JP2000289304A - Print processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make each page arrangement same as a specified one during printing in use of a printing function in a reverse order of a multi-page by determining page numbers with a code added to the head of a printing data of each page, and writing the printing data of page numbers when the corresponding paper buffer is empty. SOLUTION: CPU 11 runs to determine page numbers of the whole of a printing document by a code added to the head of a printing data, and hence each page arrangement is determined through the calculation of the entire page number, page buffer number, and the page numbers of written printing data. The CPU 11 also works to compile printing data via an I/O port 14 in accordance with the control program of ROM 12 to then be written in the page buffer of RAM 13. A page buffer for storing a printing data for one page in accordance with a sheet of printing paper conducts printing by a printing mechanism 15 in accordance with the printing data with a page eject command from a host computer or a non-space capacity of the page buffer. This can accomplish each page arrangement expectedly even in reverse order printing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing method.

[0002]

2. Description of the Related Art Conventionally, printers, particularly page printers, have been provided with a multi-page printing function for printing the print contents of a plurality of pages on a single print sheet. Among the multi-page printing functions, for example,
In a two-page printing function for printing two pages of printing content on one sheet of printing paper, when print data is sent from a host computer, the control unit reduces the size of a character to half its size, and Is arranged on the left and right sides of the printing paper.

[0003] By the way, there are two types of page printer discharge methods: a face-up type discharge method that discharges print paper with the print surface facing upward, and a face-down discharge method that discharges print paper with the print surface facing down. There is a paper method. In the case of a page printer adopting the face-up type discharge method, when printing a plurality of pages, the print paper discharged from the discharge stacker is piled up on the already discharged print paper. Even so, there is provided a printer provided with a reverse printing function so that the upper printing paper has a younger page. When the reverse printing function is used, printing is performed sequentially from the last page.

[0004]

However, in the conventional two-page printing function, when printing is performed using the reverse order printing function, the arrangement of each page may be different from the expected one.

FIG. 2 is a first diagram showing an arrangement of each page when printing is performed using only a conventional two-page printing function.
FIG. 3 is a first diagram showing an arrangement of each page when printing is performed using a conventional two-page printing function and a reverse printing function.
FIG. 4 is a second diagram showing an arrangement of each page when printing is performed using only the conventional two-page printing function, and FIG. 5 is printed using the conventional two-page printing function and the reverse printing function. FIG. 10 is a second diagram showing the arrangement of each page in the case.

Usually, when printing a plurality of pages,
The host computer (not shown) sends print data to the page printer in order from the first page. When printing a plurality of pages using only the two-page printing function, the page printer writes the print data into the left page buffer when the print data of the first page is sent, When the print data of the next page is sent, it is written to the right page buffer. That is, page N is stored in the page buffer for the left side.
(N = 1, 2,...) And the print data of page N + 1 are written in the page buffer for the right side. Therefore, each page can be arranged as shown in FIG.

When printing a plurality of pages using the two-page printing function and the reverse printing function, the host computer sends print data to the page printer sequentially from the last page. Therefore, the print data of page N + 1 is written in the page buffer for the left side, and the print data of page N is written in the page buffer for the right side.
Each page is arranged as shown in FIG. 3, and the left and right pages are reversed.

[0008] Particularly, when printing is performed for an odd number of pages, for example, three pages using only the two-page printing function, as shown in FIG. , Page 2 is arranged on the right side, page 3 is arranged on the left side of the second print sheet, and the right side is blank.

On the other hand, when printing three pages using the two-page printing function and the reverse-order printing function,
As shown in FIG. 5, page 1 is arranged on the left side of the first printing sheet, the right side becomes a margin, page 3 is on the left side of the second printing sheet, and page 2 is on the right side. Are arranged. That is, not only are the left and right pages reversed, but a margin is formed on the first page of the printing paper.

As described above, when printing a plurality of pages using the two-page printing function and the reverse printing function, the arrangement of each page is different from the expected one.

The present invention solves the problems of the conventional print processing method, and when printing a plurality of pages using the multi-page printing function and the reverse printing function, the arrangement of each page is determined. It is an object of the present invention to provide a print processing method which can be the same as that of the first embodiment.

[0012]

For this purpose, in a print processing method according to the present invention, a page number is determined based on a code added to the head of print data of each page, and a page corresponding to the page number is determined. It is determined whether or not the buffer is empty. If the page buffer is empty, the print data of the page number is written.

In another print processing method according to the present invention, the total number of pages of a document to be printed is determined based on a code added to the head of print data, and the total number of pages and the number of pages in a page buffer are determined. The calculation is performed based on the number and the page number of the print data to be written into each page buffer, and the arrangement of each page is determined based on the calculation result.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram of a control section of a page printer according to the first embodiment of the present invention.

In the figure, 11 is a CPU, 12 is a ROM in which a control program is written, 13 is a RAM in which temporary data is stored, and 14 is a device which receives print data from a host computer which is a higher-level device, and prints a print mechanism. Part 15
An I / O port for controlling a motor (not shown), reading a sensor output, transferring print data to a print head (not shown), and the like.

Next, the operation of the page printer when printing is performed using the multi-page printing function will be described.

FIG. 6 is a first diagram showing a multi-page printing function according to the first embodiment of the present invention, and FIG. 7 is a second diagram showing a multi-page printing function according to the first embodiment of the present invention. It is.

First, the CPU 11 (FIG. 1)
And receives print data from the host computer via the I / O port 14 according to the control program. Then, the CPU 11 edits the print data by an editing means (not shown) and converts the print data edited by a developing means (not shown) into an RA.
Expand to M13.

At this time, when normal printing is performed without using the multi-page printing function, the CPU 11 expands the edited print data in the RAM 13 and stores the edited print data in a page buffer (not shown) set in the RAM 13. Write. The page buffer is a memory area set to store one page of print data corresponding to one print sheet. If the printing direction on the printing paper is portrait (portrait), C
The PU 11 writes the print data from the portion corresponding to the left front end of the printing paper in the page buffer along the short side of the printing paper. If the printing direction on the printing paper is landscape (landscape direction), the CPU 11
Rotates the developed print data by 90 [°], and writes the print data along the long side of the print paper from a portion corresponding to the right front end of the print paper in the page buffer.

When a page break command is received from the host computer or when the free space in the page buffer is exhausted, printing is performed by the printing mechanism unit 15 in accordance with the print data in the page buffer, and then the page buffer is cleared. Write the print data of the next page.

Next, when printing is performed using, for example, a two-page printing function of the multi-page printing function, the page buffer is a first page buffer Ba0 for the left side and a second page buffer Ba1 for the right side. Is divided into

If the printing direction on the printing paper is landscape, the CPU 11 reduces the print data developed in the predetermined area AR1 in the RAM 13 to 1 / √ (2) in the vertical and horizontal directions, and reduces the size. The written print data is sequentially written from the portion corresponding to the left front end in the page buffer along the short side of the printing paper.

When the printing direction on the printing paper is portrait, the CPU 11 rotates the print data developed in a predetermined area AR1 in the RAM 13 by 90 ° as shown in FIG. The print data D1 is reduced in the vertical and horizontal directions by 1 / √ (2) to obtain print data D2. The print data D2 is output from a portion of the page buffer Ba corresponding to the right front edge of the print paper. Write in order along the long side. In this case, first, print data is written to the first page buffer Ba0, and when a page break command is received from the host computer or when the free space of the first page buffer Ba0 is exhausted, the second page buffer Ba1 is written. The print data is written in. As described above, the print data of each page is alternately written to the first and second page buffers Ba0 and Ba1.

Then, the second page buffer Ba1
When the page break command is received from the host computer while the print data is being written in the second page buffer Ba1, or when the free space in the second page buffer Ba1 is exhausted, the printing mechanism unit is operated in accordance with the print data in the second page buffer Ba1. 15 and then the page buffer B
a is cleared, and the print data for the next page is written to the page buffer Ba.

When printing is performed using, for example, a four-page printing function among the multi-page printing functions, FIG.
, The page buffer Bb is divided into first to fourth page buffers Bb0 to Bb3. If the printing direction on the printing paper is portrait, the CPU 11 reduces the printing data developed in the predetermined area AR2 in the RAM 13 by half in the vertical and horizontal directions to obtain printing data D3. The print data D3 is sequentially written from a portion of the first page buffer Bb0 corresponding to the left front end of the print sheet along the short side of the print sheet.

In this case, first, when print data is written into the first page buffer Bb0 and a page break command is received from the host computer, or when the free space of the first page buffer Bb0 is exhausted, the second When print data is written to the page buffer Bb1 and a page break command is received from the host computer, or when the free space of the second page buffer Bb1 is exhausted,
When print data is written to the third page buffer Bb2 and a page break command is received from the host computer, or when the third page buffer Bb2 runs out of free space, the print data is written to the fourth page buffer Bb3. .

Then, the fourth page buffer Bb3
When the page break command is received from the host computer while the print data is written in the fourth page buffer Bb, or the free space of the fourth page buffer Bb3 is exhausted, the printing is performed by the print mechanism unit 15 according to the print data in the page buffer Bb. After that, the page buffer Bb is cleared, and the print data for the next page is stored in the page buffer B.
Write to b.

Next, the operation of the page printer when printing is performed using the two-page printing function and the reverse printing function will be described.

FIG. 8 is a flowchart showing the operation of the page printer according to the first embodiment of the present invention.

In this case, when sending the print data of each page to the page printer, the host computer adds a code indicating the page number of the page to be printed to the head of the print data. Then, a page number determination unit (not shown) in the CPU 11 (FIG. 1) extracts the code from the transmitted print data, and determines the page number based on the code.

Here, the page number represented by the code is NP, and the first and second page buffers Ba0, Ba
The page number of the print data written in a1 is PB
L and PBR. When the page number NP is 0, there is no print data to be written in the page buffer Ba. When the page numbers PBL and PBR are 0, the print data is stored in the first and second page buffers Ba0 and Ba1. Is not written, that is, the first and second page buffers Ba0 and Ba1 are empty.

First, the CPU 11 sets the page number PBL,
PBR is set to 0, and the page number determining means determines whether the page number NP of the print data to be written to the page buffer Ba is an odd number. If the page number NP is an odd number, a page not shown First page buffer B by buffer determination means
It is determined whether or not a0 is empty. When the first page buffer Ba0 is empty, the CPU 11
Prints the print data of the page number NP into the first page buffer Ba0 by the print data writing unit (not shown), and sets the value NP to the page number PBL by the page arrangement determination unit (not shown). If the first page buffer Ba0 is not empty, printing is performed according to the print data stored in the page buffer Ba,
Thereafter, the page buffer Ba is cleared, and the page numbers PBL and PBR are set to 0.

On the other hand, when the page number NP is an even number,
The CPU 11 determines whether or not the second page buffer Ba1 is free by the page buffer determining means. When the second page buffer Ba1 is empty, the CPU 11 writes the print data of the page number NP in the second page buffer Ba1 by the print data writing unit, and stores the value in the page number PBR by the page arrangement determination unit. Set NP. If the second page buffer Ba1 is empty and the first page buffer Ba0 is not empty, the first page buffer Ba
It is determined whether the page number PBL of the print data stored in 0 is larger than the current page number NP.

The page number PBL of the print data stored in the first page buffer Ba0 is the current page number N
If it is larger than P, printing is performed according to the print data stored in the page buffer Ba, and then the page buffer Ba is cleared and the page numbers PBL, P
Set BR to 0. Also, the first page buffer B
If the page number PBL of the print data stored in a0 is smaller than the current page number NP, the CPU 11
Writes the print data of the page number NP into the second page buffer Ba1 by the print data writing means,
The value NP is set to the page number PBR by the page arrangement determining means.

Then, the first and second page buffers Ba
When 0 and Ba1 are not empty, the CPU 11 performs printing according to the print data stored in the page buffer Ba, and then clears the page buffer Ba and sets 0 to the page numbers PBL and PBR.

As described above, in the present embodiment, it is determined whether or not the page number NP is an odd number. If the page number NP is an odd number, the first page buffer Ba0 is determined.
Is determined to be empty, and if the first page buffer Ba0 is empty, the first page buffer Ba0
Is written with the print data of the page number NP. If the page number NP is an even number, the second page buffer B
It is determined whether or not a1 is empty, and if the second page buffer Ba1 is empty, the second page buffer B
The print data of the page number NP is written to a1. Therefore, even if the reverse printing is performed, not only the left and right pages are not reversed, but also no margin is formed on the first page of the printing paper. As a result, the arrangement of each page can be made the same as the expected one.

In this embodiment, when the page number NP is an odd number, the first page buffer Ba0
The print data of the page number NP is written in each of the pages, and the pages are arranged in the order of left and right. However, the pages can be arranged in the order of right and left by exchanging the page numbers PBL and PBR. .

Next, the flowchart will be described. Step S1 0 is set to the page numbers PBL and PBR. Step S2: It is determined whether or not the page number NP is an odd number. If the page number NP is an odd number, the process proceeds to step S3; otherwise, the process proceeds to step S6. Step S3: It is determined whether or not the page number PBL is 0. If the page number PBL is 0, the process proceeds to step S5; otherwise, the process proceeds to step S4. Step S4: Printing is performed, the page buffer Ba is cleared, and the page numbers PBL and PBR are set to 0. Step S5: Write the print data into the first page buffer Ba0, and set the value NP to the page number PBL. Step S6: It is determined whether the page number PBR is 0. If the page number PBR is 0, the process proceeds to step S7; otherwise, the process proceeds to step S9. Step S7: It is determined whether the page number PBL is 0. If the page number PBL is 0, the process proceeds to step S10; otherwise, the process proceeds to step S8. Step S8: It is determined whether the page number PBL is larger than the value NP. If the page number PBL is larger than the value NP, the process proceeds to step S9. If the page number PBL is smaller than the value NP, the process proceeds to step S10. In step S9, printing is performed, the page buffer Ba is cleared, and the page numbers PBL and PBR are set to 0. Step S10: Write the print data into the second page buffer Ba1, and set the value NP to the page number PBR. Step S11: It is determined whether the page numbers PBL and PBR are not equal to 0. Page number PB
If both L and PBR are not equal to 0, step S
In the case where one of the page numbers PBL and PBR is 0 in step 12, the process proceeds to step S13. In step S12, printing is performed to clear the page buffer Ba and set page numbers PBL and PBR to 0. Step S13: The value of the page number NP is decremented by one. Step S14: It is determined whether the page number NP is 0. If the page number NP is 0, step S
Proceed to step 15; if not 0, return to step S2. Step S15: Printing is performed in accordance with the print data stored in the page buffer Ba at that time, the page buffer Ba is cleared, and the page numbers PBL, P
BR is set to 0, and the process proceeds to the next step.

Next, the second embodiment of the present invention having an N-page printing function for printing N pages of print content on one sheet of printing paper.
An embodiment will be described. In addition, about what has the same structure as 1st Embodiment, the description is abbreviate | omitted by attaching the same code | symbol.

FIG. 9 is a flowchart showing the operation of the page printer according to the second embodiment of the present invention, FIG. 10 is a conceptual diagram of a page buffer according to the second embodiment of the present invention, and FIG. FIG. 1 is a diagram for explaining an allocation state of page buffers at the time of normal printing according to the second embodiment.
FIG. 2 is a diagram for explaining a page buffer allocation state at the time of reverse printing according to the second embodiment of the present invention.

In this case, printing is performed by the control program written in the ROM 12 (FIG. 1). Before sending the print data to the page printer, the host computer adds a code indicating the total number of pages of the document to be printed and a code indicating whether the print is in the normal order or in the reverse order to the head of the print data. . Then, the not-shown total page number determining means of the CPU 11 extracts the code from the transmitted print data, determines the total number of pages of the document to be printed based on the code,
It is determined whether or not normal printing is performed.

Here, the total number of pages of the document represented by the code is TP. When printing is performed using the N-page printing function, the page buffer Bc is divided into N pages, and the page buffers BcX (X = 0, 1,..., N
-1) is formed. Then, the page number of the print data to be written to the page buffer Bc is set to np
And The page number np is the page buffer Bc
Is incremented each time the print data of each page is written to the page, and changes from 1 to TP.

First, the CPU 11 operates in a normal order (not shown).
The reverse-order determining means determines whether to perform normal-order printing according to the code sent from the host computer. When performing normal-order printing, the calculating means (not shown) uses the variable XX = based on the following first arithmetic expression. Calculate np mod N. The variable X is a surplus value obtained by dividing the value np by the value N, and mod is a function for calculating the surplus. When the variable X as the operation result is 0, the CPU 1
1 sets a value N-1 to the variable X by a page arrangement determining means (not shown), and subtracts 1 from the variable X when the variable X is not 0. Then, the CPU 11 writes the print data into the (X + 1) th page buffer BcX corresponding to the variable X by a print data writing unit (not shown).

Subsequently, the CPU 11 determines whether or not all the print data has been written to the page buffer Bc, and if all the print data has been written to the page buffer Bc, the CPU 11 determines the printing mechanism according to the print data in the page buffer Bc. Printing is performed by the unit 15, and then the page buffer Bc is cleared.

For example, in a page printer having a four-page print function for printing four pages of print content on one print sheet, when the total number of pages of a document to be printed by normal printing is four. , The value N is 4, so when the value np is 1, the variable X becomes X = 1 mod 4 = 1, and when the variable X is subtracted from 1, the variable X becomes 0. Therefore, the CPU 11 writes the print data in the first page buffer Bc0. Also, when the value np is 2, the variable X is 2, so that 1 is subtracted from the variable X to be 1. Therefore, the CPU 11 writes the print data to the second page buffer Bc1. Then, when the value np is 3, the variable X is 3, and thus 1 is subtracted from the variable X to be 2. Therefore, the CPU 11 writes the print data in the third page buffer Bc2. further,
Since the variable X is 0 when the value np is 4, the variable X
Is set to 3. Therefore, the CPU 11 writes the print data in the fourth page buffer Bc3.

In a page printer having a four-page printing function, if the total number of pages of a document to be printed by normal printing is 6, the value N is 4, and the value np is 1. At this time, since the variable X is 1, subtracting 1 from the variable X results in 0. Therefore, CPU
11 writes the print data in the first page buffer Bc0. Also, when the value np is 2, the variable X is 2, so that 1 is subtracted from the variable X to be 1. Therefore, the CPU 11 writes the print data to the second page buffer Bc1. Then, when the value np is 3, the variable X is 3, and thus 1 is subtracted from the variable X to be 2. Therefore, the CPU 11 writes the print data in the third page buffer Bc2. Further, when the value np is 4, the variable X is 0, so 3 is set to the variable X. Therefore, the CPU 11 writes the print data in the fourth page buffer Bc3. And the value np is 5
Since the variable X is 1, when 1 is subtracted from the variable X, it becomes 0. Therefore, the CPU 11 writes the print data in the first page buffer Bc0. Also,
When the value np is 6, the variable X is 2, so the variable X
Subtracting 1 from 1 gives 1. Therefore, the CPU 11
Writes the print data in the second page buffer Bc1.

On the other hand, when the reverse printing is performed, the CPU 1
1 is a variable XX = N-[{np + N- (TP mod N)} mod based on the following second calculation expression by the calculation means.
N] is calculated.

Subsequently, the CPU 11 determines whether or not the variable X as an operation result is N by the page arrangement determining means. If the variable X is not N, the CPU 11 sets the variable X to the variable X by the print data writing means. Write the print data to the corresponding (X + 1) th page buffer BcX. When the variable X is N, the CPU 11 sets the variable X to 0 by the page arrangement determining means, and stores the print data in the first page buffer Bc0 corresponding to the variable X by the print data writing means. Write.

Therefore, for example, in a page printer having a four-page printing function for printing four pages of print content on one sheet of paper, the total number of pages of a document to be printed by reverse printing is four. In this case, since both the value N and the value TP are 4, when the value np is 1, the variable X becomes X = 4-[{1 + 4- (4 mod 4)} mod 4] = 3. Then, the CPU 11 writes the print data in the fourth page buffer Bc3. When the value np is 2, the variable X becomes 2, and the CPU 11 writes the print data in the third page buffer Bc2. When the value np is 3, the variable X becomes 1, and the CPU 11
Writes the print data in the second page buffer Bc1. Further, when the value np is 4, the variable X becomes 4, and 0 is set to the variable X. Therefore, CPU1
1 writes print data in the first page buffer Bc0.

As described above, the calculation is performed based on the total number of pages TP of the document to be printed, the number of the (X + 1) th page buffer BcX, and the page number np of the print data to be written in each of the (X + 1) th page buffers BcX. This is performed, and the arrangement of each page is determined based on the calculation result. Therefore, no margin is formed on the first page of the printing paper even when the reverse printing is performed. As a result, the arrangement of each page can be made the same as the expected one. For example, when performing reverse printing on a page printer having a four-page printing function, each page is printed as shown in FIG.
Since the pages are arranged in the order of upper left, upper right, lower left, and lower right, the arrangement of each page can be the same as the intended one.

In this embodiment, each page is arranged in the order of upper left, upper right, lower left, and lower right. However, by changing the order of the (X + 1) th page buffer BcX, each page is changed. Pages can be arranged in an appropriate order. For example, the (X + 1) th page buffer BcX
Can be arranged in the order of lower right, lower left, upper right and upper left.

Next, the flowchart will be described. Step S21: It is determined whether or not to perform normal printing.
If normal printing is to be performed, the process proceeds to step S22; otherwise, the process proceeds to step S26. Step S22 X = variable X by np mod N
Is calculated. Step S23: Determine whether the variable X is 0. If the variable X is 0, the process proceeds to step S25; otherwise, the process proceeds to step S24. Step S24: The value of the variable X is decremented by one. Step S25: Set a value N-1 to the variable X. Step S26 X = N − [｛np + N− (TP mo
d N) {mod N] to calculate a variable X. Step S27: It is determined whether or not the variable X is a value N. If the variable X is the value N, the process proceeds to step S28.
If not, the process proceeds to step S29. Step S28: Set 0 to the variable X. Step S29: Write print data to the (X + 1) th page buffer BcX. Step S30: to judge whether all the print data has been written to the page buffer Bc. If all the print data has been written to the page buffer Bc, the process proceeds to step S31; otherwise, the process proceeds to step S3.
Proceed to 2. Step S31: to print, clear the page buffer Bc, and return. Step S32: It is determined whether or not the value np is equal to the value TP. If the value np is equal to the value TP, step S
The process proceeds to step S33, and if not equal, returns to step S21. Step S33: Perform printing in accordance with the print data in the page buffer Bc, and clear the page buffer Bc.

The present invention is not limited to the above embodiment, but can be variously modified based on the gist of the present invention, and they are not excluded from the scope of the present invention.

[0055]

As described above in detail, according to the present invention, in the print processing method, the page number is determined based on the code added to the head of the print data of each page, and the page number is determined. Is determined, and if the page buffer is free, print data of the page number is written.

In this case, if the page buffer corresponding to the page number is empty, the print data of the page number is written, so that even if reverse printing is performed, the left and right pages may be reversed. Not only is eliminated, but no margin is formed on the first page of the printing paper. As a result, the arrangement of each page can be made the same as the expected one.

In another print processing method of the present invention, the total number of pages of a document to be printed is determined based on a code added to the head of print data, and the total number of pages and the number of pages in the page buffer are determined. The calculation is performed based on the number and the page number of the print data to be written into each page buffer, and the arrangement of each page is determined based on the calculation result.

In this case, calculation is performed based on the total number of pages of the document to be printed, the number of page buffers, and the page number of the print data to be written into each page buffer, and based on the calculation result, each page is calculated. Is determined, no margin is formed on the first page of the printing paper even when the reverse printing is performed. As a result, the arrangement of each page can be made the same as the expected one.

[Brief description of the drawings]

FIG. 1 is a block diagram of a control unit of a page printer according to a first embodiment of the present invention.

FIG. 2 is a first diagram illustrating an arrangement of each page when printing is performed using only a conventional two-page printing function.

FIG. 3 is a first diagram showing an arrangement of each page when printing is performed using a conventional two-page printing function and a reverse printing function.

FIG. 4 is a second diagram showing the arrangement of each page when printing is performed using only the conventional two-page printing function.

FIG. 5 is a second diagram showing the arrangement of each page when printing is performed using the conventional two-page printing function and the reverse printing function.

FIG. 6 is a first diagram illustrating a multi-page printing function according to the first embodiment of the present invention.

FIG. 7 is a second diagram illustrating a multi-page printing function according to the first embodiment of the present invention.

FIG. 8 is a flowchart illustrating an operation of the page printer according to the first embodiment of the present invention.

FIG. 9 is a flowchart illustrating an operation of the page printer according to the second embodiment of the present invention.

FIG. 10 is a conceptual diagram of a page buffer according to the second embodiment of the present invention.

FIG. 11 is a diagram illustrating an allocation state of a page buffer at the time of normal printing according to the second embodiment of the present invention.

FIG. 12 is a diagram illustrating a page buffer allocation state during reverse printing according to the second embodiment of the present invention.

[Explanation of symbols]

 Ba-Bc Page buffer NP, np, PBL, PBR Page number TP Number of pages

Claims (2)

[Claims] (A) determining a page number based on a code added to the head of print data of each page; (b) determining whether a page buffer corresponding to the page number is free; (C) A print processing method, wherein print data of the page number is written when the page buffer is empty. (A) determining the total number of pages of the document to be printed based on a code added to the head of the print data; and (b) determining the total number of pages, the number of page buffers, and A print processing method comprising: performing an operation based on the page number of print data to be written into each page buffer; and (c) determining the arrangement of each page based on the operation result.