JPS6270870A - Copying device - Google Patents

Abstract

PURPOSE:To discriminate whether each synthesized information is obtained from different originals or not by charging conditions to form plural images different in picture quality in a copying device for synthesized copying plural image information on one copy sheet. CONSTITUTION:The 1st original is set up on a prescribed position by an original replacing device 1, the image of the 1st original is transferred to transfer paper 10 through an illuminating/exposing optical device 5, a photosensitive body 6, a developing device 8, and a transfer drum 11 and the transfer paper 10 is stored in a storing device 13. The 2nd original is set up by the original replacing device 1, and the image of the 2nd original which is formed on the photosensitive body 6 is transferred and synthesized on the same surface as the 1st original image of the transfer paper 10. The image formation of the 1st original is executed by the normal copying process, but in case of the 2nd original, a net point pattern forming screen 45 in used to form a network point copy or a charging condition, a transfer condition or a developing bias voltage is changed to discriminate respective originals.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying apparatus for copying images onto plain paper.

In order to create documents such as certificates that have fixed contents but contain data that always changes as part of the document,
A method is used in which a composite copy is made using a manuscript format with fixed contents and a manuscript containing data.

Conventional composite copying uses a first document with holes in which the part for storing format data, i.e., information that changes from time to time, is formed as a hole, and a second document having information in the hole in the first document is used. A conventional copying machine is used to overlay a first original and a second original so that a predetermined portion of the first original and the second original are aligned, and copy them as one original using a conventional copying machine.

This method requires special processing such as punching holes in the format paper, and has the drawbacks that paper preparation is complicated and positioning of the first and second documents is troublesome.

There is also a method in which one of the first and second originals is a sheet original and the other is written using a laser beam or CRT, but in this case, a laser beam generator or CR
This requires a special high-cost device such as T, and also requires a control device with a large capacity memory to control it, which has the disadvantage of making the device complicated, larger and more expensive.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a copying machine which eliminates the drawbacks of the prior art and can easily synthesize and copy necessary portions from a plurality of originals using a simple device.

To achieve this purpose, the present invention guides the copy paper copied by exposure development, transfer, etc. to a storage position using known means for the first original, and feeds the copy paper guided to the storage position again when copying the second original. This was achieved by copying the image of the second original on the same side of the copy paper as the first original copy, and then repeating the same number of copies for the required number of originals to copy the image of the original on the same side of the copy paper and then ejecting.

Copy paper is guided to a storage device separately provided in the middle of a paper guide path between a paper feeder and a paper discharge tray, and a composite paper feed path is circulated from a copying position, for example, a transfer position, via a storage device to a copying position. Alternatively, the transfer drum can also be used as a storage device, and copy sheets can be attached to the transfer drum and fed by repeated rotations of the transfer drum.

In order to make a composite copy of a plurality of originals, it is necessary to be able to easily position each original at a document placement location and to obtain a predetermined composite copy. The first method to meet this requirement is to use paper of the same size as the first manuscript and create a second manuscript with predetermined information recorded at a position corresponding to the location where the information of the first manuscript is to be combined. There is a way. When a plurality of pieces of information are to be combined, a third manuscript, a fourth manuscript, etc. are created in the same manner. According to this method, it is possible to easily position a plurality of documents simply by placing a plurality of documents at predetermined positions on the document.

As in the first method, there are few cases in which a first manuscript, for example, a manuscript in which information is recorded according to a format, can be created in advance. Rather, when you want to match a part of an already created manuscript to an arbitrary position on the first manuscript, or because you need to save paper or aggregate data, a large number of identical data may be written on a single sheet of paper. If you want to select necessary data from the original and combine it with the first manuscript, or if you want to combine and copy only the necessary data of a manuscript that also contains unnecessary data with the first manuscript, you can copy only the necessary parts of the manuscript. In many cases, it is required to take out the original document and make a composite copy with the first original document. In this case, the first alignment method described above cannot be used.

There is a need for a method that allows alignment of all types of documents, even when the first alignment method cannot be used.

In response to this request, the present invention specifies the synthesis position of the first document, specifies the information position of each of the necessary plural documents below the second document, and specifies the information position of each document below the second document (hereinafter simply referred to as the second document). ) and the composition instruction position of the first document, and then shift the relative exposure position of the second document in the direction of movement of the copy paper and in the lateral direction according to the value of the difference. did.

The document composition position and information position indicating device can be configured by writing a position signal on the document and a position signal reading device installed in the copying machine, and can also be configured by inputting a key to the control device installed in the copying machine to indicate the position. The system is constructed by incorporating a control device to perform the operation.

Writing signal positions on the original is not recommended when the original is to be reused or when data from other parts are to be copied in the next copying process because writing marks will remain on the H original. In this case, instead of writing the signal position directly, an indicating device consisting of a group of multiple pressure-sensitive elements installed on the document table or a suitable document placement place is used to place the document on the indicating device. , the position is indicated by applying pressure to a point indicating the synthesis area or information area of the document and extracting a signal.

Furthermore, a CRT display can be used as a position indicating device. A document is once displayed on a CRT display, and a position signal is extracted by specifying the position on the display screen.

An electronic control circuit device is used as an arithmetic device based on instruction signals for the combination position of the first document and the information position of the second document.

As the exposure relative position adjusting means for the deviation of the designated position in the direction of movement of the copy paper, a means for adjusting the timing at which the copy paper arrives at the copy position, for example, the transfer position, is used. For example, the rotation start point of the transfer drum that feeds the copy paper or the registration roller that feeds the temporarily stopped copy paper is adjusted by giving a deviation from the exposure scan start point of the original according to the positional deviation, As a means for giving this deviation, a switch and a timer, etc. provided in the exposure scanning path of the original are used, and the exposure scanning device operates the switch, and then the transfer drum, registration roller, etc. start rotating.

As a result, the information image is copied to the desired position of the first original image. Other known timing adjustment devices may also be used.

The means for adjusting the lateral deviation between the first original and the second original includes a laterally movable original placing glass, an axially movable photosensitive tram, or a laterally movable imaging lens. Use an exposure optical device. The simplest method is to use a large document placement glass and to shift the document itself relative to the glass by using a display device that displays the displacement of the reference position according to the amount of shift. In this case, if the deviation in the direction of movement of the copy paper is also displayed and the originals are shifted and arranged in accordance with the deviation, the above-mentioned deviation adjustment means in the direction of movement of the copy paper becomes unnecessary.

If an original containing unnecessary information is used, the desired composite copy cannot be obtained simply by aligning the first and second originals. There is a further need to resolve this problem.

This problem can be solved by using an erase means for erasing unnecessary information parts.

As the erasing means, a white masking member for masking the original itself can be used. A masking member is provided on the back side of the document placement glass, and masks the four sides outside the position given by the information position designation signal.

As another erase means, an erase light exposure means is used to expose a portion of a charged photoreceptor outside a designated information area,
Charges outside the information area are removed by exposure to erase light.

As the erase exposure means, a method using a lamp and a halftone screen and a group of minute lamps in a row are used, and the lamps are turned on and off at the timing based on the information position signal, and the required area is scanned to the front in the scanning direction, to the rear in the scanning direction, and to the rear of the scanning direction. A method of erasing the electrical charges on the outer side portions is used.

In addition, means for regulating the charging area itself and the developing area are used.

The present invention has made it possible to compositely copy the necessary parts of a plurality of originals at the necessary positions by a method consisting of a combination of the above-mentioned means.

The present invention is applicable to cases in which each part is extracted, copied and classified in aggregation of questionnaire forms other than the above-mentioned certificate documents, cases in which a list is created from postcards from members, etc., and information stratified from various information sources such as newspapers. It can be used in many cases, such as when creating a manuscript by composing images, and when creating exam question papers.

Embodiments of a copying apparatus according to the present invention will be described with reference to the drawings.

In FIG. 1, a first document set at a predetermined position by a document changing device 1 is illuminated by a well-known illumination exposure optical device 5 including a light source 2, a mirror 3, and a lens 4, and is exposed to form an image on a photoreceptor 6. Ru. The surface of the photoreceptor 6 is uniformly charged by the charger 7 and exposed by the illumination exposure optical device 5 to form an electrostatic latent image. While the photoreceptor 6, for example a photoreceptor drum, is moving, the electrostatic latent image is developed and visualized by the developing device 8.

The developed image on the photoreceptor 6 is transferred to a transfer paper 10 as a copy paper fed from a paper feed section 9 at a transfer position. Transfer paper 1
In FIG. 1, a transfer drum 11 is used as a means for conveying the 0 to the transfer position.

After the transfer, the photoreceptor 6 is neutralized, cleaned by a cleaning device 12, and the process from charging is repeated again.

The transfer paper 10 on which the image of the first original document has been transferred is sent to the storage device 13. In FIG. 1, the transfer drum 11 is also used as a storage device 13. Therefore, the transfer paper 1o fed from the paper feed section 9 is first clamped by a clamp 14 provided on the transfer drum 11. Transfer paper 10 is transfer drum 1
1 and rotates once to transfer the image of the first document from the photoreceptor 6, and then is temporarily stored in a state fixed to the transfer drum 11 at a position where it does not contact the photoreceptor 6.

There is a method of changing the distance between the transfer drum 11 and the photoreceptor 6 in order to keep it in a non-contact state with the photoreceptor 6 during storage, and a method of providing a recess in the part of the transfer drum 11 where there is no transfer paper and placing the recess on the photoreceptor 6. Various methods such as a method of facing each other can be used.

In the above process, the image of the first document is transferred to the transfer paper, and while the transfer paper is stored in the storage device 13, the first document is taken out in the document exchange device 1, and the second document is placed in a predetermined position. Set. Thereafter, the photoconductor 6 is charged, exposed and developed in the same steps as for the first document, and the image of the second document formed on the photoconductor 6 is transferred to the transfer paper fed from the storage device 13, for example, on the transfer drum 11. By rotating again,
The image is transferred to the transfer paper 1o that is sent to the transfer position on the same surface as the image of the first original. In this way, when images of a predetermined number of originals starting from the third original are transferred and combined onto the same side of one transfer paper,
The transfer paper 10 is unclamped, fixed by a fixing device 15, and discharged onto a paper discharge tray 16.

The original replacing device 1 is simply the original placing glass 17 of a copying machine.
Alternatively, it is also possible to use a semi-automatic document handling device that has a feeding belt 18 and feeds and sets manually inserted documents to a predetermined position.

When a single format is repeatedly used as the first document, as shown in FIG. Second recorded
It is convenient to configure the document exchange device 1 with means 2o for exchanging documents 23 and the like.

The illumination exposure optical device 5 may be of a fixed illumination type or of a scanning type in which a light source or the like is moved back and forth depending on the type of document exchanger 1.

In the example shown in FIG. 1, the light source 2 and a part of the mirror 3 reciprocate within a predetermined range with respect to the original on the original placing glass 17, so that when necessary, such as when changing the magnification, the lens 4 and A slit exposure illumination device is shown that scans and illuminates a document by displacing another part of the mirror 3 and reciprocating the light source and mirror.

In the example shown in FIG. 2, a slit exposure illumination device that is exactly the same as that shown in FIG. 19, a slit exposure illumination device consisting of a light source 2' whose position is fixed and a necessary mirror 3' is used, and the image of the first original 22 and the second original 23 are projected onto the photoreceptor 6 by a common lens 4. Both images are exposed at the same location. Although the light sources 2 and 2' can be different,
Light it when illuminating the first original 19! The light source 2 may be moved beyond the illumination scanning range for the second original 23 and illuminated while being fixed in position, so that the light source 2 and the light source 2' can be used together.

In FIGS. 1 and 2, the transfer drum 11 is also used as a storage device for transfer paper after the image of the first original is transferred until the image of the second original is transferred. Therefore, when transferring the image of the second original, it is necessary to adjust the deviation in the transfer paper feeding direction between the composite position of the first original and the information position of the second original by the feeding timing of the transfer paper. The photoreceptor 6 is rotated with a desired timing shift. At this time, in order to avoid slippage between the photoreceptor 6 and the transfer drum 11, the portion of the transfer drum 11 facing the photoreceptor is formed as a recess at the stop position of the transfer drum 11 to avoid direct contact, or the transfer drum 11 is stopped. At times, a structure may be adopted in which the transfer drum 11 moves away from the photoreceptor 6.

The storage device 13 can be provided separately instead of being shared by the transfer drum 11. For example, as shown in FIG. 3, the transfer paper is sent from the paper feed section 9 to the transfer position by the photoreceptor 6 by a transfer paper conveyance means 27 having a feed roller 24 and a guide 25 or a feed belt 26, and after being transferred by known means, After the transfer paper is fixed by the fixing device 15, it is sent to the storage tray 30 through a storage path 29 which is switchably provided with a first gate 28 with respect to the path to the paper discharge tray 16. When feeding the paper into the storage tray 30, it is always turned upside down so that the leading end is fed as the leading edge, and in the illustrated example, the paper is fed and stored with the copy side facing down.

After one sheet or a predetermined number of transfer sheets on which the first original is copied is stored in the storage tray 3o, a second original is copied. In the figure, a document exchange device 1, an illumination exposure device 5.
The related parts of the photoreceptor 6 are the same as those in the example shown in FIG. 1 or 2, so their explanation will be omitted.

When copying the second original, the rotation of the registration roller is stopped by the paper feeding roller in the storage tray 30 or by the registration roller sent out in advance from the storage tray 3o in accordance with the exposure timing and provided in the middle of the transfer paper conveying means 27. The driving is performed under timing adjustment according to the positional deviation calculated by the composite position signal and the information position signal, and the composite position of the transfer paper carrying the image of the first original reaches the transfer position of the photoreceptor 6. Adjustments are made so that the information image of the second document formed on the photoreceptor 6 is exactly at the transfer position. The transfer paper is stored in the storage tray 3Q in a number corresponding to the number of originals to be combined, and is sent again to the transfer position of the photoreceptor 6, so that the transfer paper is repeatedly fed in a circular manner.

When the composite copying of the final original is completed, the transfer paper is discharged to the paper discharge tray 16 by switching the first gate 28.

In the example shown in FIG. 3, another second gate 31 is provided from the fixing device 15 to the first gate 28, and the case where the transfer paper is sent to the storage tray 30 through the first gate 28 is reversed. In other words, the switching path 32 feeds the paper into the storage tray in such a state that it does not turn over after passing through the fixing device, and the front end becomes the rear end with the copied side facing up in the figure.
It is possible to set up When the transfer paper is sent to the storage tray 30 through the switching path 32 by switching the second gate, in the next copying process, the opposite side of the transfer paper contacts the photoreceptor and is transferred. In other words, double-sided copying becomes possible.

By providing two gates 28, 31 to enable switching of two ways of feeding the transfer paper to the storage tray, composite copying, double-sided copying, and even double-sided composite copying can be made possible.

That is, double-sided composite copying is possible by performing the above-mentioned composite copying operation on one side, then feeding the paper through the switching path 32 from the second gate 31 to the storage tray 30, and then performing the above-mentioned composite copying operation on the back side again.

When making a composite copy of a plurality of originals, the originals are aligned in order to align each information image with a predetermined position on the copy paper. To perform semi-automatic or fully automatic alignment in place of the primitive method of aligning by calculation in an operator's head when manually setting a document.

One method is to provide a reading device 33 in the middle of the document feed path by the feed belt 18 (FIG. 1) of the document exchange device 1;
The mark indicating the composite position written on the 1st YK draft and the mark indicating the information position written on the 2nd draft are read, stored in the control device of the copying machine, and the deviation between the composite position and the information position is calculated or as described later. Activate the position adjustment means.

Instead of writing directly on the manuscript, place a fourth
As shown in the figure, a setting table 36 having a reference position indicator 34 for setting the original and a large number of pressure-sensitive elements 35 is installed, and the original 22 or 23 is placed on the setting table 36, and the composite area or information of the original is placed on the setting table 36. A point indicating the range of area 37 is pressurized.

It is also possible to cause the control device to store a composite area or an information area based on a pressure signal from the pressurized pressure sensitive element 35.

The set table 36 can be installed, for example, on the document table 38 shown in FIG.

It is also possible to install a CRT display instead of the set table having the pressure-sensitive element 35, display the original on the CRT display, and indicate the composition position, information position, etc. using a light pen or the like.

The document exchange device 1 shown in FIG. 1 is an example in which a sheet-like document is conveyed to the exposure position with a belt. However, in the case of a thick document in the form of a book, the document exchange device 1 is flipped up around a pivot and placed on the document placement glass. It is also possible to copy a book-shaped original by exposing the portion 17 and placing the original on it. In this case, it is convenient to place the set table 36 at an appropriate position on the copying machine so that it can be used. The document conveying system of the document switching device shown in FIG.
91747) can be used.

When the deviation between the copying position specified in advance in the same way as the synthesis position or the synthesis position of the first original and the position of the specified information to be copied on the original is calculated by the control device, the deviation is calculated. Make corrections. As a positional deviation correction device, a device for adjusting the timing between the exposure of the original or the movement of the photoreceptor and the movement of the copy paper or transfer paper is provided to correct the deviation in the direction of movement of the copy paper. For example, as described above, the control device is provided with a timing device that adjusts the drive timing of the registration rollers that cause the transfer drum and the transfer paper to stop and stand by. For example, a switch and a timer for detecting the scanning movement of the illumination light source are used.

To compensate for lateral deviations in the direction of copy paper movement,
That is, in the case of slit exposure, a method is used in which the lens is moved in a direction perpendicular to the optical path in order to correct the deviation in the longitudinal direction of the slit. In FIG. 5, when exposing information in a partial area a of an original area A, an image is usually formed on a partial area B of the photoreceptor.

The photoreceptor corresponds to copy paper or transfer paper. now lens 4
When the lens 4 moves by fl/2 in the direction perpendicular to the optical axis, it moves from the partial area on the photoreceptor to a partial area b' moved by a distance Q in the direction in which the lens 4 moved.

That is, by selecting the amount of movement of the lens in the direction perpendicular to the optical path, it is possible to arbitrarily select the image forming position on the photoreceptor, particularly on the copy paper, in the direction perpendicular to the direction of movement of the copy paper.

If used in conjunction with magnification conversion by moving the lens 4 along the optical axis, variable magnification copying and composite copying can be performed at the same time. The amount of movement of the lens in the direction perpendicular to the optical axis is set by calculating the deviation between the information position and the designated copying position by the control device using the method described above, and controlling the lens moving device using the signal obtained.

As a structure for moving the lens, for example, as shown in FIGS. 6 and 7, a lens stand 39 to which the lens 4 is fixed is supported by a lens bracket 4o, and a lens bracket 40 is rotatably supported by an optical system frame 41. Threaded shaft 42
A structure can be used in which the lens 4 is moved in a direction perpendicular to the optical axis by screwing the lens 4 into the optical axis and reversibly rotating the screw shaft 42 directly by the motor 43 or by the motor 43 via a belt or the like. If the movement of the lens bracket 40 is guided by a guide bar 44 fixed to the optical system frame 41, the lens can be smoothly reciprocated without tilting. If the optical system frame 41 itself is screwed onto a screw stud or the like in the same manner as shown in FIGS. 6 and 7 and made movable in the optical axis direction, magnification can be changed.

In addition to the method of controlling the feeding timing of the copy paper and controlling the movement of the lens, the deviation of the information position can be compensated for by making the document movable together with the document placement glass in one direction or in two orthogonal directions. You can also use a method to adjust the

To adjust the deviation in the lateral direction with respect to the copy paper feeding direction, a method of moving the photoreceptor or the photoreceptor drum, instead of the lens, in the lateral direction, that is, in the direction along the rotation axis of the drum, can also be used.

As an erasing method for erasing unnecessary portions of a document, at least four white masking plates, each movable independently, are provided on the back surface of the document placement glass 17. Of the four masking plates, two can be moved vertically and the other two can be moved horizontally, and each masking plate is moved in response to a signal indicating the area of information to be copied, and the four masking plates cover the four sides outside the copying area. It is shielded from exposure with a masking plate.

As another method, an illumination light source is provided opposite to the moving path of the photoreceptor, and the portion of the photoreceptor outside the copy area that is charged by a signal for specifying the copy area of the original is neutralized.

It is convenient to subdivide the light source in order to eliminate static in the area outside the copying area in the lateral direction with respect to the moving direction of the photoreceptor, so that the illuminated area can be arbitrarily controlled by using, for example, a group of minute lamps in - rows. be. Alternatively, as shown in FIG. 3, a halftone screen 45 is disposed between the illumination lamp 46 and the photoreceptor 6, and a method is used in which static electricity is removed in advance from the area other than the area where the image will be formed by exposing the document to light. You can also do that.

When combining information from a plurality of manuscripts, there are cases where it is desired to determine that the pieces of combined information are from different manuscripts. For example, when the front and back patterns of a double-sided printed board are created as originals and the front and back patterns are combined and confirmed, it is desirable to be able to distinguish between the patterns corresponding to the front and back sides of the combined copy. In this case, the first original is imaged using the normal copying process, and the second original is imaged using the halftone dot pattern creation screen 4 as shown in FIG.
When a light image of the original is formed on the photoreceptor by irradiating it with a full-surface exposure lamp through the photoreceptor 5, a halftone copy is obtained. This makes it possible to distinguish between the two originals. Furthermore, by changing the charging conditions, transfer conditions, or @image bias voltage for each document, it is possible to change the density of the image of each document and to discriminate each document. Furthermore, if a plurality of developing sections are provided, the color of the toner in each developing section is changed, and by developing each document with a different toner, it is possible to form images of different colors and identify the documents.

According to the present invention, it has become possible to compositely copy arbitrary plural pieces of information from plural manuscripts without requiring complicated work.

[Brief explanation of drawings]

1 to 3 are explanatory diagrams of modified examples of the composite copying apparatus according to the present invention, FIG. 4 is an explanatory diagram of a set table having a large number of pressure-sensitive elements, and FIG. 5 is an illustration of lateral position shift adjustment. FIG. 6 is a plan view of a lens moving device that implements the method shown in FIG. 5, and FIG. 7 is a parent view of the device shown in FIG.

Claims (3)

[Claims] (1) In a copying device that composites and copies multiple pieces of image information onto a single sheet of copy paper, at least one of charging conditions, erase conditions, exposure conditions, developing bias voltage conditions, and transfer conditions is changed for each image to improve image quality. A copying apparatus characterized by forming a plurality of different images. (2) Copying according to claim 1, characterized in that at least one of a charging voltage, a developing bias voltage, and a transfer voltage is changed for each image to form a plurality of images with different densities. Device. (3) For one image, the photoreceptor is erased by exposing it to light through a halftone screen, and an image is formed on it by image exposure, and for other images, the image is formed without performing erase exposure using a halftone screen. 2. The copying apparatus according to claim 1, wherein the copying apparatus makes it possible to identify the image by forming the image.