Image forming device, method for controlling the same, and program

Abstract

To provide a mechanism for facilitating identification as to which sheet storage part which sheet has been conveyed when a chart for a test is printed on sheets conveyed from a plurality of sheet holders.SOLUTION: This image forming device comprises: printing means; and control means configured control the printing means for conveying a first sheet from a first sheet holder, and printing an image for print testing and first identification information for identifying the first sheet holder on the first sheet on the basis of the fact that first sheet is a sheet conveyed from the first sheet holder, conveying a second sheet from a second sheet holder, and printing an image for print testing and second identification information for identifying the second sheet holder on the second sheet on the basis of the fact that second sheet is a sheet conveyed from the second sheet holder.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to an image forming apparatus, a control method for an image forming apparatus, and a program. [Background technology]

[0002] 2. Description of the Related Art Conventionally, in an image processing apparatus that forms an image on a sheet, a test chart print function is used to check whether an image is normally formed on the sheet.

[0003] Patent Document 1 discloses a technique in which a sheet is conveyed from each of a plurality of sheet holding units, a chart is printed on the conveyed sheet, and adjustment is performed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2022-110889 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the test chart print function, an image printed for confirmation (hereinafter referred to as a "test chart image") is printed on sheets transported from multiple sheet storage units and discharged continuously, which makes it difficult to determine which sheet was transported from which sheet storage unit.

[0006] The invention according to claim 1 of the present application has been made in view of the above problems. The object of the present invention is to provide a mechanism that makes it easy to determine which sheet has been transported from which sheet storage unit when printing a test chart on sheets transported from multiple sheet holding units. [Means for solving the problem]

[0007] The invention of claim 1 of the present application is characterized by having a printing means, and a control means for controlling the printing means to transport a first sheet from a first sheet holding section and, based on the fact that the first sheet is a sheet transported from the first sheet holding section, print a printing test image and first identification information that identifies the first sheet holding section on the first sheet, and to transport a second sheet from a second sheet holding section and, based on the fact that the second sheet is a sheet transported from the second sheet holding section, print a printing test image and second identification information that identifies the second sheet holding section on the second sheet. Effect of the Invention

[0008] According to the invention of claim 1 of the present application, when printing a test chart on sheets transported from multiple sheet holding sections, it is possible to easily determine which sheet was transported from which sheet storage section. [Brief description of the drawings]

[0009] [Figure 1] Block diagram showing the configuration of the MFP100 [Diagram 2] Cross-sectional view showing the structure of the MFP100 [Diagram 3] Test chart print sequence diagram [Figure 4] FIG. 1 is a diagram showing a sequence of printing a test chart in the first embodiment. [Diagram 5] FIG. 1 shows a screen displayed on an operation unit 150 in the first embodiment. [Figure 6] FIG. 1 is a diagram showing an example of a test chart in the first embodiment. [Figure 7] Flowchart of test chart printing in the first embodiment [Figure 8] FIG. 13 is a diagram showing an example of a test chart in the second embodiment. [Figure 9] Flowchart of test chart printing in the second embodiment DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the scope of the present invention, and not all of the combinations of features described in the embodiments are necessarily essential to the solution of the present invention.

[0011] <Example 1> 1 is a block diagram showing the configuration of an MFP 100 as an example of an image forming apparatus. MFP is an abbreviation for Multi Function Peripheral.

[0012] The MFP 100 includes a control unit 110, a scanner 130, a printer 140, and an operation unit 150. The scanner 130 is an example of an image input device. The printer 140 is an example of an image output device.

[0013] The control unit 110 is connected to the scanner 130 and the printer 140 and can communicate with each other. The scanner 130 scans an original based on a scan instruction from the control unit 110, and outputs image data generated by the scan to the control unit 110. The printer 140 executes printing based on the image data output from the control unit 110 based on a print instruction from the control unit 110.

[0014] The operation unit 150 has a touch panel and hard keys. The touch panel is configured by attaching a touch panel sheet to a liquid crystal display unit. The operation unit 150 accepts operations and instructions from a user via the touch panel sheet and hard keys. The operation unit 150 also displays various information and image data on the liquid crystal display unit.

[0015] The control unit 110 has a CPU 111, a RAM 112, a ROM 113, a storage unit 114, a network I / F 115, a device I / F 116, an operation unit I / F 117, an image processing unit 118, and an image memory 119. CPU is an abbreviation for Central Processing Unit. RAM is an abbreviation for Random Access Memory. ROM is an abbreviation for Read Only Memory. I / F is an abbreviation for Interface.

[0016] The CPU 111 reads out a program stored in the ROM 113 or the storage unit 114 into the RAM 112 and executes the program, thereby providing overall control over the MFP 100. For example, the CPU 111 controls the scanner 130 to read an original document and the printer 140 to output the same.

[0017] The RAM 112 functions as a working area for the CPU 111 .

[0018] The ROM 113 is a boot ROM, and stores the boot program of the system.

[0019] Storage unit 114 stores system software, image data, programs for controlling the operation of MFP 100, and the like.

[0020] The network I / F 115 is connected to a LAN and controls input and output of various information between the MFP 100 and an external PC. LAN is an abbreviation for Local Area Network. PC is an abbreviation for Personal Computer. Note that although the LAN will be described as being wired, it may be wireless.

[0021] The device I / F 116 connects the scanner 130 and printer 140 to the control unit 110, and performs synchronous / asynchronous conversion of image data.

[0022] The operation unit I / F 117 is an interface that connects the operation unit 150 and the control unit 110, and outputs image data for display to the operation unit 150. In addition, the operation unit I / F 117 transmits information received from a user via the operation unit 150 to the CPU 111.

[0023] The image processing unit 118 performs image processing on print data received via the LAN, and also performs image processing on image data input / output by the device I / F 116.

[0024] The image memory 119 is a memory for temporarily storing image data to be processed by the image processing unit 118 .

[0025] Such MFP 100 executes a copy job in which an image of an original is read by scanner 130, and an image is printed by a printer based on the image data of the read original. MFP 100 also executes a print job in which it receives print data via a LAN, generates image data by image processing unit 118 based on the received print data, and prints by printer 140 based on the generated image data.

[0026] In addition, the MFP 100 has a test chart printing function that prints a test chart (image for printing tests) to allow an operator to check whether an image is printed correctly on a sheet. A specific pattern is printed on the test chart, and the user checks the density, whether there are any missing parts, etc. by looking at the pattern.

[0027] The operator manages the sheets used for printing on the MFP 100 using a database called a cassette library. The cassette library is stored in the storage unit 114 or the RAM 112, and is read and written by each software module as necessary.

[0028] Next, the structure and operation of MFP 100 will be described.

[0029] 2 is a cross-sectional view showing the structure of image forming apparatus 100 in this embodiment. As shown in the figure, image forming apparatus 100 has a housing 201. Housing 201 houses each mechanism constituting an engine unit, an engine control unit that controls printing by each mechanism, and a control board storage unit that stores a printer controller.

[0030] The mechanisms constituting the engine section include an optical processing mechanism for forming an electrostatic latent image on the photosensitive drum 205 by scanning with a laser beam, visualizing the electrostatic latent image, multiply transferring the visual image onto the intermediate transfer body 252, and further transferring the multiply transferred color image onto a sheet P. The mechanisms constituting the engine section further include a fixing processing mechanism for fixing the toner image transferred onto the sheet P, a paper feed processing mechanism for the sheet P, and a transport processing mechanism for the sheet P. As the paper feed processing mechanism, paper feed cassette 1, paper feed cassette 2, and paper feed cassette 3 are provided. The transport processing mechanism can transport a sheet from any one of paper feed cassette 1, paper feed cassette 2, and paper feed cassette 3.

[0031] The optical processing mechanism includes a laser driver that drives a laser beam emitted from a semiconductor laser (not shown) in a laser scanner unit 207 to turn on and off in response to image data supplied from a printer controller 203. The laser beam emitted from the semiconductor laser is deflected in the scanning direction by a rotary polygon mirror 208. The laser beam deflected in the main scanning direction is guided to a photosensitive drum 205 via a reflecting polygon mirror 209, and exposes the surface of the photosensitive drum 205 in the main scanning direction. Meanwhile, an electrostatic latent image formed on the photosensitive drum 205 by scanning exposure with a laser beam, which is charged by a primary charger 211, is visualized into a toner image by a toner supplied by a developing device 212 described later. The visualized toner image on the photosensitive drum 205 is then transferred (primary transfer) onto an intermediate transfer body 252 to which a voltage having the opposite characteristics to that of the toner image is applied (first transfer). When forming a color image, each color is sequentially formed on the intermediate transfer body 252 from a Y (yellow) station 220, an M (magenta) station 221, a C (cyan) station 222, and a K (black) station 223. As a result, a full-color visible image is formed on the intermediate transfer body 252.

[0032] Next, sheet P is transported from paper feed cassette 1, and the transfer roller 251 presses sheet P against intermediate transfer body 252, while at the same time applying a bias having opposite characteristics to the toner to the transfer roller 251. As a result, the visible image formed on intermediate transfer body 252 is transferred (secondary transfer) onto sheet P, which is transported by the paper feed processing mechanism in synchronization with the transport direction (sub-scanning direction) of sheet P. Sheets can also be fed from paper feed cassette 2 or paper feed cassette 3 in the same manner. Note that the paper feed cassette is an example of a sheet holding unit, and the sheet holding unit may be a manual feed tray.

[0033] After the secondary transfer, the sheet P passes through the fixing device 260, whereby the toner transferred onto the sheet P is heated and melted, and fixed as an image on the sheet P. In the case of double-sided printing, the sheet passes through the inversion section 270, switches back and is reversed, and is introduced again into the transfer section 240, whereby the back-side image is transferred onto the sheet P. Thereafter, the sheet P passes through the fixing device 260 in the same manner as above, whereby the toner image on the sheet P is heated and fixed, and the sheet is output to the output tray 280, completing the printing process.

[0034] The image forming apparatus 100 also includes a scanner 202. The scanner 202 includes each of the mechanisms constituting the scanner, a scanner control unit for controlling the document reading process by each of the mechanisms (e.g., document transport process, etc.), and a control board housing unit for housing a scan controller.

[0035] The mechanisms constituting the scanner include transport rollers 231 and 232 for transporting a document 237 placed on an automatic document feeder (ADF). In addition, a detection sensor 233 for detecting the passage of the transported document, a reading sensor 235 for reading the document image, and the like are also provided.

[0036] Next, a series of processes in conventional test chart printing will be explained using the sequence diagram in Fig. 3. In test chart printing, communication takes place between the operator and the MFP.

[0037] In S301, the operator presses the test chart print button.

[0038] When the test chart print button is pressed, the MFP determines that test chart printing should be started, and in S302, displays a test chart print setting screen.

[0039] In S303, the operator designates the type of test chart to be printed in the test chart print.

[0040] In S304, the operator designates an image processing mode, such as error diffusion or screen processing, for printing halftone densities.

[0041] In S305, the operator designates a paper feed cassette for printing a test chart.

[0042] In S306, the operator specifies whether the test chart is to be printed on one side or on both sides. If double-sided printing is specified, the MFP prints the same test chart image specified in S303 on both the front and back sides.

[0043] In S307, the operator designates the number of sheets of the test chart to be output. When the output of multiple sheets is designated, the MFP conveys multiple sheets from the paper feed cassette designated in S305 and prints the test chart image.

[0044] When the test chart print settings are completed in S303 to S307, the operator presses a test chart print execution button in S308. When the test chart print execution button is pressed, the MFP executes printing of the test chart in S309. The output test charts are stacked and discharged onto the paper output tray.

[0045] In S310, the operator additionally specifies a paper feed cassette different from the paper feed cassette specified in S305.

[0046] In S311, the operator presses the test chart print execution button.

[0047] When the test chart print execution button is pressed, in S312, the MFP conveys a sheet from the paper feed cassette specified in S310 and executes printing of a test chart.

[0048] The operator repeats the above steps until all the paper feed cassettes to be used for test chart printing have been output. When all the required test chart printing operations have been completed, the operator presses the test chart printing end button in S313 to end the test chart printing operation.

[0049] 4 is a sequence diagram showing a series of processes in test chart printing according to this embodiment. In test chart printing, communication takes place between the operator and the MFP 100. In test chart printing according to this embodiment, test charts are output from a plurality of paper feed cassettes that the MFP 100 has.

[0050] In S401, the operator presses the test chart print button.

[0051] When the test chart print button is pressed, the MFP 100 determines that test chart printing should be started, and in S402 causes the operation unit 150 to display a test chart print setting screen.

[0052] In S402, the CPU 111 of the MFP 100 causes the operation unit 150 to display a test chart print setting screen.

[0053] In S403, the operator specifies the type of test chart to be printed in the test chart print. The test chart may be, for example, a geometric figure such as a grid pattern, or an image with a density specified by the operator. Also, the test chart may be a combination of a plurality of such images.

[0054] In S404, the operator specifies an image processing mode, such as error diffusion or screen processing, for printing halftone densities. Here, the operator specifies a combination of setting values ​​that indicates that test charts are to be output from all paper feed cassettes. When the setting values ​​of the test chart type and image processing mode are a specific combination, the MFP 100 determines that an operation to output test charts from all paper feed cassettes has been specified. In this embodiment, it is possible to specify that test charts are to be output from all paper feed cassettes using existing test chart types and image processing modes, but it is also possible to specify this by providing a dedicated mode specification button.

[0055] In S405, the operator specifies whether to print the test chart in single-sided printing or double-sided printing. If double-sided printing is specified, the MFP 100 prints the same test chart image specified in S403 on both the front and back sides.

[0056] In S406, the operator designates the number of sheets of the test chart to be output. When the output of multiple sheets is designated, the MFP 100 conveys multiple sheets from the paper feed cassette designated in S405 and prints the test chart image.

[0057] When the test chart print settings are completed in S403 to S406, the operator presses a test chart print execution button in S407.

[0058] When the test chart print execution button is pressed, CPU 111 of MFP 100 starts printing the test charts starting from paper feed cassette 1. First, in S408, CPU 111 controls to transport a sheet from paper feed cassette 1, print a test chart on the transported sheet, and output it. Next, in S409, CPU 111 controls to transport a sheet from paper feed cassette 2, print a test chart on the transported sheet, and output it. Furthermore, in S410, CPU 111 controls to transport a sheet from paper feed cassette 3, print a test chart on the transported sheet, and output it.

[0059] If there are four or more paper feed cassettes, in S411, a sheet is conveyed from the last paper feed cassette N mounted in the MFP 100, and a test chart is printed on the conveyed sheet and output. The test charts are discharged in a stack onto the same paper discharge tray 280 of the printer 140.

[0060] If multiple sheets of charts are specified to be output in S406, the CPU 111 controls the printer 1 to convey sheets again in order from the paper feed cassette 1, print test charts on the conveyed sheets, and output them. The CPU 111 repeats this operation until the specified number of test charts are output.

[0061] When all the necessary test chart printing operations have been completed, the operator presses the test chart printing end button in S412 to end the test chart printing operation.

[0062] Fig. 5 shows an example of a test chart print setting screen displayed on the operation unit 150 in S402 of Fig. 4. When the operator presses the test chart print button in S401, the CPU 111 causes the operation unit 150 to display a test chart print setting screen 501.

[0063] Chart type number 502 is an item for setting the type of test chart. Input field 503 is an input field for inputting a setting value, and range 504 displays the range within which the setting value can be set. When 0 is input into input field 503, a test chart of a first image pattern is set to be output, and when 1 is input into input field 503, a test chart of a second image pattern is output. When setting this chart type number 502, it is also possible to select a mode for continuously printing multiple test charts. When 80 is input into input field 503, the mode for continuously printing multiple test charts is selected.

[0064] Image mode 505 is an item for setting an image processing mode. In image mode 505, the type of halftoning processing, such as error diffusion or screen processing, can be set. An input field 506 is an input field for inputting a setting value, and a range 507 displays the range in which the setting value can be set. When 0 is input into input field 506, it is set to perform error diffusion, and when 1 is input into input field 506, it is set to perform screen processing. Furthermore, when 10 is input into input field 506, a mode is set in which test chart printing is performed from all paper feed cassettes.

[0065] A paper feed cassette 508 is an item for setting a paper feed cassette specified by the operator in S305. An input field 509 is an input field for inputting a setting value, and a range 510 indicates a range in which the setting value can be set. The number of paper feed cassettes included in the MFP 100 may be set as an upper limit of this range.

[0066] Double-sided printing 511 is an item for setting double-sided printing. An input field 512 is an input field for inputting a setting value, and a range 513 displays the range in which the setting value can be set. An operator can set double-sided printing by inputting a value of 1 into input field 512, and can set single-sided printing by inputting a value of 0.

[0067] The number of prints 514 is an item for setting the number of test charts to be outputted. An input field 515 is an input field for inputting a setting value, and a range 516 indicates the range within which the setting value can be set.

[0068] A print start button 517 is a test chart print execution button pressed by the operator in S407.

[0069] FIG. 6 is an example of a test chart output by the test chart print in this embodiment.

[0070] Reference numeral 601 denotes an example of outputting a grid image as a test chart. As described above, the test chart output in this embodiment is not limited to a grid, and may be other geometric figures, an image with a density specified by an operator, or a combination of a plurality of these images.

[0071] Reference numeral 602 denotes information indicating the number of the paper feed cassette from which the sheet on which the test chart is printed is transported. In the test chart printing of this embodiment, a character string capable of identifying the paper feed cassette that fed the sheet is printed on the test chart and output. The printed character string is not limited to the example in FIG. 6, and may be only the number or symbol of the paper feed cassette, as long as it is capable of identifying the paper feed cassette.

[0072] Reference numeral 603 indicates the sheet transport direction when the test chart is printed by the MFP 100. The paper feed cassette identification character string 602 is printed at a fixed position relative to the sheet transport direction, making it possible to identify the print direction of the test chart. Fig. 6 shows an example in which the paper feed cassette identification character string 602 is printed at the upper left position relative to the sheet transport direction.

[0073] Fig. 7 is a flowchart showing the details of the test chart print process in this embodiment, the sequence of which is shown in Fig. 4. Each step in the flowchart in Fig. 7 is realized by the CPU 111 reading a program stored in the ROM 113 into the RAM 112 and executing the program.

[0074] In S701 to S704, the CPU 111 displays the test chart print setting screen 501 on the operation unit 150, and accepts settings for test chart printing via the operation unit 150.

[0075] In S701 , the CPU 111 accepts the setting of the type of test chart and stores it in the RAM 112 .

[0076] In S 702 , the CPU 111 accepts the setting of the image processing mode and stores it in the RAM 112 .

[0077] In step S703 , the CPU 111 accepts the settings of the paper feed cassette and stores them in the RAM 112 .

[0078] In S704, the CPU 111 accepts the setting of the number of sheets of the test chart to be output, and stores it in the RAM 112.

[0079] The execution order of steps S701 to S704 may be rearranged in the order received from the operator, and steps may be skipped for items that are not changed from the default values. After completing the settings of S701 to S704, the operator presses the test chart print execution button 517 via the operation unit 150.

[0080] When the test chart print execution button 517 is pressed, in S705, the CPU 111 determines whether the chart type accepted in S701 and the image processing mode accepted in S702 are a specific combination. When 80 is input in the input field 503 of the chart type number 502 and 10 is input in the input field 506 of the image mode 505, the CPU 111 determines that it is a specific combination. On the other hand, when other settings are made, it determines that it is not a specific combination. When it is determined that it is a specific combination, the CPU 111 advances the process to S710, and when it is determined that it is not a specific combination, the CPU 111 advances the process to S706. Note that only one of the input field 503 of the chart type number 502 and the input field 506 of the image mode 505 may be used as the criterion for the determination. In that case, specifically, when 80 is input in the input field 503 of the chart type number 502, the CPU 111 advances the process to S710 regardless of the value of the input field 506 of the image mode 505. If a value other than 80 is entered in input field 503, CPU 111 advances the process to S706. Alternatively, control may be performed as follows: If 10 is entered in input field 506 of image mode 505, CPU 111 advances the process to S710, regardless of the value in input field 503 of chart type number 502. If a value other than 10 is entered in input field 506, CPU 111 advances the process to S706.

[0081] If the processing proceeds to S706, the CPU 111 generates a test chart (image) of the type set in S701, performs image processing in the image processing mode set in S702 in the image processing unit 118, and stores the processed test chart in the image memory 119.

[0082] Then, in S707, the CPU 111 controls the printer 140 to feed one sheet from the paper feed cassette set in S703.

[0083] In S708, the CPU 111 reads out the test chart generated in S706 from the image memory 119 for the sheet fed in S707, and transmits it to the printer 140 to print the test chart on the sheet.

[0084] In S709, the CPU 111 determines whether the output of the test chart of the number of sheets set in S704 has been completed. If it is determined that the output of the set number of sheets has not been completed, the CPU 111 advances the process to S706 and executes the processes from S706 to S708 again. If it is determined that the output of the set number of sheets has been completed, the CPU 111 ends the test chart print process shown in FIG.

[0085] On the other hand, if the process proceeds from S705 to S710, the CPU 111 acquires information on all of the paper feed cassettes mounted in the MFP 100 in S710.

[0086] Then, the process proceeds to S711, where the CPU 111 selects one paper feed cassette from which a test chart has not yet been output.

[0087] In step S712, the CPU 111 acquires a paper feed cassette number for identifying the paper feed cassette. The paper feed cassette number is an example of information that can identify the paper feed cassette. The paper feed cassette number may be a symbol other than a number.

[0088] In S713, the CPU 111 generates a test chart image and causes the image processing unit 118 to perform image processing, and stores the processed image data in the image memory 119. In this embodiment, when a test chart is output from all of the paper feed cassettes, a predetermined type and image processing mode are used for the test chart type and image processing mode. However, even when a test chart is output from all of the paper feed cassettes, the test chart type and image processing mode may be set, and a test chart image may be generated using the set test chart type and image processing mode.

[0089] In S714, the CPU 111 generates a character string image 602 for printing the paper feed cassette number acquired in S712 on the test chart image based on the paper feed cassette number acquired in S712. As described above, the character string image of the paper feed cassette number may be only numbers or symbols as long as it can identify the paper feed cassette.

[0090] In S715, the CPU 111 combines the generated character string image 602 with the test chart image generated in S713, and stores the combined image data in the image memory 119.

[0091] In S716, the CPU 111 feeds one sheet from the paper feed cassette selected in S711.

[0092] In S717, the CPU 111 reads out the test chart image data synthesized in S715 from the image memory 119, and transmits it to the printer 140, causing the printer 140 to print the test chart image on the fed sheet.

[0093] Then, in S718, the CPU 111 determines whether or not the output of the test chart has been completed from all the paper feed cassettes mounted in the MFP 100. If there is a paper feed cassette for which a test chart has not been output, the CPU 111 returns to S711, selects one of the paper feed cassettes for which a test chart has not been output, and performs the output process of the test chart.

[0094] On the other hand, if the output of the test charts from all the paper feed cassettes is complete, the CPU 111 proceeds to S719 and determines whether the output of the number of test charts set in S704 is complete. If the output of the set number of sheets is not complete, the CPU 111 returns to S710 and executes the process of outputting the test charts from all the paper feed cassettes again. If the output of the set number of sheets is complete, the CPU 111 ends the test chart print process.

[0095] As described above, by printing a character string for identifying the paper feed cassette on the test chart, it becomes possible to identify the paper feed cassette that fed the paper of the printed result. Also, a test chart can be printed by printing a test chart image from multiple paper feed cassettes with a single print command for the test chart. In this case, by printing a character string for identifying the paper feed cassette on the test chart, it becomes possible to identify the paper feed cassette that fed the paper of the printed result. Note that, although the present embodiment has been described with respect to a case where the function is executed as a test chart print function operated by an operator (service representative), it can also be applied to a function operated by a user.

[0096] <Example 2> In the second embodiment, a mode for carrying out the present invention will be described with reference to the drawings in which a character string for identifying the MFP 100 and the execution date and time of the test chart are printed on the test chart in addition to a character string for identifying the paper feed cassette.

[0097] A detailed description of the parts common to the first embodiment will be omitted, and only the differences from the first embodiment will be described.

[0098] Fig. 8 shows an example of a test chart output by the test chart print of this embodiment. A test chart 801 in Fig. 8(a) shows an example of outputting an image with a halftone density as a test chart. As described in the first embodiment, the test chart output in this embodiment is not limited to a specific image, and may be a geometric figure such as a grid pattern or a combination of multiple images.

[0099] Character string 802 is a character string indicating the number of the paper feed cassette that fed the sheet on which the test chart is to be printed. In the test chart printing of this embodiment, a character string that can identify the paper feed cassette that fed the sheet is printed on the test chart and output. The character string to be printed may be other than the example shown in character string 802 as long as it can identify the paper feed cassette, and may be only the number or symbol of the paper feed cassette.

[0100] Character string 803 is a character string indicating a machine number that identifies the machine of MFP 100. The test chart print of this embodiment is useful for identifying the MFP that printed the test chart in an environment where multiple MFPs are installed. Any information other than the machine number indicated in character string 803 may be used as long as it is information that can identify the machine of the MFP.

[0101] Character string 804 is a character string indicating the date and time when test chart printing was performed. Character string 804 is useful for identifying the date and time when printing was performed when test chart printing was performed multiple times with the same MFP. Note that character string 804 is an example of time information, and the time information may be a character string in a format other than that shown in character string 804. For example, the information may not include the date and may include only the time.

[0102] A direction 805 indicates the sheet transport direction when the test chart is printed by the image forming apparatus 100. The identification character string 802 of the paper feed cassette, the machine number 803 of the image forming apparatus, and the test chart print date and time 804 are always printed at a fixed position with respect to the sheet transport direction, so that the print direction of the test chart can be identified. Fig. 8 shows an example in which the identification information 802 to 804 are printed at the upper left position with respect to the sheet transport direction.

[0103] Test chart 806 in FIG. 8B shows an example of outputting a four-color halftone density image as a test chart. As in this example, the test chart output in this embodiment may be an image output in color, not just monochrome. Image 807 in FIG. 8B shows an image of halftone density printed in yellow, and similarly image 808 shows an image printed in magenta, image 809 shows an image printed in cyan, and image 810 shows an image printed in black. The test chart is not limited to an image of halftone density, and may be a geometric figure such as a four-color grid, a combination of multiple images, or a color figure of only one of YMCK colors.

[0104] 8A, character string 811 is a character string indicating the number of the paper feed cassette that fed the sheet on which the test chart is to be printed. In the test chart printing of this embodiment, a character string that can identify the paper feed cassette that fed the sheet is printed on the test chart, and the sheet is output. The character string to be printed may be other than the example shown in 811 as long as it can identify the paper feed cassette, and only the number or symbol of the paper feed cassette may be printed.

[0105] Similarly, character string 812 is a character string indicating a machine number that identifies the machine of MFP 100. In the test chart printing of this embodiment, in an environment where multiple MFPs are installed, the machine number is printed and output as a character string that can identify the MFP that printed the test chart. Any information other than the machine number indicated in 812 may be used as long as it can identify the MFP.

[0106] Character string 813 is a character string indicating the date and time when the test chart was printed. When the same MFP prints a test chart multiple times, character string 813 is used to print and output the date and time as a character string that can identify the date and time when the print was performed. The date and time may be a character string in a format other than that shown in 813.

[0107] A direction 814 indicates the paper transport direction when the test chart is printed by the image forming apparatus 100. The paper feed cassette identification character string 811, the image forming apparatus machine number 812, and the test chart print date and time 813 are always printed at a fixed position relative to the sheet transport direction, making it possible to identify the print direction of the test chart. Fig. 8(b) shows an example in which the identification information 811 to 813 are printed at the upper left position relative to the sheet transport direction.

[0108] Test chart 815 in Fig. 8(c) shows an example of outputting an adjustment image for adjusting the print position of an image as a test chart. The print position adjustment image is an image created in advance as image data and stored in storage unit 114 of MFP 100, and when test chart printing is executed, this image data is read out from storage unit 114 and printed on a sheet. In this way, the test chart output in this embodiment may be one that outputs image data.

[0109] 816 in FIG. 8(c) represents a scale for checking the misalignment of the print position. The image allows checking the misalignment of the print position of the image depending on the output state of this scale. Image 817 is an image for explaining a method for checking the print position checking scale 816. This is an image for explaining a method for determining the amount of misalignment of the print position corresponding to the output state of the print position checking scale. Image 818 is an image showing whether the print surface of the test chart is the front side or not, and this makes it possible to determine which side of the output paper on which the test chart is printed is the front side and which side is the back side. The test chart on which image data is printed may be other than the image for adjusting the image print position shown in image 818, and it is also possible to print an image for adjusting items other than the image print position or an image for checking operation.

[0110] As in Fig. 8(a), 819 is a character string indicating the number of the paper feed cassette that fed the sheet on which the test chart is to be printed. In the test chart printing of this embodiment, a character string that can identify the paper feed cassette that fed the sheet is printed on the test chart and output. The character string to be printed may be other than the example shown in the character string 819 as long as it can identify the paper feed cassette, and only the number or symbol of the paper feed cassette may be printed.

[0111] Similarly, character string 820 is a character string indicating a machine number that identifies the machine of image forming apparatus 100. In the test chart printing of this embodiment, in an environment where multiple MFPs are installed, the machine number is printed and output as a character string that can identify the MFP that printed the test chart. Any information other than the machine number indicated in 820 may be used as long as it can identify the MFP.

[0112] Character string 821 is a character string indicating the date and time when the test chart was printed. In the test chart printing of this embodiment, when the test chart is printed multiple times using the same MFP, the date and time are printed and output as a character string that can identify the date and time when the print was performed. The date and time may be a character string other than the format shown in 821.

[0113] A direction 822 indicates the sheet transport direction when the test chart is printed by the MFP 100. The paper feed cassette identification character string 819, the MFP 100 machine number 820, and the test chart print date and time 821 are always printed at a specific position relative to the sheet transport direction, making it possible to identify the print direction of the test chart. Fig. 8(c) shows an example in which the identification information 819 to 821 are printed at the upper left position relative to the paper transport direction.

[0114] Fig. 9 is a detailed flow of the test chart print process in this embodiment. Each step of the flow chart in Fig. 9 is realized by the CPU 111 reading a program stored in the ROM 113 into the RAM 112 and executing it.

[0115] In steps S901 to S904, the CPU 111 displays the test chart print setting screen 501 on the operation unit 150, and accepts settings for test chart printing via the operation unit 150.

[0116] In S901 , the CPU 111 accepts the setting of the test chart type and stores it in the RAM 112 .

[0117] In S902 , the CPU 111 accepts the setting of the image processing mode and stores it in the RAM 112 .

[0118] In step S903 , the CPU 111 accepts the settings of the paper feed cassette and stores them in the RAM 112 .

[0119] In S904 , the CPU 111 accepts the setting of the number of sheets of the test chart to be output, and stores it in the RAM 112 .

[0120] The execution order of steps S901 to S904 may be rearranged in the order received from the operator, or steps may be skipped for items that are not changed from the default values. After completing the settings of S901 to S904, the operator presses the test chart print execution button 517 via the operation unit 150.

[0121] When the test chart print execution button 517 is pressed on the operation unit 150, in S905 the CPU 111 determines whether the chart type accepted in S901 and the image processing mode accepted in S902 are a specific combination. If 80 is entered in the input field 503 of the chart type number 502 and 10 is entered in the input field 506 of the image mode 505, the CPU 111 determines that it is a specific combination. On the other hand, if any other setting is made, it determines that it is not a specific combination. If it is determined that it is a specific combination, the CPU 111 advances the process to S910, and if it is determined that it is not a specific combination, the CPU 111 advances the process to S906. Note that only one of the input field 503 of the chart type number 502 and the input field 506 of the image mode 505 may be used as the criterion for the determination. In that case, specifically, if 80 is entered in input field 503 of chart type number 502, CPU 111 advances the process to S910, regardless of the value in input field 506 of image mode 505. If a value other than 80 is entered in input field 503, CPU 111 advances the process to S906. Alternatively, control may be performed as follows. If 10 is entered in input field 506 of image mode 505, CPU 111 advances the process to S910, regardless of the value in input field 503 of chart type number 502. If a value other than 10 is entered in input field 506, CPU 111 advances the process to S906.

[0122] If the processing proceeds to S906, the CPU 111 generates a test chart (image) of the type set in S901, performs image processing in the image processing mode set in S902 in the image processing unit 118, and stores the processed test chart in the image memory 119.

[0123] Then, in S907, the CPU 111 controls the printer 140 to feed one sheet from the paper feed cassette set in S903.

[0124] In S908, the CPU 111 reads out the test chart generated in S906 from the image memory 119 for the sheet fed in S907, and transmits it to the printer 140 to print the test chart on the sheet.

[0125] In S909, the CPU 111 determines whether the output of the test chart of the number of sheets set in S904 has been completed. If it is determined that the output of the set number of sheets has not been completed, the CPU 111 advances the process to S906 and executes the processes from S906 to S908 again. If it is determined that the output of the set number of sheets has been completed, the CPU 111 ends the test chart print process shown in FIG.

[0126] On the other hand, if CPU 111 determines in S905 that the setting is to output a test chart from all paper feed cassettes, the process proceeds to S910, where CPU 111 acquires information on all paper feed cassettes installed in image forming apparatus 100. Then, the process proceeds to S911, where CPU 111 selects one paper feed cassette that has not yet output a test chart, and acquires a paper feed cassette number that identifies that paper feed cassette (S912). Here, the paper feed cassette number indicates information that can identify the paper feed cassette, and may be a symbol other than a number. Also, the image forming apparatus 100 may be configured to have only one paper feed cassette installed.

[0127] Next, in S913, the CPU 111 generates a test chart image and processes the image in the image processing unit 118, and stores the processed image data 801 in the image memory 119. In this embodiment, when a test chart is output from all of the paper feed cassettes, a predetermined type and image processing mode are used. However, even when a test chart is output from all of the paper feed cassettes, the test chart type and image processing mode may be set, and a test chart image may be generated using the set test chart type and image processing mode.

[0128] Next, in S914, the CPU 111 generates a character string image 802 for printing the paper feed cassette number acquired in S912 on the test chart image based on the paper feed cassette number acquired in S912. As described above, the character string image of the paper feed cassette number may consist of only numbers and symbols as long as it can identify the paper feed cassette.

[0129] Next, in S915, the CPU 111 generates a character string image 803 for printing on the test chart image a machine number for identifying the machine of the image forming apparatus 100. As described above, the character string image of the machine number may be a character string image indicating information other than the machine number as long as it can identify the machine of the image forming apparatus.

[0130] Next, in step S916, the CPU 111 generates a character string image 804 for printing the execution date and time of the test chart print on the test chart image. As described above, the date and time may be a character string in any format as long as the character string is capable of identifying the date and time when the print was executed.

[0131] In step S917, the CPU 111 combines the character string images of the paper feed cassette number 802, the machine number 803, and the print date and time 804 generated in steps S914 to S916 with the test chart image generated in step S913, and stores the combined image data in the image memory 119.

[0132] Next, in S918, the CPU 111 feeds one sheet of output paper from the paper feed cassette selected in S911. For the sheet transported in S918, the CPU 111 reads out the test chart image data composited in S917 from the image memory 119 and transmits it to the printer 140. In S919, the CPU 111 controls so that the test chart image is printed on the sheet.

[0133] Then, in S920, the CPU 111 determines whether the output of the test chart has been completed from all the paper feed cassettes mounted in the image forming apparatus 100. If there is a paper feed cassette that has not output a test chart, the CPU 111 returns to S911 and again selects one of the paper feed cassettes that has not output a test chart, and performs the output process of the test chart.

[0134] On the other hand, if the output of the test charts from all the paper feed cassettes is complete, the CPU 111 proceeds to S921 and determines whether the output of the number of test charts set in S904 is complete. If the output of the set number of sheets is not complete, the CPU 111 returns to S910 and executes the process of outputting the test charts from all the paper feed cassettes again. If the output of the set number of sheets is complete, the CPU 111 ends the test chart print process.

[0135] As described above, when performing test chart printing in which a test chart image is printed from a paper feed cassette, it is possible to determine the image forming device, paper feed cassette, and printing date and time in which the test chart image was printed. Also, it is possible to perform test chart printing in which test chart images are printed from multiple paper feed cassettes with a single test chart print instruction. In this case, it is possible to determine the image forming device, paper feed cassette, and printing date and time in which the test chart image was printed.

[0136] In this embodiment, the case has been described where the function is executed as a test chart print function operated by an operator (service person), but the present invention can also be applied to a function operated by a user.

[0137] <Other Examples> In the above embodiment, an example has been described in which, when it is determined in S0705 or S0905 that the chart type and image mode are a specific combination, sheets are fed from all paper feed cassettes. However, the present invention is not limited to this, and the CPU 111 may receive an instruction from a user to feed sheets from all paper feed cassettes and print a test chart, and control the MFP 100 to perform the processes from S0710 to S0910 onward based on the received instruction.

[0138] The present invention can also be realized by a process in which a program for implementing one or more of the functions of the above-described embodiments is supplied to a system or device via a network or a storage medium, and one or more processors in a computer of the system or device read and execute the program. The present invention can also be realized by a circuit (e.g., ASIC) that implements one or more of the functions. [Explanation of symbols]

[0139] 111 CPU 112 RAM 113 ROM

Claims

1. A printing means; an image forming apparatus comprising: a control means for controlling the printing means to transport a first sheet from a first sheet holding section, and, based on the fact that the first sheet is a sheet transported from the first sheet holding section, print a printing test image and first identification information that identifies the first sheet holding section on the first sheet, and to transport a second sheet from a second sheet holding section, and, based on the fact that the second sheet is a sheet transported from the second sheet holding section, print a printing test image and second identification information that identifies the second sheet holding section on the second sheet.

2. The printing apparatus further includes a receiving unit for receiving an instruction to print a test image, The image forming apparatus according to claim 1, characterized in that the control means, based on a single instruction received by the receiving means, controls the printing means to transport the first sheet from the first sheet holding unit, print the printing test image and the first identification information identifying the first sheet holding unit on the first sheet based on the fact that the first sheet is a sheet transported from the first sheet holding unit, and control the printing means to transport the second sheet from the second sheet holding unit, and print the printing test image and the second identification information identifying the second sheet holding unit on the second sheet based on the fact that the second sheet is a sheet transported from the second sheet holding unit.

3. The image forming apparatus according to claim 1, characterized in that the control means controls the printing means to transport a sheet from each of all of the sheet holding units included in the plurality of sheet holding units, and to print a printing test image and identification information that identifies the sheet holding unit on the transported sheet.

4. The image forming apparatus according to claim 1, characterized in that the control means controls the printing means to transport a sheet one by one from each of the sheet holding units included in the plurality of sheet holding units, and to print a printing test image and identification information that identifies the sheet holding unit on the transported sheet.

5. 2. The image forming apparatus according to claim 1, wherein the control means controls the printing means to further print third identification information for identifying the image forming apparatus on the first sheet and the second sheet.

6. 2. The image forming apparatus according to claim 1, wherein the control means controls the printing means to further print, on the first sheet and the second sheet, time information indicating a time when the test chart was printed.

7. 2. The image forming apparatus according to claim 1, wherein the control means controls the printing means to further print information indicating whether the test chart is on the front or back of the first sheet and the second sheet.

8. 2. The image forming apparatus according to claim 1, further comprising output control means for controlling so that the first sheet and the second sheet are output to the same sheet output means.

9. 2. The image forming apparatus according to claim 1, wherein the print test image is a grid pattern.

10. The printing process, a control step of transporting a first sheet from a first sheet holding section, and printing a print test image and first identification information that identifies the first sheet holding section on the first sheet based on the fact that the first sheet is a sheet transported from the first sheet holding section, and a control step of transporting a second sheet from a second sheet holding section, and printing a print test image and second identification information that identifies the second sheet holding section on the second sheet based on the fact that the second sheet is a sheet transported from the second sheet holding section.

11. The method further includes a receiving step of receiving an instruction to print a test image, The control method for an image forming apparatus according to claim 10, characterized in that the control process includes controlling the following: based on a single instruction received by the receiving means, to transport the first sheet from the first sheet holding unit, and based on the fact that the first sheet is a sheet transported from the first sheet holding unit, to print the printing test image and the first identification information identifying the first sheet holding unit on the first sheet; and based on the fact that the second sheet is a sheet transported from the second sheet holding unit, to transport the second sheet from the second sheet holding unit, and based on the fact that the second sheet is a sheet transported from the second sheet holding unit, to print the printing test image and the second identification information identifying the second sheet holding unit on the second sheet.

12. The control method for an image forming apparatus according to claim 10, characterized in that the control process includes controlling the printing means to transport a sheet from each of all of the sheet holding units included in the plurality of sheet holding units and to print a printing test image and identification information for identifying the sheet holding unit on the transported sheet.

13. The control method for an image forming apparatus according to claim 10, characterized in that in the printing process, a sheet is transported one by one from each of all of the sheet holding units included in the plurality of sheet holding units, and a printing test image and identification information for identifying the sheet holding unit are printed on the transported sheet.

14. 11. The method according to claim 10, wherein the control step includes controlling so that third identification information for identifying the image forming apparatus is further printed on the first sheet and the second sheet.

15. 11. The method for controlling an image forming apparatus according to claim 10, wherein the control step further comprises controlling so that time information indicating a time when the test chart was printed is further printed on the first sheet and the second sheet.

16. 11. The method according to claim 10, wherein the control step includes controlling so that information indicating whether the test chart is on the front or back is further printed on the first sheet and the second sheet.

17. 11. The method for controlling an image forming apparatus according to claim 10, further comprising an output control step of controlling so that the first sheet and the second sheet are output to the same sheet output means.

18. 2. The method according to claim 1, wherein the test image is a grid pattern.

19. A program for causing a computer to execute the method for controlling an image forming apparatus according to claim 10.

Images