JPH01172851A - Image forming device - Google Patents

Abstract

PURPOSE:To form original images on the same transfer material automatically in order without decreasing image definition nor quality by providing memory means which hold a value based upon an image area on an original and a value based upon an image formation quantity. CONSTITUTION:This device is equipped with a control means 1 which control image forming operation wherein images are formed on a transfer material plural times, a 1st memory means 7a which holds the value based upon the image area on the original, and a 2nd memory which holds the value based upon the quantity of image formation on the transfer material. Namely, the control means 1 controls the image forming operation wherein images are formed on the transfer material plural times to hold the value based upon the image area on the original in the 1st memory means 7a and the value based upon the quantity of the image information on the transfer material in the 2nd memory means 7b. Consequently, image areas are formed on the transfer material automatically in order.

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 a plurality of original images on the same transfer material, for example, the method 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.
14(a) and (b), and then paste them on paper 102-H and then copy them.
), a part of the first original 100 is first copied onto a transfer paper 103, and then a part of the second original 101 is copied onto the same transfer paper 103.

In addition, if the medium on which image information is recorded is microfilm, after enlarging and copying it onto transfer paper,
I had to cut and paste as shown in Figure 3.

(Problems to be Solved by the Invention) However, in the conventional example shown in FIG. 13, it is necessary to cut out a part of the original and then paste it, which takes a lot of work and may damage the original. There was a problem that it could not be reused. In addition, in the conventional example shown in Fig. 14, the operator must adjust the position n of the image each time it is copied, which requires one step and is not easy to operate. However, there is a problem in that the image cannot be formed on the substrate, resulting in a decrease in image quality. Furthermore, if the manuscript is on microfilm,
- Since the image is enlarged and copied onto transfer paper, there is a problem in that it is time-consuming and the image quality deteriorates.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the conventional example, and its object is to provide a method for converting images of a part of a plurality of original images without deteriorating the image quality or image quality. An object of the present invention is to provide an image forming apparatus that can automatically form images sequentially on the same transfer material.

(Means for solving the problem) In order to achieve the above object, in the present invention, at least a portion of each image on a plurality of originals is sequentially formed multiple times on the same transfer material. A forming device,
a control means for controlling a plurality of image forming operations on the transfer material; a first memory means for holding a value based on the image area on the document; and a first memory means for holding a value based on the image area on the transfer material; and second memory means for holding values.

(Function) In the present invention having the above configuration, a plurality of image forming operations on the transfer material are controlled by the control means, and a value based on the image area on the document is stored in the first memory means. By storing a value based on the amount of image formation on the transfer material in the second memory means, it is possible to automatically sequentially form images on a plurality of image areas on the 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 a first embodiment of an image forming apparatus according to the present invention, in which a microfilm 23 as a document is illuminated by an 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 where they do not block the projection optical path to the screen 26 (to the right of the second rgJ). Here, 8 is a scanner motor for moving the scan mirror 24.25, and 11 is a scanner motor for moving the scan mirror 24.2.
Mirror home sensor that detects the home position of 5.
A mirror reversal sensor 12 detects the reversal position of the scan mirrors 24 and 25.

When copying an image on the microfilm 23, scan mirrors 24 and 25 are integrally moved in synchronization with the circumferential speed of the photosensitive drum 27 as an image carrier to scan the image light on the microfilm 23, as shown in the figure. The image is projected onto the exposure position of the photosensitive drum 27 through a slit that does not cover the image.

A charging device, a developing device, a transfer device, etc. are arranged around the photosensitive drum 27, and a copy 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 device 38 or via the guide plate 35 to the lower conveyor belt 36; 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
5 is a timer that generates an interrupt signal at predetermined time intervals to the CPU; 5 is an operation key; 6 is an interface circuit that connects the operation key 5 and the CPU; 7 is an electronically configured first . A memory means having second memory means 7a, 7b, 14 is a CPU, a scanner motor 8, a paper feed roller 9, a timing roller 10, a mirror home sensor 11,
Mirror reversal sensor 12, projection lamp 21 or developing device 30
This is an interface circuit that connects the

In the above configuration, when the power switch (not shown) is turned on, the CPU turns on the lamp 21 according to the program stored in the ROM 2, and then lights up the scan mirror 24.
．． 25 is moved to the right in FIG. 2 until the mirror home sensor 11 is shielded from light 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 the required area on the image on the screen 26 using the operation key 5 (al, a2 in FIG. 8(a)), and the CPU reads the input value atta2 via the interface circuit 6. , writes al as the copy start position information and a2 as the copy end position information in the RAM which is the first memory means 7a shown in FIG. 3(a). Next, the operator presses the copy key of the operation keys 5. After clearing the accumulated amount of copying (image formation) in the second memory means 7b, the CPU controls the scanning mirrors 24 and 25 via the interface circuit 14 until the mirror reversal sensor 12 is blocked by the light shielding plate 13 as shown in FIG. The scanner motor 8 is driven to the left, and when the mirror reversal sensor 12 is blocked, the scanner motor 8 stops (indicated by ■ in Fig. 4).
Then, the transfer paper 39 is fed to the timing roller 10 by the paper feed roller 9. Thereafter, the scan mirrors 24 and 25 are moved rightward in FIG. 2 at a constant speed by the scanner motor 8 for exposure. Due to this movement, the light shielding plate 13 comes off from the mirror reversal sensor 12 (indicated by ■ in FIG. 4).
, the light shielding plate 13 is removed from the mirror reversal sensor 12 and a predetermined position (
An enlarged image of the first image frame begins to be projected onto the photosensitive drum 27 (indicated by ■ in FIG. 4).
Furthermore, point A1 of the original image is projected after T1-1=a1/v seconds, and then T2. Point A2 of the original image is projected after = a2/V seconds. At this time.

An enlarged image of the image on the microfilm 23 is formed on the photosensitive drum 27 based on a known electrophotographic process. That is, a charge is applied to the photosensitive drum 27 by the negative 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=θ
After 1/ω seconds, that is, after the light shielding of the sand diameter reversal sensor 12 is removed, a developing bias vd is applied to the sand diameter To1T + Td, and after Td=O1/ω seconds after the exposure of point A2, that is, the sand diameter After the light shielding of the reversal sensor 12 is removed, T□ + T +
Developing bias vd is cut off to T2-1 + Td sand diameter. Here, in FIG. 7, θ1 is the angle on the photosensitive drum 27 from the projection point to the developing point, θ2 is the angle on the photosensitive drum 27 from the projection to the transfer device 32, and ω is the rotational angular speed of the photosensitive drum 27. (deg/sec).

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. The developing bias Va applied to the developing device 30 is such that when the image on the microfilm 23 is negative, toner is attracted to the area of the photosensitive drum 27 that is irradiated with light, and when the image is positive, toner is attracted to the area that is not irradiated with light. It is set to absorb.

As a result of the above, on the photosensitive drum 27,! ! Image A1
An image in the range from A2 to A2 is developed. Also, after projection of point A1, T3-1;02/ω-C10 copy integration 6'')/V
After T□+T+T3-1 seconds after the second sand diameter, that is, the light shielding of the mirror reversal sensor 12 is removed, the sand diameter timing roller 10 is operated to feed the transfer paper 39 to the transfer device 32. Then, the timing roller 10 is operated accurately at a predetermined time, and the transfer paper 39 is transferred to the transfer device 21.
32, in this embodiment, as shown in the flowchart shown in FIG. 6, the number of interrupts of the timer 4 to the CPU is counted, and the time when the mirror reversal sensor 12 is no longer blocked is used as a reference point. The timing roller 10 should be operated from To1 to T1. ．． 1+r3
Number of interrupts corresponding to seconds TO+T1-1+73/τ
It is determined whether or not this has occurred. In addition, in Figure 6,
R1 and R2 are registers, and τ is the interrupt period by timer 4.

In the case of the first copying (image forming) operation, the cumulative amount of copies is 0, so T3-1 = θ/ω-Vi/V. This is the distance from the timing roller IO to the transfer device 32. The transfer device 32 transfers the visible image (toner image) on the photosensitive drum 27 onto a transfer paper 39 using a transfer function using a known alternating current.

In this case, the transferred image A1-A2 is transferred to the left end of the transfer paper 39 as shown in FIG. 8(C). After the transfer 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 transferred to the lower conveyance belt 36 by the guide plate 35.
will be guided to. Here, the transfer paper 39 is transferred to the upper conveyor belt 3
3, the toner image is preferably fixed by a separately provided fixing device. Next, the transfer paper 39 is conveyed to the guide plate 37 by the lower conveyance belt 36 and abutted against the timing roller 10. The first copying operation is completed through a series of "-1" operations. After copying, CPU
I is stored in the second memory means 7b as the number of copies A2
=A2-Memorize AI.

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 inputting from the operation key 5 as shown in B1-B2, press the copy key.Here, in the second and subsequent copy operations, the copy ia'n amount is not cleared, and
T1 and T1 of the timing chart shown in FIG. 5 for performing the second copying operation in the same manner as the first operation described above.
-2 2-2' T correspond to T , T , and T in FIG. 4, respectively. 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 10 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 operation timing of the timing roller 10 for the copying operation is determined by the mirror reversal sensor 12.
After the light shielding is removed (■ shown in Figure 5), T O+
T I-2+ T Activate after 3-2 seconds.

Here, T3-2 "θ2/ω-(also + cumulative amount of copies)/
v=θ2/ω−(cross+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 (A2 At ) + in the second memory means 7b as shown in FIG. 3(c) as the cumulative amount of copies.
(B2-Bl)=a2+b2 is stored. Thereafter, in the same way as the second copying operation, the original image is sequentially transferred to the transfer paper 39.
Copy to.

FIG. 9 shows a second embodiment of the present invention, in which the same members as in the first embodiment are given the same reference numerals.This embodiment shows a different example of the first memory means. , in FIG. 9, 51 and 52 are light shielding plates fixed to wires 53 and 54, 55 is a photointerrupter, and 58 and 59 are fixed to wires 56° and 57', and display the image forming area on the screen 26. The display plate 60 is a motor that rotates a pulley 62, which has two diameters, large and small, and drives wires 56 and 57 at a moving ratio of 1:2. 64 to 69 are pulleys that apply tension to the wire.

In the above configuration, the motors 60 and 61 are operated by an image forming area specifying switch (not shown) to move the instruction plate 58 to the left end and the instruction plate 59 to the right end of a desired image area on the screen 26, respectively. At this time, the light shielding plate 51.5
2 moves at the speed of the indicator plate 58-59 and stops at a position corresponding to the desired image area. By the way, the light shielding plate 51
, 52 and the indicator plates 58 and 59 are set to 1:2 because the scan mirror 24 scans the image projection light at the station position of the projection optical path.

During scanning, the photointerrupter 55 applies a developing bias when the light is blocked by the light shielding plate 51, and cuts off the developing bias when the light is blocked by the light shielding plate 52, thereby copying a desired image area. can do. The other configurations and functions are the same as those of the first embodiment, so their explanation will be omitted.

FIG. 10 shows a third embodiment of the present invention, in which the same members as in the first embodiment are given the same reference numerals.This embodiment shows a different example of the second memory means. In FIG. 10, 71 is a light shielding plate fixed to the wire 72, 73 is a photointerrupter, 74 is a motor that drives the wire 72 via a pulley 75, 76 is a pulley, and 77
, 78 are light shielding plates for determining the reference position of the light shielding plate 71.

It is a photo interrupter.

In the above configuration, the poem (shown in FIG. 8(a)) for which the first area-specific copying is performed is performed on the light-shielding plate 7 at the reference position.
1, the timing roller 10 is operated when the photo ink club tough 3 is shielded from light. After the first copying operation is completed, the light shielding plate 71 is moved by the motor 74 to the left in FIG. 10 by a distance of the copy area width a2. Therefore, during the next copying operation, the timing roller 1
0 operates earlier by a time equivalent to the a2 width, the next copying area will be located to the right of the previous copying area. The other configurations and functions are the same as those of the first embodiment, so their explanation will be omitted.

FIG. 11 shows a fourth embodiment of the present invention, and this embodiment shows a further different example of the second memory means, in which SWt is a switch that is turned on while the developing bias is applied; SW2 is a switch that is on while the developing bias is cut off, C1 is a capacitor that integrates charge at a predetermined rate when switch SWI is on, SW4 is a sampling switch, and C2 is a hold capacitor.
5 is a switch that is turned on when the desired image begins to be exposed; C3 is an integral capacitor that stores charge corresponding to the amount of rotation of the photosensitive drum 27 from the time when the desired image begins to be exposed; SW7 is a reset switch; Q1 to Q5 is a comparator, CL is a clutch that controls the timing roller 10, Q6 is a transistor that drives the clutch CL, R1-
R12 is a resistor, and Dl is a diode.

In the above configuration, first, SWI and SWI are turned on for the application period of the developing bias, and the transfer paper 3 is connected to the capacitor C1.
The charge corresponding to the copy amount myim to 9 is integrated. The output of the comparator Ql corresponding to the charge stored in the capacitor C1 has its sign changed by the comparator Q2,
Furthermore, an offset equivalent to θ2/ω-n/v is added (indicated by ■ in the same figure), and the potential corresponding to the cumulative amount of copying onto the transfer paper 39 is set by a sampling switch SW4, a hold capacitor C2, and a comparator Q3. Mirror reversal sensor 1 with sample-and-hold circuit
Sample-and-hold is performed when the light shielding of step 2 is removed (indicated by O in the same figure). On the other hand, switch SW5 is turned on when the desired image begins to be exposed, and resistors R11 and jiL are turned on.
Activates an integrating circuit consisting of a dividing capacitor C3 and a comparator Q4. The output of the comparator Q4 increases in accordance with the amount of rotation (process speed) of the photosensitive drum 27 from the time when the desired image begins to be exposed (indicated by O in the figure). The output of comparator Q3 <
When the output of the comparator L/Q4 is reached, the timing roller 10 is actuated via the clutch CL. Since the timing of the operation of the timing roller IO is controlled according to the cumulative amount of image formation (transfer amount) on the transfer paper 39 up to the previous time, the next copy area will be on the right side of the previous copy area. will be located. The other configurations and functions are the same as those of the first embodiment, so their explanation 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, the originals on the platen glass may be replaced manually or automatically one after another, and at least some images of these originals may be sequentially formed on the transfer material, or two different originals may be placed on the platen glass. The documents may be placed on the transfer material, and 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 sequentially form images. Image quality 9 It is possible to accurately form an image without degrading the image quality, and there is also an effect that it is possible to improve operability by eliminating the need to cut and paste 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, Fig. 3 (a), (b),
(c) is a block diagram of the memory means in the same embodiment;
5 is a timing chart showing the first copying operation in the same embodiment, FIG. 5 is a timing chart showing the second copying operation in the same embodiment, and FIGS. 6(a) and (b)
) is a flowchart 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,
Figure 8(a). (b), (c), and (d) are explanatory diagrams showing image area designation in the same embodiment, FIG. 9 is a schematic configuration diagram of the first memory means showing the second embodiment of the present invention, and FIG. The figure is a schematic configuration diagram of a second memory means showing a third embodiment of the present invention.
FIG. 12 is a circuit diagram of a second memory means showing a fourth embodiment of the present invention, FIG. 12 is an operating chart showing the operation of each part of the fourth embodiment, and FIG. 13(a). 14(b) and 14(C) are explanatory diagrams showing a conventional image processing procedure, and FIGS. 14(a) and 14(b) are 11 diagrams showing another conventional image processing procedure. Explanation of symbols l... CPU (control means) 2... ROM 3... RAM 4... timer 7... memory means 7a... first memory means 7b... second memory means 10...Timing roller 11...Mirror home sensor 12...Mirror reversal sensor 23...Micro film <g draft) 24.25...Scan mirror 27...Photosensitive drum (image carrier) 32 ...Transfer device 39...Transfer paper (transfer material) Agent Patent attorney Back 1) Rules (7□゛1 □・,. Figure 1 Figure 2 J6 Figure 3 (b) (C) Figure 4 Figure 5 Figure 7 Bottom 9 Figure 13 (a) (b) Figure 14

Claims (1)

[Claims] An image forming apparatus that sequentially forms at least a portion of each of images on a plurality of originals on the same transfer material multiple times, comprising: a control unit that controls image forming operations on the transfer material multiple times; The apparatus is characterized by comprising a first memory means for holding a value based on the image area on the document, and a second memory means for holding a value based on the amount of image formation on the transfer material. Image forming device.