JPH03107276A - Original reading system in facsimile equipment - Google Patents

Abstract

PURPOSE:To transmit or copy a double-sided original simultaneously as it is by arranging original reading means at both sides of the original, and executing alternate reading from a front side and the reading from a rear side. CONSTITUTION:The original 21 is moved in the direction of an arrow mark at a prescribed speed. A slit 22 is arranged so that the illumination light of a fluorescent lamp 24 to light the front side is not transmitted to the rear side, and for the same reason, the slit 23 is arranged. Accordingly, lines read by image sensors 26, 27 respectively come to be different back and forth in the traveling direction of the original. When the reading is started, first of all, the sensor 27 of the rear side reaches the original 21, and one line is read. Next, it is checked whether the original 21 exists at the position of the sensor 26 of the front side or not. If the original 21 does not reach the sensor 26, one line is read again by the sensor 27, and this is repeated. When the original 21 exists at the position of the sensor 26, every one line is read alternately at the front side and the rear face side. When the original 21 passes over the position of the sensor 26, it means that the both sides of the original 21 of one page were read.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a document reading method in a facsimile machine, and particularly to a document reading method in a facsimile device that can read a document from both sides.

(Prior Art) Conventionally, a facsimile machine reads a document from only one side. Therefore, in order to send a double-sided original, you can make a copy of the original and send it as a single-sided original, or you can send all of one side, communicate again, and then send the other side. such as sending
In both cases, sending double-sided originals has problems with facsimile machines, such as not only being time-consuming but also requiring rearrangement of the recording sheets at the receiving end if one side is sent one by one.

(Problems to be Solved by the Invention) The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a document reading method for a facsimile machine that can read double-sided documents as they are. It is.

(Means for Solving the Problems) The present invention provides a document reading system in a facsimile machine, in which document reading means are arranged on both sides of the document in the document reading unit, and reading from the front side and reading from the back side are performed. It is characterized by being carried out alternately.

The alternating reading may be performed line by line, pixel by pixel, or pixel by pixel, or by a plurality of pixels.

The reading means on the front side and the reading means on the back side can be arranged to be shifted from each other in the traveling direction of the document.

(Embodiment) FIG. 1 is a schematic configuration diagram for explaining an embodiment of the present invention. In the figure, 1 is a line, 2 is a line control unit, 3 is a modem, 4 is a ROM that stores programs and fixed data,
5 is a RAM, 6 is a document reading unit, 7 is a recording unit, 8 is an operation unit, and 9 is a main control unit (CPU) that is in charge of overall control of these units.
It is.

The document reading unit 6 has document reading means arranged on the front and back sides of the inserted document so that it can read both sides of the document. The read data is stored in the RAM 5, and is appropriately organized according to the communication status and copy mode, as will be described later.

FIG. 2 is a schematic diagram for explaining an example of a document reading means. (A) is an example in which the sensor is placed at a position away from the document using an optical system. In the figure, 21 is a document, 22 and 23 are slits, 24 and 25 are fluorescent lamps for illuminating the document, and 26 and 27 are image sensors such as CCDs. The original 21 is run at a predetermined speed in the direction of the arrow. The slit 22 is arranged so that the illumination light from the fluorescent lamp 24 illuminating the front side does not pass through to the back side, and the slit 23 is arranged for the same reason. Therefore, image sensor-2
The lines read by 6 and 27 are shifted forward and backward in the traveling direction of the document. FIG. 2(B) is an example using contact type image sensors 28 and 29. Considering the influence of the illumination light from the LED array built into the contact image sensor being transmitted to the opposite side of the document 21, slits 22 and 23 are provided in this example as well, and the sensor position is the same as above. It is arranged in a staggered manner.

FIG. 5 is an example of a flowchart for explaining reading of a document when the image sensors are arranged in a shifted manner as described above.

When reading starts, the document first reaches the sensor on the back side, and one line is read in step 51. 5t
In ep52, it is checked whether there is a document on the front side sensor. This can be investigated using the output of the image sensor. If the document has not reached the sensor on the front side, 5
Loop to stepst and repeat. If there is a document at the front sensor position, 5tep'53 to 5tep
65 in a loop and read one line at a time from the front side and the back side alternately. When the document is fed while switching and repeating this, the document at the sensor position on the back side runs out first. Then, proceed from step 555 to step 56.57, and while looping this, read the front side document line by line. When the document passes the position of the front side sensor, steps 57 and 58 proceed. Now both sides of one page of the document are scanned, and if there is a next page, proceed to Step 58.
The process loops from step 5 to step 51 and repeats the above-described flow.

Load all manuscripts and exit.

In FIG. 5, the amount of movement of the document is detected in accordance with the amount of deviation of the image sensor, and steps 52 and 57
The presence or absence of a document on the image sensor may be determined based on a predetermined amount of movement. □ The flowchart in FIG. 4 is for explaining an example of the operation of the facsimile machine that reads the double-sided original shown in FIG. In this flowchart, the facsimile machine can not only send a document, but also read the document and make a copy.

In the case of double-sided originals, double-sided copying can also be performed.

Prior to starting the operation, the operation unit 8 is used to set in advance whether to transmit or copy, and whether it is a double-sided or single-sided original. 5
If the document is set in tepl and the setting from the operation section described above in 5steps 2 and 3 is for a double-sided document and transmission mode, the process advances to 5step4. Enter the facsimile number of the destination and turn on the communication button in step 5 to communicate. The document is read by simultaneous scanning of both sides. Regarding simultaneous scanning, as described above, substantially simultaneous reading is performed by alternately reading one line at a time. Alternate reading of the front and back sides is not limited to one line at a time, but may be for each dot, or the outputs of the front and back sensors may be read alternately every time a plurality of dots are read. Depending on whether or not the facsimile machine at the communication destination is capable of double-sided reception, the read data is selected in step 5 as to whether to perform double-sided transmission or to send one-sided data sequentially. In the case of making a call using the model information from the destination or speed dialing, selection is made by storing the model along with the speed dial number. If the facsimile machine at the communication destination is capable of simultaneous double-sided recording, double-sided recording is performed in step 522. If the device is not capable of double-sided recording, but stores one-sided or double-sided data in the RAM and records one side at a time, the received document is recorded in step 523.

In step 5, if the destination model is a conventional one-sided receiver, the read double-sided data is transferred to step 8.
On the receiving side, the data is stored in RAM, the lines are rearranged, and the front and back data are each sent as one page of data.On the receiving side, the data is sequentially received in steps 24 and 25.
Recording is done.

If the selected mode in 5tepa is copy mode, the process moves to 5tep9. The above-mentioned double-sided simultaneous scanning is performed, and double-sided simultaneous copying is performed.

At 5tep2, if it is a one-sided original, the process moves to 5tepH. When the output of the image sensor on the front side and the back side detects a predetermined black signal, it becomes 5tepH or 5tep1.
If 2 is selected, there is no need to check the front and back sides when setting a single-sided original, and a certain side of the original is automatically read, and copying or communication is performed in step 513.

An example of simultaneous double-sided recording will be explained with reference to FIG. In the figure, 31 is recording paper, and 32 and 33 are recording heads.

In this example, a thermal head was used as the recording head. The recording paper is capable of thermal recording on both sides. If the heads arranged on both sides are arranged with the same deviation as explained in FIG. 2, the printing on both sides will not be misaligned. Of course, by processing the line data taking into account the amount of deviation, it is possible to arrange the recording head appropriately, and it is also possible to eliminate the deviation and set the front and back sides at the same position.

(Effects of the Invention) As is clear from the above description, according to the present invention, a facsimile machine can read a document from both sides, so it is possible to simultaneously send or copy double-sided documents as they are. Furthermore, even in the case of single-sided originals, when setting the original, it is possible to read and send the original with either the front or the back facing up, and other effects that cannot be obtained with conventional facsimile machines can be expected.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram for explaining one embodiment of a facsimile apparatus of the present invention, FIG. 2 is a schematic diagram of a different embodiment of a document reading section, and FIG. 3 is a schematic diagram of an example of a recording section. 4 are flowcharts for explaining an example of the operation of the facsimile machine of FIG. 1, and FIG. 5 is a flowchart for explaining an example of reading a document. 1... Line, 2... Line control section, 3... Modem,
4...ROM, 5...RAM, 6...document reading section,
7...Recording section, 8...Operation section, 9...Main control section (
(CPU).

Claims (1)

[Claims] A document reading system for a facsimile machine, characterized in that in a document reading section, document reading means are arranged on both sides of the document, and reading from the front side and reading from the back side are performed alternately.