JPH08102817A - Facsimile equipment - Google Patents

Abstract

PURPOSE: To prevent a cut paper or the like from being stained with toner when a cut paper is not normally transmitted and to prevent that the communication of multipage is interrupted when cut paper is not transmitted and when a retransmission operation is executed. CONSTITUTION: When data reception from an external facsimile equipment is started, the parallel processing of the transportation operation of cut paper P and a picture formation is started. It is judged whether a sensor before resist 7 is turned on whthin prescribed time or not. When the sensor before resist 7 is not turned on, a feed counter manages the transportation operation so that it is repeated for the prescribed frequencies until cut paper P is detected by the sensor before resist 7. When paper is not fed even when it is transported for the prescribed frequencies cut paper P is judged to be not transmitted and a processing is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine which uses cut sheets as recording sheets.

[0002]

2. Description of the Related Art In recent years, electrophotographic facsimile machines using cut sheets as recording sheets have become widespread.
In such a facsimile device, for example, by receiving a signal from a transmitting facsimile device, a cut sheet loaded as a recording sheet in a sheet feeding unit such as a sheet feeding tray or a sheet feeding cassette is started to be conveyed, and A toner image is formed on an electrophotographic photosensitive member such as a photosensitive belt from image information in the received signal. The cut sheet conveyed from the sheet feeding unit is detected by the pre-registration sensor and then starts to be conveyed in synchronization with the toner image formed on the electrophotographic photosensitive member by the pair of registration rollers. The transfer device facing the electrophotographic photosensitive member electrostatically transfers the toner image on the electrophotographic photosensitive member onto the cut sheet conveyed to the transfer position. After the transfer is completed, the cut sheet is conveyed to the fixing device, the toner image is heated and fixed, and the sheet is ejected from the apparatus.

In the above-mentioned facsimile machine, which is premised on receiving a signal unattended and recording on a cut sheet, if the cut sheet loaded in the paper feed unit is unfed for some reason, it is received. An error occurs and reception and recording are interrupted. As an apparatus capable of increasing the reliability in such a case, for example, in the specification of Japanese Patent Application No. 5-208623 filed by the applicant of the present application, a facsimile using cut paper as a received image recording paper is described. The apparatus is provided with a control unit that causes the sheet to be re-conveyed when the recording sheet is conveyed from the sheet feeding section to the recording section during recording based on the received data. A facsimile machine is described.

[0004]

As a method of controlling image formation in the facsimile apparatus of Japanese Patent Application No. 5-208623, after confirming that the cut sheet is normally conveyed from the sheet feeding section by a pre-registration sensor or the like, There are two possible methods: a method of starting image formation on the electrophotographic photosensitive member and a method of forming an image on the electrophotographic photosensitive member in parallel with the conveying operation for conveying the cut sheet from the paper feeding unit.

According to the former control method, the number of printed sheets per unit time (hereinafter abbreviated as CPM (Copy Per Min)) is reduced, but even if the cut sheet is not fed, the cut sheet becomes dirty. It is possible to prevent adverse effects due to the untransferred toner. Further, according to the latter control method, it is possible to prevent the CPM from decreasing, but even if a toner image is formed on the electrophotographic photosensitive member, the cut sheet is not conveyed to the transfer position and the formed toner image is formed. May not be transferred to the cut paper.

Since the CPM decreases and the call time becomes longer and the communication cost increases, it is desirable to adopt the latter control method when considering the communication cost.
However, in the facsimile apparatus using the latter control method, the toner image reaches the position facing the transfer device without the cut sheet at the transfer position. For this reason, when a contact type transfer device is used as the transfer device, toner adheres to the transfer roller, causing problems such as dirt on the front end and the back surface of the cut sheet.

In addition, when multi-page transmission is performed between G3 facsimile machines, when the transmission side apparatus completes the transmission of one page of image information, the MPS (Multi
-Page-Signal) signal or EOM (End Of Message) signal is transmitted, and the device on the reception side returns an MCF (Message Confirmation) signal when reception of image information is completed. However, when the receiving-side facsimile apparatus carries out the carrying operation a plurality of times, it is conceivable that the recording of the previous page is not completed even if the reception of the next page is completed. In this case, if the memory of the facsimile device does not have a capacity capable of storing image information of a plurality of pages, a communication error may occur and recording may be interrupted in the middle of multi-page.

Furthermore, even if the G3 facsimile apparatus transmits the MPS signal a preset number of times set in advance by the system, if no MCF signal is returned from the receiving side, the output of the signal is stopped as a communication error. However, even in this case, recording may be interrupted in the middle of multi-page.

An object of the present invention is to prevent untransferred toner from contaminating the cut sheet even when the cut sheet is not fed, and when the cut sheet is not fed and the re-conveying operation is performed. SUMMARY OF THE INVENTION It is an object of the present invention to provide a facsimile apparatus having a high CPM in which multi-page recording and transmission are not interrupted.

[0010]

In order to solve the above-mentioned problems, a facsimile apparatus according to claim 1 of the present invention comprises a recording means for forming a toner image on an electrophotographic photosensitive member based on received data, and a paper feed. Facsimile device including a sheet feeding unit for feeding a cut sheet loaded as a recording sheet to the sheet and a transfer unit for transferring the toner image of the electrophotographic photosensitive member to the cut sheet conveyed to the transfer position by the sheet feeding unit. In the apparatus, the transfer unit is configured by a transfer unit using a non-contact type wire discharge system, and the sheet feeding unit performs a conveying operation during image formation of the recording unit and a cut sheet is not fed. In addition, it is characterized in that a control means for causing the sheet feeding means to carry out the re-conveyance operation of the cut sheet is provided.

According to a second aspect of the present invention, a facsimile machine has a recording means for forming a toner image on an electrophotographic photosensitive member based on received data, and a paper feed for carrying cut paper loaded as a recording paper in a paper feed section. Means, a transfer means for transferring the toner image of the electrophotographic photosensitive member to the cut paper conveyed to the transfer position by the paper feed means, and a pre-registration sensor for detecting the cut paper carried by the paper feed means In the facsimile machine, the transfer means is composed of a transfer device using a contact type roller transfer method, and the paper feeding means performs a conveying operation during image formation of the recording means, and the cut sheet is not fed. In this case, the sheet feeding means performs the re-conveyance operation of the cut sheet, and after the conveyance operation by the sheet feeding section is started, the pre-registration sensor transfers the cut sheet to the transfer device. The time characterized by comprising a control means for applying a voltage of reverse characteristic.

According to a third aspect of the present invention, the facsimile apparatus has a recording means for forming a toner image on the electrophotographic photosensitive member based on the received data, and a paper feeding means for conveying the cut paper loaded as the recording paper in the storage portion. In a facsimile apparatus including a pre-registration sensor that detects a cut sheet conveyed by the sheet feeding unit, the sheet feeding unit performs a conveying operation during image formation by the recording unit, and the cut sheet is not fed. In this case, when the cut sheet is re-conveyed by the sheet feeding means and the image information for one page is received during the communication by the binary code signal system (CCITT recommendation T.30), MPS (M
If the cut sheet is detected by the pre-registration sensor after confirming the reception of the ulti-page-signal) signal or the EOM (End Of Message) signal, the transmitting side device receives the MCF (Mes
sage Confirmation) signal is provided as a control means.

According to a fourth aspect of the present invention, the facsimile machine has a recording means for forming a toner image on the electrophotographic photosensitive member based on the received data, and a paper feeding means for conveying the cut paper loaded as the recording paper in the storage portion. In a facsimile apparatus including a pre-registration sensor that detects a cut sheet conveyed by the sheet feeding unit, the sheet feeding unit performs a conveying operation during image formation by the recording unit, and the cut sheet is not fed. In this case, the cut sheet re-conveyance operation is performed by the paper feeding unit, and the image information for one page is received during communication by ECM (Error-Correction-Mode), and MPS (Multi-P
After confirming the reception of the age-Signal) signal or the EOM (End Of Message) signal, until the cut sheet is detected by the pre-registration sensor, the RR (Rec
RNR (Receive-Not-Ready) signal is sent back to the eive-Ready signal, and if the cut sheet is detected by the pre-registration sensor, M is sent to the RR (Receive-Ready) signal.
It is characterized by having a control means for returning a CF (Message Confirmation) signal.

[0014]

According to the facsimile apparatus of the first aspect of the present invention, the transfer means is constituted by a transfer device using a non-contact type wire discharge system, and the control means prevents the cut sheet from being formed during image formation by the recording means. By performing the re-conveyance operation of the cut sheet when it is fed, the state where the cut sheet is not conveyed from the paper feed section is reduced, and even when the cut sheet is not conveyed from the paper feed section, The remaining untransferred toner is prevented from transferring to the transfer device.

According to the second aspect of the present invention, the transfer means is composed of a transfer device using a contact type roller transfer system, and the control means does not feed the cut sheet during image formation by the recording means. In this case, if the pre-registration sensor detects the cut sheet after the conveyance operation is started and the cut sheet is re-conveyed, the transfer device is applied with a voltage of the reverse characteristic to that at the time of transfer. The state that the cut sheet is not conveyed from the printer is reduced, and ozone is generated during transfer, and the transfer position of the toner image to the cut sheet is shifted compared to when a non-contact wire discharge type transfer unit is used. The occurrence of jam and the occurrence of jam are respectively suppressed, and even when the cut sheet is not conveyed from the paper feeding unit, the transfer of the untransferred toner remaining on the electrophotographic photosensitive member to the transfer device is suppressed.

According to another aspect of the present invention, the control means causes the cut sheet to be re-conveyed when the cut sheet is not fed during image formation, and the binary code signal system (CCITT). During communication according to Recommendation T.30), image information for one page is received and MPS (Multi-Page-
If the cut sheet is detected by the pre-registration sensor after confirming the reception of the Signal) signal or EOM (End Of Message) signal, MCF (Message Confirmat
Ion) signal is sent back to reduce the state that the cut sheet is not conveyed from the paper feed section, and if the cut sheet is not conveyed normally, the image information of the next page will not be sent from the transmission side. Communication errors will not occur due to insufficient memory capacity.

According to a fourth aspect of the present invention, the control means causes the paper feed means to feed the cut paper when the paper feed means performs a conveying operation during image formation and the cut paper is not fed. Re-transport operation is performed, and ECM (Err
Image information for one page is received during communication in or-Correction-Mode), and MPS (Multi-Page-Signal) signal or E
After confirming the reception of the OM (End Of Message) signal, until the cut sheet is detected by the pre-registration sensor, R is received for the RR (Receive-Ready) signal received from the transmitting side device.
NR (Receive-Not-Ready) signal is returned, and if the recording paper is detected by the pre-registration sensor, RR (Receive-R
By sending an MCF (Message Confirmation) signal in response to the eady) signal, the state in which the cut sheet is not conveyed from the paper feed unit is reduced, and if the cut sheet is not conveyed normally, the image on the next page is sent from the sending side. Since the information is not sent, the communication error does not occur due to the lack of the memory capacity, and the communication error does not occur due to the count-up of the MPS signal or the EOM signal during the reconveying operation.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of a facsimile apparatus of the present invention. Reference numeral 1 is a paper feed tray in which cut paper P cut into a predetermined size is loaded as recording paper, 2 is a half-moon-shaped paper feed roller, and 3 is cut paper P on which cut paper P is placed by an elastic member (not shown). Bottom plate that urges the
Reference numeral 4 denotes a separation claw that locks the corner portion of the cut sheet P urged upward by the bottom plate 3, 5 is a conveyance roller pair, 6 is a registration roller pair, 7 is a pre-registration sensor, and 8 is stretched by a roller 9. It is a photoconductor belt. 10 is a charger, 11 is a developing device, 12 is a transfer charger which is a transfer device using a non-contact type wire discharge method, 13 is a fixing device composed of a heating roller and a pressure roller, 14 is a cleaning device,
15 is a static elimination lamp.

When the recording paper is conveyed, a paper feed motor and a paper feed clutch (not shown) are turned on to rotate the conveyance roller pair 5 and the registration roller pair 6. After that, paper feed roller 2
The driving force is transmitted to the sheet feeding roller 2 via the sheet feeding clutch to rotate the sheet feeding roller 2. When the paper feed roller 2 rotates once, the uppermost cut paper P in the paper feed tray 1 is fed to the conveyance roller pair 5 side. As is known, at the beginning, the tip of the cut sheet P is caught on the separating claw 4, but as the extrusion amount of the cut sheet P increases, the uppermost cut sheet P is separated by the action of the waist of the sheet itself. Four
And is conveyed by the conveying roller pair 5 in the direction of the registration roller pair 6.

The leading edge of the cut sheet P turns on the pre-registration sensor 7, the pair of registration rollers 6 conveys the cut sheet P to a standby position before the photosensitive belt 8, and stops.

During image formation, the photoconductor belt 8 which moves in the direction of arrow A, neutralizes the residual electric charge by the static elimination lamp 15, and is uniformly charged by the charger 10 from the recording / scanning unit described later. An electrostatic latent image is formed by scanning with the laser light L. The developing device 11 develops the electrostatic latent image into a toner image by transferring the toner to one of an exposed region and a non-exposed region of the electrostatic latent image.

Then, the registration roller pair 6 starts the conveyance of the cut sheet P which has been stopped in synchronism with the toner image on the photosensitive belt 8, and the cut sheet P is transferred between the transfer charger 12 and the photosensitive belt 8. The toner image on the photosensitive belt 8 is electrostatically transferred by the transfer charger 12 after being conveyed to the transfer position. After the transfer is completed, the cut paper P is fixed to the fixing device 13
And the toner image is fixed.

FIG. 2 is a block diagram showing the configuration of the control unit in the facsimile apparatus of the first embodiment. The image reading means includes a reading scanning unit 20, a reading processing unit 21, a line memory 22,
It is composed of the line memory control unit 23. The image recording means includes a recording scanning unit 24, a recording processing unit 25, a line memory.
22, a line memory controller 23, and the developing device 11 shown in FIG. It should be noted that this embodiment shows an example of a full-duplex configuration.

The image information read by the reading scanning unit 20 is temporarily stored in the line memory 22 via the reading processing unit 21. According to the data compression mode of the information compression / decompression unit 26, the redundancy is removed while the image information is read from the line memory 22 and stored in the RAM 28 through the data bus 27.
The RAM 28 is used as a transmission buffer, and image information is sent to the modem 30 via the communication control unit 29. The signal modulated by the modem 30 is sent out to the line through the network control unit 31.

On the contrary, the image information signal received from the line is modulated by the modem 30 through the network control unit 31, and the communication control unit 29.
Is output to the data bus 27 and stored in the RAM 28. The RAM 28 is used as a reception buffer, and image information is sequentially input to the information compression / decompression unit 26 via the data bus 27 for data decompression. Then, the image information is called from the line memory 22 again, passes through the recording processing unit 25, and is input to the recording scanning unit 24. The recording / scanning unit 24 emits a laser beam L corresponding to image information to form an electrostatic latent image on the photosensitive belt 8.

The image information is simply passed through the network control unit 31 and the communication control unit 29, but the communication control information is read and understood in the communication control unit 29 to execute transmission control, error control and the like. Processing is performed, and when journal information is required, it is stored in the RAM 28 having a non-volatile function.

Further, a call signal for network control is provided by the network control unit.
Controlled by 31. Further, the image information that does not require information compression / decompression is taken out from the read processing unit 21 and the line memory 22 directly to the RAM 28 or the like via the data bus 27.
Image processing and image communication are possible. Further, it is also possible to directly input image-processed information or image-synthesized information, superimpose it on image information, store it in the line memory 22, and record / reproduce it. The line memory 22 can be used separately from the information compression / decompression unit 26, and it is also possible to use the line memory 22 by decompressing the compressed information irrespective of read scanning and recording scanning and outputting it via the line memory 22. An MPU (micro processing unit) 32 performs overall system control, information flow management, communication control, and network control.

The main processing of system control is the panel unit 33.
The control relating to the man-machine interface 34 by the above, and the control relating to the mechanical configuration of the image reading section and the image recording section by the mechanism control section 36 via the interface 35. The number of input / output terminals and the control method of the panel unit 33 greatly differ depending on the type and type of panel switch and panel display. Further, the mechanism control unit 36 changes the type and quantity of the driver and the sensor depending on the method and mechanical configuration of the image reading unit and the image recording unit, and affects the control complexity. In addition, in the figure
37 is a DMA (Direct Memory Access) controller.

FIG. 3 is a flow chart relating to the carrying operation and the image forming processing in the first embodiment. When data reception from an external facsimile machine is started, each part is initialized (S1-1), and the feeding is performed. Turn on the paper motor (S1-
2) The paper feed roller 2 is rotated once (S1-3). Here, the program of the subroutine starts the parallel processing of image formation (S1-10) and starts the timer counter.
(S1-4), it is determined whether or not the pre-registration sensor 7 is turned on within a fixed time (S1-5). If the pre-registration sensor 7 is not turned on, the conveyance operation is performed on the cut sheet P.
Is controlled by the feed counter so as to be performed a fixed number of times until is detected by the pre-registration sensor 7 (S1-6,
S1-7). If the paper is not fed even after being conveyed a certain number of times (S1
-7 YES), the non-feed of the cut sheet P is judged and the processing is stopped (S1-8). In addition, when the pre-registration sensor 7 is turned on by the conveying operation within a certain number of times, the transfer charger is
A positive charge is applied to 12 (S1-11), and the toner image is transferred to the cut paper P that has been synchronously conveyed by the registration roller pair 6.

When it is judged that the cut sheet P has not been fed and the processing is stopped, the MPU 32 processes the toner image formed on the photoconductor belt 8. The belt 8 is moved in the direction of arrow A. At this time, the cleaning device 14 peels off the toner on the photosensitive belt 8 and collects it inside. Further, since the transfer charger 12 uses the non-contact type wire discharge method, even if the cut sheet P is not fed, the toner remaining on the photosensitive belt 8 does not adhere.

According to the facsimile apparatus of the first embodiment,
Even if a feed failure occurs when the cut sheet P is first separated / fed from the sheet feed tray 1, the feed failure is detected and the re-conveying operation is performed to perform the sheet feed operation several times. It is possible to suppress the occurrence of non-feeding, and cut paper P
It is possible to suppress the occurrence of communication stop due to the failure to send further,
When the cut paper P is not fed, the untransferred toner remaining on the photoconductor belt 8 does not transfer to the transfer charger 12, so that the untransferred toner is adversely attached to the cut paper P. Absent. Therefore, it is possible to prevent the CPM from decreasing due to the carrying operation and the image forming process being performed in parallel.

FIG. 4 is a block diagram showing a second embodiment of the facsimile apparatus of the present invention. Members corresponding to the members described with reference to FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. A transfer roller 40 is a transfer device using a contact type roller transfer system.

When the recording paper is conveyed, a paper feed motor and a paper feed clutch (not shown) are turned on to rotate the conveyance roller pair 5 and the registration roller pair 6. After that, paper feed roller 2
The driving force is transmitted to the sheet feeding roller 2 via the sheet feeding clutch to rotate the sheet feeding roller 2. When the paper feed roller 2 rotates once, the uppermost cut paper P in the paper feed tray 1 is fed to the conveyance roller pair 5 side. As is known, at the beginning, the tip of the cut sheet P is caught on the separating claw 4, but as the extrusion amount of the cut sheet P increases, the uppermost cut sheet P is separated by the action of the waist of the sheet itself. Four
And is conveyed by the conveying roller pair 5 in the direction of the registration roller pair 6.

The leading edge of the cut sheet P turns on the pre-registration sensor 7, the pair of registration rollers 6 conveys the cut sheet P to a standby position before the photosensitive belt 8, and stops.

During image formation, the photoconductor belt 8 moved in the direction of arrow A, neutralized by the static elimination lamp 15 and further uniformly charged by the charger 10, is the laser beam from the recording scanning unit. By scanning with L, an electrostatic latent image is formed. The developing device 11 is
The electrostatic latent image is developed into a toner image by transferring toner to one of the exposed area and the non-exposed area of the electrostatic latent image.

Then, the registration roller pair 6 starts conveying the cut sheet P which has been stopped in synchronization with the toner image on the photosensitive belt 8, and the cut sheet P is transferred by the transfer roller 40 and the photosensitive belt 8. The toner image on the photoconductor belt 8 is electrostatically transferred by the transfer roller 40 while being conveyed to the held transfer position. After the transfer is completed, the cut sheet P is conveyed to the fixing device 13 and the toner image is fixed.

The facsimile apparatus of the second embodiment is provided with the same control unit as that of the first embodiment described with reference to FIG. 2 as a hardware configuration, and the first embodiment is stored in the ROM of the MPU 32 for controlling the transfer device. A control program different from is stored.

FIG. 5 is a flow chart relating to the carrying operation and the image forming processing in the second embodiment. When the data reception from the external facsimile machine is started, the respective parts are initialized (S2-1), and the feeding is performed. While the paper motor is turned on, a reverse charge having the reverse characteristic to that at the time of transfer is applied to the transfer roller 40 (S2-2), and the paper feed roller 2 is rotated once (S2-.
3). Here, the program of the subroutine starts the parallel processing of image formation (S2-10), starts the timer counter (S2-4), and judges whether the pre-registration sensor 7 is turned on within a certain time. Yes (S2-5). If the pre-registration sensor 7 is not turned on, the feed counter is controlled so that the feeding operation is performed a certain number of times until the cut sheet P is detected by the pre-registration sensor 7 (S2-6, S2-). 7). When the paper is not fed even after being conveyed a certain number of times (YES in S2-7), the non-feed of the cut paper P is determined and the processing is stopped (S2-8). Further, when the pre-registration sensor 7 is turned on by the conveying operation within a certain number of times, the voltage applied to the transfer roller 40 is changed to positive charge (S2-11), and the synchronous conveyance started by the registration roller pair 6 is cut. The toner image is transferred onto the paper P.

When it is determined that the cut paper P has not been fed and the processing is stopped, the MPU 32 processes the toner image formed on the photoconductor belt 8, and therefore, the MPU 32 applies the reverse charge to the transfer roller 40, The body belt 8 is moved in the direction of arrow A. At this time, the cleaning device 14 peels off the toner on the photosensitive belt 8 and collects it inside. Also, the transfer roller
In the case of 40, since the reverse charge is applied, the electrostatic repulsive force acts on the toner remaining on the photosensitive belt 8 even when the cut sheet P is not fed, so that the toner adheres. Is suppressed.

According to the facsimile apparatus of the second embodiment,
Even if a feed failure occurs when the cut sheet P is first separated / fed from the sheet feed tray 1, the feed failure is detected and the re-conveying operation is performed to perform the sheet feed operation several times. It is possible to suppress the occurrence of non-feeding, and cut paper P
It is possible to suppress the occurrence of communication stop due to the failure to send. further,
When the cut paper P is not fed, transfer of the untransferred toner remaining on the photosensitive belt 8 to the transfer roller 40 is suppressed, so that the untransferred toner adheres to the cut paper P. There is no adverse effect. Therefore, it is possible to prevent the CPM from decreasing due to the carrying operation and the image forming process being performed in parallel. Further, as compared with the case where the transfer charger 12 is used as in the first embodiment, it is possible to suppress the generation of ozone during transfer, the shift of the transfer position of the toner image on the cut sheet, and the occurrence of jam, respectively.

Next, the communication control with the external facsimile machine in the facsimile machines of the first and second embodiments will be described. Here, the MPU 32 performs common control in the facsimile machines of the first and second embodiments, and information communication is carried out by the binary code signal system (CCITT recommendation T.30) between the G3 facsimile machines. It is supposed to be done.

6 and 7 are timing charts of communication control when the facsimile apparatus of the present invention or an external facsimile apparatus does not have the ECM function. In the following description, T _X indicates an external facsimile machine on the transmitting side, and R _X indicates a facsimile machine of the present invention on the receiving side.

FIG. 6 is a timing chart of input signals and output signals when the cut sheet P is normally conveyed to the registration roller pair 6 by one conveying operation. In the case of multi-page transmission of N pages, the facsimile machine T _X
When the transmission of the image information of the N-1th page is completed, M
A PS (Multi-Page-Signal) signal is transmitted to the facsimile device R _X.

In the facsimile apparatus R _X , when the cut sheet P is normally conveyed in the first conveying operation, N-1
The pre-registration sensor 7 is turned on while the image information of the page is being input. Therefore, in the case shown in FIG. 6, when the facsimile device R _X has completed receiving the image information and the MPS signal, the facsimile device R _X responds to the MPS signal by MCF (Message Confirmation).
The signal is returned to the facsimile device T _X. After confirming that the image information is normally received by the MCF signal, the facsimile apparatus T _X performs training (RETRAIN) with the modem 30 as necessary, transmits the image information of the Nth page, and then EOP to notify that it is the last page
(End Of Procedure) signal is transmitted. The facsimile device R _X returns the MCF signal in response to the EOP signal, and the MC
Upon receiving the F signal, the facsimile machine T _X receives the DCN (Discon
nect) After sending the signal, switch the line from facsimile to telephone.

FIG. 7 shows an input when the cut sheet P is not normally conveyed to the registration roller pair 6 by one conveying operation at the time of receiving the image information of the (N-1) th page and the conveying operation is repeated a plurality of times. It is a timing chart of a signal and an output signal. In the case of multi-page transmission of N pages, the facsimile apparatus T _X subsequently transmits an MPS (Multi-Page-Signal) signal to the facsimile apparatus R _X when the transmission of the image information of the N−1th page is completed. The facsimile apparatus R _X does not return the MCF signal when the pre-registration sensor 7 is not turned on. When the MCF signal is not returned, the facsimile device T _X repeatedly transmits the MPS signal at regular time intervals. If the pre-registration sensor 7 is turned on, the facsimile apparatus R _X returns an MCF signal to the facsimile apparatus T _X in response to the MPS signal. After confirming that the image information is normally received by the MCF signal, the facsimile apparatus T _X performs training (RETRAIN) with the modem 30 as necessary, and transmits the image information of the Nth page,
Then, EOP (End
Of Procedure) signal is transmitted. At this time, in the facsimile apparatus R _X , if the cut sheet P is normally conveyed in the first conveying operation, the communication is completed by the same control as in the case of FIG.

According to the above-mentioned communication control in the facsimile apparatus of the present invention, in the facsimile apparatus R _X whose memory does not have a capacity for storing the image information of a plurality of pages,
Even if the cut sheet P is not normally conveyed in the first conveying operation and the conveying operation is repeated a plurality of times, if the cut sheet P is not normally conveyed, the facsimile apparatus T _X outputs the image information of the next page and thereafter. Since no data is sent, it is possible to prevent a communication error from occurring due to insufficient memory capacity, and it is possible to reduce the frequency with which some data is lost due to a communication error.

FIG. 8 is a timing chart of communication control when the facsimile apparatus according to the present invention and the external facsimile apparatus have the ECM function. 7 is a timing chart of an input signal and an output signal when the sheet is not normally conveyed to the registration roller pair 6 by a single conveying operation and the conveying operation is repeated a plurality of times.

In the case of multi-page transmission of N pages, when the transmission of the image information of the (N-1) th page is completed, the facsimile apparatus T _X then continues to the PPS (Patial Page Signal) signal and MPS (Multi-Page-Signal). Send the signal to the fax machine R _X. The facsimile apparatus R _X does not return the MCF signal when the pre-registration sensor 7 is not turned on. If there is no reply of the MCF signal, the facsimile apparatus T _X will perform ECM (Error-Correction-Mo) at regular time intervals.
An RR (Receive-Ready) signal, which is a peculiar signal for de), is repeatedly transmitted. If the pre-registration sensor 7 is not turned on, the facsimile device R _X responds to E with respect to the RR signal.
RNR (Receive-Not-Ready), which is a unique signal during CM
When the pre-registration sensor 7 is turned on by the cut sheet P, the MCF signal is returned to the facsimile apparatus T _X in response to the RR signal. After confirming that the image information is normally received by the MCF signal, the facsimile apparatus T _X performs training (RETRAIN) with the modem 30 as necessary, transmits the image information of the Nth page, and then EOP to notify that it is the last page
(End Of Procedure) signal is transmitted. At this time, in the facsimile apparatus R _X , if the cut sheet P is normally conveyed in the first conveying operation, the communication is completed by the control similar to the case of FIG.

According to the communication control at the time of ECM in the facsimile apparatus of the present invention, in the facsimile apparatus R _X whose memory does not have the capacity to store the image information of a plurality of pages, the cut sheet P is fed in the first conveying operation. If the cut sheet P is not conveyed normally even if the sheet is not conveyed normally and the conveying operation is repeated a plurality of times, the image information of the next page and subsequent pages will not be sent from the facsimile apparatus T _X. It is possible to prevent a communication error from occurring due to lack of memory capacity, reduce the frequency of missing a part of data due to a communication error, and further cause a communication error due to the count-up of the MPS signal or EOM signal during the reconveying operation. Will disappear.

[0050]

As described above, according to the facsimile apparatus of the first aspect, the state in which the cut sheet is not conveyed from the paper feed unit is reduced, and even when the cut sheet is not conveyed from the paper feed unit, the electronic By preventing the untransferred toner remaining on the photoconductor from transferring to the transfer device, it is possible to prevent interruption of multi-page communication in the middle of the transfer, and even if a cut sheet is not fed, Since it is possible to prevent the untransferred toner of the photographic photosensitive member from contaminating the cut sheet or the like, it is possible to perform the parallel processing of the carrying operation and the image forming operation, and it is possible to prevent the CPM from decreasing.

According to the second aspect of the present invention, the state in which the cut sheet is not conveyed from the paper feeding section is reduced, and in comparison with the case where the non-contact type wire discharge system is used as the transfer device. As a result, the generation of ozone during transfer, the shift of the transfer position of the toner image on the cut paper, and the occurrence of jams are suppressed, respectively, and even when the cut paper is not conveyed from the paper feed unit, it remains By suppressing the transfer of the toner in the transfer device to the transfer device, it is possible to suppress the interruption of the multi-page communication in the middle, and even when the cut paper is not fed, the untransferred toner on the electrophotographic photosensitive member remains. Since it is possible to prevent the cut paper and the like from being soiled, it is possible to perform the parallel processing of the carrying operation and the image forming operation, and it is possible to prevent the CPM from decreasing, and further, the environment is deteriorated by ozone. The deterioration of image quality can be prevented due to the deviation of the preliminary transfer position.

According to the third aspect of the present invention, the state in which the cut sheet is not conveyed from the paper feeding unit is reduced, and if the cut sheet is not conveyed normally, the image information of the next page is sent from the transmitting side. Is not sent, a communication error does not occur due to insufficient memory capacity, it is possible to suppress interruption of multi-page communication in the middle, and the memory can store image information of multiple pages. Even if the cut sheet is not fed normally in the first feeding operation and the feeding operation is repeated multiple times with a fax machine that does not have the, if the cut sheet is not fed normally, Since the subsequent image information is not sent, it is possible to prevent a communication error from occurring due to lack of memory capacity, and to save the data due to the communication error. There can reduce the frequency to be missing.

According to the fourth aspect of the present invention, the state in which the cut sheet is not conveyed from the paper feed unit is reduced, and when the cut sheet is not conveyed normally, the image information of the next page is sent from the transmission side. Is not sent, a communication error will not occur due to insufficient memory capacity, and a communication error will not occur due to the count-up of the MPS signal or EOM signal during the re-conveying operation. This is a facsimile machine that can prevent interruption of communication in the middle and the memory does not have the capacity to store the image information of multiple pages. Even if you repeat the above, if the cut sheet is not conveyed normally, the image information on the next page and after will be output from the fax machine. Since not come is, it is possible to prevent the communication error by the capacity shortage of the memory occurs,
The frequency with which part of the data is lost due to a communication error can be reduced, and a communication error will not occur due to the count-up of the MPS signal or EOM signal during the reconveying operation.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of a facsimile apparatus of the present invention.

FIG. 2 is a block diagram showing a configuration of a control unit in the facsimile apparatus of the first embodiment.

FIG. 3 is a flowchart relating to a carrying operation and an image forming process in the first embodiment.

FIG. 4 is a configuration diagram showing a second embodiment of the facsimile apparatus of the present invention.

FIG. 5 is a flowchart relating to a carrying operation and an image forming process in the second embodiment.

FIG. 6 is a timing chart of communication control when the facsimile apparatus of the present invention or an external facsimile apparatus does not have the ECM function.

FIG. 7 is a timing chart of communication control when the facsimile apparatus of the present invention or an external facsimile apparatus does not have the ECM function.

FIG. 8 is a timing chart of communication control when the facsimile apparatus of the present invention and an external facsimile apparatus have an ECM function.

[Explanation of symbols]

1 ... Paper feed tray, 2 ... Paper feed roller, 6 ... Registration roller pair, 7 ... Pre-registration sensor, 8 ... Photoconductor belt,
11 ... Developing device, 12 ... Transfer charger, 24 ... Recording scanning unit, 32 ... MPU (micro processing unit), 40 ... Transfer roller.

Claims (4)

[Claims] 1. A recording unit for forming a toner image on an electrophotographic photosensitive member based on received data, a sheet feeding unit for conveying a cut sheet loaded as a recording sheet in a sheet feeding unit, and a transfer unit for transferring by the sheet feeding unit. In a facsimile apparatus including a transfer unit that transfers the toner image of the electrophotographic photosensitive member to a cut sheet conveyed to a position, the transfer unit is configured by a transfer device using a non-contact type wire discharge system, A control unit that causes the sheet feeding unit to re-convey the cut sheet when the sheet feeding unit performs the feeding operation and the cut sheet is not fed during the image formation of the recording unit. Facsimile machine. 2. A recording unit for forming a toner image on an electrophotographic photosensitive member based on received data, a sheet feeding unit for conveying a cut sheet loaded as a recording sheet in a sheet feeding unit, and a transfer unit for transferring by the sheet feeding unit. In a facsimile apparatus including a transfer unit that transfers the toner image of the electrophotographic photosensitive member to the cut sheet conveyed to the position and a pre-registration sensor that detects the cut sheet conveyed by the sheet feeding unit, the transfer unit is , A transfer device using a contact type roller transfer method,
When the sheet feeding unit performs the feeding operation during the image formation of the recording unit and the cut sheet is not fed, the sheet feeding unit causes the sheet to be re-conveyed and the feeding unit starts the feeding operation. After that, the facsimile apparatus is provided with a control means for applying a voltage having a characteristic reverse to that at the time of transfer to the transfer device until the pre-registration sensor detects a cut sheet. 3. A recording unit for forming a toner image on an electrophotographic photosensitive member based on received data, a sheet feeding unit for conveying a cut sheet loaded as a recording sheet in a storage section, and a sheet feeding unit for conveying the cut sheet. In a facsimile apparatus equipped with a pre-registration sensor for detecting cut sheets, if the cut sheets are not fed due to the feeding operation of the sheet feeding means during image formation by the recording means, the cut sheets are fed by the paper feeding means. Re-carrying operation is performed and the image information for one page is received at the time of communication by the binary code signal system (CCITT recommendation T.30), and MPS (Multi-Page-Signal) signal or EOM (End Of
A facsimile machine comprising a control means for returning an MCF (Message Confirmation) signal to the transmitting side device when a cut sheet is detected by the pre-registration sensor after confirming reception of a (Message) signal. 4. A recording unit for forming a toner image on an electrophotographic photosensitive member based on received data, a sheet feeding unit for feeding a cut sheet loaded as a recording sheet in a storage unit, and a sheet feeding unit for feeding the cut sheet. In a facsimile apparatus equipped with a pre-registration sensor for detecting cut sheets, if the cut sheets are not fed due to the feeding operation of the sheet feeding means during image formation by the recording means, the cut sheets are fed by the paper feeding means. Re-transport operation of ECM (Error-Correction-Mode)
Image information for one page is received during communication by
S (Multi-Page-Signal) signal or EOM (End Of Messag)
e) After confirming the reception of the signal, until the cut sheet is detected by the pre-registration sensor, the RNR (Receive-No) is received with respect to the RR (Receive-Ready) signal received from the transmitting side device.
t-Ready) signal is returned, and if a cut sheet is detected by the pre-registration sensor, a control means for returning an MCF (Message Confirmation) signal to the RR (Receive-Ready) signal is provided. Facsimile machine.