Printing system including static eliminator, control method and program thereof

Abstract

To solve the problem in which: in executing printing using a plurality of types of sheets, there has been a demand for means that performs printing while changing the settings of the value of voltage applied in static elimination processing for every sheet to be printed every time the sheet is changed.SOLUTION: A printing system 1000 comprises a printing device 100 executing printing of a print job on a plurality of types of sheets and a static eliminating device 200-3a, and has: specification means S803 that specifies the type of the sheet for every page of the print job; and instruction means S806 that, when the type of the sheet specified by the specification means is different from the type of a sheet of the immediately previous page or the sheet is a top page (S804), sets a parameter corresponding to the type of the sheet of the page to the static eliminating device.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a printing system having a static eliminator, and a control method and program thereof. [Background technology]

[0002] Recording media used in printing (hereafter referred to as "sheets") are transported with static electricity due to residual charge during the electrophotographic process or slight friction with transport rollers and guides that occurs during sheet transport. This static electricity can cause sheets to stick together. It can also cause dust and paper powder to adhere to the finished product, resulting in a decrease in the quality of the finished product. Here, plain paper and the like have a low electrical resistance of the sheet itself, and charges move easily within the paper, so the amount of charge itself is small and dissipates quickly. On the other hand, sheets made of synthetic resin (plastic), such as cardboard, synthetic paper, and coated paper, have a high electrical resistance of the sheet itself, and charge movement is less likely to occur within the paper. As a result, sheets such as synthetic paper and coated paper tend to be more likely to become charged and to retain charge. In addition, it is easily affected by the environment, especially humidity, and it is generally known that the lower the humidity, the less discharged the charge is into the air, making it easier for static electricity to build up. If post-processing is performed while the sheets are stuck together, it will not only affect the sheet alignment process and reduce the quality of the post-processing, but it may also induce jams due to poor paper feeding or transport during post-processing, and may damage the sheets and equipment. Therefore, in order to prevent such a risk from occurring, it is desirable to remove static electricity from the sheet after the printing process before carrying out post-processing.Therefore, a method has been proposed in which a voltage is applied to a pair of transport rollers located downstream in the sheet transport direction to cancel the electric charge on the sheet (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-258881 Summary of the Invention [Problem to be solved by the invention]

[0004] The static elimination method using a configuration in which a voltage is applied to a conveying roller (hereinafter referred to as a "static elimination roller") cancels the static electricity by applying a charge opposite to the charge on the sheet to the sheet via the static elimination roller. Therefore, static elimination control by the static elimination roller (application of a charge opposite to that of the sheet to the static elimination roller) needs to be performed according to the charge amount of the sheet. This is because there is an optimal charge value for static elimination for each printing environment such as humidity and each type of sheet. If static elimination control is performed on a sheet in an inappropriate charge adjustment state, it may cause charging on the contrary, which may lead to further sticking of the sheet. Therefore, for example, when printing while switching between multiple sheet types, it is necessary to perform static elimination control suitable for each sheet type used. An object of the present invention is to provide a mechanism for performing appropriate static elimination control according to the type of sheet in a print job in which a plurality of types of sheets are mixed. [Means for solving the problem]

[0005] The present invention is a printing system comprising a printing device that executes printing of a print job on multiple types of sheets and a static elimination device, characterized in that it comprises an identification means for identifying the sheet type for each page of the print job, and an instruction means for setting parameters corresponding to the sheet type of the page in the static elimination device when the sheet type identified by the identification means is different from the sheet type of the immediately preceding page or when it is the first page. Effect of the Invention

[0006] According to the present invention, it is possible to perform appropriate static elimination control according to the type of sheet in a print job in which a plurality of types of sheets are mixed. [Brief description of the drawings]

[0007] [Figure 1] System configuration diagram of this embodiment [Diagram 2] Hardware block diagram of the printing device [Diagram 3] Cross-sectional view of the printing system [Figure 4] FIG. 1 is a diagram of an operation unit provided in a printing device. [Diagram 5] Hardware block diagram of the static eliminator [Figure 6] Sheet database reference and modification screen via sheet data management means [Figure 7] Schematic diagram of static elimination processing [Figure 8] Flowchart of static elimination control execution according to each page of a sheet DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the following embodiments do not limit the invention as defined by the claims, and not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention. [First embodiment] Overall configuration 1 shows the simplest configuration of this embodiment, which includes a printing system 1000 and a client computer 102 (hereinafter referred to as "PC"), which are connected to each other via a network 101. The PC 102 can transmit PDL (Page Description Language) code data, which is a print job, to the printing system 1000 via the network 101.

[0009] Printing system hardware configuration (System block diagram) Next, the printing system 1000 will be described with reference to the system block diagram of FIG. 2. The printing system 1000 includes a printing device 100, which is enclosed by a dotted line in the figure, and a sheet processing device 200. Any number of sheet processing devices 200 can be connected to the printing device 100. In addition, in this embodiment, the printing device 100 will be described as an example of an MFP (Multi Function Peripheral) having multiple functions such as a copy function and a printer function. However, the printing device 100 may be a single-function printing device having only a copy function or only a printer function. In this embodiment, as an example, the printing system 1000 is assumed to have various components described below.

[0010] The printing system 1000 is configured so that sheet processing for sheets printed by the printing device 100 can be performed by a sheet processing apparatus 200 connected to the printing device 100. However, it is also possible to configure the printing system 1000 using only the printing device 100 without connecting the sheet processing apparatus 200. The sheet processing apparatus 200 is configured so as to be able to communicate with the printing device 100, and can receive instructions from the printing device 100 and perform sheet processing as described below. A scanner unit 201 reads an image on a document, converts it into image data, and transfers it to other units. The external I / F 202 transmits and receives data to and from other devices connected to the network 101 . The printer unit 203 prints an image based on the input image data onto a sheet. 4, the operation unit 204 has a hard key input unit (key input unit) 402 and a touch panel unit 401, and receives instructions from a user via them. The operation unit 204 also displays various information on the touch panel unit 401 that the operation unit 204 has.

[0011] The control unit 205 comprehensively controls the processing and operation of various units included in the printing system 1000. In other words, it also controls the operation of the printing apparatus 100 and the sheet processing apparatus 200 connected to the printing apparatus 100. The ROM 207 stores various computer programs executed by the control unit 205. For example, the ROM 207 stores programs for causing the control unit 205 to execute various processes in flowcharts described below, and display control programs required for displaying various setting screens described below. The ROM 207 also stores programs for the control unit 205 to interpret PDL code data received from the PC 102 and expand it into raster image data. The ROM 207 also stores a boot sequence, font information, and the like. The RAM 208 stores image data and PDL code data sent from the scanner unit 201 and the external I / F 202, various programs loaded from the ROM 207, and setting information. The RAM 208 also stores information related to the sheet processing apparatus 200 (such as information related to the type and function of each sheet processing apparatus 200 connected to the printing apparatus 100). The control unit 205 can use the information related to the sheet processing apparatus 200 stored in the RAM 208 for control.

[0012] The HDD (hard disk drive) 209 is composed of a hard disk and a drive unit that reads and writes data to the hard disk. The HDD 209 is a large-capacity storage device for storing image data input from the scanner unit 201 and compressed by the compression / decompression unit 210. The control unit 205 can print image data stored in the HDD 209 by the printer unit 203 based on an instruction from a user. The HDD 209 is also used as a spooler, and the control unit 205 can manage PDL code data received from the PC 102 as a print job and store it in the HDD 209. The control unit 205 can also manage the print jobs stored in the HDD 209, and can also acquire the number of print jobs stored and setting information made for the print jobs. The compression / decompression unit 210 compresses and decompresses image data stored in the RAM 208 and HDD 209 using various compression methods such as JBIG and JPEG. The sheet data management unit 211 manages sheet parameters (sheet basis weight, surface properties, grain direction) and control parameters used when printing on the sheet (voltage adjustment value during transfer, voltage bias value during static elimination control, etc.) for each type and brand of sheet. Note that although this is shown in the block diagram, the sheet data management unit 211 is in fact a database, and the database itself is stored in the HDD 209. (Sheet database settings / registration screen) The sheet data management unit 211 also has a setting screen for referring to and editing the contents of the database, an example of which is shown in Fig. 6. The printing system 1000 is configured so that the user can call up a setting screen for each sheet via the operation unit 204. When this call is received, the control unit 205 displays a sheet parameter list screen 601 on the touch panel unit 401 of the operation unit 204. The parameter list screen 601 has a field 602 that displays each parameter and its current setting value, and each parameter has a [Change] button that is pressed to change the setting value. For example, when a user presses a [Change] button 603 to change the parameters for adjusting the static elimination bias, the control unit 205 displays an adjustment screen 604 for the static elimination bias on the touch panel unit 401 of the operation unit 204 . The neutralization bias adjustment screen 604 has a field 605 that displays the current setting, and an input button 606 for inputting an increase or decrease in the set value, and allows the user to set the bias voltage of the neutralization process performed by the neutralization device 200-3a described later for the sheet. In this embodiment, the bias voltage of the neutralization process set here is not a direct voltage value [KV], but is configured to set an intensity level having a +- sign in the range of -50 to 50. For the setting here, for example, a voltage of 0.1 [KV] per +1 is applied to the neutralization roller as an actual operation. Note that the units of the set values ​​and the settable ranges shown here are only some examples, and are not limited to these contents. The control unit 205 can access the database via the sheet data management unit 211, and is configured to be able to obtain the characteristics of the sheets used for printing and the corresponding parameters used for print control.

[0013] (Printing device) Next, the configuration of the printing system 1000 will be described with reference to Fig. 3. Fig. 3 is a cross-sectional view of the printing device 100 and the sheet processing device 200 connected to the printing device 100. In Fig. 3, the sheet processing device is configured to include a static eliminator 200-3a and a saddle stitching machine 200-3b. First, the printing device 100 will be described. An automatic document feeder (ADF) 301 separates a stack of documents set on a loading surface of a document tray in order of pages, starting from the first page, and transports them onto a document glass table for document scanning by a scanner 302. The scanner 302 reads the image of the document transported onto the document glass table and converts it into image data by a CCD. A rotating polygon mirror (polygon mirror, etc.) 303 causes a light beam, such as a laser beam, modulated according to the image data to enter the photosensitive drum 304, which is irradiated as reflected scanning light via a reflecting mirror. A latent image formed on the photosensitive drum 304 by the laser beam is developed with toner, and the toner image is transferred to a sheet attached on a transfer drum 305. A full-color image is formed by sequentially executing this series of image formation processes for yellow (Y), magenta (M), cyan (C), and black (K) toners. After four image forming processes, the sheet on the transfer drum 305 on which the full-color image has been formed is separated by a separation claw 306 and conveyed to a fixing device 308 by a pre-fixing conveyor 307. The fixing device 308 is composed of a combination of rollers and belts, and has a heat source such as a halogen heater built in, and melts and fixes the toner on the sheet on which the toner image has been transferred by heat and pressure. The discharge flapper 309 is configured to be swingable around a swing shaft and determines the conveying direction of the sheet. When the discharge flapper 309 is swinging in the clockwise direction in the figure, the sheet is conveyed straight and is discharged outside the machine by a discharge roller 310. The control unit 205 controls the printing device 100 to execute single-sided printing by the above-mentioned series of sequences.

[0014] On the other hand, when images are formed on both sides of the sheet, the discharge flapper 309 swings in the counterclockwise direction in the figure, and the sheet is changed to a downward direction and sent to the double-sided conveying section. The double-sided conveying section includes an inversion flapper 311, an inversion roller 312, an inversion guide 313, and a double-sided tray 314. The inversion flapper 311 swings about a swing axis to determine the conveying direction of the sheet. When processing a double-sided printing job, the control unit 205 controls the inversion flapper 311 to swing in the counterclockwise direction in the figure, and to send the sheet, whose first side has been printed by the printer unit 203, to the inversion guide 313 via the inversion roller 312. Then, the inversion roller 312 is stopped once with the rear end of the sheet being pinched by the inversion roller 312, and the inversion flapper 311 continues to swing in the clockwise direction in the figure. Also, the inversion roller 312 is rotated in the reverse direction. As a result, the sheet is switched back and conveyed, and the sheet is controlled so that the sheet is guided to the double-sided tray 314 with the trailing end and leading end of the sheet switched. The sheet is temporarily stacked in the double-sided tray 314, and then the sheet is sent again to the registration rollers 316 by the re-feed rollers 315. At this time, the sheet is sent with the side opposite to the transfer process of the first side facing the photosensitive drum. Then, the second side image is formed on the second side of the sheet in the same manner as the process described above. Then, the image is formed on both sides of the sheet, and the sheet is discharged from inside the main body of the printer 100 to the outside of the machine through the discharge rollers 310 after the fixing process. The control unit 205 controls the printer 100 to perform double-sided printing through the above-mentioned series of sequences. The printing device 100 also has a paper feed section that stores sheets required for printing processing. The paper feed section includes paper feed cassettes 317 and 318 (each capable of storing, for example, 500 sheets), a paper feed deck 319 (capable of storing, for example, 5,000 sheets), and a manual feed tray 320. The paper feed cassettes 317 and 318 and the paper feed deck 319 can be used to set various sheets of different sizes and materials separately for each paper feed section. Furthermore, the manual feed tray 320 can be used to set various sheets including special sheets such as overhead projector sheets.

[0015] (static eliminator) Next, the static eliminator 200-3a will be described. First, Fig. 5 is a system block diagram of the static eliminator 200-3a. The static eliminator also has a control unit 501 separate from the printer 100, and this control unit 501 is configured to centrally manage the entire static eliminator 200-3a while communicating with the control unit 205 of the printer 100 in Fig. 2 via a bus (not shown). The static elimination processing unit 503 is composed of a static elimination roller 322 and an ionizer 323, which will be described later, and a voltage application controller 321 for each of them, and is responsible for eliminating static electricity from the conveyed sheet. The control unit 502 realizes control of applying voltage to the static elimination roller 322 and the ionizer 323 via the voltage application controller 321. The ROM 504 stores a boot program for the static elimination device 200-3a, a static elimination processing program for the static elimination processing unit 503, and the like. The control unit 501 loads necessary programs from the ROM 504 into the RAM 502 as appropriate and executes them.

[0016] Here, the details of the charge removal process performed by the charge removal unit 503 will be described with reference to FIG. FIG. 7 is a schematic diagram showing how the static elimination device 200-3a performs static elimination processing on a sheet that has been printed by the printing apparatus 100. The same numbers are used for parts common to FIG. 3. First, a sheet 701 is transported to a developing and transferring section consisting of a photosensitive drum 304 and a transfer drum 305 via a transport path 700, and toner is placed on the sheet. The charged toner 702 placed on the sheet is negatively charged, and the sheet is then transported to the static elimination device 200-3a with the print surface 703 side negatively charged after being fixed through a fixing device 308. The static elimination device 200-3a is equipped with a static elimination roller 322 that is positively charged, and applies a positive charge to the negatively charged print surface 703 by contact static elimination with the roller, thereby eliminating the charging state. However, it is assumed that the negative charge that could not be removed by the static elimination processing by the static elimination roller 322, or the positive charge that has been charged inversely, remains on the sheet 705 after the sheet is passed through the static elimination roller. Therefore, the static eliminator 200-3a in this embodiment is further configured to include an ionizer 323 downstream of the static elimination roller 322. The ionizer 323 is a device that applies a voltage to an electrode needle provided in the device itself to generate a corona discharge and uses the ions thus generated to eliminate the charge. In this way, rough static elimination is performed by the static elimination roller 322, and the remaining charge is adjusted by the ionizer, so that the static elimination process is completed and the sheet 707 discharged from the static eliminator 200-3a is in a state where the charge has been eliminated. Returning to the explanation using the cross-sectional view of Fig. 3, the static eliminator 200-3a has a static elimination roller 322 and a pair of rollers, and the sheet transported to the static eliminator 200-3a is transported while being sandwiched between the two rollers, and the above-mentioned static elimination is performed by the static elimination roller 322. Thereafter, the sheet is transported outside the device by the transport roller 324, and the residual charge is eliminated by the ionizer 323.

[0017] (Saddle stitching machine) Next, the saddle stitching machine 200-3b will be described. The sheet processing by the saddle stitching machine 200-3b includes, for example, saddle stitching, punching, cutting, shift discharge, folding, stapling, etc. Here, these jobs are called "saddle stitching jobs". When processing a saddle stitching job, the control unit 205 first conveys the sheets of this job printed by the printing device 100 to the saddle stitching machine 200-3b, and then the control unit 205 causes the saddle stitching machine 200-3b to execute sheet processing of this job. Then, the control unit 205 holds the printed matter of the saddle stitching job that has been subjected to sheet processing by the saddle stitching machine 200-3b in the discharge destination Z of the saddle stitching machine 200-3b. Note that there are multiple discharge destination candidates for the discharge destination Z. This is used when the saddle stitching machine 200-3b can execute multiple types of sheet processing and a discharge destination is divided for each sheet processing. In this embodiment, a detailed description of the conveying procedure of the saddle stitching job is omitted.

[0018] Printing process flow Next, a process for performing printing using a static elimination bias value corresponding to each sheet for a print job in which a plurality of types of sheets to be printed are mixed will be described with reference to the flowchart of FIG. The following processing is realized by the control unit 205 expanding a program stored in the HDD 209 or ROM 207 onto the RAM 208 and executing it. First, in step S801 , the control unit 205 of the printing apparatus 100 receives a print job via the network 101 and the external I / F 202 . Next, in step S802, the control unit 205 interprets the settings of the print job received in step S801, and ascertains the designated contents, such as the number of copies to be printed, the paper discharge destination, and post-processing. Next, in step S803, the control unit 205 reads one page of PDL data from the spooler, expands it, and specifies the type of sheet to be used for printing the page. In S804, the control unit 205 determines whether the page currently being processed is the first page, or whether the type of sheet confirmed in S803 has changed from the page previously processed. If it is not the first page, and the type of the identified sheet has not changed from the page previously processed (NO in S804), the control unit 205 advances the process to S808. On the other hand, if it is the first page in S804, or the type of the identified sheet has changed from the page previously processed (YES in S804), the control unit 205 advances the process to S805. In S805, the control unit 205 acquires, via the sheet data management unit 211, the static elimination bias value corresponding to the sheet from the database. In the next step S806, the control unit 205 notifies the control unit 502 of the static elimination device 200-3a of the adjustment value of the static elimination bias acquired in step S805, and issues an instruction to set the static elimination bias value for the static elimination roller 322. In S807, the control unit 502 of the static elimination device 200-3a actually applies a static elimination bias voltage to the static elimination roller 322 via the voltage application controller 321, using the static elimination bias value notified by the setting instruction of the control unit 205 in S806. Then, it notifies the control device 205 of the printing device 100 that the voltage application has been performed using the static elimination bias value that has been instructed to be set (Ack). By adding the determination control of S804 in this way, it is possible to control so that the process of acquiring the printing parameters of the target sheet and the adjustment of the static elimination bias are performed only when the first page or the sheet is changed during printing. Then, in S808, when the control unit 205 of the printing apparatus 100 receives a notification of execution of voltage application of the static elimination bias from the control unit 502 of the static elimination apparatus 200-3a in S807, the control unit 205 controls the printer unit 203 to execute printing of the page. Thereafter, in S809, the control unit 205 determines whether the printed page is the final page of the print job. If it is determined in S809 that it is the final page (YES in S809), the process ends, and if it is determined that it is not the final page (NO in S809), the process returns to S803 and continues with the next page and onward. By executing such control for each page included in the print job, it is possible to realize static elimination control according to the sheet type of each page, even in a print job that includes multiple sheet types. In the above embodiment, if it is determined that the type of sheet has changed from the previous sheet (S804), setting of the static electricity removal bias value is instructed in S806. However, even if the type of sheet has changed, if the static electricity removal bias value acquired in S805 is the same as the static electricity removal bias value of the previous sheet, the process may proceed to S808 without instructing the setting, and printing may be performed. In addition, in S805, the anti-static bias value corresponding to the sheet is obtained from a database via the sheet data management unit 211, but this database does not have to be in the HDD 209 and may be stored in a device such as a server on a network.

[0019] Finally, a method for performing printing using a plurality of types of sheets under optimal static elimination settings in a printing system that performs the above-mentioned processing will be described. (Adjustment of static elimination bias) To realize this use case, before actual printing, it is necessary to set and register in advance the optimum adjustment value of the static elimination bias for the sheet to be used via the sheet data management unit 211. Therefore, a method for adjusting the voltage bias value during static elimination control corresponding to each sheet in the database of the sheet data management unit 211 will be described. In this embodiment, the adjustment is performed manually by the user, and the adjustment method is provided in the form of a manual for using the device. First, the user performs printing using the sheet to be adjusted. Then, as described above, printing is performed after performing static elimination processing based on the static elimination bias value corresponding to the target sheet in the database at this time. In addition, in the default state where the setting has never been operated, the setting value is set to 0 (no static elimination control), and when printing is performed in this state, static elimination control is not applied. In this embodiment, since the MFP is taken as an example of a printing device of the printing system, printing may be performed by a copy job using the equipped scanner. Next, the user uses a device such as a surface potential meter or an electrostatic potential meter to measure the charge amount of the output print sheet and check the charge amount of the printout. By using these devices to measure, the user can know the specific value of the charge amount in units such as voltage V (volts). Then, based on the measurement result, the user sets the adjustment value of the charge removal bias in the sheet parameters of the target sheet via the charge removal bias adjustment screen 604 described above. Here, as a guide for setting the adjustment value, the manual will also describe a combination of the voltage value [V] of the measured charge amount and the adjustment value that serves as a guide for removing the charge, and will serve as a guide for the setting work. Then, after setting the sheet parameters of the target sheet, the user again prints using the target sheet and measures the charge amount in the same manner as described above. In this way, by repeating the measurement and fine adjustment of the parameter value until the measured charge amount of the sheet becomes a sufficiently small value, a charge removal bias value suitable for the target sheet can be set and registered for that sheet. Then, by performing this process for all the sheets to be used and then performing actual printing, it becomes possible to perform printing using multiple types of sheets under the optimal charge removal bias value setting.

[0020] (Other Examples) In the above embodiment, the control unit 205 determines whether the currently processed page is the first page or not, or whether the type of the sheet specified in S803 has changed from the page processed immediately before. If the page is the first page or the type of the sheet specified in S804 has changed from the page processed immediately before (YES in S804), the control unit 205 advances the process to S805. In this case, the control unit 205 acquires the static elimination bias value corresponding to the sheet from the database via the sheet data management unit 211 in S805. In the following S806, the control unit 205 notifies the control unit 502 of the static elimination device 200-3a of the adjustment value of the static elimination bias acquired in S805, and instructs the static elimination roller 322 to set the static elimination bias value. However, the present invention is not limited to this. For example, the control unit 205 may access a database via the sheet data management unit 211 without making a judgment such as S804, and issue an instruction to set the discharge bias value set in the sheet information of the sheet on which the page is to be printed, for each page. The present invention can also be realized by a process in which a program for implementing one or more of the functions of the above-described embodiments is supplied to a system or device via a network or a storage medium, and one or more processors in a computer of the system or device read and execute the program. The present invention can also be realized by a circuit (e.g., ASIC) that implements one or more of the functions. The disclosure of this embodiment includes the following configuration, method, and program. (Configuration 1) A printing system including a printing device that executes printing of a print job on a plurality of types of sheets and a static elimination device, A sheet type specifying unit for specifying a sheet type for each page of the print job; an instruction unit for setting a parameter corresponding to the sheet type of the page in the static elimination device when the sheet type specified by the specification unit is different from the sheet type of the immediately preceding page or when the sheet type is the first page; A printing system comprising: (Configuration 2) The parameter corresponding to the type of sheet is a charge removal bias value, and the printer further includes an acquisition means for acquiring the parameter from a database. 2. The printing system according to configuration 1. (Configuration 3) The printing apparatus further includes a control unit that controls the printing to be performed when the printing apparatus receives a notification from the static eliminator that the parameters have been set and voltage application has been performed. 3. The printing system according to configuration 1 or 2. (Configuration 4) A printing system including a printing device that executes printing of a print job on a plurality of types of sheets and a static elimination device, A sheet type specifying unit for specifying a sheet type for each page of the print job; an instruction unit for setting, in a static eliminator, parameters set for each type of sheet identified by the identification unit; A printing system comprising: (Configuration 5) The printing system according to configuration 4, wherein the parameter is a charge removal bias value. (Method 1) A control method for a printing system including a printing device that executes printing of a print job on a plurality of types of sheets and a static elimination device, comprising: a step of identifying a sheet type for each page of the print job; an instruction step of instructing a static elimination device to set parameters corresponding to the sheet type of the page when the sheet type specified by the specification step is different from the sheet type of the immediately preceding page or when the sheet type is the first page; 13. A method for controlling a printing system comprising: (Method 2) The control method for a printing system according to Method 1, wherein the parameter corresponding to the type of sheet is a charge removal bias value, and further comprising an acquisition step of acquiring the parameter from a database. (Method 3) The control method for a printing system described in Method 1 or 2, further comprising a control step of controlling to execute printing when a notification is received from the static elimination device that the parameters have been set and voltage application has been executed. (Configuration 9) A program for causing a computer to execute the printing system control method according to the first method. [Explanation of symbols]

[0021] 100 Printing device 205 Control Unit 200 Sheet processing device 322 Antistatic roller 323 Ionizer

Claims

1. Printing means for performing a printing process on a sheet used in a print job, A static elimination means for performing static elimination on a sheet printed by the aforementioned printing means, A printing system equipped with an operating unit, A display means for displaying the type of first sheet and the first static elimination setting value corresponding to the type of first sheet on the operation unit, A second static elimination setting value, which is different from the first static elimination setting value, and a receiving means that receives the second static elimination setting value corresponding to the type of the first sheet at the operation unit, A storage means for storing the second static discharge setting value received by the reception means, After being stored in the storage means, the receiving means receives the print job, An execution means that performs control on the sheet printed by the printing means to perform static discharge processing on the sheet printed by the printing means, based on the second static discharge setting value stored by the storage means, A printing system characterized by having the following features.

2. The printing system according to Claim 1, characterized in that the control to perform static elimination on the sheet based on the second static elimination setting value is to control the static elimination device so that the setting value of the static elimination device is set to the second static elimination setting value.

3. The printing system according to claim 2, characterized in that the control to perform static elimination on the sheet based on the second static elimination setting value includes controlling the static elimination device to set the setting value of the static elimination device to the second static elimination setting value for the first sheet in the print job, or for a sheet whose type has been changed from the previous sheet.

4. The printing system according to claim 3, characterized in that the control to perform static elimination on the sheet based on the second static elimination setting value is to control the static elimination device so as not to perform the process of setting the static elimination device setting value on the sheet which is the first sheet in the print job and whose type has not been changed from the previous sheet.

5. A second receiving means that receives a third static elimination setting value corresponding to the type of the first sheet via the operating unit, The system further includes a second storage means for storing the third static elimination setting value corresponding to the first type of sheet, The printing system according to claim 1, characterized in that the third static elimination setting value is different from both the first static elimination setting value and the second static elimination setting value.

6. The printing system according to claim 1, characterized in that the operation unit accepts the second static elimination setting value corresponding to the first sheet type, which means the operation unit accepts the selection of the first sheet type and, after accepting the selection of the first sheet type, accepts the selection of the second static elimination setting value.

7. The printing system according to claim 1, characterized in that the first static elimination setting value and the second static elimination setting value are each static elimination bias values.

8. A printing step that performs a printing process on a sheet used in a print job, A static discharge step is performed to discharge the sheet printed in the printing step, A display step in which the type of first sheet and the first static elimination setting value corresponding to the type of first sheet are displayed on the operating unit, The second static elimination setting value is different from the first static elimination setting value, and the operation unit receives the second static elimination setting value corresponding to the first sheet type in a receiving step, A storage step for storing the second static elimination setting value received in the reception step, After being stored in the storage step, a receiving step is performed to receive the print job, An execution step which controls the static discharge process performed by the static discharge step based on the second static discharge setting value stored in the storage step, A method for controlling a printing system, characterized by having the following features.

9. A program for causing a computer to execute the control method for the printing system described in claim 8.

10. A second display means for displaying a second sheet type and a third static elimination setting value corresponding to the second sheet type, A second receiving means that receives a fourth static elimination setting value, which is different from the third static elimination setting value, and which corresponds to the second type of sheet, at the operation unit, The fourth static elimination setting value received by the second receiving means is further stored in the storage means. The printing system according to claim 1, further comprising: an execution means that executes control to perform static discharge processing on a sheet printed by the printing means based on the fourth static discharge setting value stored by the storage means.

11. The printing system according to claim 1, characterized in that storing the second static elimination setting value corresponding to the first sheet type in the storage means deletes the first static elimination setting value corresponding to the first sheet type from the storage means.

Images