JP2004001261A - Printer, its controlling method and program, and storage medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform print processing efficiently without stopping print operation even if a recording sheet of a size specified by a print command from a host computer cannot be fed, and to provide print results as close as those desired by a user. <P>SOLUTION: When a recording sheet conforming to a specified document size included in a perfecting command from a host computer 3000 cannot be fed, a CPU 12 feeds a recording sheet larger than the specified document size in order to print on the surface, measures the difference information between the specified document size and the size of the recording sheet thus fed, and then determines the print position on the back of the recording sheet based on the difference information thus measured before printing on the back. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a printing apparatus capable of receiving print information in response to a print command from a host computer and printing on both sides of a recording medium, a control method of the printing apparatus, a program, and a storage medium.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a printing apparatus such as a printer or a copying machine having a unit for feeding one or a plurality of recording papers, when a recording paper of a specified size is not set in a specified paper feeding direction, a message “paper exchange” is displayed. ”Or“ Print Check ”, etc., is displayed on the display panel of the printing device, or the same type of content is transmitted to the host computer to notify the user that the desired print result cannot be obtained in the current state. Had the means.
[0003]
Based on this notification, the user sets the recording paper specified by the print command in the printing apparatus, or forcibly performs a printing operation even if the paper size is not sufficient, and performs desired printing as shown in FIG. Either way, but not as a result, print information is obtained.
[0004]
FIG. 8 is a schematic diagram showing a correspondence between print data and an output result in a conventional printing apparatus, and corresponds to a case where one-sided print data is forcibly printed on a recording medium that does not have the print data and the paper size. I do.
[0005]
[Problems to be solved by the invention]
However, in a conventional printing apparatus, especially when the network is used, the printing apparatus is generally remote from the host computer. Even if the user can recognize a message from the printing apparatus, the printing apparatus takes an appropriate action. However, there is a problem that this results in a heavy burden.
[0006]
In addition, since the printing operation is stopped, there is a problem that a print command from another user cannot be processed and printing is delayed.
[0007]
Further, when the printing is stopped and the printing is forcibly performed, especially in the case of duplex printing, the feeding direction of the front side and the back side is reversed. And the printing result deviates from the allowable range, so that the printing result is excluded from the specifications of the printing apparatus, or even if it is a specification, the function is not practical.
[0008]
FIG. 9 is a schematic diagram showing a correspondence between double-sided print data and an output result in a conventional printing apparatus, in a case where the longitudinal direction of the paper is parallel to the paper transport direction, and designated in the double-sided print data. This corresponds to the result of forced double-sided printing (right and left binding) when the paper size does not match the actually fed paper size.
[0009]
When double-sided print data is forcibly double-sided printed on a recording medium that does not have the same paper size as the print data (however, the longitudinal direction of the paper is perpendicular to the paper transport direction as indicated by the arrow in the figure) However, as shown in the figure, the print position of the front (the position indicated by the broken line on the back) and the print position of the back significantly shift, resulting in a print result that deviates from the allowable range.
[0010]
FIG. 10 is a schematic diagram showing the correspondence between double-sided print data and an output result in a conventional printing apparatus, where the longitudinal direction of the paper is perpendicular to the paper transport direction, and designated in the double-sided print data. This corresponds to the result of forced double-sided printing (right and left binding) when the paper size does not match the actually fed paper size.
[0011]
When the double-sided print data is forcibly double-sided printed on a recording medium that does not have the same paper size as the print data (however, the longitudinal direction of the paper is parallel to the paper transport direction as indicated by the arrow in the figure) In the case of FIG. 10, similarly to the case shown in FIG. 9, the printing position of the front (the position shown by the broken line on the back surface) and the printing position of the back surface are greatly shifted as shown in the drawing, and the printing is out of the allowable range. The result has been.
[0012]
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the first to fifth inventions according to the present invention to provide a recording paper which conforms to a specification of a document size included in a double-sided printing instruction. If it is not possible to feed the recording paper, a recording paper larger than the designated original size is fed and the front side is printed, and the difference information between the designated original size and the size of the fed recording paper is measured. Based on the difference information, the printing position of the back side of the recording paper is determined, and the back side is printed, so that the printing information received by the double-sided printing command from the host computer and the state of the recording paper set in the printing apparatus are obtained. Accordingly, even when the recording paper of the size designated for printing cannot be fed to the printing apparatus (in the case of paper exhaustion, original setting, paper jam, etc.), the printing process is efficiently executed without stopping printing. It is possible to, is that the user provides a control method and a program, and storage medium of the printing apparatus and a printing apparatus capable of providing a printing result as close as possible to the print result desired.
[0013]
[Means for Solving the Problems]
A first invention according to the present invention relates to a paper feeding unit (a paper cassette 1508, a paper feeding roller 1509, a transporting roller 1510, a transporting roller 1511, an optional paper feeding not shown in FIG. 1) for feeding a single or a plurality of recording papers. Unit), detecting means (a plurality of sensors not shown, CPU 12 in the printer control unit 1000 shown in FIG. 2) for detecting the size of recording paper that can be fed from the paper feeding means, and In a printing apparatus having a printing unit (laser beam printer equipped with the duplex unit 1520 shown in FIG. 1) capable of performing double-sided printing on a recording sheet matching the specification of the document size included in the print instruction, the printing unit includes the printing instruction. If it is not possible to feed recording paper that matches the original size specification, feed recording paper larger than the specified original size and print the front side. A measuring unit (CPU 12 shown in FIG. 2) for measuring difference information between the designated original size and the size of the fed recording paper, and a recording paper based on the difference information measured by the measuring unit. Determining means (CPU 12 shown in FIG. 2) for determining the printing position on the back side.
[0014]
In a second invention according to the present invention, the measuring means includes difference information (the difference “A” shown in FIG. 4) in the short direction between the designated document size and the size of the fed recording paper, The difference means (difference "B" shown in FIG. 4) is measured, and when the paper transport direction is parallel to the longitudinal direction of the paper (feeding direction shown in FIG. 5), the determination means performs the measurement. The printing position of the leading end of the sheet in the sheet conveying direction on the back side is determined (such as the difference "B" shown in FIG. 5) based on the difference information in the longitudinal direction measured by the means, and the sheet conveying direction and the sheet longitudinal direction are determined. Is perpendicular (the paper transport direction shown in FIG. 6), the printing position of the leading edge of the paper in the paper transport direction on the back side is determined based on the difference information in the lateral direction measured by the measuring means (see FIG. 5). (Like the difference "A").
[0015]
According to a third aspect of the present invention, there is provided a paper feed unit for feeding one or a plurality of recording papers, a detection unit for detecting a recording paper size that can be fed from the paper feed unit, and a double-sided printing command. In a control method of a printing apparatus having a printing unit capable of performing double-sided printing on a recording sheet matching the specification of the document size included in the double-sided printing command, a recording sheet matching the specification of the document size included in the double-sided printing command is used. If the paper cannot be fed, a measuring step of feeding a recording paper larger than the designated original size and printing the front side, and measuring the difference information between the designated original size and the size of the fed recording paper (FIG. 3) (Steps S4 and S5) and a determination step (Steps S6 and S7 in FIG. 3) of determining a printing position on the back surface of the recording paper based on the measured difference information.
[0016]
According to a fourth aspect of the present invention, there is provided a program for executing the method of controlling a printing apparatus according to the third aspect.
[0017]
According to a fifth aspect of the present invention, a program for executing the method of controlling a printing apparatus according to the third aspect is stored in a storage medium readable by a computer.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
First, the configuration of a laser beam printer suitable for the printing apparatus of the present invention will be described with reference to FIG. The printer to which this embodiment can be applied is not limited to a laser beam printer, but may be any other printing method (for example, an LED method, a liquid crystal shutter method, an ink jet method, a thermal transfer method, a sublimation method, etc.) and an optical system. Needless to say, the present invention can be applied to a copying machine or the like having a reading device or the like.
[0019]
FIG. 1 is a schematic sectional view illustrating the configuration of a laser beam printer (LBP) to which an embodiment of the present invention can be applied.
[0020]
In the figure, reference numeral 1500 denotes an LBP body (hereinafter, referred to as a printer), which inputs recording information (character codes and the like), form information, macro instructions, and the like supplied from a host computer connected directly or via a network to the outside. In addition to creating and storing corresponding character patterns and form patterns in accordance with the information, an image is formed on a recording medium such as recording paper.
[0021]
An operation panel 1501 includes switches for operation, an LED display, and the like. A printer control unit 1000 controls the entire printer 1500 and analyzes character information and the like supplied from a host computer. The printer control unit 1000 mainly converts character information into a video signal of a corresponding character pattern and outputs the video signal to the laser driver 1502.
[0022]
The laser driver 1502 is a circuit for driving the semiconductor laser 1503, and switches on / off a laser beam 1504 emitted from the semiconductor laser 1503 according to an input video signal.
[0023]
The laser beam 1504 is oscillated in the left-right direction by the rotary polygon mirror 1505 to scan and expose the electrostatic drum 1506. As a result, an electrostatic latent image of a character pattern is formed on the electrostatic drum 1506. This latent image is developed with a developer such as toner by a developing unit 1507 disposed around the electrostatic drum 1506, and is then transferred to recording paper.
[0024]
A cut sheet is used as the recording paper, and the cut sheet recording paper is stored in a paper cassette 1508 mounted on the printer 1500, and is taken into the apparatus by a paper feed roller 1509, transport rollers 1510 and transport rollers 1511, and is statically moved. It is supplied to the electric drum 1506. The printer 1500 includes a plurality of sensors (not shown). The plurality of sensors detect the size of the recording paper stored in the paper cassette 1508, detect the presence or absence of the recording paper stored in the paper cassette 1508, and detect a paper jam. Is detected, and the printer control unit 1000 is notified. In response to this notification, the printer control unit 1000 (specifically, a CPU 12 shown in FIG. 2 described later) can detect a recordable paper size.
[0025]
Further, a plurality of optional paper feed units (not shown) can be mounted on the printer 1500, so that a plurality of sizes of recording paper can be fed. The optional paper feed unit also has a sensor (not shown) that detects the size of the recording paper stored in the unit, the presence or absence of a recording paper, the presence or absence of a paper jam, and notifies the printer control unit 1000. And
[0026]
Further, the recording paper after the transfer is sent to a fixing unit 1512, where the recording paper is fixed by applying pressure and heat, and is discharged outside the apparatus by a discharge roller 1513.
[0027]
A double-sided unit 1520 is mounted on the printer 1500. The sheet printed on the front side by the double-sided unit 1520 is turned upside down and fed again to enable double-sided printing. Note that the same function as that of the duplex unit 1520 may be provided inside the printer 1500.
[0028]
Hereinafter, the duplex printing process by the duplex unit 1520 will be described.
[0029]
Once the sheet is conveyed to the discharge roller 1513 after the surface fixing, the conveyance direction of the sheet is switched by inverting the discharge roller 1513, and after being conveyed to the re-feed conveyance path 1522 via the flapper 1521, the predetermined The paper is re-fed at the timing of.
[0030]
FIG. 2 is a block diagram illustrating a configuration of a printer control system to which a printing apparatus according to an embodiment of the present invention can be applied. Here, the laser beam printer (printer) shown in FIG. 1 is described as an example, and the same components as those in FIG. 1 are denoted by the same reference numerals. If the functions of the present invention are executed, a system in which processing is performed via a network such as a LAN, whether it is a single peripheral device or a system including a plurality of peripheral devices. Needless to say, the present invention can be applied.
[0031]
In the figure, reference numeral 3000 denotes a host computer which is a CPU 1 for executing document processing in which graphics, images, characters, tables (including spreadsheets, etc.) are mixed based on a document processing program or the like stored in a program ROM of a ROM 3. The CPU 1 comprehensively controls each device connected to the system bus 4.
The program ROM of the ROM 3 stores a control program of the CPU 1, a program for recognizing recording direction designation information of a recording medium from information obtained from the host computer, and the like. The font ROM of the ROM 3 stores the above-mentioned document processing. Font data and the like to be used when the above-mentioned document processing is performed are stored in the data ROM of the ROM 3.
[0032]
Reference numeral 2 denotes a RAM, which functions as a main memory, a work area, and the like of the CPU 1, and also functions as a register for storing recording direction designation information recognized by a program in the ROM 3.
[0033]
Reference numeral 5 denotes a keyboard controller (KBC) which controls a key input from a keyboard (KB) 9 or a pointing device such as a mouse (not shown). Reference numeral 6 denotes a CRT controller (CRTC), which controls display on a CRT display (CRT) 10. Reference numeral 7 denotes a disk controller (DKC) for controlling access to an external memory 11 such as a hard disk (HD) for storing a boot program, various applications, font data, user files, edit files, and the like, and a flexible disk (FD).
[0034]
Reference numeral 8 denotes a printer controller (PRTC) which is connected to the printer 1500 via a predetermined bidirectional interface (interface) 21 and executes communication control processing with the printer 1500.
[0035]
The CPU 1 instructs a printing process by the printer 1500 by transmitting print information to the printer 1500 through the PRTC 8 and the interface 21 in accordance with a print command (one-sided print command, two-sided print command). Note that this print command includes designation of a print size (print designation size).
[0036]
The CPU 1 executes, for example, a process of developing (rasterizing) the outline font on the display information RAM set on the RAM 2 to enable WYSIWYG on the CRT 10. Further, the CPU 1 opens various registered windows based on commands specified by a mouse cursor or the like (not shown) on the CRT 10 and executes various data processing.
[0037]
In the printer 1500, reference numeral 12 denotes a CPU, which controls access to various devices connected to the system bus 15 based on a control program or the like stored in a program ROM of the ROM 13 or a control program or the like stored in an external memory 14. It controls the entire system and outputs an image signal as output information to a printing unit (printer engine) 17 connected via a printing unit interface (I / F) 16. The program ROM of the ROM 13 stores a control program of the CPU 12 and the like.
[0038]
The font ROM of the ROM 13 stores font data and the like used when generating the output information. In the case of a printer without the external memory 14 such as a hard disk in the data ROM of the ROM 13, the font data is stored on the host computer 3000. The information used is stored.
[0039]
The CPU 12 can communicate with the host computer 3000 via the input unit 18 and can notify the host computer 3000 of information in the printer 1500 and the like.
[0040]
The CPU 12 receives print information from the input unit 18 in accordance with a print command from the host computer 3000, and performs print processing on a recording medium (one side, both sides).
[0041]
Reference numeral 19 denotes a RAM that functions as a main memory, a work area, and the like for the CPU 12, and is configured so that the memory capacity can be expanded by an optional RAM connected to an unillustrated expansion port. The RAM 19 is used for an output information development area, an environment data storage area, an NVRAM, and the like. The access to the external memory 14 such as a hard disk (HD) and an IC card is controlled by a disk controller (DKC) 20.
[0042]
The external memory 14 is connected as an option, and stores font data, an emulation program, form data, and the like. Reference numeral 18 denotes the above-described operation unit (operation panel) in which switches for operation, an LED display, and the like are arranged.
[0043]
The above-mentioned external memory is not limited to one, and at least one external memory is provided. In addition to the built-in fonts, an optional font card and a plurality of external memories storing programs for interpreting printer control languages of different language systems can be connected. It may be configured. Further, an NVRAM (not shown) may be provided to store printer mode setting information from the operation panel 1501.
[0044]
Hereinafter, the first control processing procedure in the printing apparatus of the present invention will be described with reference to the flowchart of FIG.
[0045]
FIG. 3 is a flowchart showing an example of a first control processing procedure in the printing apparatus of the present invention, which is executed by the CPU 12 shown in FIG. 2 based on a program stored in the ROM 13 or another storage medium (not shown). And
[0046]
When a print command is issued from the host computer 3000, it is determined in step S1 whether or not a sheet of the document size (designated print size) included in the print command is present in the printing apparatus. If it is determined that there is no paper, the process proceeds to step S2 in order to perform a process for a case where the paper sizes do not match.
[0047]
In step S2, it is determined whether printing is forcibly performed even if the paper sizes do not match, based on whether the forced printing mode selected in advance by the user is on or off.
[0048]
If it is determined in step S2 that the forced printing mode is off and the paper sizes do not match, and it is determined that printing is not forcibly performed, the process proceeds to a forced printing disabled mode in step S9 and subsequent steps. Display a message such as "Print Check" on the display panel of the printing device, or send the same type of content to the host computer, notify the user that the desired print result cannot be obtained in the current state, and execute the processing. finish.
[0049]
On the other hand, if it is determined in step S2 that forced printing is to be performed even when the forced printing mode is on and the paper sizes do not match, the process proceeds to the forced printing mode in step S3 and subsequent steps. Is determined, and if it is determined that the printing is double-sided printing, the process proceeds to step S4, where the specified size and the width of the paper size to be actually fed (transverse direction) as shown in FIG. And the difference “B” between the length (longitudinal direction) and the difference “A” are measured and stored in the RAM 19 or the like.
[0050]
Next, in step S5, a printing operation is performed on the front side of the sheet, and in step S6, rendering processing of print data on the back side is performed to generate image data. When the directions are parallel (when the sheet is fed in the feeding direction in FIG. 5 described later), the difference “B” calculated (measured) in step S4 is added to the margin of the leading end of the sheet in the sheet conveying direction and described later. A new margin is set as shown in FIG.
[0051]
Next, in step S7, when the longitudinal direction of the sheet is perpendicular to the sheet conveying direction (feeding direction) (when the sheet is fed in the sheet conveying direction in FIG. 6 described later), the sheet in the sheet conveying direction The difference “A” calculated (measured) in step S4 is added to the margin at the leading end to set a new margin.
[0052]
Based on the back surface data thus generated, the printing operation of the back surface of the sheet is performed in step S8, and the process is terminated.
[0053]
On the other hand, if it is determined in step S3 that the print command is not in the double-sided printing mode, that is, it is single-sided printing, the process proceeds to step S11 to perform the printing operation on the front side of the sheet (similar to the conventional single-sided printing shown in FIG. 8). ), End the process.
[0054]
If it is determined in step S1 that there is paper of the designated size, it is determined in step S10 whether or not the print command is in the double-sided printing mode. If it is determined, the process proceeds to step S11 to perform a printing operation on the front side of the sheet.
[0055]
On the other hand, if it is determined in step S10 that the print command is in the double-sided printing mode, the process proceeds to step S12 to perform a printing operation on the front side of the sheet. In step S12, a printing operation on the back side of the normal sheet is performed. The process ends.
[0056]
That is, when there is a sheet of the specified size in step S1 (in the case of "Y" in step S1), normal double-sided printing processing (S12, S13) or single-sided printing processing (S11) is performed.
[0057]
In step S1, it is determined whether or not the paper of the document size included in the print command is present in the printing apparatus. However, it is determined whether the paper of the document size included in the print command can be fed, including a paper jam. May be determined.
[0058]
The setting of the forced print mode shown in step S2 is set on the host computer 3000, is included in the print command, and is transmitted to the printer 1500.
[0059]
Steps S4, S6, and S7 may be changed as follows.
[0060]
First, in step S4, the difference between the designated size and the paper size to be actually fed is measured in the feeding direction. That is, when the longitudinal direction of the paper is parallel to the transport direction (feeding direction) of the paper (the feeding direction shown in FIG. 5), the difference “B” in the longitudinal direction is measured, while the transport of the paper is performed. When the longitudinal direction of the sheet is perpendicular to the direction (feeding direction) (the sheet conveying direction shown in FIG. 6), the difference “A” in the short direction is measured. Further, when rendering the print data of the back surface and generating image data, steps S6 and S7 are integrated to calculate (measurement) in step S4 the margin of the leading end of the sheet in the sheet transport direction (feeding direction). ) May be added to set a new margin.
[0061]
FIG. 4 is a schematic diagram illustrating the correspondence between the designated print size and the paper size in the printing apparatus according to the embodiment of the present invention.
[0062]
In the figure, A is the difference between the designated print size and the width of the paper actually fed (short direction), and B is the difference between the designated print size and the length of the actually fed paper size (longitudinal direction). It is.
[0063]
FIG. 4 corresponds to front side printing when the longitudinal direction of the sheet is parallel to the sheet conveying direction (feeding direction), and the sheet is fed and printed in the direction of the arrow in the figure. .
[0064]
FIG. 5 is a schematic diagram illustrating a printing position set for data on the back side in the forced printing mode (both sides) in the printing apparatus according to the embodiment of the present invention.
[0065]
FIG. 5 corresponds to back side printing when the longitudinal direction of the paper is parallel to the paper transport direction (feeding direction), and the paper is fed and printed in the direction of the arrow in the figure. .
[0066]
As shown in the figure, when two-sided printing is performed in the forced printing mode, if paper is fed in the feeding direction indicated by an arrow in the drawing with respect to the data on the back side, the feeding direction of the paper (paper feeding direction) Is set as "B" which is the difference between the designated print size and the length (longitudinal) of the paper size to be actually fed.
[0067]
As described above, as shown in FIGS. 4 and 5, in the present embodiment, when the duplex printing is forcibly performed in a state where the actually fed paper size and the designated print size do not match each other, Even if the paper feeding direction is reversed (that is, even if the longitudinal direction of the paper is parallel to the paper transport direction (feeding direction) as shown in FIGS. 4 and 5), the printing position on the front surface The printing can be performed so that the print position of the back side matches the print position of the back side.
[0068]
FIG. 6 is a schematic diagram showing correspondence between double-sided print data and an output result in the printing apparatus according to the embodiment of the present invention, wherein the paper size specified in the double-sided print data and the paper size actually fed are different. If not, it corresponds to the result of forced double-sided printing. FIG. 6 corresponds to double-sided printing when the longitudinal direction of the sheet is perpendicular to the sheet conveying direction (feeding direction), and the sheet is fed (conveyed) in the direction of the arrow in the figure and printed. Shall be.
[0069]
As shown in the figure, when two-sided printing is performed in the forced printing mode, if paper is fed in the paper transport direction (feeding direction) in the figure with respect to the data on the back side, the leading edge of the paper feeding direction is used. "A" (FIG. 5), which is the difference between the width (short width) of the designated print size and the paper size to be actually fed, is set as the image start position.
[0070]
As shown in FIG. 6, in the present embodiment, when the duplex printing is forcibly performed in a state where the actually fed paper size does not match the designated print size, as shown in FIG. Even when the longitudinal direction of the sheet is parallel to the transport direction (feeding direction), printing can be performed so that the printing position on the front surface (the position indicated by the broken line on the back surface) matches the printing position on the back surface.
[0071]
As described above, according to the printing information according to the double-sided printing command and the state of the recording paper set in the printing device, even if the recording paper of the size designated for printing cannot be fed to the printing device (paper out or originally set). Even if the printing is not performed), the printing process can be executed efficiently without stopping the printing, and the printing result as close as possible to the printing result desired by the user can be provided.
[0072]
In the present embodiment, the processing of the flowchart shown in FIG. 3 is executed by the printing apparatus (the CPU 12 of the printer 1500). However, the CPU 1 of the host computer 3000 shown in FIG. May be configured to be executed based on a program stored in the storage medium. In this case, it is assumed that the host computer 3000 requests the printer 1500 for a paper size that can be fed by the printer 1500 and acquires the size.
[0073]
The margin at the leading end of the sheet in the transport direction corresponds to one of TOP, BOTTOM, LEFT, and RIGHT margins according to the portrait / landscape, top / bottom / left / right binding, and the sheet transport direction. Are also included in the present invention.
[0074]
Further, in the above-described embodiment, the case where the printing process is performed based on the print command transmitted from the host computer has been described, but the image reading unit has the image reading unit, and the document information read by the image reading unit and the image storage unit are stored. The present invention is also applicable to a print instruction for image information stored in the image storage unit.
[0075]
Hereinafter, the configuration of a data processing program readable by the printing apparatus according to the present invention will be described with reference to a memory map shown in FIG.
[0076]
FIG. 7 is a diagram illustrating a memory map of a storage medium that stores various data processing programs that can be read by the printing apparatus according to the present invention.
[0077]
Although not shown, information for managing a group of programs stored in the storage medium, for example, version information, a creator, and the like are also stored, and information dependent on the OS or the like on the program reading side, for example, a program is identified and displayed. Icons and the like may also be stored.
[0078]
Further, data dependent on various programs is also managed in the directory. Further, when the program or data to be installed is compressed, a program or the like for decompressing may be stored.
[0079]
The functions shown in FIG. 3 in the present embodiment may be executed by a host computer by a program installed from the outside. In this case, the present invention is applied even when a group of information including a program is supplied to the output device from a storage medium such as a CD-ROM, a flash memory, or an FD, or from an external storage medium via a network. Things.
[0080]
As described above, the storage medium storing the program codes of the software for realizing the functions of the above-described embodiments is supplied to the system or the apparatus, and the computer (or CPU or MPU) of the system or the apparatus stores the storage medium in the storage medium. It goes without saying that the object of the present invention is also achieved by reading and executing the program code thus obtained.
[0081]
In this case, the program code itself read from the storage medium implements the novel function of the present invention, and the storage medium storing the program code constitutes the present invention.
[0082]
Examples of a storage medium for supplying the program code include a flexible disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, DVD-ROM, magnetic tape, nonvolatile memory card, ROM, EEPROM, A silicon disk or the like can be used.
[0083]
When the computer executes the readout program code, not only the functions of the above-described embodiments are realized, but also an OS (Operating System) running on the computer based on the instruction of the program code. It goes without saying that a part or all of the actual processing is performed and the functions of the above-described embodiments are realized by the processing.
[0084]
Further, after the program code read from the storage medium is written into a memory provided on a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. It goes without saying that a CPU or the like provided in the board or the function expansion unit performs part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.
[0085]
Further, the present invention may be applied to a system including a plurality of devices or to an apparatus including a single device. Needless to say, the present invention can be applied to a case where the present invention is achieved by supplying a program to a system or an apparatus. In this case, by reading a storage medium storing a program represented by software for achieving the present invention into the system or the apparatus, the system or the apparatus can enjoy the effects of the present invention. .
[0086]
Further, by downloading and reading out a program represented by software for achieving the present invention from a database on a network by a communication program, the system or apparatus can enjoy the effects of the present invention. .
[0087]
【The invention's effect】
As described above, according to the first to fifth aspects of the present invention, when it is impossible to feed a recording sheet that matches the specification of the document size included in the double-sided printing instruction, the paper size is larger than the specified document size. The recording paper is fed and the front side is printed, and the difference information between the designated document size and the size of the fed recording paper is measured.Based on the measured difference information, the printing position on the back side of the recording paper is determined. Decision and printing on the back side, according to the print information received by the double-sided printing command from the host computer and the state of the recording paper set in the printing device, the recording paper of the size specified to be printed in the printing device, for example. Even when the paper cannot be fed (in the case of paper shortage or not set originally, paper jam, etc.), it is possible to efficiently execute the printing process without stopping the printing and to perform the printing desired by the user. The effect of such can provide a print result as close as possible to the fruit.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view illustrating a configuration of a laser beam printer (LBP) to which an embodiment of the present invention can be applied.
FIG. 2 is a block diagram illustrating a configuration of a printer control system to which a printing apparatus according to an embodiment of the present invention can be applied.
FIG. 3 is a flowchart illustrating an example of a first control processing procedure in the printing apparatus of the present invention.
FIG. 4 is a schematic diagram illustrating a correspondence state between a designated print size and a paper size in the printing apparatus according to the embodiment of the present invention.
FIG. 5 is a schematic diagram illustrating a printing position set for data on the back side in a forced printing mode (both sides) in the printing apparatus according to the embodiment of the present invention.
FIG. 6 is a schematic diagram illustrating correspondence between double-sided print data and an output result in a printing apparatus according to an embodiment of the present invention.
FIG. 7 is a diagram illustrating a memory map of a storage medium that stores various data processing programs that can be read by the printing apparatus according to the present invention.
FIG. 8 is a schematic diagram showing correspondence between print data and an output result in a conventional printing apparatus.
FIG. 9 is a schematic diagram showing correspondence between double-sided print data and an output result in a conventional printing apparatus.
FIG. 10 is a schematic diagram showing correspondence between double-sided print data and an output result in a conventional printing apparatus.
[Explanation of symbols]
12 CPU
13 ROM
19 RAM
1000 Printer control unit
1500 Laser beam printer (LBP)
1508 Paper cassette
1509 Paper feed roller
1510 Transport roller
1511 Transport roller
1520 Double-sided unit

Claims (5)

Paper feeding means for feeding one or more recording papers, detecting means for detecting the size of the recording paper that can be fed from the paper feeding means, and a document size included in the double-sided printing instruction based on the double-sided printing instruction A printing unit having a printing unit capable of performing double-sided printing on recording paper matching the specification,
If it is impossible to feed a recording sheet that matches the specification of the document size included in the double-sided printing command, a recording sheet larger than the specified document size is fed and the front side is printed, and the specified document size and Measuring means for measuring the difference information of the size of the fed recording paper;
Determining means for determining a printing position on the back surface of the recording paper based on the difference information measured by the measuring means;
A printing device comprising: The measuring means measures the difference information in the short direction and the difference information in the long direction between the designated original size and the size of the fed recording paper,
The determining unit determines the printing position of the leading end of the sheet in the sheet conveying direction on the back side based on the difference information in the longitudinal direction measured by the measuring unit when the sheet conveying direction and the longitudinal direction of the sheet are parallel. When the paper transport direction is perpendicular to the longitudinal direction of the paper, the printing position of the leading end of the paper in the paper transport direction on the back side is determined based on the difference information in the lateral direction measured by the measuring means. The printing apparatus according to claim 1, wherein Paper feeding means for feeding one or more recording papers, detecting means for detecting the size of the recording paper that can be fed from the paper feeding means, and a document size included in the double-sided printing instruction based on the double-sided printing instruction A printing unit having a printing unit capable of performing double-sided printing on recording paper matching the specification,
If it is impossible to feed a recording sheet that matches the specification of the document size included in the double-sided printing command, a recording sheet larger than the specified document size is fed and the front side is printed, and the specified document size and A measuring step of measuring the difference information of the size of the fed recording paper;
A determining step of determining a printing position on the back surface of the recording paper based on the measured difference information;
A method for controlling a printing apparatus, comprising: A program for executing the control method for a printing apparatus according to claim 3. A storage medium storing a computer readable program for executing the control method for a printing apparatus according to claim 3.

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