JP6805616B2 - Image forming apparatus, control method of image forming apparatus, and control program of image forming apparatus - Google Patents

Description

The present invention relates to an image forming apparatus, a control method of the image forming apparatus, and a control program of the image forming apparatus.

Various image forming devices using an electrophotographic method have been devised as image forming devices for copiers, facsimiles, printers, etc., and are known techniques. In the image forming process, an electrostatic latent image is formed on the surface of the photosensitive drum, which is an image carrier, and the electrostatic latent image on the photosensitive drum is developed with toner, which is a developer, to make it visible and developed. The image is transferred to a recording medium (hereinafter, also referred to as paper, recording material, recording paper) by a transfer device to support the image, and an unfixed toner image on the recording medium is fixed by a fixing device using pressure, heat, or the like. It is established by the process.

Various types of fixing devices have been proposed. The fixing roller is provided with a fixing roller (fixing member) and a pressure roller that presses against the fixing roller, and the fixing formed by pressure contact between the pressure roller and the fixing roller is provided. A roller fixing method is known in which a recording medium carrying an unfixed toner image is heated and fixed by a nip portion (also referred to as a nip portion) while being sandwiched and conveyed.

Further, it is provided with a fixing roller arranged to face the pressure roller and an endless fixing belt (fixing member) stretched between the fixing roller and the heating roller, and by pressure contact between the pressure roller and the fixing belt. A belt fixing method is known in which an unfixed toner image is pressed against a recording medium and fixed by applying heat of a heating roller to the recording medium through a fixing belt at the formed fixing nip portion.

As a heat source (heater) provided in the fixing roller (roller fixing method) and the heating roller (belt fixing method), for example, a halogen heater is widely used. In addition, heaters are provided on the center side and the end side in the longitudinal direction, and temperature detecting means are provided at positions corresponding to the respective heating regions of each heater, and each heater is made independent based on the detection result of each temperature detecting means. A fixing device that controls heating is known.

In such a fixing device, since the target temperatures of the central heater and the edge heater are set according to the size of the recording medium (paper size), printing should be started until each heater reaches the target temperature. May occur and waiting time may occur. For example, even if the central heater has reached the target temperature, if the end heater has not reached the target temperature, a waiting time occurs. Further, in such a fixing device, a temperature difference may occur between the central heater and the end heater, and uneven gloss may occur.

For example, Patent Document 1 includes an image in which a fixing member, an opposing member that abuts on the fixing member to form a nip portion, and a heating means for heating the fixing member are provided, and the heating means is formed on a recording medium. In an image forming apparatus including a fixing device configured so that the heating range on the recording medium can be changed based on the information, the image area on the recording medium is arranged at a position corresponding to the heat storage pattern on the fixing member. An image forming apparatus to be controlled is disclosed.

In Patent Document 1, by arranging the image region on the recording medium at a position corresponding to the heat storage pattern on the fixing member, the heat stored in the fixing member is effectively utilized for the subsequent fixing process of the recording medium. .. Patent Document 1 discloses that the paper is rotated and the position of one image is adjusted between two or more papers so that heat can be efficiently used. However, depending on the layout of the images. In some cases, a sufficient effect may not be obtained, and a waiting time may occur.

Therefore, an object of the present invention is to provide an image forming apparatus capable of suppressing the occurrence of a waiting time before the heating means of the fixing apparatus reaches the target temperature.

In order to achieve such an object, the image forming apparatus according to the present invention forms an image that forms an image on a recording medium based on an image processing unit that processes image data and the image data processed by the image processing unit. It has a portion, a fixing member heated by two or more heating means for heating each corresponding heating region in the longitudinal direction, and a pressurizing member in contact with the fixing member, and fixes an image on a recording medium. A fixing unit is provided, and the image processing unit identifies an image portion and a non-image portion in the image data, and the image portion is heated to at least one of the two or more heating means according to the identification result. The arrangement is changed to a position that does not require heating by the above heating means.

According to the present invention, it is possible to suppress the occurrence of a waiting time before the heating means of the fixing device reaches the target temperature.

It is a schematic block diagram which shows one Embodiment of the image forming apparatus which concerns on this invention. It is a schematic block diagram which shows one Embodiment of the fixing device. It is a schematic diagram of the fixing roller which has two heaters of a central part heater and an end part heater. This is an example of a functional block diagram of the image forming apparatus. It is a figure explaining each part other than the main body control part and the paper transfer in the functional block shown in FIG. It is explanatory drawing of the print control in the conventional image forming apparatus. It is explanatory drawing about the print control by the image forming apparatus which concerns on this embodiment. It is a flowchart which shows an example of the print control executed by an image forming apparatus.

Hereinafter, the configuration according to the present invention will be described in detail based on the embodiments shown in FIGS. 1 to 8.

The image forming apparatus (image forming apparatus 100) according to the present embodiment is a recording medium (paper P) based on an image processing unit (image processing unit 62) that processes image data and image data processed by the image processing unit. ), And two or more heating means (central heater 6, end heater 7) that heat the corresponding heating regions in the longitudinal direction, and the fixing that is heated by the image forming portion (image forming portion 65). An image processing unit including a member (fixing roller 2), a pressing member (pressurizing roller 3) that comes into contact with the fixing member, and a fixing unit (fixing device 1) that fixes an image on a recording medium. Discriminates between an image portion (image portion Pa) and a non-image portion (non-image portion Pb) in the image data, and heats the image portion by at least one of two or more heating means according to the identification result. The arrangement is changed to a position that does not require heating by means. In addition, the code in parentheses and the application example are shown.

(Image forming device)
An embodiment of the image forming apparatus according to the present invention will be described with reference to FIG. FIG. 1 is a schematic configuration diagram showing an embodiment of an image forming apparatus 100.

In FIG. 1, the reading unit 12 is provided for scanning a document placed on a pressure plate, and is composed of a contact glass 20 on which the document is placed and an optical scanning system. The optical scanning system includes an exposure lamp 13, a first mirror 14, a second mirror 17, a third mirror 18, a lens 15, a CCD image sensor 16, and the like. The original image is read by the CCD image sensor 16 and converted into an electric signal for processing.

In the sheet document automatic scanning device A for automatically scanning the sheet document, the document placed on the platen B is fed to the position of the document scanning sensor G by the feeding roller C. The document passes through the document reading sensor G as it is at a constant speed, and at this time, the image on the surface side of the document is read by the document reading sensor G. The read image data is sequentially stored in the image memory after performing image processing (various corrections, compression, etc.).

The writing unit 49 is composed of a laser output unit 19, an imaging lens 21, and a mirror 22, and the laser beam output from the writing unit 49 is applied to the photoconductor 30 of the image image forming system.

The procedure for printing the image imaged on the photoconductor 30 is roughly as follows. The paper loaded on the first tray 23, the second tray 24, and the third tray 25 is fed by the first paper feed device 26, the second paper feed device 27, and the third paper feed device 28, respectively, and is a vertical transfer unit. The 29 conveys the photoconductor 30 to a position in front of the photoconductor 30.

The image data on the image memory is written on the photoconductor 30 by the laser beam from the writing unit 49, and a toner image is formed by passing through the developing unit 35. The toner image on the photoconductor 30 is transferred while the paper is conveyed by the transport belt 31 at a constant speed with the rotation of the photoconductor 30 as the toner image moves. After that, the image is fixed by the fixing device 1 and discharged to the paper ejection tray 33 by the paper ejection unit 32.

When an image is imaged on both sides, the paper fed from each paper feed tray (first tray 23 to third tray 25) and the imaged paper is switched by the reverse path switching claw. As a result, the paper is not guided to the output tray 33 side, but is conveyed to the double-sided inlet transfer path 38, guided to the reversing unit 37 provided in the double-sided transfer unit 36, and temporarily stored in the switchback transfer path 41. It is fed in the reverse direction (refeeding direction) by the return transport means, guided downward by the reverse paper ejection switching claw, inverted, and fed to the double-sided intermediate transport path 43 provided below the reverse paper ejection switching claw. Then, the intermediate transport means 40 and the double-sided outlet transport means 42 connected to the drive source (motor) send the paper to the vertical transport unit 29 again, print an image on the back surface, and then eject the paper.

Further, when the paper is inverted and ejected, the paper inverted by the switchback unit 37 is sent out to the inverted paper ejection transport path 39 without passing through the double-sided intermediate transport path 43 by the paper ejection reverse switching claw, and then ejected again. It is returned to the paper unit 32 and discharged to the outside of the main body.

The paper ejected from the main body is ejected to either the output tray 33 or the finisher 44 of the main body by the output destination switching claw. The paper discharged to the finisher 44 passes through the punch unit 48 for punching holes, and is once stacked on the stack tray 45 for stapling.

After all the paper is stored in the stack tray, the bundle of paper is stapled by the stapler unit 46 and discharged to the discharge tray 47.

(Fixing device)
FIG. 2 is a schematic configuration diagram showing an example of the fixing device 1. The fixing device 1 is a pressure member (pressurizing roller 3) that abuts the fixing member (fixing roller 2) that heats and melts the toner image and the outer peripheral surface of the fixing member to form a nip portion between the fixing member. ), And a fixing device 1.

Here, the fixing roller 2 as the fixing member is a thin-walled cylinder that rotates in the direction of the arrow in FIG. 2, and heaters 6 and 7 as heat sources (heating means) are fixed inside the cylinder. Has been done. Further, the fixing roller 2 is a multi-layer structure in which an elastic layer and a release layer (surface layer) are laminated in this order on a cylindrical core metal portion, and abutting with the pressure roller 3 forms a nip portion. To do.

The innermost core metal portion of the fixing roller 2 is made of an iron-based material such as SUS304. Heaters 6 and 7 are provided inside the core metal portion of the fixing roller 2.

The fixing roller 2 is heated by heaters 6 and 7 whose output is controlled by a power supply unit included in the image forming apparatus 100, and heat is applied to the toner image T on the paper P from the surface thereof. The output control of the heaters 6 and 7 is performed based on the detection result by the temperature detecting means (thermistor, thermopile, etc.) provided so as to be able to detect the surface temperature of the fixing roller 2. Further, by controlling the outputs of the heaters 6 and 7, the temperature of the fixing roller 2 (fixing temperature) can be controlled to a desired temperature.

As the elastic layer of the fixing roller 2, for example, an elastic material such as fluororubber, silicone rubber, or foamable silicone rubber is used. In particular, when silicone rubber is used as the elastic layer, it is preferable to coat the elastic layer with a fluorine layer in order to improve the swelling resistance. Further, by providing the elastic layer on the core metal of the fixing roller 2, the separability of the paper P after passing through the nip portion is improved, and the glossiness of the output image when forming the color image is improved.

Further, as the release layer of the fixing roller 2, for example, PFA (tetrafluoroethylene verfluoroalkyl vinyl ether copolymer resin), polyimide, polyetherimide, PES (polyether sulfide) or the like can be used. By providing the release layer on the surface layer of the fixing roller 2, the release property (release property) with respect to the toner image T is ensured.

The pressure roller 3 is composed of a core metal portion, an elastic layer, and a mold release layer, and may be configured in the same manner as the fixing roller 2, for example. The pressure roller 3 is pressed against the fixing roller 2 by the pressure means, and a nip portion is formed between the pressure roller 3 and the fixing roller 2.

A guide plate 4 for guiding the transfer of the paper P is provided on the inlet side of the nip portion between the fixing roller 2 and the pressurizing roller 3. The guide plate 4 may be fixed to the side plate of the fixing device 1, for example. Further, a separation plate 5 is arranged near the outlet side of the nip portion at a position facing the outer peripheral surface of the fixing roller 2. The separation plate 5 suppresses a problem that the paper P after the fixing step is wound around the fixing roller 2 along with the rotation of the fixing roller 2. A guide plate for guiding the paper P to the downstream side of the transport path is also provided on the outlet side.

As the heaters 6 and 7, for example, a halogen heater, a carbon heater, a planar heater and the like can be used. Further, the fixing roller 2 may be heated from the outer peripheral side of the fixing roller 2 by using the electromagnetic induction superheating means.

In the present embodiment, as shown in FIG. 3, two heaters (halogen heaters), a central heater 6 (central heating means) and an end heater 7 (end heating means), are provided inside the fixing roller 2. ing. Further, the fixing roller 2 is provided with a temperature detecting means at a position corresponding to each heating region of each of the heaters 6 and 7. In the example of FIG. 3, the central temperature detecting means 8 (non-contact thermistor) is located at a position corresponding to the heating region of the central heater 6, and the end temperature detecting means 9 (contacting) is located at a position corresponding to the heating region of the end heater 7. Thermistor) is provided.

The heaters 6 and 7 are heated and controlled based on the detection results of the temperature detecting means 8 and 9, and the heating can be controlled independently. For example, when the temperature of the end portion is low, uniform heating can be performed over the entire longitudinal direction by appropriately controlling the calorific value or the on-time of the end heater 7.

The heating means may have a configuration in which heating can be controlled independently on the end side and the center portion side of the fixing roller 2, and the heater configuration is not limited to the example of FIG. For example, it may further have a start-up heater used at the time of start-up. Further, in the present embodiment, the central heater 6 and the end heater 7 are divided into two heating regions in the longitudinal direction, but the number of heating regions is not limited to two, for example, the central heater and the middle heater. It may have three heating regions such as an end heater and an end heater.

Further, in the present embodiment, the fixing device of the roller fixing method has been described as an example, but the fixing device 1 to which the configuration of the present invention can be applied is not limited to this, and other configurations such as the belt fixing method are used. Of course, it may be a fixing device.

(Control unit)
FIG. 4 is an example of a functional block diagram of the image forming apparatus 100. Further, FIG. 5 is a diagram illustrating the transfer of the paper P and each unit other than the main body control unit 50 in the functional block shown in FIG.

The image forming apparatus 100 includes a main body control unit 50 that controls each block, and each block is controlled by the main body control unit 50 to execute various operations.

The main body control unit 50 includes a CPU 51 (Central Processing Unit), a ROM 52 (Read Only Memory), a RAM 53 (Random Access Memory), an NVRAM 54 (Non-Volatile Random Access Memory), an ASIC55 (Application Specific Integrated Circuit), and an FPGA 56 (Field Programmable Gate). Array) etc. are installed.

The main body control unit 50 stores a basic program as an image forming apparatus 100, an image forming program, a program for image position change control described later, and other programs and necessary data in the ROM 52. In the main body control unit 50, the CPU (control processor) 51 controls each part of the image forming apparatus 100 by using the RAM 53 as a work memory based on the program in the ROM 52, and the basic processing as the image forming apparatus 100 Is executed, and an image forming process for forming an image is executed.

The NVRAM 54 stores and reads data to be stored under the control of the CPU 51 even when the power of the image forming apparatus 100 is off.

The ASIC 55 performs various signal processing on the image data, image processing such as sorting, and the FPGA 56 processes input / output signals for controlling the entire image forming apparatus 100.

The image forming apparatus 100 includes a ROM, an EPROM (Electrically Erasable and Programmable Read Only Memory), an EPROM, a flash memory, a flexible disk, a CD-ROM (Compact Disc Read Only Memory), a CD-RW (Compact Disc Rewritable), and a DVD (Digital). Read an image forming program that executes an image forming method that forms an image recorded on a computer-readable recording medium such as a Versatile Disk), SD (Secure Digital) card, MO (Magneto-Optical Disc), ROM 52, etc. By introducing it into, it is constructed as an image forming apparatus 100 that executes an image forming method. This image forming program is a computer-executable program written in a legacy programming language such as assembler, C, C ++, C #, Java (registered trademark), an object-oriented blogging language, etc., and is stored in a recording medium. Can be distributed.

In the present embodiment, the CPU 51 mainly performs the image forming process, but an LSI (Large Scale Integration) such as FPGA 56 or ASIC 55 may perform a part or all of the image forming process.

The operation display unit 60 (operation unit) includes various keys necessary for causing the image forming apparatus 100 to perform various operations, and also includes lamps such as a display (for example, a liquid crystal display) and an LED (Light Emitting Diode). .. When various operations for causing the image forming apparatus 100 to perform various function operation processes are performed from the operation keys, the operation display unit 60 passes the operation contents to the main body control unit 50. Further, the operation display unit 60 causes the display to display the display information passed from the main body control unit 50, that is, the command contents input from the operation keys and various information notified to the user from the image forming apparatus 100. In addition, the operation display unit 60 performs various setting operations necessary for the image formation process.

The image recognition unit 61 scans the document, recognizes it as image data, and stores it (reading unit 12).

The image processing unit 62 performs image processing on the image data of the document read by the image recognition unit 61. In addition, the image processing unit 62 controls to change the position of the image portion described later. The image processing unit 62 may be configured as a part of the main body control unit 50.

The paper feed unit 63 feeds the paper P loaded on the paper feed trays (first tray 23 to third tray 25) (first paper feed device 26 to third paper feed device 28).

The transport unit 64 transports the paper P fed to the paper feed unit 63 from the paper feed unit 63 to the paper discharge unit (paper discharge tray 33) (vertical transport unit 29, transport belt 31, etc.).

The image forming unit 65 forms an image on the conveying path with respect to the paper P conveyed by the conveying unit 64 (photoreceptor 30, developing unit 35, etc.).

(Image position change control)
Hereinafter, the image position change control by the image processing unit 62 of the image forming apparatus 100 will be described. FIG. 6 is an explanatory diagram of print control by the conventional image forming apparatus, and FIG. 7 is an explanatory diagram of printing control by the image forming apparatus 100 according to the present embodiment.

As shown in FIG. 6 (A), with respect to the paper P to be used, there is a document (image portion Pa) only in the upper left portion and a margin (non-image portion Pb) in the other portion, that is, the image recognition unit. Consider a case where the image portion Pa occupies a small proportion and the non-image portion Pb occupies a large proportion in the image read in 61. For example, it corresponds to a case where a card size such as a business card or a driver's license or a small document size such as a postcard is read and printed on non-small size paper (A4 size or the like).

Here, the heating regions of the heaters 6 and 7 of the fixing device 1 corresponding to the paper P to be used are the boundaries shown in FIG. 6B. Since the image portion Pa straddles both the heating region of the central heater 6 and the heating region of the end heater 7, when printing this document, both the central heater 6 and the end heater 7 have target temperatures. Must be reached, and there may be a waiting time for temperature rise. Further, in such a case, most of the heating region by the end heater 7 is a non-image portion (margin portion), so that the heat utilization efficiency is not good.

Therefore, in the image forming apparatus 100 according to the present embodiment, the image processing unit 62 that recognizes the document read by the image recognition unit 61 as image data first includes an image portion Pa and a non-image portion Pb on the paper P to be printed. (Fig. 7 (A)). Then, when the image portion Pa fits within the heating region of the central heater 6, the position is changed so that the entire image portion Pa fits within the heating region of the central heater 6, as shown in FIG. 7B. Control. Then, printing is controlled at the position of the changed image portion Pa.

As shown in FIG. 7C, by rearranging the image portion Pa in the center when there is a margin, the fixing operation can be performed only by the central heater 6. In this case, since the central heater 6 only needs to reach the target temperature, the waiting time for temperature rise can be reduced.

In the example of FIG. 7, the image portion Pa is shifted in the paper width direction to change the position, but when the image portion Pa is simply shifted in the paper width direction, the image portion Pa heats the central heater 6. Even if it does not fit in the area, if the image part Pa fits in the heating area of the central heater 6 by changing the angle of the image part Pa (for example, rotating it by 90 °), the angle is changed. It is preferable to perform the movement together with the movement.

The image position change control by the image forming apparatus 100 according to the present embodiment changes the layout of the image portion, and is suitable for the following cases, for example.
(1) As described above, when the size of the paper to be printed is large compared to the size of the original.
It is also suitable for (2) post-processing such as punch hole processing and staple processing with the finisher 44. That is, when post-processing such as punch hole processing or staple processing is performed, there is a possibility that a post-processing operation is executed on the image portion. In this case, it is conceivable to change the position of the image portion to the center side and perform printing so that the image portion does not cover the post-processing position.

If the paper (paper tray) used for printing is not selected and automatic paper selection is selected, the image portion of the paper set in the paper feed unit 63 is combined with the above position change control. It is preferable to choose a larger and smallest size. This makes it possible to further reduce unnecessary margins.

FIG. 8 is a flowchart showing an example of image position change control executed by the image forming apparatus 100.

When printing is started, the image processing unit 62 determines whether or not the image data read by the image recognition unit 61 is a document having a large margin (S101). In this determination, it is determined whether or not the image portion in the image data read by the image recognition unit 61 fits in the heating region of the central heater 6.

When the document has a large margin (S101: Yes), it is determined whether or not the paper feed tray (that is, the paper size) is selected (S102).

When the paper feed tray is not selected (S102: No), a tray larger than the original image and loaded with the smallest size paper is selected (S103).

After the processing of S103, or when the paper feed tray is selected in S102 (S102: No), the image portion other than the margin of the document is rearranged in the center (S104). If it fits in the heating region of the central heater 6, it does not necessarily have to be in the central position. Next, it is determined whether or not the central heater 6 has reached the target temperature (S106).

In the determination of S101, when there are many margins in the image data (that is, the image portion does not fit in the heating region of the central heater 6) (S101: No), the end heater 7 has reached the target temperature. Therefore, it is determined whether or not the end heater 7 and the center heater 6 have reached the target temperature (S105, S106). In this case, the judgment of S105 and S106 does not matter.

When the central heater 6 has reached the target temperature (S106: Yes), the image forming unit 65 executes the image drawing and the fixing operation 1 (S107), and the printing is completed.

According to the image forming apparatus 100 according to the present embodiment described above, in the image forming apparatus 100 including the fixing apparatus 1 in which heating in the heating region in the paper width direction is independently controlled by a plurality of heating means, the fixing apparatus 1 is used. It is possible to reduce the waiting time for the temperature rise of the heating means. In addition, heat utilization efficiency can be improved to save energy. In addition, it is possible to reduce the occurrence of uneven gloss that may occur due to the boundary of the heating region of the heater.

For example, in a configuration in which the fixing device 1 includes a central heater 6 having a heating region on the center side in the paper width direction and end heaters 7 having heating regions on both ends, printing is performed when printing a read image portion. When there is a sufficient margin for the paper to be printed, the image portion is rearranged in the central portion and only the central portion heater 6 is used, so that the waiting for the temperature rise of the end heater 7 can be eliminated.

Although the above-described embodiment is a preferred example of the present invention, the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention.

For example, in the above embodiment, an example of changing and controlling the position of the image portion in the heating region of the central heater 6 has been described. However, for example, when a large size paper is used and the image portion is small, both image portions are used. When the image portion exists over the image region of the above and the image portion can accommodate only the image region by the end heater 7, the image processing unit 62 controls the position change of the image portion to the end side. , The image portion may be accommodated only in the image area by the end heater 7.

Further, when the number of heating regions is divided into 3 or more in the longitudinal direction, the image position may be changed so that heating by at least 1 or more heaters is unnecessary.

Further, it is preferable that the user can set whether or not to execute the above-mentioned image position change control (on / off of the image position change control) from the operation display unit 60.

1 Fixing device 2 Fixing roller 3 Pressurizing roller 4 Guide plate 5 Separation plate 6 Central heater 7 End heater 8 Central temperature detecting means 9 End temperature detecting means 12 Reading unit 13 Exposure lamp 14 First mirror 15 Lens 16 CCD Image sensor 17 2nd mirror 18 3rd mirror 19 Laser output unit 20 Contact glass 21 Imaging lens 22 Mirror 23 1st tray 24 2nd tray 25 3rd tray 26 1st paper feed device 27 2nd paper feed device 28 3rd Paper feed device 29 Vertical transport unit 30 Photoreceptor 31 Transport belt 32 Paper discharge unit 33 Paper discharge tray 35 Development unit 36 Double-sided transport unit 37 Inverting unit 38 Double-sided inlet transport path 39 Reversed paper discharge transport path 40 Intermediate transport means 41 Switchback transport Road 42 Double-sided outlet transport means 43 Double-sided intermediate transport path 44 Finisher 45 Stack tray 46 Stapler unit 47 Discharge tray 48 Punch unit 49 Writing unit 50 Main body control unit 51 CPU
52 ROM
53 RAM
54 NVRAM
55 ASIC
56 FPGA
60 Operation display unit 61 Image recognition unit 62 Image processing unit 63 Feeding unit 64 Transport unit 65 Image forming unit 100 Image forming device A Sheet document automatic scanning device B Document stand C Feeding roller G Document reading sensor P Paper T Toner image

Japanese Unexamined Patent Publication No. 2014-153505

Claims (6)

An image processing unit that processes image data and
An image forming unit that forms an image on a recording medium based on the image data processed by the image processing unit, and an image forming unit.
A fixing portion having a fixing member heated by two or more heating means for heating each corresponding heating region in the longitudinal direction and a pressing member in contact with the fixing member, and fixing an image on a recording medium. With,
The two or more heating means include a central portion heating means that heats the central side in the longitudinal direction of the fixing member and an end heating means that heats both end sides.
The image processing unit distinguishes between an image portion and a non-image portion in the image data , and changes the arrangement of the image portion to a position corresponding to a heating region by the central portion heating means according to the identification result. An image forming apparatus characterized in that. Equipped with a paper feed unit that feeds multiple types of recording media
When the recording medium to be used is not set, the image forming unit forms an image on the recording medium having the smallest size among the recording media on which the image portion can be printed, according to the identification result of the image processing unit. The image forming apparatus according to claim 1 , wherein the image forming apparatus is used. The image forming apparatus according to claim 1 or 2 , wherein the image processing unit changes the angle of the image portion and then changes the arrangement according to the identification result. The image forming apparatus according to any one of claims 1 to 3 , further comprising an operation unit for setting on / off of rearrangement of the image portion in the image processing unit. In the longitudinal direction, it has a fixing member that is heated by two or more heating means that heat the corresponding heating regions, and a pressing member that abuts on the fixing member to form a nip portion, and an image is displayed on a recording medium. In the control method of the image forming apparatus provided with the fixing portion for fixing
The two or more heating means include a central portion heating means that heats the central side in the longitudinal direction of the fixing member and an end heating means that heats both end sides.
It is characterized in that an image portion and a non-image portion in the image data are identified, and the arrangement of the image portion is changed to a position corresponding to a heating region by the central portion heating means according to the identification result. Control method of the image forming apparatus. In the longitudinal direction, it has a fixing member that is heated by two or more heating means that heat the corresponding heating regions, and a pressing member that abuts on the fixing member to form a nip portion, and an image is displayed on a recording medium. In the control program of the image forming apparatus provided with the fixing portion for fixing
The two or more heating means include a central portion heating means that heats the central side in the longitudinal direction of the fixing member and an end heating means that heats both end sides.
A process of causing a computer to distinguish between an image portion and a non-image portion in the image data and changing the arrangement of the image portion to a position corresponding to a heating region by the central portion heating means according to the identification result is executed. A control program for an image forming apparatus, characterized in that the image is formed.