JP5257217B2 - Printing system, printing apparatus and information processing apparatus - Google Patents

Description

  The present invention relates to a printing system in which an information processing apparatus and a printing apparatus are communicably connected. More specifically, the present invention relates to a printing system in which a printing apparatus executes printing according to print data transmitted from the information processing apparatus, and a printing apparatus and an information processing apparatus that constitute the printing system.

  Conventionally, in a printing system in which an information processing apparatus and a printing apparatus are communicably connected, when an error occurs during printing, the printing apparatus transmits print data to the information processing apparatus in order to recover the error. Some require retransmission. For example, in Patent Document 1, when a print error has occurred and the corresponding print data has already been deleted, the information processing apparatus is requested to request print data necessary for printing again, and the print data is re-executed. The technology to acquire is disclosed.

JP 07-256990 A

  However, the conventional printing system described above has the following problems. For example, in automatic double-sided printing, printing for two pages, the front and back sides, is performed, but if a print failure occurs on a page that is printed later, printing is completed for the page that was printed first. Therefore, data may be erased. Therefore, in order to perform appropriate recovery, return to the previously printed page, request retransmission of the print data, and specify the page required for the recovery operation on both the printing device and the information processing device. Is required. Therefore, processing becomes complicated.

  The present invention has been made to solve the above-described problems of the prior art. That is, the problem is to provide a printing system that can recover double-sided printing with simple processing, and a printing apparatus and an information processing apparatus that constitute the printing system.

  In order to solve this problem, a printing system is configured such that an information processing apparatus and a printing apparatus capable of duplex printing in which n sheets are printed on one side and then n sheets are printed on one side are communicably connected. A printing system in which printing is executed by a printing device in accordance with print data transmitted from a processing device, and the information processing device divides a print job composed of a plurality of pages in units of 2n pages, and is print data in divided units. The dividing means for creating the divided data, and the subsequent division data is transmitted in response to the reception of the subsequent data request from the printing device, and the immediately preceding division in response to the reception of the data retransmission request from the printing device. And a transmission unit for transmitting data. The printing apparatus determines whether or not the printing of the divided data is normally completed, and after determining that the determination unit normally completes, the printing apparatus performs information processing. Processing apparatus notifies the subsequent data request, when the determination means determines not to complete successfully is characterized in that it comprises a notifying means for notifying a data retransmission request to the information processing apparatus.

  The information processing apparatus constituting the printing system of the present invention creates divided data obtained by dividing a print job consisting of a plurality of pages in units of 2n pages, and transmits the print job to the printing apparatus in units of divided data. Note that n is a natural number of 1 or more. In the printing device, when double-sided printing of divided data is normally completed, a subsequent data request for requesting transmission of subsequent divided data is notified, and if not completed normally, a data retransmission request for requesting transmission of the same divided data as before is performed. To be notified. The information processing apparatus transmits subsequent divided data in response to receiving the subsequent data request. In the printing apparatus, double-sided printing and subsequent data request notification are repeated, and printing is sequentially performed up to the divided data including the final page, thereby completing the printing of the entire original print data. On the other hand, the information processing apparatus transmits the same divided data as the previous time in response to receiving the data retransmission request. The printing device receives the same divided data as the previous time and prints again. Thereby, recovery is achieved.

  That is, in the printing system of the present invention, a print job of divided data divided in units of 2n pages is created, and the print jobs are exchanged in units of 2n pages. If the printing is not normally completed during double-sided printing, the same divided data is requested to be transmitted again, and the divided data is printed again. That is, recovery can be realized by retransmitting the divided data that has not been printed normally, and it is not necessary to specify pages on both the information processing apparatus and the printing apparatus. This simplifies processing.

  Further, the printing apparatus may delete the printed print data from the memory in a cycle of less than 2n pages. By erasing data that is unnecessary after printing at an early stage, the memory of the printing device can be used efficiently. The timing of erasing may be less than 2n pages. For example, when creating divided data in units of two pages, the print data of that page is erased every time printing of one page is completed. Since data is erased at an early stage, it is particularly effective when the memory capacity of the printing apparatus is small or when the free memory capacity is small.

  The information processing apparatus includes an adding unit that adds identification information indicating that the divided data belong to the same print job to the divided data transmitted to the printing apparatus, and the printing apparatus is specified by the identification information. It is preferable to provide a restricting means for restricting printing of print data belonging to another print job between divided data belonging to the same print job. By attaching identification information, it is possible to distinguish divided data belonging to other print jobs. By restricting the interruption of the print data of another print job during the printing of the divided data belonging to the same print job, the divided data of the same print job can be preferentially processed. As a result, a printed output can be obtained for each divisional print job.

  In addition, the printing apparatus may cancel printing of the divided data belonging to the print job to be canceled when printing cancellation is instructed. As a result, accumulation of unprocessed print data can be avoided. Further, it is possible to save the user from erasing unprocessed print data.

  The information processing apparatus may delete the immediately preceding divided data when a subsequent data request is received from the printing apparatus. That is, it is possible to efficiently use the memory of the information processing apparatus by erasing data that has been printed and no longer needs to be stored at an early stage.

  Further, the dividing unit of the information processing apparatus may create divided data from the print job when the print job is duplex printing. With single-sided printing, recovery is possible even if data is exchanged in units of one page, and there is little need to divide a print job into units of multiple pages. Therefore, it is possible to reduce the complexity of processing by creating divided data in units of multiple pages only in the case of duplex printing.

  Further, the dividing unit of the information processing apparatus may create divided data from the print job when the memory of the printing apparatus is not sufficient. If the memory of the printing device is sufficient, there is a high possibility that all print jobs for all pages can be stored. If all print jobs are stored, recovery is possible without re-sending the print job. Therefore, it is possible to reduce the complexity of the process by creating the divided data only when the memory of the printing apparatus is insufficient. Whether or not the memory is sufficient can be determined by comparing the free space of the memory, the size of the print job, or both.

  The present invention is also an information processing apparatus that is communicably connected to a printing apparatus capable of duplex printing that prints n sheets on one side and then prints n sheets on the other side, and transmits print data to the printing apparatus. , A dividing unit that divides a print job consisting of a plurality of pages in units of 2n pages and generates divided data that is print data in divided units, and subsequent divided data in response to receiving a subsequent data request from the printing apparatus And an information processing apparatus including transmission means for transmitting the immediately preceding divided data in response to receiving a data retransmission request from the printing apparatus.

  Further, the present invention is capable of duplex printing in which n sheets are printed on one side and then n sheets on the other side are printed, and is communicably connected to the information processing apparatus, and according to print data transmitted from the information processing apparatus. A printing apparatus that executes printing, and the information processing apparatus divides a print job consisting of a plurality of pages in units of 2n pages, and determines whether or not printing of divided data that is print data in division units is normally completed After determining that the means and the determining means are normally completed, the information processing apparatus is notified of the subsequent data request for requesting transmission of the subsequent divided data, and when the determining means determines that the data is not normally completed, And a notifying unit for notifying the processing device of a data retransmission request for requesting retransmission of the divided data.

  According to the present invention, a printing system that can recover double-sided printing with a simple process, and a printing apparatus and an information processing apparatus that constitute the printing system are realized.

1 is a block diagram illustrating a configuration of a printing system according to an embodiment, and a configuration of a PC and a printer that configure the printing system. It is a figure which shows the concept of the division job transmission process of the printing system which concerns on embodiment. 4 is a flowchart illustrating a procedure of print data transmission processing of the PC according to the embodiment. It is a flowchart which shows the procedure of the division job transmission process of PC which concerns on embodiment. 4 is a flowchart illustrating a printing process procedure of the printer according to the embodiment. 6 is a flowchart illustrating a procedure of print job cancel processing of the printer according to the embodiment.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment embodying a printing system according to the present invention will be described in detail with reference to the accompanying drawings. In this embodiment, the present invention is applied to a printing system in which a printer having a double-sided printing function and a personal computer (PC) that is a transmission source of print data are connected via a network.

[Configuration of printing system]
As shown in FIG. 1, a printing system 300 according to this embodiment includes a PC 100 (an example of an information processing apparatus) that transmits print data, and a printer 200 that receives the print data and prints an image of the print data (of the printing apparatus). Example). In the printing system 300, the PC 100 and the printer 200 are connected to the network 30. Note that the number of PCs and printers constituting the printing system 300 is not limited to one, and a plurality of PCs and printers may be connected. Further, other information processing apparatuses and printing apparatuses may be connected to the network 30.

[PC configuration]
As shown in FIG. 1, the PC 100 includes a CPU 11 that executes various arithmetic processes, a ROM 12 that stores a startup process program (BIOS) executed by the CPU 11 when the PC 100 is started, and the CPU 11 performs various processes. It has a RAM 13 that is used as a temporary storage area, and a hard disk drive (HDD) 14 that stores various programs and data.

  The PC 100 includes an operation unit 15 including a keyboard and a mouse, a display unit 16 including a liquid crystal display, and a network interface 18 for exchanging signals via the network 30.

  Further, the HDD 14 of the PC 100 includes an operating system (OS), an application capable of editing image data (for example, document creation software, drawing software, spreadsheet software, photo data editing software, etc.), and a printer corresponding to the printer 200. The driver is stored.

[Printer configuration]
As shown in FIG. 1, the printer 200 includes a CPU 21 that executes arithmetic processing for realizing various functions, a ROM 22 that stores various control programs for controlling hardware, various settings, initial values, and the like. , RAM 23 used as a work area for reading various control programs or a storage area for temporarily storing print data, and a non-volatile storage means for storing various settings or print data NVRAM (Non Volatile RAM) 24 used as

  The printer 200 includes an operation unit 25 including a touch panel and various buttons, a display unit 26 including a liquid crystal display, and a network interface 28 for exchanging signals via the network 30.

  The printer 200 also has an image forming unit 27 having a printing function. The image forming unit 27 prints an image on a sheet based on print data sent from an information processing apparatus such as the PC 100. The image forming method may be an electrophotographic method or an ink jet method. Further, it may correspond to a color image or may be dedicated to a monochrome image.

  The image forming unit 27 has a double-sided printing function. Therefore, a paper conveyance path for reversing the paper is provided in the printer 200. Specifically, when performing double-sided printing, the image forming unit 27 prints an image on one side, then reverses the paper and prints an image on the other side. Then, after images are printed on both sides of the paper, the paper is discharged and the next paper is started to be carried. That is, duplex printing is performed for each sheet.

[Print function]
Next, a printing function in the printing system 300 will be described. In a mode in which n sheets are continuously printed on one side, such as duplex printing, and then the other side is printed, 2 n pages of print data are left in the memory in order to cope with recovery at the time of a printing error. The operation to read it again is necessary. For this reason, in a mode in which print data is deleted immediately after printing is completed, it is necessary to request retransmission of the print data that has been deleted.

  Therefore, in the printing system 300, when double-sided printing is instructed by the PC 100, as shown in FIG. 2, the print data 50 instructed to print is divided into print data 501 to 50n for every two pages and divided. A print job is created for each print data 501 to 50n. In the following description, the divided print data is referred to as “divided data”, and the print job for printing the divided data is referred to as “divided job”. The print data 50 exemplified in the present embodiment is composed of two or more pages. If the total number of pages is x (x is a natural number of 2 or more), x / 2 if x is an even number, If x is an odd number, x / 2 + 1 divided jobs are created.

  Job identification information 51 is attached to each divided job. The job identification information 51 is information for identifying the divisional print job (that is, the print data 50), and the job identification information 51 having the same contents is attached to the divided jobs divided from the same print job.

  After creating the divided job, the PC 100 transmits the divided job including the first page to the printer 200. The printer 200 starts double-sided printing of the received divided job, and requests the PC 100 to transmit the subsequent divided job when printing is completed. The PC 100 transmits a subsequent page division job in response to a request from the printer 200. This operation is repeated until the divided job including the last page.

  When a printing failure occurs during double-sided printing by a divided job, the printer 200 requests the PC 100 to retransmit the divided job in which the printing failure has occurred. In response to the retransmission request, the PC 100 retransmits the same divided job as the previous time. Thereby, recovery is achieved.

  Hereinafter, a print data transmission process on the PC 100 side and a print process on the printer 200 side that realize the printing function in the printing system 300 will be described.

[PC print data transmission processing]
First, print data transmission processing (an example of a dividing unit, a transmission unit, and an adding unit) of the PC 100 that realizes a printing function will be described with reference to the flowchart of FIG. This process is executed when a print instruction is issued via an application or the like installed in the PC 100.

  First, it is determined whether or not the content of the print instruction is double-sided printing (S101). If it is not double-sided printing (S101: NO), a print job for all pages is transmitted to the printer 200 without creating a divided job (S121), and this process ends.

  On the other hand, if it is double-sided printing (S101: YES), the printer 200 is inquired and acquired the available memory capacity of the printer 200 (S102). Further, the size of the print data is calculated and acquired (S103).

  Next, it is determined whether or not the divided transmission of the print job is necessary (S104). That is, the free capacity of the printer 200 and the size of the print data are compared, and it is determined whether or not the printer 200 can secure a free area of a memory equal to or greater than a predetermined value. (For example, even if print jobs for all pages are stored in the memory, it is determined whether or not the memory has sufficient free space). The necessity for divided transmission can be determined by comparing the available capacity of the printer 200 with the size of the print data, as well as whether the available capacity of the memory exceeds a threshold value, whether the size of the print job exceeds the threshold value, and the like.

  If it is determined that the divided transmission is not necessary, that is, if it is determined that a sufficient memory area is secured in the printer 200 (S104: NO), even if the print data for all the pages is exchanged, It is assumed that there will be no significant load. Therefore, a print job for all pages is transmitted to the printer 200 without creating a divided job (S121).

  On the other hand, when it is determined that the divided transmission is necessary, that is, when it is determined that a sufficient memory area is not secured in the printer 200 (S104: YES), the divided data print job obtained by dividing the print data every two pages. The divided jobs are sequentially transmitted from the first page to the printer 200 (S105).

  Here, the details of the divided job transmission process of S105 will be described with reference to the flowchart of FIG. In the divided job transmission process, first, job identification information for identifying a print job as a division source is generated (S111).

  Next, the print data is divided into two pages, and the print data for the first two pages is acquired from the page data (S112). Then, job identification information is added to the print data for the first two pages (S113), and a divided job corresponding to the first two pages is generated (S114). Then, the generated divided job is transmitted to the printer 200 (S115).

  After the divided job is transmitted, a data retransmission request signal requesting retransmission of the divided job or a subsequent data request signal requesting transmission of the subsequent divided job is received from the printer 200 (S116, S117).

  When the data retransmission request signal is received (S116: YES), the process returns to S115, and the same divided job as the previously transmitted divided job is retransmitted. On the other hand, when the subsequent data request signal is received (S117: YES), first, the print data of the previously transmitted divided job is deleted (S118). Then, it is determined whether there is any remaining divided data, that is, whether there is an unsent divided job (S119). If there is a remainder of the divided data (S119: YES), the divided data for the next two pages is acquired (S120), and the process returns to S113 to repeat the transmission of the divided job. If there is no remaining divided data (S119: NO), this process is terminated.

  Note that the processing from S102 to S104 may be set as an option. That is, the processing from S102 to S104 is not always necessary. If there is no processing from S102 to S104, if it is double-sided printing (S101: YES), the divided job transmission processing of S105 is performed. If it is not double-sided printing processing (S101: NO), the print job transmission processing of S121. I do.

[Printer processing]
Next, a printing process (an example of a determination process, a notification process, and a restriction unit) of the printer 200 that realizes the printing function will be described with reference to a flowchart of FIG. This process is executed when a print job transmitted from the PC 100 or the like is received. 5 is a print process corresponding to the divided job based on S105 (print process executed when the divided job is received), and the print process corresponding to the print job based on S121 is illustrated. The previous print processing, that is, the operation of calling the print data stored in the memory and printing is repeated, and the processing not requesting the retransmission of the print data is executed.

  First, print data is acquired from the received print job (S201). Further, the job identification information of the print job added to the print data is acquired (S202). Thereafter, the printing process based on the print data acquired in S201 is started (S203). In the printing process, the print data of the page is deleted for each page every time printing is completed.

  Next, it is determined whether or not the print job has been canceled (S204). In the printer 200, the user detects the cancellation of the print job by operating the operation unit 25 of the printer 200. When printing is canceled (S204: YES), the process proceeds to print job cancellation processing (S221). Details of the print job cancel process in S221 will be described later.

  If printing has not been canceled (S204: NO), it is determined whether printing has been normally completed (S205). If printing has not been completed normally (S205: NO), a data retransmission request signal requesting retransmission of the current print job is notified to the print job transmission source (PC 100 in this embodiment) (S231). That is, if the current print job is a divided job, it requests retransmission of the same divided job. An example of a case where printing is not normally completed is a conveyance failure due to a paper jam, for example. After the notification of the data retransmission request signal, the same print job is received again and the print data is acquired (S232). In step S203, the print data is printed again.

  When printing is normally completed (S205: YES), a subsequent data request signal for requesting transmission of the subsequent divided job is notified to the transmission source of the print job (PC 100 in this embodiment) (S206).

  Thereafter, a print job (divided job) sent from the PC 100 is accepted until a predetermined period elapses (S207). If a subsequent print job is not accepted even after the predetermined period has elapsed (S207: NO), this process ends. That is, if the succeeding divided job is not sent even though the subsequent data request signal is sent, it is assumed that all the divided jobs have been sent, and the printing process is terminated.

  When a print job is received (S207: YES), it is determined whether job identification information is added to the received print job (S208). That is, job identification information is not added to a normal print job that is not divided. Therefore, it can be determined whether the job is a divided job based on the presence or absence of job identification information.

  If it has job identification information (S208: YES), it is determined whether the job identification information matches the job identification number of the previously printed divided job (S209). If the job identification numbers match (S209: YES), it can be determined that the print job of the division source is common and is a division job subsequent to the previous division job. Therefore, the process returns to S203 to print the received print job.

  On the other hand, if the job identification information is not included (S208: NO), or if the job identification numbers do not match (S209: NO), it can be determined that the print job is not related to the previous divided job. That is, it can be considered that the print job has been interrupted. Therefore, the print job accepted in S207 is set in a standby state (S210). Thereafter, the process returns to S207, and the next print job sent from the PC 100 is accepted until a predetermined period elapses.

  Next, details of the print job cancel process in S221 will be described with reference to the flowchart of FIG. In the print job cancel process, first, the current print job to be printed is deleted (S241).

  Next, the subsequent data request signal is notified to the transmission source of the print job (in this embodiment, the PC 100) (S242). Thereafter, a print job (divided job) sent from the PC 100 is accepted until a predetermined period elapses (S243). When a print job is received (S243: YES), it is determined whether job identification information is added to the received print job (S244). If the job identification information is included (S244: YES), it is determined whether or not the job identification information matches the job identification number of the divided job to be canceled (S245). If the job identification numbers match (S245: YES), it can be determined that the print job of the division source is the same, and that the divided job that received the cancel instruction and the series of divided jobs. Therefore, the process returns to S241 to delete the accepted print job. The reception and deletion of the remaining divided jobs are repeated until all the divided jobs are received.

  On the other hand, if the print job is not accepted even after the predetermined period has elapsed (S243: NO), the print job deleted earlier is regarded as the divided job of the last page, and the print job waiting in S251 (standby) Move to (Job) deletion processing. If the job identification information is not included (S244: NO) or the job identification numbers do not match (S245: NO), the print job is not related to the print job for which the cancel instruction has been accepted. Similarly, the process proceeds to the waiting job deletion process of S251.

  In the waiting job deletion process after S251, the divided jobs having the same dividing source as the print job that received the cancel instruction are deleted from the waiting jobs. Therefore, it is first determined whether there is a waiting job (S251). If there is no waiting job (S251: NO), this process is terminated.

  If there is a waiting job (S251: YES), it is determined whether job identification information is added to the waiting job (S252). If the job identification information is included (S252: YES), it is determined whether the job identification information matches the job identification number of the divided job that has started printing (S253). If the job identification numbers match (S253: YES), it can be determined that the print job of the division source is common and that the print job that received the cancel instruction and the series of divided jobs. Therefore, the standby job is deleted (S254). Then, the process returns to S251, and the determination for the remaining standby job is repeated.

  On the other hand, if the job identification information is not included (S252: NO), or the job identification numbers do not match (S253: NO), the remaining standby jobs are not related to the print job for which the cancel instruction has been accepted. Since a split job with the same identification number is processed preferentially, it can be assumed that there is no standby job with the same identification number as the print job that accepted the cancel instruction in the remaining standby jobs. . Therefore, this process ends.

  As described above in detail, in the printing system 300 of this embodiment, the PC 100 divides the print data into units of two pages, and sequentially transmits the divided data in accordance with the subsequent data request signal. The printer 200 executes double-sided printing of the received divided data. In the printer 200, if the printing is not normally completed during the double-sided printing, the same divided data is received again, and the divided data is printed again to realize the recovery. That is, in the printing system 300, recovery can be realized by exchanging divided data, and it is not necessary to specify pages on both the PC 100 and the printer 200. This simplifies the recovery process.

  In addition, the printer 200 acquires the job identification number assigned to the print job, and puts the print jobs with different division sources in a standby state. That is, priority is given to the printing of the divided data derived from the same print job, and the interruption to other print jobs is restricted. As a result, printed output can be obtained for each job, and the convenience of the user can be expected to be improved.

  In the print job cancel process, a subsequent data request signal for requesting transmission of divided data is continuously sent even after it is determined that the cancel has occurred. Then, the received divided data is erased without printing on the printer 200 side. As a result, the PC 100 does not require special processing corresponding to cancellation on the printer 200 side. Therefore, the cancellation process is simplified.

  In addition, print data for all pages is sent during normal printing or when the memory has enough free space, and print data for all pages is sent again when printing is not completed normally. By storing the page where the printer 200 has a printing failure, reprinting of the same page can be avoided. Even in this case, page management in the PC 100 is unnecessary, and it is not necessary to specify a page in both the PC 100 and the printer 200.

  Note that this embodiment is merely an example, and does not limit the present invention. Therefore, the present invention can naturally be improved and modified in various ways without departing from the gist thereof. For example, the printing apparatus is not limited to a printer, and may be a copier or a multifunction machine. Further, the information processing apparatus is not limited to a PC, and may be a workstation, a portable information terminal apparatus, or the like.

  In the printing system 300 according to the present embodiment, the print job is divided in units of two pages. This is because the printer 200 performs double-sided printing one sheet at a time. It depends on the aspect. For example, double-sided printing is performed on two sheets of paper by carrying two sheets of paper and printing in the order of the first back side, the second back side, the first front side, and the second front side. If there is, the print job is divided in units of four pages. In other words, it may be divided in units of 2n pages in accordance with the conveyance mode of the printer 200 that performs duplex printing on each of n sheets of paper (n is a natural number of 1 or more).

  In the printing system 300 according to the present embodiment, double-sided printing is performed and printing is performed using divided data when the memory capacity of the printer 200 is small. However, the present invention is not limited to this. For example, even in normal printing, divided data divided in units of 2n pages may be created. Further, even when the memory capacity of the printer 200 is sufficiently secured for the print data, the divided data divided in units of 2n pages may be created.

50 Split source print data 50a to 50x Split data 51 Job identification information 100 PC
200 Printer 300 Printing System 30 Network

Claims (7)

An information processing apparatus and a printing apparatus capable of duplex printing that prints n sheets on one side and then prints n sheets on the other side are connected to be communicable, and the printing apparatus according to print data transmitted from the information processing apparatus In a printing system where printing is performed at
The information processing apparatus includes:
A dividing unit that divides the print job in units of 2n pages when creating a double-sided print job consisting of a plurality of pages, and generates divided data that is print data in divided units;
Transmitting means for transmitting subsequent divided data in response to receiving a subsequent data request from the printing apparatus, and transmitting immediately preceding divided data in response to receiving a data retransmission request from the printing apparatus; ,
An assigning unit for giving identification information indicating that the divided data belong to the same print job to the divided data transmitted to the printing apparatus;
With
The printing device includes:
A judging means for judging whether or not the printing of the divided data is normally completed;
A notification for notifying the information processing apparatus of a subsequent data request after the determination means determines that it is normally completed, and a notification for notifying the information processing apparatus of a data retransmission request when the determination means determines that it is not normally completed. Means,
When another print job is received between the divided data belonging to the same print job specified by the identification information, the print of the other print job is set to a standby state and belongs to the same print job. Limiting means for limiting interruption by the other print job during processing of divided data;
A printing system comprising: The printing system according to claim 1,
The printing system is characterized in that the printing apparatus erases the printed print data from the memory in a cycle of less than 2n pages. In the printing system according to claim 1 or 2 ,
The printing system according to claim 1, wherein when printing stop is instructed, the printing apparatus stops printing of divided data belonging to a print job to be printed. In the printing system according to any one of claims 1 to 3 ,
The printing system according to claim 1, wherein the information processing apparatus deletes the immediately preceding divided data when a subsequent data request is received from the printing apparatus. In the printing system according to any one of claims 1 to 4 ,
The printing system according to claim 1, wherein the dividing unit generates divided data from the print job when the print job is received and the memory of the printing apparatus is insufficient. In an information processing apparatus that is communicably connected to a printing apparatus capable of duplex printing that prints n sheets on one side and then prints n sheets on the other side, and transmits print data to the printing apparatus.
A dividing unit that divides the print job in units of 2n pages when creating a double-sided print job consisting of a plurality of pages, and generates divided data that is print data in divided units;
Transmitting means for transmitting subsequent divided data in response to receiving a subsequent data request from the printing apparatus, and transmitting immediately preceding divided data in response to receiving a data retransmission request from the printing apparatus; ,
An assigning unit for giving identification information indicating that the divided data belong to the same print job to the divided data transmitted to the printing apparatus;
An information processing apparatus comprising: A printing apparatus capable of performing duplex printing in which n sheets are printed on one side and then n sheets on the other side are printed, and is communicably connected to the information processing apparatus and executes printing in accordance with print data transmitted from the information processing apparatus In
Determining means for determining whether or not printing of divided data, which is print data in division units, in which the information processing apparatus divides a double-sided print job composed of a plurality of pages in units of 2n pages;
After determining that the determination means is normally completed, the information processing apparatus is notified of a subsequent data request for requesting transmission of subsequent divided data, and when the determination means determines that the data is not normally completed, A notification means for notifying the information processing apparatus of a data retransmission request for requesting retransmission of divided data;
When another print job is received between the divided data belonging to the same print job, which is added to the divided data and specified by the identification information indicating that the divided data belongs to the same print job, the other Limiting means for setting a print job of a print job to a standby state and limiting interruption by the other print job during processing of divided data belonging to the same print job;
A printing apparatus comprising:

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