JPH1165191A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent OHP sheets from being stuck to each other and stained on their surfaces and to efficiently and easily discriminate images formed on the OHP sheets by ejecting sheets of paper to the front or rear sides of the OHP sheets, at the time of forming the images on the OHP sheets and ejecting them. SOLUTION: When the fact that recording mediums to be copied are the OHP sheets is transmitted to a CPU by a signal from a fed paper kind discriminating sensor, the CPU transmits the signal to a paper feeding part, to pull out the sheets of paper 2 from a paper feeding cassette, prior to the printing of the OHP sheets 1 and supply the papers 2 into a fixed paper feeding cassette, in blank paper states. Then, bits of image information to be printed on the OHP sheets 1 are transmitted from an external device such as a computer and printed on the OHP sheets 1 by a write-in part, and the sheets 1 are put away on the papers 2 by the paper feeding part. Thus, the paper 2a is inserted between the OHP sheets 1a and 1b or the paper 2b is inserted between the OHP sheets 1c and 1d, to be housed in a stacker.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a black-and-white electrophotographic copying machine, a color electrophotographic copying machine, a laser printer, an ink jet printer and a facsimile, and more particularly, to an overhead projector (hereinafter referred to as an OHP) on which an image is formed. The present invention relates to an image forming apparatus which makes it easy to handle the processing of a sheet for ()).

[0002]

2. Description of the Related Art In an image forming apparatus having a function of forming an image on an OHP sheet, when images are continuously formed on a plurality of OHP sheets and stored in the same stacker,
OHP sheets are stuck together due to static electricity between OHP sheets, which is inconvenient to handle and adjacent OHP sheets.
There is a problem that the HP sheets are stained with each other. In addition, since the OHP sheet is generally transparent, the OHP sheet on which an image is formed has a problem that it is difficult to know what image has been formed. Conventionally, after forming an image on the OHP sheet, A person inserts a sheet between sheets to prevent the sheets from being stuck together due to static electricity and to prevent the surface from being stained by an adjacent OHP sheet, and to make it easier to grasp the image formed on the OHP sheet. Further, in consideration of the convenience in using the OHP sheet, measures have been taken such as copying the image of the OHP sheet onto a sheet so as to determine what the formed image is like.

[0003]

As described above, OHP
By inserting paper between the sheets, it is possible to prevent static electricity from sticking together and prevent the surface from being stained by the adjacent OHP sheet, and to copy the image of the OHP sheet onto the paper. Judgment as to what is done in the post-processing is all done, so the problem that each OHP sheet is stained before inserting the paper exists without being solved,
In addition, since the paper is inserted between the OHP sheets manually, the troubles remain. Accordingly, the present invention provides a method for forming an image on a plurality of continuous OHP sheets and discharging the OHP sheet.
The paper is automatically discharged between the OHP sheet and the front side or the back side of each OHP sheet.
Prevents sticking and surface contamination of P sheet, and
An object of the present invention is to provide an image forming apparatus in which the same image is simultaneously formed on a sheet when an image on an OHP sheet is formed, so that the image formed on the OHP sheet can be efficiently and easily identified.

[0004]

In order to achieve the above object,
An image forming apparatus according to a first aspect of the present invention is an image forming apparatus that can use a sheet and an OHP sheet as a recording medium. Alternatively, the image forming apparatus is configured to discharge a sheet to the back side. According to a second aspect of the present invention, in the image forming apparatus according to the first aspect, when an image is formed on an OHP sheet and discharged,
The image forming apparatus is configured to insert and discharge a sheet between a P sheet and an adjacent OHP sheet. According to a third aspect of the present invention, in the image forming apparatus according to the first or second aspect, the same image as an image formed on one of the OHP sheets adjacent to the discharged sheet is formed on the discharged sheet. An image forming apparatus is provided.
According to a fourth aspect of the present invention, in the image forming apparatus of the first, second, or third aspect, the size of the discharged sheet is equal to the larger size of the OHP sheet adjacent to the sheet. Alternatively, the image forming apparatus is configured to make the size of the OHP sheet adjacent to the sheet larger than the larger size. According to a fifth aspect of the present invention, in the image forming apparatus according to the first or second aspect, the sheet is inserted between an OHP sheet and an adjacent OHP sheet or each of the OHP sheets by specifying a sheet insertion mode. OH
The image forming apparatus discharges the sheet to the front side or the back side of the P sheet. According to a sixth aspect of the present invention, in the image forming apparatus according to the third aspect, by specifying an OHP copy mode, the same image as an image formed on one of the OHP sheets adjacent to the sheet is output to the discharged sheet. An image forming apparatus for forming an image is provided. The invention according to claim 7 is the invention according to claim 1, claim 2,
Alternatively, in the image forming apparatus according to the third aspect, the image forming apparatus is configured to form a reduced image of the OHP sheet on a sheet and discharge the sheet after forming and discharging each image on the OHP sheet. According to an eighth aspect of the present invention, in the image forming apparatus according to the seventh aspect, when a reduced image of the OHP sheet is formed on a sheet and discharged, the reduced image is formed by adding a serial number of the OHP sheet and discharged. The image forming apparatus is characterized in that: According to a ninth aspect of the present invention, in the image forming apparatus of the seventh or eighth aspect, by specifying an HP reduced copy mode, a reduced image of an OHP sheet or the OHP
The image forming apparatus is characterized in that a reduced image of a sheet is added to a serial number of an OHP sheet and formed and discharged.

[0005]

According to the first aspect of the present invention, when an image is formed on an OHP sheet and ejected, an OHP sheet is formed.
Since the paper is automatically discharged to the front side or the back side of the HP sheet, the OHP sheet does not directly touch the adjacent OHP sheet. According to the second aspect of the invention, when an image is formed on a plurality of continuous OHP sheets and discharged, a sheet is automatically inserted between the OHP sheet and an adjacent OHP sheet and discharged. Therefore, the OHP sheet does not directly touch the adjacent OHP sheet. According to a third aspect of the present invention, in addition to the image forming apparatus of the first or second aspect, the discharged paper is formed on one of the OHP sheets adjacent to the paper. Since the same image as the image is formed, it is not necessary to make a new copy for checking the image on the OHP sheet. According to a fourth aspect of the present invention, in addition to the image forming apparatus according to the first, second, or third aspect, the size of the sheet to be inserted and discharged is set adjacent to the sheet. Since the size of the OHP sheet to be used is equal to or larger than the larger size of the OHP sheet to be touched, there is no direct contact between adjacent OHP sheets. The invention according to claim 5 is
In addition to the invention of the image forming apparatus configured as in claim 1 or 2, by specifying a paper insertion mode, the paper can be moved between an OHP sheet and an adjacent OHP sheet or each of the OHP sheets. Since the sheet is discharged to the front side or the back side of the OHP sheet, whether or not to automatically discharge the sheet can be easily selected by designating the sheet insertion mode. According to a sixth aspect of the present invention, in addition to the image forming apparatus of the third aspect, by specifying an OHP copy mode, one of the OHP paper adjacent to the discharged paper is attached to the discharged paper. Since the same image as the image formed on the sheet is now formed, it is determined whether or not to automatically insert a sheet on which the same image as the image formed on the adjacent OHP sheet is formed by specifying the OHP copy mode. Can be easily selected. According to a seventh aspect of the present invention, in addition to the image forming apparatus according to the first, second, and third aspects, an OHP sheet is formed after an image is formed on an OHP sheet and discharged. Since the reduced image is formed on a sheet and discharged, it is not necessary to copy the image of the OHP sheet to another sheet for checking the formed image. According to an eighth aspect of the present invention, in addition to the image forming apparatus according to the seventh aspect, when a reduced image of an OHP sheet is formed on a sheet and discharged, the reduced image of the OHP sheet is added to the sheet. Since the sheet is formed with a serial number and discharged, a required OHP sheet can be immediately found. According to a ninth aspect of the present invention, in addition to the image forming apparatus according to the seventh or eighth aspect, by specifying an OHP reduced copy mode, a reduced image of an OHP sheet is printed on the sheet. Alternatively, since the reduced image is formed with the serial number of the OHP sheet attached and discharged, by specifying the OHP reduced copy mode, the reduced image of the OHP sheet or the serial number of the OHP sheet is added to the reduced image. The user can easily select whether to form and discharge the paper.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram of a main part of a laser printer 20 as a representative example of an image forming apparatus. The detailed configuration, operation, and the like of the laser printer 20 are publicly known, and therefore will be omitted, and the description will focus on the parts related to the present invention. In FIG. 1, a recording medium to be copied by an input signal from the operation unit 14 or a signal from a paper feed type sensor (not shown) provided in a cassette (not shown) of the paper feed unit 15 is an OHP sheet 1. The information is transmitted to the CPU 16, and image information to be printed on the OHP sheet 1 is sent from an external device 30 such as a computer. On the laser printer 20 side, image information is received from the external device 30 via the external connection unit 18 serving as an interface,
The received image information is temporarily stored in the storage unit 11, and the image information stored in the storage unit 11 is converted by the image processing unit 12 into a format to be printed.
1 is stored. On the other hand, the OHP sheet 1 is sent from a paper supply cassette or the like to a position where it can be written by the paper supply unit 15, and then, the writing unit 13 prints the image information converted into a format desired to be printed on the OHP sheet 1. The printed OHP sheet 1 is stored again in the storage stacker, which is the storage destination, by the paper supply unit 15, and then the CPU 16
The sheet 2 is pulled out from the sheet cassette by the sheet feeding unit 15 and the operation of the writing unit 13 is omitted (in the state of a blank sheet), and the sheet 2 is stacked on the OHP sheet 1. The second OHP sheet 1 is subjected to the printing process in the same manner as when printing the first OHP sheet 1 in the same manner as described above, and is stored in the same storage stacker. In this way, the OHP sheet 1 and the paper 2 are stored in the storage stacker in the combination order until the printing process on the last OHP sheet is completed. The ROM / RAM 17 is mainly a CP
It is used as a storage location of the U16 program and a storage location of the calculation result of the CPU 16.

FIG. 2 shows a state in which OHP sheets and sheets are placed in a storage stacker in this order. In the figure, they are drawn as if they are side by side, but they are actually stacked with the front facing up. In this state, the sheet 2a is placed between the OHP sheet 1a and the OHP sheet 1b,
The paper 2b is inserted and stored between the P sheet 1c and the OHP sheet 1d, and the display between the OHP sheets 1b and 1c is omitted. In addition, after the printing of the OHP sheet 1d which is finally printed and stored in the storage stacker,
The sending of the sheet 2 is omitted. Next, another embodiment of the image forming apparatus according to the present invention will be described. The CPU determines that the recording medium to be copied is an OHP sheet 1 based on an input signal from the operation unit 14 or a signal from a paper type sensor (not shown) provided on a cassette (not shown) of the paper supply unit 15.
When transmitted to the paper feeder 16, the CPU 16 sends a signal to the paper feeder 15 to draw out the paper 2 from the paper feed cassette prior to printing of the OHP sheet 1, and to deliver it to a predetermined paper feed cassette in a blank state. Next, image information to be printed on the OHP sheet 1 is sent from an external device 30 such as a computer, and then the OHP sheet 1 is transported to a writing position, and the writing unit 13 prints the image information on the OHP sheet 1. The sheet is stored on the sheet 2 previously stored by the sheet feeding unit 15.

FIG. 3 is a view showing the OHP and paper stored in the storage stacker according to the above embodiment.
The sheet is discharged to the front side or the back side of each OHP sheet. After printing the last OHP sheet 1c, the sheet 2d is sent. However, there is a sheet 2a stored first and a sheet 2d stored after printing the last OHP sheet 1c. May be omitted. That is, CP
Depending on the control method of U16, the sheet 2a stored first or the sheet 2d stored last may be omitted. In the description of FIG. 1 and FIG.
Subsequent to the printing of the sheet 1, the sheet 2 is pulled out from the sheet cassette by the sheet feeding unit 15 which has received the control signal from the CPU 16, and the operation of the writing unit 13 is omitted (in the blank state), and the OHP It was stored on sheet 1
OHP is applied to the paper 2 pulled out after the printing of the HP sheet 1.
The same image as the image formed on the sheet 1 can be printed.

FIG. 4 and FIG. 5 are views showing the state in which the OHP sheet and the paper are stored in the storage stacker when the same image as the OHP sheet 1 is printed on the paper. FIG.
OHP sheet 1 between P sheet 1 and adjacent OHP sheet 1
In this case, the sheet 3 on which the same image as the image formed on the sheet 3 is printed is inserted and discharged. What is described as the image-formed sheet 3 corresponds to the sheet 3 on which the same image as the image formed on the OHP sheet 1 is printed, and is one sheet smaller than the OHP sheet 1. That is, the same image as the image formed on the OHP sheet 1a is formed on the image-formed sheet 3a,
It is overlaid on the HP sheet 1a. OH on the front side
There is no paper on which the image of the P sheet 1d is printed. On the other hand, FIG.
Is the lowermost OH on which no image was formed in FIG.
This shows a state in which a sheet 3d on which an image of the P sheet 1d is printed is added. That is, this is a state where sheets 3a to 3d on which the same images as those formed on the OHP sheets 1a to 1d are printed are added to the back surfaces of the OHP sheets 1a to 1d. Further, it is also possible to replace the sheet 2 of FIG. 3 with a sheet 3 on which an image is printed. In this case, the first OHP sheet 1
The paper 3 on which the same image as the image formed on the first OHP sheet 1 is printed is set on both sides of the first OHP sheet 1 one by one.

FIG. 6 shows a sheet 4 on which a reduced image of an OHP sheet and a plurality of serial numbers of the OHP sheet are printed together. On the upper left of the sheet, a reduced image 5 of the OHP sheet printed first and a serial number 6 of the OHP sheet corresponding to the reduced image 5 are attached. It becomes 5. In this example, the reduced image 5 of 15 OHP sheets and the serial number 6 of the OHP sheet are printed on one sheet. The number of OHP sheet reduced images 5 that can be printed on one sheet depends on the sheet size and the size of the OHP sheet reduced image 5, but if the size cannot be accommodated by one sheet, Will increase the number. Further, as described above, the reduced image of the OHP sheet 1 and the OHP
To print the serial number of the sheet, every time the image processed by the image processing unit 12 is printed on the OHP sheet 1 by the writing unit 13, the image is reduced by the image processing unit 12, the page number is added, and the image is stored. The information is stored in the unit 11. Next, when the end of printing on all OHP sheets 1 is detected by the CPU 16, the image processing unit 12 regroups the reduced images of the OHP sheets and the serial numbers into a form that can be printed on one sheet of paper, and re-stores them in the storage unit 11. Then, the CPU 16 sends a control signal to each of the paper feeding unit 15 and the writing unit 13. The writing unit 13 stores the storage unit 1 on the sheet sent by the sheet feeding unit 15.
3, the reduced image of the OHP sheet 1 and the serial number of the OHP sheet are written.

Although not shown, in FIGS. 2 to 5, when the size of the OHP sheet 1 is different, the size of the sheet is equal to or larger than the larger size of the adjacent OHP sheet. 1 is controlled by the CPU 16 of FIG. The above-described operation selection is performed by a changeover switch (not shown) provided in the operation unit 14 in FIG. That is, as shown in FIGS. 2 and 3 above, the sheet is discharged between the OHP sheet and the adjacent OHP sheet, or to the front side or the back side of each OHP sheet. The operation is performed by selecting a switch in the insertion mode. Further, by selecting an unshown OHP copy mode switch on the operation unit 14 in FIG. 1, the same image as the image formed on one of the adjacent OHP sheets as shown in FIGS. Form. In order to form a reduced image of each OHP sheet or a serial number of the OHP sheet attached to the reduced image and to discharge the same, select a switch (not shown) of the OHP reduced copy mode of the operation unit 14 in FIG. By doing so, the operation is performed. In the description of the above-described embodiment, an example in which an image is formed on a plurality of continuous OHP sheets and the image is discharged has been described. A configuration may also be adopted in which a blank sheet or an image-formed sheet on which the same image as the image formed on the OHP sheet is formed on the front side or the back side of the sheet.

[0012]

According to the first aspect of the present invention, the OHP sheet and the adjacent OHP sheet do not directly touch each other, so that the OHP sheets are attracted to each other by static electricity and the surface is contaminated by the adjacent OHP sheet. Can be prevented. According to the invention of claim 2, O
Since the HP sheet and the adjacent OHP sheet do not directly touch each other, it is possible to prevent the OHP sheets from being stuck together due to static electricity and from being contaminated by the adjacent OHP sheet. According to a third aspect of the present invention, in addition to the image forming apparatus of the first or second aspect, the same paper as the image formed on one of the OHP sheets adjacent to the discharged paper is provided on the discharged paper. Since an image is formed, it is not necessary to take a new copy for checking the image on the OHP sheet, so that the copy time can be reduced and the efficiency is improved. According to a fourth aspect of the present invention, in addition to the image forming apparatus of the first, second, or third aspect, a sheet having a size larger than the OHP sheet is inserted between the OHP sheets, and the adjacent OHP sheets are inserted. Since direct contact between sheets is completely eliminated, OHP
Adhesion due to static electricity between sheets and OHP next to
The surface is no longer soiled by the sheet.

According to the fifth aspect of the present invention, the first aspect has
Or, in addition to the invention of the image forming apparatus according to claim 2, since it is possible to easily select whether to insert and discharge the paper by specifying the paper insertion mode, a plurality of continuous O
It has become possible to provide an image forming apparatus in which the operation of creating an HP sheet is easy. According to the invention of claim 6, in addition to the invention of the image forming apparatus of claim 3, OH
By specifying the P copy mode, it is possible to easily select whether to insert a sheet on which an image of an adjacent OHP sheet is formed, and therefore, it is possible to easily perform an operation of creating a plurality of continuous OHP sheets. It can now be provided. According to the invention of claim 7, in addition to the invention of the image forming apparatus of claim 1, 2, or 3, it is necessary to copy the image of the OHP sheet onto a sheet for confirmation of the formed image. Since it was gone, the copying time could be shortened and the efficiency improved. According to an eighth aspect of the present invention, in addition to the image forming apparatus of the seventh aspect, an OHP sheet corresponding to an image is formed by adding a serial number of an OHP sheet to the reduced image and discharging the reduced image. OHP is now available as it can be found immediately.
The sheet is not lost, and the trouble of searching for the OHP sheet can be saved. According to the ninth aspect of the present invention,
In addition to the image forming apparatus according to claim 7 or 8, the OHP reduced copy mode is designated to form a reduced image of an OHP sheet on the paper or a sheet with the serial number of the OHP sheet added to the reduced image. This makes it possible to easily select whether or not to discharge the sheet, thereby providing an image forming apparatus in which a plurality of continuous OHP sheets can be easily created.

[Brief description of the drawings]

FIG. 1 is a block diagram of a main part of an image forming apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating insertion of a sheet between an OHP sheet and an adjacent OHP sheet.

FIG. 3 is an explanatory diagram illustrating discharge of a sheet to the front side or the back side of an OHP sheet.

FIG. 4 is an explanatory diagram illustrating insertion of a sheet on which the same image as an image formed on an OHP sheet is printed between an OHP sheet and an adjacent OHP sheet;

FIG. 5 is an explanatory diagram illustrating insertion of a sheet on which the same image as the image formed on the OHP sheet is printed on the front side or the back side of the OHP sheet.

FIG. 6 is an explanatory diagram illustrating a reduced image of an OHP sheet and a sheet printed with a serial number of the OHP sheet corresponding to the reduced image.

[Explanation of symbols]

1, 1a-1d OHP sheet 2, 2a-2d paper 3, 3a-3d OHP sheet image printed paper,
Or, an image-formed sheet 4 A reduced image of an OHP sheet and a sheet on which a plurality of OHP sheet serial numbers are printed together 5 A reduced image of an OHP sheet 6 An OHP sheet serial number 11 Storage unit 12 Image processing unit 13 Writing unit 14 Operation unit 15 Paper feed unit 16 CPU 17 ROM / RAM 18 External connection unit 20 Laser printer 30 External device

──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. ⁶ Identification code FI G03G 15/36 G03G 21/00 382

Claims (9)

[Claims] In an image forming apparatus capable of using a sheet and an OHP sheet as a recording medium, when forming an image on the OHP sheet and discharging the sheet, the sheet is discharged to the front side or the back side of the OHP sheet. Image forming apparatus. 2. An image forming apparatus according to claim 1, wherein a sheet is inserted between the OHP sheet and an adjacent OHP sheet when forming and discharging an image on a plurality of continuous OHP sheets. An image forming apparatus for discharging. 3. The image forming apparatus according to claim 1, wherein the same image as an image formed on one of the OHP sheets adjacent to the discharged paper is formed on the discharged paper. Image forming apparatus. 4. The method according to claim 1, 2 or 3.
In the image forming apparatus described above, the size of the discharged sheet is equal to the larger size of the OHP sheet adjacent to the sheet or larger than the larger size of the OHP sheet adjacent to the sheet. Image forming apparatus. 5. The image forming apparatus according to claim 1, wherein the sheet is set between an OHP sheet and an adjacent OHP sheet or between each OHP sheet by designating a sheet insertion mode. An image forming apparatus for discharging paper to the front side or the back side. 6. An image forming apparatus according to claim 3, wherein the same image as an image formed on one of the OHP sheets adjacent to the sheet is formed on the discharged sheet by designating an OHP copy mode. An image forming apparatus. 7. The method according to claim 1, 2 or 3.
An image forming apparatus according to any one of claims 1 to 3, wherein a reduced image of the OHP sheet is formed on a sheet and then discharged after each image is formed on an OHP sheet and discharged. 8. The image forming apparatus according to claim 7, wherein, when a reduced image of the OHP sheet is formed on a sheet and discharged, the reduced image is formed by adding a serial number of the OHP sheet and discharged. Characteristic image forming apparatus. 9. The image forming apparatus according to claim 7, wherein by specifying an OHP reduced copy mode, a reduced image of an OHP sheet or a reduced image of the OHP sheet is designated as an OHP sheet. An image forming apparatus which forms a sheet with a serial number and discharges the sheet.