JPS6287978A - Image recording body and recording device - Google Patents

Abstract

PURPOSE:To remove the unevenness of surface electric potential and density by forming a code/coloring part on the surface of a ground layer for an image recording layer. CONSTITUTION:An angular, elliptic or circular coloring part 4a1/bar code 4a2 is formed on the surface of the ground layer 2 under a photosensitive layer 3. At the start of copying in an image forming process, the drum coloring part 4a1 is detected by an image density controlling sensor 17 and information is sent to a CPU through a cable 18 by setting up the detected part as a reference position of the photosensitive drum 1. The information and paper size information sent from a cassette 9 to the CPU through a cable 19 are operated in the CPU and driving control signals for an optical system 6 and a timing control 10 are outputted from the CPU. The optical system driving and paper feed timing are controlled by the control signals so that superposition of image formation is successively shifted in each copying, so that uneven potential on the photosensitive body 1 is suppressed at its minimum. Consequently, stable copy images free from uneven density can be obtained at the time of continuous copying.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording body used in recording devices such as electrophotography and electrostatic recording, and to improvements in recording devices using the recording body.

[Conventional technology]

Generally, aging deterioration of a recording layer of a recording device, such as a photoreceptor in an electronic copying machine, is thought to include copying deterioration due to repeated copying operations, and aging deterioration due to the elapsed time after the photoreceptor was produced. Conventionally, regarding copy deterioration, the total number of copies is counted and displayed by a counter installed in the main body of the copying machine, so that the degree of fatigue deterioration can be predicted from the counted value.

[Problem that the invention seeks to solve]

However, there is no equivalent means for detecting the deterioration over time, and the current situation is that deterioration is noticed and the photoreceptor is replaced only after the image quality has deteriorated significantly and it becomes impossible to continue copying.

Incidentally, in order to make copying machines more compact and reduce costs, so-called demand-type copying machines using small-diameter photosensitive drums have recently been put into practical use. In the photoreceptor drum of such a copying machine, a part of the photoreceptor is used in duplicate depending on the copy size, so the copying deterioration of that part is doubled compared to other parts, and the surface potential of the photoreceptor becomes unstable. Uniformity and 7S discoloration, as well as image unevenness, will occur. Further, when copying is continued, overlapping of a portion of the photoreceptor is accumulated, increasing non-uniformity of the surface potential, and noticeable density unevenness occurs on the copied image.

[Means for solving problems]

(Objective of the Invention) An object of the present invention is to be able to detect deterioration over time in the copying machine, etc. in advance and take appropriate measures, and to provide a photoreceptor with reduced copying deterioration, especially in demand-type copying machines, etc. It is about providing.

(Structure of the Invention) The above object is to provide a code and/or a code on the underlayer of the image recording layer.
Alternatively, this can be achieved by a recording device that provides a code and/or a colored portion on an image recording body provided with a colored portion and a base layer of an image recording layer, and controls recording of the image using this as a signal source.

Examples of drum-shaped photoreceptors having the above-mentioned symbols and/or colored portions of the present invention are shown in FIGS. 1(A), (13), and (C). In the figure, 1 is a drum-shaped photoreceptor having a diameter of 30 to 120+o+, 2 is a conductive underlayer made of aluminum or the like, and 3 is an organic photosensitive layer or a vapor-deposited photosensitive layer made of selenium or the like. 4al of the photoconductor l in Fig. 1 (l\) is a colored part of square, elliptical, or circular shape, 4a
2 is a bar code, which is provided on the base layer 2 under the photosensitive layer 3 in each case. Photoreceptor 1-4 in FIG. 1(B)
b is a barcode without photosensitive layer 3, for example 7 lamps 20
installed on the surface.

Also, 40 of the photoreceptor 1 in FIG. 1(C) is a bar code, which is provided on the side surface of the flange 2. The colorant used for these codes (barcodes) or colored parts is preferably one that does not inhibit the performance of the photosensitive layer 3 and has a high absorption rate of infrared rays.

Next, FIG. 2 shows a demand type copying machine which is equipped with the drum-shaped photoreceptor and has an appropriate control mechanism to reduce copying deterioration of the photoreceptor 1. As shown in FIG.

In the figure, 5 is a corona charger, 6 is an optical system for image exposure, and L
7 is a magnetic brush developer having a sleeve that rotates in the direction of the arrow; 8 is a pre-transfer charger; 9 is a cassette that receives the transfer paper P; 10 is a feeding roller; 11 is a timing roller; 12 is a timing roller; A transfer pole, 13 a separation pole, 14 a hot roll fixing device, 15 a pre-cleaning static eliminator having a static eliminator lamp and an electrode, a cleaning device having a 16H blade, K a transfer paper path, and 17 a colored section 1a. Detecting sensor; 18 is a cable that sends the signal from the sensor to the CPU; 20 is the cable that sends the paper size signal from the +91d cassette 9 to the optical system 6; 21 is the CI"U represents a cable that sends a signal from the camera to the timing roller 11. In the above configuration, the photoreceptor l rotating in the direction of the arrow is uniformly charged positively or negatively by the charger 5, and the image is transferred through the optical system 6. Exposure light is irradiated to form a latent image. This latent image is developed with a magnetic brush by a developing device 7 to form a toner image. After this toner image is easily transferred by a charger 8, it is transferred to a cassette 9. The image is transferred from the paper feed roll 10 and the timing roll 11 to the recording paper P sent out in accordance with the image formation timing by the action of the transfer pole 12.After the transfer, the recording paper P is separated by the separation pole 13, and then The sheet is completely fixed by the heat roll fixing device 14 and ejected.The photoreceptor l after transfer
After the static electricity is removed by the pre-cleaning static eliminator, it is cleaned by the cleaning device 16 and prepared for the next image formation. At the start of copying in the image forming process, the image density control sensor 17 causes the drum coloring section 4al to be activated.
is detected, and the information is sent to the CPU via the cable 18 using that portion as the reference position of the photosensitive drum 10. This information and paper size information sent from the cassette 9 to the CPU via the cable 19 are processed in the CPU to generate drive control signals for the optical system 6 and the timing roll IO.
Output from PU. In this way, the optical system drive and paper feeding timing are controlled by the control signal so as to sequentially shift the overlap of image formation for each valley copy, minimizing the potential unevenness on the photoreceptor 1, and repeating stable copy images. be made available.

Next, FIG. 3 shows a copying machine having a mechanism for detecting and controlling the aging deterioration of the photoreceptor 1, and the same reference numerals are given to the same contents as in FIG. 2. In the figure, 22 is a clock built into the main body of the copying machine, 2 is a mechanism that controls and adjusts the copying machine by receiving signals from the CPU, 24 is a cable that sends signals from the sensor 17 to the CPU, and 5 is a clock from the clock 22. Represents a cable that sends signals to the CPU.

A barcode 4a2 is used on the photoconductor l mounted in the copying machine shown in FIG. 3 in place of the colored part 4a in the case of the copying machine shown in FIG. The year, month, date, and time are included if necessary.

In the configuration described above, the image forming process is the same as that shown in FIG. 2 except for the control mechanism by the CPU. At the start of copying, the barcode 4a2 is detected by the image density control sensor F, and information on the manufacturing date of the photoreceptor 1 is sent to the CPU via the cable 24.

Separately, information on the date (time) of copying is transmitted from a clock 22 built into the copying machine body to the CPU via a cable 5.
send to. In this way, the number of days (or time) that has passed is calculated in the CI'U and compared with the number of days that the photoreceptor l has a lifespan that is stored in advance. When the number of elapsed days reaches the end of life, a warning is automatically given to the user via the control section %, and if necessary, the photoreceptor 1 is updated, image forming conditions are changed, etc. Further, service copying may be continued depending on the case.

Note that the colored portion or barcode provided on the photoreceptor
is selected as appropriate depending on the purpose, but it is also possible to install both a colored part and a bar code to detect copy deterioration and aging deterioration at the same time. Also, the installation positions of these are shown in Figure 1 (Δ),
(B) and (C) or other suitable locations may be selected.

〔Example〕

Hereinafter, the present invention will be specifically explained with reference to examples, but the embodiments of the present invention are not limited thereto.

A black electrically conductive paint was applied in the form of a bar code on a base tube of 100 mm diameter, and a selenium-based photosensitive layer was laminated thereon to obtain a drum-shaped photoreceptor. Further, as a sensor for detecting the bar code on the photoreceptor, a sensor composed of a light emitting diode that emits infrared rays and a photoreceptor was used. Since the infrared rays emitted from the light emitting diode sufficiently pass through the selenium photosensitive layer, this sensor can properly detect the barcode on the underlayer. The drum-shaped photoreceptor and sensor are U.Bix-.+000 (manufactured by Konishiroku Photo Industry).
Based on the motor M that is attached to the photoconductor and passes recording paper such as A3 size that is longer than the outer circumference of the photoreceptor, and is controlled by the solid copy deterioration control mechanism shown in FIG.
As a result of controlling the overlapping of image forming areas on the photoreceptor to form a thick film, almost no density unevenness appeared even after 100 or more copies were made continuously.

This can be said to be a significant improvement over conventional copying in which noticeable density unevenness occurs when several tens of sheets are continuously copied without the above-mentioned control.

In the present invention, information is input by providing the conductive colored portion 4a or the barcode 4a2 on the base layer 2 of the drum-shaped photoreceptor l as in the above embodiments, but as described above, other methods are also possible. For example, rather than the base of the photosensitive layer, as shown in Figure 1 (
E3) or as shown in FIG. 1 (Q), the barcode 1b or 4C may be installed on the outside of the flange of the drum-shaped photoreceptor 1. In this case, it is impossible to detect the overlapping part, but the barcode It is also possible to detect fatigue deterioration of the drum by comprehensively calculating the amount of recording paper size used and the number of copies made with respect to the diameter using the CPU.
When the detection section is provided on the drum photosensitive layer as in the case of a1 and barcode 4a2, a commonly used toner concentration detection sensor may be used as the detection means, and the CPU is capable of detecting toner concentration and fatigue. It can be fully used by programming to enable detection of the amount of deterioration. In addition to the information on the colored portion 4a or the barcode 4a2, special information possessed by the photoreceptor can be entered as necessary and input into the CPU, and there are many ways to use this information.

〔Effect of the invention〕

As explained above, according to the photoreceptor of the present invention, its deterioration over time is automatically detected, so appropriate measures can be taken at any time.Furthermore, deterioration of the photoreceptor in demand-type copying machines, etc. Since the control is reduced, it is possible to provide stable copy images without temporary density unevenness during continuous copying.

[Brief explanation of drawings]

FIG. 1(c)) is a perspective view of a drum-shaped photoreceptor having a colored portion 4a or a barcode 4a2 on the underlayer; FIG.
) is a perspective view of a drum-shaped photoreceptor with a barcode 4b on the flange surface, FIG. 1 is a perspective view of a drum-shaped photoreceptor with a barcode 4C on the outer surface of the flange, and FIG. Fig. 3 is a cross-sectional view of the main parts of the copying machine to explain the mechanism for controlling deterioration over time. ■... Photoreceptor, 2... ...Flange, 3.
...Photosensitive layer, 4a1゜4a, , , 4b, 4
c... Colored part or barcode, 5...
・Charger, 6...Optical system, 7...Developer, 8...Pre-transfer charger, 9...Cassette, 10...・・・Paper feed o-ru, 11...
...Timing roll, 12...Transfer pole, 1
3... Separation electrode, 14... Fixing device, 15
... Static eliminator, 16 ... Cleaning device, I7 ... Sensor, 18.19.20.2
1.24.25.26... Cable, 2
2...clock, L...image exposure light,
K...Transfer paper path, P...Transfer paper. Applicant Konishiroku Photo Industry Co., Ltd. Figure 1

Claims (4)

[Claims] (1) An image recording body characterized in that a code and/or a colored portion is provided on the underlayer of the layer for recording an image. (2) The image recording material according to claim 1, wherein the code and/or the colored portion is electrically conductive. (3) The image recording body according to claim 1, wherein the image recording layer has photoconductivity. (4) A recording apparatus characterized in that a code and/or a colored part is provided on the underlayer of the layer for recording an image, and the recording of the image is controlled using this as a signal source.