JPH04315364A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To send an original while the relation of the front and rear sides of an original and a reception printed matter is not lost when an event of retransmission takes place due to a cause of a communication fault or the like in the facrimile equipment able to sent/receive both sides of the original. CONSTITUTION:A picture data sent when a both side command section 1a commands both side communication is sent to a receiver side in the order of the front side and the rear side by a communication section 21. In this case, a count of a transmission page counter 24 is an odd number at the transmission of the front side picture data and a count of a transmittal confirmation page counter 25 is an even number. When a communication fault or the like takes place, a fault detection section 22 informs it to a both side communication control section 23. The both side communication cotrol section 23 references the count of the transmission page counter 24 and the transmittal confirmation page counter 25 to send the picture data from the front side again.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine, and more particularly to a facsimile machine having a function of instructing double-sided printing.

0002

2. Description of the Related Art Conventionally, facsimile machines have been proposed which are capable of continuously transmitting double-sided originals and are capable of printing on both sides of recording paper. The following patent publications disclose the facsimile machine.

[0003] Japanese Patent Laid-Open No. 2-78361 discloses a facsimile machine that is capable of continuously sending double-sided originals and also continuously printing out received images corresponding to both sides of the original. ing.

Furthermore, Japanese Patent Laid-Open No. 2-194769 discloses a facsimile machine that can save recording paper by printing on both sides of the recording paper based on instructions from the sender. An apparatus is disclosed.

[0005]

According to the facsimile apparatus of the prior art, when a double-sided original is sent from the sending side, the receiving side can create a double-sided printed matter in the same format as the double-sided original.

[0006] However, if some kind of communication failure occurs during communication, the above-mentioned conventional technology does not take any countermeasures, so when retransmitting from the page where the communication failure occurred,
There has been a problem in that the relationship between the front and back sides of the original and the received printed matter is disrupted.

In other words, when a communication failure occurs while transmitting image data for the back side of a document, if the image data for the back side is retransmitted, the paper on which the image data received before the communication failure was recorded has already been ejected on the receiving side. , image data received after a communication failure is printed on newly fed paper, so
It will be printed on the front side of the receipt paper. Subsequently, when the front side of the next page of the document is transmitted, it will be printed on the back side of the paper, and the relationship between the front and back sides of the document and the received printed matter will be disrupted.

It is an object of the present invention to eliminate the problems of the conventional devices described above, and to provide a facsimile machine in which the front-to-back relationship between the original and the received printed matter is not destroyed even if image data is retransmitted for some reason. It is about providing.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a facsimile machine having a double-sided instruction section for instructing double-sided printing, including a transmitted page counting means for counting the number of transmitted pages; A delivery confirmation page count means for counting delivery confirmation pages; a failure detection section for detecting a communication failure; and when a communication failure occurs, a transmission image It is characterized in that it is equipped with a retransmission means for retransmitting data from the surface.

0010

[Operation] According to the present invention, when transmission of one page of a document is started during double-sided communication, the transmission page counting means counts up by 1, and it is confirmed that the transmission of the one page has been normally transmitted. Then, the delivery confirmation page count means is incremented by one. In the event of a communication failure,
The retransmission means refers to the count values of the transmission page counting means and the delivery confirmation page counting means, and always retransmits the image data from the front side.

[0011] Therefore, it is possible to retransmit the original and the received printed material without destroying the front-to-back relationship, and it is possible to deliver the printed material in the same format as the original to the receiving side.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. FIG. 2 shows a schematic configuration diagram of a facsimile machine to which the present invention is applied.

In the figure, 1 is a panel, and on the panel 1 there are a numeric keypad, one-touch or speed dial buttons, G3 and G4 selection buttons, public line and ISDN line selection buttons, various function keys, a display section, etc. It is located. Reference numeral 2 denotes a control device, which controls the operation of each block (to be described later) according to data input from the panel 1, and provides display information to the display section.

3 is a scanner for reading original information to be transmitted;
4 is IIT (image input termina)
l), 5 is an image processing unit that encodes or decodes image data to be transmitted, and stores encoded transmitted/received image data, and 6 is an IOT (image output
erminal), 7 is a printer.

Further, 8 is a G3 communication control unit, 9 is a G4 communication control unit, 10 is a line selection device, and 11 is a line control unit (NC
U), 12 is an ISDN control unit. Furthermore, 13 is an external interface, and 14 is an auxiliary storage device.

FIG. 1 shows a functional block diagram of an embodiment of the present invention. In the figure, the functions performed by the blocks in FIG. 2 are represented by the reference numeral of the block with a appended "a". 21 is a communication unit, G3, G4 communication control units 8, 9,
Line selection device 10, NCU 11 and ISDN control unit 1
Contains 2. Reference numeral 22 denotes a failure detection unit that detects a communication failure, which is a function of the NCU 11 and the ISDN control unit 12.

Reference numeral 23 denotes a duplex communication control section which is a main part of the present invention, 24 a transmission page counter, and 25 a delivery confirmation page counter. You can have it.

Next, the operation of this embodiment will be explained. A double-sided printing instruction is sent from a double-sided instruction section 1a arranged on a panel 1, and a double-sided original or a single-sided original to be sent is read from an image input section 3a equipped with an automatic document reading device. The read data is stored in the image data storage section 5a.

Next, when an instruction to start transmission is given, the communication unit 21 performs communication using a communication protocol to check whether two-sided communication is possible. In the case of communication using a G3 facsimile device, the NSF (non-standard function) of the G3 protocol
First, the receiving side declares the two-sided communication function. When the sending side confirms that the receiving side has a two-sided communication function, it activates the two-sided communication using NSS (non-standard function setting).

On the other hand, in the case of communication using a G4 facsimile machine, communication regarding the presence or absence of the two-sided communication reception function is performed using the CSS (session start command) and RSS of the session layer.
P (Session Start Acknowledgment). In addition,
Since the data indicating the presence or absence of the two-sided communication reception function is defined after the CSS and RSSP provider codes (ie, manufacturer codes), it will not adversely affect other devices that do not have this function.

[0021] As described above, when the conditions for two-sided communication are established between the sending side and the receiving side, two-sided communication is started.

Next, the operation of the two-sided communication will be explained with reference to the flowchart of FIG. FIG. 3 is a flowchart showing the operation of the duplex communication control section 23. First, the transmission page counter 24 is set to 1, and the delivery confirmation page counter 25 is set to 0 (step S1). Next, one page of image data is taken out from the image data storage section 5a and transmitted to the receiving side via the communication section 21 (step S2). Next, it is determined whether or not the one page of image data has been transmitted normally without any communication failure (step S3), and if the communication has been carried out normally, the process proceeds to step S4. Delivery confirmation page counter 2
1 is added to 5.

[0023] In step S5, it is determined whether all pages of the transmission document have been transmitted, and if the determination is negative, 1 is added to the transmission page counter 24 (step S6). Next, the process returns to step S2, and the second page of image data is transmitted. When step S5 is affirmative, it means that all pages have been transmitted, and the two-sided communication operation ends.

FIG. 5 shows a sequence when double-sided communication is performed using the G3 facsimile machine and the communication progresses normally. The transmission page counter 24 and delivery confirmation page counter 25 are set to 1 and 0, respectively, at the start of front side transmission of the first page of the document. When the transmission of the front image data is successfully completed and an MCF (message confirmation) is received, the delivery confirmation page counter 25 is incremented by one. Next, when the back side of the first page of the document is transmitted, the transmission page counter 24 is incremented by 1 and becomes 2. The same procedure is followed thereafter.

Next, the operation when the above step S3 is affirmative, that is, when there is a communication failure and the receiving side cannot receive normal image data will be explained. When step S3 becomes affirmative and the process proceeds to step S7, it is determined whether or not the value of the transmission page counter is an odd number. If the value of the transmission page counter is an odd number (step S7 is affirmative), the process advances to step S8, and retransmission is started from the page where 1 is added to the delivery confirmation page counter. On the other hand, if the value of the transmission page counter is an even number (step S7 is negative), the process advances to step S9, and retransmission is started from the page indicated by the delivery confirmation page counter.

In step S10, it is determined whether the retransmission was performed without any communication failure. If there is no communication failure and the data can be transmitted normally, the process returns to step S4 to continue transmitting the image data. On the other hand, when a communication failure occurs again and normal transmission is not possible (step S10 is affirmative), the process advances to step S11, where it is determined whether or not to retransmit again.

If retransmission is to be performed, the process returns to step S7. If retransmission is not to be performed, the process proceeds to step S12, where the values of the transmission page counter and delivery confirmation page counter are treated as failure page data and sent to a communication management unit (not shown). Register. If the process proceeds to step S12, there is a high possibility that communication failure will occur again even if retransmission is repeated, so the line is temporarily disconnected and the call is made again.

Next, the operation of the duplex communication control unit 23 at the time of re-calling will be explained with reference to the flowchart of FIG. first,
The fault page data registered in the communication management section in step S12, that is, the values of the transmission page counter and the delivery confirmation page counter are read out (step S21). Subsequently, it is determined whether the value of the transmission page counter is an odd number (step S22), and if this determination is affirmative, retransmission is performed from the page whose delivery confirmation page counter is incremented by 1 (step S23). On the other hand, if the determination in step S22 is negative, the process advances to step S24, and retransmission is performed starting from the page indicated by the delivery confirmation page counter. Thereafter, the process advances to C in FIG. 3, and the two-sided communication operation continues from step S3.

As is clear from the above explanation, in this embodiment, if a communication failure occurs during two-sided communication and transmission becomes abnormal, steps S7 to S9 are performed. In the case of retransmission, the receiving side always receives the image information from the front side, and can receive the image data of the transmitted document without destroying the relationship between the front and back sides.

For example, if the double-sided original to be sent has 10 pages and a communication failure occurs while sending the 5th page, the values of the sent page counter and delivery confirmation page counter will be 5 and 4, respectively.
becomes. Therefore, since the value of the transmission page counter is an odd number, the determination in step S7 is affirmative, and the process proceeds to step S8, where retransmission is performed from the page where 1 is added to the value of the delivery confirmation page counter, that is, the fifth page. Therefore, the receiving side can receive image data from the front page.

Further, if a communication failure occurs during the transmission of the sixth page of the 10-page double-sided original, the values of the transmission page counter and the delivery confirmation page counter become 6 and 5, respectively. Therefore, since the value of the transmission page counter is an even number, the determination in step S7 is negative, and the process proceeds to step S9, where retransmission is performed from the page indicated by the delivery confirmation page counter, that is, the fifth page. Therefore, the receiving side can receive image data from the front page. The above operation is performed in the same way when calling again. Note that the processing in steps S7 to S9 is a preferred example of the present invention, and the present invention is not limited thereto, and other modifications are of course possible.

FIG. 6 shows a specific example of an automatic double-sided reading device for a facsimile machine that can be used in the present invention, and FIG. 7 shows a specific example of a double-sided printing device.

In FIG. 6, 31 is a double-sided document mounting table;
32 is a document conveying belt, 33 is a document reversing device, 34 is an optical system for reading the document, and 35 is a CCD.

[0034] Of the double-sided originals placed on the mounting table 31, the bottom original is first sent out in the direction of ■. Thereafter, the document is carried at the position (3) by the action of the document conveyance belt 32, and is scanned and read by the document reading optical system 34. Subsequently, the document conveying belt 32 is reversed, and the document advances along the document reversing device 33 in the directions of (1) and (3). In this process, the original is turned over, held at the position (■), and scanned and read by the original reading optical system 34 again. Thereafter, it is discharged in the direction of ■.

[0035] Through the above operations, a double-sided original can be automatically read.

Further, in FIG. 7, 41 to 44 are paper feed trays of different sizes, 45 is a photosensitive drum for forming a latent image, 46 is a fixing device, and 47 is a discharge tray.

Assuming that paper is now fed from the paper feed tray 41, the top paper is first fed in the direction (■), and at the position where it comes into contact with the photosensitive drum 45, the surface of the photosensitive drum 45 is hidden. A toner image corresponding to the image is transferred. The paper transferred in step (2) is fixed in the process of moving in the direction of (3), and is then sent in the direction of (2).

In the process of being advanced from the position ■ in the direction ■, the paper is reversed, sent in the directions ■, ■, and transferred again at the position ■. At this time, since the paper is turned over, the image will be transferred to the back side. After the transfer, the paper is fixed at the position (■) and sent to the discharge tray 47.

In the above embodiment, the sending side sends a double-sided original, but the present invention is not limited to this; the sending side sends a single-sided original, and the receiving side prints on both sides of the paper. Of course, it can also be used to save money.

[0040]

As is clear from the above description, according to the present invention, when performing facsimile communication after instructing double-sided printing from the panel of a facsimile machine, the image data of the original can be resent due to a communication failure or the like. When doing so, I made it so that I could always resend from the front page (i.e. odd-numbered pages).
This has the effect that the image data of the transmitted document can be received without destroying the relationship between the front and back sides.

[0041] Furthermore, even if the transmission of image data of a document is interrupted due to a communication failure or the like, and the transmission is made again, it is always retransmitted from the front side. This has the advantage that it is possible to receive the data without any interference.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram showing main parts of an embodiment of the present invention.

FIG. 2 is a block diagram showing an overview of the hardware configuration of a facsimile device to which the present invention is applied.

FIG. 3 is a flowchart showing the operation of this embodiment.

FIG. 4 is a flowchart showing the main part of the operation at the time of re-calling in this embodiment.

FIG. 5 is an explanatory diagram of the operation of this embodiment.

FIG. 6 is a schematic diagram showing a specific example of a double-sided document reading device of a facsimile machine according to the present invention.

FIG. 7 is a schematic diagram showing a specific example of a double-sided printing device for a facsimile machine according to the present invention.

[Explanation of symbols]

1a...Double-sided instruction section, 3a...Image input section, 5a...Image data storage section, 21...Communication section, 22...Failure detection section, 23
...Double-sided communication control unit, 24...Transmission page counter, 25...Delivery confirmation page counter.

Claims (2)

[Claims] Claims: 1. A facsimile machine having a double-sided instruction section for instructing double-sided printing, comprising a transmission page counting means for counting the number of transmitted pages, a delivery confirmation page counting means for counting delivery confirmation pages, and a communication failure countermeasure. It is characterized by comprising a failure detection unit for detecting a communication failure, and a retransmission means for retransmitting the transmitted image data from the front side based on the counts of the transmission page counting means and the delivery confirmation page counting means when a communication failure occurs. facsimile machine. 2. A facsimile machine having a double-sided instruction section for instructing double-sided printing, comprising a transmission page counting means for counting the number of transmitted pages, a delivery confirmation page counting means for counting delivery confirmation pages, and a communication failure prevention unit. a failure detection unit for detecting a failure; a failure data registration unit for registering the values counted by the transmission page counting means and the delivery confirmation page counting means when a communication failure occurs and the transmission of image data is interrupted; and retransmission means for retransmitting transmission image data from the front side based on the data registered in the failure data registration means.