JP2001018473A - Imaging apparatus, imaging method and computer readable recording medium recording imaging program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make printable even when a sheet of designated size is not set by selecting a sheet larger than a designated size among sheets set in a sheet feed means and adjusting surface and rear print positions such that the print faces are aligned on the surface and rear. SOLUTION: An automatic sheet select/print function is executed when it is set effectively. More specifically, a sheet larger than a designated size and closest to the designated size is selected as a print sheet among sheets set in a printer 1. Frame data conforming to the designated size is then synthesized with image data from a personal computer 9 and further synthesized with additional margin data before being stored in an RAM 12 as print data. Subsequently, print processing is executed to print the print data on a selected sheet.

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 printer for forming an image on paper.

[0002]

2. Description of the Related Art Some image forming apparatuses such as printers and copiers have a plurality of paper supply ports for supplying sheets of different sizes.

In such an image forming apparatus, conventionally, when a sheet of a specified size is not set, the printing operation is usually stopped until a sheet of the specified size is set (that is, execution of a print job is stopped). Interrupted).

[0004]

However, in such a conventional image forming apparatus, when a sheet of a specified size is not set, all printing operations are performed until the sheet of the specified size is set. Is stopped, the subsequent print jobs are not executed, and all print jobs are delayed. For example, if a print job specifying the B5 size is sent to a printer on which only A4 size paper is set, the print job is processed until B5 size paper is set on the printer (more strictly, Until the B5 size paper is set in the printer and printing on that B5 paper is finished), printing on the previous B5 paper is performed even if the next sent print job specifies A4 size. The printing is not started until is completed.

In order to solve such a problem, when there is no sheet of a designated size, the sheet is enlarged or reduced and printed on a sheet having a size close to the designated size among the currently set sheets. Although it is conceivable that the size of printed paper varies in this case (for example, see Japanese Patent No. 2,693,461), there is a problem that it is difficult to organize printed paper in filing. there were.

In addition, when double-sided printing is performed on a sheet larger than a designated size sheet, the printing position may not be coincident between the front side and the back side, and there is a problem that it is difficult to make a file.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems of the prior art, and can print even when paper of a specified size is not set, and further obtains a print result which is easy to file. It is an object of the present invention to provide an image forming apparatus and method capable of performing the method, and a computer-readable recording medium that stores an image forming program.

[0008]

The above object of the present invention is achieved by the following means.

(1) In an image forming apparatus according to the present invention, in an image forming apparatus for forming an image on a sheet, a sheet feeding means for supplying sheets of different sizes and a setting for setting an image output mode on the sheet. Means, and determining means for determining whether a sheet of a designated size is set in the paper feeding means,
When double-sided printing is set as the image output mode, and a sheet of a specified size is not set in the sheet feeding unit,
Adjusting means for selecting a sheet having a size larger than a designated size from the sheets set in the sheet feeding means and adjusting the printing positions of the front and back surfaces so that the printing surface coincides with the front and back surfaces. It is characterized by having.

(2) The adjusting means further adjusts the printing position according to the paper passing direction.

(3) The adjusting means further adjusts the printing position according to the sheet binding margin position.

(4) When printing on paper of a size larger than the specified size, there is a synthesizing means for synthesizing frame data matching the specified size with image data.

(5) When printing on paper of a size larger than the specified size, there is provided a synthesizing means for additionally synthesizing margin data of a difference between the specified size and the size of the selected paper with the image data.

(6) In the image forming method according to the present invention, in the image forming method for forming an image on a sheet, it is determined whether or not a sheet of a designated size is set in a sheet feeding means for supplying a sheet of a different size. The step of judging, and if the double-sided printing is set as the image output mode and the paper of the specified size is not set in the paper feeding unit, the size larger than the specified size is selected from the papers set in the paper feeding unit. And adjusting the printing positions of the front and back surfaces so that the printing surface matches the front and back surfaces.

(7) A computer-readable recording medium according to the present invention is a computer-readable recording medium on which an image forming program for forming an image on a sheet is recorded. A process of determining whether or not a sheet of a specified size is set; and a case where double-sided printing is set as an image output mode and a sheet of the specified size is not set in a sheet feeding unit.
Selects a sheet of paper larger than the specified size from the sheets set in the paper feeder, and adjusts the print position on the front and back sides so that the print side matches the front and back sides. It records an image forming program to be executed.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. Here, a printer will be described as an example of the image forming apparatus.

FIG. 1 is a schematic view of a printer to which the present invention is applied.

The printer 1 has a plurality (here, three).
Paper feed ports 2a, 2b, and 2c, and can set sheets of different sizes. In the illustrated example, A4 size paper is set in the paper feed port 2a.
A sheet of B4 size is set in b, and a sheet of A3 size is set in the paper feed port 2c. The sheet on which the image has been formed (printed) is discharged to the discharge port 3. Further, the printer 1 can designate double-sided printing as an image output mode.
It is attached to the side. On the upper surface of the printer 1,
An operation panel 5 is provided.

FIG. 2 is an external view of the operation panel 5.

The operation panel 5 has a touch panel type liquid crystal display section 6 capable of displaying a message and an online key 7 for turning on / off a connection with an external device such as a personal computer (that is, switching between online / offline). And a function of automatically selecting paper of a size larger than the specified size and printing in a predetermined appropriate form when there is no paper of the specified size according to the present invention (hereinafter referred to as “paper automatic selection printing function”). A setting switching key 8 for enabling or disabling (that is, turning the setting on and off) is provided.

Each time the online key 7 is pressed once, the online key 7 is switched between an online state (a state where the apparatus is connected to an external device) and an offline state (a state where the apparatus is not connected to an external apparatus). An indicator (e.g., LED) 7a of the online key 7 is turned on when online and turned off when offline.

Further, the user can manually set various layouts by using the setting switching key 8 and the liquid crystal display unit 6. The layout setting performed by the printer 1 includes setting items such as the above-described paper automatic selection printing function, double-sided printing (printing on both sides of one sheet), paper size, enlargement / reduction, and the like. The automatic paper selection printing function is set by the setting changeover key 8, and the others are set by the liquid crystal display 6.
Is set by

FIG. 3 is a block diagram showing an example of the configuration of a system using the printer 1.

This system is configured so that image data created and edited by an external personal computer 9 is printed out by the printer 1. The printer 1 includes the operation panel 5, the CPU 10, and an R for storing a program.
OM11 and received print job (including image data)
RAM 12 for temporarily storing data such as data, an image processing unit 13 for performing various image processing such as a paper automatic selection printing function and double-sided printing, and a printing unit 14 for printing image data on paper according to the contents of a print job. And a parallel interface (I / F) unit 15 and a network card 1 for receiving a print job from the personal computer 9 and generally transferring commands and data to and from the personal computer 9.
6 and these parts are interconnected by an internal bus 17. The personal computer 9 also has a printer 1
A parallel interface (I / F) unit 18 and a network card 19 for transmitting a print job to the printer 1 and for generally transferring commands and data to and from the printer 1 are provided. Therefore, the printer 1 and the personal computer 9 are connected by a parallel interface or a network, and the image data to be printed from the personal computer 9 is sent to the printer 1 by this.

In the printer 1, when the automatic paper selection printing function is set to be valid, if there is no paper of the specified size, a paper having a size larger than the specified size is automatically selected and the image data is magnified. And print a frame for cutting to the specified size.If double-sided printing is specified, the print position on the front and back sides is automatically adjusted appropriately, and Correct double-sided printing results are obtained.

FIGS. 4 to 9 are flowcharts showing the operation of the printer 1 to which the present invention is applied. In particular, FIGS.
6 is a main flowchart, FIG. 7 is a flowchart showing the contents of the subroutine of the reference position selection processing of FIG. 5, and FIG. 8 is a flowchart showing the contents of the subroutine of the short edge feed processing of FIG. FIG. 9 is a flowchart showing the contents of the subroutine of the printing process of FIG.

Hereinafter, the operation of the printer 1 will be described with reference to the flowcharts of FIGS. Here, for convenience, the case of single-sided printing and the case of double-sided printing will be described separately.

<In the case of single-sided printing> When data of a print job (including image data) is received from the personal computer 9 while the power of the printer 1 is turned on and the printer 1 is set to the online state (S101). Until the reception of this data is completed (S102: YES), the data reception process of step S101 is repeated.

When the reception of the data from the personal computer 9 is completed, the received data is analyzed, the image data included in the print job is stored in the memory (RAM 12) (S103), and the output paper size information is output from the header of the print job. (Printed size information) is extracted (S104).

Then, the designated size extracted in step S104 is compared with the paper size currently set in the printer 1 to determine whether or not there is a designated size paper, ie, the designated size paper is It is determined whether or not it is set (S105).

If there is paper of the designated size (S10
5: YES), the designated size is designated as a paper feed size (S106), and print processing is executed (S107).
The details of the print processing in step S107 will be described later.

If there is no paper of the designated size (S10
5: NO), whether the automatic paper selection printing function, that is, the function of automatically selecting paper of a size larger than the specified size and printing in a predetermined appropriate form when there is no paper of the specified size, is valid or invalid. Is checked (S108). Whether the function is enabled or disabled can be set by the user himself from the setting switching key 8 on the operation panel 5 as described above.

If the automatic paper selection printing function is disabled (S108: NO), a message indicating that printing cannot be performed because there is no designated size is displayed on the liquid crystal display unit 6 of the operation panel 5, and the printing operation is stopped. (S109). Then, the operation is not resumed until the user replenishes or sets paper of the designated size (S110: YES), and the printing process is not performed.

If the automatic paper selection printing function is set to be valid (S108: YES), this automatic paper selection printing function is executed in step S111 and thereafter. That is,
First, a sheet having a size larger than the designated size and closest to the designated size is selected as a print sheet from the sheets set in the printer 1, and the size of the selected sheet is designated as a sheet feeding size (S111). .

Next, frame data matching the designated size is created (S112), and the frame data created in step S112 is combined with the image data sent from the personal computer 9 (S113).

At this time, the margin on the designated size has already been created at the time of being sent from the personal computer 9, and the frame data including the margin is created. This will be described with reference to FIG. 10. From the personal computer 9, a margin b is added to the image area a and transmitted as image data, and the above-described frame data is created including the margin b. That is, in steps S112 and S113, frame data is created and combined with the entire transmitted image data.

Then, it is determined whether or not double-sided printing is set (S114).

If single-sided printing is set instead of double-sided printing (S114: NO), printing is performed on a sheet of a size larger than the specified size. The margin data of the difference from the image data is additionally combined with the image data on the basis of, for example, the upper right (S116) (see FIG. 10).

At this time, the reference position (in other words, the layout position of the image data) at the time of additionally synthesizing the margin data is set to one of the four corners of the image data in order to reduce the number of cuts. It is preferable to synthesize an additional margin portion in the vicinity of That is, for example,
If the designated size is A4 but A4 size paper is not set and printing is performed on B4 size paper, as an example, as shown in FIG. When the image data is combined, it is necessary to cut the four sides of the upper, lower, left and right. However, as shown in FIG. 11B, when the image data is adjusted to the upper right (of course, the lower right, upper left, and lower left are also adjusted). Similarly, a desired size (A4) can be obtained only by cutting two sides. Therefore, in the example of FIG. 10, the margin e to be added is synthesized based on the upper right.

Thereafter, data (synthesized data) obtained by synthesizing the frame data and the additional margin data with the image data is stored in the memory (RAM 12) as print data (S10).
117), print processing is executed (S107), and the print data (synthesized data) is printed on the paper selected in step S111. The details of the print processing in step S107 will be described later.

The user who instructed printing from the personal computer 9
By cutting the result (printed paper) printed out from the printer 1 along the printed frame, a print result of a desired paper size can be obtained.

<In the case of double-sided printing> In the case of double-sided printing, the processing from step S101 to step S113 is completely the same as in the case of single-sided printing, and a description thereof will be omitted.

It is determined in step S114 whether double-sided printing has been set. If double-sided printing has been set (S114: YES), it is further determined whether or not backside printing has been performed (S115). In the case of front side printing instead of back side printing (S115: NO), since the printing itself is exactly the same as in the case of single side printing, the designated size and the size of the paper selected in step S111 are the same as in the case of single side printing. Is added to the image data, for example, on the basis of the upper right (S116), and the obtained combined data is stored in the memory (RAM 12) as front side print data (S117). Execute (S107), and print the front side print data (synthesized data) on the sheet selected in step S111.

On the other hand, in the case of back side printing (S11
5: YES), when combining the additional margin, there is a difference from the case of single-sided printing. That is, it is necessary to appropriately adjust the printing position on the front surface and the back surface according to the printing surface. In the case of double-sided printing, if the front side and the back side are both moved in the same direction (for example, upper right) and a margin is additionally combined, the left-right direction of the final printed out result (double-sided printed paper) is obtained. Alternatively, it cannot be cut in the vertical direction. Therefore, if it is determined in step S115 that back printing is to be performed, a reference position is selected, and specifically, the vertical and horizontal directions of the image (portrait / landscape) and the binding position (long side binding / short side binding). And the reference position is changed according to the paper passing direction (long edge feed / short edge feed) to control to obtain a correct double-sided printing result (S118).

Here, the definitions of the terms are as follows.
A portrait is a case in which an image is formed in a portrait orientation on a portrait paper, that is, a case in which the portrait orientation of the paper matches the portrait orientation of the image. On the other hand, when the image is formed horizontally, that is, when the vertical direction of the paper and the vertical direction of the image are at right angles, the long side binding is the case where the binding is performed on the long side of the paper, and the short side binding is performed. Means binding on the short side of the paper,
Long edge feed is when the paper is fed with the long side of the paper first, and short edge feed is
This is a case where the paper is fed with the short side of the paper at the top.

Hereinafter, the reference position selecting process in step S118 will be specifically described with reference to FIGS.

First, the case of portrait will be described.

For example, in the case of portrait / long-edge binding / long-edge feed, the result of double-sided printing when both sides are controlled to be shifted to the upper right is shown in FIG.
As shown in FIG. In this case, as shown in the figure, the cut position in the vertical direction matches on the front surface and the back surface, but since the cut position in the horizontal direction is different on the front surface and the back surface, after all,
You cannot cut left and right. Therefore, in the case of this portrait / long side binding / long edge feed, FIG.
As shown in FIG. 3, when the front surface is shifted to the upper right (upper left reference) and additional margins are combined, the back surface needs to be shifted to the upper left (upper left reference) to combine additional margins. This allows
Since the cut position of the double-sided printing result coincides with the vertical and horizontal directions, it can be cut to the designated size, and correct printing results can be obtained on both sides.

In the case of portrait / long-edge binding / short-edge feed, as shown in FIG. 14, when the surface is shifted to the upper right (referenced to the upper right) and a margin is additionally synthesized,
In order to match both the vertical direction and the horizontal direction, it is necessary to combine the additional blank portion with the back surface shifted to the upper left (upper left reference) and rotate the image direction by 180 degrees.

In the case of portrait / short edge binding / long edge feed, as shown in FIG. 15, when the surface is shifted to the upper right (referenced to the upper right) and a blank portion is additionally synthesized, both vertical and horizontal directions are used. In order to match, it is necessary to bring the back side to the upper left (based on the upper left), synthesize an additional margin, and rotate the direction of the image by 180 degrees.

In the case of portrait / short edge binding / short edge feed, as shown in FIG. 16, when the surface is shifted to the upper right (upper right reference) and a margin is additionally synthesized,
In order to match both the vertical and horizontal directions, the back surface needs to be shifted to the upper left (upper left reference) to synthesize an additional margin portion.

Next, the case of landscape will be described.

For example, in the case of landscape / long side binding / long edge feed, the result of double-sided printing when both sides are controlled to be shifted to the upper right is shown in FIG.
As shown in FIG. In this case, as shown in FIG.
Although the cut position in the left-right direction matches on the front surface and the back surface, since the cut position in the vertical direction is different between the front surface and the back surface, the vertical position cannot be cut after all. Therefore, in this case, as shown in FIG. 18, when the front surface is shifted to the upper right (upper left reference) to additionally synthesize a margin, it is necessary to shift the rear surface to the upper left (upper left reference) to synthesize an additional margin. is there. As a result, since the cut position of the double-sided print result coincides with the vertical and horizontal directions, it is possible to cut to the designated size, and correct print results are obtained on both sides.

In the case of landscape / long side binding / short edge feed, as shown in FIG. 19, when the surface is shifted to the upper right (upper right reference) and a margin is additionally synthesized, the vertical and horizontal directions are aligned. For this purpose, it is necessary to combine the additional margin by shifting the back side to the upper left (upper left reference) and to rotate the direction of the image by 180 degrees.

In the case of landscape / short edge binding / long edge feed, as shown in FIG. 20, when the surface is shifted to the upper right (referenced to the upper right) and the margin is additionally synthesized,
In order to match both the vertical direction and the horizontal direction, it is necessary to combine the additional blank portion with the back surface shifted to the upper left (upper left reference) and rotate the image direction by 180 degrees.

Also, in the case of landscape / short edge binding / short edge feed, as shown in FIG. 21, when the surface is shifted to the upper right (upper right reference) and a blank portion is additionally synthesized, the vertical and horizontal directions are aligned. Therefore, the back surface needs to be shifted to the upper left (upper left reference) to synthesize an additional blank portion.

The above is described with reference to the subroutine flowcharts of FIGS. 7 and 8 as follows.

If the paper passing direction is a long edge feed (S20
1: YES), portrait and landscape of the image are portrait (S202:
If the binding position is the long side binding (S203: YES), as shown in FIG. 13, if the front surface is based on the upper right, the back surface is based on the upper left (S204).

If the paper passing direction is a long edge feed (S20
1: YES), portrait and landscape of the image are portrait (S202:
If the binding position is the short side binding (S203: NO), as shown in FIG. 15, if the front surface is based on the upper right, the back surface is based on the upper left (S205), and the orientation of the image is as shown in FIG. Is rotated 180 degrees (S206).

If the paper passing direction is a long edge feed (S20
1: YES), the image is landscape (S20)
2: NO), the binding position is long side binding (S207: YES)
In the case of, as shown in FIG. 18, when the front surface is based on the upper right, the back surface is based on the upper left (S208).

If the paper passing direction is a long edge feed (S20
1: YES), the image is landscape (S20)
2: NO), when the binding position is short side binding (S207: NO), as shown in FIG. 20, when the front surface is based on the upper right, the back surface is based on the upper left (S209), and the image is displayed. Is rotated 180 degrees (S210).

The paper passing direction is short edge feed (S2
In the case of (01: NO), the process proceeds to the short edge feed processing of step S211. Further, the portrait and landscape of the image are portrait (S301: YES), and the binding position is the long side binding (S301).
In the case of 302: YES), as shown in FIG. 14, when the front surface is based on the upper right, the back surface is based on the upper left (S30).
303) and rotate the direction of the image by 180 degrees (S
304).

Similarly, in the case where the paper passing direction is short edge feed (S201: NO), the vertical and horizontal directions of the image are portrait (S301: YES), and the binding position is short side binding (S30).
In the case of 2: NO), as shown in FIG. 16, when the front surface is based on the upper right, the back surface is based on the upper left (S30).
5).

Similarly, when the paper passing direction is the short edge feed (S201: NO), the image is landscape (S301: NO), and the binding position is the long side binding (S30).
6: YES), as shown in FIG. 19, when the front surface is based on the upper right, the back surface is based on the upper left (S30).
7) And rotate the direction of the image by 180 degrees (S30)
8).

Similarly, in the case where the paper passing direction is short edge feed (S201: NO), the vertical and horizontal directions of the image are landscape (S301: NO), and the binding position is short side binding (S30).
6: NO), as shown in FIG. 21, when the front surface is based on the upper right, the back surface is based on the upper left (S30).
9).

When the reference position for the back side printing is selected as described above, the margin data of the difference between the designated size for the back side and the size of the sheet selected in step S111 is selected in step S118. The image data is additionally synthesized with the image data according to the reference position (S119).

Thereafter, the obtained combined data is stored in the memory (RAM 12) as back side print data (S11).
7) The print process is executed (S107), and the back side print data (synthesized data) is printed on the front side printed paper.

The user who has instructed double-sided printing from the personal computer 9 cuts the result (printed paper) printed out from the printer 1 along the printed frame to obtain a double-sided printing result of a desired paper size. Obtainable.

Finally, the printing process in FIG. 4 is executed according to the flowchart shown in FIG.

First, it is determined whether or not double-sided printing is performed (S40).
1). If it is not double-sided printing, that is, if it is single-sided printing (S401: NO), print data is read from the memory (RAM12) (S402), and the print data is printed on the paper selected in step S111 (S40).
3).

In the case of double-sided printing (S401: YES),
Further, it is determined whether or not the printing is front side printing (S404). In the case of front side printing (S404: YES), the memory (RAM)
The front side print data is read from 12) (S405), and the front side print data is printed on the paper selected in step S111 (S406). If it is not front side printing, that is, if back side printing is performed (S404: NO), back side print data is read from the memory (RAM12) (S40).
7) The back side print data is printed on the front side printed paper (S408).

Therefore, according to the present embodiment, when paper of a designated size is not set in the printer 1, paper of a size larger than the designated size is automatically selected and printed. Even if there is no paper, the printer 1 does not stop. That is, the print jobs can be sequentially processed without being accumulated.

When printing on paper of a size larger than the specified size, a frame matching the specified size is printed. The user later cuts the printed paper along the frame to obtain the specified size. Paper.
This eliminates variations in the size of the printed paper and facilitates organizing the printed paper when filing it.

Further, in the case of additionally synthesizing a margin portion of the difference between the designated size and the size of the selected paper, the additional margin portion is synthesized by moving the image data to one of the four corners of the upper, lower, left and right. The number of cuts can be reduced,
A desired size can be obtained only by cutting two sides.

Further, especially when double-sided printing is instructed, the printing positions on the front and back sides are automatically adjusted so that the printing side is coincident between the front and back sides, so that the user can follow the frame later. Even in the case of cutting, a correct double-sided printing result can be obtained.

In the present embodiment, the printer 1 has been described as an example of the image forming apparatus, but the present invention is not limited to this. For example, the present invention is also applicable to digital copying machines, facsimile machines, and the like.

When a computer is used as described above, a recording medium (for example, a floppy disk) that allows the computer to read a print control program describing the above-described processing procedure (see FIGS. 4 to 9). The image forming apparatus (such as the printer 1) can be operated based on the recording medium recorded on a disc or a CD-ROM.

[0078]

As described above, according to the present invention,
If double-sided printing is set and paper of the specified size is not set, select paper of a size larger than the specified size, and adjust the printing position of the front and back sides so that the printing side matches the front and back sides. Adjustment, so even if there is no paper of the specified size, without stopping the device,
That is, it is possible to sequentially process the print jobs without accumulating the print jobs, and to always obtain a correct double-sided printing result.

When double-sided printing is set, the printing position is adjusted in accordance with the paper passing direction and the binding margin position. Therefore, it is possible to create a file that looks good and is easy to read.

When printing on paper of a size larger than the designated size and combining frame data with the designated size with image data, the user later cuts the printed paper along the frame. Thus, the paper of the specified size can be used, so that the size of the printed paper does not vary, and the printed paper can be easily organized when filed.

Further, when printing on paper of a size larger than the specified size, if margin data of the difference between the specified size and the size of the selected paper is additionally combined with the image data, the image data may be larger than the specified size. Printing on large-size paper can be easily performed.

[Brief description of the drawings]

FIG. 1 is a schematic view of a printer to which the present invention is applied.

FIG. 2 is an external view of an operation panel of FIG.

FIG. 3 is a block diagram illustrating a configuration example of a system using the printer of FIG.

FIG. 4 is a main flowchart showing the operation of the printer to which the present invention is applied.

FIG. 5 is a flowchart following FIG. 4;

FIG. 6 is a flowchart following FIG. 5;

FIG. 7 is a flowchart showing the contents of a subroutine of a reference position selection process of FIG. 5;

FIG. 8 is a flowchart showing the contents of a subroutine of the short edge feed processing of FIG. 7;

FIG. 9 is a flowchart showing the contents of a subroutine of the print processing of FIG. 4;

FIG. 10 is a diagram illustrating a configuration example of data obtained by combining a frame and an additional blank portion with image data.

11A and 11B are diagrams for explaining a reference position when a margin is additionally combined. FIG. 11A shows a case where the center is aligned, and FIG. 11B shows a case where the upper right is aligned. Is shown.

FIG. 12 is a diagram illustrating a double-sided printing result (NG) in the case of portrait / long-edge binding / long-edge feed in a case where control is performed such that both sides are shifted to the upper right and printed.

FIG. 13 is a diagram illustrating a double-sided printing result in the case of portrait / long-edge binding / long-edge feed in which printing is performed such that the front surface is shifted to the upper right and the rear surface is shifted to the upper left.

FIG. 14: In the case of portrait / long-edge binding / short-edge feed, control is performed such that the front surface is shifted to the upper right, the rear surface is shifted to the upper left, and the image on the rear surface is rotated by 180 degrees for printing. FIG. 9 is a diagram showing a double-sided printing result of FIG.

FIG. 15: In the case of portrait / short-edge binding / long-edge feed, control is performed such that the front surface is shifted to the upper right, the rear surface is shifted to the upper left, and the image on the rear surface is rotated by 180 degrees for printing. FIG. 9 is a diagram showing a double-sided printing result of FIG.

FIG. 16 is a diagram illustrating a double-sided printing result in the case of portrait / short-side binding / short-edge feed in which printing is performed such that the front surface is shifted to the upper right and the rear surface is shifted to the upper left.

FIG. 17 is a diagram illustrating a double-sided printing result (NG) in the case of landscape / long-side binding / long-edge feed in a case where printing is performed so that both sides are shifted to the upper right.

FIG. 18 is a diagram illustrating a double-sided printing result in the case of landscape / long side binding / long edge feed in a case where control is performed such that printing is performed with the front side shifted to the upper right and the back side shifted to the upper left.

FIG. 19 illustrates a case where landscape / long-edge binding / short-edge feed is controlled such that the front surface is shifted to the upper right and the rear surface is shifted to the upper left, and printing is performed by rotating the image of the rear surface by 180 degrees. FIG. 9 is a diagram illustrating a double-sided printing result.

FIG. 20 illustrates a case in which landscape / short-side binding / long-edge feed is controlled such that the front surface is shifted to the upper right and the rear surface is shifted to the upper left, and that the image on the rear surface is rotated by 180 degrees for printing. FIG. 9 is a diagram illustrating a double-sided printing result.

FIG. 21 is a diagram illustrating a double-sided printing result in the case of landscape / short edge binding / short edge feed in a case where control is performed such that printing is performed with the front surface shifted to the upper right and the rear surface shifted to the upper left.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Printer (image forming apparatus), 2a, 2b, 2c ... Paper supply port (paper supply means), 3 ... Paper discharge port, 4 ... Automatic duplex unit, 5 ... Operation panel (setting means), 10 ... CPU (judgment) Means, selection means, adjustment means), 11 ROM, 12 RAM, 13 image processing section (synthesis means), 14 printing section.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C087 BD07 CA03 CA04 CA05 CB07 CB12 CB13 DA17 2H027 FA03 FA13 FB14 FD01 FD03 FD08 5C072 AA03 BA02 NA01 RA01 RA04 WA02 XA04 9A001 BB03 DD13 HH24 HH28 HH34 JJ35 KK

Claims (7)

[Claims] 1. An image forming apparatus for forming an image on a sheet, a sheet feeding unit for feeding sheets of different sizes, a setting unit for setting an image output form on the sheet, and a designated size for the sheet feeding unit Determining means for determining whether or not paper is set, and when double-sided printing is set as an image output mode, and when paper of a designated size is not set in the paper feeding means,
Adjusting means for selecting a sheet of a size larger than a designated size from among the sheets set in the sheet feeding unit, and adjusting the printing position of the front and back surfaces so that the printing surface matches the front and back surfaces, An image forming apparatus comprising: 2. The printing apparatus according to claim 1, wherein the adjusting unit further adjusts a printing position in accordance with a paper passing direction.
The image forming apparatus as described in the above. 3. The printing apparatus according to claim 1, wherein the adjustment unit further adjusts a printing position according to a sheet binding margin position.
The image forming apparatus as described in the above. 4. A printing apparatus according to claim 1, further comprising a synthesizing means for synthesizing frame data conforming to the designated size with image data when printing on paper of a size larger than the designated size.
The image forming apparatus as described in the above. 5. When printing on paper of a size larger than the designated size, the image processing apparatus further comprises combining means for additionally combining margin data of a difference between the designated size and the size of the selected paper with the image data. The image forming apparatus according to claim 1. 6. An image forming method for forming an image on a sheet, wherein a step of judging whether or not a sheet of a designated size is set in a sheet feeding means for supplying sheets of different sizes, If printing is set and paper of the specified size is not set in the paper source, select a paper larger than the specified size from the paper set in the paper source, and print on the front side. Adjusting the printing positions of the front and back surfaces so that they coincide with each other. 7. In a computer-readable recording medium on which an image forming program for forming an image on a sheet is recorded, it is determined whether or not a sheet of a designated size is set in a sheet feeding means for supplying sheets of different sizes. If both sides printing is set as the image output mode and the paper of the specified size is not set in the paper feeding unit, the paper of the size larger than the specified size is selected from the paper set in the paper feeding unit. A computer-readable recording medium storing an image forming program for causing a computer to execute a process of selecting a sheet and adjusting a print position of the front surface and the back surface so that the print surface coincides with the front surface and the back surface.