of the original image is formed on the drum surface. The electrostatic latent image formed on the drum surface is converted into a visible image by adsorption of toner in the subsequent part 5. The toner image on the drum surface is transferred onto the recording paper in the transfer section 6, and the recording paper that is in close contact with the drum 1 is separated. The separated recording paper is sent to the fixing roller 8 via the conveyance mechanism 7, and the recording paper is heated and pressurized by the fixing roller 58, so that the toner on the recording paper is fused to the recording paper, and the copying operation is completed. .

Recently, there has been a demand for an electronic copying machine with a so-called auto-date function that can record the date of copying in addition to the copied image. In this device, for example, a liquid crystal display is pasted on the back of the scale plate of the document table to display the date, and the date is imprinted in addition to the document image at the time of copying the document.

(Problems to be Solved by the Invention) In this type of electronic copying machine with an additional information recording device, the copy paper is fast-forwarded at the time of copying, and a date display area is displayed at the beginning of the copy paper as shown in Figure M. The additional information display section 11 of the document is copied, and then the normal document image section 12 is copied. In this case, the liquid crystal display section for displaying additional information is provided on the back side of the document table scale plate as described above, but since the light reflectance of the liquid crystal display section and the back surface of the scale plate are generally different, If the image is copied as is without any adjustment, fogging will occur between the additional information display section 11 and the other area 13, resulting in a reduction in copy image quality.

The present invention has been made in view of these points, and
The purpose is to realize an electronic copying machine with an additional information recording device that does not cause fogging between the additional information display section and other areas.

(Means for Solving the Problems) The present invention, which solves the above-mentioned problems, is an electronic copying machine equipped with an additional information recording device that is configured to copy additional information in addition to original images. The present invention is characterized in that the charge on the photosensitive drum area corresponding to the portion other than the additional information display section is erased by a charge erase lamp.

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

FIG. 1 is a configuration diagram showing an embodiment of the present invention. In the figure, 21 is 1ilI111 built into the main body of the electronic copying machine.
The circuit 22 is a lamp drive circuit that receives a lighting signal from the control circuit 21, and the reference numeral 23 is a charge erasing lamp driven by the lamp drive circuit 22. As the control circuit 21, for example, a microcomputer is used, and as the lamp drive circuit 22, a transistor circuit using a transistor array is used. As the charge erasing lamp 23, for example, a multi-divided LED array as shown in FIG. 2 is used. The lamp drive circuit 22 and the charge erasing lamps 23 are connected by the same number of drive lines as the lamps. 24 is a drum, which is the same as that shown at 1 in FIG. It should be noted that the components of the electronic copying machine that are not shown in this case include a mechanism section and a panel operation section shown in FIG. 4, but are omitted here. The operation of the device configured as described above will be explained as follows.

When a copy start button (not shown) is pressed, the electronic copying machine begins a copying operation. That is, the drum 1 starts rotating, and the entire surface of the drum 1 is charged by the charging electrode 3. In this state, the 1IIIJIID circuit 21 sends an exposure control signal to the lamp drive circuit 22. As a result, the lamp drive times 21!122
The charge erasing lamp 23 exposes the surface of the drum 24 as shown in FIG. 3. In FIG. 3, the shaded area of the charge erasing lamp 23 indicates an extinguished area. The width W of this unlit area corresponds to the width W of the liquid crystal additional information display section 11 (self-illustrated in FIG. 5). That is, by performing exposure control as shown in FIG. 3, it is possible to erase the charge on the drum surface in areas other than the additional information display section 11.

In the above explanation, the case of exposure control in the X direction in FIG. 5 has been explained, but the same control is also applied in the Y direction. Since the area from Yo to Yl in the figure is not an additional information display area, in order to prevent the formation of an electrostatic latent image in this area, the charge erasing lamp 23 is used for the area where Yo=Yt.
It is necessary to turn on all of the lights to erase the charge on all of them.

Next, for the areas Y1 to Y2, the exposure control described with reference to FIG. 3 is performed. Next, regarding the Wi region of Y2 to Y3, the situation is the same as in the case of Yo=Yt, so the charges in the entire region are erased.

In order to perform exposure control according to the area in this way, it is necessary to know in advance the dimensions of the copy paper (recording paper) (for example, A4.5) and the dimensions of the additional information display section 11. Therefore, these dimensions are set in the control circuit 2 at the time of factory shipment.
1, it is stored in the built-in non-volatile memory in advance. Thereafter, each time a copy operation is performed, the control circuit 21 retrieves these dimension data from the built-in non-volatile memory, calculates the position and number of charge erasing lamps 23 to be lit, and sends the data to the lamp drive circuit 22. Sends an exposure control signal.

In the above explanation, L
Although the case where an ED is used is taken as an example, the present invention is not limited to this. For example, a small incandescent electric lamp is used.

It may also be a collection of spheres.

(Effects of the Invention) As described above in detail, according to the present invention, in an electronic copying machine with an additional information recording device, by erasing the charge in the non-image area other than the additional information display section using the charge erasing lamp, You can obtain high-quality images without fogging.

[Brief explanation of drawings]

Figure 1 is a configuration diagram showing an embodiment of the present invention, and Figure 2 is a belt!
FIG. 3 is a diagram showing a specific configuration example of an M removal lamp, FIG. 3 is a diagram showing an exposure state, FIG. 4 is a diagram showing a configuration example of an electronic copying machine, and FIG. 5 is a diagram showing an example of a copied image. 1...Drum 2...Cleaning section 3.
...Charging electrode 4...Charging removal section 6...Transfer section 7...Transportation mechanism 8...Fixing row 5
11...Additional information display section 12...Document image section 1
3...Non-image area 21...Control circuit 22...
・Lamp drive circuit 23... Charge erasing lamp 24... Drum Patent applicant Roku Konishi Photo Industry Co., Ltd. Representative Patent attorney Fuji Ijima Jigai 1 person

Claims (1)

[Claims] In an electronic copying machine with an additional information recording device that is configured to copy additional information in addition to the original image, a charge erase lamp is used to remove the charge on the photosensitive drum area corresponding to the portion of the copy paper other than the additional information display area. 1. An electronic copying machine with an additional information recording device, characterized in that the electronic copying machine is configured to erase data using an additional information recording device.