JPH01147483A - Image forming device - Google Patents

Abstract

PURPOSE:To automatically and sequentially form plural images on a transfer material by controlling the feed timing of the transfer material to a transfer means based on the cumulative amount of image formation amount to the transfer material. CONSTITUTION:The title device is provided with the transfer means 32 transferring visible images on an image carrier 27 to the transfer material 39 and a means controlling the feed timing of the transfer material 39 with respect to the transfer means 32 based on the cumulative amount of the image formation amount to the transfer material 39. Thus, images on plural originals are automatically and efficiently integrated into one sheet of transfer material so as to form images. Image formation can be correctly performed without lowering image quality and picture quality. The patching operation of the originals becomes unnecessary, thereby improving operability.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an image forming apparatus that edits an image on a document and forms an image on a transfer material in a microfilm reader printer, a copying machine, or the like.

(Prior Art) Conventionally, in order to form images of some of the images of a plurality of originals on the same transfer material, for example, as shown in FIG.
), (b), and (c), first, a part of the first original 100 is cut out, and then a part of the second original 101 is cut out.
After cutting out a part of the paper, paste them on the paper 102 and then copy them, or as shown in FIGS. 11(a) and (b)
As shown in FIG.
After copying onto the same transfer paper 10.3J1, a part of the second original 101 is copied onto the same transfer paper 10.3J1.

In addition, if the medium on which the image information is recorded is microfilm, after enlarging the image onto transfer paper,
I had to cut and paste as shown in Figure 0.

(Problems to be Solved by the Invention) However, in the conventional example shown in FIG. 10, a part of the original must be cut out and then pasted, which is time-consuming and may damage the original. There was a problem that it could not be reused. In addition, in the conventional example shown in Fig. 11, the operator must adjust the position of the image each time it is copied, which is time consuming and difficult to operate, and also requires the operator to accurately place a portion of each image on the transfer paper. There is a problem that image formation cannot be performed and the quality of one image is degraded. Furthermore, when the original is a microfilm, the image is enlarged and copied onto a transfer paper, which is time-consuming and deteriorates the image quality.

Therefore, the present invention has been made to solve the above-mentioned problems of the conventional example, and its purpose is to improve the image quality of some of a plurality of original images without degrading the image quality. An object of the present invention is to provide an image forming apparatus capable of automatically forming each image on the same transfer material.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, at least some images in a plurality of original images are sequentially transferred onto the same transfer material via an image carrier. An image forming apparatus that forms an image multiple times, the image forming apparatus including a transfer means for transferring a visible image on the image carrier to the transfer material, and a transfer means for transferring the visible image on the image carrier to the transfer material based on the cumulative amount of image formation on the transfer material. and means for controlling the feeding timing of the transfer material.

(Function) “In the present invention having the above configuration, by controlling the feeding timing of the transfer material to the transfer means based on the cumulative amount of image formation on the transfer material, multiple images are automatically It is possible to sequentially form images on a transfer material.

(Example) The present invention will be explained below based on the illustrated example. Second
The figure shows a schematic configuration of a microfilm reader printer as an embodiment of an image forming apparatus according to the present invention, in which a microfilm 23 as a document is illuminated by illumination means consisting of a projection lamp 21 and a condenser lens 22. The image is projected onto the screen 26 at a predetermined magnification by the projection lens 31 by a league optical system comprising a projection lens 31 having a zoom prism function and a mirror 20. In this case, the scan mirrors 24 and 25 for the printer are retracted to a position (toward the right in FIG. 2) where they do not block the projection optical path to the screen 26. Here, 8 is a scanner motor for moving the scan mirror 24.25, 11 is a mirror home sensor that detects the home position of the scan mirror 24.25, and 12 is a mirror reversal sensor that detects the inverted position of the scan mirror 24.25. It is a sensor.

In addition, when copying an image on the microfilm 23, the scanning mirrors 24 and 25 are integrally moved in synchronization with a local part of the photosensitive drum 27 as an image carrier to scan the image light on the microfilm 23 (not shown). The image is projected onto the exposure position of the photosensitive drum 27 through the slit.

A charging device, a developing device, a transfer device, etc. are arranged around the photosensitive drum 27, and copies can be obtained by a known process. That is, after the photosensitive drum 27 is uniformly charged by the primary charger 29, the image on the microfilm 23 is exposed to form an electrostatic latent image. This electrostatic latent image is developed into a visible image by a developing device 30, and the visible image is transferred onto a transfer paper 39 by a transfer device 32 serving as transfer means. Further, 9 is a paper feed roller that takes out the transfer paper 39 as a transfer material from the paper feed cassette 40, 10 is a timing roller that feeds the transfer paper 39 based on a timing signal, and 28 is a roller that removes unnecessary charges from the photosensitive drum 27. 33 is an upper conveyor belt that conveys the transfer paper 39 after the image has been transferred; 34 is a lamp that determines whether the transfer paper 39 is conveyed to the fixing frame 38 or sent to the lower conveyor belt 36 via the guide plate 35; A switch 37 is a guide plate for refeeding the transfer paper 39 to the timing roller 10.

FIG. 1 is a block diagram showing the control system of this embodiment, and in the same figure, 1 is a central processing unit (CPU) as a control means, 2 is a ROM that stores a CPU operating program, and 3 is a CPU RAM used during operation of 4
is a timer that generates 11 muddy signals at predetermined time intervals on the CPU, 5 is an operation key, and 6 is an operation key 5 and the CPU
An interface circuit 7 connects the first . memory means 14 having a second memory means 7a, 7b, a CPUI, a scanner motor 8, a paper feed roller 9. Timing roller 10. Mirror home sensor 1
1. This is an interface circuit that connects the mirror reversal sensor 12 to the projection lamp 21 or the developing device 30.

- In the configuration described above, when the power switch (not shown) is turned on, the CPU lights up the lamp 21 according to the program stored in the ROM 2, and then lights up the scan mirror 21.
4.25, move the mirror home sensor 11 to the right in FIG. 2 until the light is shielded by the light shielding plate 13. Thereby, the image on the microfilm 23 is projected onto the screen 26 by the projection lens 24. In this state, the operator or the automatic information retrieval device selects a desired first image frame from the microfilm 23. Here, the operator specifies and inputs a required area on the image on the screen 26 using the operation keys 5 (a+, A2 in FIG. 8(a)). The CPU reads the input value aloa2 through the interface circuit 6, and stores it in the RAM, which is the first memory means 7a shown in FIG. 3(a), as the copy start position information and A2 as the copy end position information. Insert.

Next, when the operator presses the copy key of the operation key 5, after clearing the copy (image forming) integration value 11 in the second memory means 7b, the CPU passes through the interface circuit 14 and mirror-inverts the scan mirrors 24 and 25. The scanner motor 8 is driven to the left in FIG. 2 until the sensor 12 is shielded from light by the light shielding plate 13, and when the mirror reversal sensor 12 is shielded from light, the scanner motor 8 is stopped (indicated by ■ in FIG. 4). Then, the paper feed roller 9 feeds the 2J paper 39 to the timing roller 10. Thereafter, the scan mirrors 24 and 25 are moved at a constant speed by the scanner motor 8 in the right direction in FIG. 2 for exposure. Due to this movement, the light shielding plate 13 is removed from the mirror reversal sensor 12 (indicated by ■ in FIG. 4). When the light-shielding plate 13 is removed from the mirror reversal sensor 12 and a predetermined (constant) idle distance to sand diameter is reached, an enlarged image of the first image frame begins to be projected onto the photosensitive drum 27 (indicated by ■ in FIG. 4). Furthermore, after T+-+=a+/V seconds, the original image sand diameter A1 point is projected, and T2-1=a? /V seconds later, point A2 of the sand diameter image is projected. At this time, a microfilm 2 is placed on the photosensitive drum 27 based on a known electrophotographic process.
An enlarged image of the image above is formed. Also in rirJ, a charge is applied to the photosensitive drum 27 by the charger 29, and an electrostatic latent image is formed on the photosensitive drum 27 by the image exposure.

Next, it is developed with toner in the developing device 30, but in this embodiment, after exposure at point A1, as shown in FIG. 7, Td=0.
After +/ω seconds, that is, To +Tl-1+Td seconds after the light shielding of the mirror reversal sensor 12 is removed, the sand diameter image bias Vd is applied, and after Td=0+/ω seconds after the exposure of point A2, that is, the mirror reversal sensor 12 To + T + after the light shielding of
-+ + T2-1 After +Td seconds, the sand diameter image bias Vd is cut off. Here, in FIG. 7, Ol is the angle on the photosensitive drum 27 from the projection point to the development point, 02 is the angle on the photosensitive drum 27 from the projection to the transfer device 32, and ω is the rotational angular velocity of the photosensitive tram 27 (deg /see), and the rotational angular velocity ω has a relationship of v=2πrω/360 with respect to the process speed V (equal to the transfer paper conveyance speed). r is the radius of the photosensitive drum 27. Developing device 30
The developing bias Vd applied to the microfilm 23 is set so that when the image on the microfilm 23 is negative, the toner is attracted to the area of the photosensitive drum 27 that is irradiated with light, and when it is positive, the toner is adsorbed to the area that is not irradiated with light. It is set to .

As a result, an image ranging from AI to A2 of the original image is developed on the photosensitive drum 27. Also, after projection of point A1, T3-1 ”θ2/ω-(l ten copy integration, lj, )
/ v seconds later, that is, after the light shielding of the mirror reversal sensor 12 is removed, the timing roller 10 is operated to the sand diameter of To +T1-+ +T3-1, and the transfer paper 39 is transferred to the transfer device 3.
2. In order to accurately operate the timing roller IO at a predetermined time and feed the transfer paper 39 to the transfer device 32, in this embodiment, as shown in the flowchart shown in FIG. 6, the timer 4 ! , the number of interrupts occurring is counted, and the time when the light shielding of the mirror reversal sensor 12 is removed is used as a reference point, and the number of interrupts TO+Tl-1+T3 corresponding to the time period To+T++13 seconds in which the timing roller 10 should be operated from this reference point. It is determined whether /τ has occurred. In addition, in FIG. 6, R1
, R2 are registers, and are the interrupt period by timer 4.

In the case of the first copying (image forming) operation, the cumulative amount of copies is 0, T3-1 = 0/ω-1/v. The sentence is the distance from the timing roller 10 to the transfer device 32. In the transfer device 32, a visible image (toner image) on the photosensitive drum 27 is transferred onto a transfer paper 39 using a known alternating current transfer unit.

In this case, the transferred images of Al to A2 are transferred to the left end of the transfer paper 39 as shown in FIG. 8(C). After the transcription is completed,
The transfer paper 39 is conveyed to the switching device 34 by the upper conveyance belt 33, and since this switching device 34 is set in advance to the left rotation position, the transfer paper 39 is conveyed to the lower conveyance belt 3 by the guide plate 35.
You will be guided to 6. Here, after the transfer paper 39 passes through the upper conveyance belt 33, it is preferable that the toner image is fixed by a fixing device provided separately. Next, the transfer paper 39 is conveyed to the guide plate 37 by the lower conveyance belt 36, and is abutted against the timing roller 10. A series of operations completes the first copying operation. After copying, CPU
I is stored in the second memory means 7b as the cumulative amount of copies a2 =
Store A2-Al.

Next, the operator selects the desired second film from the microfilm 23.
Select the image frame and position the required area as shown in Figure 8(b).
After manually pressing the operation key 5 as shown in B1-B2, press the copy key. In the second and subsequent copying operations, the cumulative amount of copies is not cleared, and the second copying operation is performed in the same manner as the first operation.

T12, T2- of the timing chart shown in FIG.
2.

T3-2 are T+-+, T2-1, and T2-1 in FIG. 4, respectively.
Corresponds to T3-1. The difference between the first copying operation and the second copying operation is that in the first copying, paper is fed by the paper feed roller 9, but in the second and subsequent copies, it is carried out by the lower conveyor belt 36, and the timing roller IO This means that the operation timing becomes earlier by a time corresponding to the cumulative amount of copies. That is, in the second copying operation, the actuation timing of the timing roller 10 for the copying operation is set after the light shielding of the mirror reversal sensor 12 is removed (O shown in FIG. 5).
After To+T12 +T3-2 seconds, sand diameter is increased. here,
T3-2 ”θ2/ω-(1+copy cumulative amount)/V=02
/ω-(1+a2)/v.

By the above operation, the image B1-B2 is copied to the right of the first copy image, as shown in FIG. 8(d). After copying, the CPUI stores (A7-Al) + in the second memory means 7b as shown in FIG. 3(C) as the cumulative amount of copies.
(B2-B+)=a2+b2 is stored. Thereafter, the original images are sequentially copied onto the transfer paper 39 in the same manner as in the second copying operation.

FIG. 9 shows the transfer paper 3 for the transfer device 32 in the present invention.
Another embodiment of the means for controlling the feeding timing of No. 9 will be described, with the same parts as in the previous embodiment being given the same reference numerals. In the same figure, 61 is a photointerrupter, 62 is a slit plate, and 63 is a The motor that rotates the slit plate 62 is a belt 64. In this embodiment, after the copying operation is completed,
Prior to the next copy, the transfer material 39 is passed through the timing roller 10 by the motor 63 while measuring the distance by a photo encoder composed of a photo interrupter 61 and a slit plate 62 for a distance #L that correlates to the cumulative value of the copy amount. Transfer material 39 is sent out. In this embodiment, the operating time of the timing roller IO is always set to 02/ω-fl/v from the time when exposure of the image to be transferred is started. The rest of the structure and operation are the same as those of the previous embodiment, so the explanation thereof will be omitted.

Although the above embodiment describes an example in which the present invention is applied to a microfilm reader printer, it is also applicable to an image forming apparatus such as a copying machine. In the case of a copying machine,
For example, if two different originals are placed on the original platen glass,
Images of at least some of these documents may be sequentially formed on the transfer material.

(Effects of the Invention) The image forming apparatus according to the present invention has the above-described configuration and operation, and can automatically and efficiently accumulate images on a plurality of documents onto a single sheet of transfer material to form an image. Image quality 9
It is possible to accurately form an image without deteriorating the image quality, and it is also possible to improve operability by eliminating the need for cutting and pasting documents.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a control system of an embodiment of the present invention;
Fig. 2 is a schematic configuration diagram of a microfilm reader printer to which the same embodiment is applied, and Fig. 3 (a), (b), (
c) is a configuration diagram of the memory means in the same embodiment, FIG. 4 is a timing chart showing the first copying operation in the same embodiment, and FIG. 5 is a timing chart showing the second copying operation in the same embodiment. , FIGS. 6(a) and (b) are flowcharts showing the copying operation of the same embodiment, FIG. 7 is an explanatory diagram showing the positional relationship of the copying mechanism in the same embodiment, and FIGS. 8(a) and (b). , (c), (d) are explanatory diagrams showing image area specification in the same embodiment, FIG. 9 is a main part configuration diagram showing another embodiment of the present invention, and FIG. 10 (a),
11(b) and 11(c) are explanatory diagrams showing a conventional image processing procedure, and FIGS. 11(a) and 11(b) are explanatory diagrams showing another conventional image processing procedure. Explanation of symbols 1...CPU 2...ROM3...RAM
4...Timer 7...Memory means 10...Timing roller 11...Home mirror sensor 12...Mirror reversal sensor 23...Micro film (ffX IQ) 24.
25...Scan mirror 27...Photosensitive drum (image carrier) 32...Transfer device (transfer means) 39...Transfer paper (transfer material) Patent applicant: Canon Corporation. Junior High 11 Agent Patent Attorney Yoshikazu Shinji, Agent Patent Attorney Back 1) Regulations 2 I N Figure 2 Figure 3 (b) (C) Figure 4 Figure 5 Figure 7 Figure 9 Figure 10 Figure (a) (b) Figure 11

Claims (1)

[Claims] An image forming apparatus that sequentially forms images of at least some of a plurality of original images on the same transfer material multiple times via an image carrier, the visible image on the image carrier being transferred to the transfer material. An image forming apparatus comprising: a transfer means for transferring an image onto the transfer material; and a means for controlling feeding timing of the transfer material to the transfer means based on a cumulative amount of image formation on the transfer material.