JPH0662201A - Image forming device - Google Patents

Abstract

PURPOSE:To provide an image forming device which improves operability such as workability for filing paper sheets printed original images. CONSTITUTION:Paper sheet cassettes constitute plural groups with plural paper sheets in different sizes as one group. The group is set by operating an automatic paper sheet selection key 22 and a paper sheet selection key 23. The original image projected on a screen 11 is read by a line sensor S, the size is discriminated, and the original image is reproduced on the paper sheet in the optimum size among the paper sheets in the plural sizes in the selected group.

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 for printing an original such as an image frame imaged on a microfilm on a recording paper.

[0002]

2. Description of the Related Art In many cases, images of originals of the same size are imprinted on a roll-shaped microfilm, even if images of originals of different sizes are imprinted. The images are usually images within a series of the same paper size. That is, for example, in a roll film on which an A-series document is imprinted, it is common that an image of an A3 size document and an image of an A4 size document are imprinted together at the same reduction ratio. Is. In addition, images of originals whose sizes are different from each other may be imprinted on the same roll film, although they are rare. That is, an A4 size document and a B5 size document may be imprinted on the same roll film at the same reduction ratio.

When the roll film on which the images of different sizes are imprinted as described above is loaded into a reader printer or a microfilm reader scanner, the image is projected on the screen, and a predetermined image is printed on a sheet. Prior to commanding a printout, the operator must select a paper size that corresponds to the size of the image projected on the screen. Therefore, conventionally, an operator searches for an arbitrary image among a large number of images projected on a roll film and projects it on the screen, then confirms the size of the image on the screen, selects the paper size, and issues a print command. However, there is a problem that the work efficiency is not good.

[0004]

Therefore, the size of the original image projected on the roll film is automatically determined,
It is desired to develop an apparatus that reproduces an image of an original on a sheet having a size corresponding to the size of the original image. However, when the size of the original image is automatically determined, if the original images of different series are imprinted on the same roll film, it will be printed on the printed paper. Will be mixed with different paper series. For example, as described above, in addition to the A series, that is, A4 size and A3 size document images, B4 or B5 document images are mixedly printed on one roll film, and are printed out. A paper
Not only 3 and A4 size papers but also B4 and B5 size papers are included, which makes it difficult to file the printed papers.

Further, even when a roll film on which original images of only the same series are printed is used,
Depending on the size and density of the area of the image in which the image is actually printed, for example, the image actually corresponds to an A4 size document, but it is mistaken for a B5 size document image. Judgment is made, and the image may be printed on B5 size paper. When such an erroneous determination occurs, sheets of different sizes are mixed, and it is difficult to perform filing of the printed sheets.

The present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to print an image of an original document on a specific sheet in a designated sheet group, and then to print the sheet. It is intended to improve the operability of the apparatus including the workability of filing.

[0007]

SUMMARY OF THE INVENTION The present invention for achieving the above-mentioned object is one of a plurality of paper groups each of which is composed of a plurality of papers of mutually different sizes.
Group selection means for selecting one paper group, discrimination means for discriminating the size of the image of the original, and a plurality of sizes belonging to the paper group selected by the group selection means according to the discrimination result of the discrimination means. An image forming apparatus comprising: a sheet selecting unit that selects a specific sheet from among the sheets. Further, according to the present invention, a group selecting means for selecting one paper group out of a plurality of paper groups each composed of a plurality of papers of different sizes, and an image of an original image printed on a microfilm are enlarged. The size of the image projected on the screen by changing the size of the image based on the screen projected by the group and the paper group selected by the group selection unit, and the size of the image projected on the screen. Discriminating means for discriminating on the screen, and paper selecting means for selecting a specific paper from among plural sizes of papers belonging to the paper group selected by the group selecting means according to the discrimination result of the discriminating means. An image forming apparatus comprising:

[0008]

In the present invention having the above-described structure, a plurality of types of paper on which the original is reproduced are prepared, and these are divided into a plurality of paper groups. Each paper group has a plurality of paper sizes. Any of the plurality of paper groups is selected by the group selection means. Further, the size of the image of the original is determined by the determination means,
Based on the determination result, the image of the original is formed on a sheet of a specific size among the plurality of sheets selected by the group selection unit. Therefore, the image to be reproduced is a sheet of any size within the selected group.
When the image projected on the microfilm is projected on the screen to search for the image and the searched image is printed on the paper, the image projected on the screen based on the selection of the paper group to be printed. Changes in size. Therefore, for example, a B5 size document and A
Even if the four size originals are printed on the film at the same reduction ratio, they can be projected on the screen in substantially the same size. That is, it is possible to project the image of the document of B5 size projected on the film in the size of A4 on the screen. The size of the projected image is discriminated by the discriminating means on the screen, and printing is performed on a sheet of any size in the selected sheet group corresponding to the discriminated size of the projected image. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings showing the case where the image forming apparatus of the present invention is applied to a microfilm scanner. FIG. 1 shows the external appearance of a system of a digital micro reader printer (DMP) 3 which is configured by combining a micro film scanner 1 and a laser beam printer (LBP) 2. The scanner 1 is a device that reads an image of a document imaged on a microfilm. The LBP 2 is a device that prints the read image data on recording paper, and four paper feed cassettes 4 to 7 are detachably attached to the LBP 2. Of these paper feed cassettes, for example, the paper feed cassette 4 accommodates A3 size paper, the paper feed cassette 5 accommodates A4 size paper, and the paper feed cassette 6 accommodates B4 size paper. The paper cassette 7 is adapted to accommodate B5 size paper. Therefore, in the illustrated case, the sheet feeding cassettes 4 and 5 for storing A series sheets constitute one sheet group, and the sheet feeding cassette 6 for storing B series sheets,
7 constitutes another sheet group.

As shown in FIGS. 2 and 3, the housing 10 of the scanner 1 is provided with a screen 11 on the front surface thereof, and below the screen 11 is supported by a film carrier (not shown). Micro film F
Is to be loaded. A light source lamp 13 is incorporated in the lower part of the housing 10, and the lamp 13
The light generated by is collected by the condenser lens 14 and applied to the film F. Above the film F,
A projection lens 15 and an image rotating prism 16 are arranged, and the light transmitted through the prism 16 is transmitted to the first mirror 17 and the second mirror 17.
The image reflected on the mirror 18 and projected on the film F is projected on the screen 11.

In order to read the image information projected on the screen 11, an image sensor in which CCD elements are linearly arranged, that is, a line sensor S is provided on the inner surface of the screen 11 in the vertical direction as shown in FIG. The line sensor S is movable in the left-right direction along the screen 11 as shown by the arrow in FIG. The line sensor S is moved from the right side to the left side in FIG. 3 to perform a preliminary scan to determine the position and size of the image and the exposure amount during the main scan, that is, the optimum density. During the main scan, the line sensor S moves from the left side to the right side in FIG. 3 to read the image data, and after the image processing, the image data is output to the printer 2. At the time of a reader, that is, when the image projected on the film is projected on the screen 11 and the operator browses it, the line sensor S stands by at a position invisible on the screen 11.

In the illustrated case, the line sensor S is moved in the horizontal direction in FIG. 3 to perform the scanning movement. However, the scanning method for reading an image is not limited to this. Various methods such as a film scanning method of moving a film and a mirror scanning method of moving a mirror can be adopted.

The housing 10 is provided with an operation panel 20 located below the screen 11. The operation panel 20 includes a print key 21 for instructing a print operation and an automatic paper selection key 2 for switching between manual and automatic selection of the size of the output paper.
2 and a paper selection key 23 that selects the output paper size when manually selecting the paper size, and sets the paper series to the A series or B series when automatically setting the paper size. And are provided. When the paper size is set to be automatically selected by the operation of the automatic paper selection key 22, the LED 24 for displaying the automatic paper selection mode for notifying the operator is turned on.
In addition, five paper size LEDs 25a to 25e are provided to display the size of the paper selected manually or automatically.
Is provided on the operation panel 20, and a paper empty display LED 26 that lights up when a paper shortage occurs is provided. Note that the selected paper is A for the LED 25a.
3, LED25b is A4, LED25c is A5, LED
25d indicates that the size is B4, and the LED 25e indicates that the size is B5. The operation panel 20 is provided with characters (not shown) indicating the paper size corresponding to each LED.

FIG. 4 is a block diagram showing a control circuit of the image forming apparatus of the present invention. A key input signal provided on the operation panel 20 is sent to the illustrated CPU 30, and a cassette relating to the size of the sheets stored in the four sheet feeding cassettes 4 to 7 shown in FIG. An information signal is sent. Based on this cassette information signal, the RAM 40 stores the size of the paper stored in each cassette in advance. The CPU 30 sends a cassette selection signal to the printer 2 based on the stored size information. A clock signal of a predetermined frequency is output from the clock generation circuit 31, and this clock signal is sent to the CPU 3
0 and the line sensor S. A / D converter 32
Is an analog signal of the image information from the line sensor S, C
It is converted into a digital image signal based on the conversion signal from the PU 30. The converted digital signal is input to the shading circuit 33, and is converted to a grayscale image signal for forming a grayscale image based on the shading signal output from the CPU 30. This grayscale image signal is input to the comparison circuit 34. The threshold value matrix storage unit 35 stores a plurality of reference densities for the density comparison in the comparison circuit 34. The reference density used in the comparison circuit 34 will be selected based on the threshold matrix selection signal output from the CPU 30, and the selected threshold matrix will be given to the comparison circuit 34 as a threshold signal. . The selection output circuit 36 is the CPU 3
An image signal binarized based on the effective image signal output from 0 is selectively output. The image memory 37 stores the image signal output from the selection output circuit 36, and C
The image signal is output to the PU 30. The CPU 30 calculates the image signal output from the image memory 37 based on the program stored in the EPROM 39. Also,
When printing the read image on paper, the image data is sent from the image memory 37 to the printer 2 via the printer interface 38.

Before outputting the image data to the printer 2,
The preliminary scan (pre-scan) determines the exposure amount in the main scan, that is, the optimum density, and also determines the size of the original image on the film. At that time, the image signal is stored in the image memory 37 by the preliminary scan, and the size of the original image is A3 based on the stored image signal.
Or A4 or B4? B
It is determined whether it is 5.

FIG. 5 is a diagram showing a state in which the image projected on the microfilm F is projected on the screen 11. There are a left reference stop mode and a center reference stop mode as methods for stopping the image projected on the microfilm F at a predetermined position on the screen 11. FIG. 5A shows A
FIG. 5B shows a state in which a 4-size document image is stopped and projected on the clean 11 in the left reference stop mode.
The size image is stopped in the left reference stop mode or the center reference stop mode, and FIG. 5C shows the A4 size original image stopped in the center reference stop mode. As shown in FIG. 5A, when an A4 size image is projected on the screen 11 in the left reference stop mode, it is determined by the preliminary scan that two A4 images are projected, and both images are projected. May be printed out on paper one by one, or after the size of only the left one is discriminated and one image is printed out, A
After moving the image to the left by one image in FIG.
The image on the right side in (A) may be printed out.

Films on which an original image is imprinted include positive film and negative film. When imprinted on a positive film, a portion on which characters and the like are imprinted becomes black, and a base portion of the film is imprinted. Is white. On the contrary, in the case of being printed on a negative film, the portion on which characters and the like are printed is white, and the background portion of the film is black. A method of determining the size of the original image projected on the screen 11 will be described with reference to FIG.
Note that, in FIG. 6, the portion of the image area projected on the screen 11 is shown with hatching. When a preliminary scan is performed by the line sensor S, FIG.
In, the line sensor S is scanned and moved from the right side to the left side of the screen 11 as shown by the arrow, and, for example, the sampling data is taken in from the position of PS1 to the position of PS2. With the scanning movement of the line sensor S, first, at the position corresponding to the right end portion of the projected image in FIG. 6, the image information data is black to white (in the case of a positive film) or white to black (in the case of a negative film). The point Ai (i = 1 to n) that changes to (case) is searched. Next, the CCD element corresponding to each point searches for a point Bi (i = 1 to n) at which the image information data changes from white to black or from black to white at the position corresponding to the left end in FIG. To do.

Next, the obtained distance LHi (i = 1 to n) between the points Ai and Bi, that is, the distance in the scanning direction, that is, the sub-scanning direction in FIG. 6, is obtained. If the calculated average value LH of the distances LHi is larger than the threshold value stored in the EPROM 38, it is determined that the image size is A3 or B4, and if it is smaller, the image size is A4 or B5. It is determined that When determining whether the threshold is A3 or A4, the threshold is set to a value slightly larger than the length of the short side of A4, and B
4 or B5, in the case of determining whether or not B5
Is set to a value slightly larger than the length of the short side of the. In FIG. 6, the points corresponding to the upper end of the projected image are A1 and B1, and the points corresponding to the lower end are An and Bn. The line sensor S has CCDs at positions outside each point.
Although the element is arranged, the element at that position does not pass through the image area, and therefore the change point of the data is not detected in the case shown in the figure.

In the image forming apparatus shown in the figure, when printing the image projected on the screen 11, the size of the paper may be specified manually, and the size of the image detected by the line sensor S may be selected. It is also possible to automatically select the paper size. When the paper size is automatically selected, for example, if the document image size is A4, it is printed on A4 size paper, and if the document image size is B5, it is printed on B5 size paper. Will be done. Further, in the illustrated image forming apparatus, the operator can select the size of the paper loaded in the printer 2 from A series (A series paper group) or B series (B series paper group). When the A series is selected, the A that constitutes the A series
The image is printed out on a 3 size paper or an A4 size paper. Similarly, when the B series is selected,
The printout is made on a B4 size paper or a B5 size paper forming the B series. Therefore, when the A series is selected, the image projected on the film F is A
The image is printed on a 4 size or A3 size paper. For example, if the image projected on the screen 11 is a B5 size document image, the image is printed on an A4 size paper. As a result, the length of one side of the printed paper is the same, which facilitates filing of the printed paper.

Next, the scanning procedure of the illustrated image forming apparatus will be described with reference to the flow charts shown in FIGS. As shown in FIG. 7, when the power of the device is turned on, first, the CPU 30 and the like are initialized in step S1. In step S2, it is determined whether the automatic paper selection key 22 has been turned on by the operator. If YES is determined in this step S2, it is determined in step S3 whether or not the self-selection flag is already turned on. If it is already turned on, the self-selection flag is set in off in step S4. If NO is determined in step S5, the self-selection flag is set to ON in step S5. This self-selection flag is a flag that indicates whether or not the automatic paper selection mode has been set. If the automatic paper selection key 22 is turned on while the automatic paper selection mode is set, the automatic paper selection mode is released. If the automatic paper-sheet selection key 22 is turned on while this mode is not set, this mode is set.

Next, in step S6, the paper selection key 23
It is determined whether or not is turned on, and in this step S6, Y
If it is determined to be ES, it is determined again in step S7 whether or not the self-selection flag is turned on. This step S
If YES is determined in 7, it is determined in step S8 whether or not the series flag is set to A. The series flag is a flag indicating whether the A series paper cassette is selected as the paper size or the B series paper cassette is selected. If the series flag has already been set to the A series, step S9 is performed. If the series flag is set to B series in step S8 and NO is determined in step S8, step S1
At 0, the series flag is set to the A series. When the A series is set in this way, A3 and A for the A series are set.
If the paper of No. 4 is prepared, both the LED 25a for A3 and the LED 25b for A4 shown in FIG. 3 are turned on. As a result, the operator can confirm the designated series by lighting the LED, and can prevent printing mistakes in advance. Further, in the automatic paper selection mode, the paper series, that is, the paper group, is changed every time the paper key 23 is pressed, so the paper selection key 23 used for selecting paper in the normal print mode is pressed. As a result, the paper series can be switched without providing a separate key.

If NO is determined in step S7, the paper selection key 23 has been operated, but the automatic paper selection mode has not been set. In this case, in step S11, the paper feed port number n. Is incremented by 1. Therefore, for example, when four paper feed cassettes 4 to 7 are provided in the printer 2 as shown in FIG. 1, each time the paper selection key 23 is pressed, the other paper feed cassettes are placed in a predetermined order. Will be selected. For example, if the number of paper feed cassettes is four as shown in the figure and the paper in the lower paper feed cassette is selected every time the paper selection key 23 is pressed,
If nmax = 4 and n exceeds the number of 4 (nmax), n
Is set to 1 so that the paper in the uppermost paper feed cassette is selected and the paper feed port is circulated and designated (step S
12, S13).

If it is determined in step S14 that the print key 21 is turned on, it is determined in step S15 whether the self-selection flag is turned on. This step S
If it is determined NO in 15, that is, if the self-selection flag is not turned on, it means that the operator manually selects the paper size, and the paper in the paper feed cassette already set in steps S11 to S13 is It is specified in step S16. Then, in step S17, the reading of the image and the printing operation of the read image on the sheet are executed.

If YES is determined in step S15,
This is the case when the automatic paper selection mode is set, and the subroutine of the automatic paper selection mode shown in step S18 is executed. FIG. 9 shows a subroutine of the operation of reading an image and printing the image in the automatic paper selection mode. First, in step S21, a preliminary scan operation is executed to detect the position of the image projected on the screen 11 and the like. Next, it is determined in step S22 whether the series flag is set to the A series or the B series. If the operator selects the B series paper, in step S23 the image size is recognized based on the prescan (preliminary scan) data and the image size is small, that is, B5, or large, that is, B4. It is identified if there is. Similarly, if the paper of A series is selected, the size of the image is small, that is, A4 size, or large, that is, A, in step S24.
Whether the size is 3 is identified.

In step S25, the size of the image is judged to be either the paper feed port of the paper feed cassette containing the B5 size paper or the paper feed port of the paper feed cassette containing the B4 size paper. Is set (steps S26, S2
7). Similarly, in steps S28 to S30, A
4 size paper or A3 size paper is set. In step S31, a main scan for reading an image and a printing operation for the image are performed on the set sheet. During the main scan, the line sensor S is moved in the opposite direction to that during the preliminary scan.

When the operator presses the automatic paper selection key 22 after printing is completed, the automatic paper selection mode is canceled,
The mode is returned to the normal print mode for the designated paper, and only one LED that indicates the size of the paper is turned on. When the paper in each paper feed cassette becomes empty, the LED 26 for paper empty display lights up, and the LED corresponding to the empty paper blinks.
In the automatic paper selection mode, a plurality of LEDs corresponding to a plurality of papers forming the same series are lit up. Therefore, when the paper becomes empty, even if the LED 26 for empty display is lit up, any paper is fed. Although the operator does not know whether the paper in the cassette is empty, the operator can easily know the empty paper by blinking the LED corresponding to the empty paper as described above. You can

In the illustrated apparatus, one group is composed of A4 and A3 sheets to form an A series, but letter size paper or legal size paper is added to this A series to form an A series. You may do it. The groups to be set include the A series and B described above.
The number of groups is not limited to two, and three or more groups may be prepared. Further, the set group may be set such that the operator configures a plurality of arbitrary sheets as one group without being based on the series of sheet sizes. For example, if the operator can set a plurality of frequently used sheets as one group, the operability of the apparatus is improved. In order to enable such a setting, it is preferable to set a special function mode so that the operator cannot easily operate it.
Further, a dip switch is provided on the substrate for the control circuit, and the switch is used as a selection means for selecting a paper group so that a normal operator can select only the A-series paper group. good.

Next, another embodiment of the present invention will be described. For example, when an image of an original document printed on a film at a magnification of 1/25 is projected on the screen 11 at a magnification of 25, an image of an A4 size original is A4 size and an image of a B5 size original is B5. Size of screen 1
Projected to 1. FIG. 10A shows a state in which an image of an A4 size original is projected on the screen 11 in an A4 size with a projection magnification of 25 times, and FIG. 10B shows an image of a B5 size original with the same projection magnification. On screen 11 B
The state projected by the size of 5 is shown.

The screen 11 shown has a size capable of projecting an image in A3 size, and a B5 size original image imprinted at a magnification of 1/25 times is displayed on the screen 11 in a size close to A4 size. It can be projected. FIG. 11B shows a state in which an image of a B5 size original image printed on the film at a magnification of 1/25 times is projected on the screen 11 at a magnification of about 29 times. FIG. 11 (A)
11A and 11B show a case where an A4 size original is projected at a projection magnification of 25 times, as in FIG. 10A.
As you can see from the comparison with (B), the B5 size original is A
It is projected on the screen in a size similar to the 4 size. As a result, the operator can easily see the document on the screen 11.

Generally, only one series of originals is printed on one microfilm, for example, only the series A. The operation panel 20 is provided with an input key for inputting a film type as to whether an A series image or a B series image is imprinted on the microfilm loaded in the scanner 1. There is. Therefore, the operator can input the type of the loaded film.

Therefore, if the microfilm F on which the B-series image is imprinted is loaded and the operator selects the A-series paper, the projection magnification is set to 29 times as shown in FIG. A drive signal is sent from the control circuit to the projected projection lens 15. in this way,
The projection magnification may be changed by the projection lens or the zoom lens. In this case, it is determined whether the image projected on the screen by the line sensor S is A3 size or A4 size, and the image is printed on the corresponding paper. That is, if the threshold value of the size LHi of the image on the screen 11 is set to a value slightly longer than the length of the A4 short side, if it is determined whether the value is larger or smaller than that, the magnification is 1/25 times. B5 imprinted
Alternatively, if a film on which a B4 size image is imprinted is loaded and the operator selects A series paper, A
The image is printed on a 4 or A3 size sheet.

As shown in FIG. 11B, even when the B-series image is projected on the screen 11 in the size of A4 or A3, the B-series image is recorded as described below. It is also possible to print on paper. In this case, B4 or B5 size originals are projected on the screen 11 in the size of A3 or A4, and if the designated paper size is B series, B
It is necessary to carry out optical or electrical scaling in order to output to a 4 or B5 sheet.

A method of obtaining the scaling factor in this case will be described. The average value LH of the length of the projected image on the screen 11 in the left-right direction, that is, the length of the line sensor S in the sub-scanning direction is calculated by the following equation as shown in FIG. LH = {LH (1) + ... + LH (n)} / n The vertical size of the image projected on the screen 11, that is, the size of the image in the main scanning direction of the line sensor S is as shown in FIG. At each scan position, the points at which the image information data changes from black to white or from white to black are points Ai (i = 1 to n) and Bi (i at the upper and lower ends of the image.
= 1 to n). Both points Ai, B
The vertical distance LVi of the projected image area in each line is obtained from the element distance between i, and the average value LV of the distances is obtained by the following equation. LV = {LV (1) + ... + LV (n)} / n As shown in FIG. 13, when the horizontal dimension of the paper P on which the image is printed is PH and the vertical dimension is PV, And the size of the projected image on the screen 1
The scaling factor is calculated as follows from the relationship with the size of the paper on which the image is output. If the desired scaling factor is α, then α = LV / P when LH / PH ≧ LV / PV
V, and when LH / PH <LV / PV, α = LH
/ PH. As described above, the scaling ratio obtained by the ratio of the horizontal length LH of the image on the screen 11 and the horizontal length PH of the paper, the horizontal length LV of the image, and the vertical length of the paper. The PV is compared with the scaling ratio determined by the ratio to PV, and the smaller scaling ratio is adopted.

The control circuit for obtaining the scaling factor is as follows:
This is as shown in FIG. In this control circuit, the same parts as those in the control circuit shown in FIG. 4 are designated by the same reference numerals. As shown in FIG. 14, the control circuit has a scaling circuit 42, and the scaling ratio is set in the scaling circuit 42 by a scaling signal from the CPU 30. In this way, the image forming procedure for obtaining the scaling factor will be described with reference to the flowchart shown in FIG.

In step S41, the preliminary scanning operation is executed, and in step S42, the horizontal length LH and the vertical length LV of the image on the screen 11 described above.
Is required. Based on this calculation result, step S
At 43, it is determined whether the image on the screen 11 is larger or smaller than the set threshold value that is slightly larger than the A4 size, that is, the size of the projected image, that is, whether the projected image is the A4 size or the A3 size. And step S4
In 4, the operator operates the operation panel 20 to determine whether or not the A series is selected as the output paper size. The case where YES is determined in this step S44 is the case where the operator selects the A series paper, and the case where it is determined to be NO is the case where the B series paper is selected. S45, S46
Proceed to.

In these steps, the step S4
Depending on the size of the projection image determined in step 3, step S4
7 to S50 are executed, and a predetermined size is selected as the paper on which the image is output. In step S51, the above-described scaling ratio α is determined, and the determined scaling factor is the scaling circuit 4.
2 is set in step S52, and the output information of the line sensor S is complemented or thinned out in the main scanning direction. Then, in the sub-scanning direction, step S
At 53, the scanning speed of the line sensor S is set according to the scaling ratio. In step S54, the image reading and the printing operation by the main scan are executed, and the image is printed on the paper of the size designated by the operator.

Although the above-described embodiment is a case where the present invention is applied to a microfilm scanner, it can be applied to a reader printer in which a printer is integrally assembled. The present invention can be applied to a copying machine as well as a scanner or a printer.

[0038]

As described above, when a manuscript image is instructed under the condition that the operator has selected a paper group, one of the sizes in the paper group is selected according to the size of the manuscript. Because it is printed on the paper,
The size of the paper to be printed is one of the plurality of papers selected by the operator, and the operability of the operator during image formation is easy.

[Brief description of drawings]

FIG. 1 is an external view showing a digital microreader printer to which an image forming apparatus of the present invention is applied,

2 is a cross-sectional view showing the internal structure of the microfilm scanner shown in FIG. 1,

3 is a front view of the screen shown in FIG. 2,

FIG. 4 is a block diagram showing a control circuit of the image forming apparatus,

FIG. 5 is a front view showing a state in which an image imprinted on a microfilm is projected on a screen,

FIG. 6 is a front view showing a method for discriminating the lateral size of an original image,

FIG. 7 is a flowchart showing an operating state of the image forming apparatus,

FIG. 8 is a flowchart showing an operating state of the image forming apparatus,

9 is a flowchart showing a subroutine of the automatic paper selection mode shown in FIG.

FIG. 10 is a front view showing a state in which an image projected on a microfilm is enlarged and projected on a screen,

FIG. 11 is a front view showing a state in which an image projected on a microfilm is enlarged and projected on a screen,

FIG. 12 is a front view showing a method for determining the size of a document image in the vertical direction,

FIG. 13 is a front view showing a sheet,

FIG. 14 is a block diagram showing a control circuit of the image forming apparatus in the case of obtaining a scaling factor;

FIG. 15 is a flowchart showing an operating state of the image forming apparatus when an image is formed on a sheet having a size different from the size of the original image.

[Explanation of symbols]

1 ... Micro film scanner, 2 ... Laser beam printer, 3 ... Digital micro reader printer,
4 to 7 ... Paper feed cassette, 11 ... Screen, 20 ... Operation panel, 21 ... Print key, 22 ... Automatic paper selection key, 23 ... Paper selection key, 30 ... CPU, 37 ... Image memory, F ... Film, S ... Line sensor.

Claims (2)

[Claims] 1. A group selection means for selecting one paper group from a plurality of paper groups each composed of a plurality of papers of different sizes, and a judgment means for judging the size of an image of a document. And an image forming means for selecting a specific paper from a plurality of sizes of papers belonging to the paper group selected by the group selecting means according to the result of the judgment by the judging means. apparatus. 2. A group selection means for selecting one paper group out of a plurality of paper groups each composed of a plurality of papers of mutually different sizes, and an enlarged image of an original image printed on a microfilm. A projection unit that projects the image on the screen by changing the size of the image on the basis of the screen that is projected by the group selection unit and the paper group selected by the group selection unit, and the size of the image projected on the screen. Discriminating means for discriminating on the screen, and paper selecting means for selecting a specific paper from among plural sizes of papers belonging to the paper group selected by the group selecting means according to the discrimination result of the discriminating means. An image forming apparatus comprising: