JP6834037B2 - Printing device, control method and program of printing device - Google Patents

Description

The present invention relates to a printing device to reduce the possibility of performance degradation due to the detection of the paper type for printing resumes from a state of no longer paper during printing occurs, a control method and program of the printing apparatus.

An image forming apparatus such as a printer receives a print job from an external device such as a PC, and is set in the paper feed setting information (paper setting information, cassette designation) described in the received print job and the cassette of the image forming apparatus. Compare with the existing paper setting information. Then, as a result of comparison, the image forming apparatus selects a cassette in which appropriate paper is loaded (a paper feed port including the bypass tray is referred to as a cassette) and executes printing. The paper setting information of each cassette includes the paper size and paper type (plain paper, thick paper, etc.), and the image forming apparatus adjusts the paper transport speed and toner fixing temperature of the printing unit to execute printing. To do.
There are cases where the paper setting information of each cassette is set manually by the user and cases where the image forming apparatus automatically sets the paper set by the sensor. Conventionally, there is an image forming apparatus that automatically detects the paper size by a sensor, but in recent years, an image forming apparatus that can automatically detect a paper type (plain paper, thick paper, etc.) by a sensor has also appeared. This paper type detection enhances the convenience of the image forming apparatus without the user having to manually set the paper when the paper is loaded in the cassette. However, this paper type detection is performed while the paper is being fed from the cassette and being conveyed, not in the state where the paper is set in the cassette. Therefore, the paper type is detected in the subsequent print jobs after the user sets the paper in the cassette, and the detection result is registered as the paper setting information of the cassette. The registered paper setting information is deleted when there is a possibility that the paper has been replaced, such as opening / closing the cassette or turning the power off / on, and it is necessary to perform paper type detection again. However, performing paper type detection during printing can reduce performance. When the paper type is not detected, the image is created according to the paper type already set by the user, so that the image creation can be started before the paper is fed from the cassette. However, when performing paper type detection, after transporting the paper to the position of the sensor, the paper type is detected before image creation is started, so there is a time to wait for the image creation to be completed, and performance is improved. May decrease. This performance degradation is more likely to occur at feed ports far from the sensor position.
In order not to reduce the performance in such a case, Patent Document 1 detects the paper type in advance when printing with the setting to print with the specified paper type, not when the paper type is automatically detected. The technology to keep is presented.

JP-A-2009-265627

In the case of Patent Document 1, it is necessary to change from the setting for automatically detecting the paper type to the setting for printing with the specified paper type after turning the power off / on or opening and closing the cassette. In addition, if printing is performed with the setting for automatically detecting the paper type, the paper type may be detected and the performance may deteriorate. If the cassette is opened and closed while printing is not in progress, there is a high possibility that the paper has been replaced with another paper. Therefore, if printing is performed without performing paper type detection, image defects due to improper temperature control and fixing may occur. It can occur.
However, if the paper runs out during printing and the paper is refilled, there is a high possibility that the same paper will be refilled. In such a case, there is a high possibility that there will be no problem if printing is performed using the same paper type as before printing, but if paper type detection is performed in the same manner, performance may be unnecessarily reduced.
The present invention aims to reduce the likelihood of poor performance is generated by the detection of the paper type for printing resumes from the state in which the paper has run out during printing.

Therefore, the printing apparatus of the present invention detects by the paper storage unit, the transport means for transporting the paper from the paper storage portion, the detection means for detecting the type of the paper transported by the transport means, and the detection means. It is a printing apparatus having a registration means for registering the type of paper as the type of paper stored in the paper storage unit and a printing means for printing based on the type of paper registered by the registration means. Then, based on the detection means for detecting the change in the open / closed state of the paper storage unit and the detection means for detecting the change in the open / closed state of the paper storage unit, the paper to be conveyed next is used. Has a control means for registering the type of paper as the type of paper stored in the paper storage unit by the registration means, and the control means stores the paper for which a change in the open / closed state is detected by the detection means. If the section is a paper storage section used in a print job that is interrupted without paper, then the next conveyed paper is used to set the paper type as the type of paper stored in the paper storage section. It is characterized in that it is not in a state of being registered by the registration means .

According to the present invention, it is possible to reduce the possibility that the performance is deteriorated due to the detection of the paper type when printing is restarted from the state where the paper is exhausted during printing.

It is a figure which shows an example of the system configuration of a printing system. It is sectional drawing of a printer. It is a figure which shows the paper type registration using the paper type detection. It is a figure which shows an example of the hardware composition of the controller unit of a printer. It is a flowchart which shows an example of information processing from receiving a print job to executing printing. It is a flowchart which shows an example of the initialization processing of the paper type detection result information. It is a flowchart (the 1) which shows an example of a cassette open confirmation process. It is a figure (the 1) which shows an example of the paper type detection result information. It is a figure which shows an example of UI. It is a flowchart (2) which shows an example of a cassette open confirmation process. It is a figure (the 2) which shows an example of the paper type detection result information. It is a flowchart (3) which shows an example of a cassette open confirmation process.

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

<Embodiment 1>
The printer 103 has a paper size and a paper type as the paper setting information of the cassette, and is registered by manual registration by the user or automatic registration by automatic detection, respectively. In the present embodiment, even in the case of automatic registration, the paper size is always in the registered state because automatic detection is performed when the paper is set. On the other hand, in the case of automatic registration of the paper type, there is an unregistered state during the period from the initial state in which the paper is set until the paper type detection is performed. The definition that the paper type is unregistered will be described later in FIG.
FIG. 1 is a diagram showing an example of a system configuration of a printing system. The printer 103 is connected to the PC 102 by USB or NETWORK. The user 101 can give an arbitrary setting or print instruction to the printer 103 by giving an instruction from an application running on the PC 102.

FIG. 2 is a cross-sectional view of the printer 103. The printer 103 includes a paper cassette 203, an image forming unit 207, a main transport path 240, a discharge transport path 241, a reverse transport path 242, and a double-sided unit 230. In addition, the printer 103 includes a plurality of rollers, for example, a feeding roller 202, a resist roller 204, and a discharging roller 220, in order to transport paper in each transport path. Further, the printer 103 includes a plurality of sensors for detecting the paper in the apparatus, for example, a paper presence / absence sensor 201, a registration sensor 205, a paper detection sensor 206, an ejection sensor 208, and a paper type detection sensor 209.
The paper cassette 203 functions as a feeding means and supplies paper for forming an image into the apparatus.
The image forming unit 207 includes an exposure unit, a photoconductor drum, and a developing unit in order to form an image on paper. The image forming unit 207 forms an electrostatic latent image on the photoconductor drum as an image carrier by the exposure unit. This electrostatic latent image is formed according to the image data received by the controller unit 413 described later. The formed electrostatic latent image is developed by a developing unit and transferred to paper at a predetermined transfer position. The fixing device fixes the toner image formed on the paper by heating and pressurizing.

The main transport path 240 is a transport path that is arranged from the feed roller 202 to the discharge roller 220 and forms an image on paper. The discharge transport path 241 is arranged from the discharge roller 220 to the outside of the printer 103, and is a transport path for discharging the paper to the outside of the machine. Further, the discharge transport path 241 is also a transport path for transporting the paper having an image formed on the surface to the reverse transport path 242 when printing on both sides of the paper. The reversing transport path 242 is arranged from the discharge roller 220 to the resist roller 204, and is a transport path for supplying the paper whose front and back sides are reversed to the main transport path 240.
The feeding roller 202 conveys the paper placed in the paper cassette 203 one by one into the apparatus. The resist roller 204 is a roller that adjusts the timing at which the image forming unit 207 transfers an image of the conveyed paper. The discharge roller 220 is a roller for discharging paper to the outside of the machine. Further, when printing on both sides of the paper, the discharge roller 220 transports the paper having an image formed on the surface to the discharge transport path 241 and then rotates in the reverse direction to transport the paper to the reversing transport path 242.

The paper presence / absence sensor 201 is a sensor that detects the presence / absence of paper placed in the paper cassette 203. The resist sensor 205, the paper detection sensor 206, and the discharge sensor 208 detect the conveyed paper. These sensors may be mechanically configured switches or optically configured sensors. The resist sensor 205 is used to adjust the transfer timing between the conveyed paper and the toner image formed on the photoconductor drum. The resist sensor 205 is also used to measure the length of the paper in the sub-scanning direction. The length of the paper in the sub-scanning direction is obtained from the time during which the resist sensor 205 detects the conveyed paper and the transfer speed of the paper. The paper detection sensor 206 is used to detect the presence or absence of paper at both ends of the main transport path 240 and to determine the length of the paper in the main scanning direction.
The paper type detection sensor 209 is a sensor for detecting surface properties such as paper thickness and paper roughness. For example, the paper type detection sensor 209 provided on the back side of the paper determines the thickness of the paper from the waveform of the ultrasonic signal applied from the front side of the paper. Further, the paper type detection sensor 209 determines the surface property from the waveform of the signal of the reflected light of the light applied from the front side of the paper. When the paper type detection is performed, after the paper is fed from the paper cassette 203, the paper type is determined from the thickness and surface properties of the paper measured by the above method at the position of the paper type detection sensor 209.

FIG. 3 is a diagram showing paper type registration using paper type detection. FIG. 3 shows an operation of performing paper type detection and registering the paper type according to the print job from the state where the paper setting information (paper type) of the cassette of the printer 103 is not registered. The printer 103 has four cassettes. The paper setting information 301, 302, and 303 indicate the status of the paper setting information set in the cassette of the printer 103. In cassette 1 of the paper setting information 301, A4 is registered as the paper size, automatic detection is set as the paper type, and plain paper 1 which is the previous detection result is registered. After that, the paper is exchanged, and after the cassette 1 is opened and closed, the paper setting information changes to the paper setting information 302, the paper size is LTR registered, and the paper type is unregistered. After that, when the printer 103 receives the print job and feeds the paper from the cassette 1 to print, the paper type detection is performed and the paper setting information changes to the paper setting information 303. As a result, the paper type of the cassette 1 of the paper setting information 303 is in a state in which the plain paper 3 of the detection result is registered.

FIG. 4 is a diagram showing an example of the hardware configuration of the controller unit 413 of the printer. The controller unit 413 inputs / outputs image data and device information by connecting to the printer unit 411 that functions as an image output device. The CPU 401 is a processor that controls the entire system. The RAM 403 is a system work memory for operating the CPU 401, a program memory for recording a program, and an image memory for temporarily recording image data. The NVMEM404 is a non-volatile memory and records setting information and the like. However, NVMEM404 may be another storage device such as an HDD. The operation unit 416 holds a key for the user to operate the device and an LED indicating the state of the device. The operation unit I / F 415 is an interface unit with the operation unit 416, and transmits control information of the LED held by the operation unit 416. Further, the operation unit I / F 415 plays a role of transmitting the information input by the user from the operation unit 416 to the CPU 401. The display unit 417 displays a message notifying the user of the status of the printer unit 411, and displays information input by the user. The FLASHROM 402 is a rewritable non-volatile memory in which various control programs for controlling the system are recorded. The USB interface 406 enables a USB connection with an external device. The LAN interface 414 enables a LAN connection with an external device. The above devices are arranged on the system bus 405. The function of the printer 103 and the processing of the flowchart described later are realized by the CPU 401 executing the processing based on the program recorded in the FLASHROM 402 or the like and read out in the RAM 403.
The image bus (IMAGE BUS) I / F 407 is a bus bridge that connects the system bus 405 and the image bus 412 that transfers image data at high speed, and converts the data structure. The image bus 412 is composed of a PCI bus or IEEE 1394. The following devices are arranged on the image bus 412.

The raster image processor (RIP) 408 expands vector data such as a PDL code into a bitmap image. The printer I / F 410 connects the printer unit 411 and the controller unit 413 to perform synchronous / asynchronous conversion of image data, transmission / reception of control commands, and power supply. The image processing unit 409 corrects, processes, and edits the input image data, and corrects, converts the resolution, and the like of the print output image data. In addition to this, the image processing unit 409 rotates the image data and performs compression / decompression processing such as JPEG for the multi-valued image data and JBIG, MMR, MH for the binary image data. The print control unit 418 analyzes the input image data and its print setting information. Further, the print control unit 418 compares the state of the printer unit 411 and the setting information held in the NVMEM 404 with the input image data and its print setting information. Then, the print control unit 418 stops the print execution when it is inappropriate to execute the print, and notifies the CPU 401 to display an error on the display unit 417. For example, the print control unit 418 executes the following processing when the cassette 1 is specified in the print setting information of the input image data and the plain paper is set as the paper type. That is, the print control unit 418 notifies the CPU 401 of an error indicating that the paper needs to be replaced if the paper type setting information of the cassette 1 held in the NVMEM 404 is not plain paper.
In addition, the print control unit 418 receives information such as which page has been printed from the printer unit 411, and manages the progress of printing. The printer unit 411 is a part that converts raster image data into an image on paper. The method includes an electrophotographic method using a photoconductor drum and a photoconductor belt, an inkjet method in which ink is ejected from a minute nozzle array and an image is printed directly on paper, but any method may be used. The print control unit 418 starts the printing operation according to the instruction from the CPU 401.

FIG. 5A is a flowchart showing an example of information processing from when the printer 103 is powered on to when a print job is received and printing is executed.
When the power is turned on, the CPU 401 initializes the paper type detection result information on the RAM 403 of all the paper cassettes held by the printer 103 (S501, S502). It is desirable that the paper type detection result information is initialized when the paper in the paper cassette 203 may have changed, and in the present embodiment, it is when the power is turned on and when the paper cassette 203 is opened.
The initialization process of the paper type detection result information of S501 will be described with reference to FIG. 5B. The paper type detection result information of each paper cassette includes two pieces of information shown in FIG. 6, and initializes these pieces of information held on the RAM 403 (S530 to S533).
More specifically, the CPU 401 acquires from a non-volatile storage area such as NVMEM404 whether or not there is a performance decrease due to the paper type detection (S530). Next, the CPU 401 sets the number of times of paper type detection to zero (S531). Next, the CPU 401 sets the paper type detection result 601 as an initial value (S532). Next, the CPU 401 sets the paper type detection confirmation result as the initial value (S533). Here, the paper type detection result 601 is the paper type detected as a result of performing the paper type detection. The paper type detection result holding flag 602 is a flag indicating that the paper type detection result 601 is not initialized and is held even if the cassette is opened when the paper is exhausted during printing and the paper is replenished and printing is restarted. Is. Details of the paper type detection result holding flag 602 will be described later.

Further, the detection of whether or not the paper cassette 203 has been opened is always performed in parallel with the process described in the flowchart of FIG. 5A, and the process is shown in FIG. 5C. The CPU 401 constantly monitors whether or not the paper cassette 203 has been opened by inquiring to the printer unit 411 through the printer I / F 410 (S540). If No is determined in S540, the CPU 401 does nothing, and after a certain period of time, performs the processing of S540 again at the time of the next cassette open processing confirmation processing.
If it is determined to be Yes in S540, the CPU 401 receives a paper type detection result clear notification held by the printer unit 411 from the printer unit 411 (S541).
Then, the CPU 401 determines whether or not the opened cassette is the cassette currently used in the job (S542).
When it is determined Yes in S542, the CPU 401 determines whether the print job is interrupted due to the lack of paper (S543).
If it is determined to be Yes in S543, it is considered that there is a high possibility that the same paper will be replenished even if the cassette is opened and closed because printing is in progress. Therefore, the CPU 401 ignores the paper type detection result clear notification from the printer unit 411 and continues to hold the paper type detection result 601 when the previous paper type detection is performed without initializing (S544).
Further, the CPU 401 turns on the paper type detection result holding flag 602 in the opened cassette (S545).
If No is determined in S542 and S543, the CPU 401 initializes the paper type detection result 601 of the opened cassette (S546).

Returning to the description of the flowchart of FIG. 5A.
The CPU 401 monitors whether or not a print job has been received (S503).
When it is determined Yes in S503, the CPU 401 instructs the print control unit 418 to analyze the received job data (S504). By analyzing, the size and type of paper specified by the user and the information of the cassette can be known, and the CPU 401 saves the analysis result in the RAM 403. If No is determined in S503, the CPU 401 repeats the process of S503.
The CPU 401 selects an appropriate cassette for feeding from the paper size and type specified by the user and the paper setting information of the cassette analyzed by the print control unit 418 (S505). At this time, if the paper type is "automatic" as the paper setting information of the cassette, the CPU 401 detects the paper type as described with reference to FIG. 3 and registers it in the paper setting information of the cassette. The registered paper type is the paper type detection result 601. Hereinafter, an operation example when the paper type is "automatic" will be described as the paper setting information of the cassette.
After the paper feed port is selected in S505, the CPU 401 determines whether the paper type of the selected paper feed port has been detected (S506). If the paper type detection result 601 is not initialized, the CPU 401 determines that the paper type has been detected.

If the paper type has not been detected in S506, the paper type is "automatic" as the paper setting information of the cassette. Therefore, it is not possible to determine which paper type should be used for printing unless the paper type is detected. Therefore, if the paper type has not been detected (No in S506), the print control unit 418 specifies "Auto" as the paper type to the printer unit 411 and gives a print instruction (S507).
Upon receiving the print instruction in which "Auto" is specified as the paper type in S507, the printer unit 411 detects the paper type and prints according to the detected paper type (S508). Here, in the present embodiment, specifying "Auto" as the paper type is an instruction to execute the paper type detection to the printer unit 411, but the method of instructing the paper type detection may be another method. Good.
When the paper type detection is performed in S508, the printer unit 411 notifies the paper type detection result, so that the CPU 401 saves the notified paper type detection result in the paper type detection result 601 (S509).

If the paper type has been detected (Yes in S506), the CPU 401 confirms whether the paper type detection result holding flag 602 is ON (S510). If the paper type detection result holding flag 602 is OFF in S510, the CPU 401 can determine that it is not the time to resume printing when the paper runs out during printing. Therefore, in accordance with the paper setting information "automatic" of the cassette, the print control unit 418 specifies "Auto" as the paper type to the printer unit 411 and gives a print instruction in the same manner as in S507 (S511).
Since the paper type detection has already been performed, the printer unit 411 does not perform the paper type detection, and prints using the detected paper type detection result held by the printer unit 411 (S512). ..
If the paper type detection result holding flag 602 is ON in S510, the CPU 401 can determine that it is time to resume printing when the paper runs out during printing. At this time, the print control unit 418 specifies the paper type held as the paper type detection result 601 as the paper type to the printer unit 411 and gives a print instruction (S513).
Upon receiving a print instruction in which a paper type other than "Auto" is specified as the paper type in S513, the printer unit 411 prints using the designated paper type without performing the paper type detection (S514).
By performing this process, it is possible to prevent performance degradation due to paper type detection when printing is resumed when the paper runs out during printing.

When the printing of one page is completed in S509, 512, and 514, the CPU 401 determines whether the printing job is completed (S515).
When it is determined that the print job is not completed (No in S515), the CPU 401 determines whether or not the paper has run out (S516). The CPU 401 detects the presence or absence of paper with the paper presence / absence sensor 201.
When there is paper (No in S516), the CPU 401 performs the processing after S506 again, and further prints one page.
When there is no paper (Yes in S516), the CPU 401 confirms whether the paper has been replenished and printing can be resumed (S517). If it is determined that printing cannot be resumed (No in S517), the CPU 401 repeats the processes S516 and S517 until the paper is replenished and printing can be resumed. When it is determined that the paper is replenished and printing can be resumed (Yes in S517), the CPU 401 performs the paper feed port determination process of S505 again and restarts the printing job.

When it is determined that the print job is completed (Yes in S515), the CPU 401 confirms whether the paper type detection result holding flag is ON (S518). When the paper type detection result holding flag is ON, it means that the paper type detection is not performed after the cassette is opened.
When the paper type detection result holding flag is ON (Yes in S518), the CPU 401 initializes the paper type detection result information of the cassette used in the job at the end of the job (S519). On the other hand, when the paper type detection result holding flag is OFF (No in S518), the CPU 401 returns the process to S503.
The CPU 401 also turns off the paper type detection result holding flag (S520).
Then, the CPU 401 returns the process to S503.
By performing these initializations, the paper type is detected at the beginning of the next job, so printing according to the appropriate paper type becomes possible.
In this embodiment, the paper type detection result information is initialized in S518, 319, and 520 after the job is completed. This is because the paper may have changed due to the opening and closing of the cassette. However, as described above, even if the cassette is opened and closed after the paper runs out during printing, it is highly likely that the same paper will be replenished because the printing is in progress.
Therefore, assuming that the paper type in the cassette is the same as the previous paper type detection result, the CPU 401 may not perform the processing of S518, 319, and 520. In this case, the paper type detection result information is initialized when the power is turned off / on or the cassette is opened / closed separately.

<Embodiment 2>
In the first embodiment, when printing is resumed when the paper runs out during printing, the process of preventing the performance degradation due to the paper type detection (the process of retaining the previous paper type detection result performed in S544 and 545) is performed. If so, it was always carried out. However, if the paper type is changed without detecting the paper type after opening and closing the cassette, there is a risk that image defects or the like may occur due to the inability to fix the paper with an appropriate temperature control.
Therefore, a UI (screen) that allows the user to select whether to prioritize speed or image quality may be provided, and processing may be switched according to the setting information. An example of the UI is shown in FIG. The UI is displayed on the display unit 417 under the control of the CPU 401. The user can select the check box of "Prioritize speed" 701 or "Prioritize image quality" 702 on the operation unit 416 and press the OK button. As a result, the CPU 401 saves the setting information of "priority is given to speed" or "priority is given to image quality" in NVMEM404.

FIG. 8 is a flowchart showing an example of the cassette open confirmation process of the second embodiment. Since the processes shown in FIGS. 5A and 5B are the same as those in the first embodiment, the description thereof will be omitted. Further, with reference to FIG. 8, only the difference from FIG. 5C will be described.
The processing of S840 to S842 is the same as the processing of S540 to S542. In the case of Yes in S842, the CPU 401 determines from the information held in the NVMEM 404 whether speed priority or image quality priority is selected in the UI shown in FIG. 7 (S843). When it is determined that the speed is prioritized (Yes in S843), the CPU 401 proceeds to the processing of S844, but the processing of S844 is the same as the processing of S543, and the processing of S844 to S846 is also the same as the processing of S543 to S545. is there.
When it is determined that the image quality is prioritized (No in S843), the CPU 401 initializes the paper type detection result information of the corresponding cassette in order to always perform the paper type detection after opening and closing the cassette (S847).
By doing so, if the user wants to prioritize the image quality, the paper type detection can be performed without fail after opening and closing the cassette.

<Embodiment 3>
In the first embodiment, when printing is resumed when the paper runs out during printing, the process of preventing the performance degradation due to the paper type detection (the process of retaining the previous paper type detection result performed in S544 and 545) is performed. If so, it was always carried out. However, in the case of a cassette whose performance does not deteriorate even if the paper type detection is performed, it is preferable to perform the paper type detection because the risk as described in the second embodiment is reduced.
Therefore, in addition to the paper type detection results 601 and 602 described in the first embodiment, the presence / absence of performance degradation due to paper type detection 903 may be added, and the processing may be switched depending on the presence / absence of performance degradation due to paper type detection. Presence / absence of performance degradation due to paper type detection 903 indicates whether the cassette has performance degradation when paper type detection is executed. For example, it is assumed that the presence / absence of performance degradation 903 is set in advance, and the value is not initialized even in processing such as initialization of the paper type detection result information. An example of the paper type detection result information in the third embodiment is shown in FIG. Note that 901 and 902 in FIG. 9 are the same as those in 601 and 602 in FIG. 6, respectively. The values of "None" and "Yes" of the performance deterioration presence / absence 903 may be changed by the CPU 401 according to the user operation via the UI displayed on the display unit 417. The presence / absence of performance deterioration 903 is an example of the presence / absence information of whether or not the performance is deteriorated by detecting the paper type for each cassette.

FIG. 10 is a flowchart showing an example of the cassette open confirmation process of the third embodiment. Since the processes shown in FIGS. 5A and 5B are the same as those in the first embodiment, the description thereof will be omitted. Further, with reference to FIG. 10, only the difference from FIG. 5C will be described.
The processing of S1040 to S1042 is the same as the processing of S540 to S542. If Yes in S1042, the CPU 401 determines whether the cassette has a performance degradation due to paper type detection (S1043). The CPU 401 makes a determination in S1043 based on the presence / absence of performance deterioration due to paper type detection 903. When it is determined that there is a performance degradation (Yes in S1043), the CPU 401 proceeds to the process of S1044, but the process of S1044 is the same as the process of S543, and the process of S1044 to S1046 is the same as the process of S543 to S545. is there.
When it is determined that there is no performance deterioration (No in S1043), the CPU 401 initializes the paper type detection result information of the corresponding cassette because there is no performance deterioration even if the paper type detection is performed after opening and closing the cassette (S1047).

By doing so, in the case of a cassette with no performance degradation, paper type detection is always performed after opening and closing the cassette, so there is a risk of image defects due to failure to fix at an appropriate temperature control without degrading performance. It can be reduced.

<Other Embodiments>
The present invention supplies a system or device via a network or storage medium with a program that realizes one or more functions of the above-described embodiment. It can also be realized by a process in which one or more processors in the computer of the system or apparatus reads and executes a program. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

Although the preferred embodiment of the present invention has been described in detail above, the present invention is not limited to the specific embodiment.

As described above, according to the processing of each of the above-described embodiments, it is possible to reduce the possibility that the performance is deteriorated due to the paper type detection when printing is restarted from the state where the paper runs out during printing.

103 Printer 401 CPU
402 FlashROM
417 Display

Claims (11)

Paper storage and
A transport means for transporting paper from the paper storage unit and
A detecting means for detecting the type of paper being conveyed by the conveying means, and
A registration means for registering the type of paper detected by the detection means as the type of paper stored in the paper storage unit, and
A printing apparatus having a printing means for printing based on the type of paper registered by the registration means.
A detection means for detecting a change in the open / closed state of the paper storage unit, and
Based on the detection of the change in the open / closed state of the paper storage unit by the detection means, the paper type to be conveyed next is registered as the type of paper stored in the paper storage unit. It has a control means to be registered by means,
When the paper storage unit for which the change in the open / closed state is detected by the detection means is the paper storage unit used in the printing job interrupted without paper, the control means uses the paper to be conveyed next. A printing apparatus characterized in that the type of paper is not registered as the type of paper stored in the paper storage unit by the registration means. When the paper type to be conveyed next is not registered by the registration means as the type of paper stored in the paper storage unit, the detection means detects the type of paper. Also, the registration means does not register the type of paper detected by the detection means as the type of paper stored in the paper storage unit.
The printing apparatus according to claim 1, wherein the printing means prints based on a paper type registered before the detection means detects the paper type. Based on the opening of the paper storage unit, the control means registers the paper type as the type of paper stored in the paper storage unit by the registration means using the paper to be conveyed next. The printing apparatus according to claim 1, wherein the printing apparatus is in a state of being used. When the paper storage unit for which the change in the open / closed state is detected by the detection means is the paper storage unit used in the printing job interrupted without paper, the type of the paper to be conveyed is used next. 1 to any one of claims 1 to 3, further comprising a setting means for setting whether or not to be registered by the registration means as the type of paper stored in the paper storage unit. The printing device described. It has a plurality of paper storage units including a first paper storage unit and a second paper storage unit.
When the paper storage unit for which the change in the open / closed state is detected by the detection means is the paper storage unit used in the printing job interrupted without paper, and the paper storage unit is the first paper storage unit. Then, using the paper to be conveyed, the type of the paper is registered as the type of the paper stored in the paper storage unit by the registration means.
When the paper storage unit for which the change in the open / closed state is detected by the detection means is the paper storage unit used in the printing job interrupted without paper, and the paper storage unit is the second paper storage unit. One of claims 1 to 4, wherein the type of the paper is not registered as the type of the paper stored in the paper storage unit by the registration means using the paper to be conveyed next. The printing apparatus according to item 1. The first paper storage unit is a paper storage unit whose performance does not deteriorate due to the detection of the paper type by the detection means.
The printing apparatus according to claim 5, wherein the second paper storage unit is a paper storage unit whose performance is deteriorated by detecting the type of paper by the detection means. Further having a receiving means for receiving the print job from an external device via a network,
The printing apparatus according to any one of claims 1 to 6, wherein the printing means prints based on a print job received by the receiving means. The printing apparatus according to any one of claims 1 to 7, wherein the type of the paper is different from the size of the paper. The printing apparatus according to any one of claims 1 to 8, wherein the type of the paper is the thickness of the paper. Paper storage and
A transport means for transporting paper from the paper storage unit and
A detecting means for detecting the type of paper being conveyed by the conveying means, and
A registration means for registering the type of paper detected by the detection means as the type of paper stored in the paper storage unit, and
A method for controlling a printing apparatus having a printing means for printing based on the type of paper registered by the registration means.
Based on the detection of the change in the open / closed state of the paper storage unit, the type of the paper is registered as the type of paper stored in the paper storage unit by the registration means using the paper to be conveyed next. Put it in a state,
When the paper storage unit that has detected the change in the open / closed state is the paper storage unit used in the printing job that is interrupted without paper, the paper type to be conveyed is used to store the paper type. A method for controlling a printing apparatus, characterized in that the type of paper stored in the unit is not registered by the registration means. A program for causing a computer to execute the control method of the printing apparatus according to claim 10.

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