Image forming system

Abstract

The present application provides an image forming system including: an image forming unit configured to execute an image forming process for forming an image on a plurality of types of recording media including a first type of recording medium having a coating layer and a second type of recording medium not having a coating layer; a varnish applying unit configured to execute a varnish applying process for applying a varnish to a recording medium on which an image is formed by the image forming unit; a receiving unit configured to receive an instruction for selecting a recording medium and receive an instruction for the varnish applying process; and a control unit configured to execute control to prevent the receiving unit from receiving an instruction to execute the varnish applying process on the second type of recording medium.

Description

Technical Field

[0001] The present invention relates to an image forming system for applying a varnish to a recording medium on which a toner image has been formed. Background Technology

[0002] Typically, electrophotographic image forming apparatuses are equipped with multiple sheet feed cassettes from which recording media are fed, and can arbitrarily select from recording media of various sizes and types to perform printing.

[0003] Therefore, in recent years, by utilizing the ability to perform small-batch printing and the characteristics of variable printing, electrophotographic image forming devices have been introduced into offset printing machines and have become the mainstream product in the market.

[0004] Furthermore, in the recent product market, in order to give the surface of the recording medium a glossy finish, and to protect and / or decorate the surface of the recording medium, a surface treatment using a varnish mainly composed of a resin and solvent medium is performed on the recording medium on which an image is formed by an image forming apparatus (Japanese Patent Application Publication No. 2007-176044).

[0005] Meanwhile, in recent years, an image forming system has been proposed, which includes a post-processing unit connected to an image forming apparatus that forms an image on a recording medium, and continuously performs a series of processes from image forming to post-processing on the recording medium to achieve in-line printing. As a post-processing unit connected to the image forming apparatus, a varnish application device is considered, which performs the aforementioned surface treatment using varnish.

[0006] However, the surface treatment using varnish performed by the varnish application device is not always applicable to all recording media for which image forming processing is performed by the image forming processing device. Therefore, there are situations where, if a recording medium for which varnish cannot be easily applied by the varnish application device is supplied from the image forming device to the varnish application device, the surface treatment of the recording medium cannot be adequately performed, and the product desired by the user cannot be obtained. Summary of the Invention

[0007] Therefore, the present invention relates to an image forming system that performs an online varnish application process on a recording medium for forming an image by an image forming apparatus, and is able to prevent situations where the product desired by the user cannot be obtained.

[0008] According to one aspect of the present invention, an image forming system is provided, comprising: an image forming unit configured to perform image forming processing for forming an image on a plurality of types of recording media, the plurality of types of recording media including a first type of recording media having a coating layer and a second type of recording media not having a coating layer; a varnish applying unit configured to perform a varnish applying processing for applying a varnish to the recording media on which the image is formed by the image forming unit; a receiving unit configured to receive instructions for selecting a recording medium and instructions for the varnish applying processing; and a control unit configured to perform control to prevent the receiving unit from receiving instructions to perform the varnish applying processing on the second type of recording medium.

[0009] Other features of the invention will become clear from the following description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0010] Figure 1 This is a schematic diagram illustrating an example of an image forming apparatus according to an exemplary embodiment.

[0011] Figure 2 This is a control block diagram showing the control unit.

[0012] Figure 3 This is a table showing the evaluation results of the adhesion of the varnish layer to the sheet.

[0013] Figure 4 This is a flowchart illustrating the control process according to a first exemplary embodiment.

[0014] Figure 5 This is a diagram showing the print settings screen displayed on the operating unit.

[0015] Figures 6A to 6E This is a diagram showing the sheet setup screen displayed on the operation unit.

[0016] Figure 7 This is a flowchart illustrating the control process according to a second exemplary embodiment.

[0017] Figure 8 This is a table showing the evaluation results of the sheet curling amount and basis weight.

[0018] Figure 9 This is a flowchart illustrating the control process according to a third exemplary embodiment.

[0019] Figure 10A , Figure 10B and Figure 10C This is a diagram showing a setup screen displayed on the operation unit according to a third exemplary embodiment. Detailed Implementation

[0020] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] However, the description of the dimensions, medium, shape, and relative arrangement of components in this exemplary embodiment is not intended to limit the scope of the invention, unless such limitation is expressly stated herein.

[0022] First, refer to Figure 1 and Figure 2 The construction of an image forming system 1000 according to a first exemplary embodiment is described. In the image forming system 1000 according to this exemplary embodiment, an image forming apparatus 100 that forms a toner image on a recording medium S is connected to a varnish application apparatus 200, which applies varnish to the recording medium S on which the toner image has been fixed by the image forming apparatus 100.

[0023] The image forming apparatus 100 and the varnish application apparatus 200 are connected in series with each other, such that the varnish application apparatus 200 can apply varnish to the recording medium conveyed from the image forming apparatus 100. In other words, the varnish application process can be performed on the recording medium before it is discharged from the outside of the image forming system 1000.

[0024] Image forming apparatus

[0025] Figure 1 The image forming apparatus 100 shown is a tandem full-color electrophotographic printer. The image forming apparatus 100 includes image forming sections Pa, Pb, Pc, and Pd for forming yellow, magenta, cyan, and black images, respectively. The image forming apparatus 100 is based on an external device 91 ( Figure 2 Image signals received by a personal computer (such as a document reader (not shown) or image forming apparatus 100) are used to form a toner image on the recording medium S.

[0026] In this exemplary embodiment, the image forming sections Pa to Pd, the primary transfer rollers 24a to 24d, the intermediate transfer belt 130, the plurality of rollers 13 to 15, and the secondary transfer outer roller 11 constitute the image forming unit 300 for forming a toner image on the recording medium S. Furthermore, various types of sheet media (e.g., paper such as plain paper, thick paper, rough paper, embossed paper, recycled paper, and coated paper, plastic film (resin medium), and fabric) can be considered as examples of the recording medium S on which the image forming apparatus 100 can perform image forming processing. Coated paper, which may include enamel, glossy coating, and smooth paper media, may include a layer coated with a mixture of materials or polymers to impart predetermined qualities to the paper, for example. Paper that does not include such a coating layer or includes a layer that does not meet predetermined requirements can be referred to as paper without a coating layer.

[0027] like Figure 1 As shown, image forming portions Pa, Pb, Pc, and Pd are arranged adjacent to each other in the moving direction of the intermediate transfer belt 130. The intermediate transfer belt 130 is stretched by a plurality of rollers 13, 14, and 15 and moves in the direction indicated by arrow R2. The intermediate transfer belt 130 carries and transports the toner image transferred thereon. The secondary transfer outer roller 11 is arranged opposite to the secondary transfer inner roller 14, with the intermediate transfer belt 130 between the secondary transfer outer roller 11 and the secondary transfer inner roller 14 that stretches the intermediate transfer belt 130, such that the secondary transfer inner roller 14 and the secondary transfer outer roller 11 form a secondary transfer portion T2 for transferring the toner image carried on the intermediate transfer belt 130 onto the recording medium S. The fixing device 8 is arranged downstream of the secondary transfer portion T2 in the transport direction of the recording medium S.

[0028] The cartridge 10 storing the recording medium S is arranged at the lower part of the image forming apparatus 100. The recording medium S is conveyed from the cartridge 10 toward the registration roller 12 by the transport roller 16. Thereafter, the registration roller 12 begins to rotate synchronously with the transport of the toner image formed on the intermediate transfer belt 130 through a process described below, such that the recording medium S is conveyed to the secondary transfer section T2. ​​Although in Figure 1 Only one cartridge 10 is shown, but the image forming apparatus 100 may include multiple cartridges 10 capable of storing recording media S of different sizes and thicknesses. In this case, the recording media S is selectively fed from any of the multiple cartridges 10. In addition to the recording media S stored in the cartridges 10, recording media S placed on a manual sheet feed unit (not shown) or stored in a container device connected externally to the image forming apparatus 100 may also be fed.

[0029] Apart from performing development by using different colors, the four image forming portions Pa, Pb, Pc, and Pd included in the image forming apparatus 100 have essentially the same structure. Therefore, the yellow image forming portion Pa is described as a representative example, while the descriptions of the other image forming portions Pb, Pc, and Pd are omitted.

[0030] A cylindrical photosensitive drum 3a, serving as the photosensitive element, is arranged on the image forming section Pa. The photosensitive drum 3a is driven to rotate in the direction indicated by arrow R1. A charging device 2a, an exposure device La, a developing device 1a, a primary transfer roller 24a, and a drum cleaning device 4a are arranged in the peripheral area of ​​the photosensitive drum 3a.

[0031] For example, a process for forming a panchromatic image using an image forming apparatus 100 will be described. When the image forming process begins, firstly, the surface of a rotating photosensitive drum 3a is uniformly charged by a charging device 2a. The charging device 2a is, for example, a corona charger, which uses charged particles to irradiate the photosensitive drum 3a through corona discharge and uniformly charges the photosensitive drum 3a with a negative dark potential. Then, the photosensitive drum 3a is exposed to and scanned by a laser emitted by an exposure device La in response to an image signal. Through this process, an electrostatic latent image based on the image signal is formed on the surface of the photosensitive drum 3a. Using a developer containing toner and a carrier stored in a developing apparatus 1a, the electrostatic latent image formed on the photosensitive drum 3a is developed into a visible toner image. In this exemplary embodiment, each of the developing apparatuses 1a to 1d uses a two-component developer containing a non-magnetic toner and a magnetic carrier.

[0032] The toner image formed on the photosensitive drum 3a is transferred to the intermediate transfer belt 130 at the primary transfer section T1 formed between the photosensitive drum 3a and the primary transfer roller 24a. The primary transfer roller 24a is arranged opposite to the photosensitive drum 3a with the intermediate transfer belt 130 positioned between the primary transfer roller 24a and the photosensitive drum 3a. At this time, a primary transfer bias is applied to the primary transfer roller 24a. The toner remaining on the surface of the photosensitive drum 3a after the transfer process on the intermediate transfer belt 130 is removed by the drum cleaning device 4a.

[0033] The image forming sections Pa to Pd for yellow, magenta, cyan, and black are sequentially processed as described above, with the toner images of the four colors overlapping each other on the intermediate transfer belt 130. Then, at a timing adjusted for toner image formation, the recording medium S stored in cartridge 10 is conveyed to the secondary transfer section T2. ​​A secondary transfer bias is then applied to the secondary transfer outer roller 11, causing the full-color toner images formed on the intermediate transfer belt 130 to be collectively transferred to the recording medium S. The toner remaining on the intermediate transfer belt 130 after the transfer process on the recording medium S is removed by the belt cleaning device 22.

[0034] Subsequently, the recording medium S, with the toner image transferred onto it, is conveyed to the fixing device 8. While clamping and conveying the recording medium S, the fixing device 8 applies heat and pressure to the recording medium S carrying the toner image, and melts and fixes the toner onto the recording medium S at the fixing clamping portion T3. In other words, the toner that forms the toner image on the recording medium S is melted and mixed by the applied heat and pressure, and then the toner image is fixed onto the recording medium S as a full-tone toner image. This concludes the series of image forming processes.

[0035] The image forming apparatus 100 according to this exemplary embodiment can perform duplex printing. In the case of single-sided printing, the recording medium S, having passed through the fixing device 8, is discharged through the discharge transport path 31 and exited from the image forming apparatus 100. On the other hand, in the case of duplex printing, the recording medium S, having passed through the fixing device 8, is transported to the transport path 32 and then conveyed to the reversal path 33. The recording medium S conveyed to the reversal path 33 is reversed and transported to the duplex transport path 34, causing the recording medium S to be reversed. The reversed recording medium S is transported to the registration roller 12 through the duplex transport path 34. Then, through a series of processes similar to those performed when forming a toner image on one side of the recording medium S, a toner image is formed on the other side of the recording medium S. After the toner image is fixed to both sides of the recording medium S, the recording medium S is discharged through the discharge transport path 31 and exited from the image forming apparatus 100.

[0036] Here, a developer for developing an electrostatic latent image formed on a photosensitive drum 3a into a toner image is described. In this exemplary embodiment, a two-component developer comprising a toner and a carrier is used. The toner has a low melting point and comprises a binder resin, a colorant, and a release agent (e.g., wax).

[0037] Varnish application device

[0038] like Figure 1 As shown, according to this exemplary embodiment, a varnish application device 200, serving as a surface treatment apparatus, is connected to the image forming apparatus 100. The varnish application device 200 can be freely connected to the image forming apparatus 100 as one of the add-on peripheral devices (also referred to as "option units") to expand the functionality of the image forming system 1000. To give the surface of the recording medium S a glossy finish and to protect the surface of the recording medium S to add value, the varnish application device 200 performs surface treatment by applying varnish to coat the entire surface of the recording medium S discharged from the image forming apparatus 100.

[0039] The varnish application device 200 does not need to be directly connected to the image forming device 100, and can be constructed as an online image forming system, wherein at least one processing device such as an inserter or a stacker is arranged between the image forming device 100 and the varnish application device 200.

[0040] The varnish application apparatus 200 described above will be described. The varnish application apparatus 200 includes: a tank (not shown) for storing varnish; a supply unit (not shown) for supplying varnish from the tank to an application roller 201; an application roller 201; and a reverse roller 202 disposed opposite to the application roller 201, the application roller 201 and the reverse roller 202 forming a varnish application clamping portion T4 where varnish is applied to the recording medium S. The varnish application apparatus 200 also includes a pressure mechanism (not shown) for pushing the application roller 201 and the reverse roller 202 against each other; and an ultraviolet lamp 203 for curing the varnish applied to the recording medium S.

[0041] The varnish application device 200 then includes a transport path branching into a varnish application route 205 as a first transport path (through which varnish is applied to the recording medium S) and a varnish bypass route 204 as a second transport path (through which varnish is applied to the recording medium S), and the transport path of the recording medium S is switched between route 205 and route 204. In other words, by switching the baffle 206, the varnish application device 200 transports the recording medium S to the varnish application route 205 when performing varnish application processing, and to the varnish bypass route 204 when not performing varnish application processing. Ultraviolet (UV) varnish that utilizes ultraviolet light curing can be used according to the texture desired by the user.

[0042] The application roller 201 is sized such that varnish supplied from a can (not shown) can be applied to approximately the entire width of the recording medium S, orthogonal to the transport direction of the recording medium S. An ultraviolet lamp 203 hardens the varnish applied to the recording medium S by emitting ultraviolet light with a wavelength suitable for hardening the varnish. Similar to the application roller 201, the ultraviolet lamp 203 can emit UV light onto approximately the entire width of the recording medium S. The ultraviolet lamp 203 is turned on only when performing the varnish application process.

[0043] For example, instead of using a roller system including an application roller 201 and a reverse roller 202, a jet-type line head can be used as the unit for applying varnish to the recording medium S. With a line head, the varnish can be applied to a selectable location on the recording medium S, rather than its entire surface. Therefore, by using a line head, images of lines, symbols, or characters can be formed with the varnish. Furthermore, although UV varnish is used in this exemplary embodiment, oil-based or water-based varnish can also be used. When using oil-based or water-based varnish, an infrared (IR) lamp is preferably used as the drying unit for drying the varnish instead of the ultraviolet lamp 203. Additionally, the varnish can be dried using warm air, or a combination of an IR lamp and a gas such as warm air.

[0044] Control Unit

[0045] The image forming apparatus 100 includes a control unit 80. (Refer to...) Figure 2 To describe control unit 80. Besides Figure 2 In addition to the devices shown, various other devices (such as motors and power supplies for the operation of the image forming apparatus 100) are also connected to the control unit 80. However, since they are not key features of the invention, descriptions of them will be omitted.

[0046] The control unit 80, which serves as a control unit, performs various types of control over the image forming apparatus 100, such as image forming processing. The control unit 80 includes a central processing unit (CPU) 81, random access memory (RAM) 82, and read-only memory (ROM) 83. For example, the ROM 83 stores various programs and data for controlling the image forming system 1000. The CPU 81 executes various programs stored in the ROM 83 to cause the image forming apparatus 100 and the varnish application device 200 to perform processing.

[0047] According to this exemplary embodiment, as described below, the CPU 81 controls the temperature of the fixing roller 40 and the pressure roller 41 included in the fixing device 8. The RAM 82 stores working data and input data. Furthermore, the RAM 82 can temporarily store the results of computational processing performed in association with the execution of various programs.

[0048] In addition to RAM 82 and ROM 83, the input / output interface unit (hereinafter referred to as the "I / F unit") 85, the varnish application device control unit 86, the input receiving unit 87, the temperature detection unit 88, and the motor control unit 90 are also connected to the CPU 81 via bus 84. The CPU 81 can receive print signals from the operation unit 95 via the I / F unit 85, which serves as an example of a receiving unit. The print signals are generated according to the processing content set by the user and include various types of information, such as whether various types of processing (such as image forming processing and varnish application processing) are executed or not, the amount of sheet to be processed, and the type of recording medium S to be subjected to various types of processing.

[0049] The operation unit 95 includes a touch panel display capable of key input and display. The operation unit 95 receives instructions to execute various programs (such as image forming processing) and various types of data input by the user. The I / F unit 85 receives print signals based on input from the user via the operation unit 95. For example, the operation unit 95 appropriately displays various screens, such as a display screen showing the operating status of the image forming apparatus 100 or the varnish application apparatus 200, and a menu screen providing various executable programs.

[0050] In this exemplary embodiment, when a user inputs an instruction to perform an image forming job, the user can input information regarding whether to perform the printing process in color or monochrome mode and the type of recording medium S, as well as information regarding whether to perform a varnish application treatment to treat the surface of the recording medium S with varnish. The operation unit 95 may include hardware keys and a display. Alternatively, a display device of an external device 91 (such as a personal computer connected to the operation unit 95 via a wired or wireless communication network) may be used as the operation unit 95.

[0051] The CPU 81 can acquire image signals and various types of data from the external device 91 via an input receiving unit 87, which is an example of a receiving unit. In this exemplary embodiment, when an instruction to perform an image forming operation is received from the external device 91, the CPU 81 can also acquire information about whether to perform a varnish application process. Although not shown, the image forming apparatus 100 ( Figure 1 The system includes a document reading device. The CPU 81 can also acquire image signals of the document read by the document reading device via the input receiving unit 87. The acquired image signals are stored as image data in RAM 82.

[0052] Temperature detection unit 88 detects the temperatures of fixing roller 40 and pressure roller 41 based on the detection results of thermistors 42a and 42b. CPU 81 controls heater control unit 89 based on the temperatures detected by temperature detection unit 88. Heater control unit 89 controls heaters 40a and 41a to adjust the temperatures of fixing roller 40 and pressure roller 41 to target temperatures. In this exemplary embodiment, as the target temperature for fixing the toner image to the recording medium S, for example, CPU 81 causes heater control unit 89 to control heater 40a to adjust the surface temperature of fixing roller 40 to a desired temperature in the range of 140°C to 190°C. In order to properly fix the toner image to the recording medium S and make the fixed toner image glossy, the target temperature of fixing roller 40 is set to a predetermined temperature depending on the type and basis weight of recording medium S. On the other hand, CPU 81 causes heater control unit 89 to control heater 41a to maintain the surface temperature of pressure roller 41 at, for example, 100°C to 120°C.

[0053] The motor control unit 90 controls the rotation of the motor 92. The CPU 81 controls the rotation speed of the fixing roller 40 via the motor control unit 90 to adjust the transport speed of the recording medium S in the fixing device 8 when the toner image is fixed to the recording medium S.

[0054] The varnish application device control unit 86 controls the varnish application device 200 connected to the image forming apparatus 100. The CPU 81 controls the varnish application device 200 by sending and receiving electrical signals via the bus 84. Therefore, if it is impossible to send and receive electrical signals between the image forming apparatus 100 and the varnish application device 200 via the bus 84, the CPU 81 can determine that the image forming apparatus 100 and the varnish application device 200 are not connected to each other.

[0055] In this exemplary embodiment, a configuration has been described in which the image forming apparatus 100 includes a varnish application device control unit 86. However, the configuration is not limited thereto. For example, the varnish application device control unit 86 may be arranged on the varnish application device 200 and may be configured to communicate with the CPU 81 to electrically connect the varnish application device 200 to the image forming apparatus 100.

[0056] The drive control unit 96 performs transport control by controlling transport units such as the transport roller 16 and the registration roller 12 of the image forming apparatus 100. Furthermore, the drive control unit 96 performs controls related to image processing. The drive control unit 96 also controls a drive motor (not shown) included in the image forming apparatus 100 to rotatably drive the image forming sections Pa, Pb, Pc, and Pd, as well as the intermediate transfer belt 130.

[0057] In the configuration described in this exemplary embodiment, the drive control unit 96 performs control over the transport and image forming processes in the image forming apparatus 100. However, the control operation may be performed by multiple separate control units.

[0058] Evaluation of the adhesion of the varnish layer to the sheet material

[0059] Next, the evaluation of the adhesion of the varnish layer to the sheet will be described. Various sheets that have undergone varnish application treatment will be used to evaluate the adhesion of the varnish layer to the sheet. The evaluation of the adhesion of the varnish layer to the sheet can be based on the evaluation of the coating material's resistance to the scratch effect caused by pencil sliding at various hardnesses (e.g., H to >6H) (film hardness). Here, the evaluation of the adhesion of the varnish layer to the sheet will be performed according to the standardized test method—scratch hardness (pencil method) specified in Japanese Industrial Standard (JIS) K5600-5-4.

[0060] As uncoated plain paper and thick paper (uncoated paper), it uses paper with a basis weight of 52.3 g / m³ manufactured by Oji Paper Co., Ltd. 2 64g / m 2 81.4g / m 2 104.7g / m 2 127.9g / m 2 157g / m2 and 209.3g / m 2 "OK Prince High-Quality Paper". As a coated paper, it uses paper manufactured by Prince F-Tex Co., Ltd. with a basis weight of 52.3 g / m². 2 The "View Hi-Corona A" manufactured by Oji Paper Co., Ltd. has a basis weight of 73.3 g / m³. 2 84.9g / m 2 104.7g / m 2 127.9g / m 2 and 157g / m 2 The "OK Top Coat Plus" and the 200g / m³ weight of the top coat manufactured by UPM-Kymmene. 2 The "UPM Finesse Gloss" is a synthetic paper manufactured by Yupo Corporation with a basis weight of 51.4 g / m². 2 73.2g / m 2 84.7g / m 2 100.1g / m 2 115.5g / m 2 158g / m 2 and 200g / m 2 The "New Yupo" is used as the resin medium. Furthermore, a resin with a basis weight of 144 g / m³ manufactured by Kokuyo Co., Ltd. is used. 2 The “VF-1420N” and the 0.125mm thick (basic weight 180g / m³) manufactured by Foles Ltd. 2 ) and a thickness of 0.180mm (basic weight of 250g / m³) 2 The above-mentioned coated paper has a coating weight of 20 g / m². 2 Up to 40g / m 2 The recording medium with a coating layer.

[0061] Here, for a reference sample obtained by applying the varnish used for evaluation to a glass plate without forming a toner image and allowing the varnish to harden, the aforementioned scratch hardness of the reference sample is measured, and the measurement result indicates a hardness of "6H". Therefore, in this evaluation, the acceptable level is defined as a scratch hardness greater than or equal to "6H". Figure 3 The measurement results are shown. For example... Figure 3 As shown, for coated paper, synthetic paper, and resin media, the scratch hardness is greater than or equal to "6H". However, for plain paper and thick paper, the scratch hardness is less than or equal to "3H", and does not meet the "6H" requirement.

[0062] Each of the aforementioned coated paper, synthetic paper, and resin media contains a coating layer on its surface, thus the varnish does not easily penetrate into the recording medium S. Therefore, when the varnish (UV varnish) is applied to the recording medium S via the application roller 201, the varnish tends to remain on the surface of the recording medium S. In the evaluation, the scratch hardness of the varnish applied to each of the coated paper, synthetic paper, and resin media showed a value greater than or equal to "6H". This can be attributed to the accumulation of varnish on the surface of the recording medium S, and the sufficient curing of the varnish accumulated on the recording medium S by ultraviolet light emitted by the UV lamp 203.

[0063] Furthermore, neither of the aforementioned plain paper nor thick paper has a coating layer on its surface. Therefore, when the varnish (UV varnish) is applied by the application roller 201, the varnish can easily penetrate into the recording medium S. In the evaluation, the scratch hardness of the varnish applied to the plain paper and thick paper was less than or equal to "3H". This can be attributed to the fact that the varnish cannot sufficiently harden because the UV light emitted from the UV lamp 203 cannot reach the interior of the recording medium S.

[0064] Based on the above evaluation results, it was found that when using uncoated paper (such as plain paper or thick paper without a coating) as the recording medium S, varnish is difficult to adhere to the recording medium S and easily peels off. It was also found that, compared to recording media with a coating (such as coated paper), uncoated paper is less likely to achieve the three-dimensionality and gloss that varnish can impart, because varnish easily penetrates into the uncoated paper. Therefore, even if varnish treatment is applied to uncoated paper, it may not be possible to obtain the product that the user expects.

[0065] However, all of the aforementioned uncoated papers (such as plain paper and thick paper), coated papers, synthetic papers, and resin media are recording media on which the image forming apparatus 100 can form images. Therefore, the user may mistakenly issue a command to apply a varnish to plain paper or thick paper. Consequently, if the image forming system 1000 applies a varnish to uncoated paper, the varnish may easily peel off, or the desired three-dimensional effect or gloss may not be achieved. Therefore, the product the user expects may not be obtained.

[0066] Therefore, in this exemplary embodiment, when the user makes printing settings, the image forming system 1000 prevents the application of varnish to uncoated paper without a coating layer to prevent the user from being unable to obtain the desired product.

[0067] Control by the image forming system

[0068] Subsequently, the operation and control performed by the image forming system 1000 according to this exemplary embodiment will be described with reference to the flowchart. Figure 4This is a flowchart illustrating the control processing performed by the image forming system 1000.

[0069] When a print signal is received in standby mode after the entire image forming system 1000 has been adjusted, the print process begins. Figure 4 The control processing in the process. Here, standby state refers to the state where the temperature of the fixing device 8 has reached a predetermined temperature for fixing the toner image and the state where the image forming device 100 can quickly form an image on the recording medium when it receives a print signal. Standby state also refers to the state where varnish is supplied to the application roller 201 and the irradiation power of the ultraviolet lamp 203 reaches a predetermined irradiation power and the varnish application device 200 can apply varnish to the recording medium and allow the applied varnish to harden.

[0070] In this exemplary embodiment, a description is given of the case where the user performs print settings via the operation unit 95; however, similar control processing may also be performed when the user performs print settings using an external device 91.

[0071] When setting up printing using the external device 91, the display screen described below is displayed on the display unit arranged on the external device 91.

[0072] When the user operates the operation unit 95, the CPU 81 can execute a print setting mode for performing settings related to image forming processing and other processing. This print setting mode is executed when the user presses a software key such as "Print Settings" displayed on the operation unit 95.

[0073] In step S101, it is determined whether the user has executed the print setup mode. If the user has executed the print setup mode (yes in step S101), the process proceeds to step S102. In step S102, the CPU 81 displays the print setup screen on the operation unit 95. Figure 5 An example of a print settings screen is shown. Figure 5 In the print settings screen, software keys such as "Sheet Settings," "Magnification," "Duplex," "Original Type," "Select Color," "Density," "Finish," and "Apply Varnish" are displayed on the operation unit 95. Users can input detailed settings for the items indicated by each software key by operating these keys. Furthermore, additional settings can be arranged on this unit. Figure 5 The software keys shown are different selection keys.

[0074] If no instruction to execute the print setup mode is received (No in step S101), the CPU 81 waits until the instruction to execute the print setup mode is received, and the image forming system 1000 remains in standby mode.

[0075] Next, in step S103, CPU 81 determines whether to press the "Apply varnish" software key on the print settings screen.

[0076] If no setting for "apply varnish" is received (No in step S103), the process proceeds to step S104. In step S104, the CPU 81 displays a sheet selection screen for image forming processing on the operation unit 95. Furthermore, if in step S103 the CPU 81 determines that no setting for varnish application processing has been received, and only a setting for image forming processing has been received, the process proceeds to step S104.

[0077] Figure 6A An example of a sheet selection screen used for image forming processing is shown. For example... Figure 6A As shown, all recording media that can be supplied by the image forming apparatus 100 are displayed in a selectable state on the sheet selection screen for image forming processing, and the type of recording media that can be selected is not limited. In other words, the user can select from... Figure 6A The film selection screen displays any of the various types of recording media.

[0078] Although the image forming apparatus 100 described in this exemplary embodiment includes four cartridges storing different recording media, its construction is not limited thereto. For example, when a container device is connected to the image forming apparatus 100 as an optional device, a software key corresponding to the recording medium stored in the container device can be attached and displayed. Figure 6A The selection screen for film.

[0079] Users can operate Figure 6A In the film selection screen, select any software key corresponding to the recording medium to input settings related to the recording medium to be used for image forming processing.

[0080] On the other hand, if a "Apply varnish" setting is received (Yes in step S103), the process proceeds to step S105. In step S105, the CPU 81 displays a sheet selection screen for varnish application processing on the operation unit 95.

[0081] Figure 6B An example of a sheet selection screen for applying varnish is shown. Figure 6BAs shown, in the sheet selection screen for varnish application processing, only recording media for which the varnish application device 200 can perform varnish application processing are displayed as selectable. Recording media for which the varnish application device 200 can perform varnish application processing refers to coated paper having a coating layer on its surface. As described above, in this exemplary embodiment, ordinary paper, thick paper, rough paper, embossed paper, recycled paper, and fabric are identified as uncoated paper. Furthermore, coated paper, resin media (such as OHT sheets and films mainly composed of plastic films), and synthetic paper are identified as coated paper. In this exemplary embodiment, coated paper, resin media (such as OHT sheets and films mainly composed of plastic films), and synthetic paper are examples of the first type of recording media, while ordinary paper, thick paper, rough paper, embossed paper, recycled paper, and fabric are examples of the second type of recording media. In this exemplary embodiment, based on the results of the above tests, a coating weight of 20 g / m³ is selected. 2 Up to 40g / m 2 Paper with a coating layer is defined as coated paper. Furthermore, paper with a coating weight of 12 g / m² is also considered coated paper. 2 Or 15g / m 2 Recording media with a coating layer can also be used as coated paper, as long as the varnish does not seep into the recording medium.

[0082] Users can operate Figure 6B Use any software key displayed on the film selection screen that corresponds to the recording medium to input the type of recording medium for which image forming processing and varnish application processing are to be performed.

[0083] In this exemplary embodiment, as Figure 6B As shown, to prevent the application of varnish to recording media other than coated paper, only recording media with a coating layer (i.e., coated paper) are displayed in an selectable state. Therefore, in Figure 6B From Figure 6A The recording medium supplied by the image forming apparatus 100 can hide options other than coated paper. In this exemplary embodiment, although a sheet selection screen is described for the case where the image forming apparatus 100 stores only one type of coated paper, if the image forming apparatus 100 stores multiple types of coated paper, then... Figure 6B The film selection screen can display various types of recording media.

[0084] Furthermore, the sheet selection screen can have other configurations, as long as a recording medium with only a coated layer (i.e., coated paper) can be displayed on and selected from the sheet selection screen. For example, such as Figure 6C As shown, the software keys corresponding to uncoated paper can be displayed in a lighter color than those used to display the software keys corresponding to coated paper. Furthermore, as... Figure 6DAs shown, the software keys corresponding to uncoated paper can be darkened or shadowed using halftone dots, making them less visible than those corresponding to coated paper. Furthermore, as... Figure 6E As shown, software keys corresponding to recording media other than coated paper can be displayed, allowing the user to identify those software keys that are unavailable. Figures 6C to 6E In the display shown, the software key corresponding to uncoated paper is displayed in a grayed-out state.

[0085] Furthermore, a software key corresponding to the manual sheet feeding unit (not shown) is displayed in an selectable state on the sheet selection screen because the user can place the coating paper on it. However, if the image forming apparatus 100 does not have a manual sheet feeding unit, it is not necessary to display the software key corresponding to the manual sheet feeding unit.

[0086] As described above, according to this exemplary embodiment, the user in Figures 6A to 6E Input operations can be performed on any of the sheet selection screens shown, enabling the CPU 81 to receive settings for image forming processing or varnish application processing for the recording medium selected by the user.

[0087] Then, in step S106, CPU 81 determines whether the user has completed the sheet setting on the sheet selection screen displayed in step S104 or step S105. If the sheet setting is not completed (No in step S106), CPU 81 waits until the sheet setting is completed.

[0088] If the sheet setup is complete (Yes in step S106), the process proceeds to step S107. In step S107, the CPU 81 determines whether it has received instructions from the user via the operation unit 95 to perform the printing process in steps S101 to S106.

[0089] If no instruction to perform printing is received (No in step S107), the CPU 81 waits until such an instruction is received. The instruction to perform printing can be received when the user operates the start key, which is displayed as a software key on the operation unit 95 or as a hard key set on the operation unit 95.

[0090] If an instruction to perform printing processing is received (Yes in step S107), the process proceeds to step S108. In step S108, CPU 81 controls drive control unit 96 to perform image forming processing based on the information set in step S102. Here, CPU 81 feeds the recording medium set in step S105 from cartridge 10 or a separately provided device containing the recording medium, and performs image forming processing on the fed recording medium.

[0091] Then, in step S109, based on the processing information set in step S102, CPU 81 determines whether to apply varnish to the recording medium on which the image is formed in step S108.

[0092] Then, if a varnish application process (Yes in step S109) is to be performed, the process proceeds to step S110. In step S110, the CPU 81 causes the varnish application device control unit 86 to operate the baffle 206 to transport the recording medium S, to which the image forming process was performed in step S108, to the varnish application path 205. In step S111, the CPU 81 controls the varnish application device control unit 86 to perform a varnish application process on the recording medium transported to the varnish application path 205.

[0093] Subsequently, in step S112, CPU 81 determines whether all image forming processes and varnish application processes have ended. If not all processes have ended (no in step S112), the process returns to step S108, and CPU 81 performs processing on the next recording medium. In this way, by returning the process to step S108 after performing the varnish application process, CPU 81 can alternately output: the product obtained by performing the varnish application process on the recording medium S and the product obtained without performing the varnish application process.

[0094] On the other hand, if no varnish application process is performed on the recording medium S for which the image was formed in step S108 (No in step S109), the process proceeds to step S113. In step S113, the CPU 81 causes the varnish application device control unit 86 to operate the baffle 206 to transport the recording medium S for which the image was formed in step S108 to the varnish bypass route 204. Thereafter, in step S112, the CPU 81 determines whether all image forming processes and varnish application processes included in the print signals received in steps S101 to S106 have ended. If all processes have ended (Yes in step S112), the CPU 81 puts the image forming system 1000 into a standby state, and the process ends. If not all processes have ended (No in step S112), the process returns to step S108, and the CPU 81 performs processing on the next recording medium S.

[0095] As described above, when the user selects "Apply Clear Coating" during input operations related to print settings, the CPU 81 does not accept settings for uncoated paper on the sheet selection screen. In other words, when "Apply Clear Coating" is selected, the CPU 81 does not allow input for uncoated paper on the sheet selection screen.

[0096] This design prevents users from mistakenly entering instructions to apply varnish to uncoated paper. Therefore, it prevents situations where the desired product cannot be obtained due to varnish peeling or the inability to achieve the desired three-dimensionality and gloss.

[0097] Furthermore, it can prevent a decrease in workability caused by the following situation: after outputting a product obtained by applying varnish to uncoated paper, the user needs to output a product obtained by inputting processing information including new settings of the recording medium S to apply varnish to coated paper again.

[0098] Next, a second exemplary embodiment will be described. In the first exemplary embodiment described above, an example of setting the recording medium S by setting the sheet after performing a varnish application process was given. This exemplary embodiment differs from the first exemplary embodiment in that the user performs the varnish application process after performing the sheet setup. In the image forming system 1000 described below, the main components of the image forming apparatus 100 and the varnish application apparatus 200 are similar to those described in the first exemplary embodiment. Therefore, the same reference numerals are applied to them, and their descriptions are omitted.

[0099] In this exemplary embodiment, the user will specify the steps to be taken before selecting "Apply Clear Coat". Figure 5 The process is described in the case where "Sheet Setting" is selected on the print settings screen shown. In this exemplary embodiment, a description is given regarding the case where the user performs print settings via the operation unit 95; however, similar control processing can also be performed when the user performs print settings using the external device 91. When performing print settings using the external device 91, the display screen described below is displayed on the display unit arranged on the external device 91.

[0100] First, in step S201, the CPU 81 displays on the operation unit 95. Figure 6A The sheet selection screen shown. Figure 6A As shown, all recording media supplied by the image forming apparatus 100 can be displayed in a selectable state on the sheet selection screen displayed in step S201.

[0101] Then, in step S202, the CPU 81 determines whether the user has completed the sheet setting via the sheet selection screen displayed in step S201. If the sheet setting is not completed (No in step S202), the CPU 81 waits until the sheet setting is completed, keeping the image forming system 1000 in standby mode.

[0102] If the sheet setup is complete (Yes in step S202), the process proceeds to step S203. In step S203, CPU 81 displays again. Figure 5 The print settings screen in the browser, and receive other print settings.

[0103] Next, in step S204, the CPU 81 determines whether it has received an instruction from the user via the operation unit 95 to execute the printing process set in steps S201 to S203. If no instruction to execute the printing process is received (No in step S204), the CPU 81 waits until the instruction to execute the printing process is received. Furthermore, the instruction to execute the printing process can be received when the user operates the software key displayed on the operation unit 95 corresponding to the start key, or the hardware key arranged on the operation unit 95 corresponding to the start key.

[0104] If an instruction to perform printing processing is received (Yes in step S204), the process proceeds to step S205. In step S205, CPU 81 determines whether the "Apply Clear Coating" software key has been pressed on the print settings screen.

[0105] If the setting to "apply varnish" is received (Yes in step S205), the process proceeds to step S206. In step S206, the CPU 81 determines whether the type of recording medium set in step S201 is the aforementioned uncoated paper without a coating layer. If uncoated paper is selected (Yes in step S206), the process proceeds to step S207. In step S207, the CPU 81 displays on the operation unit 95. Figure 6B The screen shown is for selecting the sheet material for applying varnish, and prompts the user to reset the recording media. Figure 6B The settings in this example are similar to those described in the first exemplary embodiment, so their description is omitted.

[0106] Subsequently, in step S208, on the sheet selection screen for varnish application treatment displayed in step S207, CPU 81 determines whether the user has completed the setup of the new recording medium. If no new recording medium setup has been performed (No in step S208), CPU 81 waits until the setup of the new recording medium is completed. If a new recording medium setup has been performed (Yes in step S208), CPU 81 proceeds the process to step S209.

[0107] Furthermore, if no "apply varnish" setting is received (No in step S205), or if the coating paper is set to recording medium S (No in step S206), the CPU 81 also causes the process to proceed to step S209.

[0108] Then, in step S209, CPU 81 controls drive control unit 96 to deliver the recording medium set in step S201 or step S207 from cartridge 10 or a separately provided device containing the recording medium, and performs image forming processing on the delivered recording medium.

[0109] In step S210, based on the processing information set in the print settings screen, CPU 81 determines whether to apply varnish to the recording medium on which the image is formed in step S209.

[0110] Then, if a varnish application process is to be performed (as in step S210), the process proceeds to step S211. In step S211, the CPU 81 causes the varnish application device control unit 86 to operate the baffle 206 to transport the recording medium S, for which image forming processing was performed in step S209, to the varnish application path 205. In step S212, the CPU 81 controls the varnish application device control unit 86 to perform a varnish application process on the recording medium S transported to the varnish application path 205.

[0111] Subsequently, in step S213, CPU 81 determines whether all image forming processes and varnish application processes included in the print settings received in steps S201 to S208 have ended. If not all processes have ended (no in step S213), the process returns to step S209, and CPU 81 performs processing on the next recording medium S. In this way, by returning the process to step S208 after performing the varnish application process, CPU 81 can alternately output: the product obtained by performing the varnish application process on the recording medium S and the product obtained without performing the varnish application process.

[0112] On the other hand, if no varnish application process is performed on the recording medium for which the image was formed in step S209 (No in step S210), the process proceeds to step S214. In step S214, the CPU 81 causes the varnish application device control unit 86 to operate the baffle 206 to transport the recording medium for which the image forming process was performed in step S209 to the varnish bypass route 204. Thereafter, in step S213, the CPU 81 determines whether all image forming processes and varnish application processes included in the print settings received in steps S201 to S208 have ended. If all processes have ended (Yes in step S213), the CPU 81 puts the image forming system 1000 into a standby state, and the process ends. If not all processes have ended (No in step S213), the process returns to step S209, and the CPU 81 performs processing on the next recording medium.

[0113] In this exemplary embodiment, CPU 81 displays a sheet selection screen for varnish application treatment in step S207 and prompts the user to set a new recording medium. However, CPU 81 can... Figure 6B The film selection screen displays a "Cancel" software button to prompt the user to start the print settings from scratch.

[0114] As described above, when the user selects "Apply Clear Coating" after setting the uncoated paper on the sheet selection screen, the CPU 81 prompts the user to reset the recording medium. In other words, when "Apply Clear Coating" is selected, the CPU 81 does not allow input operations for uncoated paper on the sheet selection screen.

[0115] This design prevents users from mistakenly entering instructions to apply varnish to uncoated paper. Therefore, it prevents situations where the desired product cannot be obtained due to varnish peeling or the inability to achieve the desired three-dimensionality and gloss.

[0116] Furthermore, it can prevent a decrease in workability caused by the following situation: after outputting a product obtained by applying varnish to uncoated paper, the user needs to output a product obtained by inputting processing information including new settings of the recording medium S to apply varnish to coated paper again.

[0117] In addition, if in Figure 5 In the print settings screen, before selecting "Apply Clear Coating," select "Sheet Settings." Then, the CPU 81 can be based on... Figure 7 The flowchart in the process executes control, and if in Figure 5 In the print settings screen, before selecting "Sheet Settings," select "Apply Clear Coat," and then you can base it on... Figure 4 The flowchart in the process is executed and controlled.

[0118] Next, a third exemplary embodiment will be described. This exemplary embodiment differs from the exemplary embodiments described above in that the thickness of the varnish layer applied to the recording medium S can be varied by the varnish application device 200. In the image forming system 1000 described below, the main components of the image forming apparatus 100 and the varnish application device 200 are similar to those described in the first exemplary embodiment. Therefore, the same reference numerals are applied to them, and their descriptions are omitted.

[0119] The image forming system 1000 according to this exemplary embodiment differs from the structure of the first exemplary embodiment described above in that the thickness of the varnish layer applied to the recording medium S can be selectively changed. This configuration is achieved by changing the amount of varnish supplied to the application roller 201 by a supply unit (not shown) and the abutment pressure applied to the application roller 201 and the reverse roller 202 by a pressure applying mechanism (not shown). In this exemplary embodiment, for example, the supply unit and pressure applying mechanism of the varnish application device 200 can be configured such that the varnish thickness is 10 μm, 20 μm, or 30 μm. The varnish application device 200 changes the thickness of the varnish layer applied in the varnish application process based on processing information included in the print signal input by the user.

[0120] Figure 8 The measurement results of the curling amount of the sheet after the varnish application treatment are shown. The measurement results were obtained by applying varnish layers of different thicknesses to coated paper with different basis weights using the image forming system 1000 according to this exemplary embodiment to perform the varnish application treatment.

[0121] The sheet using coated paper (manufactured by Oji F-Tex Ltd., with a basis weight of 52.3 g / m²) 2 The "View Hi-Corona A" and the one manufactured by Oji Paper Co., Ltd. have a basis weight of 73.3 g / m 2 79.1g / m 2 84.9g / m 2 104.7g / m 2 and 127.9g / m 2 They used "OK Top Coat Plus" as the recording medium, and they were all A3-sized paper.

[0122] Based on the results of measuring the stiffness of the aforementioned recording media using the Gurley method as specified in "Test Methods for Pulp and Paper No. 40-83: Stiffness Test Method for Paper and Paperboard Using the Load Bending Method" published by the Japan Pulp and Paper Industry Technology Association (J.TAPPI), it was found that the stiffness of the recording media depends on its basis weight or thickness. In other words, the stiffness of the recording media can be estimated based on its basis weight or thickness.

[0123] The application thickness of the varnish is changed by adjusting the amount of varnish supplied to the application roller 201 and the contact pressure between the application roller 201 and the recording medium S.

[0124] After applying a varnish to the recording medium, the recording medium is placed on a flat plate (with the treated surface of the recording medium facing upwards), and the maximum value of the distance from the surface of the flat plate to the edge of the recording medium is obtained as the amount of curl of the recording medium.

[0125] Furthermore, in this exemplary embodiment, the maximum allowable curling amount is specified as "10 mm".

[0126] like Figure 8 As shown, when the varnish is applied to a thickness of 10 μm, the basis weight is 73.3 g / m. 2 Or, the curl of the coated paper should not exceed the maximum permissible curl. Furthermore, when the varnish is applied to a thickness of 20 μm or 30 μm, the basis weight is 79.1 g / m². 2 Or the amount of curling of the coated paper should not exceed the maximum allowable amount of curling.

[0127] In other words, if a varnish application process is performed on thin or low-stiffness coated paper, curling or undulations may occur in the recording medium due to shrinkage of the varnish layer when the varnish dries or hardens, depending on the thickness of the varnish layer. Such a recording medium with significant curling or undulations will degrade product quality. Furthermore, transport failures may occur due to curled recording media getting stuck in the transport path. Moreover, if other processes (such as binding or folding) are performed on the recording medium after the varnish application device 200 performs the varnish application process, these other processes may be unable to be performed due to curling generated in the recording medium. However, according to this exemplary embodiment, situations where users cannot obtain the desired product due to curling generated in the recording medium can be prevented.

[0128] Control by the image forming system

[0129] Subsequently, the operation and control performed by the image forming system 1000 according to this exemplary embodiment will be described with reference to the flowchart. Figure 9 This is a flowchart illustrating the control processing performed by the image forming system 1000 according to this exemplary embodiment.

[0130] When a print signal is received in standby mode after the entire image forming system 1000 has been adjusted, the print process begins. Figure 9 The control processing in the process. Here, standby state refers to the state where the temperature of the fixing device 8 has reached a predetermined temperature for fixing the toner image and the state where the image forming device 100 can quickly form an image on the recording medium when it receives a print signal. Standby state also refers to the state where varnish is supplied to the application roller 201 and the irradiation power of the ultraviolet lamp 203 reaches a predetermined irradiation power and the varnish application device 200 can apply varnish to the recording medium and allow the applied varnish to harden.

[0131] In this exemplary embodiment, a description is given of the case where the user performs print settings via the operation unit 95; however, similar control processing may also be performed when the user performs print settings using an external device 91.

[0132] When setting up printing using the external device 91, the display screen described below is displayed on the display unit arranged on the external device 91.

[0133] When the user operates the operation unit 95, the CPU 81 can execute a print setting mode for performing settings related to image forming processing and other processing. This print setting mode is executed when the user presses a software key such as "Print Settings" displayed on the operation unit 95.

[0134] In step S301, it is determined whether to execute the print setup mode. If the print setup mode is executed by the user (yes in step S301), the process proceeds to step S302. In step S302, the CPU 81 displays on the operation unit 95. Figure 5 The print settings screen.

[0135] If no input operation for print setting mode is received (No in step S301), the CPU 81 waits until an input operation for print setting mode is received, and the image forming system 1000 remains in standby mode.

[0136] In step S303, CPU 81 determines whether the "Apply varnish" software key was pressed on the print settings screen.

[0137] If a "Apply varnish" setting is received (Yes in step S303), the process proceeds to step S304. In step S304, the CPU 81 displays the following on the operation unit 95: Figure 10A The screen showing the varnish thickness setting. Figure 10A An example of a screen showing the varnish thickness setting is provided. Figure 10A As shown, the varnish thickness applied by the varnish application device 200 during the varnish application process can be selected via the varnish thickness setting screen. As described above, in this exemplary embodiment, the varnish thickness to be applied by the varnish application device 200 during the varnish application process can be set to any one of 10 μm, 20 μm, and 30 μm. The user can select the varnish thickness by operating the varnish application device 200. Figure 10A The user can select the desired varnish thickness during the application process using any of the software keys "10μm", "20μm", and "30μm" displayed on the varnish thickness setting screen. Additionally, the user can select... Figure 10A After selecting any of the software keys for the various thicknesses shown, set the varnish thickness by pressing the software key "OK".

[0138] Then, in step S305, CPU 81 determines whether the varnish thickness set in step S304 is 10 μm. If the varnish thickness is set to 10 μm (yes in step S305), the process proceeds to step S306. In step S306, CPU 81 displays on the operation unit 95. Figure 10B The image shows the sheet selection for a varnish thickness of 10 μm. As mentioned above, when selecting 10 μm as the varnish thickness, even when using coated paper as the recording medium, if its basis weight is less than 73.3 g / m²... 2 This will also increase the amount of curling on the recording medium after the varnish is applied.

[0139] Therefore, in this exemplary embodiment, it is necessary to prevent issues with recording media other than coated paper or with a basis weight less than 73.3 g / m³. 2 The coated paper is subjected to a varnish application treatment. Therefore, as... Figure 10B As shown, only those with a basis weight of 73.3 g / m 2 Or a recording medium with a larger coating layer (i.e., coated paper) can be displayed in an optional state. Figure 10B In the recording medium that can be supplied by the image forming apparatus 100, the basis weight is 73.3 g / m³. 2 Alternatively, an option other than a larger coated paper can be used to display a darker color (i.e., gray) than the other options.

[0140] Furthermore, if the varnish thickness set in step S304 is not 10 μm (No in step S305), that is, if 20 μm or 30 μm is selected as the varnish thickness in step S304, the process proceeds to step S307. In step S307, the CPU 81 displays on the operation unit 95. Figure 10C The image shows the sheet selection for varnish thicknesses of 20μm to 30μm. As mentioned above, when the varnish thickness is 20μm or greater, even when using coated paper as the recording medium, when the basis weight of the recording medium is less than 79.1g / m³... 2 At the same time, it will also increase the amount of curling of the recording medium after the varnish is applied.

[0141] Therefore, in this exemplary embodiment, it is necessary to prevent issues with recording media other than coated paper or with a basis weight less than 79.1 g / m³. 2 The coated paper is subjected to a varnish application treatment. Therefore, as... Figure 10C As shown, only those with a basis weight of 79.1 g / m 2 Or a recording medium with a larger coating layer (i.e., coated paper) can be displayed in an optional state. Figure 10C In the recording medium that can be supplied by the image forming apparatus 100, the basis weight is 79.1 g / m³.2 Alternatively, an option other than a larger coated paper can be used to display a darker color (i.e., gray) than the other options.

[0142] As described above, when a varnish application process is performed, the amount of curling of the recording medium increases with the increase of the varnish thickness. Therefore, in Figure 10C The film selection screen shown has fewer available recording media types than in [the previous screen]. Figure 10B The film selection screen displays the number of available recording media types.

[0143] Alternatively, other structures can be used, as long as they can be achieved via... Figure 10B and Figure 10C Any sheet can be selected on the screen to display and a recording medium (i.e., coated paper) with a base weight greater than or equal to a predetermined base weight depending on the varnish thickness. For example, such as Figure 6B As shown, software keys corresponding to recording media other than coated paper and software keys corresponding to coated paper with a basis weight less than a predetermined basis weight depending on the varnish thickness can be hidden. Furthermore, as... Figures 6C to 6E As shown, a software key corresponding to a recording medium other than coated paper and a software key corresponding to coated paper with a basis weight less than a predetermined basis weight depending on the varnish thickness can be displayed in a distinguishable manner, so that the user can understand that the software key cannot receive input operations.

[0144] Furthermore, the software key corresponding to the manual sheet feeding unit (not shown) is displayed in an selectable state because the user can place the coating paper on it. However, if the image forming apparatus 100 does not have a manual sheet feeding unit, the "manual sheet feeding" option does not need to be displayed.

[0145] On the other hand, if no "apply varnish" setting is received (No in step S303), the process proceeds to step S308. In step S308, the CPU 81 displays a sheet selection screen for image forming processing on the operation unit 95. Figure 6A Similar to the sheet selection screen shown, the sheet selection screen for image forming processing according to this exemplary embodiment is displayed in an available state. Figure 10B or Figure 10C All software keys are shown, and there are no restrictions on the type of recording media.

[0146] In step S303, the CPU 81 can determine that no setting for applying varnish has been received, and proceed to step S308 if only the setting for image forming processing has been received.

[0147] Then, in step S309, CPU 81 determines whether the sheet setting on the sheet selection screen displayed in any of steps S306 to S308 has been completed. If the sheet setting is not completed (No in step S309), CPU 81 waits until the sheet setting is completed.

[0148] As described above, according to this exemplary embodiment, when a user via Figure 6A , Figure 10B and Figure 10C When input is performed on any of the display screens shown, the CPU 81 can receive settings for image forming processing or varnish application processing for the recording medium selected by the user.

[0149] If the sheet is set up (Yes in step S309), the process proceeds to step S310. In step S310, the CPU 81 determines whether it has received an instruction to execute the printing process set by the user via the operation unit 95 in steps S301 to S306. If no instruction to execute the printing process is received (No in step S310), the CPU 81 waits until such an instruction is received. Furthermore, the instruction to execute the printing process can be received when the user operates the software key corresponding to the start key displayed on the operation unit 95 or the hardware key corresponding to the start key located on the operation unit 95.

[0150] Upon receiving an instruction to perform printing processing (Yes in step S310), the process proceeds to step S311. In step S311, the CPU 81 controls the drive control unit 96 to perform image forming processing based on the information set in steps S301 to S306. Here, the CPU 81 feeds the recording medium set in any one of steps S306 to S308 from the cartridge 10 or a separately provided device containing the recording medium, and performs image forming processing on the fed recording medium.

[0151] Then, in step S312, based on the processing information set in steps S303 to S305, CPU 81 determines whether to apply varnish to the recording medium on which the image is formed in step S311.

[0152] Then, if a varnish application process is to be performed (as in step S312), the process proceeds to step S313. In step S313, the CPU 81 causes the varnish application device control unit 86 to operate the baffle 206 to transport the recording medium S, for which image forming processing was performed in step S311, to the varnish application path 205. In step S314, the CPU 81 controls the varnish application device control unit 86 to perform a varnish application process on the recording medium S transported to the varnish application path 205 based on the thickness set in step S304.

[0153] Subsequently, in step S315, CPU 81 determines whether all image forming processes and varnish application processes have ended. If not all processes have ended (no in step S315), the process returns to step S311, and CPU 81 performs processing on the next recording medium. As described above, by returning the process to step S311 after performing the varnish application process, CPU 81 can alternately output: the product obtained by performing the varnish application process on the recording medium S and the product obtained without performing the varnish application process.

[0154] On the other hand, if the varnish application process is not performed on the recording medium S for which the image was formed in step S311 (No in step S312), the process proceeds to step S316. In step S316, the CPU 81 causes the varnish application device control unit 86 to operate the baffle 206 to transport the recording medium S for which the image forming process was performed in step S311 to the varnish bypass route 204. Thereafter, in step S315, the CPU 81 determines whether all image forming processes and varnish application processes have ended. If all processes have ended (Yes in step S315), the CPU 81 puts the image forming system 1000 into a standby state, and the process ends. If not all processes have ended (No in step S315), the process returns to step S311, and the CPU 81 performs processing on the next recording medium S.

[0155] As described above, when the user selects "Apply Clear Coating" during input operations related to print settings, the CPU 81 does not accept settings for uncoated paper on the sheet selection screen. Furthermore, the CPU 81 does not accept settings for coated paper where the curl may increase depending on the thickness of the clear coating applied during the clear coating process. In other words, when "Apply Clear Coating" is selected, the CPU 81 does not allow input for uncoated paper or for coated paper with a basis weight less than a predetermined basis weight on the sheet selection screen.

[0156] This design prevents users from mistakenly inputting instructions to apply varnish to uncoated paper. It also prevents users from inputting instructions to apply varnish to recording media in which increased curling is expected when varnish is applied. This design prevents situations where the desired product cannot be obtained due to easy varnish peeling or the inability to achieve the desired three-dimensionality and gloss. It also prevents situations where the desired product cannot be obtained due to curled recording media and prevents transport malfunctions.

[0157] Furthermore, it can prevent a decrease in workability caused by the following situation: after outputting a product obtained by applying varnish to uncoated paper, the user needs to output a product obtained by inputting processing information including new settings of the recording medium S to apply varnish to coated paper again.

[0158] In this exemplary embodiment, the user sets the sheet after setting the varnish application process to set the type of the recording medium S. However, as described in the second exemplary embodiment, the user can set the varnish application process after setting the sheet. In this case, similar to the second exemplary embodiment, when setting the varnish application process, a screen prompting the user to reset the recording medium can be displayed on the operation unit 95.

[0159] Furthermore, in this exemplary embodiment, the varnish application apparatus 200 includes a varnish bypass route 204. However, the varnish application apparatus 200 can have other configurations, as long as it can transport the recording medium without applying varnish. For example, the varnish application apparatus 200 includes a varnish removal unit for removing varnish from the surface of the application roller 201. Then, when uncoated paper is used as the recording medium S, the varnish supply to the application roller 201 is stopped, thereby removing the varnish remaining on the surface of the application roller 201. After removing the varnish remaining on the surface of the application roller 201, the recording medium S is transported through the varnish application route 205 in such a way that the varnish application apparatus 200 can discharge the recording medium S to which varnish application treatment has not been performed without changing the transport path.

[0160] Furthermore, if an inkjet line head is used as the component for applying varnish to the recording medium S, the varnish application device 200 can selectively stop applying varnish by controlling the line head. With this configuration, the varnish application device 200 can also transport the recording medium S via the varnish application route 205 without changing the transport path, thereby discharging the recording medium S to which varnish application treatment has not been performed.

[0161] Furthermore, in the exemplary embodiments described above, the control of the entire image forming system 1000 is performed by the control unit 80 included in the image forming apparatus 100. However, the configuration is not limited to this. For example, the control of the entire image forming system 1000 can be performed by an external device that is independent of the main body of the image forming apparatus 100 and connected to the image forming apparatus 100, allowing data to be input to or output from the image forming apparatus 100. Additionally, the control of the entire image forming system 1000 can be performed by a control unit arranged on the varnish application apparatus 200.

[0162] According to the present invention, the image forming system performs a varnish application process on the recording medium on which the image is formed by the image forming apparatus, as an online process, and can prevent situations where the product desired by the user cannot be obtained.

[0163] One or more embodiments of the present 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 (which may also be more fully referred to as a "non-transient computer-readable storage medium") to perform the functions of one or more embodiments described above and / or includes one or more circuits (e.g., application-specific integrated circuits (ASICs)) for performing the functions of one or more embodiments described above, and by a method performed by a computer of a system or device by, for example, reading and executing computer-executable instructions from a storage medium to perform the functions of one or more embodiments described above and / or controlling one or more circuits to perform the functions of one or more embodiments described above. The computer may include one or more processors (e.g., a central processing unit (CPU), a microprocessor unit (MPU)) and may include a network of individual computers or individual processors to read and execute computer-executable instructions. The computer-executable instructions may be provided to the computer, for example, from a network or a storage medium. The storage medium may include, for example, a hard disk, random access memory (RAM), read-only memory (ROM), a storage device for a distributed computing system, an optical disc (such as a CD, DVD, or Blu-ray disc), or a digital versatile disc (BD). TM One or more of the following: flash memory devices, memory cards, etc.

[0164] Other embodiments

[0165] The embodiments of the present invention can also be implemented by providing software (programs) that perform the functions of the above embodiments to a system or device via a network or various storage media, and the computer or central processing unit (CPU) or microprocessor unit (MPU) of the system or device reads out and executes the program.

[0166] 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: An image forming unit is configured to perform image forming processing for forming an image on a variety of recording media, the variety of recording media including a first type of recording media having a coating layer and a second type of recording media not having a coating layer; A varnish application unit is configured to perform a varnish application process for applying varnish to a recording medium on which an image is formed by the image forming unit; The receiving unit is configured to receive instructions for selecting a recording medium and instructions for applying the varnish. as well as A control unit is configured to control the receiving unit to receive an instruction to apply the varnish to a first type of recording medium, and to control the receiving unit to prevent it from receiving an instruction to apply the varnish to a second type of recording medium. Specifically, upon receiving an instruction to apply the varnish to the first type of recording medium, an image is formed on the coating layer of the first type of recording medium, and a varnish is applied to the coating layer of the first type of recording medium.

2. The image forming system according to claim 1, wherein, If the varnish is instructed to be applied before selecting a recording medium, the control unit performs control to prevent the receiving unit from selecting the second type of recording medium.

3. The image forming system according to claim 2, wherein, The receiving unit includes a display unit configured to display keys for selecting the various types of recording media capable of image forming processing by the image forming unit. In cases where the varnish is instructed to be applied before selecting a recording medium, the control unit performs control to prevent the display unit from displaying the key for selecting the second type of recording medium.

4. The image forming system according to claim 2, wherein, The receiving unit includes a display unit configured to display keys for selecting the various types of recording media capable of image forming processing by the image forming unit, and In the case where the varnish is applied before the recording medium is selected, the control unit controls the display unit such that the key for selecting the second type of recording medium is displayed as unselectable.

5. The image forming system according to claim 1, wherein, When the varnish is instructed to be applied after the second type of recording medium is selected via the receiving unit, the control unit controls the receiving unit to display that the recording medium should be selected again.

6. The image forming system according to claim 1, in, The control unit is configured to receive, via the receiving unit, an input relating to the thickness of the varnish layer applied in the varnish application process, and If the input related to the thickness of the varnish layer received via the receiving unit is less than a predetermined thickness, the control unit performs a first display to display optional recording media on the receiving unit. If the input related to the thickness of the varnish layer received via the receiving unit is greater than or equal to the predetermined thickness, the control unit performs a second display to display fewer optional recording media than those displayed in the first display on the receiving unit.

7. The image forming system according to any one of claims 1-6, wherein, The varnish application unit includes: an application roller for applying varnish to a selected recording medium and a reverse roller disposed opposite to the application roller for cooperating with the application roller to transport the selected recording medium.

8. The image forming system according to any one of claims 1-6, wherein, The varnish application unit includes a linear head for spraying varnish onto the recording medium.

9. The image forming system according to claim 1, further comprising: A first transport path is used to transport a recording medium so that the varnish application unit can perform the varnish application process. as well as A second transport path is used to transport the recording medium, such that the varnish application process is not performed on the recording medium transported via the second transport path. In the case where the image forming unit performs the image forming process without instructing the varnish to be applied through the receiving unit, the control unit transports the recording medium containing the image formed by the image forming unit to the second transport path.

10. The image forming system according to any one of claims 1-6, wherein, The first type of recording medium has a basis weight of 20 g / m³. 2 Up to 40 g / m 2 The recording medium with a coating layer.

11. The image forming system according to any one of claims 1-6, wherein, The first type of recording medium has a basis weight of 12 g / m³. 2 Up to 40 g / m 2 The recording medium with a coating layer.

12. The image forming system according to claim 1, wherein, To prevent a situation where the user cannot obtain the desired product if they receive an instruction to apply varnish to uncoated recording media while performing print settings, the control unit performs control to prevent the application of varnish to uncoated sheets.

Images