Image forming system, control method of image forming system, and storage medium

Abstract

The invention provides an image forming system, a control method of the image forming system, and a storage medium. An image forming system includes a sheet holding device and an image forming device configured to form an image on a sheet conveyed from a sheet holding unit of the sheet holding device. The sheet holding device includes a display unit. The display unit is configured to issue a notification using a first notification method in a case where an amount of the sheet held in the sheet holding unit decreases to a first amount before execution of the job is completed, and to issue a notification using a second notification method in a case where the amount of the sheet held in the sheet holding unit decreases to a second amount smaller than the first amount before execution of the job is completed. A notification is issued using a second notification method.

Description

Technical Field

[0001] This invention relates to an image forming system, a control method for the image forming system, and a storage medium. Background Technology

[0002] Japanese Patent Application Publication No. 2006-103947 discusses providing multiple light-emitting diodes (LEDs) near the sheet feed cassette. According to this publication, the multiple LEDs serve as an indicator to display the remaining amount of sheet stored in the sheet feed cassette. Specifically, the remaining amount of sheet stored in the sheet feed cassette is displayed by changing the number of LEDs illuminated.

[0003] However, the display unit discussed in Japanese Patent Application Publication No. 2006-103947 only displays the remaining amount of sheet stored in the sheet feed cassette. Therefore, it is difficult for the user issuing the printing command to check whether the sheet feed cassette contains the required amount of sheet for printing. From this perspective, improving the convenience of the image forming apparatus is desirable. Summary of the Invention

[0004] An image forming system according to one aspect of the present invention includes a sheet holding device and an image forming device, the image forming device being configured to form an image on a sheet conveyed from a sheet holding unit of the sheet holding device, wherein the sheet holding device includes a display unit, and wherein the display unit is configured to issue a notification using a first notification method if the amount of sheet held in the sheet holding unit decreases to a first amount before the completion of the operation, and to issue a notification using a second notification method if the amount of sheet held in the sheet holding unit decreases to a second amount less than the first amount before the completion of the operation.

[0005] Other features of the invention will become apparent from the following description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0006] FIG. 1 This is a diagram illustrating an image forming system.

[0007] FIG. 2A This is a diagram illustrating the construction of a digital front-end (DFE). FIG. 2B-1 and FIG. 2B-2 This is a diagram showing the structure of an image forming apparatus.

[0008] FIG. 3A This is a diagram showing the external structure of the feed unit. FIG. 3B This is a diagram showing the external structure of an image forming unit. FIG. 3C This is a diagram showing the external structure of the first fixing unit, the second fixing unit, the cooling unit, and the reversal unit. FIG. 3DThis is a diagram showing the external structure of the discharge unit.

[0009] FIG. 4 This is a diagram showing the internal structure of the entire image forming apparatus.

[0010] FIG. 5 This is a diagram showing the management screen.

[0011] FIG. 6 This is a diagram showing the management screen when the schedule settings section is selected.

[0012] FIG. 7 This is a flowchart illustrating a first example of the processing of an image forming system.

[0013] FIG. 8 This is a diagram showing the first example of the lighting state of the light-emitting unit.

[0014] FIG. 9 This is a flowchart illustrating a second example of the processing of an image forming system.

[0015] FIG. 10 This is a diagram showing a second example of the illuminated state of the light-emitting unit.

[0016] FIG. 11 This is a flowchart illustrating a third example of the processing of an image forming system.

[0017] FIG. 12 This is a diagram showing the third example of the lighting state of the light-emitting unit.

[0018] FIG. 13 This is a flowchart illustrating a fourth example of the processing of an image forming system.

[0019] FIG. 14 This is a diagram showing the fourth example of the illumination state of the light-emitting unit.

[0020] FIG. 15 This is a flowchart illustrating the fifth example of the processing of an image forming system.

[0021] FIG. 16 This is a diagram showing the fifth example of the illumination state of the light-emitting unit. Detailed Implementation

[0022] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0023] First, a first exemplary embodiment will be described.

[0024] FIG. 1This is a block diagram illustrating an example of an image forming system according to this exemplary embodiment. This exemplary embodiment addresses the case where the image forming apparatus 101 is an inkjet printer. The image forming apparatus 101 can also be a non-inkjet printer, such as an electrophotographic printer. The image forming apparatus 101 can also be a printer of the type of multifunction peripheral device, including a reading device such as a scanner. This exemplary embodiment also addresses the case where the information processing apparatus 102 is a personal computer (PC). The information processing apparatus 102 can be a portable information terminal, such as a smartphone or tablet terminal. This exemplary embodiment also addresses the case where the image forming apparatus 101 and the information processing apparatus 102 are connected via a network 100 in a manner capable of communicating with each other. However, communication between the image forming apparatus 101 and the information processing apparatus 102 is not limited to communication via the network 100. Communication between the image forming apparatus 101 and the information processing apparatus 102 can be wired or wireless communication.

[0025] FIG. 1 The image forming system is shown to include an information processing device 102. However, the image forming device 101 and multiple information processing devices can be connected via a network in a manner that enables them to communicate with each other.

[0026] This exemplary embodiment addresses the case where the image forming system includes an image forming apparatus 101 and an information processing apparatus 102. However, the image forming system is not limited to a system including both the image forming apparatus 101 and the information processing apparatus 102. For example, the image forming system may consist only of the image forming apparatus 101. Furthermore, during image forming processes that can be performed solely by the image forming apparatus 101, the information processing apparatus 102 connected to the network 100 need not be included in the image forming system. Examples of image forming processes that can be performed solely by the image forming apparatus 101 include processing for print jobs stored in the image forming apparatus 101.

[0027] First, an example of the information processing device 102 will be described. The information processing device 102 executes various programs, such as applications for submitting print jobs. Furthermore, various applications, such as printer drivers and workflow software, are installed on the information processing device 102. These applications implement functions including converting print data into a printer language supported by the image forming apparatus 101. Users who wish to print issue print commands using these applications. The printer driver and workflow software process the data output from the applications based on the print commands, converting it into print data that the image forming apparatus 101 can interpret, and then sending the print data to the image forming apparatus 101 connected to the network 100.

[0028] There are no particular limitations on the method used to send print data to the image forming apparatus 101. Print data can be sent from the information processing device 102 to the image forming apparatus 101 via a printing application or printer driver. Print data can also be sent from the information processing device 102 to the image forming apparatus 101 via a cloud server.

[0029] Next, an example of the image forming apparatus 101 will be described. The image forming apparatus 101 has a printing function for printing images on sheets. The image forming apparatus 101 also has post-processing functions. Examples of post-processing functions include functions for aligning multiple sheets with printed images, and functions for sorting and discharging multiple sheets with printed images into multiple trays. Examples of sheets include various paper sheets such as plain paper, thick paper, and coated paper. These sheets can also be non-paper sheets such as overhead projector (OHP) film.

[0030] This exemplary embodiment addresses the case where the image forming system further includes a digital front-end (DFE) 103. This exemplary embodiment addresses the case where a display device 104 is communicatively connected to the DFE 103. For example, the display device 104 includes a computer monitor such as a liquid crystal display. The DFE 103 and the display device 104 communicate, for example, via a communication cable. The communication between the DFE 103 and the display device 104 can be wireless. This exemplary embodiment addresses the case where the DFE 103 is communicatively connected to the image forming apparatus 101 via a network 105. This exemplary embodiment addresses the case where the image forming apparatus 101 is connected to the network 100 via the DFE 103. In other words, this exemplary embodiment addresses the case where the image forming apparatus 101 obtains information from the information processing apparatus 102 via the DFE 103. Examples of information from the information processing apparatus 102 include execution instructions for a print job. As described above, this exemplary embodiment addresses the case where the DFE 103 and the image forming apparatus 101 communicate via the network 105. For example, DFE 103 and image forming apparatus 101 send and receive information such as print data, various commands, and status notifications via network 105. Communication between image forming apparatus 101 and DFE 103 is not limited to communication via network 105. Communication between image forming apparatus 101 and DFE 103 can be wired or wireless. The image forming system does not necessarily need to include DFE 103. As described above, for example, the image forming system may consist only of image forming apparatus 101.

[0031] This exemplary embodiment addresses the case where the image forming apparatus 101 includes multiple printing modules. Sheets are conveyed to the multiple printing modules. The multiple printing modules are means for performing a series of processes on the sheets conveyed to the printing modules, including sheet feeding (supply) and discharge. This exemplary embodiment addresses the case where the multiple printing modules are interconnected. The image forming apparatus 101 can use the multiple printing modules to perform complex sheet processing. Examples of the various printing modules constituting the image forming apparatus 101 will now be described. If the sheet is a paper sheet, the feeding can be referred to as paper feeding.

[0032] For example, printer unit 213 uses ink to form (print) an image on a sheet fed from feed unit 214 based on image data, and fixes the image onto the sheet by drying. This exemplary embodiment handles the case where printer unit 213 includes image forming unit 201, first fixing unit 205, second fixing unit 206, cooling unit 207, and reversal unit 208. In this case, image forming unit 201, first fixing unit 205, second fixing unit 206, cooling unit 207, and reversal unit 208 are each examples of printing modules.

[0033] Image forming unit 201 includes, for example, inkjet heads for yellow (Y), magenta (M), cyan (C), and black (K). For example, the inkjet heads are arranged in a straight line along a direction perpendicular to the sheet transport direction. Image forming unit 201 forms an image on the sheet by ejecting droplets from the color inkjet heads onto the sheet being transported below each inkjet head, based on image data. To improve droplet landing performance and fixing performance, an undercoat may be applied to the sheet before ejecting the color ink. This exemplary embodiment addresses the case where image forming processing is performed on each of the colors Y, M, C, and K. However, this is not limiting. For example, in addition to the colors described above, custom-colored inks, called spot colors, may be used. Inks of orange, purple, green, and other colors may be used as additional color inks. Image forming processing may also be performed on these colors.

[0034] The sheet with the panchromatic image thus formed is conveyed to the first fixing unit 205 and the second fixing unit 206. The first fixing unit 205 and the second fixing unit 206 include heat sources such as heaters. The first fixing unit 205 and the second fixing unit 206 fix the ink on the sheet with the image formed onto the sheet by thermally drying the ink. The sheet is then conveyed to the cooling unit 207. The cooling unit 207 cools the heated sheet.

[0035] The sheet cooled by the cooling unit 207 is conveyed to the reversing unit 208. The reversing unit 208 reverses the sheet orientation and conveys the sheet back to the image forming unit 201 to form an image on the back side of the sheet. In cases where an image is formed only on one side of the sheet, the reversing unit 208 does not need to reverse the sheet orientation.

[0036] The feed unit 214 continuously supplies the sheet material on which the image is to be formed to the printer unit 213. FIG. 1 This illustration shows a feed unit 214 comprising three feed units 202 to 204. The discharge unit 215 accumulates the printed material (sheet). FIG. 1 The illustration shows a case where the discharge unit 215 includes three discharge units 209 to 211. Here, the feed units 202 to 204 and the discharge units 209 to 211 are each examples of a printing module.

[0037] The notification device 212 notifies the image forming apparatus 101 of its status by illuminating a light (e.g., a light-emitting diode [LED]). This exemplary embodiment handles the case where the notification device 212 is controlled by the DFE 103 to illuminate the light.

[0038] In the following description, where appropriate, the image forming unit 201, the feeding units 202 to 204, the first fixing unit 205, the second fixing unit 206, the cooling unit 207, the reversal unit 208, and the discharge units 209 to 211 may be collectively referred to as printing modules 201 to 211.

[0039] The printing modules 201 to 211 constituting the image forming apparatus 101 include light-emitting units 201a1 to 211a1, 201a2 to 211a2, 201a3 to 204a3, 202a4 to 204a4, 202a5 to 204a5, and 202a6 to 204a6. For example, the light-emitting units 201a1 to 211a1, 201a2 to 211a2, 201a3 to 204a3, 202a4 to 204a4, 202a5 to 204a5, and 202a6 to 204a6 include LEDs. The light-emitting units 201a1 to 211a1, 201a2 to 211a2, 201a3 to 204a3, 202a4 to 204a4, 202a5 to 204a5, and 202a6 to 204a6 notify the user in a recognizable manner that an event has occurred in the printing modules 201 to 211 where the light-emitting units are deployed. For example, by changing the light-emitting mode, the user can be notified in a recognizable manner that an event has occurred in the printing modules 201 to 211. Examples of light-emitting modes include at least one of the following: presence of illumination, illumination color, illumination intensity (brightness during illumination), illumination time, and on / off pattern. This exemplary embodiment addresses situations where the notification issued by the light-emitting units differs from a notification whose content is changed by altering the shape represented by a combination of on / off states of multiple light-emitting units. Examples of information to be notified include characters, graphics, and symbols. The light-emitting units 201a1 to 211a1, 201a2 to 211a2, and 201a3 to 204a3 can identifiably notify the user of the location and content of events occurring in the printing modules 201 to 211 where the light-emitting units are deployed. Examples of users include the owners and users of the image forming apparatus 101, the information processing apparatus 102, and the DFE 103.

[0040] Three examples will be described as specific examples of notifications made by the light-emitting units 201a1 to 211a1, 201a2 to 211a2, and 201a3 to 204a3.

[0041] First, a first example will be described. Assume that the sheet material being conveyed to the second fixing unit 206 becomes stuck in the second fixing unit 206 (i.e., a paper jam occurs). In this case, for example, the light-emitting units 206a1 or 206a2 included in the second fixing unit 206 illuminate red to notify the user that an event has occurred where printing is difficult to continue due to the sheet material being stuck. Here, for example, both the light-emitting units 206a1 and 206a2 of the second fixing unit 206 may illuminate red.

[0042] Next, a second example will be described. Suppose that during the execution of a print job, the sheet in feed units 202, 203, or 204 runs out, and processing becomes difficult to continue.

[0043] In this scenario, for example, the light-emitting units 202a3, 203a3, or 204a3 of the feed units 202, 203, or 204 may be illuminated in red to notify the user that the feed units 202, 203, or 204 have exhausted their sheet material. Here, all light-emitting units 202a3 to 204a3 of the feed units 202 to 204 may be illuminated in red.

[0044] Next, a third example will be described. Suppose that during a print job, the amount of sheet material stacked in ejection units 209, 210, or 211 reaches a predetermined amount, and no more sheet material can be stacked. In this case, for example, the light-emitting units 209a1, 210a1, or 211a1 of ejection units 209, 210, or 211 illuminate red to notify the user that ejection units 209, 210, or 211 cannot stack sheet material. In this case, all light-emitting units 209a1 to 211a1 of ejection units 209 to 211 can illuminate red.

[0045] Alternatively, a display device 104 or a notification device 212 connected to DFE 103 can be used to notify information equivalent to that notified by the light-emitting units 201a1 to 211a1, 201a2 to 211a2, and 201a3 to 204a3. However, the user needs to determine which of the numerous printing modules constituting the image forming apparatus 101 the event occurred in, and the content of the event in that printing module. Then, the user needs to move to the location where the display device 104 is installed and check the content of the information displayed on the display device 104. Meanwhile, it is difficult for the user to be quickly notified of which of the numerous printing modules the event occurred in by simply lighting the lamp of the notification device 212.

[0046] In contrast, this exemplary embodiment deals with the case where the light-emitting units 201a1 to 211a1, 201a2 to 211a2, and 201a3 to 204a3 are arranged on the printing modules 201 to 211 at a position visible to the user from outside the image forming apparatus 101. An example of a position visible to the user from outside the image forming apparatus 101 is a position on the surface of the printing modules 201 to 211.

[0047] For example, a location visible to a user from the outside of the image forming apparatus 101 could be a location inside the printing modules 201 to 211. In this case, the printing modules 201 to 211 may have holes through which the interior and exterior of the printing modules 201 to 211 communicate. The light-emitting units 201a1 to 211a1, 201a2 to 211a2, and 201a3 to 204a3 can be visually observed by a user from the outside of the image forming apparatus 101 through the holes. This exemplary embodiment addresses the case where all printing modules 201 to 211 of the image forming apparatus 101 are equipped with light-emitting units 201a1 to 211a1, 201a2 to 211a2, and 201a3 to 204a3. However, this is not limiting. For example, one or more printing modules without light-emitting units may exist, as long as at least one printing module is equipped with a light-emitting unit. For example, two or more of all printing modules 201 to 211 of the image forming apparatus 101 may be equipped with light-emitting units. Two or more printing modules can be as many as, or fewer than, all the printing modules of the image forming apparatus 101. The more printing modules equipped with light-emitting units, the more ideal it is.

[0048] The reason is that it can increase the number of printing modules that notify the occurrence of light-emitting unit events.

[0049] This exemplary embodiment addresses the case where light-emitting units 201a1 to 211a1, 201a2 to 211a2, and 201a3 to 204a3 are used to notify of an event. This exemplary embodiment addresses the case where one or more light-emitting units included in a printing module where an event has occurred are selectively illuminated. Therefore, a user can quickly identify a printing module where an event has occurred without approaching the image forming apparatus 101 (light-emitting units). The user can also identify the type of event based on the illuminated color of the light-emitting units. Therefore, light-emitting units 201a1 to 211a1, 201a2 to 211a2, and 201a3 to 204a3 facilitate user understanding of the event. This improves the operability and convenience of the image forming apparatus 101. Specific examples of light-emitting units 202a4 to 204a4, 202a5 to 204a5, and 202a6 to 204a6 will be described below.

[0050] FIG. 2A This is a diagram showing an example of the construction of DFE 103. FIG. 2B-1 and FIG. 2B-2 This is a diagram showing an example of the construction of the image forming apparatus 101. FIG. 2A , FIG. 2B-1 and FIG. 2B-2 The boxes shown are divided into units as part of the system. Therefore, existence does not necessarily correspond to... FIG. 1The shown structure is part of the unit. An example of the internal structure of the DFE 103 and the image forming apparatus 101 will now be described.

[0051] First, an example describing the internal structure of DFE 103 will be given.

[0052] exist FIG. 2A In this configuration, network interface (I / F) 218 ​​is used to communicate with external devices connected to network 100. For example, network I / F 218 receives print job data sent from external devices such as information processing device 102. Network I / F 218 also sends information about the status of image forming apparatus 101 to the external devices. The print job data received by network I / F 218 is processed, for example, by central processing unit (CPU) 217, which reads various programs stored in solid-state drive (SSD) 221 into random access memory (RAM) 220 and executes these programs.

[0053] Therefore, specific examples of the processes to be performed include a series of processes related to print jobs. For example, this series of print job-related processes includes loading print job data, raster image processor (RIP) processing, image conversion processing, and color conversion processing. DFE 103 includes an operation unit 222. Various settings, job settings, and adjustment commands for the image forming apparatus 101 of DFE 103 are indicated and executed by the user via the operation unit 222. CPU 217 and various modules are connected to each other via system bus 223.

[0054] In addition to or in lieu of CPU 217, the processing of CPU 217 can be performed by one or more processors (e.g., graphics processing unit [GPU]) different from CPU 217. Multiple hardware components can share processing to implement the processing of CPU 217. At least a portion of the processing of CPU 217 can be performed using dedicated hardware. Examples of dedicated hardware include application-specific integrated circuits (ASICs) and field-programmable gate arrays (FPGAs). The processor is not limited to a specific one (such as a CPU), multiple hardware components share processing, and dedicated hardware can also be used in devices other than DFE 103.

[0055] Print job data processed by DFE 103 is sent to image forming apparatus 101 via network I / F 218 and network 105.

[0056] Next, an example of the internal structure of the image forming apparatus 101 will be described.

[0057] Network I / F 225 is used to communicate with external devices connected to network 105. For example, network I / F 225 is connected to network I / F 219 of DFE 103 via network 105 in a manner that enables mutual communication. In this case, for example, network I / F 225 receives print job data from DFE 103. Network I / F 225 is also used to send / receive status and commands to / from DFE 103.

[0058] CPU 224 is a unit that manages the overall operation of image forming apparatus 101. This exemplary embodiment deals with the case where CPU 224 controls modules of image forming apparatus 101 (including printing modules 201 to 211). These modules are connected to CPU 224 via system buses 228a and 228b in a manner that enables them to communicate with each other.

[0059] CPU 224 performs various types of processing by reading various programs stored in SSD 230 into RAM 229 and executing these programs.

[0060] This exemplary embodiment addresses the case where the DFE 103 and the image forming apparatus 101 each include their own separate CPUs 217 and 224. However, this is not limiting. For example, the DFE 103 and the image forming apparatus 101 may be controlled by the same CPU.

[0061] The sheet management unit 226 is a database constituting the sheet library of the image forming apparatus 101. The sheet management unit 226 stores parameters for various types of sheets. The adjustment unit 227 includes various sensors. The adjustment unit 227 performs various calibrations and controls the various sensors. This exemplary embodiment addresses the situation where, in addition to these modules, printing modules 201 to 211 are communicatively connected to the CPU 224 via system buses 228a and 228b.

[0062] As described above, this exemplary embodiment processes the image forming apparatus 101 as a printing module, which includes an image forming unit 201, feed units 202 to 204, a first fixing unit 205, a second fixing unit 206, a cooling unit 207, a reversal unit 208, and discharge units 209 to 211. An example of the internal structure of the printing module will now be described.

[0063] First, an example describing the internal structure of the cooling unit 207 will be given.

[0064] The microprocessor 207b controls the sub-modules included in the cooling unit 207 and exchanges control commands and status notifications with the CPU 224.

[0065] Conveying units 207c1 and 207c2 are sheet material conveying units. Conveying units 207c1 and 207c2 convey sheets via upper and lower conveying paths, respectively. The conveying process of conveying units 207c1 and 207c2 is controlled by microprocessor 207b. Channel sensors 207d1 and 207d2 are sensors respectively installed in the downstream portions (outlet portions) of conveying units 207c1 and 207c2. Channel sensors 207d1 and 207d2 are used to detect the presence of sheets in the downstream portions of conveying units 207c1 and 207c2. Channel sensors 207d1 and 207d2 are mainly used for detecting sheet material retention occurring in conveying units 207c1 and 207c2 within the cooling unit 207.

[0066] Light-emitting units 207a1 and 207a2 are designed to notify the location and content of events occurring in the cooling unit 207. For example, light-emitting units 207a1 and 207a2 include LEDs. This exemplary embodiment deals with the use of the position and color of the illuminated light-emitting units 207a1 and 207a2 to notify the location and content of events occurring in the cooling unit 207. Reference will be made below. FIG. 3C This provides a detailed example describing which light-emitting unit illuminates in which color when an event occurs. As described above, the location and content of an event can be communicated using methods other than the position and color of the illuminated light-emitting units 207a1 and 207a2, such as illumination time, illumination intensity, and on / off patterns. The methods used to communicate the location and content of an event are not limited and can also be applied to light-emitting units included in the printing module, excluding the cooling unit 207.

[0067] Next, an example of the internal structure of the first fixing unit 205 will be described.

[0068] The microprocessor 205b controls the sub-modules included in the first fixing unit 205 and exchanges control commands and status notifications with the CPU 224. Conveyor units 205c1 and 205c2 are sheet conveying units. Conveyor units 205c1 and 205c2 convey sheet material via upper and lower conveying paths, respectively. The conveying process of conveyor units 205c1 and 205c2 is controlled by the microprocessor 205b. Channel sensors 205d1 and 205d2 are sensors respectively installed in the downstream portions (exit portions) of conveyor units 205c1 and 205c2. Channel sensors 205d1 and 205d2 are used to detect the presence of sheet material in the downstream portions of conveyor units 205c1 and 205c2. Channel sensors 205d1 and 205d2 are mainly used for detecting sheet material retention occurring in conveyor units 205c1 and 205c2 within the first fixing unit 205.

[0069] The light-emitting units 205a1 and 205a2 are designed to notify the location and content of an event occurring in the first fixing unit 205. For example, the light-emitting units 205a1 and 205a2 include LEDs. This exemplary embodiment deals with the case where the position and color of the illuminated light-emitting units 205a1 and 205a2 are used to notify the location and content of an event occurring in the first fixing unit 205. Reference will be made below. FIG. 3C Describe in detail which light-emitting unit lights up in which color when what event occurs.

[0070] Next, an example of the internal structure of the second fixing unit 206 will be described.

[0071] The microprocessor 206b controls the sub-modules included in the second fixing unit 206 and exchanges control commands and status notifications with the CPU 224. Conveyor units 206c1 and 206c2 are sheet conveying units. Conveyor units 206c1 and 206c2 convey sheet material via upper and lower conveying paths, respectively. The conveying process of conveyor units 206c1 and 206c2 is controlled by the microprocessor 206b. Channel sensors 206d, 206d21, and 202d22 are sensors respectively installed in the downstream portions (exit portions) of conveyor units 206c1 and 206c2. Channel sensors 206d1, 206d21, and 206d22 are sensors used to detect the presence of sheet material in the downstream portions of conveyor units 206c1 and 206c2. Channel sensors 206d1, 206d21 and 206d22 are mainly used for detecting and processing sheet retention that occurs in the transport units 206c1 and 206c2 within the second fixing unit 206.

[0072] Light-emitting units 206a1 and 206a2 are designed to notify the location and content of an event occurring in the second fixing unit 206. For example, light-emitting units 206a1 and 206a2 include LEDs. This exemplary embodiment deals with the use of the position and color of the illuminated light-emitting units 206a1 and 206a2 to notify the location and content of an event occurring in the second fixing unit 206. Reference will be made below. FIG. 3C Describe in detail which light-emitting unit lights up in which color when what event occurs.

[0073] Next, an example of the internal structure of the image forming unit 201 will be described.

[0074] The microprocessor 201b controls the sub-modules included in the image forming unit 201 and exchanges control commands and status notifications with the CPU 224. Conveying units 201c1 and 201c2 are sheet conveying units. Conveying units 201c1 and 201c2 convey sheets via upper and lower conveying paths, respectively. The conveying process of conveying units 201c1 and 201c2 is controlled by the microprocessor 201b. Channel sensors 201d1 and 201d2 are sensors respectively installed in the downstream portions (exit portions) of conveying units 201c1 and 201c2. Channel sensors 201d1 and 201d2 are sensors used to detect the presence of sheets in the downstream portions of conveying units 201c1 and 201c2.

[0075] The light-emitting units 201a1 to 201a3 are designed to notify the location and content of events occurring in the image forming unit 201. For example, the light-emitting units 201a1 to 201a3 include LEDs. This exemplary embodiment processes the use of the position and color of the illuminated light-emitting units 201a1 to 201a3 to notify the location and content of events occurring in the image forming unit 201. Reference will be made below. FIG. 3B Describe in detail which light-emitting unit lights up in which color when what event occurs.

[0076] Next, an example of the internal structure of the feed units 202 to 204 will be described. This exemplary embodiment deals with an example where the feed units 202 to 204 are examples of feed units that store and feed sheet material.

[0077] This exemplary embodiment deals with examples where feed segments 202e1 to 202e3, 203e1 to 203e3, and 204e1 to 204e3 are examples of supply segments. The exemplary embodiment deals with examples where feed units 202 to 204 have the same internal structure. Therefore, only an example of the internal structure of feed unit 202 will be described, and detailed descriptions of feed units 203 and 204 will be omitted. At least one of feed units 202 to 204 may have different internal structures.

[0078] The microprocessor 202b controls the sub-modules included in the feed unit 202 and exchanges control commands and status notifications with the CPU 224. Conveyor units 202c1 and 202c2 are sheet material conveying units. Conveyor units 202c1 and 202c2 convey sheet material via upper and lower conveyor paths, respectively. The conveying process of conveyor units 202c1 and 202c2 is controlled by the microprocessor 202b. Channel sensors 202d1 and 202d2 are sensors respectively installed in the downstream portions (exit portions) of conveyor units 202c1 and 202c2. Channel sensors 202d1 and 202d2 are used to detect the presence of sheet material in the downstream portions of conveyor units 202c1 and 202c2. Channel sensors 202d1 and 202d2 are mainly used for detecting sheet material retention occurring in conveyor units 202c1 and 202c2 within the feed unit 202.

[0079] Remaining quantity detection sensors 202d3, 202d4, and 202d5 are sensors disposed at feed sections 202e1, 202e2, and 202e3 included in the feed unit 202. These sensors are used to measure the remaining quantity of sheets stored (stacked) in feed sections 202e1, 202e2, and 202e3, respectively. This exemplary embodiment handles the case where remaining quantity detection sensors 202d3, 202d4, and 202d5 are attached to the bottom of feed sections 202e1, 202e2, and 202e3, respectively. As the remaining quantity of sheets stored in feed sections 202e1 to 202e3 changes, trays within these sections move upward or downward. For example, the remaining sheet quantity detection sensors 202d3 to 202d5 can measure the remaining amount of sheet material stored in the tray by detecting the vertical movement of the tray. The remaining sheet quantity detection sensors 202d3 to 202d5 are mainly used for displaying and processing the remaining amount of sheet material stored in the feed sections 202e1 to 202e3, as well as calculating the paper exhaustion time for printing jobs in progress and standby. The remaining sheet quantity notification units 202g1, 202g2, and 202g3 respectively issue notifications regarding the remaining amount of sheet material stored in the feed sections 202e1, 202e2, and 202e3 of the feed unit 202. The following will refer to... FIG. 3A Specific examples of remaining quantity notification units 202g1 to 202g3 are described.

[0080] Light-emitting units 202a1 to 202a3 are designed to notify the location and content of events occurring in the feed unit 202. For example, light-emitting units 202a1 to 202a3 include LEDs. This exemplary embodiment processes the use of the illuminated light-emitting units 202a1 to 202a3 to notify the location and content of events occurring in the feed unit 202 using the position and color of the illuminated light-emitting units 202a1 to 202a3. Light-emitting units 202a4 to 202a6 are designed to notify various states of feed segments 202e1 to 202e3. For example, light-emitting units 202a4 to 202a6 include LEDs. Reference will be made below. FIG. 3A This embodiment describes in detail which light-emitting unit illuminates in which color when an event occurs. In this exemplary embodiment, the light-emitting units including light-emitting units 202a1 to 202a6 are described as illuminating in a specific color, while the illumination color of all light-emitting units can be variable and can be any color. This exemplary embodiment addresses an example where the first light-emitting unit is implemented by light-emitting units 202a3, 203a3, and 204a3. This exemplary embodiment also addresses an example where the second light-emitting unit is implemented by light-emitting units 202a4 to 202a6, 203a4 to 203a6, and 204a4 to 204a6. This exemplary embodiment addresses an example where the notification unit is implemented by remaining quantity notification units 202g1 to 202g3.

[0081] Next, an example of the internal structure of the inversion unit 208 will be described.

[0082] The microprocessor 208b controls the sub-modules included in the reversal unit 208 and exchanges control commands and status notifications with the CPU 224. Conveyor units 208c1 and 208c2 are sheet material conveying units. Conveyor units 208c1 and 208c2 convey sheet material via upper and lower conveyor paths, respectively. The conveying process of conveyor units 208c1 and 208c2 is controlled by the microprocessor 208b. Channel sensors 208d1 and 208d2, as examples of detection units, are sensors respectively disposed in the downstream portions (exit portions) of conveyor units 208c1 and 208c2. Channel sensors 208d1 and 208d2 are used to detect the presence of sheet material in the downstream portions of conveyor units 208c1 and 208c2. Channel sensors 208d1 and 208d2 are mainly used for detecting sheet material retention occurring in conveyor units 208c1 and 208c2 within the reversal unit 208.

[0083] The light-emitting units 208a1 and 208a2 are designed to notify the location and content of an event occurring in the inversion unit 208. For example, the light-emitting units 208a1 and 208a2 include LEDs. This exemplary embodiment deals with the use of the position and color of the illuminated light-emitting units 208a1 and 208a2 to notify the location and content of an event occurring in the inversion unit 208. Reference will be made below. FIG. 3C Describe in detail which light-emitting unit lights up in which color when what event occurs.

[0084] Next, examples of the internal structures of the discharge units 209 to 211 will be described. This exemplary embodiment deals with the case where discharge units 209 to 211 have the same internal structure. Therefore, only an example of the internal structure of discharge unit 209 will be described, and detailed descriptions of discharge units 210 and 211 will be omitted. At least one of the discharge units 209 to 211 may have different internal structures.

[0085] The microprocessor 209b controls the sub-modules included in the discharge unit 209 and exchanges control commands and status notifications with the CPU 224. Conveying units 209c1 and 209c2 are sheet material conveying units. Conveying units 209c1 and 209c2 convey sheets via upper and lower conveying paths, respectively. The conveying process of conveying units 209c1 and 209c2 is controlled by the microprocessor 209b. Channel sensors 209d1 and 209d2 are sensors respectively installed downstream of conveying units 209c1 and 209c2. Channel sensors 209d1 and 209d2 are used to detect the presence of sheets downstream of conveying units 209c1 and 209c2. Channel sensors 209d1 and 209d2 are mainly used for detecting sheet material retention occurring in conveying units 209c1 and 209c2 within the discharge unit 209.

[0086] Light-emitting units 209a1 and 209a2 are designed to notify the location and content of an event occurring in the discharge unit 209. For example, light-emitting units 209a1 and 209a2 include LEDs. This exemplary embodiment deals with the case where the position and color of the illuminated light-emitting units 209a1 and 209a2 are used to notify the location and content of an event occurring in the discharge unit 209. Reference will be made below. FIG. 3D Describe in detail which light-emitting unit lights up in which color when what event occurs.

[0087] FIG. 3AThis is a diagram illustrating an example of the external structure of feed unit 202. This exemplary embodiment deals with the case where feed units 202 to 204 have the same external structure. Therefore, only an example of the external structure of feed unit 202 will be described, and detailed descriptions of feed units 203 and 204 will be omitted. At least one of feed units 202 to 204 may have a different external structure.

[0088] FIG. 3A The diagram illustrates a feed unit 202 comprising three feed sections 202e1 to 202e3. Feed sections 202e1 to 202e3 can store sheets of different types and sizes. Feed sections 202e1, 202e2, and 202e3 each include open instruction units 202f1, 202f2, and 202f3, and remaining quantity notification units 202g1, 202g2, and 202g3. Feed sections 202e1, 202e2, and 202e3 also include light-emitting units 202a4, 202a5, and 202a6, respectively. Light-emitting units 202a4, 202a5, and 202a6 respectively notify feed sections 202e1, 202e2, and 202e3 of various states. When the open instruction units 202f1, 202f2, and 202f3 are operated, the trays of feed sections 202e1, 202e2, and 202e3 are respectively extracted from the feed unit 202. The remaining quantity notification units 202g1, 202g2, and 202g3 respectively notify the remaining quantity of the sheet stored in feed sections 202e1, 202e2, and 202e3. For example, the remaining quantity notification units 202g1 to 202g3 sequentially notify the remaining quantity of the sheet stored in feed sections 202e1 to 202e3. This exemplary embodiment handles the case where each of the remaining quantity notification units 202g1 to 202g3 includes multiple LEDs. The remaining quantity notification units 202g1, 202g2, and 202g3 change the number of LEDs to be lit from the multiple LEDs based on the remaining quantity of the sheet stored in feed sections 202e1, 202e2, and 202e3. In this case, the length of the illuminated area will vary depending on the combination of LEDs being on and off.

[0089] Users can identify the remaining amount of sheet material based on its length. As described above, this exemplary embodiment also addresses the case where the notification emitted by the light-emitting units 202a1 to 202a6 differs from those notifications that use information based on a variable shape represented by a combination of on / off states of the light-emitting units to identify the notification content. Therefore, this exemplary embodiment addresses the case where the notification mode using the light-emitting units 202a1 to 202a6 differs from the notification mode using the light-emitting units 202g1, 202g2, and 202g3.

[0090] This exemplary embodiment handles the case where light-emitting units 202a4, 202a5, and 202a6 are illuminated in green when feed sections 202e1, 202e2, and 202e3 are currently feeding sheet material, respectively. This exemplary embodiment also handles the case where light-emitting units 202a4, 202a5, and 202a6 are illuminated in red when errors occur in feed sections 202e1, 202e2, and 202e3, respectively. Examples of error conditions include sheet overload and malfunction of the opening instruction units 202f1 to 202f3.

[0091] The escape tray 202g is a tray to which sheets that may end due to folding or multi-feeding are discharged, so that these sheets are not conveyed to the image forming unit 201.

[0092] although FIG. 3A Not shown, but the feed unit 202 includes the remaining quantity detection sensors 202d3 to 202d5 as described above.

[0093] This exemplary embodiment addresses the case where the feed unit 202 includes three light-emitting units 202a1 to 202a3. This exemplary embodiment addresses the case where the three light-emitting units 202a1 to 202a3 are located within the feed unit 202 at positions different from those of the feed sections 202e1 to 202e3. This exemplary embodiment addresses the case where the light-emitting unit 202a1 is positioned on the front surface of the feed unit 202, above the light-emitting unit 202a2. This exemplary embodiment addresses the case where the lower light-emitting unit 202a2 of the feed unit 202 is illuminated red when the sheet material is held in the lower conveying unit 202c2 within the feed unit 202. This exemplary embodiment addresses the case where the upper light-emitting unit 202a1 of the feed unit 202 is illuminated red when the sheet material is held in the upper conveying unit 202c1 within the feed unit 202. This exemplary embodiment addresses the case where the light-emitting unit 201a1 indicates a state of the feed unit 202 different from the state of the sheet material being held. Specifically, this exemplary embodiment addresses the case where the light-emitting unit 202a1 illuminates in red when the overflow tray 202g is filled with the discharged sheet (tray full state). This exemplary embodiment addresses the case where the light-emitting unit 201a1 illuminates in yellow when the overflow tray 202g is close to being full.

[0094] When the overflow tray 202g is filled with the discharged sheet (tray full state), for example, the light-emitting unit 202a1 can be lit up in a color other than red or yellow.

[0095] This exemplary embodiment processes the light-emitting unit 202a3 of the feed unit 202 to notify the remaining amount of sheet material stored in the feed sections 202e1 to 202e3 that is set up for printing jobs in progress and in standby. For example, the microprocessor 202b calculates the amount of sheet material stored in the feed sections 202e1 to 202e3 that is set up for printing jobs in progress. The amount of sheet material stored in the sheet material feed sections 202e1 to 202e3 that is set up for printing jobs in progress refers to the remaining amount of sheet material set up for printing jobs in the feed sections 202e1-202e3. The microprocessor 202b compares the remaining amount of sheet material set up for printing jobs in the feed sections 202e1 to 202e3 with the amount of sheet material set up for printing jobs but not yet used. The amount of sheet material set up for printing jobs but not yet used refers to the remaining amount of sheet material planned to be printed in the printing job.

[0096] If microprocessor 202b determines, based on the comparison results, that there will be a sheet shortage before the print job is completed, microprocessor 202b illuminates the light-emitting unit 202a3 in yellow. If microprocessor 202b determines that the sheet is actually exhausted, microprocessor 202b illuminates the light-emitting unit 202a3 in red. If any of the sheet feed segments 202e1 to 202e3 encounters an error, microprocessor 202 illuminates the light-emitting unit 202a3 in red. Examples of error conditions include sheet overload and malfunction of the open instruction units 202f1 to 202f3.

[0097] In addition to processing a print job, or as an alternative to processing a print job, when the image forming apparatus 101 is in standby mode to perform a print job, the microprocessor 202b can perform the above comparison and illuminate the light-emitting unit 202a3 based on the comparison result.

[0098] The illumination color of the light-emitting unit 202a3 is not limited to yellow or red. As described above, examples of illumination patterns include at least one of the following: presence of illumination, illumination color, illumination intensity, illumination time, and illumination / off pattern. The display based on the states of feed sections 202e1 to 202e3 can be provided by changing at least one of these states. In the above example, the states of feed sections 202e1 to 202e3 include a state where the sheet will be short before the print job is completed, a state where the sheet is actually exhausted, and a state where an error occurs in any of feed sections 202e1 to 202e3.

[0099] FIG. 3B This is a diagram showing an example of the external structure of the image forming unit 201.

[0100] As described above, the notification device 212 notifies the image forming apparatus 101 of its status by turning on a light.

[0101] The image forming unit 201 includes a head unit 201e. For example, the head unit 201e includes an inkjet head and a control unit for the inkjet head. The ink tank control unit 201f performs ink replenishment and waste ink replacement, and displays the remaining ink level.

[0102] This exemplary embodiment addresses the case where the light-emitting units 201a1 and 201a2 are illuminated in red when the sheet remains in the upper transport unit 201c1 within the image forming unit 201. This exemplary embodiment also addresses the case where the lower light-emitting unit 201a3 is illuminated in red when the sheet remains in the lower transport unit 201c2 within the image forming unit 201.

[0103] FIG. 3C This is a diagram illustrating an example of the external structure of the first fixing unit 205, the second fixing unit 206, the cooling unit 207, and the reversal unit 208. This exemplary embodiment addresses the case where the reversal unit 208 includes an escape tray 208e. When an error occurs in the image forming apparatus 101, the sheet in the transport path within the image forming apparatus 101 is discharged into the escape tray 208e.

[0104] The first fixing unit 205 and the second fixing unit 206 heat the sheet using a heater for drying. Therefore, this exemplary embodiment addresses the situation where covers 205e and 206e are respectively disposed on top of the first fixing unit 205 and the second fixing unit 206 to prevent the user from accidentally touching the heating portions of the first fixing unit 205 and the third fixing unit 206.

[0105] This exemplary embodiment addresses the case where the light-emitting unit 205a1 is disposed on the front surface of the first fixing unit 205, above the light-emitting unit 205a2. This exemplary embodiment addresses the case where, when the sheet is held in the upper conveying unit 205c1 within the first fixing unit 205, the upper light-emitting unit 205a1 of the first fixing unit 205a is illuminated in red. This exemplary embodiment addresses the case where, when the sheet is held in the lower conveying unit 205c2 within the first fixing unit 205, the lower light-emitting unit 205a2 of the first fixing unit 205 is illuminated in red.

[0106] This exemplary embodiment addresses the case where the light-emitting unit 206a1 is disposed on the front surface of the second fixing unit 206, above the light-emitting unit 206a2. This exemplary embodiment addresses the case where, when the sheet is held in the upper conveying unit 206c1 within the second fixing unit 206, the upper light-emitting unit 206a1 of the second fixing unit 206 is illuminated in red. This exemplary embodiment addresses the case where, when the sheet is held in the lower conveying unit 206c2 within the second fixing unit 206, the lower light-emitting unit 206a2 of the second fixing unit 206 is illuminated in red.

[0107] This exemplary embodiment addresses the case where the light-emitting unit 207a1 is disposed on the front surface of the cooling unit 207, above the light-emitting unit 207a2. This exemplary embodiment addresses the case where, when the sheet is held in the upper conveying unit 207c1 within the cooling unit 207, the upper light-emitting unit 207a1 of the cooling unit 207 is illuminated in red. This exemplary embodiment addresses the case where, when the sheet is held in the lower conveying unit 207c2 within the cooling unit 207, the lower light-emitting unit 207a2 of the cooling unit 207 is illuminated in red.

[0108] This exemplary embodiment addresses the case where the light-emitting unit 208a1 is disposed on the front surface of the reversing unit 208, above the light-emitting unit 208a2. This exemplary embodiment addresses the case where, when the sheet material is held in the upper conveying unit 208c1 within the reversing unit 208, the upper light-emitting unit 208a1 of the reversing unit 208 is illuminated in red. This exemplary embodiment addresses the case where, when the sheet material is held in the lower conveying unit 208c2 within the reversing unit 208, the lower light-emitting unit 208a2 of the reversing unit 208 is illuminated in red.

[0109] FIG. 3D This is a diagram illustrating an example of the external structure of the discharge unit 209. This exemplary embodiment deals with the case where discharge units 209 to 211 have the same external structure. Therefore, only an example of the external structure of discharge unit 209 will be described, and detailed descriptions of discharge units 210 and 211 will be omitted. At least one of discharge units 209 to 211 may have a different external structure.

[0110] This exemplary embodiment addresses the case where the discharge unit 209 has two discharge locations. The stacking unit 209e is a component for stacking a large number of sheets. The stacking unit 209e is protected by a door 209f. A small amount of sheet is discharged into the sample tray 209g. The sample tray 209g is not protected by a door. This exemplary embodiment addresses the case where the stacking unit 209e includes a micro-motion mechanism (not shown) for aligning the sheets to improve the sheet stacking capability in the stacking unit 209d. FIG. 1As shown, when the image forming apparatus 101 includes a plurality of discharge units 209 to 211, each of the plurality of discharge units 209 to 211 may each include a stacking unit. This exemplary embodiment deals with a case where the image forming apparatus 101 has a function (tray linking function) capable of processing a plurality of stacking units as a single discharge destination.

[0111] The user operates the pop-up command unit 209h to unlock the door 209f. With the door 209f unlocked, the user can enter the stacking unit 209e within the discharge unit 209. The user can then remove the sheets stacked within the discharge unit 209. The stacking amount notification unit 209i progressively displays the amount (height) of the sheets stacked in the stacking unit 209e based on the stacking amount.

[0112] This exemplary embodiment addresses the case where the light-emitting unit 209a1 is disposed on the front surface of the discharge unit 209, above the light-emitting unit 209a2. This exemplary embodiment addresses the case where the upper light-emitting unit 209a1 of the discharge unit 209 is illuminated in red when the sheet material is retained in the upper conveying unit 209c1 within the discharge unit 209. This exemplary embodiment also addresses the case where the upper light-emitting unit 209a1 is illuminated in red when the sample tray 209g of the discharge unit 209 is full of sheet material. This exemplary embodiment addresses the case where the upper light-emitting unit 209a1 of the discharge unit 209 is illuminated in yellow when the sample tray 209g of the discharge unit 209 is nearly full of sheet material. For example, when the sample tray 209g of the discharge unit 209 is full of sheet material, the light-emitting unit 209a1 may be illuminated in a color other than red or yellow.

[0113] This exemplary embodiment addresses the case where the lower light-emitting unit 209a2 of the discharge unit 209 is illuminated in red when the sheet material is retained in the lower conveying unit 209c within the discharge unit 209. This exemplary embodiment also addresses the case where the lower light-emitting unit 209a2 in the discharge unit 209 is illuminated in red when the stacking unit 209e of the discharge unit 209 is full of sheet material. This exemplary embodiment also addresses the case where the lower light-emitting unit 209a2 in the discharge unit 209 is illuminated in yellow when the stacking unit 209e of the discharge unit 209 is nearly full of sheet material. For example, when the stacking unit 209e of the discharge unit 209 is full of sheet material, the light-emitting unit 209a2 may be illuminated in a color other than red or yellow.

[0114] FIG. 4 This is a diagram illustrating an example of the internal structure of the entire image forming apparatus 101. (Refer to...) FIG. 4This exemplary embodiment describes an example of the structure of the sheet transport path in the printing module included in the image forming apparatus 101, an example of the positional relationship between the channel sensors, and an example of the layout of the light-emitting units. As described above, this exemplary embodiment addresses the case where the feed units 202 to 204 have the same structure. This exemplary embodiment also addresses the case where the discharge units 209 to 211 have the same structure. Therefore, FIG. 4 Only feed units 202 to 204 and discharge units 209 to 211 are shown, and feed units 203 and 204 and discharge units 210 and 211 are omitted from the figure. Detailed descriptions of feed units 203 and 204 and discharge units 210 and 211 will also be omitted here.

[0115] First, the feed unit 202 will be described. This exemplary embodiment processes the transfer units 202c1 and 202c2 located in... FIG. 4 The situation is illustrated in the diagram. Channel sensors 202d1 and 202d2 are located downstream of conveying units 202c1 and 202c2, respectively. Channel sensors 202d1 and 202d2 detect that the sheet material conveyed by conveying units 202c1 and 202c2 passes through the detection areas of channel sensors 202d1 and 202d2. According to this exemplary embodiment, channel sensors 202d1 and 202d2 are used to detect the occurrence of sheet material retention.

[0116] For example, sheet retention can be detected using the following methods.

[0117] The microprocessors included in the various printing modules, such as the feed unit 202, control the transfer units of the printing modules, including the microprocessors, based on instructions from the CPU 224. This transfers the sheet material. As the sheet material is thus transferred to the printing module, it is controlled by the transfer units of the printing module to move through the printing module and then transferred out of the printing module.

[0118] In doing so, the time between the sheet being conveyed into the printing module and the sheet being conveyed out of the printing module is calculated based on the relationship between the sheet's conveying speed and the shape and length of the conveying path within the printing module. This time is calculated, for example, by the CPU 224. This time is the expected time the sheet will remain in the printing module. In the following description, this time will be referred to as the expected in-module time, where appropriate. If the sheet is detected by a channel sensor after the expected in-module time has elapsed, the CPU 224 can determine that the conveying process in the printing module is proceeding as expected. On the other hand, if no channel sensor detects the sheet despite the expected in-module time having elapsed, the CPU 224 can determine that the sheet has not been correctly conveyed in the printing module. In other words, the CPU 224 can determine that the conveying process in the printing module has stalled due to the sheet remaining in the printing module. This exemplary embodiment then addresses the case where the channel sensor is located downstream of the conveying path in each printing module. This exemplary embodiment handles the following situation: Based on the detection results of the channel sensor, the CPU 224 determines whether the sheet has been transferred out of each printing module at the time point when the expected time of the sheet in the printing module has passed.

[0119] This exemplary embodiment processes the CPU 224 to determine whether the sheet is stuck in the lower conveying unit 202c2 based on the detection result of the channel sensor 202d2.

[0120] This exemplary embodiment handles the case where, if the sheet is retained in the lower conveying unit 202c2, the CPU 224 illuminates the lower light-emitting unit 202a2 in red. This indicates that the sheet is retained in the lower conveying unit 202c2. This exemplary embodiment also handles the case where the CPU 224 determines whether the sheet is retained in the upper conveying unit 202c1 based on the detection result of the channel sensor 202d1. This exemplary embodiment handles the case where, if the sheet is retained in the upper conveying unit 202c1, the CPU 224 illuminates the upper light-emitting unit 202a1 in red. This indicates that the sheet is retained in the upper conveying unit 202c1.

[0121] Next, the image forming unit 201 will be described. In this exemplary embodiment, the processing and transmission units 201c1 and 201c2 are located... FIG. 4The situation is as shown in the diagram. Channel sensors 201d1 and 201d2 are located downstream of conveying units 201c1 and 201c2, respectively. This exemplary embodiment processes the case where the CPU 224 determines, based on the detection result of channel sensor 201d1, whether the sheet is stuck in the downstream portion of the upper conveying unit 201c1. This exemplary embodiment processes the case where, if the sheet is stuck in the downstream portion of the upper conveying unit 201c1, the CPU 224 illuminates the upper light-emitting units 201a1 and 201a2 in red. This indicates that the sheet is stuck in the downstream portion of the upper conveying unit 201c1.

[0122] This exemplary embodiment handles the case where the CPU 224 determines whether the sheet is stuck in the downstream portion of the lower conveying unit 201c2 based on the detection result of the channel sensor 201d2. This exemplary embodiment handles the case where, if the sheet is stuck in the downstream portion of the lower conveying unit 201c2, the CPU 224 illuminates the lower light-emitting unit 201a3 in red. This indicates that the sheet is stuck in the lower conveying unit 201c2. Examples of methods for detecting sheet sticking are the same as described above, therefore a detailed description of methods for detecting sheet sticking will be omitted here.

[0123] Next, the first fixing unit 205 will be described. In this exemplary embodiment, the processing and transmission units 205c1 and 205c2 are located in... FIG. 4 The situation is as shown in the diagram. Channel sensors 205d1 and 205d2 are located downstream of conveying units 205c1 and 205c2, respectively. In this exemplary embodiment, the CPU 224 determines whether the sheet material is stuck in the downstream portion of the upper conveying unit 205c1 based on the detection result of channel sensor 205d1. In this exemplary embodiment, if the sheet material is stuck in the downstream portion of the upper conveying unit 205c1, the CPU 224 illuminates the upper light-emitting unit 205a1 in red. This indicates that the sheet material is stuck in the downstream portion of the upper conveying unit 205c1.

[0124] This exemplary embodiment handles the case where the CPU 224 determines whether the sheet is stuck in the downstream portion of the lower conveying unit 205c2 based on the detection result of the channel sensor 205d2. This exemplary embodiment handles the case where, if the sheet is stuck in the downstream portion of the lower conveying unit 205c2, the CPU 224 illuminates the lower light-emitting unit 205a2 in red. This indicates that the sheet is stuck in the lower conveying unit 205c2. Examples of methods for detecting sheet sticking are the same as described above, therefore a detailed description of methods for detecting sheet sticking will be omitted here.

[0125] Next, the second fixing unit 206 will be described. This exemplary embodiment processes the transmission units 206c1 and 206c2 located in... FIG. 4The situation is as shown in the diagram. Channel sensors 206d1, 206d21, and 206d22 are located downstream of conveying units 206c1 and 206c2, respectively. This exemplary embodiment processes the CPU 224 to determine whether the sheet material is stuck in the downstream portion of the upper conveying unit 206c1 based on the detection result of channel sensor 206d1. This exemplary embodiment processes the case where, if the sheet material is stuck in the downstream portion of the upper conveying unit 206c1, the CPU 224 illuminates the upper light-emitting unit 206a1 in red. This indicates that the sheet material is stuck in the downstream portion of the upper conveying unit 206c1.

[0126] This exemplary embodiment handles the case where the CPU 224 determines whether the sheet is stuck in the downstream portion of the lower conveying unit 206c2 based on the detection results of channel sensors 206d21 and 206d22. This exemplary embodiment handles the case where, if the sheet is stuck in the downstream portion of the lower conveying unit 206c2, the CPU 224 illuminates the lower light-emitting unit 206a2 in red. This indicates that the sheet is stuck in the lower conveying unit 206c2. Examples of methods for detecting sheet sticking are the same as described above, therefore a detailed description of methods for detecting sheet sticking will be omitted here.

[0127] Next, the cooling unit 207 will be described. In this exemplary embodiment, the processing and conveying units 207c1 and 207c2 are located... FIG. 4 The situation is as shown in the diagram. Channel sensors 207d1 and 207d2 are located downstream of conveying units 207c1 and 207c2, respectively. In this exemplary embodiment, the CPU 224 determines whether the sheet material is stuck downstream of the upper conveying unit 207c1 based on the detection result of channel sensor 207d1. In this exemplary embodiment, if the sheet material is stuck downstream of the upper conveying unit 207c1, the CPU 224 illuminates the upper light-emitting unit 207a1 in red. This indicates that the sheet material is stuck downstream of the upper conveying unit 207c1.

[0128] This exemplary embodiment handles the case where the CPU 224 determines whether the sheet is stuck in the downstream portion of the lower conveying unit 207c2 based on the detection result of the channel sensor 207d2. This exemplary embodiment handles the case where, if the sheet is stuck in the downstream portion of the lower conveying unit 207c2, the CPU 224 illuminates the lower light-emitting unit 207a2 in red. This indicates that the sheet is stuck in the lower conveying unit 207c2. Examples of methods for detecting sheet sticking are the same as described above, therefore a detailed description of methods for detecting sheet sticking will be omitted.

[0129] Next, the inversion unit 208 will be described. This exemplary embodiment processes the transmission units 208c1 and 208c2 located in... FIG. 4The situation is as shown in the diagram. Channel sensors 208d1 and 208d2 are located downstream of conveying units 208c1 and 208c2, respectively. This exemplary embodiment processes the case where the CPU 224 determines, based on the detection result of channel sensor 208d1, whether the sheet is stuck in the downstream portion of the upper conveying unit 208c1. This exemplary embodiment processes the case where, if the sheet is stuck in the downstream portion of the upper conveying unit 208c1, the CPU 224 illuminates the upper light-emitting unit 208a1 in red. This indicates that the sheet is stuck in the downstream portion of the upper conveying unit 208c1.

[0130] This exemplary embodiment handles the case where the CPU 224 determines whether the sheet is stuck in the downstream portion of the lower conveying unit 208c2 based on the detection result of the channel sensor 208d2. This exemplary embodiment handles the case where, if the sheet is stuck in the downstream portion of the lower conveying unit 208a2, the CPU 224 illuminates the lower light-emitting unit 208a2 in red. This indicates that the sheet is stuck in the lower conveying unit 208c2. Examples of methods for detecting sheet sticking are the same as described above, therefore a detailed description of methods for detecting sheet sticking will be omitted here.

[0131] Next, the discharge unit 209 will be described. This exemplary embodiment processes the transfer units 209c1 and 209c2 located in... FIG. 4 The situation is as shown in the diagram. Channel sensors 209d1 and 209d2 are located downstream of conveying units 209c1 and 209c2, respectively. This exemplary embodiment processes the CPU 224 to determine whether the sheet material is stuck downstream of the upper conveying unit 209c1 based on the detection result of channel sensor 209d1. This exemplary embodiment processes the case where, if the sheet material is stuck downstream of the upper conveying unit 209c1, the CPU 224 illuminates the upper light-emitting unit 209a1 in red. This indicates that the sheet material is stuck downstream of the upper conveying unit 209c1.

[0132] This exemplary embodiment handles the case where the CPU 224 determines whether the sheet is stuck in the downstream portion of the lower conveying unit 209c2 based on the detection result of the channel sensor 209d2. This exemplary embodiment handles the case where, if the sheet is stuck in the downstream portion of the lower conveying unit 209c2, the CPU 224 illuminates the lower light-emitting unit 209a2 in red. This indicates that the sheet is stuck in the lower conveying unit 209c2. Examples of methods for detecting sheet sticking are the same as described above, therefore a detailed description of methods for detecting sheet sticking will be omitted here.

[0133] FIG. 5 This diagram illustrates an example of a management screen 500. This exemplary embodiment deals with the case where the management screen 500 is displayed on a display device 104 connected to the DFE 103. (Refer to...)FIG. 5 Examples of screen components and user interfaces commonly seen in subsequent screens are described. The user interface may include the operation unit 222 and a graphical user interface (GUI). For example, the display of management screen 500 is controlled by DFE 103. Screen 500 may be displayed by a device other than DFE 103. In this case, the display of management screen 500 may be controlled by a device other than DFE 103.

[0134] Various areas for displaying the status of the image forming apparatus 101 are arranged on the management screen 500.

[0135] Alarm zone 506 displays a color corresponding to the state of image forming apparatus 101.

[0136] The color of the alarm zone 506 can notify the user of the status of the image forming apparatus 101. In this case, the alarm zone 506 can display different colors according to the status of the image forming apparatus 101. For example, when the image forming apparatus 101 is in a normal state, the alarm zone 506 displays green, indicating a normal state.

[0137] The status area 507 displays text information indicating the status of the image forming apparatus 101. The text information displayed on the status area 507 can notify the user of the status of the image forming apparatus 101. FIG. 5 The status area 507 shows a "ready" status, which indicates that the image forming apparatus 101 is in a normal state, ready for use, and not in operation.

[0138] The detailed status area 508 displays more detailed information about the status of the image forming apparatus 101. The information displayed in the detailed status area 508 can inform the user of the more detailed status of the image forming apparatus 101. The detailed status area 508 is used when it is necessary to inform the user of more detailed information than the simplified information displayed in the status area 507, such as when an error occurs in the image forming apparatus 101. FIG. 5 This illustrates a situation where no information is displayed in the detailed status area 508 because no error occurred in the image forming apparatus 101.

[0139] Multiple user interfaces for users to select various operations of the image forming apparatus 101 are arranged at the bottom of the management screen 500.

[0140] The scheduling unit 501 includes a user interface that is operated by the user when switching to a screen for setting and displaying scheduling information about the print jobs to be performed by the image forming apparatus 101.

[0141] The job management unit 502 includes a user interface that is operated by the user when switching to a screen for configuring various settings for the print job to be performed by the image forming apparatus 101 and operating the print queue.

[0142] The feed section setting unit 503 includes a user interface for operation when switching to a screen for setting the sheet material of the plurality of feed sections 202e1 to 202e3, 203e1 to 203e3 and 204e1 to 204e3 included in the image forming apparatus 101.

[0143] The system settings unit 504 includes a user interface that is operated by the user when switching to a screen for performing various functions related to the general system settings of the image forming apparatus 101.

[0144] The service execution unit 505 includes a user interface that is operated by the user when switching to a screen for performing various functions for maintaining the image forming apparatus 101.

[0145] FIG. 5 The diagram shows the scheduling unit 501, the work management unit 502, the feed section setting unit 503, the system setting unit 504, and the service execution unit 505, including buttons as a user interface (GUI). FIG. 5 The status of the feed section setting unit 503 is shown.

[0146] The functions and examples of screen components implemented when the feed section setting unit 503 is selected will now be described.

[0147] exist FIG. 5 In the image forming apparatus 101, the sheet setting unit 509 includes a user interface for users to operate when setting specific sheets for the feed sections 202e1 to 202e3, 203e1 to 203e3 and 204e1 to 204e3 of the image forming apparatus 101.

[0148] The sheet setting cancellation unit 510 includes a user interface for users to cancel sheet settings performed by the sheet setting unit 509 for a specific feed segment.

[0149] FIG. 5 The sheet setting unit 509 and the sheet setting cancellation unit 510 are shown as buttons used as a user interface (GUI).

[0150] FIG. 5 This illustration shows the case where, when the feed segment setting unit 503 is selected, nine feed segment display units are displayed on the management screen 500. Each feed segment display unit includes a user interface. This exemplary embodiment addresses the case where the feed segment display unit includes buttons as a user interface (GUI). FIG. 5This illustrates the display of feed section number 511, remaining sheet level diagram 512, and media information 513 on each feed section display unit. For ease of explanation, FIG. 5 The figure shows only one of the nine feed section display sections (511 to 513). In the figure, "medium" refers to the sheet material.

[0151] FIG. 5 This shows the case where, if no sheet is set for the feed section, "Unspecified" is displayed as medium information 513, meaning no sheet is set.

[0152] FIG. 5 The diagram shows that feed segment numbers 511 1, 2 and 3 represent feed segments 202e1, 202e2 and 202e3 of feed unit 202, respectively. FIG. 5 The diagram shows that feed segment numbers 511 4, 5 and 6 represent feed segments 203e1, 203e2 and 203e3 of feed unit 203, respectively. FIG. 5 The diagram shows that feed segment numbers 511 7, 8 and 9 represent feed segments 204e1, 204e2 and 204e3 of feed unit 204, respectively.

[0153] FIG. 6 The feed section display shows that feed sections 202e1, 202e3, 203e1, and 203e2, numbered 511 1, 3, 4, and 5, are in a state where a medium (sheet) is being fed. On the other hand, FIG. 6 The feed section display shows that feed sections 202e2, 203e3, 204e1, 204e2 and 204e3, which are numbered 511 2, 6, 7, 8 and 9, are in a state where no medium is set.

[0154] FIG. 6 This shows the case where feed segment 203e3, numbered 511, is selected. In this state, selecting the sheet setting unit 509 means that an instruction is being given to set the medium (sheet) for feed segment 203e3.

[0155] FIG. 6 This is a diagram showing an example of the display of the management screen 500 when the schedule setting section 501 is selected while the print job is in execution or standby mode.

[0156] Schedule area 601 displays the elapsed time until the printing of print jobs in the execution state and execution standby state is completed.

[0157] In media areas 602 and 603, information about the media (sheets) used in print jobs during execution and standby states is displayed from top to bottom in ascending order of the time the media was used in the print job.

[0158] Print schedules 607 to 609 are information indicating the time required to complete the printing of the media (sheet) displayed on media areas 602 and 603. FIG. 6 The media area 602 shows the case where the media (sheet) used in the printing job is A4 plain paper with a weight of 100 grams per square meter. FIG. 6 The diagram shows a scenario where printing schedules 607 and 608 display information indicating the time required to complete printing on this medium (sheet). FIG. 6 The media area 603 also shows the case where the media (sheet) used in the printing job is A4 plain paper with a weight of 300 grams per square meter. FIG. 5 This illustrates a scenario where the printing schedule 609 displays information indicating the time required to complete the printing of this medium (sheet).

[0159] FIG. 6 The illustration shows a scenario where the printing schedule for the media (sheet) to be displayed on media area 602 is divided into two printing schedules, 607 and 608. This means that at the moment of switching to printing schedule 608, the sheet will be short (the sheet will be exhausted). In this case, for example, printing schedules 607 and 608 can be displayed in different colors. For example, printing schedule 607 can be displayed in green, while printing schedule 608 can be displayed in yellow. Furthermore, for example, when printing is in progress and the sheet is actually short (exhausted), the printing schedule can be displayed in a different color than in other cases. For example, when printing is in progress and the sheet is actually short (exhausted), printing schedule 609 for the media (sheet) displayed on media area 603 can be displayed in red.

[0160] The printing time is calculated based on the type of medium (sheet) set for the printing job and the current state of the image forming apparatus 101. This calculation can be performed by the DFE 103, the image forming apparatus 101, or the information processing apparatus 102.

[0161] Discharge tray areas 604 and 605 are displayed from top to bottom in ascending order of media discharge timing, indicating the discharge destination information for the media (sheets) set for the print job in both the execution state and the execution standby state.

[0162] The display scale modification unit 606 includes a user interface that is operated by the user when switching to a screen for modifying the scale of the timeline displayed on the schedule area 601.

[0163] FIG. 6 This indicates that in response to the transition to the execution state (running state) of a print job, the information displayed in the aforementioned alarm area 506, status area 507, and detailed status area 508 has changed from... FIG. 6 The information shown has changed.

[0164] FIG. 6 Alert zone 506 is highlighted in yellow to warn the user that some action is required. FIG. 7 Status area 507 displays the printing status of the print job currently being processed. FIG. 7 In the detailed status area 508, information is displayed regarding the specific actions required as indicated by the alarm area 506. Specifically, FIG. 7 The following situation is shown: Detailed status area 508 displays information indicating that the feed segment needs to be replenished with media A. The CPU 217 can variably set the timing for issuing warnings using alarm area 506 and detailed status area 508, referring to the time when the currently processing print job will be interrupted unless processing is performed.

[0165] FIG. 7 This is a flowchart illustrating a processing example in an image forming system according to this exemplary embodiment. FIG. 7 This illustrates a situation where the image forming system determines whether printing stops during a print job (before the print job is completed) due to a shortage of sheet material. FIG. 7 This illustrates how, if printing is stopped during a print job in progress due to a shortage of sheet material, the image forming system controls the illumination of light-emitting units 202a3 to 204a3 based on the status of the print job and the storage status of the sheet material in the feed section. For example, when DFE 103 sets one or more print jobs in the print queue, it starts illuminating the light-emitting units 202a3 to 204a3 based on the status of the print job and the storage status of the sheet material in the feed section. FIG. 7 The flowchart processing. For example, the CPU 217 reads various programs stored in the SSD 221 into the RAM 220 for processing according to... FIG. 6 The flowchart processing can be performed by a device different from DFE 103. FIG. 7 The processing of the flowchart. For example, if the image forming system only includes image forming apparatus 101, then the image forming apparatus 101 can perform the processing according to... FIG. 7 The processing of flowcharts.

[0166] In step S701, the CPU 217 determines whether there will be a sheet shortage during the processing and standby printing jobs. For example, if a print job includes 1000 pages of image data and 500 sheets are set in the feed section, and the print job is set to single-sided printing and 1-in-1 printing, the CPU 217 determines that there will be a sheet shortage during the processing and standby printing jobs. In this case, if the print job is set to duplex printing and 1-in-1 printing, the CPU 217 determines that there will be no sheet shortage during the processing and standby printing jobs. In this case, if the print job is set to single-sided printing and 2-in-1 printing, the CPU 217 determines that there will be no sheet shortage during the processing and standby printing jobs. On the other hand, in another scenario where a print job includes 1000 pages of image data and 2000 sheets are set in the feed section, if single-sided printing and 1-in-1 printing are set for the print job, the CPU 217 determines that there will be no sheet shortage during processing and during standby print jobs. For example, as described above, the microprocessor 202b determines whether there will be a sheet shortage before the print job is completed. The CPU 217 can perform the determination in step S701 based on this determination result. Instead of the microprocessor 202b, or in addition to the microprocessor 202b, a device other than the microprocessor 202b can determine whether there will be a sheet shortage before the print job is completed. For example, a device other than the microprocessor 202b refers at least to the CPU 217 or the CPU 224.

[0167] If, as determined by step S701, there is no shortage of sheet material during the printing job ("No" in step S701), the process proceeds to step S708 as described below. On the other hand, if there is a shortage of sheet material during the printing job ("Yes" in step S701), the process proceeds to step S702.

[0168] In step S702, CPU 217 determines whether the feed segment has been replenished with the missing sheet, or whether the print queue has been updated, or both. If, as a result of the determination in step S702, the feed segment has been replenished with the missing sheet, or the print queue has been updated, or both ("Yes" in step S702), the process returns to step S701. On the other hand, if, as a result of the determination in step S702, the feed segment has not been replenished with the missing sheet, and the print queue has not been updated ("No" in step S702), the process proceeds to step S703. Here, updating the print queue refers to an update that affects whether a sheet shortage occurs and the timing of the sheet shortage occurrence. Examples of such updates to the print queue include deleting standby print jobs and changing the execution order of standby print jobs.

[0169] In step S703, the CPU 217 determines whether a warning display time, determined by the time of material shortage, has been reached. The time of material shortage is specified based on a value indicating the number of sheets the image forming system needs to print per minute. For example, if 500 sheets are set in the sheet segment and the value indicates 100 ppm, the time is 5 minutes later. The warning display time is preferably the time before the material shortage. If, as a result of this determination, the warning display time has not been reached ("No" in step S703), the process returns to step S702. On the other hand, if the warning display time has been reached ("Yes" in step S703), the process proceeds to step S704. As used herein, where appropriate, the remaining amount and state of the material at the time of the warning display time will be referred to as "close to 0". For example, with the use of… FIG. 8 Similar to the warning timing settings in the detailed status area 508 shown, the CPU 217 can variably set the warning display time. For example, the CPU 217 can set the warning display time to the time when the currently processing print job will be interrupted unless processing is performed to replenish sheet material for the feed section. The time when the currently processing print job will be interrupted (the time when sheet material will be insufficient) is determined based on the amount of sheet material set for the print job but not yet used and the time it takes to print that amount of sheet material. The same warning display time is set for print jobs in standby mode as for print jobs in progress.

[0170] In step S704, the CPU 217 illuminates the light-emitting units 202a3, 203a3 and 204a3 of all feed units 202 to 204 in yellow.

[0171] In step S705, CPU 217 determines whether the missing sheet material has been replenished to the feed section, or whether the print queue has been updated, or both. The determination in step S705 is similar to that in step S702. If, as a result of the determination in step S705, the missing sheet material has been replenished to the feed section, or the print queue has been updated, or both ("Yes" in step S705), the process returns to step S701. On the other hand, if, as a result of the determination in step S705, the missing sheet material has not been replenished to the feed section, and the print queue has not been updated ("No" in step S705), the process proceeds to step S706.

[0172] In step S706, CPU 217 determines whether the sheet material has actually been exhausted. If, as a result of this determination, the sheet material has not been exhausted ("No" in step S706), the process returns to step S705. On the other hand, if the sheet material has been exhausted ("Yes" in step S706), the process proceeds to step S707.

[0173] In step S707, the CPU 217 illuminates the light-emitting units 202a3, 203a3, and 204a3 of all feed units 202 to 204 in red. Once step S707 is completed, according to... FIG. 1 The processing of the flowchart has ended.

[0174] As described above, if, as a result of step S701, there is no shortage of sheet material during the printing job ("No" in step S701), the process proceeds to step S708. In step S708, CPU 217 determines whether the print queue was updated before printing was stopped. If, as a result of step S708, the print queue was not updated before printing was stopped ("No" in step S708), then according to... FIG. 3A The flowchart processing ends. On the other hand, if, as a result of the determination in step S708, the print queue is updated before printing stops and the job queue is updated before printing stops ("Yes" in step S708), then the process returns to step S701. Here, updating the print queue refers to updates that may lead to a sheet shortage. Examples of such updates to the print queue include adding print jobs and changing the sheet used in standby print jobs. In other words, updating the print queue here does not include updates for deleting standby print jobs. The possible causes of printing stoppage described in this step do not include a sheet shortage.

[0175] FIG. 1 This is a diagram illustrating examples of the illumination states of the light-emitting units (notification device 212 and light-emitting units 202a3 to 202a6 and 203a3 to 203a6) corresponding to the status of the print job, the status of the image forming apparatus 101, and various types of setting information. Light-emitting units 202a3 and 203a3 are light-emitting units respectively arranged on the feed units 202 and 203 (see...). FIG. 3A and FIG. 1 Light-emitting units 202a4, 202a5, and 202a6 are light-emitting units respectively arranged on feed sections 202e1, 202e2, and 202e3 (see...). FIG. 8 and FIG. 8 Light-emitting units 203a4, 203a5, and 203a6 are light-emitting units respectively arranged on feed sections 203e1, 203e2, and 203e3 (see...). FIG. 8 Here, only a pattern depicting the lit state of the required light-emitting unit is shown. FIG. 8 Not all patterns of the illumination states of the light-emitting units are listed. This exemplary embodiment deals with the case where the image forming apparatus 101 includes three feed units 202 to 204. However, for ease of explanation and description, the following description will be given under the assumption that only feed units 202 and 203 are used.

[0176] The job queue field 811 lists print jobs that are being processed or are in standby mode, as well as information about the media (sheets) set for the print jobs. FIG. 8 This illustrates a scenario where print jobs are executed in the order listed in the job queue field 811 from top to bottom. For simplicity, this exemplary embodiment deals with the case where only one type of media (sheet) is set for each print job. However, two or more types of media (sheets) can be set for a single print job.

[0177] The device status field 812 lists information indicating the state of the image forming apparatus 101, whether it is in printing mode or printing stopped mode. FIG. 1 to FIG. 8 In this context, the image forming apparatus 101 being in a printing state is referred to as "running," and the image forming apparatus 101 being in a printing stop state is referred to as "stopping."

[0178] The No Sheet Status field 813 lists information indicating the status of each print job in the job queue field 811 ("near 0", "no sheet", or "sufficient", where "sufficient" indicates that it is not one of the first two states). For example, the information set in the No Sheet Status field 813 is determined based on the remaining amount of media (sheets) stored in the feed units 202 and 203 and the amount of media (sheets) that have not yet been used in the print job.

[0179] The illumination status field 814 of the notification device 212 lists information indicating the illumination status of the notification device 212.

[0180] The medium setting information field 815 for the feed unit 202 lists information indicating the medium (sheet) stored in the feed sections 202e1 to 202e3 in the feed unit 202.

[0181] The medium setting information field 816 for the feed unit 203 lists information indicating the medium (sheet) stored in the feed sections 203e1 to 203e3 in the feed unit 203.

[0182] exist FIG. 9 In this context, "top section" refers to feed sections 202e1 and 203e1, "middle section" refers to feed sections 202e2 and 203e2, and "bottom section" refers to feed sections 202e3 and 203e3.

[0183] The feed segment in operation field 817 lists information indicating the feed segment of the currently feeding sheet.

[0184] The illumination status field 818 of the light-emitting unit 202a3 of the feed unit 202 lists information indicating the illumination status of the light-emitting unit 202a3.

[0185] The illumination status field 819 of the light-emitting unit 203a3 of the feed unit 203 lists information indicating the illumination status of the light-emitting unit 203a3.

[0186] Field 820 of the light-emitting units 202a4 to 202a6 in the feed sections 202e1 to 202e3 lists information indicating the lighting status of the light-emitting units 202a4 to 202a6.

[0187] Field 821 of the light-emitting units 203a4 to 203a6 in the feed sections 203e1 to 203e3 lists information indicating the lighting status of the light-emitting units 203a4 to 203a6.

[0188] Examples 801 to 809 are sets of information listed in fields 811 to 821 when the status of the print job and the status of feed units 202 and 203 change.

[0189] Example 801 illustrates the following scenario: the job queue includes job 1 and job 2 as print jobs, feed units 202 and 203 store sufficient media (sheets) for both print jobs, and the image forming apparatus 101 is operating. In this case, the light-emitting units 202a3 and 203a3 of feed units 202 and 203 are both off. Only the light-emitting unit of the feed segment currently feeding the sheet (light-emitting unit 202a4 of feed segment 202e1 of feed unit 202) is lit in green.

[0190] Here, we will describe the situation where the light-emitting units 202a4 to 202a6 and 203a4 to 203a6 of the feed sections 202e1 to 202e3 and 203e1 to 203e3 of the feed units 202 and 203 are illuminated green during sheet feeding and turned off in other situations. Therefore, in FIG. 7 In the following description, detailed descriptions of the lighting states of the light-emitting units 202a4 to 202a6 and 203a4 to 203a6 of the feed sections 202e1 to 202e3 and 203e1 to 203e3 will be omitted.

[0191] Example 802 illustrates the following scenario: the job queue includes job 1 and job 2 as print jobs, the medium A used in job 1 is "close to zero", and the image forming apparatus 101 is operating. In this case, the light-emitting units 202a3 and 203a3 of the feed units 202 and 203 are both lit up in yellow.

[0192] Case example 803 represents a situation where the job queue does not contain any print jobs and the image forming apparatus 101 stops. In this case, since there are no print jobs, the light-emitting units 202a3 and 203a3 of the feed units 202 and 203 are both turned off.

[0193] Example 804 illustrates the following scenario: the job queue includes job 1 and job 2 as print jobs, the medium A used in job 1 is "sheetless", and the image forming apparatus 101 is stopped. In this case, the light-emitting units 202a3 and 203a3 of the feed units 202 and 203 are both lit up in red.

[0194] Example 805 illustrates a scenario where the job queue includes jobs 1 and 2 as print jobs, the medium B used in job 2 is "close to zero," and the image forming apparatus 101 is operating. In this case, the light-emitting units 202a3 and 203a3 of the feed units 202 and 203 are both illuminated in yellow. Example 805 also covers a scenario where the remaining amount of medium B used in job 2 is zero, that is, the amount of medium B stacked and stored in the intermediate feed section 203e2 of the feed unit 203 is zero.

[0195] Example 806 illustrates the following scenario: the job queue includes job 2 as a print job, the medium B used in job 2 is "close to zero", and the image forming apparatus 101 is operating. In this case, the light-emitting units 202a3 and 203a3 of the feed units 202 and 203 are both lit up in yellow.

[0196] Example 807 illustrates the following scenario: the job queue includes job 2 as a print job, the medium B used in job 2 is "sheetless", and the image forming apparatus 101 is stopped. In this case, the light-emitting units 202a3 and 203a3 of the feed units 202 and 203 are both lit up in red.

[0197] Example 808 illustrates the following scenario: the job queue includes job 1 and job 2 as print jobs, where medium A used in job 1 is "no sheet", medium B used in job 2 is "close to zero", and the image forming apparatus 101 is stopped. In this case, the light-emitting units 202a3 and 203a3 of the feed units 202 and 203 are both lit up in red.

[0198] Example 809 illustrates the following scenario: the job queue includes job 1 and job 2 as print jobs, where media A used in job 1 is "without sheet" and media B used in job 2 is "without sheet," and the image forming apparatus 101 is stopped. In this case, the light-emitting units 202a3 and 203a3 of the feed units 202 and 203 are both illuminated in red.

[0199] As described above, in this exemplary embodiment, the image forming system controls the operation of the light-emitting units 202a3, 203a3, and 204a3 based on the storage state of the sheets in the feed units 202 to 204 for printing jobs being processed and those in standby. For example, the storage state is determined based on the amount of sheet material set for printing jobs but not yet used and the amount of sheet material set for printing jobs and stored in the feed units. Therefore, a user can, for example, detect sheet shortages before completing a printing job that has been instructed to be performed by observing the light-emitting units 202a3, 203a3, and 204a3 arranged on the feed units 202 to 204. This reduces the chance of overlooking sheet shortages. Consequently, the convenience of the image forming apparatus 101 can be improved. Sheet shortages are notified by illuminating the light-emitting units 202a3, 203a3, and 204a3 arranged on the feed units 202, 203, and 204. Therefore, even in locations far from the image forming apparatus 101, a user can detect sheet shortages. Therefore, the user does not need to approach the image forming apparatus 101 to detect a shortage of sheet material. Thus, an image forming apparatus 101 that can be used more efficiently can be provided. For example, by constructing a notification using light-emitting units 202a3, 203a3, and 204a3 differently from a notification issued by changing the shape represented by a combination of the on / off states of multiple light-emitting units, an image forming apparatus 101 that can be used more efficiently can be provided.

[0200] The remaining quantity notification units 202g1 to 202g3, 203g1 to 203g3 and 204g1 to 204g3 are provided on the feed units 202e1 to 202e3, 203e1 to 203e3 and 204e1 to 204e3 so that the user can detect the degree of sheet shortage.

[0201] Next, a second exemplary embodiment will be described. In this exemplary embodiment, the light-emitting units 202a3 to 204a3 of all feed units 202 to 204 are described as lighting up when the sheet material set for a printing job becomes "close to 0" or is exhausted (0). However, lighting up the light-emitting units 202a3 to 204a3 of all feed units 202 to 204 would make it difficult for the user to effectively determine which feed unit to replenish the sheet material. In view of this, this exemplary embodiment addresses the case where the light-emitting units of the light-emitting units 202a3, 203a3, and 204a3 that are feed units storing close to 0 sheets of sheet material or feed units that have exhausted the sheet material (0) are lit up. This allows the user to more effectively determine which feed unit to replenish the sheet material. Therefore, the main difference between this exemplary embodiment and the first exemplary embodiment lies in the control of the operation of the light-emitting units 202a3, 203a3, and 204a3. Therefore, in the description of this exemplary embodiment, the parts similar to the first exemplary embodiment are... FIG. 9The same reference numerals are used in the accompanying drawings, and their detailed descriptions will be omitted.

[0202] FIG. 7 This is a flowchart illustrating a processing example in an image forming system according to this exemplary embodiment. FIG. 9 Same, FIG. 9 It also illustrates a scenario where the image forming system determines whether printing stops due to a shortage of sheet material during the execution of a print job (before the print job is completed). FIG. 7 Same, FIG. 9 It is also shown that if printing is stopped during a printing job due to a shortage of sheet material, the image forming system controls the illumination of the light-emitting units 202a3 to 204a3 based on the status of the printing job and the storage status of the sheet material in the feed unit.

[0203] Now will describe FIG. 7 Flowcharts and FIG. 9 The differences in the flowcharts.

[0204] exist FIG. 7 In the flowchart, step S901 is performed, replacing... FIG. 10 The processing of step S704 in the process.

[0205] In step S901, the CPU 217 illuminates only the light-emitting units of the light-emitting units 202a3 to 204a3 that store the feed unit of the "near-zero" sheet in yellow.

[0206] exist FIG. 10 In the flowchart, step S902 is performed, replacing... FIG. 8 The processing in step S707. In step S902, the CPU 217 only lights up the light-emitting unit of the feed unit that actually depletes the sheet material among the light-emitting units 202a3, 203a3 and 204a3 in red.

[0207] FIG. 10 This is a diagram showing examples of the illumination states of the light-emitting units (notification device 212 and light-emitting units 202a3 to 202a6 and 203a3 to 203a6) corresponding to the status of the print job, the status of the image forming apparatus 101, and various types of setting information. FIG. 8 and FIG. 8 The only difference lies in the lighting state of the light-emitting units 202a3 and 203a3 in the feeding units 202 and 203. FIG. 10 In, with FIG. 8 The difference is indicated by a slash. Now we will focus on the difference between... FIG. 8 To describe the differences FIG. 8 An example of the lit state of the light-emitting unit shown.

[0208] Example 1005 illustrates the following scenario: the job queue includes job 1 and job 2 as print jobs, the media B used in job 2 is "close to zero," and the image forming apparatus 101 is operating. FIG. 1 to FIG. 10 In the illustrated example 805, both the light-emitting units 202a3 and 203a3 of the feed units 202 and 203 are illuminated in yellow. In contrast, in this exemplary embodiment, only the light-emitting unit 203a3 of the feed unit 203 for the medium B is illuminated in yellow between the light-emitting units 202a3 and 203a3.

[0209] Example 1006 illustrates the following scenario: the job queue includes only job 2 as a print job, the medium B used in job 2 is "close to zero", and the image forming apparatus 101 is operating. In this example, as in example 1005, between light-emitting units 202a3 and 203a3, only the light-emitting unit 203a3 of the medium B feed unit 203 is illuminated in yellow.

[0210] Example 1007 illustrates the following scenario: the job queue contains only job 2 as a print job, the media B used in job 2 is "sheetless," and the image forming apparatus 101 is stopped. FIG. 11 In the illustrated example 807, both the light-emitting units 202a3 and 203a3 of the feed units 202 and 203 are lit in red. In contrast, in this exemplary embodiment, only the light-emitting unit 203a3 of the feed unit 203 for the medium B is lit in red between the light-emitting units 202a3 and 203a3.

[0211] Example 1008 illustrates the following scenario: the job queue includes job 1 and job 2 as print jobs, where media A used in job 1 is "no sheet" and media B used in job 2 is "close to zero," and the image forming apparatus 101 is stopped. FIG. 9 In example 808, the light-emitting units 202a3 and 203a3 of feed units 202 and 203 are both lit in red. In contrast, in this exemplary embodiment, the light-emitting unit 202a3 of the feed unit 202 for the "sheetless" medium A is lit in red, and the light-emitting unit 203a3 of the feed unit 203 for the medium B is lit in yellow.

[0212] As described above, in this exemplary embodiment, the image forming system illuminates only the light-emitting units of light-emitting units 202a3 to 204a3 that store sheet material expected to be insufficient before the printing job is completed, using yellow. The image forming system also illuminates only the light-emitting units of light-emitting units 202a3 to 204a3 that are actually depleted of sheet material, using red. Therefore, the user can more effectively determine which feed unit to replenish the sheet material. Various modifications described in the first exemplary embodiment can also be employed with respect to this exemplary embodiment.

[0213] Next, a third exemplary embodiment will be described. The second exemplary embodiment has addressed the case where, when the sheet set for a print job becomes "close to 0", the light-emitting units of all feed units storing the sheet are illuminated. However, the feed segment of the currently feeding sheet cannot be replenished. Therefore, even if the light-emitting units of the feed units including the feed segments are illuminated, the user cannot replenish the feed segments. In view of this, this exemplary embodiment addresses the case where, when the sheet set for a print job becomes "close to 0", the operation of the light-emitting units of the feed units storing the sheet is controlled according to the feed state of the sheet in the feed units. This allows the user to more effectively determine the feed units from which sheet can be replenished. Therefore, the main difference between this exemplary embodiment and the first and second exemplary embodiments lies in the control of the operation of the light-emitting units 202a3, 203a3, and 204a3. Therefore, in the description of this exemplary embodiment, portions similar to the first and second exemplary embodiments are... FIG. 11 The same reference numerals are used in the accompanying drawings, and their detailed descriptions will be omitted.

[0214] FIG. 9 This is a flowchart illustrating a processing example in an image forming system according to this exemplary embodiment. FIG. 11 Same, FIG. 11 It also illustrates a scenario where the image forming system determines whether printing stops due to a shortage of sheet material during the execution of a print job (before the print job is completed). FIG. 7 Same, FIG. 9 The following situation is illustrated: If printing is stopped during a printing job due to a shortage of sheet material, the image forming system controls the illumination of light-emitting units 202a3 to 204a3 based on the status of the printing job and the storage status of the sheet material in the feed unit.

[0215] Now will describe FIG. 11 Flowcharts and FIG. 9 and FIG. 12 The differences in the flowcharts.

[0216] exist FIG. 12 In the flowchart, step S1101 is performed, replacing... FIG. 10The processing of step S901. In step S1101, the CPU 217 only lights up the light-emitting units of light-emitting units 202a3, 203a3 and 204a3 that store "close to 0" sheet and include the feed unit of the feed segment that is not currently feeding sheet, in yellow.

[0217] FIG. 12 This is a diagram showing examples of the illumination states of the light-emitting units (notification device 212 and light-emitting units 202a3 to 202a6 and 203a3 to 203a6) corresponding to the status of the print job, the status of the image forming apparatus 101, and various types of setting information. FIG. 10 and FIG. 10 The only difference lies in the lighting state of the light-emitting units 202a3 and 203a3 in the feeding units 202 and 203. FIG. 12 In, with FIG. 8 The differences are indicated by slashes. Now we will focus on... FIG. 10 Difference description FIG. 10 An example of the lit state of the light-emitting unit shown.

[0218] Example 1202 illustrates the following scenario: the job queue includes job 1 and job 2 as print jobs, media A used in job 1 is "close to zero," and the image forming apparatus 101 is operating. FIG. 1 to FIG. 12 and FIG. 13 In the illustrated examples 802 and 1002, both light-emitting units 202a3 and 203a3 of feed units 202 and 203 are illuminated in yellow. In contrast, in this exemplary embodiment, the top feed segment 202e1 of feed unit 202 is currently feeding medium A, and medium A is not stored in any other feed segment of feed unit 202. Therefore, CPU 217 determines that feed unit 202 cannot feed medium A. In this case, among the light-emitting units 202a3 and 203a3, only the light-emitting unit 203a3 of feed unit 203 is illuminated in yellow.

[0219] Example 1206 illustrates the following scenario: the job queue includes job 2 as a print job, the media B used in job 2 is "close to zero," and the image forming apparatus 101 is operating. FIG. 7In example 1006, only the light-emitting unit 203a3 of the feeding unit 203 for medium B is illuminated in yellow between light-emitting units 202a3 and 203a3. In contrast, in this exemplary embodiment, the intermediate feed segment 203e2 of the feeding unit 203 is currently feeding medium B, and medium B is not stored in any other feed segment of the feeding unit 203. Therefore, the CPU 217 determines that the feeding unit 203 cannot feed medium B. In this case, the light-emitting unit 203a3 of the feeding unit 203 is turned off.

[0220] Similar to Example 1206, all light-emitting units 202a3, 203a3, and 204a3 may be turned off even if sheet replenishment is required. In this case, for example, CPU 217 can identify the light-emitting unit of the feed unit among the light-emitting units 202a3, 203a3, and 204a3 where the sheet quantity is "close to 0" as the light-emitting unit to be lit, and illuminate that light-emitting unit in yellow. For example, CPU 217 can identify the light-emitting unit of the light-emitting units 202a3, 203a3, and 204a3 that includes a feed segment without sheet storage as the light-emitting unit to be lit, and illuminate that light-emitting unit in yellow. This can prompt the user to replenish sheet for feed segments that do not contain sheet.

[0221] As described above, in this exemplary embodiment, the image forming system controls the operation of the light-emitting unit based on the storage state of the sheet set for the printing job in the feed unit and the feed state of the sheet from the feed unit. For example, when the sheet becomes "close to 0", the image forming system only illuminates the light-emitting unit of the feed unit that includes the feed segment that stores the sheet and is not currently feeding sheet in yellow. This allows the user to more effectively determine the feed units that can be replenished with sheet. Various variations described in the first and second exemplary embodiments can also be used in this exemplary embodiment.

[0222] Next, a fourth exemplary embodiment will be described. The first to third exemplary embodiments have addressed the situation where, when the sheet material set for a printing job becomes "close to 0" or exhausted (0), the light-emitting units 202a3 to 204a3 of feed units 202 to 204 are illuminated. However, simply illuminating the light-emitting units 202a3 to 204a3 of feed units 202 to 204 may not be sufficient to effectively determine which feed segment of the feed unit has the sheet material close to 0 or exhausted (0). Therefore, this exemplary embodiment addresses the situation where the light-emitting units 202a4 to 202a6, 203a4 to 203a6, and 204a4 to 204a6 are illuminated, storing the sheet material that is "close to 0" or the sheet material that is exhausted (0). This allows the user to more effectively determine which feed segment of which feed unit the sheet material is "close to 0" or exhausted (0). Therefore, the main difference between this exemplary embodiment and the first to third exemplary embodiments lies in the control of the operation of the light-emitting units 202a4 to 202a6, 203a4 to 203a6, and 204a4 to 204a6. Therefore, in the description of this exemplary embodiment, the parts similar to those in the first to third exemplary embodiments are... FIG. 13 The same reference numerals are used in the accompanying drawings, and their detailed descriptions will be omitted.

[0223] This exemplary embodiment addresses the following situation: The following two lighting conditions are added as lighting conditions for the light-emitting units 202a4 to 202a6, 203a4 to 203a6, and 204a4 to 204a6 of the feed units 202 to 204 to the lighting conditions described in the first exemplary embodiment. The first lighting condition is that the light-emitting units in the feed segments of the light-emitting units 202a4 to 202a6, 203a4 to 203a6, and 204a4 to 204a6 of the feed units 202 to 204 that store "close to 0" sheet material are lit in yellow. The second lighting condition is that the light-emitting units in the feed segments of the light-emitting units 202a4 to 202a6, 203a4 to 203a6, and 204a4 to 204a6 of the feed units 202 to 204 that have actually exhausted the sheet material are lit in red.

[0224] FIG. 7 This is a flowchart illustrating a processing example in an image forming system according to this exemplary embodiment. FIG. 13 Same, FIG. 13 It also illustrates a scenario where the image forming system determines whether printing stops due to a shortage of sheet material during the execution of a print job (before the print job is completed). FIG. 13 Same, FIG. 7This illustrates that if printing is stopped during a print job due to a shortage of sheet material, the image forming system controls the illumination of light-emitting units 202a3 to 204a3 based on the status of the print job and the storage status of the sheet material in the feed section. (Refer to...) FIG. 13 An example of lighting control for light-emitting units 202a4 to 202a6, 203a4 to 203a6 and 204a4 to 204a6 will be described.

[0225] Now will describe FIG. 7 Flowcharts and FIG. 13 The differences in the flowcharts.

[0226] exist FIG. 7 In the flowchart, step S1301 is performed, replacing... FIG. 14 The processing in step S704. In step S1301, the CPU 217 illuminates the light-emitting units among the light-emitting units 202a4 to 202a6, 203a4 to 203a6, and 204a4 to 204a6, which store the sheet feed segment "close to 0". This exemplary embodiment processes the following situation: In step S1301, in addition to the processing for illuminating the light-emitting units, the CPU 217 also performs processing similar to that in step S704. In step S1301, for example, in addition to the processing for illuminating the light-emitting units, the CPU 217 may also perform processing similar to that in S901 or S1101, instead of step S704.

[0227] exist FIG. 14 In the flowchart, step S1302 is performed, replacing... FIG. 8 The processing in step S707. In step S1302, the CPU 217 illuminates only the light-emitting units 202a4 to 202a6, 203a4 to 203a6, and 204a4 to 204a6 in red, which are the light-emitting units in the feed section where the sheet material has been actually exhausted. In this exemplary embodiment, in step S1302, in addition to the processing for illuminating the light-emitting units, the CPU 217 performs a process similar to that in step S707. In step S1302, for example, in addition to the processing for illuminating the light-emitting units, the CPU 217 may also perform a process similar to that in step S902, instead of step S707.

[0228] FIG. 14 This is a diagram showing an example of the illumination status of the light-emitting units (notification device 212 and light-emitting units 202a3 to 202a6 and 203a3 to 203a6) corresponding to the status of the print job, the status of the image forming apparatus 101, and various types of setting information. FIG. 8 and FIG. 14The only difference is the lighting status of the light-emitting units 202a4 to 202a6 and 203a4 to 203a6 in the feed sections 202e1 to 202e3 and 203e1 to 203e3. FIG. 8 The lighting conditions of the light-emitting units 202a3 to 204a3 of the feed units 202 to 204 are shown in the first exemplary embodiment. FIG. 8 The lighting conditions are the same for all light-emitting units 202a3 to 204a3 of the feed units 202 to 204. However, the lighting conditions for the light-emitting units 202 to 204a3 can be the same as any of the lighting conditions described in the first exemplary embodiment to the third exemplary embodiment. FIG. 14 In, with FIG. 1 to FIG. 14 The difference is indicated by a slash. Now we will focus on the difference between... FIG. 15 Difference description FIG. 13 An example of the lit state of the light-emitting unit shown.

[0229] Example 1402 illustrates the following scenario: the job queue includes job 1 and job 2 as print jobs, the medium A used in job 1 is close to zero, and the image forming apparatus 101 is operating. Medium A is stored in the top feed section 202e1 of feed unit 202 and the top feed section 203e1 of feed unit 203. In this case, the light-emitting units 202a4 of feed section 202e1 of feed unit 202 and 203a4 of feed section 203e1 of feed unit 203 are illuminated in yellow.

[0230] Example 1406 illustrates the following scenario: the job queue includes job 2 as a print job, the medium B used in job 2 is close to zero, and the image forming apparatus 101 is operating. Medium B is stored only in the intermediate feed section 203e2 of the feed unit 203. In this case, the light-emitting unit 203a5 of the feed section 203e of the feed unit 203 is illuminated in yellow.

[0231] Example 1407 illustrates the following scenario: the job queue includes job 2 as a print job, the medium B used in job 2 is "sheetless", and the image forming apparatus 101 is stopped. Medium B is only set for the intermediate feed segment 203e2 of the feed unit 203. In this case, the light-emitting unit 203a5 of the feed segment 203e2 of the feed unit 203 is lit in red.

[0232] Although detailed descriptions of other case examples are omitted, the light-emitting units of the feed section with "near 0" or "no sheet" medium (sheet) are illuminated in the corresponding color.

[0233] As described above, in this exemplary embodiment, the image forming system illuminates the light-emitting units among light-emitting units 202a4 to 202a6, 203a4 to 203a6, and 204a4 to 204a6 that store feed segments with "near-zero" sheet material in yellow. In this exemplary embodiment, the image forming system also illuminates only the light-emitting units in the feed segments that have actually exhausted the sheet material in red.

[0234] Therefore, the user can effectively determine which feed units, in which segment, the sheet is "close to 0" or has been exhausted (0). Various variations described in the first to third exemplary embodiments can also be used in this exemplary embodiment.

[0235] Next, a fifth exemplary embodiment will be described. The fourth exemplary embodiment addresses the situation where, when the sheet set for a print job becomes "close to 0," the light-emitting units of all feed segments storing the sheet are illuminated. However, the feed segment currently feeding the sheet cannot replenish the sheet. Therefore, even if the light-emitting units of the feed segments are illuminated, the user cannot replenish the feed segments. In view of this, this exemplary embodiment addresses the situation where, when the sheet set for a print job becomes "close to 0," the operation of the light-emitting units of the feed segments storing the sheet is controlled according to the feed state of the sheet in the feed segments.

[0236] This allows the user to more effectively determine the feed units and feed sections that can replenish the sheet. Therefore, the main difference between this exemplary embodiment and the first to fourth exemplary embodiments lies in the control of the operation of the light-emitting units 202a4 to 202a6, 203a4 to 203a6, and 204a4 to 204a6. Therefore, in the description of this exemplary embodiment, the parts similar to those in the first to fourth exemplary embodiments are... FIG. 15 The same reference numerals are used in the accompanying drawings, and their detailed descriptions will be omitted.

[0237] FIG. 13 This is a flowchart illustrating a processing example in an image forming system according to this exemplary embodiment. FIG. 15 Same, FIG. 13 This illustrates a scenario where the image forming system determines whether printing is stopped due to a shortage of sheet material during the execution of a print job (before the print job is completed). FIG. 15 Same, FIG. 15 This illustrates that if printing is stopped during a print job due to a shortage of sheet material, the image forming system controls the illumination of light-emitting units 202a3 to 204a3 based on the status of the print job and the storage state of the sheet material in the feed section. FIG. 13 Same, FIG. 15 An example is shown of controlling the illumination of light-emitting units 202a4 to 202a6, 203a4 to 203a6 and 204a4 to 204a6.

[0238] Now will describe FIG. 13 Flowcharts and FIG. 16 The differences in the flowcharts.

[0239] exist FIG. 16 In the flowchart, step S1501 is performed, replacing... FIG. 14 The processing of step S1301. In step S1501, the CPU 217 illuminates only the light-emitting units among the light-emitting units 202a4 to 202a6, 203a4 to 203a6 and 204a4 to 204a6 that store "close to 0" sheet material and are not currently being fed sheet material.

[0240] FIG. 16 This is a diagram showing an example of the illumination status of the light-emitting units (notification device 212 and light-emitting units 202a3 to 202a6 and 203a3 to 203a6) corresponding to the status of the print job, the status of the image forming apparatus 101, and various types of setting information. FIG. 14 and FIG. 14 The only difference lies in the lighting state of the light-emitting units 202a4 to 202a6 and 203a4 to 203a6 in the feed sections 202e1 to 202e3 and 203e1 to 203e3. FIG. 16 In, with FIG. 16 The difference is represented by a slash. Now we will focus on the difference between... ​ Difference description ​ An example of the lit state of the light-emitting unit shown.

[0241] Example 1602 illustrates the following scenario: The job queue includes jobs 1 and 2 as print jobs. The medium A used in job 1 is "close to zero," and the image forming apparatus 101 is operating. Medium A is stored in the top feed section 202e1 of feed unit 202 and the top feed section 203e1 of feed unit 203. In feed sections 202e1 and 203e1, feed section 202e1 is currently feeding sheet material. In this case, the light-emitting unit 202a4 of feed section 202e1 of feed unit 202 is illuminated in green. The light-emitting unit 203a4 of feed section 203e1 of feed unit 203 is illuminated in yellow.

[0242] Example 1606 illustrates the following scenario: the job queue includes job 2 as a print job, the medium B used in job 2 is "close to zero," and the image forming apparatus 101 is operating. Medium B is stored only in the intermediate feed segment 203e2 of the feed unit 203. The feed segment 203e2 is currently feeding sheet material. In this case, the light-emitting unit 203a5 of the feed segment 203e2 of the feed unit 203 is illuminated in green.

[0243] Similar to Example 1606, even if sheet replenishment is required, the following situation may occur: only the light-emitting units of the current sheet feed segment are lit in green, while the other light-emitting units among light-emitting units 202a4 to 202a6, 203a4 to 203a6, and 204a4 to 204a6 are off. In this case, for example, CPU 217 can light up the light-emitting units of light-emitting units 202a4 to 202a6, 203a4 to 203a6, and 204a4 to 204a6 of the current sheet feed segment in yellow. Alternatively, for example, CPU 217 can light up the light-emitting units of feed segments that do not contain sheet in yellow. This can prompt the user to replenish sheet in feed segments that do not contain sheet. Alternatively, for example, when the light-emitting unit of the feed segment that needs to replenish the sheet (the feed segment that stores "near 0" sheet and is not currently feeding sheet) is lit in yellow, the light-emitting unit of the feed segment currently feeding sheet can be turned off instead of lit in green.

[0244] Although ​ The example does not include the scenario described, but it is possible for multiple feed segments to exist where the stored sheet (medium) is "close to zero" and no sheet is currently being fed. In this case, the CPU 217 can identify all the light-emitting units of the multiple feed segments as the light-emitting units to be lit and illuminate them in yellow. For example, to reduce the possibility of sheet shortage during sheet replenishment operations, the CPU 217 can identify the light-emitting unit of the feed segment storing the minimum number of sheets among the multiple feed segments as the light-emitting unit to be lit and illuminate it in yellow. This allows for explicit notification to the feed segment replenishing the sheet. Alternatively, the CPU 217 can identify only the light-emitting units of the feed segments among the multiple feed segments that store a number of sheets less than or equal to a predetermined number as the light-emitting unit to be lit and illuminate it in yellow. In this case, the light-emitting units of more than one feed segment can be lit.

[0245] As described above, in this exemplary embodiment, the image forming system illuminates the light-emitting units among light-emitting units 202a4 to 202a6, 203a4 to 203a6, and 204a4 to 204a6 that store "near 0" sheet material and are not currently feeding sheet material. The image forming system also illuminates the light-emitting units among light-emitting units 202a4 to 202a6, 203a4 to 203a6, and 204a4 to 204a6 that store "near 0" sheet material and are currently feeding sheet material in a green light-emitting segment. This allows the user to more effectively determine which feed units and feed segments can replenish the sheet material. Various variations described in the first to fourth exemplary embodiments can be used in this exemplary embodiment.

[0246] Other embodiments

[0247] Embodiments of the invention can also be implemented by a computer that reads and executes computer-executable instructions (e.g., one or more programs) recorded on a storage medium (also more fully referred to as a "non-transitory computer-readable storage medium") to perform one or more functions in the above embodiments, and / or includes one or more circuits (e.g., application-specific integrated circuits (ASICs)) for performing one or more functions in the above embodiments. Furthermore, embodiments of the invention can be implemented using a method by which the computer of the system or device, for example, reads and executes the computer-executable instructions from the storage medium to perform one or more functions in the above embodiments, and / or controls the one or more circuits to perform one or more functions in the above embodiments. The computer may include one or more processors (e.g., central processing unit (CPU), microprocessor unit (MPU)) and may include separate computers or a network of separate processors to read and execute the computer-executable instructions. The computer-executable instructions may be provided to the computer, for example, from a network or the storage medium. The storage medium may include, for example, a hard disk, random access memory (RAM), read-only memory (ROM), the memory of a distributed computing system, an optical disc (such as a compact disc (CD), a digital versatile disc (DVD), or a Blu-ray disc). TM One or more of the following: (BD), flash memory devices, and memory cards.

[0248] Embodiments of the present invention can also be implemented by providing software (including computer program products of computer programs) that performs the functions of the above embodiments to a system or device via a network or various storage media, and the computer (central processing unit (CPU) or microprocessor unit (MPU) of the system or device) reads and executes the computer program.

[0249] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The appended claims should be interpreted in the broadest possible sense to encompass all such variations and equivalent structures and functions.

Claims

1. An image forming system comprising: Sheet holding device; as well as An image forming apparatus configured to form an image on a sheet conveyed from a sheet holding unit of the sheet holding apparatus. The sheet holding device includes a display unit, and The display unit is configured to issue a notification using a first notification method when the amount of sheet held in the sheet holding unit decreases to a first amount before the completion of the operation, and to issue a notification using a second notification method when the amount of sheet held in the sheet holding unit decreases to a second amount less than the first amount before the completion of the operation.

2. The image forming system according to claim 1, further comprising: Multiple sheet holding devices, including the sheet holding device, Each of the plurality of sheet holding devices includes a display unit, and The display unit of each of the plurality of sheet holding devices is configured to issue a notification using the first notification method if the amount of sheet held in the sheet holding unit decreases to the first amount before the completion of the operation.

3. The image forming system according to claim 1, wherein, The display unit is configured to issue a notification using the first notification method when a warning display time is reached, the warning display time being determined with reference to the time when the amount of sheet held in the sheet holding unit decreases to the first amount and a sheet shortage occurs.

4. The image forming system according to claim 1, in, The sheet holding device further includes: a plurality of sheet holding units including the sheet holding unit. The sheet holding device further includes: other display units on the plurality of corresponding sheet holding units, and The other display units of the plurality of corresponding sheet holding units are configured to issue a notification based on an error in the plurality of corresponding sheet holding units.

5. The image forming system according to claim 4, wherein, If the amount of sheet held in the sheet holding unit decreases to the first amount before the completion of the operation, the display unit and another display unit of another sheet holding unit holding the same sheet issue a notification using the first notification method.

6. The image forming system according to claim 4, wherein, The error is overload.

7. The image forming system according to claim 4, wherein, The error is a failure of the instruction unit configured to open the sheet holding unit.

8. The image forming system according to any one of claims 1 to 7, wherein, The display unit is a light-emitting diode (LED).

9. The image forming system according to claim 8, in, The first notification method is a method for illuminating the LED in a first color, and The second notification method is a method for illuminating the LED with a second color different from the first color.

10. A control method for an image forming system, the image forming system comprising a sheet holding device and an image forming device, the image forming device being configured to form an image on a sheet conveyed from a sheet holding unit of the sheet holding device, the control method comprising: If the amount of sheet held in the sheet holding unit decreases to a first amount before the completion of the operation, the display unit of the sheet holding unit issues a notification using a first notification method. as well as If the amount of sheet held in the sheet holding unit decreases to a second amount less than the first amount before the completion of the operation, the display unit issues a notification using a second notification method.

11. A computer-readable storage medium storing a program for causing a computer to perform a control method for an image forming system, the image forming system including a sheet holding device and an image forming device, the image forming device being configured to form an image on a sheet conveyed from a sheet holding unit of the sheet holding device, the control method comprising: If the amount of sheet held in the sheet holding unit decreases to a first amount before the completion of the operation, the display unit of the sheet holding unit issues a notification using a first notification method. as well as If the amount of sheet held in the sheet holding unit decreases to a second amount less than the first amount before the completion of the operation, the display unit issues a notification using a second notification method.

Images