JP2015502274A - Multiple print head thermal printer - Google Patents

Abstract

A printing system comprising a printer having two print heads, a sensor for detecting the position of a roll-shaped receiver medium in the printer, and a roller for starting a multi-page print job with one print head based on the position of the roller-shaped receiver medium in the printer provide. The second page of the print job is printed before the first page of the print job according to the position of the roller receiver medium in the printer.

Description

  The present invention relates to thermal printing, and more particularly to control of a contact amount between a feed roller and a thermal medium in a printer.

  As is well known, a die diffusion thermal transfer printer has an aggressively textured drive roller and a companion pinch roller that applies a load between the paper and drive rollers to control the paper in a controllable manner and prevent image misalignment between color passes. Widely used. In this type of drive system, since the aggressively textured drive roller does not contact the printing surface of the paper, image artifacts do not occur on the paper during one side or simplex printing. On the other hand, this method has a problem because the aggressively textured drive roller always comes into contact with both sides of the printing paper during duplex printing or duplex printing. That is, when duplex printing or duplex printing is performed, the paper surface is soiled by the aggressive texture surface through contact with the aggressive texture surface of the drive roller. Since the die is not properly transferred to such a fouling surface, a visible density difference is generated between a region in contact with the aggressive texture surface of the drive roller and a region not in contact with the drive roller.

  As is also well known, the die diffusion thermal transfer printer firmware incorporates a compensation algorithm that corrects between-page or in-page density changes. However, the compensation algorithm in the printer hardware or firmware is limited and cannot completely compensate for image artifacts caused by the drive roller. Because of these limitations, it is important to reduce the chance of new contact between the aggressively textured drive roller and the paper surface.

  FIG. 2 and FIG. 3 show an example method of double-sided or duplex die diffusion thermal transfer printing. In this method, two thermal print heads 117 and 137 are used as shown in FIG. Reference numeral 110 denotes roll printing paper, which is sent between a platen roller 123 and a first thermal print head (hereinafter “TPH1”) 117 by a drive roller (feed roller) 113 and a pinch roller 112. After printing on one side 100, the printing paper is repositioned by reversing the feed roller 113 as shown in FIG. The repositioned printing paper is fed between the platen roller 131 and the second thermal print head (hereinafter “TPH2”) 137 by the drive roller 113 and the pinch roller 141, and printing is performed on the surface 101 which has not been printed yet. Applied. Sensors 124 and 130 detect the paper position in the printer. The printing paper on which both sides 100 and 101 have been printed is discharged out of the printer along the paper feed path 121 or 133. Usually, after being guided by the outlet guide 125, it is cut by the cutter 126 and discharged into the paper catch tray 128 by the action of the roller 127.

  In FIG. 4, since the printing paper is fed between the drive roller 113 and the pinch roller 141 for a certain length and the paper surface 100 is in contact with the aggressive texture surface of the drive roller, the paper surface 100 may be soiled by subsequent printing. Indicates no situation. In the conventional printing method according to the above-described printing procedure, in the next double-sided printing job, printing is again performed on the paper surface 100 by the thermal print head TPH1 (see FIG. 7), and the repositioned paper is the other thermal print. The operations shown in FIGS. 2 to 4 are repeated, such as being sent to the head TPH2 and printing is performed on the non-printing surface 101 of the paper. That is, in this printing order, the paper repositioning between TPH1 (117) and the paper surface 100 is executed again after the paper repositioning between the TPH2 (137) and the paper surface 101 is unnecessary. Therefore, even on the way of pulling back, the paper surface is soiled by contacting the aggressive texture surface of the drive roller.

  With respect to photobook printing, conventionally, there is known a method of printing a photobook by generating page content and sending image data to a printer. In this method, as shown in FIG. 8, the host computer 10 transmits a host request to the connection destination printer 50 and receives a printer response to the host request. For this communication, communication between the host computer and the connected printer, for example, USB connection, wired Ethernet (registered trademark) connection, wireless connection, etc. is generally used. FIG. 9 shows a general example of the page printing order in the print job by the communication between the host computer and the printer. In this example, the printing order is 10th page 951, 9th page 950, 8th page 941, 7th page 940, 6th page 931, 5th page 930, 4th page 921, 3rd page 920, 2nd. The page 911 and the first page 910 are in this order. The reason why the page printing order in the printer is in descending order is to make the last one of the pages ejected into the paper catch tray 128 the first page of the photo book. As another example of the print order of pages within the print job, on the contrary, the first page, the second page, the third page, the fourth page, the fifth page, the sixth page, the seventh page, the eighth page, There is also the order of the ninth page and the tenth page. In this form, the photobook faces downward in the paper catch tray (becomes face down), but the page order itself is aligned.

  In the above-described method illustrated with reference to FIGS. 2 to 4, the printing paper is fed between the drive roller 113 and the pinch roller 141 for a certain length, and the paper surface 100 comes into contact with the aggressive texture surface of the drive roller. The paper surface 100 may be soiled by printing.

  In the preferred printing method described in detail in the present application, in printing the next double-sided print, printing is first performed on the paper surface 101 with TPH2 as shown in FIG. That is, the same thermal print head and paper as the last used thermal print head and paper are used for printing the previous print. After printing on the paper surface 101 (hereinafter “surface B”), as shown in FIG. 6, the printer repositions the printing paper in the same manner as described above, and sends the printing paper to another thermal print head or TPH1. Then, printing is performed on the non-printing surface 100 (hereinafter “surface A”) of the printing paper. In general, the present method uses the same thermal print head and paper as the last used thermal print head and paper for printing the previous print.

  According to this printing method, since the number of steps for repositioning the paper is one less, the contact between the printing paper and the aggressive texture surface of the feed roller is reduced, and the degree of contamination of the printing paper is reduced. In addition, according to the present method, the step of repositioning the paper is reduced by one so that the throughput of the printer is improved.

  A printing system according to a preferred embodiment of the present invention includes a printer having two printheads, a sensor for detecting the position of a rolled receiver medium in the printer, and any printhead based on the position of the receiver medium in the printer. And a roller for starting execution of the next multi-page print job. The first printed page is the first or second page of the print job, depending on the position of the roll receiver medium in the printer. For example, when data indicating that the receiver medium is close to the print head dedicated to even page printing of a multi-page print job is supplied from the sensor, the execution of the multi-page print job is started from the second page. When the print job is a duplex print job, several pages and odd pages are paired, and even pages forming a pair are printed in succession, while odd pages forming a pair are printed in succession. Even pages of a duplex print job are printed exclusively by one print head, and odd pages are printed exclusively by the other print head.

  A printing system according to another embodiment of the present invention has recently been used with a sensor that detects which print head of two print heads included in a printer is used to print the last page of a previous print job. And a roller and a receiver medium for starting the next print job using the print head. If the next print job is a simplex print job, the most recently used printhead is used for printing throughout the simplex print job. In the case of a duplex print job, the printer alternately performs an operation of printing an even-numbered page pair and an operation of printing an odd-numbered page pair. In any case, the pages output from the printer and stacked are arranged in the order according to the page order.

  Another embodiment of the present invention provides a printer having two print heads, a roller for selectively positioning a receiver medium relative to one of the print heads, transmitting receiver medium position data and printing image data. Receiving a communication channel. The image data includes, for example, the second page data in the duplex print job for printing the second page of the duplex print job and the second page of the duplex print job prior to printing the first page of the duplex print job. And the first page data in the duplex print job received after the second page data for printing the first page of the duplex print job after printing. Different print heads are used to print these two pages. The in-printer sensor detects in which of the two print heads the receiver medium is located, and the print head recently used for printing is used for printing with the second page data. This is because a particular print head corresponds to even pages of a duplex print job and is dedicated to printing those even pages. Even-numbered pages of a duplex print job are paired, and printing is executed for each pair. The same applies to odd pages.

  Other objects and embodiments of the invention, including others, will be better appreciated and understood with reference to the accompanying drawings and detailed description. However, as will be appreciated, the following description is for the purpose of illustrating a preferred embodiment of the invention and its details, ie, for purposes of illustration and is not meant to be limiting. For example, it does not indicate that the components of the embodiments outlined so far cannot be exchanged. In fact, many of the elements described with respect to a particular embodiment can be used or interchanged with elements of other embodiments. The present invention includes various changes and modifications made without departing from the technical scope of the present invention. The attached drawings do not provide a precise scale with respect to the relative size, angular relationship or relative position in the actual configuration, nor do they show a combinatorial relationship for commutability, substitution or substitution in the actual configuration.

It is a figure which shows a computer operating thermal printing system. It is a figure which shows the document in a thermal printer apparatus. It is a figure which shows the document in a thermal printer apparatus. It is a figure which shows the document in a thermal printer apparatus. It is a figure which shows the document in a thermal printer apparatus. It is a figure which shows the document in a thermal printer apparatus. It is a figure which shows the document in a thermal printer apparatus. It is a figure which shows communication between a host printer. It is a figure which shows the page order at the time of outputting from a double-sided printer. It is a figure which shows the host-printer communication method. It is a flowchart which shows operation | movement embodiment of this invention. It is a flowchart which shows other operation | movement embodiment of this invention.

  Hereinafter, various embodiments will be described in detail with reference to the accompanying drawings so that the present invention can be better understood.

  FIG. 1 shows an example of a printing system suitable for implementing the present invention. In the printing system of this example, input devices such as a keyboard 46 and a mouse 44 are communicably connected to the desktop interface device 28 of the host computer 10 as usual. The interface group in the figure can be a wired connection such as a USB connection or a wireless connection such as Wi-Fi or cellular. “Host computer” to “host PC” include all data processing devices such as servers, desktop computers, PCs, laptop computers, mainframe computers, routers, personal digital assistants (PDAs), Blackberry (registered trademark), and the like. The Any device that calculates, classifies, processes, transmits, receives, reproduces, switches, stores, displays, measures, detects, records, or reproduces information or data in various forms may be used without any purpose. It may be composed of any kind of element such as electrical, magnetic, optical, biological, etc. Any connection or communication medium can be used as the means for “communication connection”. It may be wired, wireless, or a combination thereof. It suffices to be able to handle connection between devices, between computers, between programs, and data exchange between them.

  The output from the host computer 10 can be displayed on the screen of the video display 52, for example. A display interface device 24 is used for communicable connection of the video display 52 to the computer 10. The computer 10 includes a CPU 14 and a computer readable memory such as a read only memory (ROM) 16, a random access memory (RAM) 22, and a hard disk drive (HDD) 20. The latter, that is, the computer readable memory, stores part or all of image data, page data, print document, character data, program, and the like. “Computer-readable memory” includes floppy disk, hard disk, compact disk, DVD (registered trademark; not shown below), flash memory (for example, USB compliant), ROM, RAM, and other data storage devices accessible from a computer. General is included. It does not matter whether it is volatile or nonvolatile, electronic, magnetic or optical. The CPU 14 executes software stored on the hard disk drive 20 or the like while communicating with other devices via the data bus 12. In addition to a fixed medium such as the hard disk drive 20, the host computer 10 also includes a computer readable memory drive that can write data such as page print image data in a removable computer readable memory and read the data therefrom. For example, there are a CD-R / W drive 30 that can read and write various CD media 42 and a DVD drive 32 that can read and write various DVD media 40. A printer 50, for example, a die diffusion thermal transfer printer, is communicably connected to a printer interface device 26 so that it can communicate with a CPU (processor) 14 via the data bus 12. The connection between the thermal printer 50 and the printer interface device 26 functions as a bidirectional communication channel between the printer and the host computer. For example, the printer 50 can perform printing on a roll-shaped receiver medium that is loaded, and can hold a plurality of sheets of receiver medium that have been printed by a paper catch tray (exit tray) 128. It is a configuration. The printer 50 formats the document to be printed based on, for example, print information stored in a built-in buffer memory, for example, Postscript (registered trademark) data. In order to suitably implement the present invention, the printer 50 has sufficient memory to store print data for a plurality of pages in the print job, operates the printing order of pages in the print job, A processor capable of controlling the components and communications should be provided. Additional information can be stored for each type and size of media, for example, information regarding media finishing. It is desirable to provide a plurality of printing options for the printer so that, for example, duplex printing and simplex printing can be selectively executed. For example, a configuration in which any option is selected by a user input to the computer system via the mouse 44 or the keyboard 46 in the figure and confirmed by a simple graphical user interface on the video display 52 is preferable. A digital scanner 6 or other image pickup device (for example, a digitizing tablet or camera) is communicably connected to the computer 10 via, for example, the USB interface device 34, and an image obtained by the device is connected to a hard disk drive or a storage device inside or outside the computer. It may be configured to transfer. Then, the computer 10 is communicably connected to the external network 60 via the network connection device 18, and the digital object and the media asset on another computer, apparatus, or data storage system that are communicably connected to the network can be accessed. May be.

  Many printed documents and media assets include a hard disk drive 20, a CD medium 42, a DVD medium 40, a data storage device (for example, a hard disk drive on a network accessible via the network 60), and other local storage devices (for example, a thumb drive). ) And the like. Many digital objects and documents can be distributed in such a storage or storage group or a part thereof. A number of digital objects and documents may be formed in a database so that individual digital objects (eg, print jobs) and their storage locations can be uniquely identified. As can be appreciated, the digital object may be a media object or a non-media object. The medium object is, for example, a digital image captured by the scanner 6, graphics, text, or a file generated by animation software.

  In creating a double-sided (duplex) photobook, the use of the preferred printing method outlined above can greatly reduce the occurrence of image artifacts during photobook creation on a die diffusion thermal transfer printer, In addition, throughput can be improved. However, in order to execute the printing method, it is necessary to correct the page printing order so that a photo book composed of printed sheets discharged from the printer to the exit tray becomes a photo book having the same page order. is there.

  What can be supported by the above-described normal print job printing procedure is a conventional technique in which printing is always performed on the surface A on the TPH1 and then printing on the surface B on the TPH2 for each individual print job. When this method is used in connection with an embodiment of the present invention and a printing method using two print heads, that is, the next double-sided print is printed with the same print head and paper as used last in the previous print job. When using this method, the page order of the photo book becomes incorrect. In order to print properly, the 10th page 951 with TPH1 on the first print sheet, the 9th page 950 with TPH2, the 7th page 940 with TPH2 on the next print sheet, and the 8th with TPH1. Page 941, TPH1 on the next print sheet on the sixth page 931, TPH2 on the fifth page 930, TPH2 on the next print sheet on the third page 920, TPH1 on the fourth page 921, and the next print sheet It is necessary to print the second page 911 on TPH1 and the first page 910 on TPH2 in this order. In this way, the sheet stacking order in the outlet tray is the same as that in FIG. In this page order, the last printed sheet becomes the first page of the photo book in the paper catch tray of the discharge destination, so the pages in the finished printed product are arranged in the correct order from the top (in face-up order). Will be lined up). In the case of this order, the upper page, that is, the odd page of the printed matter is all printed with TPH2.

  The print order when executing a print job is as follows: TPH1 is first page, TPH2 is second page, TPH2 is fourth page, TPH1 is third page, TPH1 is fifth page, TPH2 is sixth page, TPH2 is first page Printing order of 8 pages, 7th page for TPH1, 9th page for TPH1, 10th page for TPH2 can also be used. In this page order, the pages in the photo book are arranged in the correct order (face-down order) from the bottom in the paper catch tray. In this order, all odd pages are printed with TPH1.

  In the case of a print job that performs printing according to the examples described so far and creates an odd-numbered double-sided printed matter, the printing order becomes more complicated. This is because in order to perform printing according to the method according to the preferred embodiment of the present invention, the printing order of the next print job must be changed. For example, when the pages are arranged in the face-up order as shown in FIG. 9, the last surface to be printed is the surface B, and the first page 910 is printed with TPH2. Therefore, in order to continuously apply the same method to the next print job, the page to be printed next (the first page of the next print job) must still be printed on the surface B using TPH2. That is, the surface to be printed first and the head used for the printing are different from those in the previous print job (surface A and TPH1). When the next photo book is printed in the face-up order, the page printing order in the job is the following order. That is, page 9 for TPH2, page 10 for TPH1, page 8 for TPH1, page 7 for TPH2, page 5 for TPH2, page 6 for TPH1, page 4 for TPH1, page 3 for TPH2, The first page is TPH2 and the second page is TPH1. As described above, the printing order in each print job differs depending on the surface and head used last in the preceding print job.

  Similarly, if the next print job in the print queue is a single-sided (simplex) print job, all simplex prints were used on the last page of the previous print job to reduce printer-derived roller artifacts and increase throughput. Print with the same thermal print head and paper. Accordingly, the printing order to be used in the next duplex print job depends on the last used face and head. Further complications can occur when using this printing technique to reduce printer-derived drive roller artifacts. In addition, when a problem relating to the medium state, such as jamming, occurs during printing, the logic regarding the page order becomes inappropriate. In such a case, it is necessary to remove the medium (paper) in which the problem has occurred and re-execute the print job.

  When printing according to this method while maintaining the correct page order in the photo book, the method of starting individual duplex printing using the same side as the last used in the previous printing is as follows. There is a method of determining which side to use when starting the next printing (printing on side A with TPH1 or printing on side B with TPH2). The host PC then generates and transmits image data in the appropriate order, depending on which side is to be printed first. With this method, it is possible to cope with complications due to reasons such as an odd number of print jobs, simplex printing, jamming, and other printer errors.

  FIG. 10 shows a form of communication between the host computer and the printer in the printing system shown in FIG. First, the host computer 10 receives data from an input source using internal components as described above. For example, the image data is received from the input source according to the USB 2.0 communication protocol, and the data is stored (step 171). The strike computer then executes internal data processing (step 172). In this process, the software refers to the received image data and executes a required task such as color correction based on the image data. Image data that has undergone internal data processing of the image is sent to the printer processing stage, and the processed image data is sent from the host computer to the printer (step 173). This transmission can be executed in accordance with various means such as the USB 2.0 communication protocol. The image data is sent from the host computer to the printer in a predetermined page order and stored in, for example, an image buffer on the printer side. When the image buffer is emptied, further image data from the host computer is accepted there. If the USB 2.0 communication protocol is used, communication between the host and the printer can be executed constantly.

  FIG. 11 is a flowchart showing a printing procedure according to an embodiment of the present invention. This procedure is executed by inquiring from the host PC to the printer that the printer responds to the host PC. In step 200, the data processing for the printer originating from the host similar to step 173 in FIG. 10 is executed. In step 201, image data relating to the last two pages of the remaining print job is extracted from the internal data processing result on the host side. In step 202, the host computer inquires the printer about the position of the printing paper in the printer. In step 203, the inquiry / communication is transmitted from the host computer to the printer. In step 204, the printer responds to the host computer with the printing paper position. In step 205, it is determined whether to use the thermal print head 1 (TPH1) or the thermal print head 2 (TPH2). When the printer returns a response that the printing paper position is on the TPH1 side when viewed from the outputs of the sensors 124, 130 or both, that is, the printing paper is physically close to TPH1 (straight along the path) When the printing paper is sent to TPH1, the surface A of the paper is set as the printing target surface as in step 206. In step 207, corresponding image data is transmitted from the host computer to the printer. In step 208, for example, the first image data of the image data constituting the two-page print job is referred to in order. In step 209, the paper position in the printer is switched to the position on the TPH2 side. In step 211, for example, the second image data of the image data constituting the two-page print job is referred to in order, and printing is performed on the surface B of the sheet.

  When a response is returned from the printer that the print paper position is on the TPH2 side when viewed from the outputs of the sensors 124, 130 or both, as shown in step 212, the surface B of the paper surface is set as the print target surface. In step 213, corresponding image data is transmitted from the host computer to the printer. In step 214, the image data, that is, the second image data of the image data constituting the two-page print job is referred to in order. In step 215, the paper position in the printer is switched to the position on the TPH1 side. In step 216, surface A of the paper surface is set as a surface to be printed by TPH1. In step 217, the corresponding image data, that is, the first image data of the image data constituting the two-page print job is referred to. In step 218, a determination is made as to whether additional image data should be printed. If the determination result is yes, the operation of this algorithm returns to step 201, and image data for two more pages or the last page is extracted. If no, the print job is terminated.

  When printing according to this method while maintaining the correct page order in the photo book, the method of starting individual duplex printing using the same side as the last used in the previous printing is also possible. Another method is to tell the printer from the host computer which page to print each time. For example, the printing or image data is associated with one of the surface A and the surface B. Next, the printer determines which image data is to be used next, depending on which side should be printed (whether to print on side A with TPH1 or on side B with TPH2).

  FIG. 12 shows another method. In step 301, data processing for the printer originating from the host similar to step 173 in FIG. 10 is executed. In step 302, the reception order of the image data is transmitted from the host computer to the printer. That is, it tells which image data should be printed on which side of the paper. In step 303, image data relating to the paper surface A is transmitted from the host computer to the printer. In step 304, the image data relating to the paper surface B is transmitted from the host computer to the printer. Note that step 303 and step 304 may be executed in the reverse order. In step 305, the printer uses the sensors 124, 130 or both to detect and identify the paper position within the printer. In step 306, based on the position where the paper exists in the printer, it is determined whether to use TPH1 or TPH2. When the printer determines that the paper position is on the TPH1 side, as shown in step 307, the paper surface A is the printing target surface. In step 308, the printer refers to the image data relating to surface A. In step 309, for example, printing is executed based on the data relating to surface A of the images constituting the two-page print job. In step 310, the printer switches the paper position to a position on the TPH2 side. In step 311, the surface B of the paper surface is set as a surface to be printed by TPH2. In step 312, for example, printing is executed in an appropriate order based on the corresponding image data relating to surface B among the data constituting the two-page print job. If the printer determines in step 306 that the paper position is on the TPH2 side, the paper surface B is set as the next print target surface as in step 314. In step 313, the printer refers to the corresponding image data. In step 315, for example, printing is executed in an appropriate order based on the corresponding image data of the image data related to the two-page print job. In step 316, the paper position in the printer is switched to the TPH1 side. As in step 317, the surface to be printed by TPH1 is surface A of the paper surface. In step 318, printing is performed based on the corresponding image data. In step 319, a determination is made as to whether additional image data should be printed. If the determination result is yes, the operation of the present algorithm returns to step 302, and image data and surface identifiers for two more pages or the last page are extracted. If no, the print job is terminated.

  According to this method, it is possible to cope with complications due to reasons such as odd-numbered print jobs, simplex printing, jamming, and other printer errors. The advantage of this method over the method of FIG. 11 is that image data may be transmitted in ascending or descending order without changing the order according to the printer position.

  6 Digital scanner, 10 Host computer, 12 Data bus, 14 CPU, 16 Read only memory (ROM), 18 Network connection device, 20 Hard disk drive (HDD), 22 Random access memory (RAM), 24 Display interface device, 26 Printer Interface device, 28 Desktop interface device, 30 CD-R / W drive, 32 DVD drive, 34 USB interface device, 40 DVD medium, 42 CD medium, 44 mouse, 46 keyboard, 50 printer, 52 video display, 60 external network, 100 one side of printing paper, 101 other side of printing paper, 110 roll printing paper, 112, 141 pinch roller, 113 driv Roller (feed roller), 117 thermal print head (TPH1), 121, 133 paper feed path, 123, 131 platen roller, 124, 130 sensor, 125 output guide, 126 cutter, 127 roller, 128 paper catch tray (exit tray) 137 Thermal Printhead (TPH2), 171-173, 200-218, 301-319 Steps, 910, 911, 920, 921, 930, 931, 940, 941, 950, 951 pages (paper surface).

Claims (20)

A printer having two printheads;
A sensor for detecting the position of the roll receiver medium in the printer;
A roller for starting execution of a print job having a plurality of pages;
And a printing system that starts execution of the next print job using the print head corresponding to the position of the roll-shaped receiver medium in the printer.   2. The printing system according to claim 1, wherein the data supplied from the sensor indicates that the receiver medium is located on the side of the print head for printing even-numbered pages in a multi-page print job. A printing system that starts execution of the print job from the second page based on the data.   The printing system according to claim 1, wherein when the next print job is a duplex print job having a plurality of even-numbered pages and a plurality of odd-numbered pages, even-numbered pages and odd-numbered pages are paired to form a pair. A printing system that executes the duplex print job in units of pairs so that are sequentially printed.   4. The printing system according to claim 3, wherein a plurality of even pages and a plurality of odd pages constituting a duplex print job are output from the printer in an order corresponding to the page order.   The printing system according to claim 4, wherein the printer outputs data from the printer in a face-down order in which the previous page faces downward.   4. The printing system according to claim 3, wherein two print heads are operated so that an even page is printed by one print head and an odd page is printed by the other print head among pages constituting a duplex print job. system. Generating print data for a print job having a plurality of pages;
Determining the position of the roll receiver medium in the thermal printer;
Depending on the position of the receiver medium in the thermal printer, sending print data relating to any one of a plurality of pages, and then sending print data relating to any other page to the printer;
A printing method comprising:   8. The printing method according to claim 7, wherein sending the print data to the printer includes sending the print data relating to the second page of the print job before sending the print data relating to the first page of the print job. Including printing method.   8. The printing method according to claim 7, wherein the step of determining the position of the receiver medium includes the step of determining on which side of the two thermal print heads the receiver medium is positioned.   10. The printing method according to claim 9, wherein when the next print job is a simplex print job, the print head used for printing the last page of the previous print job is used among the two print heads. A printing method including a step of printing all pages in a simplex print job.   10. The printing method according to claim 9, wherein the step of determining the position of the receiver medium is dedicated to printing even-numbered pages in a print job. A printing method including a step of detecting being on a print head side.   10. The printing method according to claim 9, wherein when the next print job is a duplex print job having a plurality of even-numbered pages and a plurality of odd-numbered pages, even-numbered pages and odd-numbered pages are paired to form a pair. A printing method comprising a step of executing the duplex print job in units of the pair so that are sequentially printed. Receiving and storing print data relating to a print job having a plurality of pages on the printer side;
Determining on the printer side the position of the roll receiver medium in the printer;
Depending on the position of the receiver medium in the printer, a step in which the printer performs printing based on the print data relating to any one of the plurality of pages and then the print data relating to any other page;
A printing method comprising:   14. The printing method according to claim 13, wherein the step of executing printing prints based on the print data related to the second page of the print job before printing based on the print data related to the first page of the print job. A printing method including steps.   15. The printing method according to claim 14, wherein in the step of determining the position of the receiver medium on the printer side, on which side of the two thermal print heads provided in the printer the roll-shaped receiver medium is positioned. A printing method including a step of determining.   16. The printing method according to claim 15, wherein when the next print job is a simplex print job, the print head used for printing the last page of the previous print job is used among the two print heads. A printing method including a step of printing all pages in a simplex print job.   16. The printing method according to claim 15, wherein the step of determining the position of the receiver medium includes the step of determining the position of the receiver medium, wherein one of the print heads provided in the printer is dedicated to printing even pages in the print job. A printing method including a step of detecting that the print head is on the even page dedicated print head side.   16. The printing method according to claim 15, wherein when the next print job is a duplex print job having a plurality of even-numbered pages and a plurality of odd-numbered pages, even-numbered pages and odd-numbered pages are paired to form a pair. A printing method comprising a step of executing the duplex print job in units of the pair so that are sequentially printed. Storing a print job having a plurality of pages;
Determining on the printer side the position of the roll-shaped receiver medium in the printer, in particular which of the two thermal print heads provided in the printer is closer to the receiver medium;
Depending on which of the two thermal print heads is closer to the receiver medium, the printer starts a duplex print job which is the next print job using one of the print heads;
And the step of starting the next print job uses the thermal print head which is determined to be close to the receiver medium among the two thermal print heads when starting the next print job. A printing method comprising: printing a first page of a next print job using a thermal print head that is determined not to be close to a receiver medium after printing a second page of a print job.   20. The printing method according to claim 19, wherein when the next print job is a duplex print job having a plurality of even-numbered pages and a plurality of odd-numbered pages, a pair of even-numbered pages and odd-numbered pages are paired. A method of causing the printer to execute the duplex print job in units of pairs so that the printers are successively printed.

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