JP2012118222A - Image forming device, image leakage prevention method and image leakage prevention control program - Google Patents

Abstract

Information leakage at power-off is prevented and image data confidentiality is ensured.
An image forming unit and a process controller including a photoreceptor belt and an intermediate transfer belt for forming an image on a sheet, and a photoreceptor cleaning unit and an intermediate for cleaning an image formed on the photoreceptor belt and the intermediate transfer belt. Image formation comprising: a transfer belt cleaning unit; a memory for storing image data and job files in a predetermined storage area; and a deletion unit for deleting image data and job files stored in the storage area from the storage area In the apparatus, when the power is cut off (step S1), the image data and the job file are deleted from the storage area by the deleting unit (step S2a), and the images formed on the photosensitive belt and the intermediate transfer belt are cleaned by both cleaning units. (Steps S2b, S2c .
[Selection] Figure 3

Description

  The present invention relates to an image forming apparatus, an image leakage prevention method, and an image leakage prevention control program, and more particularly, to an electrophotographic image forming apparatus considering prevention of confidential leakage, an image leakage prevention method, and an image leakage prevention in the image forming apparatus. It relates to the control program.

  As a technique for ensuring confidentiality by deleting image data and job files from a storage area (such as a hard disk) when the power of the image processing apparatus is turned off during image output processing, for example, Patent Document 1 Alternatively, it is already known as disclosed in 2. Among them, in Patent Document 1 (Japanese Patent Laid-Open No. 2006-139382), in order to be able to maintain the confidentiality of print data even in a situation where the power is cut off, the job information is stored in the image processing apparatus. Storage means for storing, holding means for holding erasure information indicating whether or not the job information is to be erased from the storage means, and control means for executing image processing based on the job information And an erasing unit for erasing job information stored in the storage unit according to the erasing information under a predetermined condition.

  Patent Document 2 (Japanese Patent Application Laid-Open No. 2006-174238) describes a storage unit that stores the job information in order to improve the security of the image data in the image data storage unit while shortening the processing time. Under predetermined conditions, holding means for holding erasure information indicating whether or not it is necessary to erase job information from the storage means, control means for executing image processing based on the job information, Erasing means for erasing the job information stored in the storage means according to the erasing information, temporarily storing the acquired image data in the image data storing means, and converting the image data into a data format suitable for recording output The image forming unit records and outputs an image on a sheet based on the recording format image data, and then erases the image data in the image data storage unit. In the image forming apparatus, the acquired image data is stored in the data storage unit for each of yellow, magenta, cyan, and black plates, and the image data of each color plate is converted into the recording format image data to obtain the image. A data confidential process is performed in which the forming unit records and outputs on a sheet of paper, and erases at least one of the color image data of the color storage unit of the data storage unit that has completed the record output. Disclosed inventions are disclosed.

  However, in the inventions described in Patent Documents 1 and 2, when the power is turned off, the job being processed forms an electrostatic image or a toner image on the photosensitive drum, and if a toner image is formed on the transfer belt, it is stored in the storage area. Even if only the stored image data and job file are deleted, the image remains on the photosensitive drum or the transfer belt, and there is a possibility that information leakage may occur. Therefore, the problem to be solved by the present invention is to prevent the occurrence of information leakage when the power is shut off and to ensure the confidentiality of the image data.

  In order to solve the above problems, the first means includes an image forming means including an image carrier for forming an image on a recording medium, a cleaning means for cleaning an image formed on the image carrier, and a predetermined unit. An image forming apparatus comprising: storage means for storing image data and job files in the storage area; and deletion means for deleting image data and job files stored in the predetermined storage area of the storage means from the storage area The image data and the job file are deleted from the storage area by the deleting unit when the power is shut off, and the image formed on the image carrier is cleaned by the cleaning unit.

  The second means is characterized in that in the first means, priority processing selection means for selecting in advance whether priority is given to the security ensuring process or priority is given to shortening the power-off time.

  The third means is characterized in that in the first means, at the time of power-off, a user who is performing the power-off operation includes a security ensuring process execution selecting means for selecting whether to execute the security ensuring process. .

  According to a fourth means, in the first means, a confidentiality level setting means for setting a plurality of confidentiality levels in the print job, and whether the security ensuring process is performed in correspondence with the set confidentiality level when the power is turned off. And a process execution setting means for setting whether or not.

  The fifth means includes a cleaning selection means for selecting whether or not to clean the image formed on the image carrier by the cleaning means when the power is shut off in any one of the first to fourth means. It is characterized by having.

  A sixth means is characterized in that, in the fifth means, the selecting means selects the cleaning of the image carrier by the cleaning means only when the image carrier has an image.

  A seventh means is characterized in that, in the fifth means, the image carrier is a photosensitive member or a transfer medium onto which an image on the photosensitive member is transferred.

  The eighth means includes an image forming means including an image carrier for forming an image on a recording medium, a cleaning means for cleaning the image formed on the image carrier, and image data and a predetermined storage area. An image leakage prevention method in an image forming apparatus comprising: storage means for storing a job file; and deletion means for deleting image data and job files stored in a predetermined storage area of the storage means from the storage area. A step of deleting image data and a job file stored in the predetermined storage area by the deletion unit, and a step of cleaning an image formed on the image carrier by the cleaning unit when the power is shut off, It is characterized by including.

    A ninth means is an image leakage prevention control program for preventing a computer from leaking an image when the power of the image forming apparatus is turned off. When the power is turned off, the ninth means stores the image in a predetermined storage area of the storage means. And a procedure for deleting the image data and the job file, and a procedure for cleaning the image formed on the image carrier before the power is turned off.

  In the embodiments described later, the recording medium is on paper, the image carrier is on the photosensitive belt 217 and the intermediate transfer belt 218, the image forming means is on the image forming unit 6 and the process controller 7, and the cleaning means is on the photosensitive member cleaning. In the unit 209 and the intermediate transfer belt cleaning unit 201, the storage means is in a memory (not shown), the storage area is in reference numeral 8, the deletion means is in a determination controller 9 and a memory controller (not shown), the image forming apparatus is in reference numeral 100, and priority processing is performed. The selection means (example 1), the security ensuring process execution selection means (example 2) and the process execution setting means (example 3) are in step S3, the cleaning selection means is in step S4, the photoconductor is on the photoconductor belt 217, and the transfer medium. Corresponds to the intermediate transfer belt 218, respectively, and is deleted by the deleting means and cleaned by the cleaning means. Ring main control unit executes (not shown) based on the determination of the determination control unit 9.

  According to the present invention, it is possible to prevent the occurrence of information leakage at the time of power-off and ensure the confidentiality of image data.

1 is a diagram schematically showing an overall configuration of an image forming apparatus according to an embodiment of the present invention. FIG. 3 is a block diagram illustrating a control configuration of the image forming apparatus according to the embodiment of the present invention. It is a flowchart which shows the control procedure of the basic control for ensuring confidentiality at the time of power-off. FIG. 4 is a flowchart illustrating an example in which it is determined whether or not a confidentiality ensuring process is executed in advance when processing is performed as in FIG. 3. FIG. 5 is a diagram illustrating a display example of a message and a selection screen displayed on the display panel in the determination process of step S3 of FIG. 4. 10 is a flowchart illustrating a processing procedure when a power-off process is performed by determining whether or not to perform cleaning of the photosensitive belt and cleaning of the intermediate transfer belt. 10 is a flowchart illustrating a processing procedure when it is determined whether there is an image on the photosensitive belt or the intermediate transfer belt, and cleaning of the photosensitive belt and the intermediate transfer belt is performed based on the result.

  According to the present invention, during image data output processing, when the image forming apparatus is turned off, highly confidential image data recorded in the storage area is deleted, and the photosensitive drum and transfer belt are cleaned, and the photosensitive drum and transfer image are transferred. The image (electrostatic image, toner image “transfer belt only”) is not left on the belt. Thereby, leakage of highly confidential image data with high confidentiality can be prevented.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram schematically showing an overall configuration of an image forming apparatus according to an embodiment of the present invention. The image forming apparatus according to the present embodiment basically includes an image forming unit 100, an image reading unit 101, an image writing unit 102, and a paper feeding unit 103.

  In the image forming unit 100, a photosensitive belt 217 is disposed in the center, and a charging unit 211, a writing unit 214, a developing unit 216, an intermediate transfer belt 206, and a photosensitive member cleaning unit 209 are arranged along the outer periphery of the photosensitive belt 217. Are arranged in this order along the rotation direction of the endless photosensitive belt 217. The photosensitive belt 217 is in contact with the endless intermediate transfer belt 206 at a portion where primary transfer is performed, and a primary transfer unit 220 is provided in a portion where the photosensitive belt 217 contacts the back side of the intermediate transfer belt 206. Between the primary transfer portion where the photoreceptor belt 217 and the intermediate transfer belt 206 are in contact with the charging unit 211, the photoreceptor cleaning unit 209 and the photoreceptor waste toner bottle 210 are disposed from the upstream side in the rotation direction of the photoreceptor belt 216. A writing unit for laser light emitted from the writing unit 214 is set between the charging unit 211 and the developing unit 216. The developing unit 216 is provided independently for each of four colors Y (yellow), M (magenta), C (cyan), and K (black), and includes a toner cartridge 215 for each color.

  A primary transfer unit 220 and an intermediate transfer waste toner bottle 208 are arranged inside the intermediate transfer belt 206, and the secondary transfer unit is in contact with the intermediate transfer belt 206 across the paper feed conveyance path 230 on the outer periphery. 207 is provided, and the intermediate transfer belt cleaning unit 201 is disposed between the intermediate transfer belt 206 and the primary transfer portion on the downstream side in the rotation direction.

  The image reading unit 101 includes a scanner unit 203 that performs so-called optical reading. The image reading unit 101 is installed on the upper surface of the image forming unit 100, reads an original image placed on the contact glass 203 a with a scanner, converts it into digital data, and converts the image into digital data. The image is sent to the image processing unit 2 of the forming unit 100 (see FIG. 2).

  The image writing unit 102 writes laser light emitted from four light sources provided for each color onto the photosensitive belt 217 using a polygon mirror and an imaging optical system. Instead of such a polygon scanning system, writing can be performed on a line by a laser diode array.

  The sheet feeding unit 103 includes first and second sheet feeding trays 212 and 213, sheet feeding units 212 a and 213 a, and a vertical conveyance path 221, and a fixing unit 205 is disposed downstream of the secondary transfer unit in the vertical conveyance path 221. Is disposed, and a paper discharge unit 204 is provided downstream of the fixing unit 205. A discharge tray 219 is provided downstream of the discharge roller at the last stage of the discharge unit 204.

  In this embodiment, a tandem-type indirect transfer type color image forming apparatus (color copying machine) using the photosensitive belt 217 and the intermediate transfer belt 218 is illustrated, but the photosensitive drum is used as the image carrier. However, it may be a transfer drum, and if it can form a monochrome image, only a photosensitive belt or a photosensitive drum may be used. Therefore, the type of the image forming apparatus is not limited. The present invention can be applied to any system that transfers an image formed on a carrier to another medium.

  In the image forming apparatus generally configured as shown in FIG. 1, when an instruction to start copying is given by an operation unit (not shown), the scanner unit 203 reads a document. The read image data is written on the photosensitive belt 217 by the writing unit 214 in order for each color. The photoreceptor bell 217 is uniformly charged in advance by the charging unit 211. The laser light emitted from the LD unit in the writing unit 214 irradiates the photosensitive belt 217, whereby an electrostatic latent image for each color is formed on the photosensitive belt 217. The electrostatic latent image formed on the photosensitive belt 217 is developed by the developing unit 216 corresponding to the color, and a toner image is formed on the photosensitive belt 217.

  The toner image formed on the photoreceptor belt 217 is transferred onto the intermediate transfer belt 218 of the intermediate transfer belt unit 206, and the toner image transferred to the intermediate transfer belt 218 is further transferred to the first paper feed tray 212 or the second paper feed. The image is transferred onto a sheet fed from the tray 213 using the secondary transfer unit 207. The toner image transferred onto the paper is thermally fixed by the fixing unit 205 and fixed on the paper. Then, the sheet on which the toner image is thermally fixed by the fixing unit 205 is discharged onto the discharge tray 219 by the discharge unit 204, and a copy image can be obtained on the sheet.

  The toner remaining without being transferred to the photosensitive belt 217 and the intermediate transfer belt 218 is cleaned by the photosensitive member cleaning unit 209 or the intermediate transfer belt cleaning unit 201, and is respectively transferred to the photosensitive member waste toner bottle 210 and the intermediate transfer waste toner bottle 208. Accumulated as waste toner. In the fixing unit 205, a small amount of silicon oil is applied by the fixing unit application unit 202 in order to improve the separation of the paper after fixing.

  FIG. 2 is a block diagram showing a control configuration of the image forming apparatus according to the present embodiment. The control configuration of the image forming apparatus 100 includes an image processing unit 2, an operation board 3, a power shut-off receiving unit 4, a writing interface 5, an image forming unit 6, a process controller 7, a storage area 8, a judgment control unit 9, and a recording medium tray 10. The image processing unit 2, the power shut-off receiving unit 4, and the storage unit 12 are connected to the LAN 15. Further, an image processing unit 2, a writing interface 5, an image forming unit 6, a process controller 7, a storage area 8, a determination control unit 9, and a recording medium tray 10 are connected to the serial bus 14.

  Further, the image processing unit 2 and the writing interface 5, the writing interface 5 and the image forming unit 6, the power cutoff acceptance unit 4 and the judgment control unit 9, the power cutoff acceptance unit 4 and the operation board 3 are connected so as to be able to communicate with each other. The operation board 3 is communicably connected to the storage unit 12, and the image processing unit 2 receives the image data read by the image reading unit 101. The image processing unit 2 processes the image information, Based on the processed image data, a visible image is formed on the paper by the image forming unit 6.

  The LAN 15 is connected to the personal computer 1, receives instruction information and image data from the personal computer 1, transmits it to the image forming apparatus 100 side, and the control information of the image forming apparatus 100 is notified to the personal computer 1 side via the LAN 15. The

  Specifically, when a document is read by the image reading unit 101, image data of the read image is transferred to the image processing unit 2. In the case of printing, the image data desired to be output from the personal computer 1 is transferred to the image processing unit 2 via the LAN 15. The image data transferred to the image processing unit 2 is subjected to various processing such as compression, gradation processing, and image quality improvement by the image processing unit 2. The processed image data is stored in the storage area 8 of the memory and is also transferred to the writing interface 5. The writing interface 5 performs laser control on the processed data (signal) by pulse width and power modulation. Thereafter, the image data is sent to the image forming unit 6, and the image forming unit 6 forms a reproduced image on a sheet (recording medium).

  The process controller 7 controls the flow of image data. In other words, the process from the transmission of image data to the image forming apparatus 100 to the completion of the print job is managed. As a result, the formation of a latent image on the photosensitive belt 217 of the image forming unit 6 is started, and the timing until the toner image visualized by toner development is transferred to the intermediate transfer belt and the image formation on the intermediate transfer belt are started. The timing from the end to the end of the transfer is known.

  The power cutoff request is made from the operation board 3 or the personal computer 1 and received by the power cutoff acceptance unit 4. When the power cutoff acceptance unit 4 accepts the power cutoff, it notifies the judgment control unit 9. The judgment control unit 9 performs processing (including logic judgment) when the power is turned off. The determination control unit 9 performs an image data confidentiality ensuring process, and when the process is completed, a response to that effect is returned to the power shutoff accepting unit 4, and then the power shutoff process is performed. Inputs (setting values, etc.) from the operation board 3 or the personal computer 1 are stored in the storage unit 2.

  In addition, since it is not the object of this invention about a power-supply-cutoff process, description here is abbreviate | omitted.

3, 4, 6, and 7 are flowcharts showing a processing procedure of processing performed by the determination control unit. In each flowchart, the same processing is denoted by the same reference numeral, and redundant description is omitted as appropriate. To do.
FIG. 3 is a flowchart showing a control procedure of basic control for ensuring confidentiality when the power is shut off. In the figure, when a power shutdown occurs and a power shutdown request is received from the power shutdown acceptance unit 4 (step S1), the storage area 8 of the memory storing the image data is cleared (step S2a), and the photosensitive belt 217 is removed. Cleaning is performed (step S2b), and at the same time, the intermediate transfer belt 218 is cleaned (step S2c). Next, the control unit (main CPU (not shown)) that performs the power shutdown process is notified that the power shutdown process can be executed (step S8). When this notification is received, the power shutdown process of the image forming apparatus 100 is started. The memory storage area 8 is cleared by a memory controller (not shown) based on the determination by the determination control unit 9. Therefore, the determination control unit 9 and the memory controller correspond to the deleting means.

  In this flowchart, as shown in FIG. 1, since the multi-color image is formed using the photosensitive belt 217 and the intermediate transfer belt 218, the steps on the photosensitive belt 217 and the intermediate transfer belt 218 are performed in steps S2b and S2c. However, when other types of intermediate image forming media such as a photosensitive drum are used, it goes without saying that all of these media are cleaned. In the flowchart, the transfer belt refers to the intermediate transfer belt 218 in the present embodiment.

  As described above, when the image data and the job file in the storage area 8 are deleted in the steps S2a, S2b, and S2c and the photosensitive belt 217 and the intermediate transfer belt 218 are cleaned, the power cut-off process is performed. Data leakage can be prevented.

  FIG. 4 is a flowchart showing an example in which it is determined whether or not the confidentiality ensuring process is executed in advance when processing is performed as shown in FIG. In this processing procedure, when a power-off request is received from the power-off accepting unit 4 (step S1), it is checked whether or not each confidential process is executed (step S3). Is stored (step S2a), the photosensitive belt 217 is cleaned (step S2b), and the intermediate transfer belt 218 is simultaneously cleaned (step S2c). Next, the control unit (main CPU (not shown)) that performs the power shutdown process is notified that the power shutdown process can be executed (step S8). When this notification is received, the power shutdown process of the image forming apparatus 100 is started.

  On the other hand, if it is not necessary to execute the security ensuring process in step S3, the security ensuring process in steps S2a, S2b, and S2c is skipped to notify that the power can be shut off (step S8), and the power shutoff process is started.

  In this way, if the security process is determined in advance, if the security process is not required, it will be processed avoiding unnecessary processing when the power is shut down. Can be shortened.

There are various modes for determining whether or not the security ensuring process is performed in step S3. As a simple example, the following may be mentioned.
Example 1) User sets in advance. The user uses the operation board 3 shown in FIG. 2 or the personal computer 1 to set whether to execute the security process. The set value is stored in the storage unit 12 of FIG. The storage unit 12 has a default value, and when the user sets whether or not the security process is performed, the setting value overwrites the default value. The determination control unit 9 determines whether to execute the security ensuring process with the set value in the storage unit 12.

Example 2) When the power is shut off, a message for selecting whether or not to perform confidentiality processing is displayed on the display panel of the operation board 3 or the display of the personal computer 1 to request the user's selection (input), and the judgment is made by the user's selection. To do.

  FIG. 5 is a display example of a message displayed on the display panel and a selection screen. In this example, a message “Do you want to execute the security process” 3a is displayed, and an “execution” selection button 3b and an “unnecessary” selection button 3c are displayed below it, and the user selects one of the selection buttons 3b. , 3c is pressed to select whether or not to perform the security process, and the determination in step S3 is made based on this selection.

Example 3) A confidentiality level (public disclosure level, external confidential level, internal confidential level, etc.) is set for a print job. When the power is turned off, if the job being processed is above a certain level, the security process is performed. The user determines the level at which the security ensuring process is to be performed (threshold level setting). The threshold level is set by the method shown in Example 1 or by the method of selecting by the selection button as in Example 2.

  FIG. 6 is a flowchart showing a processing procedure in the case where the power-off process is performed by determining whether or not the cleaning of the photosensitive belt and the cleaning of the intermediate transfer belt is performed.

  That is, if the image data in the recording area 8 is deleted when the power is cut off, an image may be left on the photosensitive drum or the transfer belt, and the image in the storage area 8 is cut off in order to cut off the power quickly. When it is sufficient to delete only the data, it is not necessary to clean the photosensitive belt 217 and the intermediate transfer belt 218. Therefore, in such a case, in order to prevent unnecessary processing from being performed when the power is turned off, the photosensitive belt 217 is executed in parallel with the storage area clear processing (step S2a) when the security ensuring processing is executed in step S3. Whether or not the intermediate transfer belt 218 is to be cleaned is determined (step S4). If it is determined that the intermediate transfer belt 218 is not to be cleaned, the process skips to step S8 to notify that the power can be shut off and determines that the cleaning is to be performed. In this case, after the cleaning of the photosensitive belt 217 and the cleaning of the intermediate transfer belt 218 are executed (steps S2b and 2c), a notification that the power can be shut off is sent (step S8). Whether or not cleaning is to be performed is determined by a method such as that shown in Example 1 or Example 2, for example. In addition, although not specifically described here, the determination can be performed by various methods.

  Since each other process is the same as that of the flowchart shown in FIG. 4, description is abbreviate | omitted.

  As described above, in the processing procedure shown in FIG. 6, it is necessary to check whether or not belt cleaning is performed, and if it is not necessary to clean the photosensitive belt (drum) 217 and the transfer belt 218, it is necessary to ensure the confidentiality. If there is no power, the power supply is shut off quickly, and if the photoreceptor belt cleaning and the transfer belt cleaning are not required, unnecessary processing such as cleaning unnecessary for the user is not performed. Load supply can be reduced.

  FIG. 7 is a flowchart showing a processing procedure when it is determined whether there is an image on the photosensitive belt or the intermediate transfer belt, and cleaning of the photosensitive belt and the intermediate transfer belt is performed based on the result.

  When the power is turned off, there is no job being processed, or there is no electrostatic image or toner image on the photosensitive belt (drum) 217 even if there is a job being processed, or there is no toner image on the intermediate transfer belt 218. In this case, it is not necessary to perform a cleaning process on these belts 217 and 218.

  Therefore, in the processing procedure shown in the flowchart of FIG. 7, a step (step S 6) for determining whether or not there is an image on the photosensitive belt 217, and a step after the step S 4 in the flowchart of FIG. A step (step S5) for determining whether or not there is an image is provided, and whether to perform belt cleaning is determined according to the determination result. That is, when cleaning is performed in step S4, it is determined whether or not there is a toner image on the intermediate transfer belt 218 (step S5), and belt cleaning of the intermediate transfer belt 218 is performed only when there is a toner image (step S5). S2c).

  In parallel with this, it is determined whether there is an image (electrostatic image, toner image) on the photosensitive belt 217 (step S6), and the belt cleaning of the photosensitive belt 217 is performed only when there is an image (step S6). S2b). If there is no image in steps S5 and S6, the process jumps to step S8 without cleaning and notifies the control unit that the power can be shut off.

  Whether there is an image on the photosensitive belt 217 or the intermediate transfer belt 218 is determined by controlling the image forming process by the image forming unit 6 with the process controller 7 and managing the progress of the print job. It can be determined by the controller 7. This determination may be determined by, for example, sensor information used in the image forming unit 6, information on the voltage and current of a circuit that operates the image forming unit 6, and information such as ASIC value conversion used in process control. it can.

  As described above, since cleaning is performed only when it is determined in steps S5 and S6 that there are images on the intermediate transfer belt 218 and the photosensitive belt 217, the power cut-off time is shortened without performing unnecessary processing when the power is cut off. And an extra load supply can be reduced.

As described above, according to the present embodiment,
1) Since the images on the photosensitive belt 217 and the intermediate transfer belt 218 are cleaned when the power is shut off, it is possible to prevent image data from leaking from the images on the photosensitive belt 217 and the intermediate transfer belt 218.
2) The user selects whether or not to execute the security ensuring process in advance, and when the security ensuring process is unnecessary, unnecessary processing is avoided when the power is shut off, so that the power shutdown time can be shortened.
3) Since the user who performs the power-off operation can select whether to prioritize the security process or shorten the power-off time at that time, it is possible to prevent the leakage of confidentiality that meets the user's needs.
4) By performing security processing based on the security level of the print job, security processing is executed only for highly confidential image data, and unnecessary processing is avoided when the power is shut down, reducing the power shutdown time. can do.
5) When it is not necessary to clean the photosensitive belt 217 and the intermediate transfer belt 218, in other words, it is not necessary to secure confidentiality up to the image on the photosensitive belt 217 or the intermediate transfer belt 218, and the image data is deleted. If it is sufficient to do so, the unnecessary processing of image cleaning is not performed, so that the power-off time can be shortened and the extra load supply can be reduced. This is particularly effective when it is desired to shut off the power supply quickly and the photosensitive belt 217 and the intermediate transfer belt 218 need not be cleaned.
6) Since cleaning is performed only when there is an image on the photosensitive belt 217 and / or the intermediate transfer belt 218, unnecessary processing is not performed when the power is cut off, the power cut-off time is shortened, and an extra load is supplied. Reduction is possible.
There are effects such as.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention, and all technical matters included in the technical idea described in the claims are included. The subject of the present invention. The above embodiment shows a preferable example, but those skilled in the art can realize various alternatives, modifications, variations, and improvements from the contents disclosed in this specification, These are included within the scope defined by the appended claims.

DESCRIPTION OF SYMBOLS 6 Image forming unit 7 Process controller 8 Storage area 9 Judgment control part 100 Image forming apparatus 201 Intermediate transfer belt cleaning unit 209 Photoconductor cleaning unit 217 Photoconductor belt 218 Intermediate transfer belt

Japanese Patent Laid-Open No. 2006-139382 JP 2006-174238 A

Claims (9)

An image forming means including an image carrier for forming an image on a recording medium;
Cleaning means for cleaning an image formed on the image carrier;
Storage means for storing image data and job files in a predetermined storage area;
Deleting means for deleting image data and job files stored in a predetermined storage area of the storage means from the storage area;
An image forming apparatus comprising:
An image forming apparatus, wherein when the power is turned off, the image data and the job file are deleted from the storage area by the deleting unit, and the image formed on the image carrier is cleaned by the cleaning unit. The image forming apparatus according to claim 1,
An image forming apparatus, comprising: a priority processing selection unit that preselects whether priority is given to confidentiality processing or reduction in power-off time. The image forming apparatus according to claim 1,
An image forming apparatus comprising: a security ensuring process execution selection unit that selects whether a user who performs a power shutdown operation executes a security ensuring process when the power is shut off. The image forming apparatus according to claim 1,
A security level setting means for setting a plurality of security levels for a print job;
A process execution setting means for setting whether to perform a security process in association with the set confidentiality level when the power is shut off;
An image forming apparatus comprising: The image forming apparatus according to any one of claims 1 to 4, wherein
An image forming apparatus comprising: a cleaning selection unit that selects whether or not an image formed on the image carrier is cleaned by the cleaning unit when the power is shut off. The image forming apparatus according to claim 5, wherein
The image forming apparatus, wherein the cleaning selection unit selects cleaning of the image carrier by the cleaning unit only when there is an image on the image carrier. The image forming apparatus according to claim 5, wherein
The image forming apparatus, wherein the image carrier is a photoconductor or a transfer medium to which an image on the photoconductor is transferred. An image forming means including an image carrier for forming an image on a recording medium;
Cleaning means for cleaning an image formed on the image carrier;
Storage means for storing image data and job files in a predetermined storage area;
Deleting means for deleting image data and job files stored in a predetermined storage area of the storage means from the storage area;
An image leakage prevention method in an image forming apparatus comprising:
A step of deleting the image data and the job file stored in the predetermined storage area by the deleting unit when the power is shut off;
Cleaning the image formed on the image carrier by the cleaning means;
An image leakage prevention method comprising: An image leakage prevention control program for preventing a computer from leaking an image when the image forming apparatus is turned off.
A procedure for deleting image data and job files stored in a predetermined storage area of the storage means when the power is shut off;
A procedure for cleaning the image formed on the image carrier before the power is shut off;
An image leakage prevention control program comprising: