Abstract:
The invention provides a facsimile apparatus capable of smooth transmission without trouble in a receiving unit, even in case of two-side reading of a long original. 
     According to the invention, in case the reading of two-side original is selected, the sub scanning length of the original is detected an the transmission control is modified according to the sub scanning length. In case the sub scanning length of the original exceeds a predetermined length, the user is caused to select either to (1) transmit such original as a one-sided original to the receiving unit with informing the receiving unit of that, or (2) to transmit the original information corresponding to a predetermined length on the front side of the original as the front side information and transmit the remaining original information on the front side as the backside. In case such one-side transmission is selected, after the transmission of the original information of the front side, the original information of the back side is subsequently transmitted as a one-sided original to the receiving unit with informing the receiving unit of that, but, in case such two-side transmission is selected, after the transmission of the original information of the front side, the original information on the back side corresponding to a predetermined length is subsequently transmitted as the front side and the remaining original information on the back side is transmitted as the back side.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a facsimile apparatus capable particularly of transmitting two-side original. 
     2. Related Background Art 
     In the conventional facsimile apparatus capable of transmitting two-side original, in case the two-side reading is selected, the original information of the front side is transmitted with designation of the transmission of the top side (or front side), irrespective of the sub scanning length of the original information, and then the original information of the back side is transmitted with designation of the back side. 
     In the above-described method, the two-sided original, is read and the read data is transmitted with designating the front or back side. However, since in the receiving unit (or station), the recording sheet is often available only in a fixed size, there is encountered a major drawback that the control for the two-sided recording in the receiving unit becomes difficult if a long-sized original is transmitted from the transmitting unit. 
     SUMMARY OF THE INVENTION 
     In consideration of the foregoing, the object of the present invention is to provide a facsimile apparatus capable of smooth transmission without causing a trouble in the receiving side, even in case a long-sized two-sided original is read. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a block diagram of an embodiment of the present invention; and 
     FIGS. 2,  3 ,  4 ,  5 ,  6 ,  7 ,  8 ,  9  and  10  are flow charts showing the control sequence in the above-mentioned embodiment. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     FIG. 1 is a block diagram showing the configuration of a facsimile apparatus, constituting an embodiment of the present invention. 
     Referring to FIG. 1, an NCU (network control unit)  2  is connected to a terminal of a telephone network for utilizing the same for data communication and executes connection control for the telephone network, switching to a data communication path, and retaining of a loop. The NCU  2  connects a telephone line  2   a  to a telephone set  4  or a facsimile apparatus according as the signal level on a signal line  20   a  from a control circuit  20  is “0” or “1”. In the normal state, the telephone line  2   a  is connected to the telephone set  4 . 
     A hybrid circuit  6  separates transmission signals and reception signals, and transmits the transmission signal from an adder circuit  12  to the telephone line  2   a  through the NCU  2  and receives the signal from a partner station through the NCU  2  for supply to a modem  8  through a signal line  6   a.    
     The modem  8  executes modulation and demodulation based on the ITU-T recommendations V.8, V.21, V.27 ter, V.29, V.17 and V.34, and each transmission mode is designated by a signal line  20   c . The modem  8  receives a signal outputted on a signal line  20   b  and outputs modulated data to a signal line  8   a , and also receives a reception signal outputted on the signal line  6   a  and outputs demodulated data to a signal line  8   b.    
     An ANSam send-out circuit  10 , for sending out an ANSam signal. This circuit sends out the ANSam signal or none to a signal line  10   a  according as the signal on a signal line  20   d  is at a level “1” or “0”. The adder circuit  12  receives the signals of the signal lines  8   a  and  10   a  and outputs the result of addition to a signal line  12   a.    
     A reading circuit  14  reads the original image for example with a CCD, and outputs the read data to a signal line  14   a . The reading circuit  14  reads the front side or back side of the original according as the signal on a signal line  20   i  is at a level “0” or “1”. 
     A recording circuit  16  records, line by line, the information outputted on a signal line  20   e . A memory circuit  18  is used for storing the original or encoded information of the read data, and the received or demodulated information. 
     An operation unit  22  is provided with a one-touch dial, a contracted number dial, numeral keys, “*” and “#” keys, a start key, a set key, a stop key, a registration key for a memory circuit  30  and other function keys, and outputs the information of a depressed key to a signal line  22   a.    
     A both side reading selection button  24  is to be depressed in case of selecting the two-side reading (both side reading), and, upon depression, generates a depression pulse on a signal line  24   a.    
     A both side reading display circuit  26 , for displaying the selection of the two-side reading assumes a state of “no display” upon generation of a clear pulse on a signal line  20   f , and thereafter repeats states of “display” and “no display” in response to depression pulses generated on the signal line  24   a . The display circuit  26  outputs a signal of a level “1” or “0” on a signal line  26   a  respectively in the “display” or “no display” state. 
     An original length (sub scan length) detection circuit  28  serves to detect, in the original reading, the length of the original in the sub scanning direction. When the resolution in the sub scanning direction is designated by a signal line  20   g  (“0” for 3.85 line/mm, “1” for 7.7 line/mm or “2” for 15.4 line/mm) and a sub scanning length measurement start pulse is subsequently generated on a signal line  20   h , the detection circuit  28  determines the original length (sub scanning length) from the read line information outputted on the signal line  14   a  and the resolution on the signal line  20   h  and outputs the original length to a signal line  28   a.    
     A registration circuit  30  stores “transmission as one-sided original” or “transmission as two-sided original” for selecting the transmitting operation for the long-sized two-side original. 
     More specifically, in the present embodiment, in case the reading of a two-sided original is selected Band the original is long in size, the information on the original is read in succession from the front side and the back side. In transmitting thus read information, if “transmission as one-sided original is selected, the information of the read two-sided original is divided into a sub scanning length of a fixed sheet size corresponding in the main scanning direction to the read original size, and all the original information, both of the front and back sides, is transmitted as the information of the front side. 
     On the other hand, if “transmission as two-sided original” is selected, the information of the two-sided original is divided into a sub scanning length of a fixed sheet size corresponding in the main scanning direction to the read original size, and at first the original information of the front side is transmitted as the front side, and then remainder of the original information of the front side is transmitted as the back side. If the original information of the front side still remains, the above-described procedure is repeated until no remainder is existent. Then the original information of thus divided back side is transmitted as a side that is opposite to the side assigned to the immediately preceding final portion of the original information of the front side (namely if the immediately preceding transmission (final portion of the original information of the front side) is designated as “front” side, the initial portion of the original information of the back side is designated as “back” side, while if designated as “back” side, it is designated as “front” side), and then remainder of the original information of the back side is transmitted as a side opposite to the side thus assigned to the initial portion of the original information of the back side. If the original information of the back side still remains, the above-described procedure is repeated until no remainder is existent. 
     The “transmission as one-side original” or “transmission as two-side original” is registered in the registration circuit  30  through a signal line  30   a.    
     The control circuit  20  controls the entire facsimile apparatus of the present embodiment capable of two-side original reading, and, particularly in the present embodiment, in case the reading of the two-sided original is selected, executes the following control of detecting the sub scanning length and varying the transmission based on such sub scanning length. 
     More specifically, in the present embodiment, there is contemplated the original information of A4 size only in the main scanning direction, and, if the reading of two-sided original is selected, the sub scanning length of the original information not exceeding 330 mm is transmitted with compression to 297 mm. If the sub scanning length of the original information exceeds 330 mm, the information read from the front side and the back side of the original is respectively divided into 297 mm, and, if “transmission as one-side information” is selected, the original information of the front side and that of the back side are both transmitted under the designation of the front side. 
     On the other hand, if “transmission as two-sided original” is selected in the registration circuit  30 , the information of the two-sided original is divided into a sub scanning length of a fixed sheet size corresponding in the main scanning direction to the read original size, and at first the original information of the front side is transmitted as the front side, and then remainder of the original information of the front side is transmitted as the back side. If the original information of the front side still remains, the above-described procedure is repeated until no remainder is existent. Then the original information of thus divided back side is transmitted as a side that is opposite to the side assigned to the immediately preceding final portion of the original information of the front side (namely if the immediately preceding transmission (final portion of the original information of the front side) is designated as “front” side, the initial portion of the original information of the back side is respectively designated as “back” side), while if designated as “back” side, it is designated as “front” side, and then remainder of the original information of the back side is transmitted as a side opposite to the side thus assigned to the initial portion of the original information of the back side. If the original information of the back side still remains, the above-described procedure is repeated until no remainder is existent. 
     FIGS. 2 to  10  are flow charts showing the control sequence of the control circuit  20  in the present embodiment. 
     Referring to FIG. 2, a step SO starts the control sequence, and a step S 2  generates a clear pulse on the signal line  20   f , whereby the two-side reading display circuit  26  does not execute display. 
     A step S 4  outputs a signal of a level “0” on the signal line  20   i , thereby designating the reading of the front side of the reading circuit  14 . A step S 6  registers, through the signal line  30   a , “transmission as two-side original” in the transmission type registration circuit  30 . 
     A step S 8  outputs a signal of a level “0” to the signal line  20   a , thereby turning off the CML. A step S 10  outputs a signal of a level “0” to the signal line  20   d , thereby not sending out the ANSam signal. 
     A step S 12  discriminates whether transmission is selected, and a step S 14  discriminates whether reception is selected. The sequence proceeds to a step S 40  or S 18  according as the transmission or reception is selected. But, if neither is selected, the sequence proceeds to a step S 16  for other processes, and then to a step S 178 . 
     A step S 18  outputs a signal of a level “1” to the signal line  20   a , thereby turning on the CML. A step S 20  executes a pre-procedure for informing that the two-side recording is possible and the front or back side can be designated by an MPS signal. The next page is judged as the front side or back side according as a signal MPS 1  or MPS 2  is received. Also the first page is judged as the front side. 
     A step S 22  discriminates whether the two-side recording (both side recording) is designated from the transmission unit, and the sequence proceeds to a step S 28  or S 24  according as the two-side recording is designated or it is not. 
     A step S 24  executes reception of the image signal of all the pages and recording thereof on the front side, and a step S 26  executes a post procedure, whereupon the sequence proceeds to the step S 8 . 
     A step S 28  executes reception of the image signal of one page and recording thereof on the front side, and a step S 30  executes a post procedure. A step S 32  discriminates whether the pages is the last page, and, if so, the sequence proceeds to a step S 34  for the post procedure and then to the step S 8 . 
     If not the last page, the sequence proceeds to a step S 36  for discriminating whether the MPS 1  signal is received, and the sequence proceeds to the step S 28  if the MPS 1  signal is received, but, if the MPS 2  signal is received, the sequence proceeds to a step S 38  for receiving the image signal of a page and recording the same on the back side of the recording sheet and then to the step S 30 . 
     A step S 40  enters the information of the signal line  26   a  for discriminating whether the two-side reading is selected, and the sequence proceeds to a step S 50  or S 42  according as the two-side reading is selected or not. 
     A step S 42  outputs a signal of a level “1” to the signal line  20   a , thereby turning on the CML. A step S 44  executes a pre-procedure, designating the one-side recording. Then a step S 46  executes reading of the image signal of the front side of all the pages and transmission thereof. Then the sequence proceeds to a step S 48  for post procedure and then to the step S 8 . 
     A step S 50  sets “1” in a page counter. A step S 52  sets the front side as the page side, then a step S 54  outputs the reading line density to the signal line  20   g , and a step S 56  generates the original length measurement start pulse on a signal line  20   h . A step S 58  reads the original information corresponding to the page counter and the page side, encodes and stores the information in the memory. A step S 60  memorizes the sub scanning length, corresponding to the page counter and the page side. 
     A step S 62  judges the content of the page side, and, if it is front side, the sequence proceeds to a step S 64  for setting the back side as next page side and then to the step S 54 . If it is back side the sequence proceeds to a step S 66  for discriminating whether a next page exists, and the sequence proceeds to a step S 52  or S 68  according as the next page exists or not. 
     A step S 68  discriminates whether an original exceeding 330 mm is present among the read information, and the sequence proceeds to a step S 122  or S 70  according as such original is present or it is not. 
     A step S 70  outputs a signal of a level “1” to the signal line  20   a , thereby turning on the CML. A step S 72  makes a call to the designated destination, and a step S 74  executes a pre-process. 
     A step S 76  discriminates whether the partner unit has the function of two-side recording and side control by the MPS 1 /MPS 2  signal, and the sequence proceeds to a step S 78  or S 100  according as the result of discrimination is affirmative or it is negative. 
     A step S 78  executes the remaining pre-procedure, thereby informing the designation for two-side recording and the execution of designation for the page side by the MPS 1 /MPS 2  signal. A step S 80  sets “1” in a transmission page counter, then a step S 82  sets the front side as the transmission page side, and a step S 84  transmits the information of one page, of the side set above, designated by the transmission page counter. 
     A step S 86  discriminates whether the transmitted page side has been the front side or the back side, and the sequence respectively proceeds to a step S 88  or S 92 . 
     A step S 88  executes an intermediate procedure (transmitting the MPS 2  signal), then a step S 90  sets the back side as the transmission page side and the sequence proceeds to the step S 84 . 
     A step S 92  discriminates whether a next page is present, and the sequence proceeds to a step S 94  or S 98  according as the next page is present or it is absent. 
     A step S 94  increases the value of the transmission page counter by one, then a step S 96  executes an intermediate procedure (transmitting the MPS 1  signal) and the sequence proceeds to the step S 82 . A step S 98  executes a post procedure and the sequence proceeds to the step S 8 . 
     A step S 100  executes the remaining pre-procedure. The two-side recording is not designated in this case. A step S 102  sets “1” in the transmission page counter, then a step S 104  sets the front side as the transmission page side, and a step S 106  transmits the information of a page, of the side set above, designated by the transmission page counter. 
     A step S 108  discriminates whether the transmitted page side has been the front side or the back side, and the sequence respectively proceeds to a step S 110  or S 114 . 
     A step S 110  executes an intermediate procedure (transmitting the MPS signal), then a step S 112  sets the back side as the transmission page side and the sequence proceeds to the step S 106 . 
     A step S 114  discriminates whether a next page is present, and, if absent, the sequence proceeds to a step S 120  for executing a post procedure and then to the step S 8 . On the other hand, if the next page is present, a step S 116  increases the value of the transmission page counter by one, then a step S 118  executes an intermediate procedure (transmitting the MPS signal) and the sequence proceeds to the step S 104 . 
     A step S 122  divides the transmission information, corresponding to the page counter and the page side, by 297 mm. More specifically, at first the front side of the first page is divided at 297 mm and thus divided information is represented as “1” by a divided page counter. The remaining information of the front side of the first page, if not exceeding 297 mm, is represented as “2” by the divided page counter. The back side of the first page is similarly divided at 297 mm and the divided portions are represented as “3” and “4” in the divided page counter. Similar operations are thereafter repeated, and the number of pages in the divided page counter is determined. 
     A step S 124  then outputs a signal of a level “1” to the signal line  20   a , thereby turning on the CML. A step S 126  makes a call to the designated destination, and a step S 128  executes a pre-procedure. 
     A step S 130  discriminates whether the partner unit has the function of two-side recording and side control by the MPS 1 /MPS 2  signal, and the sequence proceeds to a step S 132  or S 156  according as the result of discrimination is affirmative or it is negative. 
     A step S 132  enters the information of the signal line  30   a  for checking the transmission mode of the registration circuit  30 , and the sequence proceeds to a step S 134  or S 156  according as “transmission as two-side original” or “transmission as one-side original” is registered. 
     A step S 134  executes the remaining pre-procedure, thereby informing the designation for two-side recording and the execution of designation for the page side by the MPS 1 /MPS 2  signal. A step S 136  sets the front side for the page side, then a step S 138  sets “1” in the divided page counter, and a step S 140  transmits the information of a page of the divided page counter. 
     A step S 142  discriminates whether the transmitted page side has been the front side, and the sequence respectively proceeds to a step S 144  or S 148  according as the front side or the back side has been designated. 
     A step S 144  executes an intermediate procedure (transmitting the MPS 2  signal), then a step S 146  sets the back side as the page side and the sequence proceeds to the step S 140 . 
     A step S 148  discriminates whether a next divided page is present, and, if absent, the sequence proceeds to a step S 155  for executing a post procedure and then to the step S 8 . 
     On the other hand, of a next divided page is present, the sequence proceeds to a step S 150  for increasing the value of the divided page counter by one. Subsequently a step S 152  executes an intermediate procedure (transmitting the MPS 1  signal), then a step S 154  sets the front side as the designated side and the sequence proceeds to the step S 140 . 
     A step S 156  executes the remaining pre-procedure. The two-side recording is not designated in this case. A step S 158  sets “1” in the divided page counter, then a step S 160  sets the front side as the designated side, and a step S 162  transmits the information of a page of the divided page counter. 
     A step S 164  discriminates whether the side designation has been the front side, and the sequence proceeds to a step S 166  or S 170  according as the front side or back side is designated. 
     A step S 166  executes an intermediate procedure (transmitting the MPS signal), then a step S 168  sets the back side as the side designatio, and the sequence proceeds to the step S 162 . 
     A step S 170  discriminates whether a next divided page is present, and, if present, the sequence proceeds to a step S 172 , but, if absent, the sequence proceeds to a step S 176  for executing a post procedure and then to the step S 8 . 
     A step S 172  increases the value of the divided page counter by one, and-a step S 174  executes an intermediate procedure (transmitting the MPS signal). 
     A step S 178  enters the information of the signal line  22   a  for discriminating whether the registration in the registration circuit  30  is selected, and, if selected, the sequence proceeds to a step S 180  to register, in the registration circuit  30 , “transmission as two-side original” or “transmission as one-side original” to the receiving unit, and the sequence then proceeds to the step S 8 . On the other hand, if not selected, the sequence directly proceeds to the step S 8 . 
     In the foregoing explanation, the functions of the control circuit are executed by a CPU therein based on a program stored in a ROM or a RAM therein, but the present invention may also be attained by storing such program in an external memory medium such as a floppy disk, a hard disk, an optical disk, a CD-ROM or a memory card, fetching such program into the control circuit by an exclusive reading device and executing it by the CPU in the control unit. 
     Also the foregoing embodiment has been explained by a facsimile apparatus of stand-alone type, but the present invention is not limited to such embodiment and is likewise applicable to the control of data communication in a comprehensive data processing system in which copying function, electronic filing function, data processing function etc. are combined with the communicating function. 
     Furthermore, the original information of A4 size alone is contemplated in the foregoing embodiment, but similar control is possible for other sizes. Besides, the specific numerical values mentioned in the foregoing embodiment are merely an example and may be suitably altered. 
     As explained in the foregoing, in case of selecting the two-side reading for a long-sized original, the present invention allows to select whether to transmit the information of the two-sided original as a one-sided original by a predetermined length or to transmit the information of the two-sided original as a two-sided original by a predetermined length, to the receiving unit, thereby enabling the transmission matching the actual situation of the receiving unit and ensuing the smooth transmitting operation.