JPH06253105A - Image forming system by transparent original reader - Google Patents

Abstract

(57) [Abstract] [Purpose] When the image of a transparent original such as a film is photoelectrically converted and read, and the signal is transmitted to the image forming apparatus to form an image on a transfer sheet, the operability of the apparatus can be stabilized. To [Structure] The image reading sensor 4 detects the amount of image information, the operation unit 9b detects the image forming mode, and the detection outputs of these are controlled by the CPU 21, so that the transfer material can be reused for double-sided printing or multiplex printing. At this time, if it is determined that the amount of image information is large and, for example, double-sided image formation is impossible, the order of feeding each film to the image reading position is changed by the autochanger 7, and the one having a small amount of image information is selected. After the image formation, the film is returned to the autochanger 7 in the initial order, and the transfer material on which the image is formed corrects the front and back sides in the initial order.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention photoelectrically converts an image of a transparent original such as a film transferred to an image reading position to perform image reading, and the image reading device communicates with an image forming device to form an image. It is about the system.

[0002]

2. Description of the Related Art Conventionally, in order to read a transparent original such as a film by an image forming apparatus such as an electrophotographic apparatus or an electrostatic recording apparatus, a technique of communicating an image to the image forming apparatus by an electric signal by a film scanner apparatus or the like. Has been proposed and put into practical use. An image reading apparatus of this type is configured as shown in FIG. That is, in FIG. 1, a film F as a transparent original is irradiated with light from a light source 1 through an optical system 2 including a condenser lens, and the image light is projected by a projection lens 3 as an image reading sensor such as a CCD as a reading element. The image reading sensor 4 reads the entire image while moving, and converts the image light into an electric signal.

Further, in this image reading apparatus, as shown in FIG. 10, a film F is held by a mount 5, and a large number of these mounts 5 are housed in a rotary tray 6 and mounted on an autochanger 7. The autochanger 7 automatically feeds the mount 5 to a predetermined position of the image reading apparatus main body 10 in order while rotating the rotary tray 6 to read the image on the film F as described above. A screen 9a on which the film F is projected and an operation unit 9b for inputting information necessary for the reading operation are provided on the upper surface of the apparatus main body 10, and the image of the film F is read before the image reading by the image reading sensor 4. Is optically projected on the screen 9a to confirm an image and set a reading area.

Then, the image light is converted into an electric signal and sent to an ordinary document reading device 11 as shown in FIG. 11, where it is edited by a digitizer or the like so as to be combined with another image, and the image is formed in the image forming device 12. Sent. As shown in FIG. 12, the image forming apparatus 12 continuously runs a rotating cylindrical image carrier 13 such as a photosensitive drum, and forms a color toner image with a plurality of color toners on its surface photosensitive layer through a predetermined process. These toner images are sequentially formed, and a color image is obtained by superposing and transferring these toner images onto a sheet-like transfer material such as a paper held by a transfer material carrying member 14 such as a transfer drum arranged in the vicinity of the surface of the image carrying body 13. After that, it is discharged to the sorter 16 through the reversing unit 15.

[0005]

By the way, in the above-mentioned conventional example, since the toners of different colors are used, the image information amount (toner amount) is larger than that of the monotone (black and white) image, and therefore the paper which is the transfer material. The amount of curl after passing through the fixing section becomes large. The main cause of the curl is that the toner is made of resin or the like, so that the contraction rate of the transfer material after fixing and the contraction rate of the toner are different, and the curl occurs on the toner side (front surface side) having a large contraction rate. When the curl amount c of the paper is measured as shown in FIG. 13, the relationship between the curl amount c and the toner amount a becomes as shown in FIG. 14, and the curl amount c increases as the toner amount a increases. Therefore, in the case of double-sided use or multiplex use of paper again, the paper cannot be re-fed from the intermediate tray or cannot be held by the electrostatic attraction (coulomb force) on the transfer drum. Paper jam (jam) occurs in. That is, there was a drawback that the operability was extremely poor.

The present invention eliminates the above-mentioned drawbacks of the prior art, and provides an image forming system in a transparent original reading apparatus which can surely form an image without causing a jam even in the case of double-sided or multi-use in which transfer paper is used again. The purpose is to provide.

[0007]

In order to achieve the above-mentioned object, the present invention reads an image of a transparent original such as a film through a predetermined process and changes the image from the image reading device to the image forming device by an electric signal. In an image system capable of communicating and forming an image and then forming an image again on the back side or the same side of the same transfer material, a means for detecting the amount of image information by an image reading sensor, etc. And a means for exchanging transparent originals by an autochanger or the like, and the control means such as a CPU for analyzing the detection output of these means, when the transfer material is reused, the sequence of the image forming mode is changed and controlled to form an image. After the predetermined process is finished, the transfer material is rearranged by controlling the correction to the set image forming mode. Further, in the sequence of the image forming mode, the transparent originals may be rearranged according to the amount of image information.

[0008]

The image system having the above-mentioned structure has a large amount of image information by the control means for analyzing the detection output from the means for detecting the amount of image information and the means for detecting the image forming mode.
If it is not possible to form images on both sides when the transfer material is reused, change the order of the transparent originals and select the one with a smaller amount of image information to perform double-sided image formation. The material is corrected on the front and back in the order in which it was initially set by the image forming apparatus.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
It will be described based on. For simplification of description, the same parts as those in the above-mentioned conventional example are designated by the same reference numerals and the description thereof will be omitted.
FIG. 1 is a block diagram of a main part of a control system of the present embodiment. A sensor board including an image reading sensor 4 has means for detecting the amount of image information, and an autochanger 7 has a film F.
And a reversing unit 15 and a sorter 16 are central control means (C).
PU) 21 and controls the operation described later.

The operation of this embodiment having the above configuration will be described with reference to the flowchart of FIG. First, a plurality of transparent originals, the film F, is placed in the rotary tray 6 as the mount 5 and attached to the autochanger 7. Therefore, in step 1, the image forming mode is set, and it is detected whether the setting mode is single-sided. If the set mode is only one-sided, a normal one-sided only image is formed in step 6 as it is.
When the image forming mode is set to double-sided or multiplex mode, curling becomes a problem when the transfer material is used again in step 2, and the amount of usable image information is determined in advance to determine whether a jam will occur, and each film is set. The image is sent to the image reading position, the image information is read by the image reading sensor 4, and it is determined whether the image information amount is larger or smaller than a predetermined amount.

When it is determined that the amount of image information is small, it is possible to form the images on the first and second surfaces as they are in step 3. If it is determined that the amount of image is large and it is impossible, it is determined in step 7 whether or not it is possible by changing the order of the films. When it is determined that the order of the films cannot be changed, the process returns to step 6 to form an image on only one side, and the process ends. If it is determined that the order of each film can be changed, in step 8, the order of feeding each film to the image reading position is changed by the autochanger 7, or the order is changed by using a memory or the like. For example, as shown in FIG. 3, there are six films a to f, and if they are left as they are, a jam will occur when creating the second side, but if the one with a small amount of image information is selected on the first side, the second side can be created. Next to
Returning to step 3, image formation is performed in the order of b, a, c, d, f, and e.

After the order of the films has been changed in step 4, the films are returned to their original positions on the rotary tray 6 by the autochanger 7 in step 5 to be in the initial order. Further, the transfer material on which the image is formed is as shown in FIG. 4, and the transfer material reversing unit 15 and the sorter 16 correct the front and back sides to the respective bin positions corresponding to the initial order, and discharge the sheet.

5 to 8 show a second embodiment of the present invention. The same members as those in the first embodiment are designated by the same reference numerals, and only different points will be described. In this embodiment, the automatic changer of the first embodiment described above is replaced with FIG.
A low cost and simple configuration magazine and carrier as shown in FIG. 2 are used. The carrier 17 is provided with a carrier window 17a into which the film F is inserted and a positioning hole 17b for indicating the position of the carrier window 17a. The carrier window 17a can be detected by the position detection sensors 8a and 8b. However, the film change must be done manually. Here, since the curl amount of the transfer material changes with the passage of time after fixing the toner as shown in FIG. 8, the contraction of the toner does not start in a short time after the fixing, and the curl amount c is small, but after a while, cooling is performed. Then, the toner starts to shrink, and the curl amount c becomes stable at a certain amount. That is, if it takes too much time to replace the film F when the second side is formed, the operation of the present embodiment cannot be performed, so be careful. Further, as shown in the block diagram of the control system of FIG. 5, the sensors 8a and 8b in the magazine 8 and the timer 22 are connected to the central control means (CPU) 21, respectively. The other structure is similar to that of the first embodiment.

The operation of this embodiment having the above configuration will be described with reference to the flowchart of FIG. First, the film F, which is a transparent original, is mounted and the carrier window 1 of the carrier 17 is mounted.
7a and insert into magazine 8. Therefore, in step 11, the image forming mode is set and it is detected whether or not the setting mode is single-sided. When the set mode is only one-sided, a normal one-sided only image is formed in step 18 as it is. If the image forming mode is set to the double-sided mode or the multiplex mode, as in the first embodiment, the usable image information amount is determined in advance whether or not a jam is generated in step 12, and the image is read to the image reading position. An instruction is given to the screen 9a to cause the operator to perform the feeding, the image information is read by the image reading sensor 4, and it is determined whether the amount is larger or smaller than a predetermined amount of image information.

If it is determined that the amount of image information is small, it is possible to create an image for the first surface in step 13, and then
At this time, as described above, the timer 22 starts when the image formation of the first side is completed and the fixing is completed so that the jam does not occur too much when the second side is created. Form an image. If the operation of the operator and the image formation are not performed within the predetermined time in step 15, in step 22, the transfer material is finished on only one side while the curl amount is small. If it is determined that the image amount is large and it is impossible, it is determined in step 19 whether or not the order of the films can be changed. When it is determined that the order of each film cannot be changed, the process returns to step 18, and the image of only one side is formed, and the process ends. If it is determined that the order of each film can be changed, the order is displayed on the screen 9a in step 20, and the carrier 1 is displayed in step 21.
The order of 7 is manually changed, and the process returns to step 13.

If image formation is performed within the predetermined time in step 15 described above, or if the order of the films is changed in step 16, the transfer material is transferred to the transfer material reversing unit 15 in step 17. And sorter 16 for carrier 1
The front and back are corrected to the respective bin positions corresponding to the order of the respective films on 7, and the film is discharged and the process is completed.

[0017]

As described above, according to the present invention, an image of a transparent original such as a film is read through a predetermined process, and an image is formed by communicating from an image reading device to an image forming device by an electric signal. In an image system capable of forming an image again on the back surface or the same surface of the same transfer material, a means for detecting the image information amount by an image reading sensor, a means for detecting the image forming mode by an operation section, and a transparent original are provided. A means that can be replaced by an autochanger or the like is provided, and when the transfer material is used again, the sequence of the image forming mode is changed and controlled by the control means such as a CPU that analyzes the detection output of the same, and after a predetermined image forming process is completed. The transfer material is rearranged by the correction control in the set image forming mode, or the transparent originals are rearranged according to the amount of image information. And in, even if the double-sided or multi that use paper as again transfer material, the image forming is performed reliably, paper jam in the image forming apparatus (jam) can prevent, be extremely improved operability.

[Brief description of drawings]

FIG. 1 is a block diagram of a control system in an image system including a transparent original reading apparatus according to a first embodiment of the present invention.

FIG. 2 is a flowchart explaining the operation.

FIG. 3 is an explanatory view showing the order change of the film to be read.

FIG. 4 is an explanatory view showing the reordering of transfer sheets.

FIG. 5 is a block diagram of a control system in an image system including a transparent original reading apparatus according to a second embodiment of the present invention.

FIG. 6 is a perspective view showing a configuration of the magazine and a carrier.

FIG. 7 is a flowchart illustrating the operation.

FIG. 8 is a characteristic diagram showing a relationship between a curl amount of transfer paper and time.

FIG. 9 is a configuration diagram illustrating image reading in a transparent original reading apparatus of a conventional example.

FIG. 10 is a perspective view of a transparent original reading device similarly using an automatic changer.

FIG. 11 is a perspective view showing the relationship between a transparent original reading device using a magazine and an image forming apparatus.

FIG. 12 is a cross-sectional view showing the configuration of the image forming apparatus.

FIG. 13 is a diagram illustrating a curled state of a transfer sheet.

FIG. 14 is a characteristic diagram showing a relationship between a curl amount of a transfer sheet and a toner amount.

[Explanation of symbols]

F ... Film (transparent document), 1 ... Light source, 3 ... Projection lens, 4 ... Image reading sensor (CCD), 6 ...
Rotating tray, 7 ... Auto changer, 8 ... Magazine, 9a ... Screen, 9b ... Operating part, 10 ...
Image reading device, 11 ... Original reading device, 12 ...
・ Image forming device, 15 ・ ・ Reversing unit, 16 ・ ・ Sorter,
21 ... Central control means (CPU), 22 ... Timer.

Claims (2)

[Claims] 1. An image of a transparent original such as a film is read through a predetermined process, and an image is formed by communicating from an image reading device to an image forming device by an electrical signal, and then the image is formed again on the back surface of the same transfer material. In an image system capable of forming an image on the same surface, a means for detecting the amount of image information by an image reading sensor or the like, a means for detecting the image forming mode by an operation unit or the like, and a means for exchanging a transparent original by an autochanger or the like are provided. When the transfer material is reused, the sequence of the image forming mode is changed and controlled by a control means such as a CPU that analyzes the detected outputs, and after a predetermined image forming process is finished, the set image forming mode is corrected and controlled. An image forming system using a transparent original reading device, wherein transfer materials are rearranged. 2. The image forming system according to claim 1, wherein the transparent originals are rearranged in the image forming mode sequence in accordance with the amount of image information.